Internal combustion engine

Details Internal combustion engine Internal combustion engine

1988-12-01

1989-12-05

Wolfe, Willis R.

Internal-combustion engines

Charge forming device

Auxiliary air or oxygen added to combustible mixture

123327, F02M 2308

Patent

active

048845507

ABSTRACT:
An air and fuel mixing, modulating and supply means for a spark ignition internal combustion engine includes an air inlet manifold in effective connection with air and fuel metering means including a throttle. Two separate passages are provided which passages include holes in the inlet manifold. Each passage is controlled by a respective valve. Control means open or close the valves depending on engine condition. The first larger passage is effective to reduce engine vacuum when the engine speed is greater than a 1,000 rpm and the throttle is closed. The second smaller passage is effective to allow a small amount of additional air into the inlet manifold when the throttle is open and the engine speed is above 1,500 rpm.

REFERENCES:
patent: 3744464 (1973-07-01), Soltau
patent: 4344406 (1982-08-01), Minor et al.
patent: 4532900 (1985-08-01), Hibino et al.
patent: 4553521 (1985-11-01), Kishida et al.
patent: 4569318 (1986-02-01), Fujimura et al.
patent: 4586481 (1986-05-01), Kishida et al.
patent: 4594977 (1986-06-01), Shimamura et al.
patent: 4677959 (1987-07-01), Suzuki et al.

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