Patent ID: 7735360
Filing Date: 2010-06-15
Classification: F02D,F02N,G01P

Abstract:
1. A method for determining the reversal of the direction of engine rotation for internal combustion engines equipped with a crankshaft fitted with a target wheel comprising teeth, one of which is a long tooth, with a unidirectional crankshaft position sensor delivering a signal used for counting the teeth, with a tooth counter, and with an engine management device comprising a processor and a model of the engine behaviour in a stalling phase, the method comprising the steps consisting in: characterized in that the model of the engine behaviour is a second-order polynomial function of time t, and in that the position of reversal of the direction of rotation of the engine is estimated from the calculation of the position of the peak S of this second-order polynomial function of the type: where a, b and c are three real numbers.