System and method for controlling ignition timing for internal c

Details System and method for controlling ignition timing for internal c System and method for controlling ignition timing for internal c

1988-10-17

1990-06-05

Nelli, Raymond A.

Internal-combustion engines

Combustion chamber means combined with air-fuel mixture...

123416, 36443105, F02P 504

Patent

active

049304771

ABSTRACT:
A system and method for controlling an ignition timing for an internal combustion engine mounted in a vehicle are disclosed in which a limit value for the ignition timing value is provided so that a difference between a current ignition timing and a previous ignition timing is within the limit value and the limit value is set according to a magnitude of an engine acceleration. For example, when an abrupt engine acceleration occurs, the limit value is set to 15 degrees. When the engine is in a steady state (no abrupt acceleration from an idling condition), the limit value is set to four degrees. Therefore, no vehicle body shock occurs due to the abrupt change in an engine output torque caused by the abrupt change in the ignition timing and a response characteristic of a rise in the engine output torque during the abrupt acceleration can be assured.

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