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After the Euro II emission standard was upgraded to the Euro III electronically controlled common rail era, it can be said that the truck circuit system has undergone epoch-making changes, and more and more new words and new technologies are constantly appearing. Take Dongfeng Tianlong as an example. With the addition of VECU and EECU equipment, what are they used for?
VECU is called vehicle electronic control unit
VECU has power relay management function, vehicle speed limit function, electronic throttle management, cruise control, low idle speed and fast idle speed adjustment, engine protection and other functions.
Take the engine protection function as an example. The VECU compares the engine oil pressure, water temperature, water level and other signals with the set parameters. After the alarm value exceeds the alarm value for a certain period of time, the VECU sends an alarm message to the instrument, and when it is serious, it sends a stop command to the EECU to start The role of protecting the engine.
EECU is called engine control unit
The main function of EECU is to control the exhaust brake solenoid valve, electronic fan, injector solenoid valve, etc. by detecting the information of various sensors on the engine and the information sent by the VECU on the CAN bus, so as to ensure the normality of the engine run. It can be understood that the main function of EECU is a computer that collects various signals and controls the normal operation of the engine.
The data exchange between VECU and EECU is through CAN bus communication. If CAN bus communication fails, the engine will not start.
This structure is different from the concept of a computer that collects various data to control the engine that we have learned before. It is a computer that collects data and shares information to control the entire vehicle's electronic control system.
After the Euro II emission standard was upgraded to the Euro III electronically controlled common rail era, it can be said that the truck circuit system has undergone epoch-making changes, and more and more new words and new technologies are constantly appearing. Take Dongfeng Tianlong as an example. With the addition of VECU and EECU equipment, what are they used for?
VECU is called vehicle electronic control unit
VECU has power relay management function, vehicle speed limit function, electronic throttle management, cruise control, low idle speed and fast idle speed adjustment, engine protection and other functions.
Take the engine protection function as an example. The VECU compares the engine oil pressure, water temperature, water level and other signals with the set parameters. After the alarm value exceeds the alarm value for a certain period of time, the VECU sends an alarm message to the instrument, and when it is serious, it sends a stop command to the EECU to start The role of protecting the engine.
EECU is called engine control unit
The main function of EECU is to control the exhaust brake solenoid valve, electronic fan, injector solenoid valve, etc. by detecting the information of various sensors on the engine and the information sent by the VECU on the CAN bus, so as to ensure the normality of the engine run. It can be understood that the main function of EECU is a computer that collects various signals and controls the normal operation of the engine.
The data exchange between VECU and EECU is through CAN bus communication. If CAN bus communication fails, the engine will not start.
This structure is different from the concept of a computer that collects various data to control the engine that we have learned before. It is a computer that collects data and shares information to control the entire vehicle's electronic control system.
