Low temperatures make it difficult to start the engine, mainly due to increased lubricating oil viscosity, reduced battery working capacity and poor fuel atomization.
The viscosity of the oil increases with the decrease in temperature, and the flow performance deteriorates, so that the engine lubrication conditions deteriorate and the rotational resistance of the crankshaft increases.
When the battery is low temperature, the viscosity of the electrolyte also increases, the permeability decreases, and the increase in internal resistance makes the battery capacity and terminal voltage significantly decrease, and even cannot be discharged. The voltage reduction 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 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 starting the engine.
Under low temperature conditions, the viscosity and poor fluidity of various oils bring difficulties to the operation of the roller and aggravate the wear of the parts.
The viscosity of the lubricating oil is large, and the oil stirring power loss when the mechanism is running increases, so that the engine power decreases and the efficiency of the transmission system is low, thereby reducing the driving ability of the roller walking and excitation mechanism.
The poor fluidity of lubricating oil increases the difficulty of lubrication of some components, reduces the lubrication effect, and thus aggravates the wear of engine and transmission parts.
The viscosity of the working oil is large, and the resistance of the pipeline is increased, making the hydraulic steering maneuvering difficult, the efficiency of the hydraulic drive brake deteriorating, increasing the difficulty of driving, and adversely affecting safe driving.
There are also widespread freezing hazards in cold season construction, such as: the electrolyte of the battery will be frozen to stop working; Freezing of the cooling water of a water-cooled engine can freeze the radiator and cylinder block.
