To optimize the fuel and air mixing process and improve the utilization rate of air in highly-intensified single-cylin-der diesel engine,the re-entrant combustion chambers with step-typed lip and tilted lip were designed,and the influence law of throat diameter on combustion process was acquired by the experiment.By using the step-typed lip combustion chamber with a thoat diameter of 72 mm,the target of 2.6 MPa BMEP could be achieved under the excess air coefficient of 1.5～1.7,which had the characteristics of low fuel consumption,exhaust temperature and smoke and short combustion duration.The re-entrant combustion chamber with tilted lip presented lower fuel consumption,exhaust temperature and peak combustion pressure,fas-ter heat release rate and shorter comustion duration than the counterpart with step lip under the same BMEP.
维普
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