The low pressure condition on the plateau leads to the decline of diesel combustion performance,which leads to the lack power performance of diesel engine.The operation performance of diesel engine in plateau environment can be improved without changing the structure of diesel engine by adding oxygen-containing components such as alcohols,ethers and esters in diesel oil.The combustion characteristics,power performance and economy of the above oxygen-containing diesel fuel in diesel engine are compared.It is found that in the plateau environment,alcohol-containing diesel will prolong the ignition delay period of the engine,and the lower the carbon number of fatty alcohols,the more serious the impact.Ethers-containing diesel shortens ignition delay,but its calorific value is lower.The ester-containing diesel oil shows a high freezing point,so it is difficult to be used in the low temperature environment on the plateau.Hybrid oxygen-containing diesel may cover the advantages of oxygen-containing diesel fuels.It is suggested that the novel oxygen-containing diesel fuel for plateau environment shall focus on polyether,short-chain esters and a small amount of long-chain alcohol hybrid components.
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