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7540279 High efficiency stoichiometric internal combustion engine system  
A power system including a stoichiometric compression ignition engine in which a roots blower is positioned in the air intake for the engine to control air flow. Air flow is decreased during part...
7516731 Apparatus and method for controlling internal combustion engine  
A control apparatus of an engine having a compression ignition combustion mode and a spark ignition combustion mode selects the spark ignition combustion mode when operation conditions fall within...
7469685 Control apparatus for internal combustion engine  
The control apparatus for the internal combustion engine increases a fuel injection amount under predetermined conditions, such as after the start of the internal combustion engine, at cold time,...
7451754 Control system for internal combustion engine  
A control system for an internal combustion engine, which is capable of enhancing the accuracy of fuel control and ignition timing control even when there is a possibility that the reliability of a...
7448369 Method for controlling a fuel injector  
A method of controlling a fuel injector is disclosed. Multiple airflow rate regimes are associated with different fuel injection control methods. In one example, a low airflow rate regime is...
7380396 Method for protecting an exhaust aftertreatment system  
The method of the present invention is adapted to protect an exhaust aftertreatment system by preventing the system from becoming clogged and/or damaged during periods of light engine load....
7370470 Method for increasing the exhaust gas temperature of internal combustion engines  
A method for increasing the exhaust gas temperature of internal combustion engines, particularly for driving a motor vehicle under load in order to reach the necessary regeneration temperature of...
7324889 Intake-air quantity control system of engine  
In an intake-air quantity control system of an engine employing a variable valve operating device capable of controlling a cylinder intake-air quantity by variable control of an operating...
7305977 System for controlling regeneration of lean NOx traps  
A control system and method for controlling torque output of an engine include an air control module that receives an actual airflow and a desired airflow and outputs an adjusted actual airflow...
7293556 Method of controlling the injection begin of a fuel injection valve of an internal combustion engine  
In a method of controlling an internal combustion engine wherein an injection begin is calculated depending at least on an actual engine speed and the injection begin is corrected, the injection...
7273046 Air-fuel ratio controller for internal combustion engine and diagnosis apparatus for intake sensors  
A computer calculates an estimated cylinder-intake-air amount based on outputs from an airflow meter and a throttle position sensor, and then calculates a reference cylinder-intake-air amount based...
7255098 Engine emissions control system  
An engine emissions control system is provided. The system may include an exhaust producing engine and an exhaust system through which the exhaust produced by the engine may flow. The system may...
7181908 Torque compensation method for controlling a direct-injection engine during regeneration of a lean NOx trap  
A torque compensation method for controlling a direct-injection gasoline engine during regeneration of a lean NOx trap disposed in an exhaust path of the engine determines a desired torque in...
7151994 Calculation of air charge amount in internal combustion engine  
Calculation models ( 22, 24 ) for an in-cylinder air charge amount determine an estimated intake air pressure (Pe) based on an intake air flow rate (Ms), and then determine an air charge amount...
7150275 Method 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 set torque is computed from an input variable that represents the desired power, and the set torque is limited...
7128065 Method and device for controlling an internal combustion engine  
A method and a device are described for controlling an internal combustion engine. On the basis of the comparison of a setpoint value with an actual value for a variable that characterizes the...
7121255 Strategy for fueling a diesel engine by selective use of fueling maps to provide HCCI+RVT, HCCI+IVC, HCCI+IVC+EVC, and CD+RVT combustion modes  
A compression ignition engine ( 60 ) has a control system ( 66 ) for processing data, one or more combustion chambers ( 62 ), and fuel injectors ( 64 ) for injecting fuel into the chambers. The...
7063076 Method of smoke limiting engine  
Method of smoke limiting an engine. The method may include determining a minimum air/fuel (AFR) ratio and fuel limiting as a function thereof. The method may include determining a maximum fueling...
6978774 Emission control valve for gas-fueled engines  
An emission control device for use with stationary or mobile gas-fueled internal combustion engines is described, which is placed in the fuel supply line and operates with full fuel authority. An...
6899093 Control system for NOx control for cam phaser and/or EGR systems  
A vehicle control system regulates oxides of nitrogen levels in vehicle emissions. Recirculation of exhaust gas in an engine is controlled with an exhaust gas regulator valve and/or a cam phaser....
6857421 Method for operating a diesel engine, and diesel engine  
In a method for operating a diesel engine and a diesel engine, wherein engine emission control is provided by switching between a lean mode with superstoichiometric combustion air ratio λ>1 and...
6843229 Displacement on demand fault indication  
An engine control system for monitoring torque increase during cylinder deactivation for a displacement on demand (DOD) engine includes a throttle and a controller. The controller adjusts a preload...
6837233 System for enhancing performance of an internal combustion engine  
A system for improving the performance of a motor vehicle internal combustion engine includes a controller positioned between an O 2 sensor. The controller alters the O 2 sensor signals and...
6827069 Detection of fuel dynamical steady state  
An engine control system that identifies fuel dynamical steady state (FDSS) includes a cylinder and a controller that determines a detection period. The controller monitors a mass of fuel ingested...
6820603 Control system and control method for internal combustion engine, and engine control unit  
There is provided a control system for an internal combustion engine, which is capable of meeting a driver's demand of torque, and achieving high combustion efficiency and high emission-reducing...
