Why does the fuel consumption of cars increase when it is cold? What is the reason?
The optimum working temperature of the engine is about 90 degrees, so it should be kept at this temperature all the time during the working process. If this temperature is not reached, the computer will control to increase the fuel injection and consume more gasoline to keep warm. The thermostat is set at about 90 degrees. When the temperature is lower than the set temperature, the thermostat is closed, the engine cooling system is in a small cycle state, and the vehicle can be heated quickly. When the engine temperature is higher than the set temperature, the thermostat opens and the cooling system works in a large cycle to ensure that the engine will not overheat.
Engine water temperature is the main reason that affects fuel consumption. General water temperature refers to the temperature of engine coolant. The coolant itself is circulating, and the heat is taken away in the circulation. Therefore, under the premise of low ambient temperature, the engine temperature will rise slowly.
When the weather is cold, the atomization effect of gasoline is not as good as that in summer, because the oil itself is very cold. When the engine is running, it will burn and explode with gasoline and air. The more thorough the mixing, the more thorough the combustion and the greater the explosive force. In fact, air and liquid are difficult to mix. It needs to be atomized through the nozzle.
Many parts of the car are moving. The parts he wants to move usually need oil or lubrication. Once the temperature is lowered, the viscosity of these oils will increase. The transmission oil in the gearbox, the transmission shaft of the main reducer (a kind of gear oil) and even the air in the tire may change the pressure and increase the resistance because of thermal expansion and cold contraction.
The days are short and the nights are long in winter. Turn on the headlights more than in summer. In addition, due to the low temperature in winter, the chemical reaction speed of electrolyte slows down, which easily leads to the loss of battery power. In order to overcome the resistance during cold start in winter, the demand for power is also greater. The engine needs more fuel to convert electric energy to charge the battery, so this is also a factor to increase fuel consumption.
To sum up, it is the reason for the increase of automobile fuel consumption in winter organized by Bian Xiao. You got it?