Method of controlling a throttle valve and a throttle valve open

Details Method of controlling a throttle valve and a throttle valve open Method of controlling a throttle valve and a throttle valve open

1977-05-31

1979-03-20

Myhre, Charles J.

Internal-combustion engines

Poppet valve operating mechanism

Hydraulic system

123103E, 123124A, 261DIG19, F02D 3302, F02D 1108, F02M 2304

Patent

active

041448529

ABSTRACT:
Disclosed is a throttle valve opening control device for use in an internal combustion engine. When the throttle valve is rapidly closed after completion of the warm-up of the engine, the throttle valve is temporarily held during a first length of time at a predetermined opening degree which is greater than an idling opening degree and, then, the throttle valve is gradually returned to its idling position. Contrary to this, when the throttle valve is rapidly closed before completion of the warm-up of the engine, the throttle valve is temporarily held at the predetermined opening degree during a second length of time, which is longer than said first length of time and, then, the throttle valve is gradually returned to its idling position.

REFERENCES:
patent: 2990825 (1961-07-01), Fuller et al.
patent: 3721222 (1973-03-01), Shioya et al.
patent: 4060063 (1977-11-01), Hirasawa

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