Fuel economy analysis of part-load variable camshaft timing strategies in two modern small-capacity spark ignition engines
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- 作者：F. Bonatestaa ; fbonatesta@brookes.ac.uk" class="auth_mail" title="E-mail the corresponding author ; G. Altamorea ; J. Kalsia ; M. Caryb
- 关键词：Variable camshaft timing ; Variable valve timing ; Down-sized engine ; Cylinder charge dilution ; Direct injection ; Fuel economy
- 刊名：Applied Energy
- 出版年：2016
- 出版时间：15 February 2016
- 年：2016
- 卷：164
- 期：Complete
- 页码：475-491
- 全文大小：8369 K
文摘
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Valve timing strategies are explored at part-load in two small-capacity SI engines.
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Simplified graphical fuel-economy VCT strategies are provided for the two engines.
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Engine design specifics exert a profound influence upon optimal valve timing.
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The theoretical best strategy determines BSFC reduction above 8% for the PFI engine.
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Maximum BSFC reduction was about 5% for the more efficient GDI platform.