Method of preventing spark plug fouling

Details Method of preventing spark plug fouling Method of preventing spark plug fouling

1990-07-06

1992-08-25

Lall, Parshotam S.

Boots, shoes, and leggings

123491, 123179G, 123179L, 12317916, 12317917, 12317918, F02D 4130

Patent

active

051424797

ABSTRACT:
The fuel control routine of an engine control module sets a cold enrichment schedule used for engine starting when the engine is cold. The enrichment value is dependent on coolant temperature. To prevent plug fouling in a new vehicle subject to short engine run times, the enrichment value is reduced if the mileage is below 50 miles, the coolant temperature is within set limits and the previous engine run time was shorter than a set period.

REFERENCES:
patent: 4245317 (1981-01-01), Marchak
patent: 4558673 (1985-12-01), Mackie
patent: 4582036 (1986-04-01), Kiuchi et al.
patent: 4739741 (1988-04-01), Iwata et al.
patent: 4838230 (1989-06-01), Matsuoka

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