Can automatic start-stop save fuel?

Can you save fuel?

Friends all know that everything in this world is not perfect, and the advantages and disadvantages of a technology exist at the same time. Manufacturers often emphasize its advantages, but ignore or even mention its shortcomings. Can the automatic engine start-stop technology I mentioned yesterday save fuel? Will it affect engine life? Tell me about this problem that all my friends are concerned about.

Can automatic start-stop save fuel?

When the vehicle stops for a short time and starts again, the starting resistance is small because the engine is at the normal working temperature. Moreover, when starting, the engine flywheel is started with the help of the starter. At this time, the fuel consumption of starting is only equivalent to the fuel consumption of idling for 0.7 seconds, so theoretically, stopping for more than 0.7 seconds will have a fuel-saving effect.

According to the general technical specifications, the fuel saving rate of vehicles equipped with automatic start-stop can reach about 10%, and the carbon dioxide emission can be reduced by 100 kilometers15.1g.

Bosch Company of Germany has also done experiments, and the conclusion is that the average fuel saving rate is about 8% to 15%, and the greater the blockage, the more obvious the effect.

Will automatic start-stop affect engine life?

Many friends also have questions about this issue. Some people think that the automatic start-stop function is best not to be used, because frequent starting will cause piston wear, and the generated metal debris will also wear other key parts of the engine. Over time, the damage to the engine is great. That sounds like it, but when you think about it, you don't have to worry so much.

Automatic start-stop has little wear on the engine.

Frequent starting and stopping of the engine does cause greater engine wear, but they all ignore one point-most engine wear occurs when the cold car starts.

More than 80% of automobile engine wear comes from the moment of cold start, and normal idle running wear accounts for about 20%.

The working environment of automatic start-stop is hot start, and the engine is only temporarily turned off when it stops for a short time. At this time, the engine temperature is still very high, the oil viscosity is small, the fluidity is strong, and it is easy to attach to parts. There won't be much wear at this time, so don't worry too much. On the contrary, the moment we get up in winter may directly determine the life of our engine.

It is easy to produce carbon deposit, which indirectly reduces the dynamic performance of the car.

In addition, if the traffic jam is serious, the engine will stop working for a long time, the temperature of the combustion chamber will drop, and unburned hydrocarbons and paraffin will form carbon deposits and attach to the inner wall of the cylinder. If the oil is not good, the situation will be more serious.

Carbon deposition will increase fuel consumption and weaken power. Produce more carbon deposits, which indirectly reduces the dynamic performance and final service life of our cars.

The strengthening of the starter makes the number of start-stop times increase a lot.

For cars equipped with automatic start-stop system, considering that the number of starts is obviously much more, this hardware has also been strengthened, and the number of starts and stops can basically reach 300,000 to 600,000. So you really don't have to worry too much about the number of times you use it.

Summary:

The original intention of engine automatic start-stop technology design is to protect the environment and save energy, and it can really achieve this goal in theoretical environment. The automatic start-stop function can really save fuel without hurting the car, but it doesn't save money.

Generally speaking, the advantages of automatic start-stop are less than the disadvantages. If you want to be comfortable, pay more attention to the driving experience, and don't want to be disturbed by the noise and vibration when starting, you'd better turn it off.