Class / Patent application number | Description | Number of patent applications / Date published |
073114320 | Intake flow rate | 82 |
20080257026 | METHOD AND APPARATUS FOR DETERMINING INTAKE AIR MASS - A method for determining intake air mass into the engine includes equipping an air intake system with an air meter system configured to generate a signal output having a cycle period correlatable to an intake air mass. The signal output from the air meter system is monitored during an event, and successive cycle periods of the signal output from the air meter system are determined. Intake air mass for each of the successive cycle periods is determined and integrated. | 10-23-2008 |
20080307867 | AIR FLOW MEASURING DEVICE - An air flow measuring device has a throttle portion provided in a first sub-passage, a second sub-passage branched from the first sub-passage at an upstream side of the throttle portion, and a flow amount sensor located in the second sub-passage. The second sub-passage is configured to introduce therein a part of air flowing in the first sub-passage, and an inlet of the second sub-passage is open into the first sub-passage at one side in a first radial direction perpendicular to a flow direction of air flowing in the first sub-passage. Furthermore, the throttle portion is provided to gradually reduce a passage dimension of the first sub-passage in a second radial direction, as toward an outlet of the first sub-passage. Here, the second radial direction is perpendicular to a surface defined by the first radial direction and the flow direction of air in the first sub-passage. | 12-18-2008 |
20080307868 | AIR FLOW MEASURING DEVICE - An air flow measuring device includes a first sub-passage portion configured to introduce therein a part of air flowing in an interior of a duct, a passage-area reducing portion provided in the first sub-passage portion to gradually reduce a passage sectional area of the first sub-passage portion as toward an outlet of the first sub-passage portion, and a second sub-passage portion branched from the first sub-passage portion at an upstream side of the passage-area reducing portion in a flow direction of air flowing in the first sub-passage portion. The second sub-passage portion is configured to introduce therein a part of air flowing in the first sub-passage portion. Furthermore, a flow amount sensor is located at an inlet of the second sub-passage portion, at which the second sub-passage portion is branched from the first sub-passage portion, to measure a flow amount of air flowing in the second sub-passage portion. | 12-18-2008 |
20080307869 | AIR FLOW MEASURING DEVICE - An air flow measuring device includes a flow amount sensor for measuring a flow amount of air in a duct, and a tube body for defining a bypass passage in the duct. An upstream end surface of the tube body has an inlet of the bypass passage, and a downstream end surface thereof has an outlet of the bypass passage. An outer diameter of an outer peripheral surface of the tube body has a smallest dimension at the upstream end surface, and a largest dimension at the downstream end surface. Furthermore, the outer peripheral surface of the tube body has an upstream portion extending downstream from the upstream end surface in a predetermined range, and the upstream portion of the outer peripheral surface is a convex curve surface in which the outer diameter is increased by a ratio from the upstream end surface toward downstream. | 12-18-2008 |
20080314132 | THROTTLE UPSTREAM PRESSURE ESTIMATING APPARATUS AND CYLINDER CHARGED AIR QUANTITY CALCULATING APPARATUS FOR INTERNAL COMBUSTION ENGINE - In a non-critical pressure region where a pressure ratio [Pm/Pthrup(i−1)] of an intake air pressure Pm(throttle downstream pressure) detected by an intake air pressure sensor to a previous throttle upstream pressure Pthrup(i−1) is greater than a predetermined value B, the previous throttle upstream pressure Pthrup(i−1) is substituted for one of two terms of the throttle upstream pressures Pthrup(i) included in an intake system model so that present throttle upstream pressure Pthrup(i) is calculated. In a critical pressure region where the pressure ratio is less than or equal to the predetermined value B, a physical value f(Pm/Pthrup(i)) using a pressure ratio [Pm/Pthrup(i)] of the intake air pressure Pm to a present throttle upstream pressure Pthrup(i) as a parameter is regarded as a steady value fc so that the present throttle upstream pressure Pthrup(i) is calculated. | 12-25-2008 |
20090000366 | FLOW RATE MEASURING APPARATUS - A flow rate measuring apparatus can reduce flow rate detection errors resulting from a temperature difference between an inside and an outside of piping. A base has a base main body which is formed at its base end with a connector protruding to the outside of the piping, and a flange which is formed on the base main body and is fitted into an insertion hole in the piping. A plate made of PBT resin is arranged on the base, and a flow rate detection element is formed on the plate so as to be exposed therefrom. A circuit board is arranged at a side of the plate opposite to the connector. A housing has a fluid passage groove that cooperates with the plate to form a measuring passage in which the flow rate detection element is disposed, and an enclosure portion enclosing the circuit board. A cover closes the enclosure portion. | 01-01-2009 |
20090049897 | METHOD FOR ON-LINE ADAPTATION OF ENGINE VOLUMETRIC EFFICIENCY USING A MASS AIR FLOW SENSOR - An electronic engine controller is configured to execute a process of adapting a base value of the volumetric efficiency of an engine through the addition of a correction value of the volumetric efficiency. The process includes comparing an estimated mass air flow value calculated using a speed-density equation, with an actual mass air flow value measured by a mass air flow (MAF) sensor. A percentage error of the estimated mass air flow value as compared to the actual mass air flow value is calculated. When the percentage error indicates that the air flow is at steady state, then the process updates the VE correction value, by integrating the percentage error. The new correction value, thus computed, is then stored in a cell of an array corresponding to the current engine operating condition. The process is configured to add the correction value to the corresponding base value to produce an updated value of the VE, valid for that operating condition. The process accommodates changes in the volumetric efficiency of the engine due to part aging and deposit build-up over time, among other things. The updated VE value may then be used for mass air flow estimation and accordingly for fueling control as well. | 02-26-2009 |
20090308147 | Air Flow Measuring Device - An air flow measuring device can suppress the degradation of measurement accuracy due to variations in attachment position. The air flow measuring device includes a body with a main air passage, a sensor attached to the body for detecting a flow rate of air passing through the main air passage, and a positioning part that positions the body and the sensor. The positioning part is configured to be exposed to the outside. | 12-17-2009 |
20100000308 | FLOW RATE MEASURING APPARATUS - An inflow port and an outflow port of a bypass passage have openings on a front surface near a projecting end and on a bottom surface, respectively, of a bypass passage forming member. A recess portion is disposed on the front surface of the bypass passage forming member on a circuit housing portion side of the inflow port so as to extend at a predetermined depth over an entire region in a longitudinal direction of a short side of a rectangular cross section of the bypass passage forming member. | 01-07-2010 |
