Air-fuel ratio control device for an engine

Details Air-fuel ratio control device for an engine Air-fuel ratio control device for an engine

1991-10-31

1992-09-15

Argenbright, Tony M.

Internal-combustion engines

Means to whirl fluid before, upon, or after entry into...

Having multiple oxidant inlet means

123422, 123478, 123492, F02D 4104, F02D 4110

Patent

active

051468859

ABSTRACT:
An air-fuel ratio control device for an engine, by which the air-fuel ratio of the air-fuel mixture supplied to the engine is changed. The device set the air-fuel ratio to a lean mixture when the engine load is lower than a set load value and predetermined set speed, and when the engine load become higher than the set load value, or the engine speed exceeds the set speed, the device switches the air-fuel ratio from a lean mixture to a rich mixture to obtain higher engine output. The set load value is varied in accordance with the engine speed such that it is reduced as the engine speed is increased.

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patent: 4594984 (1986-06-01), Raff et al.
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patent: 4759329 (1988-07-01), Nobuo et al.
patent: 4936278 (1990-06-01), Umeda
patent: 5014668 (1991-05-01), Klenk et al.

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