Ignition timing control system and method for...

Details Ignition timing control system and method for... Ignition timing control system and method for...

2005-06-21

2005-06-21

Mohanty, Bibhu (Department: 3747)

Internal-combustion engines

High tension ignition system

C123S19800E

Reexamination Certificate

active

06907871

ABSTRACT:
There is provided an ignition timing control system for a variable-cylinder internal combustion engine, which is capable of optimally reducing torque before the start of fuel cut-off operation, irrespective of whether the engine is in an all-cylinder operation mode or a partial-cylinder operation mode, thereby reducing shock caused by the fuel cut-off operation. When the internal combustion engine is operated under deceleration operating conditions, the start of cut-off of fuel supply is delayed for a predetermined time period, and ignition timing is corrected when the cut-off of fuel supply is being delayed for the predetermined time period. The amount of correction of the ignition timing is set to a different value depending on the operation mode.

REFERENCES:
patent: 4977876 (1990-12-01), Nanyoshi et al.
patent: 5680849 (1997-10-01), Morikawa et al.

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