F - Mech Eng,Light,Heat,Weapons – 02 – D
Patent
F - Mech Eng,Light,Heat,Weapons
02
D
123/5
F02D 11/06 (2006.01) E02F 9/20 (2006.01) F02D 1/04 (2006.01) G05D 7/00 (2006.01) G05D 13/30 (2006.01)
Patent
CA 1148043
ENGINE SPEED CONTROL Abstract of the Disclosure An engine speed control for a variable speed engine wherein the engine can have a set speed to operate at a relatively low working speed or at an idle speed and which is adjustable to increase engine speed. The engine drives plural pumps and a control circuit is responsive to a certain flow rate from either of said pumps to increase the speed of the engine to provide for additional flow from the pumps. In a hydrostatic transmission as usable in the drive of a vehicle, there are a pair of fluid translating devices, in the form of a pump and a motor, with at least one of the devices being of variable displacement and having a displacement control responsive to a speed control signal. In such a system, the engine which powers the hydrostatic transmission is set at a desired speed of operation below maximum speed and is adjusted in response to the speed control signal for increase in said engine speed when the speed control signal exceeds a predetermined level. The control circuit also provides for destroking of the motor at maximum displacement of the pump when both are of variable displacement.
366393
George H. Riches And Associates
Sundstrand Corporation
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