Control equipment for a vehicle and control method thereof
AssigneeHitachi, Ltd.
InventorsMitsuo Kayano, Toshimichi Minowa, Hiroshi Sakamoto
Life of this patent
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Abstract
A control device for a vehicle which has a function to reduce the change-speed shock when changing the speed by controlling the transmission of the vehicle. The control device performs the switching between a manual change-speed mode in which the vehicle speed can be changed based on a change-speed command generated by manual operation and an automatic change-speed mode in which a transmission gear ratio can be controlled based on the predetermined change-speed characteristic. Thereby the reduction amount of the change-speed shock can be changed between the manual change-speed mode and the automatic change-speed mode.
Claims5
A control system for an automotive vehicle comprising:
- a gear type power transmission comprising
- a start clutch transmitting an output torque of an engine to an input shaft;
- a plurality of gears and a plurality of mating clutches for transmitting said engine output torque from said input shaft to an output shaft;
- a shifting clutch for transmitting said engine output torque from said input shaft and said output shaft;
- and
- a motor generator provided on said input shaft;
- said plurality of gears and said plurality of mating clutches being selectively coupled for establishing a power transmission path from said input shaft to said output shaft,
- said shifting clutch and said motor generator being controlled upon changing of said power transmission path from a first coupling to a second coupling, for reducing a shifting shock,
- said power transmission being switchable between an automatic shifting mode in which transmission speed ratio is automatically selected based on a predetermined set of shifting characteristics and a manual shifting mode in which transmission speed ratio is manually selected by a manual shifting operation, and
- said shifting clutch being responsive to said power transmission switching between said automatic shifting mode and said manual shifting mode, and
- wherein a magnitude of shifting-shock reduction by said shifting clutch is different between said automatic shifting mode and said manual shifting mode.
Dependencies are inferred from the claim text.