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7614392 Diagnostic method and control apparatus for gas sensor  
A gas sensor diagnostic method includes: a fuel supply detecting step of detecting an interruption of a fuel supply to the internal combustion engine, and a restart of the fuel supply after the...
7614212 Engine control apparatus  
An engine control apparatus is configured to prevent damage to a catalytic converter caused by the occurrence of temperature differences. The engine control apparatus is particularly useful in a...
7610903 Multicylinder internal combustion engine  
A multicylinder internal combustion engine, which can simplify its control and is advantageous against thermal loads or vibrations includes a cylinder head with intake valves and exhaust valves...
7600503 Flex-fuel variable displacement engine control system and method  
A method for operating an engine having at least one cylinder that may be deactivated and a fuel system operating with an alcohol fuel blend, comprising of adjusting a range of operating parameters...
7584606 System for assisting the regeneration of depollution means integrated in an exhaust line of a vehicle diesel engine  
System in which the depollution apparatus is associated with an oxidation catalyst-forming device, and the engine is associated with a common rail for feeding it with fuel and adapted to implement...
7581531 Method for operating an internal combustion engine  
An internal combustion engine includes multiple cylinders. A partial set of the cylinders may be temporarily shut off. Fuel is introduced briefly into at least one of the shut off cylinders and...
7565899 Engine fueling control during cylinder valve mode transitions  
A method of control fueling of a cylinder in an internal combustion engine, the cylinder having at least two intake valves, the method comprising of operating in a first mode with one active intake...
7555896 Cylinder deactivation for an internal combustion engine  
A system and method to control engine valve operation during periods of cylinder deactivation of an internal combustion engine. Electromechanical valves are controlled in a manner to reduce fuel...
7549408 Flex-fuel variable displacement engine control system and method  
A method for operating an engine having at least one cylinder that may be deactivated and a fuel system operating with an alcohol fuel blend, comprising of adjusting a range of operating parameters...
7526375 Torque based fuel cut-off  
An engine control system is provided. The system includes: an engine torque module that estimates torque output based on charge energy; and a cylinder mode module that controls fuel cut-off and...
7497805 System and method to control fuel injector reactivation during deceleration fuel shut off  
A method of controlling fuel injection in an engine of a vehicle comprises reactivating fuel injectors based on release or decrease of driver braking during deceleration fuel shut off operation....
7481039 Engine system and method for efficient emission control device purging  
Various systems and methods are disclosed for carrying out combustion in a fuel-cut operation in some or all of the engine cylinders of a vehicle. Further, various subsystems are considered, such...
7478625 Engine cranking system with cylinder deactivation for a direct injection engine  
An engine cranking system includes fuel injectors that are associated with multiple combustion chambers of an engine. The fuel injectors include a first fuel injector that is associated with a...
7478620 Method and apparatus to control a transition between HCCI and SI combustion in a direct-injection gasoline engine  
A method to operate a multi-cylinder direct-injection engine in one of a controlled auto-ignition and a spark-ignition combustion mode is described. Engine operation and an operator torque request...
7469530 Fuel cut control apparatus of internal combustion engine  
The exhaust gas purifying catalysts sometimes generate H 2 S which emits exhaust odor under reducing atmosphere. However, in the ordinary air-fuel ratio control, it takes much time to establish...
7461627 Hybrid combustion in a diesel engine  
A compression ignition engine ( 10 ) has a control system ( 40 ), one or more combustion chambers ( 12 ), and fuel injectors ( 42, 44 ) for injecting fuel into the combustion chambers. The control...
7430854 Air fuel ratio controller for internal combustion engine for stopping calculation of model parameters when engine is in lean operation  
An air fuel ratio controller for an internal combustion engine includes an exhaust gas sensor, an identifier and a control unit. The exhaust gas sensor detects oxygen concentration of exhaust gas....
7428893 Electronic flow control valve  
An internal combustion engine is provided that includes a high pressure feed line, and a plurality of fuel injectors fluidly connected to the high pressure feed line, each being operable to inject...
7426918 Engine having multiple injector locations  
A method for controlling a first and second injector of an engine, the first injector located in a first cylinder of the engine and the second injector located upstream of, and configured to inject...
7421836 Air/fuel ratio validation for lean burn  
A multi-cylinder group engine system operable in at least a first mode and a second mode, where in the first mode a first and second cylinder group combust air and fuel, and where in the second...
7395813 Method of controlling the intake and/or the exhaust of at least one deactivated cylinder of an internal-combustion engine  
A method controls the intake and/or the exhaust of at least one deactivated cylinder ( 10, 12, 14, 16 ) of an internal-combustion engine operating in four phases. The cylinder includes an intake...
7383813 Method and device for controlling the transition between normal operation and overrun fuel cut-off operation of an Otto engine operated with direct fuel injection  
The problem during overrun fuel cut-off operations, i.e. cut-off of fuel injection during trailing throttle conditions of the vehicle, is that the transition entails an undue torque jump, resulting...
7367322 Controller of an internal combustion engine  
When the first fuel injection is performed after reversion from the fuel cut, the fuel pulse width Ka·INJ.PW is set so that a fuel supply amount is greatly increased in relation to an intake air...
7363915 Method to control transitions between modes of operation of an engine  
A method is disclosed for controlling operation of an engine coupled to an exhaust treatment catalyst. Under predetermined conditions, the method operates an engine with a first group of cylinders...
