BENEFITS AND CHALLENGES OF VARIABLE COMPRESSION RATIO AT DIESEL ENGINES
The compression ratio strongly affects the working process and provides an exceptional degree of control over engine performance. In conventional internal combustion engines, the compression ratio is fixed and their performance is therefore a compromise between conflicting requirements. One fundamen...
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doaj-11d4e977d0904c19a9f7d0129969b4da2021-01-02T02:45:17ZengVINCA Institute of Nuclear SciencesThermal Science0354-98362010-01-0114410631073TSCI10041063PBENEFITS AND CHALLENGES OF VARIABLE COMPRESSION RATIO AT DIESEL ENGINESRadivoje B PešićSaša T MilojevićStevan P VeinovićThe compression ratio strongly affects the working process and provides an exceptional degree of control over engine performance. In conventional internal combustion engines, the compression ratio is fixed and their performance is therefore a compromise between conflicting requirements. One fundamental problem is that drive units in the vehicles must successfully operate at variable speeds and loads and in different ambient conditions. If a diesel engine has a fixed compression ratio, a minimal value must be chosen that can achieve a reliable self-ignition when starting the engine in cold start conditions. In diesel engines, variable compression ratio provides control of peak cylinder pressure, improves cold start ability and low load operation, enabling the multi-fuel capability, increase of fuel economy and reduction of emissions. This paper contains both theoretical and experimental investigation of the impact that automatic variable compression ratios has on working process parameters in experimental diesel engine. Alternative methods of implementing variable compression ratio are illustrated and critically examined.http://thermalscience.vinca.rs/2010/4/18diesel engineefficiencyemissionvariable compression ratioworking process |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Radivoje B Pešić Saša T Milojević Stevan P Veinović |
spellingShingle |
Radivoje B Pešić Saša T Milojević Stevan P Veinović BENEFITS AND CHALLENGES OF VARIABLE COMPRESSION RATIO AT DIESEL ENGINES Thermal Science diesel engine efficiency emission variable compression ratio working process |
author_facet |
Radivoje B Pešić Saša T Milojević Stevan P Veinović |
author_sort |
Radivoje B Pešić |
title |
BENEFITS AND CHALLENGES OF VARIABLE COMPRESSION RATIO AT DIESEL ENGINES |
title_short |
BENEFITS AND CHALLENGES OF VARIABLE COMPRESSION RATIO AT DIESEL ENGINES |
title_full |
BENEFITS AND CHALLENGES OF VARIABLE COMPRESSION RATIO AT DIESEL ENGINES |
title_fullStr |
BENEFITS AND CHALLENGES OF VARIABLE COMPRESSION RATIO AT DIESEL ENGINES |
title_full_unstemmed |
BENEFITS AND CHALLENGES OF VARIABLE COMPRESSION RATIO AT DIESEL ENGINES |
title_sort |
benefits and challenges of variable compression ratio at diesel engines |
publisher |
VINCA Institute of Nuclear Sciences |
series |
Thermal Science |
issn |
0354-9836 |
publishDate |
2010-01-01 |
description |
The compression ratio strongly affects the working process and provides an exceptional degree of control over engine performance. In conventional internal combustion engines, the compression ratio is fixed and their performance is therefore a compromise between conflicting requirements. One fundamental problem is that drive units in the vehicles must successfully operate at variable speeds and loads and in different ambient conditions. If a diesel engine has a fixed compression ratio, a minimal value must be chosen that can achieve a reliable self-ignition when starting the engine in cold start conditions. In diesel engines, variable compression ratio provides control of peak cylinder pressure, improves cold start ability and low load operation, enabling the multi-fuel capability, increase of fuel economy and reduction of emissions. This paper contains both theoretical and experimental investigation of the impact that automatic variable compression ratios has on working process parameters in experimental diesel engine. Alternative methods of implementing variable compression ratio are illustrated and critically examined. |
topic |
diesel engine efficiency emission variable compression ratio working process |
url |
http://thermalscience.vinca.rs/2010/4/18 |
work_keys_str_mv |
AT radivojebpesic benefitsandchallengesofvariablecompressionratioatdieselengines AT sasatmilojevic benefitsandchallengesofvariablecompressionratioatdieselengines AT stevanpveinovic benefitsandchallengesofvariablecompressionratioatdieselengines |
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1724361633003732992 |