| Patent application number | Description | Published |
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| 20090031989 | IGNITION TIMING CONTROL APPARATUS AND IGNITION TIMING CONTROL METHOD FOR INTERNAL COMBUSTION ENGINE - In an ignition timing control apparatus for an engine, a KCS learning value learned when the engine is in a given operating state is used in an ignition timing control executed when the engine is in the other operating state. An estimated knocking occurrence ignition timing is set based on a most retarded ignition timing using the KCS learning value. A final ignition timing is set by changing a KCS feedback correction value based on whether knocking occurs when ignition is performed at the estimated knocking occurrence ignition timing. When a point indicating the engine operating state moves into a region where it is difficult to set the estimated knocking occurrence ignition timing, the KCS feedback correction value is changed to retard the final ignition timing, and the final ignition timing is set using the KCS learning value and the changed KCS feedback correction value. | 02-05-2009 |
| 20100211286 | DEVICE FOR LIMITING OUTPUT OF INTERNAL COMBUSTION ENGINE WHEN THE ENGINE HAS ABNORMALITY - An output restriction device for restricting engine output when a drive power output system for an internal combustion engine has an abnormality is provided. The output restriction device includes an abnormality detection unit, and initial restriction unit, and a secondary restriction unit. The abnormality restriction unit detects an abnormality in the drive power output system. The initial restriction unit restricts a tolerable range of the engine output to a first restriction region when the abnormality detection unit detects an abnormality in the drive power output system. A secondary restriction unit shifts the tolerable range of the engine output to a second restriction region, which has an upper limit lower than that of the first restriction region, in accordance with an operation history of the engine after the initial restriction unit restricts the tolerable range of the engine output to the first restriction region. | 08-19-2010 |
| 20100305833 | FUEL INJECTION CONTROL APPARATUS OF INTERNAL COMBUSTION ENGINE - In one embodiment, a determination is made of whether or not in a condition in which a compressed gas temperature will reach a fuel self-ignition temperature by only a compression operation in the compression stroke, and in a case where the compressed gas temperature will reach the fuel self-ignition temperature, pilot injection is judged to be unnecessary, so this pilot injection is prohibited. | 12-02-2010 |
| 20110005491 | FUEL INJECTION CONTROL APPARATUS OF INTERNAL COMBUSTION ENGINE - In one embodiment, a total pilot injection amount is calculated from the difference between a compressed gas temperature in a cylinder and a fuel self-ignition temperature. As pilot injection, a plurality of instances of divided pilot injection are performed, and by setting the injection amount per one instance of divided pilot injection to an injector minimum limit injection amount, each divided pilot injection amount is suppressed, and the penetration of fuel is suppressed to a low level so that attachment of fuel to a wall face is avoided, and also, fuel is caused to accumulate in the center portion of the cylinder. | 01-13-2011 |
| 20110056459 | FUEL INJECTION CONTROL APPARATUS FOR INTERNAL COMBUSTION ENGINE - A systematic fuel injection control technique for compression self-igniting internal combustion engines capable of executing an auxiliary injection prior to a primary injection is provided, with which it is possible to optimize an injection mode for the primary injection and the auxiliary injection. In a common rail diesel engine capable of executing at least a main injection and a pre-injection as an operation of fuel injection from an injector, the pre-injection is executed by being split into a first pre-injection and a second pre-injection. The injection timing and the injection amount of each fuel injection is controlled such that some of the fuel injected in the first pre-injection combusts by self-ignition, and the remainder of the fuel does not combust until fuel is injected in the main injection, but combusts together with the fuel injected in the main injection. Also, the injection timing of each fuel injection is controlled such that the fuel injected in the first pre-injection and flowing along a swirl flow in the cylinder overlaps the fuel injected in the subsequent main injection. | 03-10-2011 |
| 20110060514 | FUEL INJECTION CONTROL APPARATUS OF INTERNAL COMBUSTION ENGINE - A fuel injection control apparatus of an internal combustion engine of the present invention performs control for a common rail diesel engine so that at a timing when a piston reaches compression top dead center, the rate of heat production due to the combustion of fuel injected in pre-injection is substantially maximal, and furthermore so that the combustion of fuel injected in main injection is started in the vicinity of this timing. As a result, the combustion of fuel injected in main injection is started by fully utilizing the heat production amount due to the pre-injection. Also, this avoids the production of reverse torque, as well as ensures maximizing the amount of torque produced by the combustion of fuel injected in main injection. | 03-10-2011 |
| 20110180039 | FUEL INJECTION CONTROL APPARATUS FOR INTERNAL COMBUSTION ENGINE - In a common rail diesel engine, main injection is executed as injection divided into first divided main injection and second divided main injection. In the first divided main injection, fuel injection is stopped before a fuel evaporation speed in a combustion field becomes greater than an oxygen supply speed. After fuel injection is temporarily stopped, the combustion field of fuel that was injected in the first divided main injection flows in a circumferential direction within a combustion chamber according to a swirl flow, and the second divided main injection is executed when a region where the fuel evaporation speed is less than the oxygen supply speed, this being a region between combustion fields, has moved to a position facing an injection nozzle. | 07-28-2011 |
