Patent ID: 9541023
Date: 2017-01-10
CPC Classifications: F02D,F02N,F02P,G01M

Claim:
1. A method for determining causes of engine stop using ignition power monitoring, the comprising the steps of: in a state in which a vehicle is started and an engine is driven, performing ignition power holding determination to determine whether the vehicle is in a key-on state, to which power is consistently applied, in order to hold a condition of starting of the engine of the vehicle; when ignition power is turned off and the engine is stopped, performing power-off recognition time comparison to compare a time required to recognize ignition power-off in an Electronic Control Unit (ECU) with a preset ignition power-off recognition time for failure determination; and performing power abnormality determination to determine if the engine is stopped due to ignition power failure based upon the time required to recognize the ignition power-off in the ECU is not greater than the preset ignition power-off recognition time.