Device for controlling negative pressure in suction pipe of inte

Details Device for controlling negative pressure in suction pipe of inte Device for controlling negative pressure in suction pipe of inte

1979-10-29

1982-05-11

Feinberg, Craig R.

Internal-combustion engines

Engine speed regulator

Responsive to deceleration mode

123389, 261DIG19, F02D 3300

Patent

active

043287743

ABSTRACT:
A suction pipe is provided to suck and introduce air from its one end and is connected at its other end to an internal combustion engine. The suction pipe is provided at its one end with a venturi portion and a throttle valve. A first negative pressure detector is provided to detect the negative pressure at the portion of the suction pipe remote from the internal combustion engine, so as to sense a comparatively gentle pressure rise in the suction pipe. A control valve is provided to be opened and closed in accordance with the output from the first negative pressure detector, thereby to control the flow rate of air supplied into the suction pipe. A second negative pressure detector is provided to detect the negative pressure at a portion of the suction pipe remote from the internal combustion engine, so as to sense an abrupt increase of the negative pressure in the suction pipe. This second negative pressure detector is disposed between the first valve and the first negative pressure detector and adapted to produce an output in accordance with which the first valve is controlled.

REFERENCES:
patent: 2211336 (1940-08-01), Linder
patent: 3852391 (1974-12-01), Hisatomi et al.
patent: 3866583 (1975-01-01), Pundt et al.
patent: 4182291 (1980-01-01), Ito

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