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7322339 Apparent torque reserve at idle for direct injected engines  
A fuel injection system for a direct fuel injection (DFI) engine is provided. The system includes: injection mode module selects a fuel injection mode to be one of a single injection mode and a...
7191771 Method for controlling an internal combustion engine having a lambda regulation  
The aim of the inventive method is to improve the emission values of an internal combustion engine during idling following a cold start. Said aim is achieved by inferring an adaptive value for the...
6976475 Method for detecting a leakage in the intake port of a combustion engine, and a combustion engine equipped for implementing the method  
In a combustion engine, the fuel quantity is determined as a function of the inflowing air mass. As a measure for the inflowing air mass, one uses either a main load signal, which is generated by...
6850835 On engine trim for fuel injectors  
A method and apparatus for trimming a fuel injector located on an engine. The method and apparatus includes modifying an engine speed control, interrupting at least one injection event, monitoring...
6848418 External exhaust gas recirculation on board diagnostic using EGR effect on a combination of engine operating parameters  
A system is described for determining degradation of an exhaust gas recirculation system of an internal combustion engine. This method utilizes a combination of parameters to accurately determine...
6820604 System with an offset learn function and a method of determining a throttle-position sensor offset  
A fuel injection system in an engine. The system includes a throttle body having a throttle valve, a first sensor, and a control unit coupled to the first sensor. The first sensor measures a sensed...
6684869 System and method for detecting an air leak in an engine  
A system and method for detecting an air leak within an engine is provided. The engine includes an intake manifold communicating with an engine cylinder. The method includes measuring an exhaust...
6609509 LPG-engine fuel control apparatus  
LPG decompressed in a regulator is fed as primary fuel into an intake passage from a carburetor, and is fed as supplementary fuel to the intake passage from an injector. An ECU controls a control...
6491032 Marine engine control system  
An outboard motor comprises an engine mounted within an engine compartment. The engine comprises an induction system having an induction passage extending between a plenum chamber and a combustion...
6467471 Air-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...
6374812 Method of regenerating an activated-carbon canister  
The fill level of an activated-carbon canister is calculated during the regeneration process in a lean burn combustion engine. While the engine is in idle operation, the fuel mass reduction that is...
6308698 Method and apparatus for controlling fuel injection in diesel engine  
An arrangement for controlling fuel injection in a diesel engine to prevent generation of smoke even when an accelerator pedal is stamped during idling. A basic amount of fuel injection Q base is...
6148611 Engine air-fuel ratio controller and control method  
When an engine (1) is in an idle state and the engine rotation speed exceeds a predetermined value, fuel supply is stopped. In this state, fuel supply is resumed when there is a shift to a non-idle...
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...
6055971 Plateau linearization curves with proportional/integral/derivative control theory  
A proportional/integral/derivative control system is provided for controlling the operating parameters of a feedback system according to the difference between a measured value from a component of...
6019093 Air-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, for detecting the air-fuel ratio of exhaust gases...
5960773 Engine control apparatus  
When feedback control of air/fuel ratio is not being performed in an engine and the engine is idling, the fuel supply amount is increased according to the engine coolant temperature. When feedback...
5934248 Air-fuel ratio controller for internal combustion engine  
An air-fuel ratio controller for an internal combustion engine, which controller is capable of: properly correcting an air-fuel ratio after a start-up explosion; preventing inconveniences such as...
5918583 Air-fuel ratio control device for internal combustion engine  
An air-fuel ratio control device for an internal combustion engine of a vehicle is disclosed. The device controls the air-fuel ratio with a target value which is larger than the stoichiometric...
5720266 Control system for a gaseous fuel internal combustion engine utilizing PID gain scheduling parameters  
A fuel control system is provided for use with an internal combustion engine having at least one cylinder, a source of gaseous fuel and an intake passageway for fluidly connecting the air intake to...
5685283 Air-fuel ratio control system for engine  
An air-fuel ratio control system for an engine for controlling an amount of a fuel mixture to be delivered into a combustion chamber so that an air-fuel ratio of the fuel mixture attains a target...
5638800 Method and apparatus for controlling air-fuel ratio learning of an internal combustion engine  
An object of the present invention is to carry out air-fuel ratio learning to a high accuracy even in a region such as the idling region wherein the number of acquisitions of air-fuel ratio...
5615660 Engine air-fuel ratio controller  
A warmup fuel amount corresponding to a predetermined heavy fuel is set to control an air-fuel ratio of an air-fuel mixture supplied to an engine during warmup. A correction amount based on a...
5611319 Air fuel ratio control system for engine with fuel vapor recovery system  
An air fuel ratio control system is so arranged to restrain a undesired variation of an air fuel ratio due to an on off control of a canister purge and thereby prevent deterioration of an exhaust...
5592387 Method of operating a natural gas vehicle as a function of ambient methane concentration  
A method of controlling operation of a compressed natural gas vehicle as a function of a predetermined level of methane in the ambient. Vehicle ignition is turned off when a predetermined level of...
5575266 Method of operating gaseous fueled engine  
A gaseous fueled engine and method for controlling the gaseous fuel supply using a feedback control to maintain a stoichiometric mixture under all normal running conditions. The feedback control is...
