| Class / Patent application number | Description | Number of patent applications / Date published |
|---|
| 073230320 | Air-fuel ratio | 66 |
| 20080314117 | GAS SENSOR WITH IMPROVED SEALING STRUCTURE AND METHOD OF MANUFACTURING THE SAME - In a gas sensor, a seal member is filled in an annular space disposed between abutted inward and outward shoulder portions of a housing and a sensor member and an one open end of the housing. A tubular insulator is installed in the annular space to be mounted at its first end surface on the seal member. A ring member is installed in the annular space to be mounted at its first end surface on a second end surface of the tubular insulator. The one open end of the housing is configured to be inwardly crimped such that an edge of an inner circumference of the inwardly crimped one open end of the housing digs in a second end surface of the ring member to thereby fixedly press the seal member, the insulator, and the ring member to the abutted inward and outward shoulder portions. | 12-25-2008 |
| 20090056414 | DEGRADATION SIMULATOR FOR GAS SENSOR - The degradation simulator is used for a gas sensor including a sensor element having a solid electrolyte layer and a pair of electrodes located opposite to each other across from the solid electrolyte layer, the sensor element outputting a sensor output signal having a value depending on concentration of a specific gas in the ambient gas. The degradation simulator includes a first setting function of enabling variably setting a time constant delay which appears on the sensor output signal when concentration of the specific gas changes, a second setting function of enabling variably setting a dead time delay which appears on the sensor output signal when concentration of the specific gas changes, and an adding function of adding at least one of the time constant delay and dead time delay to the sensor output signal in order to generate a pseudo-degraded sensor output signal in accordance with an external instruction. | 03-05-2009 |
| 20090095052 | SENSOR CONTROL DEVICE AND AIR FUEL RATIO DETECTING APPARATUS - A gas sensor apparatus | 04-16-2009 |
| 20090260419 | CONTROL APPARATUS FOR INTERNAL COMBUSTION ENGINE - The control apparatus for the internal combustion engine includes: a unit for detecting the change in the alcohol concentration of a fuel supplied to the internal combustion engine including a plurality of cylinders; a unit for detecting an air-fuel ratio variation between the plurality of cylinders; a unit for making the failure diagnosis when the air-fuel ratio variation between the plurality of cylinders exceeds a predetermined threshold value; and a unit for inhibiting the failure diagnosis executed based on the air-fuel ratio variation between the plurality of cylinders when the change in the alcohol concentration is detected. | 10-22-2009 |
| 20090266142 | Systems and Methods for Sensing an Ammonia Concentration in Exhaust Gases - Systems and methods for determining an NH | 10-29-2009 |
| 20100031731 | SIGNAL PROCESSOR FOR GAS SENSOR - The present invention provides, as one aspect, a signal processor for a gas sensor that is disposed in an exhaust passage of an internal combustion engine and senses concentration of a specific component in exhaust gas. The signal processor includes a calculation unit that performs moderation operation at every instant for a sensor output of the gas sensor, an evaluation unit that evaluates a degree of pressure variation impact on the sensor output caused in the exhaust passage, and a change unit that changes a mode of the moderation operation according to a result of the evaluation by the evaluation unit. | 02-11-2010 |
| 20100101303 | GAS CONCENTRATION DETECTION APPARATUS - It is an object of the present invention to provide a gas concentration detection apparatus that is capable of forming an accurate activity judgment when a gas concentration detection cell begins to detect gas concentration with high accuracy. When warm-up begins at time t | 04-29-2010 |
| 20100154509 | METHOD FOR DETERMINING AIR FUEL RATIO OF INTERNAL COMBUSTION ENGINE ON THE BASIS OF ION CURRENT - In a method for determining an air fuel ratio of an internal combustion engine on the basis of an ion current, for detecting an ion current generated per ignition within a combustion chamber of the internal combustion engine, the method measures a generation period in which the ion current is greater than a determination value set as long as the ion current is generated, computes a divisor for computing a rate of fluctuation of the generation period of the ion current on the basis of a plurality of measured generation periods, computes the rate of fluctuation of the generation period of the ion current by weighing in a direction of increasing the computed divisor, and determines that an air fuel ratio is excessively high in the case that the calculated rate of fluctuation is equal to or more than a predetermined value. | 06-24-2010 |
