Constant speed running apparatus

Details Constant speed running apparatus Constant speed running apparatus

1986-12-04

1988-07-05

Love, John J.

Motor vehicles

With means responsive to speed of vehicle for maintaining...

Including fluid pressure actuated servomechanism

123360, 36443107, B60K 3100

Patent

active

047548312

ABSTRACT:
A constant speed running apparatus has a surge tank for storing a vacuum for driving a vacuum actuator, a vacuum switch for judging the amount of vacuum stored in the surge tank, and a vacuum pump activated when the amount of vacuum stored in the tank decreases so as to supply the vacuum to the tank. When a switch for starting a constant speed running is actuated, the pump is activated for a predetermined period of time to replenish the vacuum before the vacuum switch is activated. Accordingly, it is possible to maintain the internal pressure in the surge tank at a sufficiently high level when a constant-speed running control is started, and consequently improve the response of the actuator.

REFERENCES:
patent: 3570622 (1971-03-01), Wisner
patent: 3999622 (1976-12-01), Reed
patent: 4335799 (1982-06-01), Shields
patent: 4457392 (1984-07-01), Caldwell et al.

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