Internal-combustion engines – Engine speed regulator – Idle speed control
Patent
1983-08-19
1985-04-30
Cox, Ronald B.
Internal-combustion engines
Engine speed regulator
Idle speed control
123589, 123352, F02D 1110
Patent
active
045137110
ABSTRACT:
In a system for regulation of the idling speed of an internal combustion engine acting through an electrical positioning means for the minimum-opening position of the throttle valve, the building-up of troublesome fluctuations in engine speed as the result of the characteristics of the regulation loop is counteracted in response to detection of the rise of such fluctuations or of their imminence as the result of an excessively rich mixture (on the basis of the signal from a probe in the exhaust pipe). When such a condition is detected, the amplification factors in the controller stage of the regulation loop are reduced, the reference desired idling speed value is raised and the lower limit of the regulation range is also raised. These parameters are returned to normal when the throttle valve moves away from its idling speed position.
REFERENCES:
patent: 4337742 (1982-07-01), Carlson
patent: 4380979 (1983-04-01), Takase
patent: 4425888 (1984-01-01), Engel
patent: 4428341 (1984-01-01), Hassler
patent: 4462360 (1984-07-01), Kobayashi
patent: 4471735 (1984-09-01), Collonia
Braun Gunter
Kratt Alfred
Schleicher Rolf
Cox Ronald B.
Robert & Bosch GmbH
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