Process for determining the optimal richness of a fuel-air mixtu

Details Process for determining the optimal richness of a fuel-air mixtu Process for determining the optimal richness of a fuel-air mixtu

1998-03-27

1999-11-30

Solis, Erick R.

Internal-combustion engines

Engine speed regulator

Charge proportion varying

123478, 123436, F02M 700

Patent

active

059923814

ABSTRACT:
A process to determine an optimal richness of a fuel-air mixture supplied to an internal combustion engine. The engine has a speed regulator capable of varying an opening angle of a valve for admitting the fuel-air mixture into the engine to maintain the engine at a constant rotational speed. The process begins by supplying an initial fuel-air mixture to the engine. A rotational speed of the engine is regulated by acting on a position of a valve controlling the admittance of the initial fuel-air mixture and, therefore, the fuel-air mixture affects the rotational speed. A plurality of jumps in the richness of the fuel-air mixture which is supplied to the engine act on the position of the valve. Variations in the position of the valve corresponding to each of the jumps in richness in the initial fuel-air mixture are then measured. It is then deduced that when the variations in the valve position are lower than a threshold that the initial fuel-air mixture is at an optimal richness, and that when the variations in the valve position are higher than the threshold that the richness of the initial air-fuel mixture must be modified. A correction of the richness of the initial fuel-air mixture supplied to the engine is performed if the threshold is exceeded. In addition, the correction step takes into account an amplitude of the measured variations in the valve position.

REFERENCES:
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patent: 4442815 (1984-04-01), Ninomiya
patent: 4479476 (1984-10-01), Suzuki et al.
patent: 4538578 (1985-09-01), Suzuki et al.
patent: 4864991 (1989-09-01), Snyder et al.
patent: 5284113 (1994-02-01), Svensson
International Publication No. 95/06199 (Svensson et al.), dated Mar. 2, 1995.

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