| 20100263434 | GAS SENSOR - A gas sensor extending along an axial direction, the gas sensor including: a housing having a through hole, the through hole including an expanding portion at a leading end thereof; a gas sensing element inserted into the housing, having a closed leading end, and provided with a sensor electrode on an outer surface of the leading end side thereof; a heater inserted into the gas sensor, and including a contact portion where the heater contacts an inner surface; an protector fixed on the leading end side of the housing and having an outer protector including an outer air hole and an inner protector being positioned within the outer protector and spaced apart from the outer protector in the radial direction; and an inner air vent provided between the inner protector and the leading end of the housing. | 10-21-2010 |
| 20120055231 | METHOD FOR DETERMINING A DELAY TIME OF A PRE-CATALYTIC CONVERTER LAMBDA PROBE AND METHOD FOR DETERMINING THE OXYGEN STORAGE CAPACITY OF AN OXYGEN STORE - The output signal of a pre-catalytic converter lambda probe and the output signal of a controller are used to determine an inherent delay time of the pre-catalytic converter lambda probe, for example due to aging of the probe, by measuring, for example, the separation between maxima in these output signals. The pre-catalytic converter lambda probe is installed in an exhaust gas system of an arrangement wherein an internal combustion engine operated under controlled conditions. The determined delay time can be used to determine the oxygen storage capacity of an oxygen store associated with a catalytic converter in the arrangement by determining with the pre-catalytic converter lambda probe the start of a time interval over which integration takes place, and determining the actual end time of the integration by adding the delay time to an end time determined from an output signal of the post-catalytic converter lambda probe. | 03-08-2012 |
| 20120073356 | AIR-FUEL RATIO SENSOR - An air-fuel ratio sensor includes a solid electrolyte layer, a measuring electrode laminated on a first face of the solid electrolyte layer, a reference electrode laminated on a second face of the solid electrolyte layer which is different from the first face thereof, such that the reference electrode and the measuring electrode are opposed to each other with the solid electrolyte layer interposed therebetween, a porous diffusion resistance layer that permits gas to pass therethrough and covers the measuring electrode, and a catalyst layer including a catalyst metal and a base material on which the catalyst metal is supported. The catalyst layer permits gas to pass therethrough and covers the porous diffusion resistance layer. The catalyst metal is a platinum-palladium-rhodium alloy, and contains 2 to 9 mass % of rhodium when the overall amount of the catalyst layer is represented as 100 mass %. | 03-29-2012 |
| 20130104626 | SYSTEM AND METHOD FOR DIAGNOSING FAULTS IN AN OXYGEN SENSOR | 05-02-2013 |
| 20130133401 | APPARATUS AND METHOD FOR DETECTING ABNORMALITY OF IMBALANCE OF AIR-FUEL RATIOS AMONG CYLINDERS - A detecting apparatus that detects an abnormality of imbalance of air-fuel ratios among cylinders of a multi-cylinder internal combustion engine, which is equipped with a variable working angle mechanism of an intake valve, the detecting apparatus includes an abnormality detection portion that detects a parameter regarding rotational fluctuations of each of the cylinders and detects whether or not there is an abnormality of imbalance of air-fuel ratios among the cylinders. The abnormality detection portion refrains from determining that the air-fuel ratios are normal when the working angle at the time of detection of the parameter is within a predetermined large working angle range, and determines that the air-fuel ratios are normal when the working angle at the time of detection of the parameter is within a predetermined small working angle range that is on a small working angle side with respect to the large working angle range. | 05-30-2013 |
| 20140007651 | METHOD AND DEVICE FOR DETERMINING A LAMBDA AIR RATIO USING A GAS SENSOR - A method for determining a lambda air ratio using a gas sensor having a ceramic measuring element, an output voltage of the gas sensor changing abruptly if lambda is changed in the range around lambda=1 and the gas sensor having an initial inverse voltage which is dependent on the temperature of the gas sensor. A threshold value for the initial inverse voltage is established for a limit between a lambda value below and above 1 as a function of the temperature of the gas sensor. Also described is a device for implementing the method. The method and the device make it possible to operate gas sensors having a ceramic measuring element at an even lower temperature than according to the related art and thus reduce the period between the start of an internal combustion engine and the operational readiness of a lambda regulation. This makes it possible to reduce the fuel consumption as well as the emission of undesirable components of the exhaust gas. | 01-09-2014 |
| 20140144209 | VAPOUR MEASUREMENT - The present invention provides, with reference to FIG. | 05-29-2014 |
