EFFECTS OF CYLINDER TEMPERATURE AND PRESSURE ON IGNITION DELAY IN DIRECT INJECTION DIESEL ENGINE

The purpose of this study is to investigate the effects of the mean cylinder temperature and pressure, from the start of injection to ignition, on the ignition delay period in a direct injection diesel engine, and to clarify the difference in the ignition delay period between the engine and a constant volume bomb. The ignition delay period in the engine was measured by changing factors such as injection timing, engine speed, swirl ratio, injection quantity, nozzle opening pressure, nozzle hole diameter and piston cavity shape. The cylinder temperature was measured by a fine thermocouple with a compensation circuit under the motored condition. A single shot injection was adopted to reduce the residual gas from a previous cycle. Results show that the ignition delay period in the engine can be controlled by the cylinder temperature and pressure, that the engine shows shorter ignition delay than the constant volume bomb, and that the difference in ignition delay between them is mainly due to the existence of the piston cavity wall on which the fuel spray impinges.

Availability:
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Supplemental Notes:
- Journal article
Authors:
- Kwon, S
- Masataka, A
- HIROYASU, H
Publication Date: 1990

Media Info

Features: References;
Pagination: 13 p.
Serial:
- Bulletin of the Marine Engineering Society in Japan
- Volume: 18
- Issue Number: No.1
- ISSN: 0388-0079

Subject/Index Terms

TRT Terms: Combustion; Diesel engines; Engine cylinders; Fuel injection; Fuel injectors; Ignition; Pressure; Temperature; Traffic delays
Old TRIS Terms: Direct injection
Subject Areas: Marine Transportation; Operations and Traffic Management; Vehicles and Equipment;

Filing Info

Accession Number: 00659974
Record Type: Publication
Source Agency: Maritime Technical Information Facility
Files: TRIS
Created Date: Jul 21 1994 12:00AM