Low-Speed Performance Improvement of Natural Gas Engine by Asynchronous Intake Timing and Turbocharger Matching

doi:10.7652/xjtuxb201909008

您当前的位置：

首页 >

文章列表页 >

Low-Speed Performance Improvement of Natural Gas Engine by Asynchronous Intake Timing and Turbocharger Matching

更新时间：2025-07-09

- Low-Speed Performance Improvement of Natural Gas Engine by Asynchronous Intake Timing and Turbocharger Matching
- Vol. 53, Issue 9, Pages: 55-60+78(2019)
- 作者机构：
  
  西安交通大学能源与动力工程学院,西安,710049
- 作者简介：
- 基金信息：
- DOI：10.7652/xjtuxb201909008
  CLC： TK474
- Online First：10 September 2019，
  
  Published：2019
- 稿件说明：
移动端阅览
Low-Speed Performance Improvement of Natural Gas Engine by Asynchronous Intake Timing and Turbocharger Matching[J]. 2019, 53(9): 55-60+78.
DOI：

Low-Speed Performance Improvement of Natural Gas Engine by Asynchronous Intake Timing and Turbocharger Matching[J]. 2019, 53(9): 55-60+78. DOI： 10.7652/xjtuxb201909008.

摘要

为了提升由增压汽油机改造的天然气发动机的低速性能

设计了同步进气和非同步进气结合增压器匹配的优化方案

并通过台架试验和数值模拟的方法研究了各方案对天然气发动机性能的影响。天然气发动机匹配比原汽油机小的增压器显著提高了低速时的增压比

进而增加了进气流量。采用比原汽油机进气持续角和进气迟闭角小的同步进气方案

减小了发动机低速时的进气末期回流

使得低速时进气流量显著增加; 在此基础上

采用非同步进气方案

其中一个进气门的进气持续角进一步减小

导致低速时进气流量进一步增加

相对原机方案进气流量最大增加了46%

而另一个进气门进气持续角和进气迟闭角较大

保证了高速时可充分进气。采用非同步进气方案时缸内流动状况得到改善

最大燃烧放热率显著增加

燃烧持续期略有缩短。天然气发动机的性能经过优化后

相比原汽油机

低速扭矩最大提高了55.6%

经济性也有所改善

低速燃气消耗率最大降低了8.1%。

Abstract

Optimi-ation schemes of synchronous and asynchronous intake timing combined with turbocharger matching are designed to improve the low-speed performance of a natural gas engine modified from a turbocharged gasoline engine.Then bench test and numerical simulation are used to investigate the effects of different intake optimi-ation schemes on the performance of the natural gas engine.It is found that the boost pressure and the intake flow rate of the natural gas engine at low speeds increase obviously by matching a turbocharger smaller than that of the original gasoline engine.The backflow at the end of intake stroke is reduced at low speeds when adopting the synchronous intake timing scheme with a smaller intake duration angle and delayed closing angle

which results in an obvious increase in the intake flow rate at low speeds.When adopting asynchronous intake timing scheme

the further decreased intake duration angle of one intake valve may lead to a further increase of 46% in the inta

关键词

Keywords

references

JAHIRUL M I, MASJUKI H H, SAIDUR R, et al.Comparative engine performance and emission analysis of CNG and gasoline in a retrofitted car engine [J].Applied Thermal Engineering, 2010, 30(14/15): 2219-2226.

WANG H X, FANG H, YU X Y, et al.Development of natural gas vehicles in China: an assessment of enabling factors and barriers [J].Energy Policy, 2015, 85: 80-93.

CHO H M, HE B Q.Spark ignition natural gas engines: a review [J].Energy Conversion and Management, 2007, 48(2): 608-618.

刘廷, 韩志玉, 黄勇成, 等.车用天然气发动机增压匹配及性能参数优化 [J].车用发动机, 2016(4): 75-81.

LIU Ting, HAN Zhiyu, HUANG Yongcheng, et al.Turbocharging matching and performance parameter optimization of vehicle natural gas engine [J].Vehicle Engine, 2016(4): 75-81.

陆金华, 陈小波.基于GT-POWER汽油机低速扭矩优化分析 [J].装备制造技术, 2015(8): 4-7.

LU Jinhua, CHEN Xiaobo.Optimization analysis of low speed torque based on GT-POWER gasoline engine [J].Equipment Manufacturing Technology, 2015(8): 4-7.

吴滴.增压天然气发动机进气补气改善动力性的试验研究 [D].长沙: 湖南大学, 2016: 107.

刘凯敏, 杨靖, 邓帮林, 等.非同步气门正时对高速汽油机进气及燃烧过程的影响 [J].内燃机工程, 2016, 37(2): 94-100.

LIU Kaimin, YANG Jing, DENG Banglin, et al.Effect of asynchronous valve timing on intake and combustion process of a high speed gasoline engine [J].Chinese Internal Combustion Engine Engineering, 2016, 37(2): 94-100.

WU Z K, HAN Z Y.Numerical investigation on mixture formation in a turbocharged port-injection natural gas engine using multiple cycle simulation [J].Journal of Engineering for Gas Turbines and Power, 2018, 140(5): 051704.

LEE K, BAE C, KANG K.The effects of tumble and swirl flows on flame propagation in a four-valve S.I.engine [J].Applied Thermal Engineering, 2007, 27(11/12): 2122-2130.

DENG B L, YANG J, ZHANG D M, et al.The challenges and strategies of butanol application in conventional engines: the sensitivity study of ignition and valve timing [J].Applied Energy, 2013, 108: 248-260.

MOMENI MOVAHED M, BASIRAT TABRIZI H, MIRSALIM M.Experimental investigation of the concomitant injection of gasoline and CNG in a turbocharged spark ignition engine [J].Energy Conversion and Management, 2014, 80: 126-136.

ZHAO J X, XU M.Fuel economy optimization of an Atkinson cycle engine using genetic algorithm [J].Applied Energy, 2013, 105: 335-348.

ZHAO J X, XU M, LI M, et al.Design and optimization of an Atkinson cycle engine with the artificial neural network method [J].Applied Energy, 2012, 92: 492-502.

Views

下载量

CSCD

Alert me when the article has been cited

提交

Tools

Publicity Resources

Numerical Simulation of Combustion Process in a Spark-Ignition Engine Fuelled with Natural Gas-Hydrogen Blends Combined with Exhaust Gas Recirculation

Effect of Adding Oxygenated Fuel on Particles Emissions of Pilot-Ignited Natural Gas Engine

Effects of Hydrogen-Rich Reformed Gas on the Combustion Reaction Process in a Natural Gas Engine

Influence of Injection Strategy on Combustion and Emissions of Multi-point Injection Natural Gas Engine

Multi-Scale Analysis of Combustion Instability in Natural Gas Engine

Related Author

刘兵

黄佐华

王婕

曾科 1

刘亦夫 1

郑瑜 1

宁小康 1

Related Institution

State Key Laboratory of Multiphase Flow in Power Engineering, Xi'an Jiaotong University

Powertrain Research Institute, Gealy Automotive Co. Ltd.

School of Energy and Power Engineering, Wuhan University of Technology

College of Power and Energy Engineering, Harbin Engineering University

School of Mechanical and Power Engineering, Zhengzhou University

⁰