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Diesel-engine cars: the new favorite of the future car market. Under the increasing environmental pressure and USA trade data aggregation servicesenergy crisis, diesel-engine cars are considered to be the new favorites of the future automobile market.It can not only meet the requirements of passengers for power, fuel consumption and comfort, but also reduce environmental pollution and dependence on imported oil. This article will analyze the current situation and future trend of diesel-engine cars from the three aspects of technology, market and policy. I. Technology: As an internal combustion engine, diesel engine has less emissions and higher fuel efficiency than gasoline engines. Due to the large density and high energy density of diesel, it can provide more power output. At the same time, diesel engines also excel in high torque output, which makes them perform better when climbing and overtaking. After years of development, technological breakthroughs have also significantly reduced the noise and vibration of diesel engines, and a series of advanced electronic technology auxiliary systems have been developed, such as variable geometry turbochargers and high-pressure injection systems, which make the fuel economy, power performance and emission control of diesel engines achieve A higher level.II. Market: At present, due to policies and other reasons, diesel vehicles occupy a relatively small share in the domestic market, but in mature markets such as Europe, diesel vehicles have become the mainstream. According to statistics, the sales of diesel vehicles in the EU market have exceeded that of gasoline vehicles, accounting for about 50% of the market share. The main reason is that diesel vehicles are more fuel-efficient, have lower average fuel consumption, and have low scarcity of diesel inventory, so they can get better prices in the market. However, in recent years, the market share of diesel vehicles has declined, on the one hand, because the emission standards of diesel engines have gradually increased, and the need to be equipped with exhaust gas post-treatment equipment to further purify emissions, resulting in an increase in vehicle costs; on the other hand, because some popular cities and tourist areas restrict the entry of diesel vehicles, consumers Diesel cars with unknown paths have doubts.III. Policy: The development of diesel vehicles is also affected by policies. Diesel vehicles are given greater support and preferential treatment in the legislation and tax policies of some countries. For example, some countries in Europe are exempt from vehicle purchase tax and fuel consumption tax, while in the United States and other regions, the government has taken measures such as restricting the purchase of diesel vehicles and raising pollution emission standards, which poses certain challenges to the development of diesel vehicles. At the same time, the Chinese government is also gradually promoting the development of diesel vehicles. At present, most diesel vehicles are still limited to specific purposes such as urban and road freight, but the gradual relaxation of policies will make diesel vehicles more widely used in the future. Based on the analysis of the above three aspects, diesel-engine cars, as an efficient and environmentally friendly type of car, have an increasingly broad development prospect. Of course, there are still some in the market and policies.Limitations, but this does not affect its future growth trend, which will promote the global automobile manufacturing industry to focus on research and development of technology, so that diesel-engine cars become one of the mainstreams of the future automobile market.

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