Valve timing control apparatus and method of internal combustion engine
AssigneeToyota Jidosha Kabushiki Kaisha
InventorsYoshihito Moriya, Hiroyuki Kawase, Hideo Nagaosa
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Abstract
A valve timing control apparatus of an internal combustion engine that includes a biasing device that applies bias force to a camshaft of intake or exhaust valves so as to bring the valve timing of the engine into a predetermined state when the valve timing is in a predetermined range, for example, when the valve timing is on the retard side of the engine start valve timing with which the engine is started is controlled by a controller that controls the valve timing in view of the bias force of the biasing device.
Claims44
A valve timing control apparatus of an internal combustion engine that includes a biasing device that exerts a bias force so as to bring valve timing of the engine into a predetermined state when the valve timing is in a predetermined range, said valve timing control apparatus comprising:
- a controller that controls the valve timing while taking into account the bias force of the biasing device;
- wherein:
- the predetermined state is between a most retarded state and a most advanced state, and the biasing device exerts the bias force so as to bring the valve timing of the engine into the predetermined state when the valve timing is on a retard side of the predetermined state;
- and
- the controller controls the valve timing while taking into account the bias force of the biasing device at least when the valve timing is on the retard side of the predetermined state.
A valve timing control apparatus of an internal combustion engine that includes a biasing device that exerts a bias force so as to bring valve timing of the engine into a predetermined state when the valve timing is in a predetermined range, said valve timing control apparatus comprising:
- a controller that controls the valve timing while taking into account the bias force of the biasing device, wherein the controller:
- sets a target value of the valve timing in accordance with an operating state of the engine;
- and
- calculates a control amount used for controlling the valve timing so that the valve timing approaches the target value, said controller calculating the control amount while taking into account the bias force of the biasing device.
A method of performing valve timing control for an internal combustion engine that includes a biasing device that exerts a bias force so as to bring valve timing of the engine into a predetermined state when the valve timing is in a predetermined range, the method comprising the step of:
- controlling the valve timing while taking into account the bias force of the biasing device;
- wherein:
- the predetermined state is between a most retarded state and a most advanced state, and the biasing device exerts the bias force so as to bring the valve timing of the engine into the predetermined state when the valve timing is on a retard side of the predetermined state;
- and
- the controlling step includes controlling the valve timing while taking into account the bias force of the biasing device at least when the valve timing is on the retard side of the predetermined state.
A method of performing valve timing control for an internal combustion engine that includes a biasing device that exerts a bias force so as to bring valve timing of the engine into a predetermined state when the valve timing is in a predetermined range, the method comprising the step of:
- controlling the valve timing while taking into account the bias force of the biasing device, wherein the controlling step includes the sub-steps of:
- setting a target value of the valve timing in accordance with an operating state of the engine;
- and
- calculating a control amount used for controlling the valve timing so that the valve timing approaches the target value, said calculating of the control amount being performed while taking into account the bias force of the biasing device.
Dependencies are inferred from the claim text.