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我国北方地区冬季最低气温可达-30℃以下,在这种低气温条件下工作的工程机械,其柴油机启动十分困难。对于采用分动箱驱动液压泵的工程机械,低气温启动困难问题更为突出。1.低气温启动困难原因(1)启动扭矩减小对于电启动柴油机来说,其启动扭矩的大小与蓄电池的容量有关。蓄电池工作的最佳环境温度在10～40℃之间。当环境温度降低时,蓄电池电容量随之降低,柴油机启动扭矩大幅度减小。(2)启动阻力矩增大
The lowest winter temperatures in northern China up to -30 ℃ below the working conditions in this low-temperature construction machinery, the diesel engine start very difficult. For the use of transfer case driven hydraulic pump construction machinery, low temperature start-up problems more prominent. 1. Low temperature start difficult reasons (1) reduce the starting torque for electric start diesel engine, the starting torque and the size of the battery capacity. The best battery temperature of 10 ~ 40 ℃. When the ambient temperature decreases, the battery capacity decreases, diesel starting torque significantly reduced. (2) Start resistance torque increases