CAR SPEED CONTROL DEVICE

Japanese Patent JP3613974

B2

PROBLEM TO BE SOLVED: To suppress generation of hunting when a delay of actual drive force is increased, by changing a waste time element of a control objective model to a value in accordance with a transient characteristic of a continuously variable transmission when target drive force is attained by speed change ratio of the continuously variable transmission with engine torque in a saturated condition.
SOLUTION: At vehicle running time, an actual car speed is obtained from an inverse of a measured car speed pulse width in a car speed controller A. Whether automatic car speed control (ASCD) is set or not is decided, in the case that an accelerating switch 2 is on during ASCD operation, an acceleration control mode is judged, a prescribed value is added to the present target car speed to accelerate a vehicle. Further, whether engine torque is in a saturated condition or not is detected, and at saturation condition time, disturbance applied to the vehicle by target drive force and the actual car speed is estimated, and a waste time element in an enciphered model used in an estimation means correcting the target drive force is changed. In this way, a margin degree of a car speed control system is increased, generation of hunting of a car speed or the like is suppressed.

JPH0532091	[Name of invention] Automatic transmission for vehicles
JP7095970	Vehicle control unit

Hiroyuki Ashizawa
Hideo Nakamura

JP12218198A

January 26, 2005

May 01, 1998

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Nissan Motor Co., Ltd

B60W10/04; B60K31/00; B60W10/06; B60W10/10; B60W10/101; B60W30/00; B60W30/14; B60W50/06; F02D29/00; F02D29/02; F16H9/00; F16H61/02; F16H63/50; (IPC1-7): B60K31/00; B60K41/00; B60K41/14; F02D29/00; F02D29/02; F16H9/00; F16H61/02

JP10059015A
JP9254679A
JP9112326A
JP9096355A
JP5116562A
JP5231528A

Fuyuki Nagai

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