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Transient response of a Turbocharged SI Engine with an electrical boost pressure supply
Technical Paper
2003-01-1844
ISSN: 0148-7191, e-ISSN: 2688-3627
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English
Abstract
This paper deals with the transient response of a highly turbocharged gasoline engine. This downsized engine should behave as a naturally aspirated engine when the throttle is suddenly opened. However, a turbo lag occurs and this phenomenon is of large importance for the vehicle acceleration and driver sensations. To reduce turbo lag effects, an electrical compressor (E-booster) was used to improve the main compressor and engine responses.
The study was led on a three cylinder 1L turbo-charged engine.
1-D simulations (WAVE code) with a MATLAB-SIMULINK coupling were used to calculate the engine and vehicle transient responses. The vehicle, turbocharger and E-booster characteristics were simulated by the model. Second to third gear wide open throttle accelerations, varying engine loads at constant speed were also simulated.
The calculations give important results like E-booster electrical consumption, and focus on the most significant parameters.
By increasing the mass flow in the main compressor, the electrical booster largely improves the engine response. Large gains were obtained during the acceleration: the electrical booster reduces the response time from 3s to 1s.
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Citation
Lefebvre, A. and Guilain, S., "Transient response of a Turbocharged SI Engine with an electrical boost pressure supply," SAE Technical Paper 2003-01-1844, 2003, https://doi.org/10.4271/2003-01-1844.Also In
References
- HEYWOOD, J. B. Internal Combustion Engine Fundamentals Mc Graw-Hill, Inc. 1988
- WATSON, N. JANOTA, M. S. Turbocharging the internal combustion engine Wiley-Interscience 1982
- MATTARELLI E VALENTINI A Simulation of a high performance turbo-charged SI engine SAE 983048
- DUNN M E WHITFIELD S STOKES J OSBORNE R J Engine downsizing - a fundamental approach to vehicle fuel economy Haus der Technik conference on downsizing Munich 2000