However, these opinions directly affected thousands of car owners in China. Here is a survey data. It can be seen that more than 90% people have the habit of hot car in situ.
However, the original floor heating car is wrong.
First listen to what the university professor has to say ▼
Liu Shi, vice president and professor of beijing police college, director of special driving training center for automobiles, is the first generation driver in China.
Speaking of the topic of hot car in situ, Professor Liu Shi is deeply touched. He said that he had done ten years' popularization work to solve this problem, and hoped that everyone would not warm up their cars in the same place.
Cause analysis: Because the structure and lubrication of vehicles in the past were different from those in the present. In the past, the structure of vehicles was a low-speed and long-drive connecting rod, and the lubricating oil used was a single-stage lubricating oil according to different seasons. Our present engine structure has been improved. It has high speed, short connecting rod for transmission and synthetic all-weather engine oil for lubricating oil. Then there is no need to preheat.
Liu Jiaoshou's point of view is clear. He pointed out that ▼
After the automatic car is started, it must leave within 10 seconds.
After the manual transmission car is started, it must leave within 30 seconds.
Liu Jiaoshou said that you should do warm-up exercises while exercising and carrying heavy loads. This will protect the engine. How to protect it? (Hot cars meet on the road) Minimize the formation of carbon deposits and fully burn combustible gases.
What do they think of those car manufacturers? ▼
Shanghai Volkswagen brand-new Tiguan maintenance manual
There is a special sentence in it: after the engine starts, don't stay in the same place to warm up, but start driving immediately. This will not only make your engine reach the working temperature quickly, but also reduce exhaust emissions.
BMW's instructions clearly state: Don't warm up the engine when parking, but start the car at an appropriate speed immediately.
Correct warm-up steps ▼
① Go on the road 30 seconds after startup to 1 minute.
② Do not drive at high speed, but keep driving at low speed, and the engine speed should not exceed 3,000-3,500 rpm. (Otherwise, the severe wear and tear suffered by the engine and gearbox cannot be recovered. )
③ After the engine temperature rises to the normal working temperature, resume the "personal habit" normal driving.
Many car owners think that hot cars will make the engine produce carbon deposits. In fact, the generation of carbon deposit has nothing to do with warming the car. The main reason of carbon deposition is that the engine runs under medium and small load for a long time, and carbon deposition only occurs when the temperature of the engine combustion chamber is too low.