Study of Intake Charge Control Method on TGDI Engine with CVVL System

  • Benzhong HanEmail author
  • Liguang Li
  • Ning Liu
  • Lihua Zhang
Conference paper
Part of the Lecture Notes in Electrical Engineering book series (LNEE, volume 486)


Intake air mass charge for TGDI engine with continuously variable valve lift system (CVVL system) can be controlled through CVVL system, or a combination in addition to conventional throttle valve and turbocharger. This paper presents the optimal charge control method and the application boundary conditions at different operating points by engine bench test on a TGDI engine with CVVL system. Test results show that lowest fuel consumption, relatively optimal emissions, and best performance can be realized simultaneously at best intake manifold pressure, which can be achieved via combination of different control methods: combination of intake valve lift and throttle valve at low to middle loads; only throttle valve at higher loads after maximum valve lift is reached; combination of turbocharger and throttle valve at high loads when intake pressure ratio, a dimensionless pressure ratio after and before throttle valve, lies between 0.95 and 1; only turbocharger after intake pressure ratio reaches 1.


CVVL system Charge control method Intake pressure ratio Best intake pressure 



Turbocharged gasoline direct injection


Variable valve timing


Continuously variable valve lift


Intake manifold pressure


Throttle opening angle


Intake valve lift


Brake specific fuel consumption


Brake mean effective pressure


The pressure ratio after and before throttle valve


Ignition advance angle


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Copyright information

© Springer Nature Singapore Pte Ltd. 2019

Authors and Affiliations

  • Benzhong Han
    • 1
    Email author
  • Liguang Li
    • 1
  • Ning Liu
    • 2
  • Lihua Zhang
    • 2
  1. 1.College of Automotive EngineeringTongji UniversityShanghaiChina
  2. 2.United Automotive Electronic Systems Co., Ltd.ShanghaiChina

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