The influence of blow-by on indicated work output from a diesel engine under cold start conditions

被引：16

作者：

Cheng, KY

Shayler, PJ ^{[1
]}

Murphy, M

机构：

[1] Univ Nottingham, Mech Engn Sch MMME, Nottingham NG7 2RD, England

[2] Ford Motor Co Ltd, Laindon, Essex, England

来源：

PROCEEDINGS OF THE INSTITUTION OF MECHANICAL ENGINEERS PART D-JOURNAL OF AUTOMOBILE ENGINEERING | 2004年 / 218卷 / D3期

关键词：

cold start; blow-by; indicated mean effective pressure; heat release; combustion; piston ring; blow-by area and trapped mass; blow-by measurement; mass airflow sensor;

D O I：

10.1243/095440704322955858

中图分类号：

TH [机械、仪表工业];

学科分类号：

0802 ;

摘要：

The start-up time of automotive, light-duty diesel engines increases as ambient temperature falls. One contributory cause is a reduction in indicated work output. The influence of blow-by in bringing about the reduction has been investigated. The experimental study was carried out at -20 degreesC on four-cylinder direct injection (DI) engines with a capacity of around 21. Blow-by losses were inferred from measurements of gas flow from the crankcase. Indicated mean effective pressure was shown to decrease linearly with increasing blow-by rate. The relationship accounts for almost all the reduction in work output at low temperatures. The reduction is associated with the influence of blow-by on heat released during combustion, rather than with the transport of enthalpy from the cylinder.

引用

页码：333 / 340

页数：8