Internal-combustion engines – Charge forming device – Including means responsive to instantaneous change in engine...
Patent
1983-05-16
1985-04-09
Lall, Parshotam S.
Internal-combustion engines
Charge forming device
Including means responsive to instantaneous change in engine...
73116, F02M 710
Patent
active
045094845
ABSTRACT:
The air/fuel ratio of the mixture supplied to an internal combustion engine is controlled to a lean limit resulting in a maximum engine operating roughness at one level during off-idle operation and a higher level during idle conditions. Roughness is detected by comparing the minimum engine speed attained during each cylinder combustion cycle to the average of the minimum speeds.
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patent: 4323042 (1982-04-01), Woodhouse et al.
patent: 4337647 (1982-07-01), Radcliffe et al.
patent: 4344140 (1982-08-01), Leung
patent: 4357662 (1982-11-01), Schira et al.
Conkey Howard N.
General Motors Corporation
Lall Parshotam S.
Wolfe W. R.
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