Method of and system for controlling air fuel ratios of mixtures

Details Method of and system for controlling air fuel ratios of mixtures Method of and system for controlling air fuel ratios of mixtures

1974-10-18

1977-07-05

Hart, Douglas

Power plants

Internal combustion engine with treatment or handling of...

Methods

60282, 60285, 60289, F02B 7510

Patent

active

040331229

ABSTRACT:
One-half of combustion chambers is fed with a lean air-fuel mixture the ratio of which is above the ratio at which maximum quantities of NO.sub.x are formed and the other half with a rich mixture the ratio of which is below the ratio at which maximum quantities of NO.sub.x are formed, the rich mixture ratio depending on vehicle speed. Above a predetermined load all chambers are fed with a richer-than-stoichiometric mixture and air may be added to the exhaust.

REFERENCES:
patent: 3708980 (1973-01-01), Truxell
patent: 3785153 (1974-01-01), Schwing
patent: 3827237 (1974-08-01), Linder
patent: 3861366 (1975-01-01), Masaki
patent: 3910240 (1975-10-01), Omori

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