Extremely low temperatures render car engines unable to run. The main reason is that the viscosity of the grease increases, the capacity of the battery decreases and the atomization of the poor fuel.
The viscosity of the engine oil increases as the temperature decreases, and the flow performance decreases, which leads to a decrease in the lubrication level of the engine and an increase in the frictional resistance of the crankshaft.
When the battery is at low temperature, the viscosity of the electrolyte also increases, the penetration ability decreases, and the increase in internal resistance causes the battery power and terminal voltage to decrease significantly, and even cannot be charged and discharged. The current prevents the starter from getting the power it needs and failing to meet the cranking rate specification.
Due to the low temperature, the crankshaft speed ratio of the engine used to run the car engine is not high, the temperature of the air inlet and the gas flow rate are low, and the quality of the atomization of the fuel is poor, which further increases the difficulty of running the car engine.
Under low temperature conditions, various oils have low viscosity and poor fluidity, which makes the operation of the roller difficult and aggravates the damage of the parts.
The viscosity of the grease is high, the loss of oil mixing power during the operation of the organization is enlarged, the displacement of the engine is reduced, and the efficiency of the transmission is low, thereby reducing the driving ability of the roller and the excitation regulator.
The poor flow of grease increases the difficulty of lubricating some parts and reduces the effect of lubricating, thus aggravating the damage of engine and gearbox components.
The low viscosity of the working fluid also increases the frictional resistance of the pipeline, which makes it more difficult for the hydraulic press to operate, the efficiency of the braking system driven by the hydraulic press decreases, and the difficulty of driving increases, which affects the work of the engine caused bad harm. Driving safety.
There is also a common risk of freezing during construction in cold seasons. For example, freezing the electrolyte of a rechargeable lithium battery will cause it to stop working. Freezing water cooling and heat dissipation The cooling circulating water of the automobile engine will freeze the heat pipe radiator and cylinder liner.
