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Class 123/696 - Proportional or integral circuit


Subclass of Class 123 - Internal-combustion engines
Definition: Subject matter wherein (1) the output signal of the transducer
No. of patents: 187
Last issue date: 10/28/2008


1          
NumberTitleIssue Date
7441554Engine controller
The invention provides an engine controller, which can determine a deterioration mode (gain deterioration or response deterioration) of an air/fuel (A/F) ratio sensor, can detect a degree of the deterioration with high accuracy, and can optimize A/F ratio feedback c...
10/28/2008
7431025Device for the operation of an internal combustion engine
Disclosed is an internal combustion engine comprising at least one cylinder and an exhaust manifold in which a catalytic converter, a first exhaust gas probe, and a second exhaust gas probe are disposed. The first exhaust probe is located upstream from the catalytic...
10/07/2008
7395125Method and controller for the adaptive control of at least one component of a technical plant
The invention relates to a method in which at least one component of a technical plant is controlled by means of a PI controller. The actual value of the regulating parameter is continuously determined during operation of the plant and the amplification factor of th...
07/01/2008
7334569Control apparatus for internal combustion engine
An air-fuel ratio feedback system is configured to calculate the deviation between a target air-fuel ratio and an air-fuel ratio sensor value, multiplying a proportional gain by the calculated deviation to obtain a feedback correction value, and add the calculated f...
02/26/2008
7325532Method for the torque-oriented control of an internal combustion engine
A method for the torque-oriented control of an internal combustion engine, in which a sum torque (MSUM) is calculated from a set torque value (MSW) and a friction torque (MF). A set injection quantity (mSL) for driving the internal combustion engine is calculated fr...
02/05/2008
7322346Method and device for engine control in a motor vehicle
A method is specified for controlling a combustion engine in a motor vehicle, namely for optimally adjusting an air/fuel ratio which is distinguished in that the air/fuel ratio is the result of a regulation process. Individual aspects of the invention further addres...
01/29/2008
7284545Device for controlling an internal combustion engine
The invention relates to a device for controlling an internal combustion engine, comprising a first regulator, whose regulating difference is the difference of an actual value and an estimated value of individual cylinder deviation of the air/fuel ratio from a prese...
10/23/2007
7270119Air/fuel ratio control device for internal combustion engine
An air-fuel ratio control apparatus for an internal combustion engine, implementing integral correction of the air-fuel ratio by an integral term edfii obtained by multiplying an integrated difference between a target air fuel ratio and the actual air-fuel ratio by ...
09/18/2007
7240671Device for correcting fuel injection amount of internal combustion engine, and control apparatus for internal combustion engine employing the device
To prevent RPM decrease, misfire, and engine stall by refraining from correcting, the amount of fuel to shift an air-fuel ratio toward a lean side to the extent of exceeding a combustion limit when the internal combustion engine operates at a low load, a control app...
07/10/2007
7225800Engine controller
The invention provides an engine controller, which can determine a deterioration mode (gain deterioration or response deterioration) of an air/fuel (A/F) ratio sensor, can detect a degree of the deterioration with high accuracy, and can optimize A/F ratio feedback c...
06/05/2007
7167791Oxygen depletion sensing for a remote starting vehicle
Automotive vehicles are increasingly being equipped with remote starting devices. If the vehicle is within a space which is very well sealed, it is possible that the concentration of the exhaust gases may exceed desirable levels. A method and system are disclosed in...
01/23/2007
7136451Method of and system for stabilizing high voltage power supply voltages in multi-energy computed tomography
A method of and a system for stabilizing High Voltage Power Supply (HVPS) DC and AC voltages in multi-energy X-ray computed tomography scanners are provided. The method comprises generating filter ratios, computing DC and AC voltages, and feeding back the computed D...
11/14/2006
7082935Apparatus and methods for closed loop fuel control
A method of controlling fuel input to an engine of a vehicle. A feedback signal is received from a sensor that senses engine exhaust. A dither signal having the same frequency as the feedback signal is applied to a fuel control signal controlling fuel to the engine....
