Why does the speed increase when the cold car starts, but not when it speeds up?

The main reason for this is that if the engine does not reach the normal working state, ECU will increase the fuel injection by default, resulting in an increase in engine speed. At the same time, if the working conditions are not good, the power is not high and the power is insufficient.

When starting the vehicle in winter, first turn the ignition switch to the first gear. At this point, the water temperature indicator on the dashboard lights up, which takes about a few seconds and goes out automatically. At this time, the starter can be started without idling.

The working efficiency of the engine is related to the water temperature. Experiments show that when the water temperature is lower than 40℃, the fuel consumption will increase by 6%. In winter, the driving time during automatic start-up should be appropriately extended, and the rotation speed should be controlled within 3000 rpm, and normal driving should be started after the water temperature and lubricating oil temperature rise. In addition, pay attention to the water temperature during driving. Generally speaking, the water temperature of 70℃-90℃ is ideal.

Extended data:

Precautions for cars in winter:

1, to prevent the windows from freezing.

You can open the door or window before leaving the vehicle, so that the air inside and outside the vehicle can convect for a short time, so as to avoid freezing caused by residual water vapor inside the vehicle.

2. Get off the bus and erect the wiper or pad cloth.

In order to prevent the wiper from freezing, remember to stand up the wiper when you park and leave, so as not to freeze the wiper. Some models of wipers can't hold up, so you can put useless towels on the windshield. Because the wiper is isolated from the windshield, the wiper will not freeze.

3. Get off and drink water.

The temperature at night in winter will be lower than during the day, and in some areas, the temperature at night can even reach below -20, so when you get off the bus, you must take the food and drinking water out of the car, otherwise the drinking water will freeze into ice at night because of the low temperature, and the food will freeze because of the low temperature, resulting in the loss of food nutrition.