Air-fuel ratio control method for an internal combustion engine

Details Air-fuel ratio control method for an internal combustion engine Air-fuel ratio control method for an internal combustion engine

1988-03-30

1989-12-12

Wolfe, Willis R.

Internal-combustion engines

Charge forming device

Auxiliary air or oxygen added to combustible mixture

123179G, F02M 2310

Patent

active

048860352

ABSTRACT:
An air-fuel ratio control method which controls the amount of the intake side secondary air in accordance with either the engine temperature or both of the engine temperature and the intake air temperature upon the engine re-start under a high engine temperature, thereby avoiding enrichment of the intake air-fuel ratio even at the occurrence of the percolation phenomenon and to improve the engine-start property. Furthermore, the amount of the intake side secondary air is controlled until the start of the air-fuel ratio feedback control to accomplish improvement in the purification of the exhaust gases and in the stability of the engine speed at an idle state.

REFERENCES:
patent: 3960130 (1976-06-01), Peterson
patent: 3977380 (1976-08-01), Atsumi et al.
patent: 4043310 (1977-08-01), Ichimiya et al.
patent: 4108127 (1978-08-01), Chapin et al.
patent: 4414943 (1983-11-01), Nagase
patent: 4495904 (1985-01-01), Sakaino et al.
patent: 4773378 (1988-09-01), Fujimura et al.

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