Valve timing control apparatus for internal combustion engine and control method thereof
AssigneeHitachi, Ltd.
InventorsRyo Miyakoshi, Kenichi Machida, Masahiko Watanabe, Yoshiyuki Kobayashi
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Abstract
A valve timing control apparatus for an internal combustion engine which comprises a variable valve timing mechanism which varies an opening-and-closing timing of an intake valve and/or an exhaust valve of an engine, and in which the opening-and-closing timing at a time of starting the engine is set to a starting time timing which is at a further advance side than a maximum retard timing which is retarded at the maximum, said apparatus characterized in that, at a time of stopping the engine, the variable valve timing mechanism is controlled such that the opening-and-closing timing is made to be the starting time timing.
Claims21
A valve timing control apparatus for an internal combustion engine comprising:
- a variable valve timing mechanism which varies an opening-and-closing timing of an intake valve and/or an exhaust valve of an engine;
- and
- a control unit which sets a target opening-and-closing timing, and which controls said variable valve timing mechanism such that said opening-and-closing timing is set to said target opening-and-closing timing, wherein
- said control unit, at a time of starting the engine, sets a starting time timing which is at a further advance side than a maximum retard timing in which said opening-and-closing timing is retarded at the maximum to said target opening-and-closing timing, and at a time of stopping the engine, sets said starting time timing to said target opening-and-closing timing.
A valve timing control apparatus for an internal combustion engine comprising:
- a variable valve timing mechanism which varies an opening-and-closing timing of an intake valve and/or an exhaust valve of an engine;
- a temperature sensor which detects an engine temperature;
- and
- a control unit which sets a target opening-and-closing timing, and which controls said variable valve timing mechanism such that said opening-and-closing timing is made to be said target opening-and-closing timing, wherein
- said control unit, at a time of starting the engine, sets a starting time timing which is at a further advance side than a maximum retard timing in which said opening-and-closing timing is retarded at the maximum to said target opening-and-closing timing, and sets a starting time manipulated variable to be outputted to said variable valve timing mechanism on the basis of a manipulated variable set in advance in accordance with an engine temperature.
A valve timing control apparatus for an internal combustion engine comprising:
- a variable valve timing mechanism which varies an opening-and-closing timing of an intake valve and/or an exhaust valve of an engine;
- target opening-and-closing timing setting means, at a time of starting an engine, for setting a starting time timing which is at a further advance side than a maximum retard timing in which said opening-and-closing timing is retarded at the maximum to a target opening-and-closing timing, and at a time of stopping an engine as well, for setting said starting time timing to the target opening-and-closing timing;
- and
- driving means for driving said variable valve timing mechanism such that said opening-and-closing timing is made to be a set target opening-and-closing timing.
A valve timing control method for an internal combustion engine comprising the steps of:
- at a time of starting the engine, controlling an opening-and-closing timing of an intake valve and/or an exhaust valve of an engine to be a starting time timing which is at a further advance side than a maximum retard timing which is retarded at the maximum;
- and
- at the time of stopping the engine as well, controlling said opening-and-closing timing to be the starting time timing.
A valve timing control method for an internal combustion engine, wherein
- at a time of starting an engine, a starting time manipulated variable is set on the basis of a manipulated variable set in advance in accordance with an engine temperature, the set starting time manipulated variable is outputted to a variable valve timing mechanism which varies an opening-and-closing timing of an intake valve or an exhaust valve of the engine, and said opening-and-closing timing is controlled to be a starting time timing which is at a further advance side than a maximum retard timing which is retarded at the maximum.
Dependencies are inferred from the claim text.