7343902 Dual combustion mode engine  
A system and method to provide a desired torque increase from an engine in which some cylinder operate in spark ignition (SI) combustion mode only and some cylinders operate in homogeneous-charge,...
7331332 Method for operating an internal combustion engine  
An internal combustion engine includes multiple combustion chambers. The supply of fuel into at least one subset of the combustion chambers can temporarily be interrupted. It is provided that the...
7328686 System and method to control cylinder activation and deactivation  
Engine cylinder reactivation from a fuel-cut state is controlled based on a calculated future engine speed and a minimum allowable engine speed. The future engine speed is calculated based on the...
7302932 Pre-ignition detection and mitigation  
A system and method for detecting and mitigating preignition for a multi-cylinder engine is provided. According to one aspect of the disclosure, a method is provided including identifying a...
7293545 Method for enlarging the control range for equalizing injection quantity differences  
In a method for enlarging the control range for equalizing injection quantity differences, in particular in internal combustion engines using multiple injections, if the maximum injection quantity...
7290531 Integrated fuel supply system for internal combustion engine  
An electronic fuel injection system is combined with a carburetor in a carbureted internal combustion engine. The resulting air/fuel induction system comprises a carburetor air/fuel induction...
7287513 Method for controlling the intake valves of an internal combustion engine  
The invention relates to a method for controlling the opening and closing of the intake valves of an internal combustion engine with a direct fuel injection system, comprising at least one first...
7284538 Rotation angle sensing device  
A rotation angle sensing device calculates an average value of calculation values of time necessary for rotation of each one of sections provided by equally dividing one rotation of a crankshaft....
7234446 Misfire detector for multi-cylinder engine  
A misfire detector prevents catalysts from being heated to damaging high temperatures. The misfire detector for a multi-cylinder engine includes a fuel cut control to stop supplying fuel to...
7231907 Variable incremental activation and deactivation of cylinders in a displacement on demand engine  
A method of regulating displacement in a displacement on demand engine includes determining a desired engine displacement and determining a current engine displacement. The method further includes...
7216640 Engine control to compensate for fueling dynamics  
A method for calculating transient fuel wall wetting characteristics of an operating engine is described. The method accounts for cylinder valve deactivation of cylinders in the engine in...
7204235 Method of managing engine torque upon loss of engine coolant  
An engine torque management system of a V-style engine utilizes a cylinder head metal temperature sensor in each cylinder head to detect a temperature. When the sensor temperature rises above a...
7204226 Multi-cylinder internal combustion engine and method for the individual shutdown and restart of its cylinders  
In a method for the individual shutdown and restart of cylinders of a multi-cylinder internal combustion engine having at least one intake and one exhaust valve per cylinder, a variable valve...
7203588 Control device for multi-cylinder internal combustion engine and signaling device capable of providing same with information  
A control device for an engine, which includes a plurality of cylinders, an electronically controlled unit injector for injecting fuel into each cylinder, and an electronically controlled valve...
7198029 Extension of DOD operation in torque control system  
An engine control system for regulating a torque output of a variable displacement engine includes a first module that calculates a torque modification term based on an engine operating parameter...
7191761 Control apparatus for internal combustion engine  
An engine ECU executes a program including the steps of: determining presence of abnormality in a high-pressure fuel system; when abnormality is sensed in the high-pressure fuel system, and not in...
7188468 Controller for cylinder cut-off for multi-cylinder internal combustion engine  
A controller for cylinder cut-off for a multi-cylinder internal combustion engine including a partially operable cylinder that can be cutoff by a cut-off cylinder mechanism provided therewith and a...
7181905 Lean-burn engine exhaust air-fuel and temperature management strategy for improved catalyst durability  
A system is described for improving engine and vehicle performance by considering the effects of exhaust conditions on catalyst particle growth. Specifically, engine operation is adjusted to reduce...
7156072 Computer controlled engine valve operation  
An electronic valve actuation system and control method is described. The valve timing is changed between early and late intake valve closing depending on engine operating conditions. Further,...
7146966 Cylinder cutoff control apparatus of internal combustion engine  
A cylinder cutoff control apparatus of an engine initiates a cylinder cutoff mode only when two conditions, namely a low load condition such as a vehicle cruising condition and an intake valve...
7143727 Exhaust reductant generation in a direct injection engine with cylinder deactivation  
A method for operating an internal combustion engine having at least a first and second cylinder, comprising during at least one operating condition, operating the first cylinder to receive...
7143577 Air-fuel ratio control apparatus of internal combustion engine  
An air-fuel ratio control apparatus of an internal combustion engine in which an exhaust gas purifying catalyst is disposed in an exhaust passage, comprises: fuel cut means which stops fuel supply...
7140355 Valve control to reduce modal frequencies that may cause vibration  
A method to reduce chassis vibration in an engine with valves that may be deactivated. Valves are controlled to avoid exciting modal frequencies of mechanical components and systems.
7131424 Method for injecting fuel into a combustion chamber of an internal combustion engine  
In a method of injecting fuel into the combustion chambers of an internal combustion engine having a plurality of cylinders, wherein a main injection process and a variable number of secondary...
7107947 Multi-stroke cylinder operation in an internal combustion engine  
A method to control valves during multi-stroke cylinder operation. Valves are controlled to improve emissions and engine torque resolution.
7104047 Air-fuel ratio control device for internal combustion engine  
An integral operation in an upstream target-value varying part is stopped in response to transition to a fuel cutoff state to maintain an integral value concerning a downstream side. Thereafter, at...
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