20100095753 | Air flow measuring device - An air flow measuring device has a throttle portion provided in a first sub-passage, a second sub-passage branched from the first sub-passage at an upstream side of the throttle portion, and a flow amount sensor located in the second sub-passage. The second sub-passage is configured to introduce therein a part of air flowing in the first sub-passage, and an inlet of the second sub-passage is open into the first sub-passage at one side in a first radial direction perpendicular to a flow direction of air flowing in the first sub-passage. Furthermore, the throttle portion is provided to gradually reduce a passage dimension of the first sub-passage in a second radial direction, as toward an outlet of the first sub-passage. Here, the second radial direction is perpendicular to a surface defined by the first radial direction and the flow direction of air in the first sub-passage. | 04-22-2010 |
20100154522 | METHOD AND DEVICE FOR DETERMINING THE "PHASING" OF AN INTERNAL COMBUSTION "V" ENGINE - A method of determining the “phasing” of an internal combustion engine includes two banks of cylinders each supplied by its own intake manifold. This determining method consists, on the one hand, in equipping each intake manifold with an air flow meter and in measuring the air flow rate in each of the manifolds so as to detect an increase in the air flow rate in one of the manifolds representative of an intake of air into the bank of cylinders supplied by the manifold, and, on the other hand, in equipping one of the rotary members, crankshaft or camshaft associated with each bank of cylinders with a target that rotates as one with the rotary member and is able to determine which cylinder of the bank of cylinders determined to be in the intake phase is in the air intake phase. | 06-24-2010 |
20110107826 | APPARATUS AND METHOD FOR MASS AIR MEASURING - The present invention is designed to measure air mass flow for fuel injection applications, by utilizing a digital signal processor as part of the air measuring device's circuitry so that calibration tables associated with various engine types may be loaded into the processor. The digital signal processor stores a plurality of calibration tables for various engine types onboard. These may be chosen through the use of an external programming device or an onboard selection device such as a switch. The digital signal processor will convert output into either voltage or frequency outputs depending on the requirements of the particular engine control unit. | 05-12-2011 |
20110179858 | SENSOR SYSTEM FOR DETERMINING A PARAMETER OF A FLUID MEDIUM - A sensor system for determining at least one parameter of a fluid medium which flows in a main flow direction, e.g., an intake air mass flowing through a flow pipe, includes at least one sensor situated in the fluid medium and at least one grating which is situated transversely to the main flow direction and which has at least one bar. On at least one surface over which the fluid medium flows, the bar has at least one shearing element which is designed to generate a region in the flow having a turbulent flow downstream from the shearing element. | 07-28-2011 |
20110296904 | AIR FLOW RATE MEASURING DEVICE - An air flow rate measuring device includes a housing, a sensor assembly, and an urging mechanism. The housing defines an internal flow passage, through which air taken in by the device passes, and the housing includes a contact surface. The sensor assembly includes a sensor chip and a contact surface. The sensor chip is configured to generate an electrical signal through a heat transfer phenomenon. The sensor assembly is inserted and fixed in the housing such that the sensor chip is exposed to the internal flow passage. The contact surface of the sensor assembly is in surface contact with the contact surface of the housing. The urging mechanism is configured to press the contact surface of the sensor assembly on the contact surface of the housing, so that the sensor assembly is fixed to the housing by the urging mechanism. | 12-08-2011 |
20120240668 | AIR FLOW MEASUREMENT DEVICE - An air flow measurement device arranged in an intake passage includes a bypass passage having an inlet from which a part of a main flow of an intake air is introduced, and an outlet from which the introduced intake air flows out. A sensor is located in the bypass passage to generate an electrical signal, and the bypass passage communicates with the intake passage through a hole portion. The outlet is open toward a downstream side of the intake passage in a flow direction of the main flow of the intake air. The hole portion is located within an outlet projected area that is provided by projecting an open area of the outlet in straight and toward upstream in the flow direction of the main flow on a projection surface perpendicular to the flow direction of the main flow. | 09-27-2012 |
20120279291 | SYSTEM AND METHOD FOR ESTABLISHING A MASS FLOW RATE OF AIR ENTERING AN ENGINE - A method of establishing a mass flow rate of air entering an engine includes establishing an input voltage by an energy supply device to energize a mass-air-flow sensor. The method also includes generating an output frequency via the mass-air-flow sensor in response to the mass flow rate of air entering the engine and determining the flow rate using the generated output frequency. The method additionally includes comparing the generated output frequency with a predetermined threshold output frequency that corresponds to the established input voltage. Additionally, the method includes selecting the determined flow rate as the established flow rate if the generated output frequency is at or below the predetermined threshold output frequency. Furthermore, the method includes selecting a predetermined alternative algorithm to generate the established flow rate if the generated output frequency is above the predetermined threshold output frequency. A system for establishing the mass flow rate is also provided. | 11-08-2012 |
20120291533 | FLOW-RATE MEASURING APPARATUS - A converting map for an area of a backward air-flow is set based on a relationship between an output and a flow-rate, which are obtained in an air flow in which pulsation including the backward air-flow is generated. The backward air-flow has a dynamic property. The converting map of the present disclosure has a conversion characteristic, which is close to a characteristic in the backward air-flow. Accordingly, it is not necessary to correct the converting map by complicated processes and thereby accuracy of measurement for the area of the backward air-flow is increased. | 11-22-2012 |
20130008243 | AIR FLOW MEASURING DEVICE - An air flow measuring device includes a housing, a sensor, and a projection portion. The housing defines a bypass flow passage through which taken-in intake air passes and which has an outlet that opens into an intake passage toward a downstream side of a mainstream of intake air. The sensor is accommodated in the bypass flow passage to produce an electrical signal as a result of heat transfer between the taken-in intake air and the sensor. The projection portion is provided on an outer wall of the housing on a downstream side of the outlet in the mainstream and extends outward of the housing. A projection-portion projected region and an outlet projected region, which are formed respectively by projecting the projection portion and the outlet perpendicularly onto a projection plane that is perpendicular to a direction of the mainstream, overlap with each other. | 01-10-2013 |
