OPTIMIZATION OF PILOT INJECTION PATTERN AND ITS EFFECT ON DIESEL COMBUSTION WITH HIGH-PRESSURE INJECTION

被引：11

作者：

NAKAKITA, K ^{[1
]}

KONDOH, T ^{[1
]}

OHSAWA, K ^{[1
]}

TAKAHASHI, T ^{[1
]}

WATANABE, S ^{[1
]}

机构：

[1] TOYOTA MOTOR CO LTD,HIGASHIFUJI TECH CTR,SUSONO,SHIZUOKA 41011,JAPAN

来源：

JSME INTERNATIONAL JOURNAL SERIES B-FLUIDS AND THERMAL ENGINEERING | 1994年 / 37卷 / 04期

关键词：

DIESEL ENGINE; FUEL INJECTION; COMBUSTION; HIGH-PRESSURE INJECTION; PILOT INJECTION;

D O I：

10.1299/jsmeb.37.966

中图分类号：

O414.1 [热力学];

学科分类号：

摘要：

The pilot injection pattern was optimized, and some effects of pilot injection on combustion and exhaust emissions were investigated using a single-cylinder DI diesel engine. The results are as follows. (1) In order to avoid the increase of smoke, both a small-hole-diameter nozzle and very accurate control of pilot injection quantity and pilot-main interval are essential. These improve the atomization of the pilot fuel and the air entrainment into the main spray. (2) With pilot injection, NOx is not reduced at the injection timing of TDC but is gradually reduced at more retarded injection timing. This is because the main combustion is accelerated at early injection timing but is decelerated at retarded injection timing, due to the promotion of ignition. (3) The effect of pilot injection on NOx reduction is generally small; however, pilot injection well prevents HC increase under light-load, injection-timing-retard conditions.

引用

页码：966 / 973

页数：8