Test on protection strategy for high temperature shutdown of a natural gas engine
In order to solve the high temperature failure of the engine that occurs in high temperature areas,the cause and harm of the high temperature of the engine is investigated.By logical analysis,the engine protection mechanism is formulated,and the torque is limited when the engine is overheated.Lock the throttle openness in the initial state of 3 protection strategies and test it,select the best of the three control strategies to increase the delayed parking action for real car test verification.The results show that the protection strategy of setting up speed limit triggering fuel supply is the best effect among the 3 control strategies.On the basis of this strategy,when the shutdown time is delayed by 150 s,the maximum temperature of the cooling water after shutdown is 98.5℃,which meets the needs of use.
high temperature faultengine protectiondelay shutdowncontrol strategy
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