| 20140298889 | APPARATUS FOR DETECTING VARIATION ABNORMALITY IN AIR-FUEL RATIO BETWEEN CYLINDERS - An apparatus for detecting a variation abnormality in an air-fuel ratio between cylinders according to the present invention is configured to calculate a value representing a change in an air-fuel ratio based on an output of an air-fuel ratio sensor that is provided in an exhaust passage in a predetermined operating state in which fuel is injected from a fuel injection valve, perform, to the calculated value, sensitivity correction in accordance with a sensitivity of the sensor based on the output of the sensor during fuel-cut operation and outside atmospheric pressure correction based on outside atmospheric pressure, and determine the presence or absence of a variation abnormality in an air-fuel ratio between cylinders by comparing the corrected value with a predetermined value. | 10-09-2014 |
| 20150040642 | SENSOR ELEMENT AND SENSOR - Disclosed is a sensor element for detecting a specific gas component in a gas under measurement. The sensor element is plate-shaped in a longitudinal direction thereof and has a detection portion located on a front end side of the sensor element and an air introduction portion adapted as a longitudinal hole extending in the longitudinal direction to a position of the detection portion so as to introduce air thereinto. The detection portion includes a measurement electrode exposed to the gas under measurement, a reference electrode arranged in the air introduction portion and a plate-shaped solid electrolyte member held in contact with the measurement electrode and the reference electrode. The air introduction portion has a cross section with an aspect ratio of 0.0082 to 0.0800 and an area of 0.015 to 0.147 mm | 02-12-2015 |
| 20150068278 | LOAD DRIVE APPARATUS AND SENSOR CONTROL APPARATUS - A load drive apparatus ( | 03-12-2015 |
| 20150114085 | GAS SENSOR ELEMENT, GAS SENSOR, AND METHOD OF MANUFACTURING GAS SENSOR ELEMENT - A gas sensor element has a protection layer smaller in heat capacity than a conventional protection layer formed by a dipping process. A gas sensor includes the gas sensor element. The gas sensor element is manufactured by a method of manufacturing. The gas sensor element includes at least one space formed between a protection layer and an element body. The space is positioned over at least one of four vertexes of a forward end of the element body at a location at which the thickness of the protection layer is likely to become small. Therefore, it is possible to restrain breakage of the vertexes of the forward end of the element body which could otherwise result from thermal shock stemming from adhesion of water. The protection layer of the gas sensor element can be reduced in thickness and thus in heat capacity as compared with a conventional protection layer. | 04-30-2015 |
| 20150323481 | Stoichiometric Air To Fuel Ratio Sensor System - A sensor system ( | 11-12-2015 |
| 20160003710 | DETECTION OF AIR-FUEL RATIO RICH-LEAN IMBALANCE USING AN OXYGEN SENSOR - A system and method for detecting air-fuel ratio rich-lean imbalance in an automotive engine cylinder is provided. The system and the method are configured to receive an oxygen sensor voltage of an oxygen sensor. They also include filtering the oxygen sensor voltage to create a filtered oxygen sensor voltage. An engine speed and load are determined, and an air-fuel ratio imbalance detection threshold is determined based on the engine speed and the engine load. A rich-lean imbalance status is determined, the rich-lean imbalance status being non-normal if any portion of the filtered oxygen sensor voltage exceeds the air-fuel ratio imbalance detection threshold, and the rich-lean imbalance status being normal if none of the filtered oxygen sensor voltage exceeds the air-fuel ratio imbalance detection threshold. An engine control unit having several control logics to execute similar steps is also provided. | 01-07-2016 |
| 20160109422 | METHODS AND SYSTEMS FOR OPERATING A VARIABLE VOLTAGE OXYGEN SENSOR - Methods and systems are provided for adjusting a rate of change in a reference voltage of an oxygen sensor. In one example, a method may include gradually increasing a reference voltage of an oxygen sensor from a lower first voltage to a higher second voltage at a ramp rate. The ramp rate may be based on engine operating conditions. | 04-21-2016 |
| 20160202226 | SENSOR | 07-14-2016 |
| 073230330 | Solid content | 43 |
| 20080264146 | Sensor Element for Particle Sensors and Method for Operating Same - A sensor element for gas sensors for determining the concentration of particles in gas mixtures, especially soot sensors, having at least one measuring device exposed to the gas to be determined, at least one heating element integrated into the sensor element and at least one temperature measurement element integrated into the sensor element, the heating element being situated within the sensor element spatially between the measuring device and the temperature measurement element. | 10-30-2008 |
