Diesel throttle valve control system

Details Diesel throttle valve control system Diesel throttle valve control system

1980-07-08

1982-10-19

Cuchlinski, Jr., William A.

Internal-combustion engines

Engine speed regulator

Idle speed control

123341, 123389, F02D 900

Patent

active

043544657

ABSTRACT:
An intake air throttle valve control system for a diesel engine which greatly reduces vibration and noise and rough engine running at idling speeds. A throttle valve is provided in an intake passage in series with the intake air manifold of the engine with the valve operated by a negative pressure responsive actuator. The negative pressure responsive actuator is coupled to a source of negative pressure through a series-connected arrangement of a water temperature sensing valve, a vacuum cut-off valve and a negative pressure control valve. The water temperature sensing valve operates to connect or disconnect the source of negative pressure to the actuator in response to the temperature of the engine coolant. The vacuum cut-off valve vents the connections to the actuator to the atmosphere in response to an engine operating parameter such as the exhaust manifold pressure, the pressure in an oil line of the engine, or an output voltage of a generator which varies in response to the engine speed. The negative pressure control valve introduces atmospheric pressure into the system in proportion to the magnitude of negative pressure in the intake manifold downstream of the throttle valve.

REFERENCES:
patent: 3456632 (1969-07-01), Rhodes
patent: 3977372 (1976-08-01), Fernandez

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