Matches 1 - 50 out of 118 1 2 3 >
Match Document Document Title
7603994 Abnormality diagnosis device and control system for internal combustion engine  
An exhaust gas discharged from a combustion chamber of each cylinder flows near an air-fuel ratio sensor via a junction. An ECU estimates an air-fuel ratio of each cylinder based upon a sensing...
7597091 Air-fuel ratio control apparatus and method for an internal combustion engine  
When an internal combustion engine including a plurality of cylinders is operating steadily, an index value relating to an actual hydrogen content in exhaust gas downstream of a portion where...
7562653 Method for detecting a cylinder-specific air/fuel ratio in an internal combustion engine  
An internal combustion engine comprising several cylinders provided with injection valves associated with the cylinders admeasuring fuel. An exhaust gas probe is arranged in an exhaust gas tract...
7520265 Fuel injection controller  
A fuel injection device calculates a variation correction value by incorporating in-cylinder pressure into injector individual data based on an injection rate of an injector measured outside a...
7519467 Cylinder air-fuel ratio controller for internal combustion engine  
An air-fuel ratio of each cylinder is estimated on the basis of the detection value of an air-fuel ratio sensor disposed in an exhaust confluent portion. An air-fuel ratio correction quantity is...
7500470 Cylinder torque balancing for internal combustion engines  
An engine torque control system for balancing torque output across cylinders of an internal combustion engine includes a first module that determines a derivative term for each cylinder of the...
7497210 Air-fuel ratio detection apparatus of internal combustion engine  
In a multi-cylinder engine, to compute the air-fuel ratio of each cylinder by an air-fuel ratio sensor disposed in an exhaust pipe, a cylinder is determined by a crank angle detected by a crank...
7483782 Method of estimating the fuel/air ratio in a cylinder of an internal-combustion engine by means of an adaptive nonlinear filter  
The present invention relates to a method of estimating the fuel/air ratio in each cylinder of an injection internal-combustion engine comprising an exhaust circuit on which a detector measures the...
7469693 Advanced engine management of individual cylinders for control of exhaust species  
A method and system controls engine-out exhaust species of a combustion engine having a plurality of cylinders. The method typically includes various combinations of steps such as controlling...
7455048 Method for operating an internal combustion engine, and a control device therefor  
A method of monitoring proper operation of an internal combustion engine by analyzing an engine speed includes the following steps: determination of an acceleration characteristic for each...
7441554 Engine 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...
7431016 System for controlling evaporative emissions  
A control system for controlling a valve in a fuel system of engine including an engine airflow sensor that senses a mass engine airflow (M engair ), a barometric pressure sensor that senses a...
7409284 Apparatus for estimating air-fuel ratios and apparatus for controlling air-fuel ratios of individual cylinders in internal combustion engine  
An individual-cylinder air-fuel ratio estimation model is designed so as to consider the mixing of gases exhausted from adjacent combustion cylinders, and a movement by which a mixed gas arrives at...
7398772 Control apparatus for multi-cylinder internal combustion engine and control method  
A control apparatus calculates a exhaust gas air-fuel ratio of a plurality of cylinders, in which the operation angle of an intake valve is set to a predetermined operation angle, e.g., a maximum...
7392789 Method for synchronizing cylinders in terms of quantities of fuel injected in an internal combustion engine  
In an adaptation ( 4, 5, 6, 7 ) of differences in injected quantities within high operating ranges, the differences are based on an injection parameter and are determined by regulating an irregular...
7387116 Piston engine and respective operating method  
An operating method is for a piston engine ( 1 ). The piston engine includes a plurality of cylinders ( 6 ) having intake valves ( 9 ), exhaust valves ( 10 ), combustion chambers ( 7 ), and pistons...
7383116 Method and device for controlling an internal combustion engine  
A method and a device for controlling an internal combustion engine, in which a noise variable is compared to a setpoint value, and an actuating variable is specified based on the comparison. The...
7379810 Engine control system and engine control method  
An engine control system and an engine control method are disclosed wherein a combustible component quantity of intake air, reflecting combustible components in a crankcase of an engine, is...
7377262 Air-fuel ratio controlling apparatus for an engine  
An air-fuel ratio controlling apparatus includes an internal pressure detector for detecting an internal pressure of a combustion chamber of the engine. The apparatus estimates a motoring pressure...
7356985 Air-fuel ratio controller for internal combustion engine  
A target air-fuel ratio setting part has a sub-feedback part, a target air-fuel ratio enriching part, and a target air-fuel ratio changeover part. The sub-feedback part variably sets a target...
7337771 Method and apparatus for the cylinder-specific determination and control of a fuel injection quantity  
In a method and apparatus for the cylinder-specific determination and control of a fuel injection quantity for a multi-cylinder internal combustion engine, the exhaust gas pressures of the...
7305972 Method of controlling an internal combustion engine  
In a method of controlling an internal combustion engine having a common rail fuel injection system including individual fuel storage chambers, wherein the pressure pattern of the fuel supplied to...
7287525 Method of feedforward controlling a multi-cylinder internal combustion engine and associated feedforward fuel injection control system  
The amount of fuel to be injected in each cylinder of a multi-cylinder spark ignition internal combustion engine may be determined with enhanced precision if the fuel injection durations are...
7284545 Device 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...
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...
7216638 Control of exhaust gas stoichiometry with inducted secondary air flow  
A method for operating a marine engine uses four valves to control the flow of secondary air that is inducted into each of the cylinders of an engine. An oxygen sensor is disposed in an exhaust...
