F - Mech Eng,Light,Heat,Weapons – 02 – D
Patent
F - Mech Eng,Light,Heat,Weapons
02
D
123/4
F02D 29/02 (2006.01) B60K 31/08 (2006.01)
Patent
CA 1044963
DIFFERENTIAL PRESSURE POWER ROAD SPEED CONTROL SYSTEM Abstract of the Disclosure A vehicle road speed control system in which the engine intake manifold pressure and the engine exhaust manifold pressure are utilized on opposite sides of a servomotor power wall to control the engine throttle and maintain a desired constant vehicle speed. The intake manifold pressure is normally sub- atmospheric and the exhaust manifold pressure is normally super- atmospheric. Within the usual operating range of vehicle engine loads, the pressure difference between the two pressures remains substantially constant and provides a more uniform pressure dif- ferential than that provided in systems in which atmospheric pressure is the higher of the two pressures. The intake manifold pressure has a control valve in the conduit leading to the servomotor which varies the value of the pressure difference delivered to the servomotor in accordance with a control signal generated by a comparison of desired vehicle speed and actual vehicle speed.
259116
Carol John A. (jr.)
Paxton Wayne E.
Riddel John W.
LandOfFree
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