08/01/2006
6964159System and method for adjusting air/fuel ratio
The invention relates to a new method and system for optimizing the efficiency of an automotive catalytic converter. The claimed invention comprises adjusting an air/fuel ratio in the cylinders of an internal combustion engine to maintain a desired level of oxidants...
11/15/2005
6915777Control system for general-purpose engine
A control system for general-purpose spark-ignition internal combustion engine to be used for a portable generator, etc., having one or two cylinders and an actuator connected to the throttle valve to open or close the throttle value. In the system, an adaptive cont...
07/12/2005
6854262Air-fuel ratio control apparatus of internal combustion engine and method thereof
The present invention has an object to provide an air-fuel ratio control apparatus of an internal combustion engine and a method thereof, for estimating with high accuracy an oxygen adsorption amount in an exhaust purification catalyst, and controlling the oxygen ad...
02/15/2005
6769243System and method for determining target oxygen storage in an automotive catalyst
The invention relates to a new method and system for optimizing the efficiency of an automotive catalytic converter. The invention comprises adjusting an air/fuel ratio in the cylinders of an internal combustion engine to maintain the amount of oxidants stored in th...
08/03/2004
6769422Apparatus and method for controlling air-fuel ratio of engine
When an output signal from an oxygen sensor is within a predetermined range including a value equivalent to a stoichiometric air-fuel ratio, the output signal is converted into air-fuel ratio data, to compute an air-fuel ratio control signal based on a deviation bet...
08/03/2004
6751947System and method for estimating oxidant storage of a catalyst
The invention relates to a new method and system for optimizing the efficiency of an automotive catalytic converter by adjusting the engine air/fuel ratio based on estimates of the actual amount of oxidants stored in the catalyst. To do so, the invented system estim...
06/22/2004
6520168Air-fuel ratio controller for engine
An air-fuel ratio correction coefficient calculating component is provided to an air-fuel ratio controller for an engine having the wide range air-fuel ratio sensor. In order to compensate for a time lag in detection of an air-fuel ratio detected by the w...
02/18/2003
6513510Method for controlling fuel supply of a vehicle on acceleration and a system thereof
In order to reduce noxious exhaust gasses and to improve output power of an engine when it is accelerated, by determining whether an I-gain is out of a predetermined range if a vehicle driving condition is changed to acceleration, the I-gain and a P-gain ...
02/04/2003
6483311Method and device for evaluating ionic current signals for assessing combustion processes
A method and an arrangement for detecting combustion misfires in internal combustion engines are presented where a measured ionic current signal is subjected to a floating short-time integration and a feature is formed which corresponds to the maximum val...
11/19/2002
6467471Air-fuel ratio controller for an internal-combustion engine
Even when a reaction delay time of an A/F ratio detection device changes, an A/F ratio controller prevents an A/F ratio feedback control from being disturbed. The controller is programmed to calculate an A/F ratio feedback coefficient by proportional term...
10/22/2002
6453661System and method for determining target oxygen storage in an automotive catalyst
The invention relates to a new method and system for optimizing the efficiency of an automotive catalytic converter. The invention comprises adjusting an air/fuel ratio in the cylinders of an internal combustion engine to maintain the amount of oxidants s...
09/24/2002
6453662System and method for estimating oxidant storage of a catalyst
The invention relates to a new method and system for optimizing the efficiency of an automotive catalytic converter by adjusting the engine air/fuel ratio based on estimates of the actual amount of oxidants stored in the catalyst. To do so, the invented s...
09/24/2002
6453229Air-fuel ratio control device for internal combustion engine and method thereof
In an air-fuel ratio feedback control of an internal combustion engine aimed to approximate an air-fuel ratio to a target air-fuel ratio set according to operating conditions of the engine, the feedback control is carried out using the feedback control am...
09/17/2002
6371097UEGO control circuit board portion with ASIC
A method and apparatus for controlling universal exhaust gas oxygen (UEGO) sensors comprises an application specific integrated circuit (ASIC) that includes a sensor control utilizing proportional-integral-derivative control loop, sensor drivers for gener...
