US 2004/0200301 A1 · Shift control system and shift control method

Abstract

A shift control system rotates an actuator to allow a wall of a detent plate and a roller of a detent spring to contact each other and then detects the position of contact so as to detect the position of the wall of the detent plate. After the wall position is determined, the actuator is driven in the direction opposite to the wall until the actuator reaches a position located before the wall position and distant therefrom by a predetermined amount, in order to cancel flexure or extension of the detent spring that is caused when the detent spring is pushed against the wall of the detent plate. Accordingly, such a situation where the shift position is moved by the recovery force of the detent spring can be avoided.

Claims28

Dependent claims

A shift control system switching a shift range via an actuator, comprising:

shift means driven by said actuator for switching the shift range;
restriction means for restricting rotation in a predetermined direction of said actuator in a predetermined shift range;
rotation control means for rotating said actuator;
and
return control means for rotating, when said actuator is rotated by said rotation control means in the direction in which rotation of said actuator is restricted by said restriction means, said actuator by a predetermined amount from a reference position of said actuator corresponding to a predetermined shift range, in an opposite direction which is opposite to the direction in which restriction is effected by said restriction means.

2 more elements

A shift control system switching a shift range via an actuator, comprising:

shift means driven by said actuator for switching the shift range;
restriction means for restricting rotation in a predetermined direction of said actuator in a predetermined shift range;
rotation control means for rotating said actuator;
count means for obtaining a count value according to a rotational amount of said actuator;
position setting means for setting, when said actuator is rotated by said rotation control means in the direction in which rotation of said actuator is restricted by said restriction means, a reference position of said actuator corresponding to the predetermined shift range based on a state of said count value obtained by said count means;
and
return control means for rotating, after said reference position is set by said position setting means, said actuator by a predetermined amount from the reference position, in an opposite direction which is opposite to the direction in which rotation of said actuator is restricted by said restriction means.

4 more elements

A shift control system switching a shift range via an actuator, comprising:

a shift component driven by said actuator for switching the shift range;
a restriction component for restricting rotation in a predetermined direction of said actuator in a predetermined shift range;
a rotation control unit for rotating said actuator;
a count unit for obtaining a count value according to a rotational amount of said actuator;
a position setting unit for setting, when said actuator is rotated by said rotation control unit in the direction in which rotation of said actuator is restricted by said restriction component, a reference position of said actuator corresponding to the predetermined shift range based on a state of said count value obtained by said count unit;
and
a return control unit for rotating, after said reference position is set by said position setting unit, said actuator by a predetermined amount from the reference position, in an opposite direction which is opposite to the direction in which rotation of said actuator is restricted by said restriction component.

4 more elements

Dependencies are inferred from the claim text.

Shift control system and shift control method

Life of this patent

Shift control system and shift control method

Life of this patent

Abstract

Claims28