20130014572 | AIRFLOW MEASURING DEVICEAANM Kitahara; NoboruAACI Kariya-cityAACO JPAAGP Kitahara; Noboru Kariya-city JP - An airflow measuring device has a bypass passage accommodating a thermal-type sensor configured to conduct heat transfer with air. A mainstream of intake air partially flows through the bypass passage and flows out of an outlet, as an after-bypass-passage flow. The mainstream partially flows along the outer surface of the airflow measuring device, without passing through the bypass passage, as an outside-passage flow. The outer surface of the airflow measuring device defines a throttle at the downstream of the outlet. The throttle merges the after-bypass-passage flow with the outside-passage flow and guides the merged flow to the downstream. | 01-17-2013 |
20130014573 | AIR FLOW MEASURING DEVICEAANM KAMIYA; ShinichiAACI Kariya-cityAACO JPAAGP KAMIYA; Shinichi Kariya-city JPAANM Kitahara; NoboruAACI Kariya-cityAACO JPAAGP Kitahara; Noboru Kariya-city JP - An air flow measuring device takes in part of intake air flowing through an intake passage. The device includes a housing and a sensor. The housing defines a bypass flow passage through which taken-in intake air passes and which has an outlet that opens on an outer wall of the housing. The sensor is accommodated in the bypass passage to produce an electrical signal as a result of heat transfer between taken-in intake air and the sensor. The outlet of the bypass passage includes vertical and non-vertical openings. The vertical opening opens toward a downstream side of a flow of intake air in the intake passage and is provided perpendicular to the flow of intake air. The non-vertical opening is provided non-perpendicularly to the flow of intake air in the intake passage. The outlet is a continuous stretch of opening where the vertical and non-vertical openings are continuously formed. | 01-17-2013 |
20130025353 | Air Mass Flowmeter - An air mass flowmeter having a sensor module fitted in a tube for measuring a gas quantity flowing in the tube at a flow speed. The sensor module extends in the tube. A start of the sensor module defines a first plane and an end of the sensor module defines a second plane both normal to the direction of flow. Extended flow directing elements are arranged in the tube parallel to the direction of flow so that the gas flows onto end faces and wall regions of the flow elements. The wall regions extend between the first and second planes and increase the flow speed of the gas given a low flow speed, relative to the flow speed in the tube, and increase the flow speed of the gas to a lesser extent, given a high flow speed of the gas relative to the flow speed. | 01-31-2013 |
20130055798 | Method Of Controlling Fuel Composition Learning - A method of controlling fuel composition learning includes steps of monitoring changes in airflow within an engine to determine steady state conditions. The method further includes steps of initiating a fuel composition learning process during steady state conditions. A current fuel component concentration factor is updated using a temporary fuel component concentration factor. The temporary fuel component concentration factor is calculated as the average of an air/fuel correction factor. Once the current fuel component concentration factor is updated, the temporary fuel component concentration factor is reset. The air/fuel correction factor is reset to reflect any difference that existed between the temporary fuel component concentration factor and the air/fuel correction factor at the update time. | 03-07-2013 |
20130055799 | AIR FLOW MEASURING DEVICE - An air flow measuring device includes a measured passage and a sensor portion. Measured air which is a measuring object flows through the measured passage. The sensor portion is disposed in a sensor arrangement portion of the measured passage and is configured to measure a flow rate of measured air flowing through the measured passage. The measured passage includes an upstream bent portion on an upstream side of the sensor arrangement portion in a flow direction of measured air. The upstream bent portion includes an upstream throttle that partly decreases a passage area of the measured passage. | 03-07-2013 |
20130055800 | AIR FLOW MEASURING DEVICE - An air flow measuring device includes a housing, a sensor, and a throttle that is provided on an outer wall surface of the housing. The throttle merges together a bypass-passing flow and an outside-passing flow, and guides the merged flow toward the downstream side with the merged flow narrowed. The throttle includes two raised portions and a cover that bridges between the two raised portions and is opposed to the outer wall surface of the housing. The cover includes an inner surface exposed to the throttle, and an outer surface exposed to outside of the throttle. A peripheral border of the cover includes an upstream edge which defines the outer surface on the upstream side. At least a region of the outer surface including the upstream edge is swollen more outwardly in a shape of a projecting curved surface further on the downstream side. | 03-07-2013 |
20130118242 | AIR FLOW MEASURING DEVICE AND METHOD OF MAKING HOUSING FOR THE DEVICE - An air flow measuring device includes a housing, a sensor, and a conduction member. The housing defines a bypass flow passage through which taken-in air passes. The sensor is accommodated in the bypass passage and produces an electrical signal as a result of heat transfer between taken-in air and the sensor. The conduction member includes first and second terminals. The first terminal outputs the electrical signal produced by the sensor to outside. The second terminal supplies electric power to the sensor. The housing is provided through an assembly process and a molding process. In the assembly process, the conduction member is held by a primarily shaped product defining the bypass passage to provide an assembly. In the molding process, the assembly, with the conduction member held by the primarily shaped product, is inserted into a predetermined die and a secondary molded part is injection-molded in the die. | 05-16-2013 |
20130125635 | AIR FLOW MEASURING DEVICE - An air flow measuring device includes an air flow meter (AFM), a straightening grid, and a mesh member. The AFM includes an air inlet and is configured to measure a flow rate of air flowing into the air inlet. The straightening grid includes a straightening plate having only one crossing region and is disposed on an upstream side of the AFM in a flow direction of air to straighten a flow of air toward the AFM through the straightening plate. The mesh member is formed in a netted manner and is disposed between the straightening plate and the AFM. | 05-23-2013 |
20130192354 | AIRFLOW MEASURING DEVICE - A first passage has a branch position where a second passage is branched from the first passage to move air along a reference vector. The second passage accommodates a thermal sensor. The first passage has a throttle at a downstream of the branch position. The throttle has a throttle wall surface having a normal vector directed inwardly. A width direction is perpendicular to both a flow direction of air in the throttle and the reference vector. The throttle wall surface has a specific region, in which the normal vector includes a vector component in the width direction, and an angle θ between the normal vector and the reference vector is in a range of 90 degrees<θ<180 degrees. | 08-01-2013 |
20130298653 | Method Of Controlling Fuel Composition Learning - A method of controlling fuel composition learning includes steps of monitoring changes in airflow within an engine to determine steady state conditions. The method further includes steps of initiating a fuel composition learning process during steady state conditions. A current fuel component concentration factor is updated using a temporary fuel component concentration factor. The temporary fuel component concentration factor is calculated as the average of an air/fuel correction factor. Once the current fuel component concentration factor is updated, the temporary fuel component concentration factor is reset. The air/fuel correction factor is reset to reflect any difference that existed between the temporary fuel component concentration factor and the air/fuel correction factor at the update time. | 11-14-2013 |