5483946 Engine control system with rapid catalyst warm-up  
Air/fuel and ignition control of engine (28) are used to more rapidly heat-up a catalytic converter (52). A control system (8) generates a fuel command (100) for fuel delivery to the engine (28)...
5469831 Fuel supply control system for an automotive engine  
A fuel supply control system for an automotive engine determines a property of the fuel, such as the fifty percent distillation temperature T 50 thereof, and the fuel injectors of the engine are...
5381776 Air-fuel ratio control system for engine  
An air-fuel ratio control system for an engine, to which evaporated fuel in a canister is supplied, is used for feedback controlling an air-fuel ratio based on a feedback control value calculated...
5261382 Fuel injection system  
An electronic fuel injection system operable as a bolt on retro fit replacement for a wide variety of carburetors is disclosed. The system includes a throttle body-injector assembly which, by means...
5168859 Method and apparatus for judging misfire in internal combustion engine  
In an internal combustion engine where in a predetermined driving state, the air-fuel ratio is feedback-controlled based on a detection signal of an air-fuel ratio sensor and in other driving...
5150696 Adaptive memory control for normalized dilution  
An internal combustion engine air-fuel ratio control method and apparatus wherein a most favorable parameter selected from the group consisting of air, fuel, and recirculated exhaust gas is...
5095878 Air/fuel ratio control system for internal combustion engine  
An air/fuel ratio control system is provided for use with an internal combustion engine. The system includes a first air/fuel ratio detector arranged on an upstream side of a catalytic converter so...
5065727 Air/fuel ratio control system for internal combustion engine  
An air/fuel ratio control system for internal combustion engines performs λ control by using α correction coefficients variable depending upon oxygen concentration in the exhaust gas. The system...
5033440 Apparatus for controlling air/fuel ratio of internal combustion engine  
An apparatus is provided for controlling the air/fuel ratio of an internal combustion engine. The apparatus includes a sensor disposed in an exhaust system for detecting components of exhaust gas,...
4895122 Air-fuel ratio feedback control method for internal combustion engines  
A method of controlling in a feedback manner the air-fuel ratio of an air-fuel mixture supplied to an internal combustion engine having a first fuel injection valve and a second fuel injection...
4805578 Air-Fuel ratio control system for internal combustion engine  
An air-fuel ratio control system realized with a computer for an internal combustion engine is disclosed, wherein an idle discriminator unit discriminates whether the internal combustion engine is...
4751909 Fuel supply control method for internal combustion engines at operation in a low speed region  
A fuel supply control method for controlling the quanity of fuel being supplied to an internal combustion engine, in a feedback manner responsive to the output of a means for detecting the...
4744345 Air-fuel ratio feedback control method for internal combustion engines  
A method of controlling in a feedback manner the air-fuel ratio of an air-fuel mixture supplied to an internal combustion engine to desired values by correcting the fuel quantity supplied to the...
4612892 Air-fuel ratio control system  
An air-fuel ratio control system for an internal combustion engine has an electromagnetic valve for correcting the air-fuel ratio of air-fuel mixture, an O 2 sensor for detecting oxygen...
4589390 Air-fuel ratio feedback control method for internal combustion engines  
A method of effecting feedback control of the air-fuel ratio of an air-fuel mixture being supplied to an internal combustion engine, by correcting a basic fuel supply quantity by the use of a...
4584982 Arrangement for a fuel metering system for an internal combustion engine  
The invention is directed to an arrangement for a fuel metering system for an internal combustion engine. The arrangement includes a computer unit for generating a fuel metering signal in...
4513711 Apparatus for regulating the idling speed of internal combustion engines  
In a system for regulation of the idling speed of an internal combustion engine acting through an electrical positioning means for the minimum-opening position of the throttle valve, the...
4501240 Idling speed control system for internal combustion engine  
An engine idling speed control system for an internal combustion engine which controls engine idling speed by adjusting the amount of intake air by-passing the throttle valve on the basis of the...
4501243 Air-fuel ratio control apparatus  
In an air-fuel ratio control apparatus for engines, when a vehicle is brought to a stop and the engine comes into an idling operation, the average value of air-fuel ratio correction amount is...
4492195 Method of feedback controlling engine idle speed  
Engine idle speed is feedback controlled on the basis of multivariable control method by using mathematical dynamic models to determine engine state variables. In the present invention, low-order...
4454846 Method and apparatus for controlling the air-fuel ratio in an internal-combustion engine  
In an internal-combustion engine disposed in a vehicle, when the engine is in an idle state and the vehicle speed is not equal to zero and is less than a predetermined value, the air-fuel ratio of...
4430979 Air-fuel ratio control system  
A system for controlling air-fuel ratio for a carburetor for an internal combustion engine having an induction passage, a throttle valve, an exhaust passage, an exhaust gas detector such as oxygen...
4376427 Engine air/fuel ratio control system with both normal idling and idle up idling capability  
An engine includes a three way catalytic converter in its exhaust system, and a carburetor whose throttle valve has a normal and an idle up idling position, selected between by an idle up device. A...
4365603 System for controlling air-fuel ratio  
A system for controlling air-fuel ratio for a carburetor for an internal combustion engine having an intake passage, on air-fuel mixture supply device, a throttle valve, an exhaust passage, a...
Matches 1 - 50 out of 63 1 2 >