| 20090000352 | GAS SENSING ELEMENT WITH INCREASED MECHANICAL STRENGTH - A gas sensing element for detecting a specified gas concentration in measuring gases is disclosed. The gas sensing element has at least a surface layer portion formed with an alumina composite sintered body having a principal component of alumina. The alumina composite sintered body contains alumina particles and dispersion particles, dispersed in a boundary between the alumina particles or in the alumina particles, which have an average particle diameter smaller than that of the alumina particles. The dispersion particles have particle-to-particle distances with an average of 4 μm or less and a standard deviation of 1.8 or less. The dispersion particles have particle diameters with an average of 0.2 μm or less and a standard deviation of 0.05 or less. | 01-01-2009 |
| 20090013758 | PROCEDURE FOR OPERATING A PARTICLE SENSOR THAT IS ARRANGED DOWNSTREAM AFTER A PARTICLE FILTER AND DEVICE FOR IMPLEMENTING THIS PROCEDURE - A procedure for operating a particle sensor that is arranged downstream after a particle filter, at which an ash contamination can occur, and a device for implementing the procedure, are suggested. A remaining operating time determination determines the remaining operating time of the particle sensor related to an ash contamination. Alternatively or additionally the remaining operating time determination provides a correction signal, with which the sensitivity loss of the particle sensor caused by the ash contamination can be considered. | 01-15-2009 |
| 20090019918 | PROCEDURE FOR OPERATING A COLLECTING PARTICLE SENSOR AND DEVICE FOR IMPLEMENTING THIS PROCEDURE - A procedure for operating a collecting particle sensor, which is provided with measuring phases, during which particles that are contained in an off-gas stream accumulate on a measuring route, and a device for implementing this procedure are submitted. Protection phases are provided, during which at least one measure for diminishing the accumulation of particles on the measuring route is adopted. The measure according to this invention prevents a decrease of the sensitivity of the particle sensor over a long period of time. | 01-22-2009 |
| 20100126248 | RIGID PARTICULATE MATTER SENSOR - A sensor to detect particulate matter. The sensor includes a first rigid tube, a second rigid tube, a detection surface electrode, and a bias surface electrode. The second rigid tube is mounted substantially parallel to the first rigid tube. The detection surface electrode is disposed on an outer surface of the first rigid tube. The detection surface electrode is disposed to face the second rigid tube. The bias surface electrode is disposed on an outer surface of the second rigid tube. The bias surface electrode is disposed to face the detection surface electrode on the first rigid tube. An air gap exists between the detection surface electrode and the bias surface electrode to allow particulate matter within an exhaust stream to flow between the detection and bias surface electrodes. | 05-27-2010 |
| 20100269567 | METHOD AND DEVICES OF DETECTING ACCUMULATION AMOUNT OF PARTICULATES - It is used a filter trapping particulates from a gas containing the particulates, a container | 10-28-2010 |
| 20110011154 | METHOD FOR THE ON-BOARD FUNCTIONAL DIAGNOSIS OF A SOOT SENSOR IN A MOTOR VEHICLE AND/OR FOR THE DETECTION OF FURTHER CONSTITUENTS IN THE SOOT - A method for on-vehicle functional diagnosis of a soot sensor and/or for detecting further components in the soot in a motor vehicle having an internal combustion engine, the soot sensor connected electrically to an evaluation circuit. To specify a method for functional diagnosis of a soot sensor and/or for detecting further components in the soot, by which it is possible to detect a faulty soot sensor and/or further components in the soot in an economical manner, the evaluation circuit measures a temperature coefficient of the soot sensor and detects the faultiness of the soot sensor and/or the presence of further components in the soot from the temperature coefficient of the soot sensor. | 01-20-2011 |
| 20110088450 | Method For Evaluating the State of A Soot Sensor In A Motor Vehicle - A method for performing on-board functional diagnostics on a soot sensor of a vehicle and/or for detecting further components in the soot in a motor vehicle having an internal combustion engine. The soot sensor is electrically connected to an evaluation circuit with is permanently installed in the motor vehicle. In order to specify a method for performing functional diagnostics on a soot sensor and/or for detecting further components in the soot, with which method it is possible to detect a faulty soot sensor and/or further components in the soot in a cost-effective way, the evaluation circuit measures the temperature coefficient of the soot sensor and detects the defectiveness of the soot sensor and/or the presence of further components in the soot on the basis of the temperature coefficient of the soot sensor. | 04-21-2011 |
| 20110107815 | Method and System for Diagnostics of a Particulate Matter Sensor - A diagnostic method and system is described for diagnosing an operating condition of a conductive particulate matter sensor. The sensor has a substrate and two electrodes on the substrate adapted to collect particulate matter between the electrodes, thereby establishing an electrically conductive path through collected particulate matter between the electrodes that can be detected by measuring electrical resistance between the electrodes, R | 05-12-2011 |
