How long can normal parking and air conditioning last?

The appropriate time is about 15 minutes. Too long time and poor heat dissipation will damage the automobile engine. In a relatively closed environment, such as a garage, it may cause carbon dioxide poisoning. It is best to turn on the air conditioner in the open air or in a place with smooth air circulation, and leave some window cracks appropriately.

Theoretically, as long as the car has oil and electricity, the air conditioner can always be on. But in reality, it usually takes about 15 minutes to stop and turn on the air conditioner. There are several reasons:

1. Stopping the air conditioner for a long time can easily lead to carbon monoxide poisoning. Similar news is not without it. There was an experiment, in a closed space, only 20 minutes, air-conditioned cars will have carbon monoxide exceeding the standard. Therefore, if the air conditioner is turned on for a long time during parking, it is necessary to open the window for ventilation at intervals, or switch to the external circulation mode;

2. Increase fuel consumption. When the engine is stopped, it runs at idle speed, resulting in low intake pressure. At this time, the engine will increase the throttle opening, thus increasing the fuel injection. Generally, turning on the air conditioner when the car is idling consumes about 1 to 2 liters of gasoline in one hour. According to the 8 yuan calculation of 1 liter gasoline, the money consumed in one hour is about 15 yuan.

3, the heat dissipation time is too long, which is harmful to the automobile engine. When the engine stops, it runs at idle speed, resulting in low oil pump pressure, which will lead to insufficient lubrication between engine friction surfaces and accelerate wear. Million car purchase subsidy