Ignition timing control system and method for internal...

Internal-combustion engines – Spark ignition timing control – Electronic control

Reexamination Certificate

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C123S406190, C701S102000

Reexamination Certificate

active

07451739

ABSTRACT:
An ignition timing control system for an internal combustion engine, which is capable of reducing the capacity of a memory that stores data used in controlling ignition timing, thereby reducing manufacturing costs. An ignition timing control system that controls ignition timing of an internal combustion engine calculates a maximum torque parameter indicative of a maximum torque that the engine can output when the engine is at the detected rotational speed, according to the detected rotational speed, calculates an output torque parameter indicative of an output torque being output from the engine, calculates a torque ratio as a ratio between the output torque parameter and the maximum torque parameter, and determines the ignition timing according to the engine speed and the torque ratio.

REFERENCES:
patent: 6039023 (2000-03-01), Cullen et al.
patent: 6834638 (2004-12-01), Lee
patent: 6932053 (2005-08-01), Ichihara et al.
patent: 7143741 (2006-12-01), Yagi
patent: 03172554 (1991-07-01), None
patent: 6-248988 (1994-09-01), None
patent: 2005-315161 (2005-11-01), None
patent: 2006-29194 (2006-02-01), None

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