7207316 Control apparatus and control method for internal combustion engine  
An internal combustion engine ( 1 ) generates power by burning a mixture of fuel and air in each combustion chamber 3 . The internal combustion engine 1 is provided with an in-cylinder pressure...
7163007 Control system for internal combustion engine  
A control system for an internal combustion engine, which is capable of optimally controlling fuel injection by an injector even in a transient state of the engine. An ECU 2 of the engine...
7117861 Method for controlling an internal combustion engine  
A method for controlling an internal combustion engine in which in each case the lambda value is ascertained by evaluating a measuring signal of a lambda probe. In this context, two combustion...
7111593 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...
7089922 Apparatus, system, and method for minimizing NOx in exhaust gasses  
An apparatus, system, and method are disclosed for minimizing NO x in exhaust gasses. The apparatus includes an ionization module configured to at least partially ionize an exhaust gas of an...
7086391 Method of estimating the fuel/air ratio in a cylinder of an internal-combustion engine  
The present invention relates to a method of estimating the fuel/air ratio in each cylinder of a multicylinder internal-combustion engine comprising an exhaust circuit in which a single detector...
7063080 Cylinder-by-cylinder air-fuel ratio controller for internal combustion engine  
An air-fuel ratio sensor detects an air-fuel ratio of an exhaust gas at a confluent portion of an exhaust gas. An air-fuel ratios in each cylinder are estimated to be controlled based on an output...
7051725 Cylinder-by-cylinder air-fuel ratio calculation apparatus for multi-cylinder internal combustion engine  
An air-fuel ratio deviation calculated by an air-fuel ratio deviation calculation part is inputted to a cylinder-by-cylinder air-fuel ratio estimation part. A cylinder-by-cylinder air-fuel ratio is...
7047957 Method and apparatus for monitoring a multiple step valve lifter  
A method and system for monitoring performance of an internal combustion engine equipped with individually actuated valve control mechanisms, such as a two-step finger-follower rocker-arm assembly,...
7032581 Engine air-fuel control for an engine with valves that may be deactivated  
A system and method to control engine valve timing to improve air-fuel control in an engine with valves that may be deactivated. Valves that may be deactivated are controlled in a manner to improve...
7031828 Engine misfire detection system  
An engine misfire detection system includes a database of engine fingerprints, each fingerprint corresponding to a known misfire condition. A technician uses software to compare the fingerprints in...
7030742 Dual channel air/fuel ratio gauge  
There is provided an air/fuel ratio gauge for monitoring an engine exhaust mixture of an engine having a plurality of oxygen sensors. The gauge of the present invention comprises a gauge housing. A...
7027910 Individual cylinder controller for four-cylinder engine  
A generic technique for the detection of air-fuel ratio (or torque) imbalances in a 4-cylinder engine equipped with either a production oxygen sensor or a wide-range A/F sensor (or a crankshaft...
7021287 Closed-loop individual cylinder A/F ratio balancing  
The individual cylinder air to fuel ratio of an internal combustion engine varies due to the fact that the intake manifold cannot distribute airflow into the individual cylinders evenly. This...
7013862 Method for operating an internal combustion engine  
The invention concerns a method for operating an internal combustion engine ( 1, 18 ) having a plurality of combustion chambers ( 4 ), in the case of which the combustion chambers ( 4 ) are charged...
6988490 Engine fuel injection control system  
A system for controlling fuel injection in an engine. The engine includes an intake passage, an intake passage injector, a cylinder having a combustion chamber, and a cylinder injector for...
6988486 Air-fuel ratio control apparatus for multiple cylinder engine  
An air-fuel ratio control apparatus for a multiple cylinder engine, having catalytic converters and air-fuel ratio sensors in an exhaust manifold, comprises exhaust air-fuel ratio variation...
6947826 Method for compensating injection quality in each individual cylinder in internal combustion engines  
A method for cylinder-specific adjustment of the injection quantity in internal combustion engines is provided, as well as an internal combustion engine with which the method may be implemented....
6910471 Method for determining the fuel/air ratio in the individual cylinders of a multi-cylinder internal combustion engine  
A method is presented for determining the fuel/air ratio in the individual cylinders (single cylinder lambda) of an internal combustion engine having a plurality of cylinders, whose exhaust gases...
6901920 Engine control apparatus having cylinder-by-cylinder feedback control  
In an air-fuel ratio feedback control for an engine, a cylinder-by-cylinder variation value is calculated for each cylinder based on changes of intake pipe pressure detected by an intake pipe...
6845750 Method and device for controlling the drive unit of a vehicle  
A method and a device for controlling the drive unit of a vehicle. In this context, at least one correction variable of the drive unit is set as a function of a setpoint value for an output...
6830042 System for calculating air-fuel ratio of each cylinder of multicylinder internal combustion engine  
An ECU calculates the air-fuel ratio of each cylinder based on a sensor signal from an A/F sensor arranged at the collecting portion of the exhaust manifold and feedback controls the fuel injection...
6826471 Method for determining nitrogen oxide content in internal combustion engine exhaust gases containing oxygen  
An operating internal combustion engine with at least one cylinder ( 2 ), and a piston ( 12 ), which can move in an alternating manner therein, is used to compress a fuel mix in a combustion...
6792901 Control system of internal combustion engine  
A control system of an internal combustion engine is comprised of an operation angle adjustment mechanism which continuously varies an operation angle of intake valves of the engine, an air-fuel...
Matches 1 - 50 out of 118 1 2 3 >