Introduction Power performance power per liter of gasoline has reached 45-70kW/L,some even up to 90kW.Diesel engine is 27kW/L,up to 45.5kW. Economy:gasoline engine fuel consumption rate is 280g/kWh,diesel engine is as low as 180g/kWh. Reliability overhaul of 12000-15000h,some up to 20000h. Massic 1.36 kg/kW. (2)Supercharger technology is widely used. (3)The rapid development ofelectronic controltechnology. (4)More and more use of new materials. 机被与电子工程学聚 Automobile and Tractor Northwest A&F UniversityAutomobile and Tractor Northwest A&F University Introduction Power performance : power per liter of gasoline has reached 45-70kW/L, some even up to 90kW. Diesel engine is 27kW / L, up to 45.5kW. Economy : gasoline engine fuel consumption rate is 280g/kWh, diesel engine is as low as 180g/kWh. Reliability : overhaul of 12000-15000h,some up to 20000h. Massic : 1.36 kg/kW. (2) Supercharger technology is widely used. (3) The rapid development of electronic controltechnology. (4) More and more use of new materials