汽车工程

汽车工程 ›› 2019, Vol. 41 ›› Issue (5): 508-513.doi: 10.19562/j.chinasae.qcgc.2019.05.005

• • 上一篇    下一篇

高压共轨系统不同温度下喷油参数修正计算*

王军1, 张幽彤2, 金毅1, 韩树1   

  1. 1.陆军装甲兵学院车辆工程系,北京 100072;
    2.北京理工大学机械与车辆学院,北京 100081
  • 收稿日期:2018-05-11 发布日期:2019-06-05
  • 通讯作者: 王军,副教授,博士,E-mail:joe4126@163.com
  • 基金资助:
    国家自然科学基金(51305457)资助

Calculation Correction of Fuel Injection Parameters at Different FuelTemperatures of High Pressure Common Rail System

Wang Jun1, Zhang Youtong2, Jin Yi1, Han Shu1   

  1. 1.Department of Vehicle Engineering, Academy of Army Armored Force, Beijing 100072;
    2.School of Mechanical Engineering, Beijing Institute of Technology, Beijing 100081
  • Received:2018-05-11 Published:2019-06-05

PDF (PC)

928

赞

摘要： 为说明高压共轨系统燃油温度变化对喷油量的影响,进行了不同燃油温度下的喷油参数修正计算。首先简要分析了高压共轨系统燃油流动传热特征,依据柴油机工作环境温度范围,提出了确定基准温度的方法,然后运用流体传热计算方法,推导出了喷油量和喷油压力的修正量计算公式;最后结合实例,给出了基准温度下的喷油压力和喷油量的基准脉谱,计算了不同温度下燃油喷油压力和喷油量的修正脉谱;结果表明:50 ℃燃油温度的喷油量修正量计算值与测试值的相对误差在14%以下,80 ℃燃油温度的喷油量修正量计算值与预测值的相对误差在9%以下,说明喷油参数修正计算方法是有效的。

关键词: 动力机械及工程, 喷油量, 高压共轨, 温度

Abstract: In order to demonstrate the influence of fuel temperature variation on fuel injection quantity of high pressure common rail system (HPCR), the calculation correction of fuel injection parameters at different temperatures is conducted. Firstly, based on a brief analysis of the characteristic of fuel flow and heat transfer of the HPCR system and according to the working temperature range of diesel engine, a method to determine the reference temperature is put forward. Then, the formula for calculating the corrected quantity of fuel injection quantity and injection pressure is provided by using the method of fluid heat transfer calculation. Finally, combined with real cases, basic MAP of fuel injection pressure and injection quantity under basic temperature is given and corrected MAP of fuel injection pressure and injection quantity is calculated. The results show that the relative error between the calculation and measurement value of fuel injection correction at 50 ℃ is less than 14%, and that between the calculated value and the predicted value at 80 ℃ is less than 9%, which shows the calculation method of fuel injection parameter correction is effective.

Key words: power machinery and engineering, fuel injection quantity, high pressure common rail, temperature