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

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

Abstract

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.

Keywords

CVVL system Charge control method Intake pressure ratio Best intake pressure 

Nomenclature

TGDI

Turbocharged gasoline direct injection

VVT

Variable valve timing

CVVL

Continuously variable valve lift

Psr

Intake manifold pressure

TOA

Throttle opening angle

IL

Intake valve lift

BSFC

Brake specific fuel consumption

BMEP

Brake mean effective pressure

Rip

The pressure ratio after and before throttle valve

ZWOUT

Ignition advance angle

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Copyright information

© Springer Nature Singapore Pte Ltd. 2019

Authors and Affiliations

  • Benzhong Han
    • 1
  • 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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