Independent cylinder idle air control system

Details Independent cylinder idle air control system Independent cylinder idle air control system

1996-06-13

1997-07-22

Argenbright, Tony M.

Internal-combustion engines

Engine speed regulator

Idle speed control

12333927, F02D 4116

Patent

active

056495129

ABSTRACT:
An air intake system for an internal combustion engine having a load controlled port throttle system. Specifically the air intake system includes an idle speed control assembly (30), with a metered air line (28) supplying air to a slide metering valve (32). Idle air lines (34) lead from the slide metering valve (32) to the intake ports (16) downstream of the throttle valves (20). The slide metering valve (32) includes a slider plate (50), which can be moved by a solenoid (42) to maintain varying degrees of alignment with outlet passages (48) to the idle air lines (34). In this way, precise amounts of idle air are metered to the intake ports (16) with equal cylinder-to-cylinder air flow and without substantial cross-communication of air between cylinders. A vacuum assembly may also tap into the idle air lines (34) to provide a stable source of vacuum for other engine components.

REFERENCES:
patent: 4438745 (1984-03-01), Wantanabe
patent: 4561471 (1985-12-01), Diaz
patent: 4771750 (1988-09-01), Breitkreutz et al.
patent: 5063899 (1991-11-01), Hitomi et al.
patent: 5146888 (1992-09-01), Sawamoto
The Effects of Load Control with Port Throttling at Idle-Measurements and Analyses, Newman et al, 890679, Society of Automotive Engineers, Inc., copyright 1989.

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