发动机辅助制动模拟研究

Research on Engine Auxiliary Braking Simulation

文章首先研究了分析了发动机辅助制动技术和工作原理,然后又根据实际情况列出了模拟的发动机制动仿真设计。在单因素和多因素参数的基础上分析了发动机辅助制动模型,主要是选择排气门开度、发动机转速和排气背压几个方面展开的模型分析。分析结果表明,这些因素都会受到发动机转速的变化而变化,发动机转速在增加的时候就会加大气缸内的压力,从而使峰值接近最大值;同时发动机转速也会影响制动力,在发动机转速增加的时候也会增加制动力,同时制动力减少会降低制动力矩;发动机转速在恒定的情况下,制动力矩会受制动力矩的影响而变化。制动力矩和减速制动会受到排气门开度值的增加而变大。排气门开度值在增加的时候会增加排气背压,会引起制动力矩变大。

This paper first studied and analyzed the engine auxiliary braking technology and working principle, and then listed the simulated engine braking simulation design according to the actual situation. On the basis of single factor and multi-factor parameters, the engine auxiliary braking model is analyzed, which mainly includes the selection of exhaust valve opening, engine speed and exhaust back pressure. Analysis results show that these factors are subject to changes in engine speed, engine speed will increase the pressure in the cylinder, so that the peak value is close to the maximum;At the same time, the engine speed will also affect the braking force. When the engine speed increases, the braking force will also be increased. At the same time, the braking torque will be reduced when the braking force decreases. Braking torque and braking deceleration will be increased by the increase of exhaust valve opening value. When the exhaust valve opening value increases, the exhaust back pressure will be increased, which will cause greater braking torque.