Why does the cold weather suddenly increase fuel consumption?

Fuel consumption will increase in cold weather, and air density may increase after the temperature drops.

At this time, the air resistance is even greater when driving. Of course, the fuel consumption of cars may also increase. Moreover, at low temperature, when the engine is just started, the preheating time is longer than usual, and of course, the fuel consumption may also increase.

When the temperature is low, the idle speed of the engine will be higher than usual, and ecu will inject more fuel to increase the engine speed and make the engine reach the normal working temperature as soon as possible. Because the outside temperature is relatively low, of course, it takes longer for the engine to reach the normal working temperature than usual, so it will consume more fuel. The fuel consumption of vehicles in winter is definitely higher than that in other seasons, because more heat energy is needed in winter, and the engine must do more work to maintain the working temperature.

principle of operation

Because the cooling water will take away some heat in the circulation, the cooling water will take away more heat in winter than in summer, which makes it difficult to maintain the normal working temperature of the engine. In this case, the engine will also maintain its normal operation by increasing fuel injection.

Hot air will not start the air conditioning compressor, but will send hot air from the engine water tank to the cab, thus heating the room. Many people think that this kind of hot air will be generated even if it is not used, and there will be no additional energy consumption and oil consumption. The hot air in the engine water tank can really warm the cab, but if the hot air is insufficient, the engine will do extra work and generate more heat energy to meet the temperature requirements of the cab, which means extra fuel consumption.