6718253 Method for forming an actuating variable  
A method for forming an actuating variable to be output periodically by a control unit in output periods for controlling an apparatus, in particular the ignition or fuel injection of internal...
6708681 Method and device for feedback controlling air-fuel ratio of internal combustion engine  
An air-fuel ratio detected by an air-fuel ratio sensor is estimated based on an estimation value of air-fuel ratio of an air-fuel mixture formed inside a cylinder, and based on an air-fuel ratio...
6701244 Excess air factor control device for internal combustion engine  
A basic target excess air factor tLAMBDA0 and a target fresh air intake amount tQac are set base upon the operation condition of an engine ( 30 ). A target excess air factor tLAMBDA is calculated...
6694961 Internal combustion engine  
An internal combustion engine including a combustion chamber, an intake air passage communicated with the combustion chamber, an intake valve having a thermal insulator at an air-exposure portion...
6672284 Fuel supply amount control apparatus for internal combustion engine  
When control conditions are satisfied, an A/F value is estimated from an average value of rotation speed Ne and an increasing rotation speed ΔNe calculated. The estimated A/F value as a base is...
6640775 Air-fuel ratio control system for internal combustion engine  
An air-fuel ratio control system for an internal combustion engine is comprised of an engine condition detecting unit and a control unit. The control unit is arranged to calculate a target engine...
6591811 Device for controlling an internal combustion engine  
A device for controlling an internal combustion engine having an arrangement for recording operating parameters of the internal combustion engine, such as engine speed, load, and coolant...
6575152 Method for controlling the titre of the exhaust gases in an internal combustion engine  
A method for controlling the titre of the exhaust gases in an internal combustion engine. An oxygen sensor provides a signal indicative of a titre (lambda) of the exhaust gases. The method includes...
6453896 Air-fuel ratio feedback control apparatus and method of internal combustion engine  
A non-linear term U NL is computed as U NL =gain G NL ×(air-fuel ratio detection value−target air-fuel ratio)/(|air-fuel ratio detection value−target air-fuel ratio|)+previous value U NL ...
6453895 Feedback control device and feedback control method of air-fuel ratio in internal combustion engine  
An air-fuel ratio feedback control of an internal combustion engine is performed, by a sliding mode control, by computing an air-fuel ratio feedback control amount including a linear term and a...
6453229 Air-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...
6442455 Adaptive fuel strategy for a hybrid electric vehicle  
This invention is a method and system for a hybrid electric vehicle adaptive fuel strategy to quickly mature an adaptive fuel table. The strategy adaptively alters the amount of fuel delivered to...
6374817 Application of OP-AMP to oxygen sensor circuit  
A circuit for improving the resolution of an oxygen sensor in a vehicle exhaust system. The circuit expands a limited output voltage range of an oxygen sensor to full voltage range of an...
6302091 Air-fuel ratio feedback control for engines having feedback delay time compensation  
In an air-fuel ratio feedback control system for engines, a feedback correction amount is calculated in response to an air-fuel ratio detected at an engine exhaust side to effect an air-fuel ratio...
6298840 Air/fuel control system and method  
A method and system is provided for improving the adjustment of fuel levels delivered to an internal combustion engine. A controller 15 calculates commanded air-fuel levels to deliver to the engine...
6253546 Torque control scheme for low emission lean burn vehicle  
A method of minimizing torque disturbances in an internal combustion engine for a vehicle having a lean NOx trap that is periodically purged. The method includes the steps of generating feedforward...
6250291 Method for controlling an internal combustion engine equipped with a device for recycling exhaust gases  
6196197 Engine control apparatus and method having cylinder-charged air quantity correction by intake/exhaust valve operation  
A basic cylinder-charged air quantity is determined by a first-order delay processing of an intake air quantity per rotation. Next, an estimated value of a change portion of the cylinder-charged...
6176224 Method of operating an internal combustion engine which uses a low energy gaseous fuel  
A method of controlling a internal combustion engine assembly is disclosed. The internal combustion engine assembly includes (i) a internal combustion engine having an engine inlet and an engine...
6155242 Air/fuel ratio control system and method  
An air/fuel ratio control method for an internal combustion engine corrects airflow prediction errors. The method compares the current airflow to the value that was predicted several events in the...
6148809 Oxygen sensor controlled continuous flow fuel system  
A continuous flow fuel system includes an oxygen sensor for analyzing the exhaust gases of an engine. The output from the oxygen sensor, representing the oxygen content in the exhaust gases, is...
6098605 Method and apparatus for operation of an internal combustion engine in a true closed loop fuel control  
A true closed-loop air/fuel ratio control system for an internal combustion engine which uses a cylinder air charge percentage value also known as a cylinder or engine load value, is used to...
6076510 Method and apparatus for correcting air-flow sensor output and adapting data map used to control engine operating parameters  
The apparatus for correcting air-flow sensor output includes an air-flow sensor sensing an air-flow in an intake of an engine, and other sensors sensing operating conditions of the engine. An...
6073619 Air/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...
6029642 Method for forming a fuel-metering signal for an internal combustion engine  
The invention is directed to a method for computing a fuel-metering signal for adjusting a pregiven lambda value for the composition of the air/fuel mixture of an internal combustion engine. In the...
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