Claims
- 1. 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. The shift control system according to claim 1, wherein
said shift means includes a detent plate rotated by said actuator and a detent spring engaging with a depression of said detent plate that is formed correspondingly to a shift range and thereby fixing a shift position, and said return control means includes means for rotating said actuator to a position which allows flexure or extension of said detent spring to be cancelled.
- 3. The shift control system according to claim 2, wherein
said return control means includes means for detecting an abnormality, when said actuator is rotated by the predetermined amount from the reference position, from the fact that said actuator is rotated by more than the predetermined amount.
- 4. The shift control system according to claim 1, wherein
said return control means includes means for detecting an abnormality, when said actuator is rotated by the predetermined amount from the reference position, from the fact that said actuator is rotated by more than the predetermined amount.
- 5. 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.
- 6. The shift control system according to claim 5, wherein
said shift means includes a detent plate rotated by said actuator and a detent spring engaging with a depression of said detent plate that is formed correspondingly to a shift range and thereby fixing a shift position, and said return control means includes means for rotating said actuator to a position which allows flexure or extension of said detent spring to be cancelled.
- 7. The shift control system according to claim 6, wherein
said position setting means includes means for detecting an abnormality, when said actuator is rotated by said rotation control means in setting said reference position, from the fact that said actuator is returned in the opposite direction by more than the predetermined amount.
- 8. The shift control system according to claim 7, wherein
said return control means includes means for detecting an abnormality, when said actuator is rotated by the predetermined amount from the reference position, from the fact that said actuator is rotated by more than the predetermined amount.
- 9. The shift control system according to claim 6, wherein
said return control means includes means for detecting an abnormality, when said actuator is rotated by the predetermined amount from the reference position, from the fact that said actuator is rotated by more than the predetermined amount.
- 10. The shift control system according to claim 5, wherein
said position setting means includes means for detecting an abnormality, when said actuator is rotated by said rotation control means in setting said reference position, from the fact that said actuator is returned in the opposite direction by more than the predetermined amount.
- 11. The shift control system according to claim 10, wherein
said return control means includes means for detecting an abnormality, when said actuator is rotated by the predetermined amount from the reference position, from the fact that said actuator is rotated by more than the predetermined amount.
- 12. The shift control system according to claim 5, wherein
said return control means includes means for detecting an abnormality, when said actuator is rotated by the predetermined amount from the reference position, from the fact that said actuator is rotated by more than the predetermined amount.
- 13. The shift control system according to any of claims 1-12, wherein
said return control means includes means for detecting an abnormality, when said actuator is rotated by the predetermined amount from the reference position under return control, from the fact that the return control is not finished even after a predetermined period of time.
- 14. A shift control method for switching a shift range via an actuator, comprising the steps of:
rotating by said actuator shift means for switching the shift range; stopping rotation of said actuator by restriction means for restricting rotation in a predetermined direction of said actuator in a predetermined shift range; detecting a reference position corresponding to the predetermined shift range based on a position where said stopping is effected; and rotating said actuator by a predetermined amount in the opposite direction.
- 15. 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; and a return control unit for rotating, 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, 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 component.
- 16. The shift control system according to claim 15, wherein
said shift component includes a detent plate rotated by said actuator and a detent spring engaging with a depression of said detent plate that is formed correspondingly to a shift range and thereby fixing a shift position, and said return control unit rotates said actuator to a position which allows flexure or extension of said detent spring to be cancelled.
- 17. The shift control system according to claim 16, wherein
said return control unit detects an abnormality, when said actuator is rotated by the predetermined amount from the reference position, from the fact that said actuator is rotated by more than the predetermined amount.
- 18. The shift control system according to claim 15, wherein
said return control unit detects an abnormality, when said actuator is rotated by the predetermined amount from the reference position, from the fact that said actuator is rotated by more than the predetermined amount.
- 19. 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.
- 20. The shift control system according to claim 19, wherein
said shift component includes a detent plate rotated by said actuator and a detent spring engaging with a depression of said detent plate that is formed correspondingly to a shift range and thereby fixing a shift position, and said return control unit rotates said actuator to a position which allows flexure or extension of said detent spring to be cancelled.
- 21. The shift control system according to claim 20, wherein
said position setting unit detects an abnormality, when said actuator is rotated by said rotation control unit in setting said reference position, from the fact that said actuator is returned in the opposite direction by more than the predetermined amount.
- 22. The shift control system according to claim 21, wherein
said return control unit detects an abnormality, when said actuator is rotated by the predetermined amount from the reference position, from the fact that said actuator is rotated by more than the predetermined amount.
- 23. The shift control system according to claim 20, wherein
said return control unit detects an abnormality, when said actuator is rotated by the predetermined amount from the reference position, from the fact that said actuator is rotated by more than the predetermined amount.
- 24. The shift control system according to claim 19, wherein
said position setting unit detects an abnormality, when said actuator is rotated by said rotation control unit in setting said reference position, from the fact that said actuator is returned in the opposite direction by more than the predetermined amount.
- 25. The shift control system according to claim 24, wherein
said return control unit detects an abnormality, when said actuator is rotated by the predetermined amount from the reference position, from the fact that said actuator is rotated by more than the predetermined amount.
- 26. The shift control system according to claim 19, wherein
said return control unit detects an abnormality, when said actuator is rotated by the predetermined amount from the reference position, from the fact that said actuator is rotated by more than the predetermined amount.
- 27. The shift control system according to any of claims 15-26, wherein
said return control unit detects an abnormality, when said actuator is rotated by the predetermined amount from the reference position under return control, from the fact that the return control is not finished even after a predetermined period of time.
- 28. A shift control method for switching a shift range via an actuator, comprising the steps of:
rotating by said actuator a shift component for switching the shift range; stopping rotation of said actuator by a restriction component for restricting rotation in a predetermined direction of said actuator in a predetermined shift range; detecting a reference position corresponding to the predetermined shift range based on a position where said stopping is effected; and rotating said actuator by a predetermined amount in the opposite direction.
Priority Claims (1)
Number |
Date |
Country |
Kind |
2003-105824 |
Apr 2003 |
JP |
|
Parent Case Info
[0001] This nonprovisional application is based on Japanese Patent Application No. 2003-105824 filed with the Japan Patent Office on Apr. 9, 2003, the entire contents of which are hereby incorporated by reference.