| 20110203348 | SOOT SENSOR SYSTEM - A soot sensor includes a soot sensor including a sensor element and heater element disposed on a first surface of the soot sensor. A soot sensing system may include a soot sensor and circuitry electrically coupled to the sensor and heater elements of the soot sensor. The circuitry is configured to determine an amount of soot accumulated on the soot sensor and to control heating of the heater element in response to the soot accumulation. | 08-25-2011 |
| 20110232362 | DETECTION OF EXHAUST FILTER EFFECTIVENESS - A method and kit for determining the effectiveness of an exhaust filter. The method may involve exposing an indicator to an exhaust stream of a engine downstream of the exhaust filter, visually comparing the indicator against test samples, and assigning a level of exhaust filter effectiveness based on the comparison. The method may also involve restricting the exhaust stream, diverting a test stream of exhaust from the exhaust stream, and exposing the indicator to the test stream. The kit may include a collector having a housing defining a flow passage configured to transmit a test stream of exhaust from a engine and a restrictor having a orifice plate configured to restrict an exhaust stream from which the test stream is diverted. | 09-29-2011 |
| 20110232363 | PROCESS FOR MONITORING THE FUNCTION OF A PARTICULATE FILTER - A process for monitoring a conversion capacity of a particulate filter arranged in an exhaust gas duct of an internal combustion engine to oxidize nitrogen monoxide to nitrogen dioxide over a catalytic coating includes determining a flow resistance of the particulate filter and setting a temperature of the exhaust gas upstream of the particulate filter. A threshold for a change in the flow resistance of the particulate filter is defined. The monitoring process determines that inadequate conversion capacity of the catalytic coating of the particulate filter is reached when a change in the flow resistance of the particulate filter does not reach the defined threshold within a given period of time. | 09-29-2011 |
| 20110232364 | METHOD OF DIAGNOSING REGENERATION FAILURE OF EXHAUST EMISSION CONTROL DEVICE - Provided is a method of diagnosing regeneration failure of an exhaust emission control device including filter regenerating means for forcibly heating a particulate filter | 09-29-2011 |
| 20110259079 | GAS SENSOR - A gas sensor is capable of detecting a concentration of PM contained in an exhaust gas emitted from a diesel engine. The gas sensor is comprised of a ceramic substrate and detection parts which are formed on the ceramic substrate with resistance parts. A resistance value of each of the resistance parts is changed on the basis of the quantity of conductive particulate matter captured by and accumulated on the detection parts. The detection parts have a different detection range. A part of the detection range of each of the detection parts is overlapped together. The concentration of PM contained in the target detection gas is detected on the basis of the change of the resistance value of the resistance parts. | 10-27-2011 |
| 20110314899 | METHOD AND DEVICE FOR OPERATING A PARTICLE SENSOR - A method for operating a particle sensor ( | 12-29-2011 |
| 20120006094 | PARTICULATE MATTER DETECTOR, AND METHOD FOR DETECTING PARTICULATE MATTER - A particulate matter detector of the present invention has an electrode portion, a signal measuring portion, and a calculation portion and further has a measurement signal memory portion for memorizing the values of the measurement signal measured by the signal measuring portion, a signal judgement portion for judging the necessity of correction by comparing a calculated amount of change with a value of a background signal noise after calculating an amount of change between values of the consecutive measurement signals of 10 or less samples memorized by the measurement signal memory portion, and a correction portion for correcting the value of the measurement signal, if the calculated amount of the change shows a decrease of at least twice the value of the background signal noise, by adding the decrease value to the value of the measurement signal where the decrease is confirmed. | 01-12-2012 |
| 20120017666 | EXHAUST GAS ANALYZING SYSTEM - In a gas analyzer | 01-26-2012 |
| 20120031168 | SENSOR CONTROLLER AND EXHAUST GAS TREATMENT SYSTEM USING THE SAME - A sensor controller is for a particulate matter detection sensor that includes a pair of opposed electrodes spaced from each other and disposed on an attachment portion. The sensor controller includes a calculation portion configured to calculate an amount of particulate matter attached to the particulate matter detection sensor based on a detection value from the particulate matter detection sensor, and a determination portion configured to determine whether water exists in the exhaust passage based on the detection value. Thus, it is possible to accurately determine whether water exists in the exhaust passage. | 02-09-2012 |
