Method and apparatus for controlling ignition timing based on fu

Details Method and apparatus for controlling ignition timing based on fu Method and apparatus for controlling ignition timing based on fu

1993-07-06

1995-01-24

Nelli, Raymond A.

Internal-combustion engines

Spark ignition timing control

Electronic control

123416, 123417, F02M 700

Patent

active

053834321

ABSTRACT:
Method and apparatus for controlling ignition timing during alternating rich and lean fuel-air composition excursions for efficiency and for controlling torque fluctuations associated with the excursions. The method, for use in a vehicle having an internal combustion engine including an electronic fuel and spark control module, includes reducing spark advance instantaneously during a rich fuel-air excursion, and increasing spark advance during a lean fuel-air excursion. The amount of spark advance adjustment is preferably determined utilizing nonlinear functions which relate spark, torque ratios, and air-fuel ratios.

REFERENCES:
patent: 4584978 (1986-04-01), Sasaki et al.
patent: 4587938 (1986-05-01), Kobayashi et al.
patent: 4715340 (1987-12-01), Cook et al.
patent: 4854286 (1989-08-01), Chemnitzer
patent: 4942860 (1990-07-01), Chujo et al.
patent: 5101787 (1992-04-01), Kako
patent: 5213178 (1993-05-01), Polidan et al.

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