20140123741 | SENSOR DEVICE FOR DETECTING AT LEAST ONE FLOW PROPERTY OF A FLUID MEDIUM - A sensor device for detecting at least one flow property of a fluid medium, in particular for detecting the air flow in the intake tract or the charge air tract of an internal combustion engine is provided. The sensor device has a sensor housing, which has an electronics chamber, an electronic module being situated at least partially in this electronics chamber. The electronic module has at least one support profile and at least one circuit carrier connected to the support profile. The circuit carrier carries at least one evaluation circuit. The sensor device is characterized in that electronic components are situated on the circuit carrier, on both a top side and a bottom side, and the support profile has a cavern which accommodates at least one electronic component situated on a bottom side of the circuit carrier. | 05-08-2014 |
20140174166 | SENSOR DEVICE FOR DETECTING AT LEAST ONE FLOW PROPERTY OF A FLUID MEDIUM - A sensor device for detecting a flow property of fluid medium, e.g., an air flow in the intake tract or the charge air tract of an internal combustion engine, includes: a sensor housing introduced into the air flow and having at least one housing body, at least one cover, and at least one channel through which the fluid medium flows; a sensor element for detecting the flow property, the sensor element being held on a top side of a carrier. The carrier is situated at least partially in the channel and has a cross section which becomes wider in parallel with the main flow direction of the fluid medium at the location of the sensor element in a sectional plane in parallel to the main flow direction of the fluid medium in the channel. | 06-26-2014 |
20140373612 | Method for operating an air mass sensor - A method for operating an air mass sensor arranged in the intake section of an internal combustion engine and configured to measure the mass of the air flowing through the intake section includes the air mass sensor detecting a stationary state of the internal combustion engine using an element for evaluating measurement signals generated by an air mass sensor element, and, in response to detection of a stationary state, switching the air mass sensor element into a second operating mode that reduces contamination of the air mass sensor element. The second operating mode permits at least one measurement of the air mass flowing in the intake section, as a result of which the air mass sensor itself detects a starting of the internal combustion engine using the element for evaluating the measurement signals generated by the air mass sensor element. | 12-25-2014 |
20150040652 | INTAKE AIR VOLUME MEASURING DEVICE FOR INTERNAL COMBUSTION ENGINE - Disclosed is an intake air volume measuring device for an internal combustion engine. The device includes an air flow meter located in an intake air path of the internal combustion engine, to measure the volume of intake air into the combustion chamber of the internal combustion engine based on an output signal of the air flow meter. The output signal of the air flow meter (AFM signal) is sampled in synchronism with the crank angle of the internal combustion engine. With this angle-synchronous processing, the device is capable of obtaining AFM data at equal intervals within a cycle of intake air pulsation, thereby eliminating adverse effects of the intake air pulsation. The device is hence capable of reducing variations in AFM data averages and calculating average flow rates of the intake air with high precision. | 02-12-2015 |
20150082875 | System for rotationally securely plugging a sensor into a through passage of a flow channel - A system for rotationally securely plugging a sensor into a through-passage of a flow channel, the sensor including a sensor housing, the through-passage having an inner wall delimiting the through-passage and first and second inside diameters extending respectively along a first axis and a second axis, perpendicular to the first axis, the first inside diameter being greater than the second inside diameter, the plug-in direction of the sensor housing into the through-passage defining a third axis essentially perpendicular to the first and second axis, the sensor housing having a longitudinal extension area along the third axis, which has an outer wall, the sensor housing being pluggable into the through-passage. To ensure rotationally secure assembly of the sensor in its setpoint angular position, at least one protrusion projecting inwardly into the through-passage by a defined dimension is on the inner wall of the through-passage and/or at least one protrusion projecting outwardly by a defined dimension is on the outer wall of the longitudinal extension area of the sensor housing so that the sensor housing, in the plugged-in state, is rotatable in the through-passage no more than 0.5°, and in particular no more than 0.35°, about the z-axis. | 03-26-2015 |
20150096360 | AIRFLOW MEASURING DEVICE - A sensor assembly includes a sensor chip, a circuit board, and a wire holding case. The wire holding case holds a bonding wire, which connects the sensor chip with the circuit board. The wire holding case is inserted in an insertion hole of a case. The wire holding case has a low rigidity portion and a high rigidity portion in an X direction. The low rigidity portion has a space accommodating the bonding wire. The high rigidity portion has a reference surface in contact with an inner periphery of the insertion hole to position the wire holding case in a Y direction. The high rigidity portion has a surface on the opposite side of the reference surface in the Y direction. The surface is biased from a projection, which is formed on the inner periphery of the insertion hole, in the Y direction. | 04-09-2015 |
20150101402 | FLOW RATE MEASURING APPARATUS - Dust with various particle diameters entering a bypass passage, particularly, relatively large dust with a particle diameter of 100 to 200 μm or so, is reliably caused to collide with a first step-shaped part, a second step-shaped part and a plate-like member to be sufficiently decelerated and reach a flow rate detecting device with low collision energy. This can prevent the flow rate detecting device from being damaged by collision of dust. Furthermore, the placement position of the plate-like member is optimized to suppress air turbulence at a flow rate detecting part, which achieves a good balance between flow rate detection accuracy and dust tolerance. | 04-16-2015 |
20150300855 | AIR MASS FLOW SENSOR PIPE - An air mass sensor pipe ( | 10-22-2015 |
20150308392 | AIR FLOW MEASURING DEVICE - A second sensor includes a lead wire and is exposed to intake air flowing through a passage outside a housing. A conduction body is conductively-joined to the wire. A lead hole opens on an exposed surface, and the wire or the conduction body is pulled out of the passage through the hole. A predetermined terminal is conductively-joined to the wire or the conduction body which is pulled out through the hole. A mold part is provided by injection-molding from resin fluid to seal a conductively-joined part between the wire or the conduction body and the predetermined terminal. The hole is filled up with a filler material to limit leakage of intake air from the passage. A high resilient part has higher resilience than the filler material and is located between the filler material and the mold part to receive injection pressure at time of the injection-molding of the mold part. | 10-29-2015 |