| 20120090377 | SYSTEM FOR DETERMINING NUMBER OF PARTICLES - Provided is a system for determining a number of particles, which has a simplified and compact structure as well as a reduced cost. The system comprises a diluter (PND | 04-19-2012 |
| 20120103057 | PARTICULATE MATTER DETECTION SENSOR - In a PM detection sensor, a gas introduction hole is formed in a cover unit which surrounds a PM detection element. The gas introduction hole faces a detection part having detection electrodes of a comb structure. A projected part generated when an opening part of the gas introduction hole is projected on the detection part is within an inside area of the detection part. The projected area of the opening part of the gas introduction hole is positioned within the inside area having a uniform electric field intensity between the detection electrodes. The target detection gas is directly introduced through the gas introduction hole to the area having the uniform electric field intensity generated on the detection part. PM contained in the target detection gas is captured and accumulated on the area having the uniform electric field intensity but not on the area having non-uniform electric field intensity. | 05-03-2012 |
| 20120103058 | PARTICULATE MATTER DETECTION ELEMENT - A shielding part is formed on a detection part in a particulate matter detection element. The detection part has a pair of detection electrodes formed in a comb structure. A shielding layer is made of heat insulating material and formed on the detection part in order to shield a predetermined area having non-uniform electric field intensity. An area having uniform electric field intensity on the detection part is exposed only to exhaust gas as target detection gas when a predetermined voltage is supplied between the detection electrodes in order to detect electric characteristics of the detection part. This structure prevents the area other than the area having the uniform electric field intensity on the detection part from being exposed to the exhaust gas. | 05-03-2012 |
| 20120103059 | METHOD AND DEVICE FOR DETECTING PARTICULATE MATTER CONTAINED IN A GAS TO BE MEASURED - A particulate matter detection element includes a capacitance component disposed in parallel with a detected resistance R | 05-03-2012 |
| 20120125081 | PARTICULATE FILTER DIAGNOSTICS - A system includes an internal combustion engine producing an exhaust stream, a particulate filtering device that treats the exhaust stream, a particulate sensor operatively coupled to the exhaust stream at a position downstream of the particulate filtering device, and a temperature sensor operatively coupled to the exhaust stream. The system includes a controller that interprets a particulate sensor particulate stability condition, interprets a particulate sensor input value and a particulate sensor temperature, compensates the particulate sensor input value in response to the particulate sensor temperature, and filters the compensated particulate sensor input value. The controller determines a soot accumulation value in response to the filtered compensated particulate sensor input value, interprets a diagnostic enable condition, and determines a particulate filter diagnostic value in response to the active diagnostic enable condition and the soot accumulation value. The controller provides the particulate filter diagnostic value to an output device. | 05-24-2012 |
| 20120151992 | PARTICULATE MATTER DETECTION SENSOR - In a PM detection sensor S having a PM sensor element 1 installed in an exhaust-gas pipe of an engine E/G, PM detection electrodes are placed in detection spaces in slits, respectively, formed in an insulation substrate. In the insulation substrate, one slit is embedded between an electric field generating electrode and a common electric field generating electrode. The other slit is embedded between an electric field generating electrode and the common electric field generating electrode. The same magnitude of an electric field is generated between the detection spaces when electric power is supplied to the electric field generating electrodes. An average value of sensor outputs transferred from the PM detection electrode is used as a sensor output of the PM sensor element. | 06-21-2012 |
| 20120174652 | SYSTEM AND METHOD FOR ESTIMATING A MASS OF PARTICULATE MATTER ACCUMULATED IN A PARTICULATE FILTER - A particulate estimation system is configured for estimating a mass of particulate matter accumulated in a particulate filter of an exhaust system. The system includes a memory device, an interface, and a controller. The memory device stores a plurality of modules. Each of the plurality of modules is configured to uniquely estimate an amount of the particulate matter accumulated within the particulate filter over a period of time. The interface receives a plurality of input signals. The plurality of input signals correspond to a plurality of modules that are stored in the memory device. The controller derives a hybrid model based on the input signals. The hybrid model is configured to provide an output that is an estimation of the amount of particulate matter accumulated within the particulate filter over the period of time as a function of the plurality of input signals. | 07-12-2012 |
