Technology Progress in High Efficiency Gasoline Engine for Vehicle
This paper disscusses the application of gasoline engine in vehicles and its potential in energy savingJBased on thermodynamic principle,the means of improving thermal efficiency in gasoline engine are identified,namely: raising the compression ratio,adopting the lean bum method,and decreasing the pumping loss.Meanwhile.it also includes improving constant volume ratio during combustion and decreasing coefficient of engine cycle variation.ln this paper,the energy saving technology on a port injection gasoline engine is presented,including raising compression ratio,WT,Mill cycle and cylinder deactivation.Then,the development and current application of gasoline direct injection (GDI) technology is reviewed.The advantages and disadvantages between lean-bum GDI and stoichiometric GDI are compared and discussed.Finally.the research progress of homogeneous charge compression ignition (HCCI) and homogeneous charge induced ignition (HCII) combustion on GDI engine is introducedStratified charge compression ignition and spark induced compression ignition (SICI),which derive from HCCI principle,can be utilized to extend HCCI operation range.
Automotive gasoline engineHigh efficiencyGasoline direct injectionHomogeneous charge compression ignition
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