Lean burn internal combustion engine

Details Lean burn internal combustion engine Lean burn internal combustion engine

1992-08-04

1993-03-02

Dolinar, Andrew M.

Internal-combustion engines

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

123412, 123417, 123486, F02D 4304

Patent

active

051900084

ABSTRACT:
A lean burn internal combustion engine has a basic fuel injection amount calculated and multiplied by a lean correction factor, the resulting amount controls the air fuel ratio of the engine. The lean correction multiplied by factor is calculated from a first map based on intake pressure and engine speed. However, when the degree of opening of the throttle valve is larger than a predetermined value, a second correction map based on the degree of opening of the throttle valve and engine speed is used to obtain the lean correction factor. When the second correction map is employed, an ignition timing map based on the degree of opening of the throttle valve and engine speed is used to obtain an ignition timing; instead of the usual ignition timing, based on intake pressure and engine speed.

REFERENCES:
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patent: 4332315 (1981-04-01), Geiger et al.
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patent: 4520783 (1985-06-01), Matsushita et al.
patent: 4587938 (1986-05-01), Kobayashi et al.
patent: 4590563 (1986-05-01), Matsumura et al.
patent: 4651700 (1987-03-01), Kobayashi et al.
patent: 4719888 (1988-01-01), Kobayashi et al.
patent: 4725955 (1988-02-01), Kobayashi et al.

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