Low temperatures make engine start-up difficult, mainly due to increased lubricant viscosity, reduced battery capacity and poor fuel atomization.
The viscosity of the oil increases as the temperature decreases, and the flow properties deteriorate, resulting in deterioration of the engine lubrication conditions and an increase in the rotational resistance of the crankshaft.
At low temperature, the viscosity of the electrolyte also increases, the permeability decreases, and the internal resistance increases so that the battery capacity and terminal voltage decrease significantly, and even cannot be discharged. The voltage drop makes the starter unable to obtain the required output power, and it is difficult to meet the requirements of the starting speed.
Due to the low temperature, the crankshaft speed of the engine start is not high, the temperature of the intake pipe and the gas flow rate are low, and the atomization quality of the fuel is poor, which further increases the difficulty of engine starting.
At low temperatures, the viscosity and poor fluidity of various fluids make it difficult to run the roller and aggravate the wear of the parts.
The viscosity of the lubricating oil is large, and the loss of oil stirring power during the operation of the mechanism increases, which reduces the engine power and the efficiency of the transmission system, thereby reducing the driving capacity of the roller walking and excitation mechanism.
The poor fluidity of lubricating oil makes it difficult to lubricate some components and reduces the lubrication effect, thus aggravating the wear of engine and transmission components.
The viscosity of the working oil is large, and the resistance of the pipeline is increased, which makes the hydraulic steering operation difficult, and the efficiency of the hydraulic drive brake becomes worse, which increases the difficulty of driving, and has an adverse impact on safe driving.
There are also common freezing hazards in construction in the cold season, such as: the electrolyte of the battery will freeze and stop working; Freezing of cooling water in water-cooled engines can freeze and crack the radiator and cylinder block.