| 20120174653 | PM EMISSION AMOUNT ESTIMATION DEVICE FOR DIESEL ENGINE - Providing a PM emission amount estimation device for the diesel engine wherein the accuracy of the correction in correcting the basic level of the PM emission amount by use of the PM emission amount estimation map can be enhanced; and, the PM emission amount particularly during the transient state of the engine operation condition can be accurately computed so as to estimate, with high precision, the PM emission amount and the PM emission accumulated-amount (integrated amount) during the whole engine operation conditions including the transient state as well as the steady state. A PM emission amount estimation device for estimating the amount of the PM for estimating the amount of the PM that is emitted from a diesel engine and collected by a DPF provided in the exhaust gas passage of the engine, the device including, but not limited to: a PM emission amount estimation base-map | 07-12-2012 |
| 20120186330 | DETECTION APPARATUS - A detection apparatus includes a particulate matter (PM) detection unit, a temperature detection unit, and a correction unit. The PM detection unit includes an insulator, a pair of electrodes, and a detector. The insulator is disposed in an exhaust path of an internal combustion engine through which an exhaust gas flows. The pair of electrodes are arranged in contact with at least a part of the insulator. The detector detects a PM detection value which is a value correlated to an amount of PM in the exhaust gas. The temperature detection unit detects at least one of an exhaust temperature of the exhaust gas passing through the PM detection unit and an insulator temperature of the insulator. The correction unit corrects the PM detection value detected by the PM detection unit based on at least one of the exhaust temperature and the insulator temperature. | 07-26-2012 |
| 20120247181 | PARTICULATE MATTER DETECTING APPARATUS FOR INTERNAL COMBUSTION ENGINE - An object of the present invention is to provide a particulate matter detecting apparatus for an internal combustion engine that can maintain an appropriate balance between reduction in time required for one detecting sequence and limiting of power consumption of a heater for sensor reset. | 10-04-2012 |
| 20120285219 | PARTICULATE DETECTION SYSTEM - A particulate detection system ( | 11-15-2012 |
| 20120304738 | Apparatus for Monitoring Particles - A new apparatus for monitoring fine particle concentration in an exhaust system of a combustion engine has a part that extends into the exhaust system, and a housing that includes structure that attaches and seals the apparatus to the exhaust system through a single opening in a wall of the exhaust system. A gas inlet in the housing provides a measurement flow into a particle measurement sensor inside the housing. At least a fraction of the particles entering the particle measurement sensor are charged, and at least a fraction of the current carried by the charged particles are detected. A gas outlet in the housing carries the measurement flow away from the particle measurement sensor. The structure that attaches the apparatus to the exhaust system has one electrical connector that provides power to the sensor, and another electrical connector that transmits the electrical signal created by the sensor. | 12-06-2012 |
| 20120324981 | Soot Sensor System - A soot sensor includes a soot sensor including a first element on a first surface of the soot sensor. A soot sensing system may include a soot sensor and circuitry electrically coupled to the first element of the soot sensor. The circuitry is configured to determine an amount of soot accumulated on the first element and to control heating of the first element in response to the soot accumulation. | 12-27-2012 |
| 20130019653 | SENSOR CONTROL DEVICE - A sensor control device is adapted for an engine including an exhaust passage along which an exhaust purification catalyst and a particulate matter detection sensor are disposed. The exhaust purification catalyst | 01-24-2013 |
| 20130081444 | SOOT EMISSION ESTIMATION METHOD AND ARRANGEMENT - A soot emission estimation method and arrangement for a diesel engine estimates the amount of soot generated in a combustion chamber of the diesel engine. The method includes providing values for speed and load; providing a base soot value from an engine speed-load resolved reference soot map; defining and providing emission influencing input parameters; calculating a deviation between at least one emission influencing input parameter and a speed-load resolved reference value for the at least one emission influencing input parameter; multiplying the calculated deviation with an individual value from an individual speed-load resolved weight map for the at least one emission influencing input parameter, thereby creating an emission influencing input parameter related correction for the at least one emission influencing input parameter; adding and summarizing the at least one emission influencing input parameter related correction to the base soot value and thereby obtaining an estimated soot mass flow value. | 04-04-2013 |
