Shift control system and shift control method
AssigneeToyota Jidosha Kabushiki Kaisha
InventorsSumiko Amamiya, Tatsuya Ozeki, Shigeru Kamio, Yasuhiro Nakai, Kazuo Kawaguchi
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Abstract
A P-ECU determines whether or not energization to an actuator is shut off when a shift-range switch instruction is unissued. If energization to the actuator is shut off, the P-ECU obtains a current rotational position of the actuator according to a count value obtained by an encoder. If a difference between a target rotational position and the current rotational position exceeds a predetermined amount, positional correction control is exercised.
Claims12
A shift control system switching a shift range by rotating an actuator according to a shift-range switch instruction, comprising:
- count means for obtaining a count value according to a rotational amount of said actuator;
- and
- position control means for rotating said actuator into a predetermined target range based on said count value,
- said count means including means for obtaining said count value even in a period in which energization to said actuator is shut off, and
- said position control means including means for resuming energization to said actuator if a rotational position of said actuator is out of said target range in the period in which energization to said actuator is shut off.
A shift control system switching a shift range by rotating an actuator according to a shift-range switch instruction, comprising:
- a count unit for obtaining a count value according to a rotational amount of said actuator;
- and
- a position control unit for rotating said actuator into a predetermined target range based on said count value,
- said count unit obtaining said count value even in a period in which energization to said actuator is shut off, and
- said position control unit resuming energization to said actuator if a rotational position of said actuator is out of said target range in the period in which energization to said actuator is shut off.
A shift control method comprising the steps of
- driving an actuator to rotate a detent plate into a predetermined target range according to a shift-range switch instruction to switch a shift range;
- engaging a detent spring with said detent plate in said target range to fix the shift range at a predetermined shift range;
- and
- resuming, if a rotational position of said detent plate is out of the target range of said detent plate according to said shift-range switch instruction in a period in which said actuator is uncontrolled, control of said actuator.
Dependencies are inferred from the claim text.