04/16/2002
6371096Diagnosis system for wide-range air-fuel ratio sensor
A diagnosis system for a wide-range A/F sensor receives an air-fuel ratio (A/F) of air-fuel mixture supplied to an engine for the A/F sensor. An control unit of the diagnosis system corrects an A/F controlled object of a feedback control on the basis of a...
04/16/2002
6357431Wave form fuel/air sensor target voltage
A method of determining a goal voltage for a fuel/air sensor of an engine electronic fuel injection system includes the steps of determining a goal fuel/air sensor voltage, superimposing a wave form forcing function to the fuel/air sensor voltage for prov...
03/19/2002
6325056Operating method for an internal combustion engine with lambda-value control
The invention relates to a method for the cylinder-selective control of an air/fuel mixture to be burnt in a multi-cylinder internal combustion engine, in which the lambda values for different cylinders or groups of cylinders are separately sensed and con...
12/04/2001
6289877Method and system for controlling an air-to-fuel ratio in a non-stoichiometric power governed gaseous-fueled stationary internal combustion engine
A gaseous-fueled reciprocating internal combustion engine includes a carburetor having a throttle valve that is controlled by a speed governor. A proportional fuel control valve is disposed intermediate a fuel supply and the carburetor, and is controlled ...
09/18/2001
6286494Air-fuel ratio controller for engine
An air-fuel ratio correction coefficient calculating component is provided to an air-fuel ratio controller for an engine having the wide range air-fuel ratio sensor. The air-fuel ratio correction coefficient calculating component can accommodate a time la...
09/11/2001
6233922Engine fuel control with mixed time and event based A/F ratio error estimator and controller
An improved closed-loop feedback fuel control with a model-based A/F ratio estimator, wherein the estimator, controller and portions of the model are updated on a fixed time interval basis, thereby minimizing the impact of the control on event-based throu...
05/22/2001
6223735Control method for an oxygen linear sensor
Control method for an oxygen linear sensor, in which the sensor is located along an exhaust duct of an internal combustion engine to receive into a separate chamber part of the exhaust gas and generate a first signal representative of the swing between th...
05/01/2001
6210641Air-fuel ratio control system and gas sensor for engines
An air-fuel ratio control system for a gas-fueled engine which is capable of achieving the combustion in a target air-fuel ratio to surely purify an exhaust gas through an exhaust purification catalyst. In the air-fuel ratio control system, a three-way ca...
04/03/2001
6085734Fuel multiplier transfer from dynamic crankshaft fueling control to oxygen sensor operation
A method is provided for controlling the delivery of fuel to an engine of an automotive vehicle equipped with a dynamic crankshaft fuel control system and an oxygen sensor feedback based fuel control system. The method includes determining an averaged com...
07/11/2000
6073619Air/fuel engine feedback control system and method
A fuel delivery control system suitable for use with internal combustion engines fueled by liquid propane gas or the like. A stepper motor actuated control valve 52, under the control of a closed-loop fuel control logic routine, meters the desired fuel de...
06/13/2000
6067794Dual control loop system and method for internal combustion engines
A method and system for controlling fuel injected into an internal combustion engine fitted with a catalytic converter. A signal outputted by a first feedback loop and derived from the output of a first probe upstream from the catalytic converter is corre...
05/30/2000
6029641Air-fuel ratio control system for internal combustion engines
An air-fuel ratio control system for an internal combustion engine includes an air-fuel ratio sensor arranged in the exhaust system of the engine. An ECU determines activation of the air-fuel ratio sensor and carries out feedback control of the air-fuel r...
02/29/2000
6026795Electronic device for controlling the air/fuel ratio of the mixture supplied to an internal-combustion engine
Control device in which a linear oxygen sensor arranged on a gas exhaust pipe of an internal-combustion engine upstream of a catalytic converter generates a signal supplied to a conversion circuit generating at its output a measured parameter representing...
02/22/2000
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