Patent ID: 7451739
Filing Date: 2008-11-18
Classification: F01L,F02B,F02D,F02P,Y02T

Abstract:
1. An ignition timing control system for controlling ignition timing of an internal combustion engine, comprising: rotational speed-detecting means for detecting rotational speed of the engine; maximum torque parameter-calculating means for calculating a maximum torque parameter indicative of maximum torque that the engine can output when the engine is at the detected rotational speed, according to the detected rotational speed; output torque parameter-calculating means for calculating an output torque parameter indicative of output torque being output from the engine; torque ratio-calculating means for calculating a torque ratio as a ratio of one of the calculated maximum torque parameter and the output torque parameter to the other; and ignition timing-determining means for determining the ignition timing according to the rotational speed of the engine and the calculated torque ratio.