20150345417 | METHOD FOR ESTIMATING VOLUMETRIC EFFICIENCY IN POWERTRAIN - A method for estimating the volumetric efficiency in an internal combustion engine in real time includes the following steps: (a) monitoring an oxygen percentage of gases in the intake manifold using an oxygen sensor coupled to an intake manifold; and (b) determining, via a control module, a volumetric efficiency of the internal combustion engine in real time based, at least in part, on the oxygen percentage of the gases in the intake manifold. | 12-03-2015 |
20150354512 | SENSOR DEVICE - A sensor device is disposed in an intake passage through which intake air flows to an internal combustion engine. The sensor device includes a humidity sensor that generates a signal according to a humidity of the intake air flowing through the intake passage. A choke portion is defined in the intake passage to decrease a cross-sectional area of the intake passage. The humidity sensor is arranged on the choke portion. | 12-10-2015 |
20150377671 | AIR FLOW METER - An air flow meter has a housing, a flow rate sensor, and a physical-quantity measuring sensor. The housing therein defines a bypass passage into which a part of air flowing in a duct flows. The flow rate sensor is disposed in the bypass passage. The physical-quantity measuring sensor measures a physical quantity of air flowing in the duct and is disposed separately from the flow rate sensor. The housing has a recessed portion that is recessed from an inner wall surface of the bypass passage and that has a blind-passage shape. The physical-quantity measuring sensor is disposed in the recessed portion. | 12-31-2015 |
20160091356 | AIR FLOW METER - An air flow meter is revealed. It comprises a flow meter body, an intake pipe embedded in a side of the flow meter body, a U-shaped guide way disposed in the flow meter body for connecting the intake pipe, and an outlet disposed at an end of the U-shaped guide way, wherein the outlet has a diameter less than a diameter of the intake pipe. | 03-31-2016 |
20160169723 | MASS AIRFLOW METER | 06-16-2016 |
20160377470 | AIR FLOW RATE MEASUREMENT DEVICE - An air flow rate measurement device includes a casing, a flow rate measurement portion, a first protrusion and a second protrusion. The casing is disposed in a main flow passage in which an air flows, and the casing defines a bypass passage therein to take in a part of the air flowing in the main flow passage. The flow rate measurement portion is housed in the casing and measures a flow rate of the air flowing in the bypass passage. The first protrusion protrudes from a side surface of the casing in the main flow passage. The second protrusion protrudes from the side surface of the casing in the main flow passage. The second protrusion is spaced from the first protrusion in a flow direction of the air in the main flow passage. The air flow rate measurement device is capable of limiting a generation of a separated vortex. | 12-29-2016 |
20180023496 | INTAKE AIR FLOW RATE MEASURING DEVICE | 01-25-2018 |
073114330 | Using pressure measurement | 13 |
20080302173 | INTAKE AIR MASS FLOW MEASUREMENT DEVICE - In an intake air mass flow measurement device, for preventing clogging in a pressure intake tube due to water or the like entering the pressure intake tube in a device measuring a pressure in the intake air tube, the intake air mass flow measurement device includes a mass air flow measurement device for measuring an intake air mass flow in an intake air tube; and a pressure sensing device for sensing pressure in the intake air tube, the pressure sensing device being integrated with the mass air flow measurement device, and an aperture plane opened to the inside of a main air flow passage for detection of the pressure takes in pressure by using a gap generated between a main air flow passage constituting member and an insertion part of the mass air flow measurement device when a measurement part of the mass air flow measurement device is inserted into the main air flow passage. With this construction, it is possible to provide a structure in which water or the like can hardly clog the pressure intake port. | 12-11-2008 |
20090044611 | Control apparatus and control method for internal combustion engine - A control apparatus for an internal combustion engine provided with a fuel supply mechanism capable of adjusting a fuel supply amount includes a flow rate sensor that detects an intake air flow rate that represents a flow rate of air admitted into a combustion chamber of the internal combustion engine, a pressure sensor that detects a pressure of the air admitted into the combustion chamber of the internal combustion engine, a characteristic change estimation unit that estimates a characteristic change of the internal combustion engine in accordance with the intake air flow rate detected by the flow rate sensor and the intake air pressure detected by the pressure sensor, and a fuel supply mechanism control unit that controls the fuel supply mechanism. The fuel supply mechanism control unit controls the fuel supply mechanism such that the characteristic change in the internal combustion engine is compensated in accordance with an estimation performed by the characteristic change estimation unit. | 02-19-2009 |
20100031737 | MASS AIR FLOW MEASUREMENT DEVICE - An arrangement of a mass intake air flow measurement device suitable for integrating a humidity sensing device as well as a temperature sensing device and a pressure sensing device is provided. A second bypass passage | 02-11-2010 |
20100154523 | Throttle upstream pressure estimating apparatus and cylinder charged air quantity calculating apparatus for internal combustion engine - In a non-critical pressure region where a pressure ratio [Pm/Pthrup(i−1)] of an intake air pressure Pm (throttle downstream pressure) detected by an intake air pressure sensor to a previous throttle upstream pressure Pthrup(i−1) is greater than a predetermined value B, the previous throttle upstream pressure Pthrup(i−1) is substituted for one of two terms of the throttle upstream pressures Pthrup(i) included in an intake system model so that present throttle upstream pressure Pthrup(i) is calculated. In a critical pressure region where the pressure ratio is less than or equal to the predetermined value B, a physical value f(Pm/Pthrup(i)) using a pressure ratio [Pm/Pthrup(i)] of the intake air pressure Pm to a present throttle upstream pressure Pthrup(i) as a parameter is regarded as a steady value fc so that the present throttle upstream pressure Pthrup(i) is calculated. | 06-24-2010 |
20110000288 | METHOD FOR DIAGNOSING A SENSOR UNIT OF AN INTERNAL COMBUSTION ENGINE - A method for diagnosing a sensor unit of an internal combustion engine, in which an output signal of the sensor unit is compared to a setpoint value which is specified independently from the output signal. The setpoint value relates to a periodic characteristic, and the variation over time of the value of the output signal of the sensor unit or a variable which is derived from the value variation over time is analyzed with regard to this periodic characteristic. | 01-06-2011 |
20120079879 | Mass Air Flow Measurement Device - An arrangement of a mass intake air flow measurement device suitable for integrating a humidity sensing device as well as a temperature sensing device and a pressure sensing device is provided. A second bypass passage | 04-05-2012 |
