Constant speed holding device

Details Constant speed holding device Constant speed holding device

1988-06-30

1990-09-11

Black, Thomas G.

Boots, shoes, and leggings

180179, 123352, B60K 3104

Patent

active

049567780

ABSTRACT:
A constant speed holding device for a vehicle includes a running speed detector, an aimed speed setting unit, a speed deviation calculating unit for calculating a speed deviation, an acceleration calculating unit, a first pulse width calculating unit responsive to a speed deviation signal from the speed deviation calculating unit and an acceleration signal from the acceleration calculating unit for calculating a pulse width of a first pulse signal having a predetermined period, an acceleration memory unit for storing a value of the acceleration signal in the past, an aimed acceleration generating unit responsive to an output of said acceleration memory for generating a desired aimed acceleration, an acceleration deviation calculating unit responsive to the aimed acceleration signal and the acceleration signal for calculating an acceleration deviation, a second pulse width calculating unit responsive to the acceleration deviation signal for calculating a pulse width of a second pulse signal having a predetermined period, an output pulse selection unit for selecting either the first or the second pulse signals, whichever is suitable, and an actuator responsive to a selected output pulse signal for on-off controlling a throttle valve of an engine of the vehicle based on the pulse width thereof.

REFERENCES:
patent: 4451888 (1984-05-01), Kuno et al.
patent: 4467428 (1984-08-01), Caldwell
patent: 4591986 (1986-05-01), Nakajima et al.
patent: 4597049 (1986-06-01), Murakami
patent: 4598370 (1986-07-01), Nakajima et al.
patent: 4725969 (1988-02-01), Onogi et al.

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