International Journal of Automotive Technology

, Volume 19, Issue 5, pp 783–794 | Cite as

Effects of Injection Timing on Transient Performance of A Regulated Two-Stage Turbocharged Diesel Engine with Turbine Bypass Valve

  • Zhong Chang Liu
  • Xing Yuan
  • Jing TianEmail author
  • Yong Qiang Han
  • Kai Bo Yu
  • Peng Kun Teng


The object of this paper is to reduce soot emissions under typical 5s transient conditions of constant speed and increasing torque. And effects of fuel injection timing on combustion and emissions parameters were experimentally and numerically studied in a regulated two-stage turbocharged diesel engine with a turbine bypass valve (TBV). The test results indicated that: the smaller TBV opening could improve deterioration of smoke emissions and BSFC at medium and heavy loads. Afterward, the full-stage injection timing (FSIT) strategies (delaying injection timing during the entire transient process) could reduce soot and NOX emissions simultaneously. However, when TBV opening became larger, smoke emissions and BSFC were deteriorated gradually. Moreover, the sectional-stage injection timing (SSIT) strategies (advancing injection timing from 10 % load to a preset load and delaying injection timing from the preset load to 100 % load) could markedly reduce soot emissions by 75.8 % with TBV opening 20 %; the degradation of fuel consumption could be effectively suppressed. Finally, coupling the SSIT strategies with the TBV control strategies could significantly improve the transient performance.

Key words

Diesel engine Two-stage turbocharger Transient operation Full-stage injection timing Sectional-stage injection timing 



turbine bypass valve


original injection timing


full-stage injection timing


sectional-stage injection timing


electronic control unit


digital to analog converter


analog to digital converter


revolutions per minute


degrees of crank angle


brake specific fuel consumption


maximum cylinder pressure


crank angle location of 10 % mass burned


crank angle location of 50 % mass burned


air-fuel ratio


parts per million (by volume)


nitrogen oxides


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Copyright information

© The Korean Society of Automotive Engineers and Springer-Verlag GmbH Germany, part of Springer Nature 2018

Authors and Affiliations

  • Zhong Chang Liu
    • 1
  • Xing Yuan
    • 1
  • Jing Tian
    • 1
    Email author
  • Yong Qiang Han
    • 1
  • Kai Bo Yu
    • 1
  • Peng Kun Teng
    • 1
  1. 1.State Key Laboratory of Automotive Simulation and ControlJilin UniversityChangchunChina

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