20120198925 | Sensor Structure - In relation to a humidity sensor sensitive to water and contamination, a sensor implementation structure that achieves both protection performance against water and contaminants and measurement performance such as humidity responsiveness is provided. A sensor structure has a mass airflow measurement element that measures a mass airflow flowing in an intake pipe, a humidity sensing element that senses humidity of air flowing in the intake pipe, a housing structural component having a connector that carries out input/output to/from outside and a terminal component of the connector, and a bypass passage that is composed by using part of the housing structural component and takes in part of the air that flows in the intake pipe, the mass airflow measurement element being mounted in the bypass passage; wherein space is provided in the housing structural component in the vicinity of the bypass passage, the humidity sensing element is mounted in the space. | 08-09-2012 |
20130036806 | AIR FLOW MEASURING DEVICE - An air flow measuring device includes a housing, flow sensor, and a humidity sensor. The housing defines a bypass flow passage through which intake it passes. A part of intake air is taken into the bypass flow passage to pass through the bypass flow passage. The flow sensor includes a sensing part disposed in the bypass flow passage, and produces a signal which is in accordance with the flow rate of intake air as a result of heat transfer between intake air taken into the bypass flow passage and the sensing part. The humidity sensor includes a sensing part exposed to the intake passage, and projects from an outer wall of the housing into the intake passage. The humidity sensor produces a signal which is in accordance with humidity of intake ail flowing through the intake passage. | 02-14-2013 |
20130228006 | METHOD AND DEVICE FOR DIAGNOSING CRANKCASE VENTILATION OF INTERNAL COMBUSTION ENGINES - A method for checking the functioning of a ventilation apparatus for ventilating a crankcase connected via the ventilation apparatus to an air supply system of the internal combustion engine includes: determining a pressure difference between an ambient pressure and a crankcase pressure in the crankcase; identifying a fault in the ventilating apparatus as a function of the pressure difference if an enabling condition is met; the enabling condition being met if an air mass flow in the air supply system, filtered by a low-pass filter, exceeds a first threshold value in terms of absolute value. | 09-05-2013 |
20140283587 | Air Velocity Apparatus and System - An apparatus and a system is provided that may be utilized to determine air flow through an air filter and/or a plurality of air filters. The present invention utilizes a demonstration apparatus to illustrate the differences in air flow and air restriction between a plurality of different air filters and filtration media. The apparatus and system utilizes a common plenum which subjects the plurality of air filters to the same differential pressure. The air flows through a first side of the air filter and is measured on the second side of the air filter by utilizing a wind meter or similar device to gauge the amount of air flow velocity of the second side of the filter. Additionally, the apparatus and system utilizes a display means to illustrate the differing air velocity through the second side of the air filter. | 09-25-2014 |
20140366614 | Sensor for Detecting the Mass Flow Rate and the Temperature of a Fluid Flow - A sensor for detecting the mass flow rate and the temperature of a fluid flow has a mass flow rate sensor having a mass flow rate sensor element, a temperature sensor having a temperature sensor element, and an interface for power supply. The sensor converts the measured values detected in analog by the mass flow rate sensor element and the temperature sensor element into digital output signals. In order to specify the simplest and most economical sensor possible for detecting the mass flow rate and the temperature of a fluid flow, at least one analog/digital converter is arranged in the sensor, which analog/digital converter converts the analog measured values of the mass flow rate sensor element and/or the analog measured value of the temperature sensor element into digital output signals and provides the digital output signals at a single digital interface. | 12-18-2014 |
20160097661 | FLOW RATE MEASUREMENT DEVICE - An environment sensor is mounted on a second surface of a circuit board that does not have a wire bonding pad, and is arranged in a measuring chamber that is disposed in a circuit board receiving portion. The measuring chamber has a communication port for communication with a main passage. According to this configuration, process addition attributable to integration between a flow rate measurement device and the environment sensor is not required. The environment sensor does not affect air flow in a bypass passage, and thus detection accuracy of a flow rate detection element that is arranged in the bypass passage does not decline. | 04-07-2016 |
20160116320 | MASS AIRFLOW SENSOR FOR INTERNAL COMBUSTION ENGINES - A mass airflow measuring device includes an air passageway defined in a duct. A first channel communicates with the air passageway via at least one first aperture to allow air flowing through the air passageway to enter the first channel. A second channel is located downstream from the first channel. A sample channel communicates the first channel with the second channel. A mass airflow sensor is located in the sample channel and is adapted to receive air flowing in the sample channel. The sample channel is defined in a housing which has a chamber adapted to accommodate one of a variety of differently configured mass airflow sensors. The sensor is adapted to output an airflow signal based on air flowing past the sensor. A processing unit communicates with the sensor and is adapted to receive the airflow signal from the sensor. | 04-28-2016 |
073114340 | Using thermal measurement | 24 |
20080196487 | Intake Air Amount Calculating System and Method of Internal Combustion Engine - When it is predicted that an engine is going to be started in the near future, a heater portion of an air flow meter is energized so as to be heated in advance. Prior to the pre-heating, an intake air temperature is sensed by a temperature sensing portion of the air flow meter. After completion of start-up of an intake air temperature sensor, a difference between the intake air temperature sensed by the intake air temperature sensor and the previously sensed intake air temperature is obtained. When the difference is above a predetermined value, it is judged that the intake air temperature sensor or the air flow meter is in an abnormal condition. | 08-21-2008 |
20080264154 | FLOW QUANTITY MEASURING DEVICE - In a flow quantity measuring device, each of upstream side and downstream side sensing resistors, which are placed on an upstream side and a downstream side, respectively, of a heating resistor, includes resistor elements, each of which forms a folded path. The folded path has a generally constant width along an entire extent thereof and is returned at each of first and second longitudinal end edges of a sensing area. The heating resistor forms a folded path, which has a generally constant width along an entire extent thereof and is returned at the second longitudinal end edge of the heat generating area. First and second ends of the folded path of the heating resistor projects beyond the first longitudinal end edge of the sensing area on a first side of the flow quantity measuring device. | 10-30-2008 |
20090078033 | DIAGNOSTIC DEVICE AND METHOD FOR AN INTAKE AIR TEMPERATURE SENSOR OF AN INTERNAL COMBUSTION ENGINE - An abnormality diagnostic device diagnoses the presence/absence of abnormality of an intake air temperature sensor ( | 03-26-2009 |
