Patent application number | Description | Published |
20080295575 | GAS FLOWMETER AND ENGINE CONTROL SYSTEM - In a gas flowmeter in which a rod and a sensor element are formed as a single body, for preventing heat of the sensor element from flowing into a sensor probe through a substrate (rod) so as to suppress considerable power consumption, and for obtaining a necessary response speed with respect to a flow rate of gas to be measured or a change in temperature, the gas column (rod) is made of an insulating material on a center axis of the sensing probe and is formed with a conductor pattern on its surface, and the sensing probe connects the sensor element disposed in a pipe through which the gas to be measured flows and a harness terminal through the conductor on the surface of the rod, so as to measure a gas flow rate by using the sensing prove. | 12-04-2008 |
20080295590 | THERMAL TYPE FLOW METER AND ENGINE CONTROL SYSTEM USING THE SAME - A thermal type flow meter has a first heating resistor, a second heating resistor for blocking heat transfer from the first heating resistor to a console, a temperature measuring resistor interposed between the two heating resistors, and a controller for calculating a flow rate unrelated to temperatures of fluid from temperatures of the resistors and currents supplied to the heating resistors. | 12-04-2008 |
20090090177 | Thermal Flow Meter, Thermal Flow Meter Control Method, and Sensor Element of Thermal Flow Meter - A thermal flow meter corrects flow rate detection errors produced by vaporization of liquid phase components included in a gas to be measured. The thermal flow meter includes a correction circuit | 04-09-2009 |
20090143959 | ENGINE CONTROL SYSTEM AND CONTROL METHOD THEREOF - An engine that re-circulates its exhaust gas suffers decreased accuracy in estimating an EGR rate real-time especially while the operating state of the engine is in a transitional state, which often results in torque fluctuations and deteriorated exhaust gas. | 06-04-2009 |
20090151445 | FLUID FLOW RATE MEASUREMENT APPARATUS - Disclosed herein is a fluid flow rate measurement apparatus which prevents accumulation of pollutional substances in a sub-passage to enable high-accuracy fluid flow rate measurement. | 06-18-2009 |
20090241654 | Thermal Gas Flowmeter - A high-accuracy EGR sensor is provided. A recirculation system is provided which controls the flow rate of EGR by use of the sensor. A thermal gas flowmeter includes a heating resistor disposed in a flow of gas to be measured for detecting the flow rate of the gas, and an external circuit electrically connected to the heating resistor for outputting a signal according to the flow rate of the gas to be measured using the heating resistor. The heating resistor is controlled to be heated at a temperature equal to or higher than a vapor film forming temperature for forming a vapor film. | 10-01-2009 |
20090272187 | THERMAL TYPE FLOW METER - There is provided a thermal type flow meter capable of accurately detecting a flow rate even when a fluid temperature varies rapidly or when the fluid temperature is high. A probe includes: a first main heating resistor; a second main heating resistor set at a temperature different from that of the first main heating resistor; and a sub-heating resistor for heating lead wires of the two main heating resistors. A CPU of a sensor control circuit finds a fluid temperature by using the two main heating resistors, and finds a fluid flow rate by using at least one of the two main heating resistors. | 11-05-2009 |
20110166768 | Control Device for Engine - A control device for an engine, capable of accurately estimating the quantity of exhaust heat from the engine and performing engine control which improves the exhaust quality and fuel consumption of the engine in various operating conditions thereof, by using the accurate extimated value of the quantity of exhaust heat. A control device for an engine is provided with an exhaust flow rate sensor for directly sensing the flow rate of exhaust gas discharged from the engine, an exhaust temperature estimating device for sensing or estimating the temperature of the exhaust gas discharged from the engine, and an exhaust heat quantity estimating device for estimating, based on an output of the exhaust flow rate sensor and an output of the exhaust temperature estimating device, the quantity of heat of the exhaust gas discharged from the engine. | 07-07-2011 |
20130192388 | Flow Sensor and Manufacturing Method of the Same and Flow Sensor Module and Manufacturing Method of the Same - Technique of suppressing performance variations for each flow sensor is provided. In a flow sensor FS | 08-01-2013 |
20140109691 | Flow Sensor and Manufacturing Method of the Same and Flow Sensor Module and Manufacturing Method of the Same - Technique of suppressing performance variations for each flow sensor is provided. In a flow sensor FS | 04-24-2014 |
20140190273 | Flow Sensor and Manufacturing Method of the Same and Flow Sensor Module and Manufacturing Method of the Same - Technique of suppressing performance variations for each flow sensor is provided. In a flow sensor FS | 07-10-2014 |
20140352424 | AIRFLOW MEASURING APPARATUS - Airflow measuring apparatus compring: sub-passage that takes in part of flow of fluid flowing through an intake pipe; sensor element that is disposed in the sub-passage to measure the flow of fluid; a circuit part that converts the flow of fluid detected by the sensor element into an electric signal; connector part connected to the circuit part to output a signal externally; and casing that supports the sensor element and the circuit part, the sensor element being disposed in the intake pipe. The sensor element includes a cavity disposed at a semiconductor substrate, a diaphragm including a thin film part that covers the cavity. The sensor element on a lead frame have surfaces that are mold-packaged with resin so that a diaphragm of the sensor element and part of the lead frame are exposed. One hole is disposed at the lead frame for communication between the cavity and exterior. | 12-04-2014 |
