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US20120080016 INDIVIDUAL CYLINDER FUEL CONTROL SYSTEMS AND METHODS FOR OXYGEN SENSOR DEGREDATION  
A system includes an offset determination module and a correction determination module. The offset determination module determines an offset value based on an average response time of an exhaust...
US20120255532 CONTROLLER FOR INTERNAL COMBUSTION ENGINE  
In view of a difference in detectability of an air-fuel ratio sensor with respect to each cylinder, a first exhaust system model and a second exhaust system model are defined. The first exhaust...
US20150075507 CYLINDER-BY-CYLINDER AIR-FUEL-RATIO CONTROLLER FOR INTERNAL COMBUSTION ENGINE  
An ECU executes a cylinder-by-cylinder air-fuel-ratio control in which an air-fuel-ratio of each cylinder is estimated based on a detection value of an air-fuel-ratio sensor to adjust the...
US20150068505 CYLINDER-BY-CYLINDER AIR-FUEL-RATIO CONTROLLER FOR INTERNAL COMBUSTION ENGINE  
An air-fuel-ratio of each cylinder is estimated based on a detection value of an air-fuel-ratio sensor. An air-fuel-ratio detection timing determination is executed to determine whether a...
US20120255531 INTER-CYLINDER AIR/FUEL RATIO IMBALANCE ABNORMALITY DETECTION APPARATUS AND INTER-CYLINDER AIR/FUEL RATIO IMBALANCE ABNORMALITY DETECTION METHOD FOR MULTICYLINDER INTERNAL COMBUSTION ENGINE  
An inter-cylinder air/fuel ratio imbalance abnormality detection apparatus for a multicylinder internal combustion engine includes a fuel injection amount change control portion that executes a...
US20130186380 CONTROL SYSTEM FOR INTERNAL COMBUSTION ENGINE  
A control system for an internal combustion engine, wherein in the control system, an in-cylinder oxygen amount is calculated and a compression end temperature, which is a temperature of the...
US20100070157 METHOD AND DEVICES TO REDUCE THE DIFFERENCE BETWEEN NORMALIZED AIR-FUEL RATIO OF THE VARIOUS CYLINDERS IN AN INTERNAL COMBUSTION ENGINE AND A PREDETERMINED VALUE  
The invention relates to the field of methods and devices for reducing the difference between normalized air-fuel ratio of the various cylinders compared with a predetermined value between 0.7 and...
US20130061581 AIR-FUEL RATIO CONTROL SYSTEM FOR INTERNAL COMBUSTION ENGINE  
An oscillation signal is generated to oscillate the air-fuel ratio with a set frequency which is different from a 0.5th-order frequency (half of the frequency corresponding to a rotational speed...
US20090272367 Method And Device For Operating An Internal Combustion Engine  
By a respective cylinder-specific lambda regulator, a regulator value for influencing the air/fuel ratio in the respective cylinder is determined as a function of the cylinder-specific air/fuel...
US20090198434 ABNORMALITY DIAGNOSIS DEVICE OF INTERNAL COMBUSTION ENGINE  
A cylinder causing an abnormal air-fuel ratio is specified. Injection ratio changing control for gradually changing a ratio between command injection quantities of two injectors of the abnormal...
US20140326227 Method and Device for Operating an Internal Combustion Engine  
An internal combustion engine has a plurality of cylinders with fuel-metering injection valves, and an exhaust gas probe that generates a measurement signal characteristic of the air/fuel ratio in...
US20150167568 SYSTEMS AND METHODS FOR CONTROLLING EXHAUST GAS RECIRCULATION  
Various systems and method for controlling exhaust gas recirculation (EGR) in an internal combustion engine are provided. In one embodiment, a method includes injecting fuel to a subset of...
US20110214649 Control System for Gas Engine  
A control system for a gas engine including a controller being configured to execute load equalization control such that a fuel feed amount corresponding to a higher-temperature cylinder of a...
US20140360477 SYSTEM AND METHOD FOR DETERMINING VALVE OPERATION  
Systems and methods for determining operation of a cylinder deactivating/reactivating device are disclosed. In one example, degradation of the cylinder deactivating/reactivating device is based on...
US20170089277 CYLINDER-BY-CYLINDER AIR-FUEL RATIO CONTROLLER FOR INTERNAL COMBUSTION ENGINE  
When executing a Local-learning, an air-fuel ratio detecting time is corrected so that a dispersion of detection values of an air-fuel ratio sensor becomes a maximum value in one cycle of an...
US20160363077 FUEL SYSTEM ABNORMALITY DETECTING DEVICE OF INTERNAL COMBUSTION ENGINE  
An abnormality detecting device of an internal combustion engine, has a heat generation amount calculating portion for calculating a heat generation amount on the basis of an in-cylinder pressure...
US20160208723 SYSTEM AND PROCESS FOR PREDICTING AND PREVENTING PRE-IGNITION  
A process and a system for preventing pre-ignition in an internal combustion engine (ICE). The process includes providing an ICE that has a combustion chamber and an exhaust. Also provided is a...
US20160169134 METHOD FOR OPERATION OF AN INTERNAL COMBUSTION ENGINE  
A method for operating an internal combustion engine having a plurality of cylinders includes: measuring, by exhaust gas sensors arranged at an exhaust gas of every cylinder for which...
US20160123257 POST-CATALYST CYLINDER IMBALANCE MONITOR  
Methods and systems are provided for detecting cylinder air-fuel imbalance. In one example, a method may include adjusting engine operation based on an indication of cylinder air-fuel imbalance....
US20160061135 METHOD AND SYSTEM FOR PRE-IGNITION CONTROL  
Methods and systems are provided for reducing late burn induced cylinder pre-ignition events. Forced entry of residuals from a late burning cylinder into a neighboring cylinder may be detected...
US20160061127 ENGINE DIAGNOSTICS WITH SKIP FIRE CONTROL  
Methods and devices are described for performing engine diagnostics during skip fire operation of an engine while a vehicle is being driven. Knowledge of the firing sequence is used to determine...
US20160053701 INDIVIDUAL CYLINDER AIR-FUEL RATIO CONTROL DEVICE OF INTERNAL COMBUSTION ENGINE  
An individual cylinder air-fuel ratio estimation of estimating an air-fuel ratio of an individual cylinder is performed on a sensed value of an air-fuel ratio sensor set in an exhaust gas...
US20150345416 SYSTEM AND METHOD FOR DETECTING AIR FUEL RATIO IMBALANCE  
A system and method of detecting fueling imbalance(s) in an internal combustion engine is provided. The method includes receiving data regarding an oxygen content of engine exhaust for the engine...
Matches 1 - 23 out of 23