20090235725 | INTAKE AIR TEMPERATURE SENSOR DIAGNOSTIC SYSTEM AND METHOD - An intake air temperature (IAT) sensor diagnostic system may include an IAT determination module, a mass air flow (MAF) module, and a diagnostic module. The IAT determination module determines a measured IAT based on an IAT sensor. The MAF module determines a reference temperature based on a MAF sensor. The diagnostic module determines faults in the IAT sensor based on a comparison between the reference temperature and the measured IAT. | 09-24-2009 |
20100294029 | Device for measuring flowing media - An apparatus for determining at least one parameter of a medium flowing in a main flow direction, in particular of an intake air mass of an internal combustion engine, is proposed. The apparatus has a plug-in part that is introducible into the flowing medium with a predetermined alignment with respect to the main flow direction, having at least one inlet opening and at least one outlet opening as well as at least one main channel connecting the two openings. Also provided is at least one measurement channel that branches off from the main channel, having at least one sensor element, received in the measurement channel, for determining the at least one parameter. At least one directing surface, which diverts the flow of the medium from the measurement channel, is provided before a branching point of the measurement channel from the main channel. The directing surface is disposed at least in part at an angle α different from 90° with respect to a plane that is spanned by the main flow direction and the longitudinal extension axis. | 11-25-2010 |
20110000289 | PLUG-IN SENSOR HAVING AN OPTIMIZED FLOW OUTLET - A plug-in sensor is provided which is suitable for determining at least one parameter of a fluid medium flowing in a main flow direction, especially of an intake air mass of an internal combustion engine flowing through a flow pipe. The plug-in sensor has a plug part that is able to be mounted in the flowing fluid medium, in a specified alignment to the main flow direction. In the plug part, at least one flow channel is provided having at least one inlet opening and at least one outlet opening, in the at least one flow channel at least one sensor is accommodated for determining the at least one parameter. The plug part has a profile at which at least one local pressure minimum sets in the flowing fluid medium. The at least one outlet opening is situated at the side of the plug part, in the region of the at least one pressure minimum. | 01-06-2011 |
20110072894 | Sensor Structure - The present invention utilizes self-heating of electronic components to improve a humidity sensing part with low environment resistance, such as a condensation problem and the like, and also to enhance the heat radiation efficiency of electronic components. The humidity sensing part is used in an intake tube of an automobile by integrating, for example, with a heating resister type mass air flow measurement device. A humidity sensing element is mounted on an electronic circuit board in a mass air flow measurement device with the temperature thereof starting to increase immediately after a sensor has been actuated. This urges the temperature of the humidity sensing element to start increasing (being heated) immediately after the sensor has been actuated. To urge the humidity sensing element to be further heated, a base plate is composed of two types of materials, resin and metal. A part of the base plate holding an area of the electronic circuit board generating a large quantity of heat is composed of the metal. A part of the base plate corresponding to the periphery of the humidity sensing part which is to be heated is composed of the resin. | 03-31-2011 |
20110072895 | Flow-Rate Measurement Apparatus - A plate-shaped board is arranged so that fluid passages are respectively formed at a sensor-element mounting surface side of the plate-shaped board and at a backside surface side thereof being opposed to the sensor-element mounting surface side, a curved passage portion is provided which is located upstream of the plate-shaped board and changes its direction so as to form a curved line, and the curved passage portion has an outer-side wall surface including a sloping portion that slopes so that, of two edge portions of the outer-side wall surface in a direction perpendicular to board surfaces of the plate-shaped board, the edge portion located on a sidewall surface, facing the sensor-element mounting surface, of the curved passage portion is positioned closer to an inner wall surface of the curved passage portion than the edge portion located on a sidewall surface opposed to the first sidewall surface, along the sidewall surfaces. | 03-31-2011 |
20120111100 | DETERIORATION DETERMINATION APPARATUS FOR AIRFLOW METER AND DETERIORATION DETERMINATION METHOD - When a deterioration determination apparatus determines a degree of deterioration in characteristics of an airflow meter, a driving condition of an engine is maintained at a specified condition in which intake air flow rate is greater than a specified value. A measurement error of the airflow meter is computed based on an intake air flow rate measured with the airflow meter. The degree of deterioration due to stain is determined based on the measurement error. | 05-10-2012 |
20130055801 | AIR FLOW RATE MEASURING APPARATUS - An air flow rate measuring apparatus includes a heater and a control circuit. The heater heats a part of an intake air sucked into an engine. The control circuit controls an energization of the heater. The heater has a measuring-mode temperature when a flow rate of the intake air is measured. The control circuit has a heat cleaner which temporarily raises a temperature of the heater higher than the measuring-mode temperature when an energization of the air flow rate measuring apparatus is started. | 03-07-2013 |
20130152675 | Thermal Fluid Flow Rate Measurement Device - Provided is a thermal fluid flow rate measurement device that inhibits the thermal fluid flow rate measurement device and peripheral parts from thermally affecting an intake air temperature detection element and measures an intake air temperature with high accuracy. The thermal fluid flow rate measurement device includes an auxiliary passage | 06-20-2013 |
20130167626 | FLOW RATE DETECTION DEVICE - A flow rate detection device of the invention comprises a flow rate meter 11 for outputting an output value Vd depending on a gas flow rate and detects the gas flow rate by calculating the gas flow rate on the basis of the output value output from the flow rate meter. In this invention, it is judged if the output value output from the flow rate meter should be corrected on the basis of the flow rate of the gas passing through the flow rate meter and its change rate. When it is judged that the output value output from the flow rate meter should be corrected, the output value output from the flow rate meter is corrected and then, the gas flow rate is calculated on the basis of this corrected output value. | 07-04-2013 |
20130199280 | Thermal Flow Meter - An object of the present invention is to provide a thermal type flow rate sensor that offers high sensitivity and improved reliability. A sensor element according to the present invention includes a semiconductor substrate, a cavity portion formed on the semiconductor substrate, a heating resistor formed on the cavity portion via an electrically insulating film, a heating temperature sensor for detecting heating temperature of the heating resistor, and a driving circuit for controlling the heating temperature of the heating resistor using the temperature detected by the heating temperature sensor. The heating temperature sensor comprises temperature-sensitive resistors having resistance values varying according to temperature and disposed upstream and downstream of a direction of flow of a fluid to be measured relative to the heating resistor and on upper and lower sides in a direction perpendicular to the direction of flow of the fluid to be measured relative to the heating resistor. | 08-08-2013 |
