Patent application number | Description | Published |
20080209900 | Exhaust Purification System for Internal Combustion Engine - In an exhaust purification system that purifies exhaust from a plurality of cylinder groups of an internal combustion engine, an exhaust passageway ( | 09-04-2008 |
20090099756 | FUEL INJECTION CONTROL DEVICE OF INTERNAL COMBUSTION ENGINE - An internal combustion engine including an in-cylinder injection injector and an intake port-injection injector. An ECU includes a fuel injection duration calculation portion that calculates a requested fuel injection duration and a fuel injection control portion that causes the in-cylinder injection injector to inject fuel during the compression stroke during the cold start of the engine, and that causes fuel to be injected also in a manner other than the fuel injection performed by the in-cylinder injection injector during the compression stroke if the requested fuel injection duration is longer than or equal to an interval time. Therefore, even if the requested fuel injection duration is longer than or equal to the interval time, the emissions can be reduced while a startability during a cold start of the internal combustion engine is secured. | 04-16-2009 |
20100012086 | CONTROL APPARATUS AND METHOD FOR INTERNAL COMBUSTION ENGINE - A control apparatus includes a detection unit that detects a stop request to an engine, a throttle closing control unit that, when the stop request is detected, adjusts an opening amount of a throttle valve to an engine-stop throttle valve opening amount smaller than a current opening amount an engine stop detection unit that detects a stop of the engine, an engine-stop exhaust valve control unit that adjusts an opening/closing characteristic of an exhaust valve of a cylinder that will be placed initially in an intake stroke when the engine is restarted so that, when the opening amount of the throttle valve is adjusted to the engine-stop throttle valve opening amount and a stop of the engine is detected, the exhaust valve has an engine-stop exhaust valve opening/closing characteristic by which a closing timing of the exhaust valve is more delayed than a current closing timing of the exhaust valve. | 01-21-2010 |
20100217501 | FUEL INJECTION CONTROL SYSTEM OF INTERNAL COMBUSTION ENGINE - A fuel injection control system of an internal combustion engine includes a required injection setting mechanism, a rapid rotational speed change detector, and an injection controller. The required injection setting mechanism calculates a required number of injections and required injection times with regard to a plurality of fuel injections, based on operating conditions of the engine. The rapid rotational speed change detector determines whether the amount of change of the engine speed is equal to or larger than a predetermined value. When it is determined that the amount of change of the engine speed is equal to or larger than the predetermined value, the injection controller controls a fuel injection valve so as to reduce or eliminate differences between the actual injection times and the required injection times. Thereby, even when the engine speed changes rapidly, deteriorations in the driveability and exhaust emissions are prevented. | 08-26-2010 |
Patent application number | Description | Published |
20090288646 | CONTROL APPARATUS AND CONTROL METHOD FOR INTERNAL COMBUSTION ENGINE - An internal combustion engine control apparatus includes: a purge control unit causing fuel evaporative emission to be introduced into an intake passage to attain a purge flow rate based on a pressure in the intake passage; a fuel cut return rich control unit setting a rich target air-fuel ratio when returning from fuel cut, and feedback-controlling a fuel supply rate on the basis of the target air-fuel ratio, purge flow rate and intake air flow rate to attain the target air-fuel ratio; a fuel increase upper limit setting unit setting an allowable upper limit for an increase in fuel supply rate in fuel cut return rich control; and an actual air-fuel ratio control unit controlling an actual air-fuel ratio to a richer side when the fuel supply rate in the fuel cut return rich control has reached the allowable upper limit and the actual air-fuel ratio is lean. | 11-26-2009 |
20120006307 | AIR-FUEL RATIO CONTROL APPARATUS OF A MULTI-CYLINDER INTERNAL COMBUSTION ENGINE - An air-fuel ratio control apparatus includes a catalytic converter disposed at a position downstream of an exhaust gas aggregated portion; a downstream air-fuel ratio sensor disposed in an exhaust passage at a position downstream of the catalytic converter; first feedback amount updating means for updating a first feedback amount to have an output value of the downstream air-fuel ratio sensor coincide with a target downstream-side air-fuel ratio based on the output value of the downstream air-fuel ratio sensor; and a learning means for updating a leaning value of the first feedback amount in such a manner that the leaning value brings in a steady-state component of the first feedback amount based on the first feedback amount. | 01-12-2012 |
20150047606 | CONTROLLER OF INTERNAL COMBUSTION ENGINE WITH SUPERCHARGER - A controller of an engine with a supercharger includes, for each of cylinders, fuel supply system and an ignition plug. The controller includes an electronic control unit that is configured to: (i) set a basic ignition timing depending on an operation state of the engine, (ii) detect, for each cycle, an abnormal combustion generation cylinder in which an abnormal combustion is generated in a supercharged region, (iii) execute a fuel cut to stop a fuel supply by the fuel supply system for the abnormal combustion generation cylinder, (iv) change an ignition timing of the abnormal combustion generation cylinder to expand a crank angle width between a compression top dead center and the basic ignition timing for several cycles after start of the fuel cut, and (v) execute an ignition cut that prohibits a spark from being generated by the ignition plug, further after elapse of the several cycles is executed. | 02-19-2015 |