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Class 73/118.2 - Intake air flow


Subclass of Class 73 - Measuring and testing
Definition: Subject matter wherein the auxiliary unit is the air intake
No. of patents: 752
Last issue date: 09/02/2008


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NumberTitleIssue Date
5693879Sensor carrier for a device for measuring the mass of a flowing medium of an internal combustion engine
A device for measuring the mass of a flowing medium having a temperature-dependent sensor element, which is inserted flush in a recess of a sensor carrier and is retained therein by means of an adhesive. The sensor carrier is made by bending a thin metal ...
12/02/1997
5684407Electronic circuit packaged with a position sensor
A voltage follower is incorporated within a molded electrical connector interface of a position sensor in a way that does not detract from the dimensions or the performance of the finished sensor. The incorporation of the voltage follower into the housing...
11/04/1997
5681989Intake air amount measuring apparatus for internal combustion engines
The invention provides an apparatus for measuring intake air for an internal combustion engine by means of a detecting unit including a heat generating resistor, and a flow amount arithmetic unit for calculating an air flow amount on the basis of the outp...
10/28/1997
5681988Apparatus for indicating the degree of dirtiness of a filter
An apparatus for indicating the extent to which an air filter in an internal combustion engine is fouled. For this purpose the apparatus includes a pressure sensor, a sensor to detect the rotational speed of the engine, and an additional sensor which dete...
10/28/1997
5681990Capacitive throttle position sensor
A capacitive throttle position sensor includes an electrode board having at least three electrodes, a driver for selectively driving the electrodes, and a rotary member including a dielectric that provides capacitive path to an output electrode. Preferabl...
10/28/1997
5679891Failure diagnostic apparatus for swirl control apparatus
A region in which Tp
10/21/1997
5679892Temperature-sensitive flow amount detection apparatus for internal combustion engine
A pull-down resistor is connected to a power source line between power source connectors and a detector circuit in an apparatus in which a power source is connected via the power source connectors to the detector circuit, which includes a temperature-sens...
10/21/1997
5677482Determining throttle position sensor output
A signal indicating closed throttle position is corrected, through increases and decreases, as a function of an engine's volumetric efficiency, engine speed, application of a vehicle's brake, and the selection of a transmission gear....
10/14/1997
5672818Throttle valve adjusting unit
A throttle control valve in which potentiometer paths of a potentiometer are mounted on the lid and an electrical motor coupling is also provided, so that when the lid is attached to the throttle valve stub, the potentiometer and the control motor can be ...
09/30/1997
5672822Thermal flow meter with less turbulence in fluid flow
A central member of a sensor unit is inserted through a sensor unit mounting hole of a cylindrical body having a main passage and the sensor unit is assembled on the cylindrical body. The sensor unit comprises the central member which is provided at the c...
09/30/1997
5670714Air-pollution reduction method and system for the interior of an automobile
The present invention provides a method of reducing the level of air pollution in the interior of a vehicle, the vehicle having a detection system for detecting one or more conditions and an air intake system leading to the interior of the vehicle, the ai...
09/23/1997
5668313Method for correcting the output signal of an air mass meter
In a method for correcting an output signal of an air mass meter, an air mass aspirated by an internal combustion engine is detected, so that first a characteristic of the air mass meter representing a relationship between an output voltage of the air mas...
09/16/1997
5659134Method for detecting abnormalities in a crank angle sensor and apparatus for detecting abnormalities in a crank angle sensor
To improve the reliability and detecting capability of an apparatus for detecting abnormalities in a crank angle sensor, the apparatus comprises detection keeping devices which assumes that there is an air weight flow higher than a predetermined value for...
08/19/1997
5656765Air/fuel ratio control diagnostic
An automotive internal combustion engine air/fuel ratio control system is diagnosed by monitoring the oxygen content of catalytically treated engine exhaust gas for sustained deviations into regions of saturation in which the catalytic treatment device is...
08/12/1997
5656938Temperature compensation in mass flow sensors employing the hot-wire anemometer principle
For determining the air mass flow in the intake pipe of an internal combustion engine by means of an electrical bridge, normally the current flowing through the current measurement resistor when balancing the bridge is evaluated as an indirect measure of ...
08/12/1997
5654506Heat type air flow meter
A heat type air flow meter with improved resistance to radio wave interference by restraining a high frequency noise from a resistor and the supporting materials thereof provided in air passage. At least one high frequency band cut-off filter having a cap...
08/05/1997
5654501Engine controller with air meter compensation
An electronic engine controller (EEC) for an internal combustion engine develops an estimate of air charge by receiving a signal from an air meter positioned in an intake manifold of the engine. The signal is indicative of mass flow rate of air past the m...
08/05/1997
5644079Device for measuring the mass of a flowing medium
A device for measuring the mass or flow rate of a flowing medium of the air aspirated by an internal combustion engine including an electronic control circuit, which evaluates the electrical signals of a temperature-dependent sensor element and which is a...
07/01/1997
5641891Method for setting and checking the flow in valves
Method for setting and/or checking the flow or through-flow in valves, particularly injection valves for internal combustion engines. The injection valve is placed in a measuring device and subject to the action of a fluid. The fluid is passed through the...
06/24/1997
5635635Method and apparatus for detecting the intake air quantity of an engine
The present invention is able to detect the intake air quantity which has been discriminated into flow direction by detecting the engine intake air quantity at two locations separated in the direction of flow of the intake air, comparing the detection val...
