Development and Research of High Efficiency Hybrid Dedicated Gasoline Engine
An efficient hybrid gasoline engine adopts the Atkinson cycle,which avoids the drawbacks of the Atkinson cycle through a combination of hybrid operation.At the same time,a normal engine usually has a com-pression ratio of around 8-11,which has a significant impact on engine performance.An increase in compression ratio can lead to an increase in cylinder temperature,thereby increasing the engine's combustion efficiency,im-proving the engine's power output,and reducing antifreeze fuel consumption.In order to avoid detonation,an ex-ternal EGR is also used to separate a portion of the exhaust gas from the exhaust pipe.After being cooled by an intercooler,it is reintroduced into the intake duct to mix with fresh gas and enter the cylinder for combustion.EGR can effectively reduce combustion temperature,reduce heat load in the cylinder,and suppress detonation.By combining a high compression ratio engine with an external EGR,it can increase charging,reduce partial load pump air loss,lower combustion temperature,reduce detonation tendency,and improve combustion efficiency.
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