１．低温环境的不利因素 环境温度较低时，工程机械的故障会比平时多。因为低温环境下主要有以下不利因素。 ①发动机及其相关系统的各种电子元件性能恶化，传感器测量数据有较大误差，柴油机所用柴油的自然条件差或汽油机不易点火、汽化不良，燃烧不充分。 ②发动机机体温度低 1. Adverse factors in low temperature environment When the ambient temperature is low, the construction machinery failure will be more than usual. Because of low temperature environment mainly the following unfavorable factors. ① engine and its related systems deteriorate the performance of various electronic components, the sensor measurement data have greater errors, the diesel engine used in diesel or poor natural conditions difficult to ignite, poor vaporization, inadequate combustion. ② engine body temperature is low