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Comparison of Turbocharging and Pressure Wave Supercharging of a Natural Gas Engine for Light Commercial Trucks and Vans

Author

Listed:
  • Norbert Zsiga

    (Automotive Powertrain Technologies Laboratory, Empa Swiss Federal Laboratories for Materials Science and Technology, 8600 Dübendorf, Switzerland)

  • Mario A. Skopil

    (Antrova AG, Hofwisenstrasse 13, 8260 Stein am Rhein, Switzerland)

  • Moyu Wang

    (Automotive Powertrain Technologies Laboratory, Empa Swiss Federal Laboratories for Materials Science and Technology, 8600 Dübendorf, Switzerland)

  • Daniel Klein

    (FPT Motorenforschung AG, Schlossgasse 2, 9320 Arbon, Switzerland)

  • Patrik Soltic

    (Automotive Powertrain Technologies Laboratory, Empa Swiss Federal Laboratories for Materials Science and Technology, 8600 Dübendorf, Switzerland)

Abstract

To increase the efficiency of a natural gas engine, the use of a Miller camshaft was analysed. To avoid a decline in the low-end torque and also in the transient response, a pressure wave supercharger (Comprex™) was compared to the conventional single-stage turbocharger. The analyses for this conceptual comparison were performed experimentally, and the data were then used to run simulations of driving cycles for light commercial vehicles. A torque increase of 49% resulted at 1250 rpm when the Comprex™ was used in combination with a Miller camshaft. Despite the Miller camshaft, the Comprex™ transient response was still faster than the turbocharged engine. Using the same camshaft, the turbocharged engine took 2.5-times as long to reach the same torque. Water injection was used to increase the peak power output while respecting the temperature limitations. As the Comprex™ enables engine braking by design, we show that the use of friction brakes was reduced by two-thirds. Finally, a six-times faster catalyst warmup and an up to 90 ° C higher exhaust gas temperature at the three-way catalytic converter added to the benefits of using the Comprex™ supercharger. The known drawbacks of the Comprex™ superchargers were solved due to a complete redesign of the machine, which is described in detail.

Suggested Citation

  • Norbert Zsiga & Mario A. Skopil & Moyu Wang & Daniel Klein & Patrik Soltic, 2021. "Comparison of Turbocharging and Pressure Wave Supercharging of a Natural Gas Engine for Light Commercial Trucks and Vans," Energies, MDPI, vol. 14(17), pages 1-24, August.
    • Handle: RePEc:gam:jeners:v:14:y:2021:i:17:p:5306-:d:622887
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    References listed on IDEAS

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    1. Shim, Euijoon & Park, Hyunwook & Bae, Choongsik, 2018. "Intake air strategy for low HC and CO emissions in dual-fuel (CNG-diesel) premixed charge compression ignition engine," Applied Energy, Elsevier, vol. 225(C), pages 1068-1077.
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    Cited by:

    1. Shining Chan & Yeyu Chen & Fei Xing & Huoxing Liu, 2022. "Effect of Stagger Angle of Rotor Channels on the Wave Rotor," Energies, MDPI, vol. 15(24), pages 1-20, December.

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