06/03/1997
5635634Method for calculating the air charge for an internal combustion engine with variable valve timing
The invention relates to a method for dynamically correctly computing the air charge of a cylinder for an internal combustion engine having a variable charge-cycle control such as with an adjustable inlet and/or outlet camshaft especially in the transient...
06/03/1997
5631416Device for measuring the mass of a flowing medium
A device for measuring the mass or flow rate of a flowing medium. The device has a temperature resistor for measuring the flow medium mounted externally on the housing of the device, so that by means of the temperature-resistor a spatial distance from the...
05/20/1997
5631412Apparatus and method for estimating atmospheric pressure in an internal combustion engine
Engine intake air flow rate is detected as a mass flow rate, using a thermal type air flow meter, and engine intake air flow rate is also detected as a volumetric flow rate based on throttle valve opening and rotational speed. The mass flow rate is conver...
05/20/1997
5631415Air flow rate measuring device
An air flow rate measuring device for measuring intake air flow rate in an automotive engine, improved to reduce any error attributable to variation in the configurations of air cleaner and/or duct forming air passage upstream of the flow rate measuring d...
05/20/1997
5616843Method and circuit configuration for protecting a heated temperature-dependent sensor resistor against overheating
A temperature detector resistor and a sensor resistor are disposed in an intake manifold of an internal combustion engine. The two resistors each belong to a respective bridge branch of a measuring bridge having a bridge diagonal which is led to a first d...
04/01/1997
5614667Method and apparatus for controlling throttle valve contamination learning
The invention relates to technology for avoiding the influence of intake air volumetric flow rate changing due to contamination of a throttle valve opening. When the opening of the throttle valve of an internal combustion engine is large, the atmospheric ...
03/25/1997
5604306Apparatus and method for detecting a plugged air filter on an engine
An apparatus and method for detecting a plugged condition of an air filter uses a computer based model of the air restriction....
02/18/1997
5597951Intake air amount-estimating apparatus for internal combustion engines
An intake air amount-estimating apparatus for an internal combustion engine estimates an amount Gc of intake air actually drawn into a combustion chamber, based on a model formulated on an intake passage in which a portion of the intake passage extending ...
01/28/1997
5581026Flow meter
A flow meter for measuring a flow rate of fluid includes a body providing a main passage through which the fluid flows. A plurality of support elements connect an inner wall surface of the body and a central element so as to support the central element su...
12/03/1996
5571964Flow meter
A flow meter for measuring a flow rate of fluid includes a body providing a main passage through which the fluid flows. A plurality of support elements connect an inner wall surface of the body and a central element so as to support the central element su...
11/05/1996
5571960Throttle valve opening degree sensor
The present invention provides a throttle valve opening degree sensor for detecting the opening degree of a throttle valve used for an internal combustion engine wherein a rotor shaft capable of interlocking with a throttle valve has a cylindrical coverin...
11/05/1996
5569846Modular apparatus for iteratively evaluating combustion flow process
A modular apparatus for evaluating flow processes. The apparatus has (i) a closure for a chamber, the closure defining at least one aperture and at least one seating basin facing away from the chamber; and (ii) at least two stacking elements cooperatively...
10/29/1996
5569847Air-fuel ratio estimator for internal combustion engine
An air-fuel ratio estimator for estimating air-fuel ratio of an air and fuel mixture supplied to an internal combustion engine from an output of an air-fuel ratio sensor. In the estimator, detection response lag time of said air-fuel ratio sensor is appro...
10/29/1996
5567874Rotary position detecting device
A rotary position detector comprises an integrally molded rotor made of a synthetic resin to which a contact is fixed, a housing and a cover member on which a resistance circuit surface is formed. A contact surface and the resistance circuit surface to wh...
10/22/1996
5562076Reciprocating piston engine
A reciprocating piston engine, in particular a single-cylinder Diesel engine (2), has an air filter (1) in the suction pipe (3). To service the same, a pressure gauge (13) is arranged downstream of the filter cartridge (7), in the direction of flow. A che...
10/08/1996
5563340Mass air flow sensor housing
A mass air flow sensor housing for reducing backflow includes a U-shaped air flow path having an elliptical inlet and an outlet. A mass air flow sensor is positioned in the U-shaped air flow path. A converging ellipse inlet to the U-shaped air flow path r...
10/08/1996
5559287Device for reducing drift in measuring instruments
An electrical measuring instrument, in particular an air flow rate meter in an internal combustion engine, which is exposed to a flowing medium, has a mount, a substrate retained in the mount, terminals, and a temperature-dependent measuring resistor disp...
09/24/1996
5555870Method and apparatus for sensing air flow into a cylinder of internal combustion engine and method and apparatus for controlling fuel of the internal combustion engine arranged to use the method and apparatus
A method and an apparatus for sensing an air flow into a cylinder of an internal combustion engine are arranged to determine a number of revolutions of the engine, determine a pressure of an intake pipe of the engine, and calculate an air flow Qc into a c...
09/17/1996
5546795Method and apparatus for diagnosis of trouble in supercharging pressure sensor
In a method and apparatus for diagnosing a trouble in supercharging pressure defecting means in an internal combustion engine which is provided with a throttle valve at the downstream side of a compressor of a supercharger and a means for detecting a supe...
08/20/1996
5546794Device for measuring the mass of a flowing medium
A devices for measuring the mass of a flowing medium, having a temperature-sensitive measuring element, in which accurate medium flow measurement can be made in the presence of a pulsating flow which is characterized by flow fluctuations. In order to prov...
08/20/1996
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