期刊论文

中文

计算机仿真

1006-9348

2015

32

5

284-289

10.3969/j.issn.1006-9348.2015.05.063

中南林业科技大学研究生科技创新基金资助项目（CX2013B19） 湖南省研究生科研创新资助项目（CX2013B363） 湖南省自然科学基金重点资助项目（13JJ8001）

本校为第一机构

柴油机两级涡轮增压技术优化,是为改进内燃机低速扭矩和瞬态响应特性,提升燃油经济性。对某车用重型柴油机进行两级可调涡轮增压系统的匹配研究,采用GT-power软件建立了两级可调增压系统的计算模型,并利用台架试验数据校准了原机模型;进一步以增压压力为目标控制参数,采用软件中的PID模块分段控制废气旁通阀开度,合理分配高低级增压比,并对柴油机外特性稳定工况进行计算。研究结果表明,匹配后的发动机低速扭矩达到目标,高速比油耗降低。改进方法能在实际工程运用中为发动机增压系统的匹配提供选择。

Two-stage turbocharging technology is an important way to increase the internal combustion engine torque and improve the transient response characteristics at low speed, also improves the economy. A matching method of regulated two-stage turbocharging system for a vehicle heavy-duty diesel engine was studied. Using GT-powcr software, a regulated two-stage turbocharging system was built and the original engine was calibrated with the experiment data. Based on the model, this paper used PID module of the software to control the opening of by-pass valve step by step, aiming at boosting pressure a...