Patent ID: 7280910
Filing Date: 2007-10-09
Classification: F02D

Abstract:
1. A method of protecting an engine which is provided with an electronic control fuel injection system, comprising the steps of: detecting a quasi-abnormality of at least one of variables in connection with the engine and parts associated with the engine; when the quasi-abnormality of the at least one of the variables is detected and lasts for a predetermined period of time, regulating a throttle opening of an electronic control throttle, to thereby limit an engine rotational speed to a low rate, wherein, the at least one of the variables is a temperature of an engine cooling water, the quasi-abnormality thereof is a state that the temperature of the engine cooling water is not less than a predetermined temperature; and freeing the regulation of the throttle opening of the electronic control throttle when an abnormality of cooling water has been avoided, so that a control mode is changed over to a fuel injection control using the electronic control fuel injection system.