Control system for controlling opening of throttle valve

Details Control system for controlling opening of throttle valve Control system for controlling opening of throttle valve

1975-02-28

1976-12-28

Burns, Wendell E.

Internal-combustion engines

Intake manifold

Manifold tuning, balancing or pressure regulating means

180108, F02D 1108

Patent

active

039995240

ABSTRACT:
A control system for controlling the opening of a throttle valve of a vehicle comprises a throttle valve actuating mechanism and a diaphragm apparatus including a diaphragm member which divides the casing of the diaphragm apparatus into two chambers, the first chamber being communicated through an orifice and air chamber with an intake manifold leading to an engine while the second chamber being communicated directly with the intake manifold.
When a vehicle is decelerated, the vacuum in the intake manifold is increased with the result that the vacuum in the second chamber is increased while the vacuum in the first chamber does not increase, because of the presence of the orifice and air chamber so that the vacuum in the second chamber will become higher than that in the first chamber, pulling the diaphragm member toward the second chamber, which drives the throttle valve actuating mechanism to actuate the throttle valve to open to feed more air fuel mixture, thus preventing misfire. It follows that the discharge of unburned hydrocarbons will be reduced.

REFERENCES:
patent: 2988074 (1961-06-01), Lobdell et al.
patent: 3027884 (1962-04-01), Bale, Jr. et al.
patent: 3133610 (1964-05-01), Sheppard
patent: 3266473 (1966-08-01), Rhodes
patent: 3446193 (1969-05-01), Boller
patent: 3788288 (1974-01-01), Harrison et al.
patent: 3795237 (1974-03-01), Denton

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