With the increasingly strict environmental protection requirements, energy-saving and emission reduction has become a factor that cars are gradually being valued. More and more cars are beginning to be equipped with automatic engine start-stop technology. This technology is especially suitable for urban road conditions. When the red light is waiting for the engine to be temporarily turned off, the fuel consumption caused by idle speed can be saved. As with all new technologies being installed into the product, the engine's automatic start-stop technology is also subject to many questions. Does it really save energy and reduce emissions, contribute to environmental protection, and save money for car owners? Stop and stop the road, is there any damage to the engine?
Principle of automatic engine start-stop technologyIf you want to know if the engine's automatic start-stop technology is harmful to the car, we have to start with its principle.
When the vehicle stops traveling due to congestion, the driver depresses the brake pedal and picks up the gear, and the vehicle is stationary. At this time, the automatic start-stop system starts self-test. When it finds that the engine is idling and there is no gear, the wheel speed sensor reads zero, so it continues to check if the vehicle has enough power for the next start. When the above conditions are met, the engine will automatically stop working. After a while, you have to leave, so you release the brakes, step on the accelerator pedal, and the engine will re-ignite immediately.
The idea of ​​engine start-stop technology has been around since the 1930s, and the application of the car dates back to the 1970s. At that time, Toyota had carried out a practical test of similar technology on the Crown sedan. When the vehicle stopped for 1.5 seconds, the engine would automatically cut off the oil and extinguish the flame. This can be said to be the prototype of the automatic start and stop technology of the engine. In the 1980s, Volkswagen and Fiat will produce their cars, but it was not until 2006 that automatic start-stop technology became popular.
Engine start-stop technology is a new bright spot in recent years. Many cars are already equipped with this technology, especially in Europe. Now coverage has reached 40%, and it is expected to reach 90% in 2019. The technical content of this function is actually not high, and the cost is not high.
In China, this technology seems to be positioned as a “high-up†configuration. Like luxury brands, some models like Audi, BMW and Mercedes-Benz already have standard models or will be equipped with an automatic start-stop system. In other brands, the engine starts. Stopping technology is often a selling point. However, in the eyes of many car owners in China, even with these configurations, many car owners choose to turn it off, which makes this new energy-saving science a display. There are many reasons for this. In addition to the poor performance of some models, more car owners worry that starting and stopping the engine so frequently will cause some damage to the engine.
Will it hurt the engine?In fact, the wear of the engine is mainly from the cold start, the wear in the normal working temperature of the engine is very small, and the wake-up conditions of the start-stop technology we are worried about are also limited. When the vehicle is cold start or the engine water temperature and the oil temperature are not up to normal, such a function will not be activated, that is to say, even if the vehicle is stopped at this time, the engine will not start and stop by itself. When the hot start is started, since the matching clearance between the engine parts and the lubricating oil of the engine have entered the optimal state, the engine start and stop is activated at this time, and the wear of the engine is also small at this time. However, one thing that cannot be ignored is that the role of the oil at this time is very important. Therefore, the vehicle equipped with the start-stop technology should use very high-grade oil, so as to effectively protect the engine from damage.
Conditions for starting and stopping the systemThe start-stop system enters the working state at the expense of the normal operation of other systems of the vehicle, such as when the battery power is lower than the limit value, the vehicle air-conditioning system is performing de-fogging work, the pressure in the brake system drops below a certain point, and the vehicle appears. When the vehicle is "sliding forward" or backward, the start-stop system will not extinguish the engine, and if the engine is turned off, it will restart without delay.
This technology is not practical at all. In general, basically every technology that is widely implemented has a very high practicality. As for the engine start-stop technology, the most practical measure of its practicality is to see if it can save fuel and how much oil can be saved. In fact, some statistics say that if it is on a very crowded road with a lot of traffic lights, the start-stop system can save up to 15% of fuel. As for whether or not this data can be achieved, the professor has not really experienced it, but in actual use, this The technology is sure to contribute to fuel economy, but the driving experience that this fuel consumption is worth is not worth it. This needs to be measured by yourself. However, the professor believes that since it can save energy and reduce exhaust gas, but also save money, this is the best effect of both. If the environment of your car is mostly not crowded, then this technology is not very useful for you.
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