Exhaust gas cooling device's control valve diagnosing method for vehicle's power train, involves simulating temperature by simulator so that gas flow is oriented to by-pass/network, and verifying whether valve orients flow towards by-pass

摘要

#CMT# #/CMT# The method involves connecting a temperature simulator at the place of a temperature probe e.g. temperature variable resistor. A predetermined temperature is simulated by using the simulator such that an exhaust gas flow is oriented towards a by-pass or an exchange network of an exhaust gas cooling device, where the temperature is lower than 55 degrees Celsius. Verification is made whether a control valve orients the flow towards the by-pass, where the valve is controlled by an actuator of the device. #CMT# : #/CMT# An independent claim is also included for a temperature simulator connected at the place of a temperature probe. #CMT#USE : #/CMT# Method for diagnosing a control valve of an exhaust gas cooling device in a power train of a vehicle, during maintenance operation of the vehicle or on test bench of an internal combustion engine of the vehicle. #CMT#ADVANTAGE : #/CMT# The simulator eliminates the need to consider a real temperature of the engine for verifying whether the actuator of the exhaust gas cooling device operates correctly or not, thus rapidly carrying out the verification when the engine is cool, without any burning risk. #CMT#DESCRIPTION OF DRAWINGS : #/CMT# The drawing shows a flowchart of a control valve diagnosing method. '(Drawing includes non-English language text)'.