An Impulse Charging System for SI and Diesel Engines Meta Motoren- und Energie-Technik GmbH

Format:

Conference/Event

Author/Creator:

Kreuter, Peter, author.

Conference Name:

SAE 2002 World Congress & Exhibition (2002-03-04 : Detroit, Michigan, United States)

Language:

English

Physical Description:

1 online resource

Place of Publication:

Warrendale, PA SAE International 2002

Summary:

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 portrait 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

Notes:

Vendor supplied data

Publisher Number:

2002-01-1104

Access Restriction:

Restricted for use by site license