Idle speed control apparatus for an internal combustion engine

Details Idle speed control apparatus for an internal combustion engine Idle speed control apparatus for an internal combustion engine

1996-05-16

1997-05-13

Dolinar, Andrew M.

Internal-combustion engines

Combustion chamber means having fuel injection only

Having a particular relationship between injection and...

12333912, F02D 4116

Patent

active

056282907

ABSTRACT:
An idle speed control apparatus includes an electronic control unit connected to sensors and switches for detecting the on-off states of an air conditioner and other devices, throttle opening, engine speed, etc. The electronic control unit selectively drives fuel injection valves for adjusting the injection quantity, air bypass valve for adjusting the suction rate, and/or EGR valve for adjusting the exhaust gas recirculation rate in accordance with an engine load detected by the sensors and switches, thereby selectively executing air-fuel ratio adjustment, suction rate adjustment, and/or exhaust gas recirculation rate adjustment as required, giving priority to the air-fuel ratio adjustment and suction rate adjustment in the order named. Thus, idle speed control to cope with engine load fluctuations can be carried out with stability.

REFERENCES:
patent: 4398514 (1983-08-01), Nakamura
patent: 4593663 (1986-06-01), Atago et al.
patent: 4721082 (1988-01-01), Hibino et al.

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