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Research Papers: Gas Turbines: Controls, Diagnostics, and Instrumentation

Nonlinear Compensators of Exhaust Gas Recirculation and Variable Geometry Turbocharger Systems using Air Path Models for a CRDI Diesel Engine

[+] Author and Article Information
Yeongseop Park

Department of Automotive Engineering,
Hanyang University,
222 Wangsimni-ro,
Seongdong-gu, Seoul 133-791, South Korea
e-mail: autopark@hanyang.ac.kr

Inseok Park

Automotive Control and Electronics Laboratory,
Department of Automotive Engineering,
Hanyang University,
222 Wangsimni-ro,
Seongdong-gu, Seoul 133-791, South Korea
e-mail: inseokpark@hanyang.ac.kr

Joowon Lee

Gasoline Engine Performance Test Team,
Research and Development Division,
Hyundai Motor Company,
772-1 Jangduk-Dong,
Hwaseong-Si, Gyeonggi-Do 445-706, South Korea
e-mail: joowon967@gmail.com

Kyunghan Min

e-mail: sturm@hanyang.ac.kr

Myoungho Sunwoo

e-mail: msunwoo@hanyang.ac.kr
Department of Automotive Engineering,
Hanyang University,
222 Wangsimni-ro,
Seongdong-gu, Seoul 133-791, South Korea

1Corresponding author.

Contributed by the Controls, Diagnostics and Instrumentation Committee of ASME for publication in the JOURNAL OF ENGINEERING FOR GAS TURBINES AND POWER. Manuscript received November 12, 2013; final manuscript received November 15, 2013; published online December 19, 2013. Editor: David Wisler.

J. Eng. Gas Turbines Power 136(4), 041602 (Dec 19, 2013) (12 pages) Paper No: GTP-13-1410; doi: 10.1115/1.4026075 History: Received November 12, 2013; Revised November 15, 2013

This paper investigates the design of model-based feedforward compensators for exhaust gas recirculation (EGR) and variable geometry turbocharger (VGT) systems using air path models for a common-rail direct injection (CRDI) diesel engine to cope with the nonlinear control problem. The model-based feedforward compensators generate set-positions of the EGR valve and the VGT vane to track the desired mass air flow (MAF) and manifold absolute pressure (MAP) with consideration of the current engine operating conditions. In the best case, the rising time to reach 90% of the MAF set-point was reduced by 69.8% compared with the look-up table based feedforward compensators.

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References

Figures

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Fig. 1

Diagram of the target engine air system

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Fig. 2

Block diagram of the nonlinear air path model

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Fig. 3

Structure of the nonlinear compensator of the EGR path

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Fig. 4

Structure of the nonlinear compensator for the VGT path

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Fig. 5

In-house EMS hardware platform

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Fig. 6

Steady-state model validation results through engine experiment

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Fig. 7

Experimental results of the dynamic correction for temperature models

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Fig. 8

Experimental results of the engine load step change

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Fig. 9

Details of the model-based feedforward compensators during the step change of the fuel injection rate

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Fig. 10

Experimental results of the engine load step change (details of the MAF and MAP control results)

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Fig. 11

Time to reach 90% (t90%) of the variation in step change

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Fig. 12

Experimental results of the MAF set-point step change

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Fig. 13

Details of the model-based feedforward compensators during the step change of the MAF set-point

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