20150107353 | Flow Sensor and Method for Manufacturing the Same - A technique capable of suppressing performance variation of every flow sensor and achieving performance improvement is provided. For example, in an arbitrary cross-sectional surface in parallel to a moving direction of a gas flowing on an exposed flow detecting unit FDU which is formed in a semiconductor chip CHP | 04-23-2015 |
20150122010 | Thermal Flow Meter - To obtain a thermal flow meter capable of alleviating stress in an axial direction that acts on a lead according to a temperature difference between a proximal end side and a leading end portion side of a measuring portion. An air flow sensing portion | 05-07-2015 |
20150122011 | Thermal Flow Meter - Provided is a thermal flow meter through which a measurement with high accuracy and has a discharge function. In a thermal flow meter | 05-07-2015 |
20150122012 | Thermal Flow Meter - The present invention has been made to improve measurement accuracy of a thermal flow meter. In the thermal flowmeter according to the invention, a circuit package ( | 05-07-2015 |
20150122050 | FLOW SENSOR - Technology capable of suppressing performance variation for each flow sensor and enhancing the performance is provided. According to a flow sensor of an embodiment, a local cavity CAV is provided on an upper surface SUR (MR) of a resin MR to generate an eddying current in a counterclockwise direction, so that an advancing direction of gas (air) that collided to an exposed side surface of a semiconductor chip CHP | 05-07-2015 |
20150135823 | Thermal Flow Meter - To obtain a thermal flow meter capable of providing thermal insulation without degrading responsiveness of a temperature detection element. A thermal flow meter | 05-21-2015 |
20150135824 | Thermal Flow Meter - The present invention aims to provide a thermal flow meter capable of avoiding pollutants guided to an outer circumference side of the bypass passage by virtue of a centrifugal force or particle or liquid pollutants that are not centrifugally separated from reaching a heat transfer surface of an air flow sensing portion and obtaining high measurement accuracy. In the thermal flow meter of the present invention, the bypass passage has an upstream side curved path | 05-21-2015 |
20150160054 | THERMAL FLOW METER - The present invention provides a thermal flow meter | 06-11-2015 |
20150160058 | Thermal Flow Meter - A thermal flow meter which has a high reliability and has a gas temperature detecting portion is obtained. A thermal flow meter according to the present invention has a bypass passage for taking in and flowing measurement target gas flowing in a main passage, a circuit package having an air flow measurement circuit for measuring an air flow by carrying out heat transfer in relation to the measurement target gas flowing in the bypass passage, and a temperature detecting portion which senses a temperature of the measurement target gas, and a case which is provided with an external terminal outputting an electric signal indicating the air flow and an electric signal indicating the temperature of the measurement target gas and supports the circuit package, the circuit package is structured such that the air flow measurement circuit and the temperature detecting portion are contained by resin, the temperature detecting portion has a protrusion which protrudes out of a circuit package main body, the protrusion is formed into a shape which is thicker in its root than in its leading end portion and its neck portion is narrower little by little toward the leading end. | 06-11-2015 |
20150177038 | Thermal Flow Meter - Provided is a thermal flow meter to improve the measurement accuracy of a temperature detector provided in a thermal flow meter. The thermal flow meter includes a bypass passage through which a measurement target gas | 06-25-2015 |
20150177039 | Thermal Flow Meter - The invention provides a thermal flow meter which can precisely sense the measurement target gas even in the case that the resin housing and the cover are welded by the laser. The invention is a thermal flow meter ( | 06-25-2015 |
20150177043 | Thermal Flow Meter - In order to provide a thermal-type flowmeter highly accurate, with high reliability, and simple in construction, while being available at a lower price, a thermal-type flowmeter as proposed includes a sub-path that takes in a fluid under measurement; a sensor element that measures a flow-rate of the fluid under measurement in the sub-path; a temperature detection element that detects a temperature of the fluid under measurement; a drive circuit that controls a heating temperature of the sensor element; and a protection circuit that protects the drive circuit from noise, a cavity being formed on a substrate of the sensor element, an exothermic resistor being provided on a thin-film part on the cavity through the intermediary of an electrically insulating film, and a flow rate being detected on the basis of temperature distribution in the thin-film part. | 06-25-2015 |
20150185058 | Thermal Flow Meter - The present invention is to improve measurement accuracy of a thermal flow meter. In a thermal flow meter of the invention, a circuit package | 07-02-2015 |
20150185060 | Thermal Flow Meter - The present invention provides a thermal flow meter which can suppress a degradation of measurement accuracy caused by deformation of a diaphragm and a stained rear surface thereof even in a case where a gap is provided in order to form the diaphragm in an air flow sensing element. The present invention relates to a thermal flow meter | 07-02-2015 |
20150187708 | Thermal Flow Meter - Provided is a thermal flow meter that can be prevented from being eroded due to adhesion of water or like to a cut end portion of the lead exposed from the mold resin of the circuit package. A thermal flow meter | 07-02-2015 |
20150192441 | Thermal Flow Meter - In order to provide a thermal flow meter ( | 07-09-2015 |