Operational control system for engine

Internal-combustion engines – Engine speed regulator – Idle speed control

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Details

123421, F02P 515

Patent

active

053098820

ABSTRACT:
A control system for the ignition system of an internal combustion engine for providing faster idle speed when the engine is at a low temperature by advancing the spark timing. A first temperature sensor which senses actual temperature is mounted in the engine ignition control circuit which is, in turn, mounted in proximity to the engine so as to approximate its temperature. A on/off temperature switch is mounted directly in the engine so as to sense when engine temperature is above a predetermined value. The system is operative to provide ignition control by the actual engine temperature unless the second on/off switch is turned on to indicate that the engine temperature has not returned ambient temperature after a running period. If the engine temperature switch is on, normal ignition timing is employed.

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patent: 5080067 (1992-01-01), Nakamura
patent: 5197430 (1993-03-01), Hoshiba et al.
patent: 5222470 (1993-06-01), Oonuma et al.

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