柴油机滞燃期的确定方法及试验验证

Determination Method of Combustion Delay Period of Diesel Engine and Experimental Verification

提出一种参数需求较少、利用实测气缸压力曲线确定柴油机滞燃期的简便方法——多变指数法,所获得的滞燃期值与其他传统方法的测算结果非常吻合,并一次对滞燃期的有关经验公式系数进行了实测标定,对滞燃期的变化规律作了较为深入的分析研究。

In order to determine the combustion delay period of diesel engine, a simple method--levity-index figure is proposed. This method features with few parameters and utilizes cylinder pressure curve measured. The value from this method is agreed with those obtained from other traditional methods. In addition, the method is used to calibrate the coefficients in experimental formula of combustion delay period. The variation principle of combustion delay period is analyzed and researched in depth.