According to statistics, last year China consumed a total of 160 million tons of diesel, of which at least 60% was consumed by the engine, nearly 100 million tons. Research shows that by 2020, the total number of motor vehicles in China will reach 190 million, which will consume 360 ​​million tons of vehicle fuel and emit 1.17 billion tons of CO2. The national "Twelfth Five-Year Plan" regards the development of new energy technologies as a development strategy for the next five years.
Emissions and fuel consumption are widely regarded as the main driving force for the progress of today's engine technology. Control of future carbon dioxide emissions will become a more important driving force. According to the McKinsey report, the progress of traditional engines and the development of new power systems can effectively reduce the global automotive carbon dioxide emissions. Half of the potential for emission reduction comes from the more fuel-efficient use of fuel in internal combustion engines. For a long time, people have devoted great efforts to research and improvement of the engine. For example, the use of booster technology and increased compression ratio to compensate for the loss of power caused by the reduction of displacement, widely used overhead cams, multi-valve, gasoline injection, stratification Technologies such as gas supply, lean burn, and electronic control are used to improve the engine's technical level and reduce fuel consumption.
Therefore, the key to overcome the engine energy-saving technology will bring about a multiplier effect for the vehicle's energy-saving and emission reduction. For the truck industry, in the aspect of energy conservation and emission reduction, it is imperative that neither electric vehicles nor hybrid vehicles be produced. The current optimal choice is to develop a more fuel-efficient conventional diesel vehicle.
According to statistics, the potential of automobile emission reduction is about 1/4 depending on new powertrain technologies, such as the development of hybrid, plug-in hybrid or electric vehicle technologies. The research results of the American Academy of Sciences also show that in terms of urban freight vehicles and buses, the development of hybrid power technology has the largest contribution to the energy conservation of entire vehicles, which is in line with the current domestic urban public transport Daxing hybrid vehicles; and for intercity buses, Hybrid technology has little contribution to vehicle energy efficiency, and it is also true for heavy-duty trailers. Therefore, the manufacturers of the above two vehicles should focus on energy-saving engine development.
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