Engine idle control valve

Details Engine idle control valve Engine idle control valve

1990-08-16

1991-11-19

Nelli, R. A.

Internal-combustion engines

Engine speed regulator

Idle speed control

123585, 251 3003, F02M 300, F02B 2300, F16K 3112

Patent

active

050657186

ABSTRACT:
An engine control valve is disclosed which comprises a first bypass passage for introducing auxiliary air flow to an engine from an upstream side of an intake throttle valve disposed in an air intake pipe of the engine while bypassing the intake throttle valve; a second bypass passage having an inlet port in communication with an outlet port of the first bypass passage, for introducing the auxiliary air flow, introduced through the inlet port, to a downstream side of the intake throttle valve; a valve body for changing an opening area of at least one of the outlet port of the first bypass passage and the inlet port of the second bypass passage, thereby adjusting an amount of the auxiliary air flow to be introduced from the upstream side to the downstream side of the intake throttle valve; and a drive unit for driving the valve body in accordance with a drive signal outputted from the control unit. When a maximum drive signal is inputted into the drive unit, the opening area of at least one of the outlet port of the first bypass passage and the inlet port of the second bypass passage is throttled so that a predetermined amount of the auxiliary air flow smaller than a maximum amount of the auxiliary air flow may be introduced into the downstream side of the intake throttle valve.

REFERENCES:
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patent: 4909213 (1990-03-01), Mezger et al.
patent: 4940031 (1990-07-01), Mann
patent: 4962737 (1990-10-01), Brand et al.
patent: 4966112 (1990-10-01), Shimomura et al.

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