Control apparatus and method of controlling internal combustion engine mounted on vehicle
AssigneeToyota Jidosha Kabushiki Kaisha
InventorsTakashi Tsunooka, Yoshiyuki Shogenji
Life of this patent
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Abstract
When an automobile is traveling on a road surface with a low friction coefficient upon a shift of an engine to idle operation in the process of stopping the automobile from traveling, a target engine speed of the engine is reduced by a value equivalent to a reduction in a drive request value for any auxiliary at a time point corresponding to start of reduction of the drive request value.
Claims9
A control apparatus for an internal combustion engine mounted on a vehicle that executes an engine idle speed control for adjusting the engine speed to a target engine speed set in accordance with a magnitude of a drive request value for an auxiliary driven by the internal combustion engine when a vehicle speed is equal to or below a predetermined speed to idle the internal combustion engine, when stopping the vehicle from traveling, reduces the drive request value for the auxiliary when executing the engine idle speed control, and reduces the target engine speed by a value equivalent to a reduction in the drive request value after lapse of a prescribed delay time from a time point corresponding to start of reduction of the drive request value, the control apparatus comprising:
- a detection device that determines whether the vehicle is traveling on a road surface with low friction coefficient;
- and
- an engine speed reduction device that reduces the target engine speed by the value equivalent to the reduction in the drive request value before lapse of the delay time if it is determined that the vehicle is traveling on a road surface with low friction coefficient.
A control method for an internal combustion engine mounted on a vehicle, wherein an engine idle speed control is executed to adjust the engine speed to a target engine speed set in accordance with a magnitude of a drive request value for an auxiliary driven by the internal combustion engine if a vehicle speed is equal to or below predetermined speed to idle the internal combustion engine, when stopping the vehicle from traveling, the drive request value for the auxiliary is reduced when executing the engine idle speed control, and the target engine speed is reduced by a value equivalent to a reduction in the drive request value after lapse of a prescribed delay time from a time point corresponding to start of reduction of the drive request value, the control method comprising:
- determining whether the vehicle is traveling on a road surface with low friction coefficient;
- and
- reducing the target engine speed by the value equivalent to the reduction in the drive request value before lapse of the delay time if it is determined that the vehicle is traveling on a road surface with low friction coefficient.
Dependencies are inferred from the claim text.