Idle speed control system

Details Idle speed control system Idle speed control system

1992-10-28

1993-04-20

Nelli, Raymond A.

Internal-combustion engines

Engine speed regulator

Idle speed control

123520, F02M 300

Patent

active

052033007

ABSTRACT:
A control system (10) controls both engine idle speed and purge flow through a fuel vapor recovery system (86) into an air/fuel intake of the engine. A bypass throttle valve (72) connected in parallel with a primary engine throttle (62) is controlled by a feedback variable (ISFV) related to a difference between actual idle speed and desired idle speed. Purge flow (pdc) is reduced when the bypass throttle position falls below a dead band provided stoichiometric air/fuel control is maintained.

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patent: 5083541 (1992-01-01), Chen
patent: 5090388 (1992-02-01), Hamburg et al.

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