Patent ID: 8447498
Filing Date: 2013-05-21
Classification: F02D,F02P,Y02T

Abstract:
1. A control device for an internal combustion engine, comprising: reference rotation position detection means which detects a reference rotation position of a crankshaft of the internal combustion engine; unit crank angle detection means which outputs a crank angle signal per unit crank angle of the crankshaft; reference crank angle cycle calculation means which calculates a reference crank angle cycle on the basis of the reference rotation position detected by the reference rotation position detection means; combustion period crank angle cycle calculation means which calculates as a combustion period crank angle cycle one of: a cycle in which the cycle of the unit crank angle becomes shortest with respect to the reference crank angle cycle; and the cycle of the unit crank angle after a predetermined crank angle has passed from an ignition position; crank angle cycle ratio calculation means which calculates a crank angle cycle ratio which is a ratio of the combustion period crank angle cycle and the reference crank angle cycle; and correction means which corrects ignition timing or a fuel injection amount in accordance with the crank angle cycle ratio at a start of the internal combustion engine.