Automatic engine fuel enrichment and ignition advance angle control system
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United States of America Patent
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Oct 1, 1991
Grant Date -
N/A
app pub date -
Jul 26, 1989
filing date -
Jul 26, 1989
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
An automatic fuel enrichment system for cranking and warm-up of an internal combustion engine in which a solenoid valve is responsive to control electronics for selectively feeding enrichment fuel to the engine air intake manifold. The valve control electronics receives a signal from the engine ignition system and controls a solenoid valve as a function of engine speed. Specifically, the control electronics energizes the solenoid valve when engine speed exceeds a preset minimum cranking threshold until the engine reaches a preset idle speed threshold, at which point enrichment is terminated. In the event that the engine begins to stall during warm-up and engine speed declines to a preset intermediate threshold, the enrichment valve is again energized until the engine reaches idle speed.
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