System and method for automatically controlling vehicle speed to

Details System and method for automatically controlling vehicle speed to System and method for automatically controlling vehicle speed to

1988-10-25

1990-08-28

Black, Thomas G.

Boots, shoes, and leggings

180170, 180197, 36442603, B60K 3100

Patent

active

049530933

ABSTRACT:
A system and method for automatically controlling a vehicle speed to a desired cruise speed are disclosed in which when a vehicular running resistance is derived on the basis of an engine torque and change rate of the vehicle speed with time, the engine torque being derived on the basis of an engine revolutional speed and engine load, a predetermined factor determining the running resistance is derived on the basis of the running resistance. In addition, an absolute value of a difference of the predetermined factor from a previous predetermined factor derived one predetermined calculation period before is compared with a predetermined threshold value, a zero engine driving force command is outputted to an actuator of an engine driving force adjustng mechanism so that the engine driving force adjusting mechanism is actuated to zero the engine driving force to recover gripping forces of drive wheels when the absolute value of the difference exceeds the predetermined threshold value.

REFERENCES:
patent: 4615410 (1986-10-01), Hosaka
patent: 4736814 (1988-04-01), Yogo et al.
patent: 4763263 (1988-08-01), Leiber
patent: 4809183 (1989-02-01), Eckert
patent: 4811808 (1989-03-01), Matsumoto et al.
patent: 4814991 (1987-07-01), Tada et al.
patent: 4829438 (1989-05-01), Etoh
patent: 4833612 (1989-05-01), Okuno et al.

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