Method of and apparatus for cruise control

Details Method of and apparatus for cruise control Method of and apparatus for cruise control

1994-02-16

1996-02-27

Lobo, Ian J.

Communications: directive radio wave systems and devices (e.g.,

Return signal controls external device

Radar mounted on and controls land vehicle

36442604, 36443107, 180167, 180170, B60K 3100

Patent

active

054952514

ABSTRACT:
A vehicle cruise controller is provided which monitors the range to and relative speed of a target vehicle ahead of the vehicle being controlled by the cruise controller. A radar provides measurements of range and relative speed. The range measurement is compared by a subtracter with a desired range which is a function of vehicle speed, so as to form a distance error. The relative speed signal represents a speed error. An acceleration demand is formed as a function, for example, a weighted sum, of the distance and speed errors. More significance is given to the distance error when the target is relatively close. This is achieved by varying the gain of a multiplier. The acceleration demand may be supplied to vehicle brake and drive systems, but preferably the acceleration demand is compared with actual vehicle acceleration to provide the advantages of closed loop control.

REFERENCES:
patent: 4519469 (1985-05-01), Hayashi et al.
patent: 4621705 (1986-11-01), Etoh
patent: 5014200 (1991-05-01), Chundrlik et al.
patent: 5166881 (1992-11-01), Akasu
patent: 5173859 (1992-12-01), Deering

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