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An Impulse Charging System for SI and Diesel Engines
Technical Paper
2002-01-1104
ISSN: 0148-7191, e-ISSN: 2688-3627
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English
Abstract
This paper describes the principles, effects and the potentials of impulse charging systems applied to SI and Diesel engines. In general, impulse charging is realized by closing the inlet port upstream of the inlet valve during the intake stroke with an additional switching device. The piston, moving towards bottom dead center, generates a vacuum inside the combustion chamber and inlet port. By opening the switching device abruptly, the sub-atmospheric pressure level induces an enhanced volumetric efficiency due to the significantly increased gas dynamic effects in the intake manifold.
One major advantage of impulse charging in comparison to the well known supercharging techniques lies in the dynamic behavior. The charging effect can be realized within one engine cycle. Furthermore, impulse charging provides high low-end torque, a nearly constant torque over a wide engine speed range with charging rates from 20% to 30%.
The requirements to realize an impulse charging device are high cross sections with minimized flow resistance, extremely fast opening and closing of the switching device, air tightness, and a good timing variability. Measurements performed on a SI engine equipped with an electromagnetic impulse charging device show indicated mean effective pressures higher than 1.4 MPa in an extended engine speed range with the charging effect being realized after one engine cycle.
Additional potentials with impulse charging can be expected by combining this technique with other supercharging systems especially a turbocharger and by using the impulse charger to control flow conditions and exhaust gas recirculation at part load.
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Kreuter, P., Heuser, P., Wensing, M., and Bey, R., "An Impulse Charging System for SI and Diesel Engines," SAE Technical Paper 2002-01-1104, 2002, https://doi.org/10.4271/2002-01-1104.Also In
References
- Kreuter P. Bey R. Wensing M. Impulslader für Otto- und Dieselmotoren, 22. Int. Wiener Motorensymp. Wien 2001
- Bäuerle M. Verfahren zum Erhöhen des Drehmoments eines Verbrennungsmotors, Offenlegungsschrift DE 198 46 111 A1 1998
- Bönisch H.-J. Brandl G. Noor S. Öhling K.-H. Riedl W. Theissen M. Wodiczka E. Schweiger E. Vorrichtung zum Steuern des Ladungswechsels bei Brennkraftmaschinen 1983
- Mitsuo H. Syunki O. Koji O. Junso S. Kazunori T. Intake system for internal combustion engines 1985
- Hiroshi K. Ansaugsystem für eine aufgeladene, ventilgesteuerte Brennkraftmaschine 1985
- Schatz O. Einlaßleitung eines Verbrennungsmotors 1989
- Manz P. Vorrichtung zur Verhinderung von Frischgas- Rückströmen im Ansaugkanal einer Brennkraftmaschine, Offenlegungsschrift DE 3741880 A1 1986
- Martin J. C. Reed Valve Assembly 1993