Recently, the mirror rate of diesel vehicles has increased frequently, but it is not satisfactory from the point of view of sales. Consumers do not catch cold on diesel vehicles. In this connection, the reporter interviewed a number of consumers who had plans to buy a car in the auto market and found that most consumers rated the diesel car as "the purchase of a diesel car is not at ease." Although they appreciate the diesel car, they have been reluctant to sell it. "I know that the diesel car is good, but it seems that there are so few kinds of it. It seems that there is no room for selection. After filling it up, there is no end in fueling, maintenance and repair." Mr. Zhang told reporters. In fact, diesel cars save 20% from gasoline vehicles of the same grade, and the greenhouse effect is 45% lower than that of normal gasoline when they are discharged. These advantages have been stir-fried by the media and manufacturers. No matter how to promote the benefits of diesel vehicles, in the eyes of consumers, diesel models have fewer models, the price is more expensive than the configuration of gasoline vehicles, and people lack understanding and psychological protection for after-sales services, driving skills and other aspects. As the passenger vehicle market is still dominated by gasoline vehicles, the structural principle of diesel vehicles is different from that of gasoline engines. There is no way to solve the problems of ordinary maintenance points. At the same time, consumers have limited knowledge of diesel engines and their associated parts. Buy it with confidence. Another Mr. Chen told reporters that he heard that the cylinder of a diesel car was ignited by high voltage instead of the electric spark of a petrol car. He did not understand this technology and was worried that his driving habits were not suitable for driving a diesel car. In the interview, the reporter also found that most consumers think that diesel cars are lower than gasoline cars. Due to the large power of diesel vehicles, which are particularly suitable for heavy tonnage vehicles, people think that only trucks burn diesel. At the same time, the reporter learned that a considerable number of consumers are skeptical about the environmental protection and energy saving of diesel vehicles. In addition, policy restrictions are also one of the concerns of consumers. Due to the smoking phenomenon of diesel vehicles, the government has for some time banned the use of diesel vehicles. This has caused some consumers to be skeptical. (International Finance Intern intern Wang Fan from Shanghai)
Reaming is a method of finishing a hole that has already been roughed.
Its primary purpose is to correct the deformation and tool marks remaining in the previous process and improve the accuracy of the hole. It is mainly used for trimming the bolt holes before the tight-fit bolts are assembled.
And the precision after reaming should generally reach the T9~T7 level, and should not be lower than the precision after lathe processing.
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