20130283895 | Sensor device for detecting a flow property of a fluid medium - A sensor device for detecting at least one flow property of a fluid medium, including at least one sensor housing, in which at least one electronic module having at least one flow sensor for detecting the flow property is accommodated. At least one pressure sensor and at least one humidity sensor are accommodated inside the sensor housing, at least the pressure sensor and optionally also the humidity sensor is situated inside the sensor housing independently of the electronic module. | 10-31-2013 |
20150040653 | SENSOR DEVICE FOR DETERMINING AT LEAST ONE PARAMETER OF A FLUID MEDIUM FLOWING THROUGH A DUCT - A sensor device for determining at least one parameter of a fluid medium flowing through a duct, e.g., an intake air mass flow of an internal combustion engine, includes: a sensor housing, e.g., a sensor plug that is placed or that can be placed into a flow tube, in which the duct is fashioned; and at least one sensor chip situated in the duct for determining the parameter of the fluid medium. The sensor chip has a sensor area. The sensor housing has an inlet into the duct that is oriented opposite a main direction of flow of the fluid medium, and has at least one outlet from the duct. The sensor area is covered at least partly by an electrically conductive layer. | 02-12-2015 |
20150114098 | AIRFLOW MEASURING DEVICE - A housing defines a bypass passage and a sub-bypass passage. The bypass passage draws a part of air flowing through an interior of a duct. The sub-bypass passage is branched from the bypass passage to draw a part of air flowing through the bypass passage. A flow sensor is equipped in the sub-bypass passage to cause heat transfer with air, which passes through the sub-bypass passage, and to generate an electric signal according to a flow quantity of air in the duct. An intake-air temperature sensor is configured to measure a temperature in the duct. A moisture sensor is configured to measure a humidity in the duct. The flow sensor and the multiple sensors are equipped in the sub-bypass passage and are located along a direction of flow of air in the sub-bypass passage. | 04-30-2015 |
20150300857 | Thermal Air Flow Sensor - A thermal air flow sensor that offers high flow rate measurement accuracy is provided. The thermal air flow sensor includes a measuring element. The measuring element includes: a semiconductor substrate; a heating resistor and a temperature measuring resistor both formed as a result of thin films being stacked over the semiconductor substrate; an electronic insulator including a silicon oxide film; and a diaphragm portion formed after part of the semiconductor substrate is removed. The heating resistor and the temperature measuring resistor are formed over the diaphragm portion. In the thermal air flow sensor, a ratio of an area occupied by the thin films to an area of the measuring element ranges between 40% and 60%. | 10-22-2015 |
20150330324 | FLOW MEASURING DEVICE - A detection element portion is provided on an inner surface side of a plate as a wall surface portion defining a measurement passage in a flow measuring device. An intake-air temperature detection portion detecting a temperature of a fluid being measured is provided on one main surface of a substrate forming the detection element portion. A ventilation hole allowing a main passage in which the fluid being measured flows and the measurement passage to communicate is provided so as to penetrate through the plate. By achieving a state in which the substrate forming the detection element portion is installed so that an end thereof protrudes into the ventilation hole and a back surface of the end portion of the detection element portion where the intake-air temperature detection portion is formed is exposed toward the main passage, a response speed is enhanced. | 11-19-2015 |
20150355005 | AIR FLOW MEASURING DEVICE - A high-temperature resistance is disposed in an internal passage and has its energization controlled based on an intake-air flow rate in the passage to increase/decrease a heat generation amount. A first low-temperature resistance constitutes a bridge circuit which has its energization state changed according to the heat generation amount of the high-temperature resistance. The first low-temperature resistance varies its resistance value according to intake-air temperature. A second low-temperature resistance is an element, which is not incorporated into the bridge circuit and varies its resistance value according to intake-air temperature to increase/decrease an energization amount. The second low-temperature resistance is provided on a substrate. Another bridge circuit produces an intake air amount detection signal using an electrical signal generated by operation of the high-temperature resistance and the first low-temperature resistance. A digital circuit uses an electrical signal produced by the second low-temperature resistance as an intake temperature detection signal. | 12-10-2015 |
20160011031 | Hot-Type Fluid Measurement Device | 01-14-2016 |
20160025538 | FLOWMETER SYSTEM - In one example embodiment, there is provided a flowmeter system. The flowmeter system includes a high temperature transferring part that collects external heat energy to transfer the heat energy; a low temperature transferring part that transfers heat energy of an intake pipe; a stirling engine that produces a power based on a temperature difference between the heat energy transferred from the high temperature transferring part and the heat energy transferred from the low temperature transferring part; and a flowmeter that is supplied with the power produced by the stirling engine to measure a flow rate of the intake pipe | 01-28-2016 |
20160146651 | Physical Quantity Measuring Device - Provided is a physical quantity measuring device for reducing the influence of heat, other than the heat of a gas to be measured, on a measuring unit for measuring a physical quantity of the gas to be measured. The physical quantity measuring device according to the present invention includes a chip package | 05-26-2016 |
20160161313 | AIRFLOW METER - An airflow meter includes a flow rate sensor for measuring a flow rate of intake air sucked into an engine, a humidity sensor that outputs an intake air humidity signal in accordance with humidity of the intake air, an intake air temperature sensor that outputs an intake air temperature signal in accordance with temperature of the intake air, and a humidity correction section that corrects the intake air humidity signal based on the intake air temperature signal. | 06-09-2016 |
20160202099 | Air Mass Flow Meter | 07-14-2016 |
073114350 | Using a vortex | 1 |
20120324990 | SENSOR SYSTEM FOR DETERMINING AT LEAST ONE FLOW PROPERTY OF A FLUID MEDIUM FLOWING IN A MAIN FLOW DIRECTION - A sensor system for determining a parameter of a fluid medium, e.g., an intake air mass flowing through a channel, includes at least one sensor chip situated in the channel for determining the parameter, which sensor chip is accommodated in a sensor carrier which (i) protrudes into the channel and (ii) has a leading edge situated transverse to the flow of the fluid medium. At least one vortex generator is provided, at least in the region of the leading edge, and configured for forming secondary flows in the flowing fluid medium in the region of the sensor carrier, for avoiding or reducing the entry of particles. The secondary flows extend in a plane essentially perpendicular to the main flow direction of the fluid medium, e.g., facing away from the sensor area. | 12-27-2012 |