Patent ID: 7671601
Filing Date: 2010-03-02
Classification: F02D,F02M

Abstract:
1. An abnormal condition detecting device for an engine control system comprising: an electric motor and a control member driven by the electric motor for controlling physical quantity related to engine performance; a position sensor for detecting a position of the control member; and an electronic control unit for driving the electric motor in accordance with operational condition of an engine, so that an actual physical quantity is controlled to reach a target physical quantity calculated by the electronic control unit based on the operational condition of the engine, wherein the electronic control unit comprises: a motor driving circuit for supplying electrical power to the electric motor through power supply lines; and an abnormal condition detecting circuit for detecting an electrical abnormal condition of the electric motor and/or the power supply lines, when the power supply from the motor driving circuit to the electric motor is stopped, and wherein the electronic control unit performs: detecting whether an engine start signal is received after an ignition key is inserted into a key cylinder of a vehicle; determining that a condition for detecting the abnormal condition for the electric motor and/or power supply lines is satisfied, when the ignition key is inserted into the key cylinder and the engine start signal is not received; and determining whether any electrical abnormal condition occurs in the electric motor and/or the power supply lines.