| 20160011093 | PARTICLE DETECTION SYSTEM | 01-14-2016 |
| 20160018309 | EXHAUST GAS ANALYSIS SYSTEM AND EXHAUST GAS ANALYSIS PROGRAM - The present invention is one that, even while cooling exhaust gas without dilution, makes it possible to accurately measure particle concentration, and provided with: a particle concentration measurement device; a sampling cooling pipe that cools the exhaust gas collected from an exhaust gas transfer pipe to a measurable temperature of the particle concentration measurement device without dilution, and introduces the cooled exhaust gas into the particle concentration measurement device; a temperature sensor that detects temperature of the exhaust gas flowing into an exhaust gas inlet; and a calculation device that, from the detected temperature by the temperature sensor and the temperature of the exhaust gas introduced into the particle concentration measurement device, corrects measured particle concentration by the particle concentration measurement device in real time to calculate the particle concentration of the exhaust gas flowing through the exhaust gas transfer pipe. | 01-21-2016 |
| 20160033385 | ENGINE OUTPUT SOOT DIAGNOSTIC CONTROL SYSTEM BASED ON TRANSIENT DRIVE CYCLE DETECTION - An internal combustion engine control system including an internal combustion engine including at least one cylinder configured to perform combustion of an air/fuel mixture therein during a drive cycle. An electronic engine control module is configured to selectively execute at least one soot-based diagnostic operation that diagnoses the internal combustion engine based on exhausted soot. An electronic diagnostic evaluation module is in electrical communication with the engine control module and is configured to disable the at least one soot-based diagnostic operation based on at least one transient drive event of the internal combustion engine during the drive cycle. | 02-04-2016 |
| 20160047731 | PARTICULATE MATTER MEASUREMENT DEVICE - A particulate matter measuring device includes: a diesel particulate filter (DPF) in which upstream side and downstream side openings of multiple cells partitioned by porous partition walls are alternately plugged; a pair of first electrodes received in a pair of first electrode cells arranged diagonally with a central cell therebetween; a pair of second electrodes received in a pair of second electrode cells arranged diagonally with the central cell therebetween; a first connecting member for connecting the first electrodes to each other; a second connecting member for connecting the second electrodes to each other; and a unit that calculates an amount of particulate matter trapped in the DPF on the basis of capacitance between the electrodes. The four cells which are adjacent to each other around the partition walls of the central cell and sandwiched between the first electrode cells and the second electrode cells are used as measurement cells. | 02-18-2016 |
| 20160047732 | DEVICE FOR MEASURING PARTICULATE SUBSTANCE - A particulate matter (PM) measuring device including a diesel particulate filter (DPF) that has a plurality of cells plugged alternatingly at upstream and downstream sides. The cells are compartmentalized by porous partition walls. At least one of the cells is a measurement cell. The device also includes a pair of electrodes inserted from the non-plugged side in a pair of cells that oppose each other sandwiching the measurement cell. The device also includes a PM accumulation amount calculating unit that calculates an amount of accumulated PM, which is collected in the DPF, on the basis of the capacitance between the electrodes. The electrodes include conductive wire cores that are covered with insulating layers. | 02-18-2016 |
| 20160103054 | PARTICULATE MEASUREMENT SYSTEM - A particulate measurement system includes an ion generation section for generating ions by means of corona discharge; an electrification chamber for electrifying particulates contained in a gas under measurement; a measurement signal generation circuit for generating a measurement signal which correlates with the amount of the particulates; and a particulate amount determination section for determining the amount of the particulates. The particulate measurement system further includes a particle diameter estimation section for estimating the particle diameter of the particulates contained in the gas under measurement. The particulate amount determination section performs correction by multiplying the measurement signal or the amount of the particulates determined from the measurement signal by a coefficient relating to the ratio between the estimated particle diameter and a reference particle diameter. | 04-14-2016 |
| 20160153885 | PARTICULATE MATTER SENSOR | 06-02-2016 |
| 20160169784 | PARTICULATE MATTER FILTER DIAGNOSTIC TECHNIQUES BASED ON EXHAUST GAS ANALYSIS | 06-16-2016 |
| 20170234786 | METHODS AND SYSTEMS FOR PREDICTION OF SENSOR RESPONSE TIME | 08-17-2017 |
| 20180023448 | METHOD AND SYSTEM FOR EXHAUST PARTICULATE MATTER SENSING | 01-25-2018 |
