Study on an opposed-injection stratified-charge combustion system

Toshiaki Kitagawa, Hiroyuki Kido, Hiroyuki Ishida

Research output: Chapter in Book/Report/Conference proceedingConference contribution

1 Citation (Scopus)


The direct-injection stratified-charge engine is expected to be an alternative to the conventional spark-ignition engines for its high thermal efficiency and low CO and NOx emission levels. Its actual utilization, however, is prevented by high unburned hydrocarbon emission levels especially during light-load operations. In order to conquer this problem, an opposed-injection stratified-charge system was examined using a pancake-type constant volume bomb, where fuel was injected nearly towards the center of the bomb by a pair of fuel injectors attached oppositely to the circumferential wall of the bomb. Unburned hydrocarbons were reduced compared with the basic radial fuel injection stratified-charge system with a single injector. It was considered that the interactions of the two fuel jets promoted the local fuel-air mixing and increased the flame propagation velocity leaving less over-lean mixture.

Original languageEnglish
Title of host publicationASME/JSME Thermal Engineering Joint Conference
PublisherPubl by ASME
Number of pages6
ISBN (Print)0791806162
Publication statusPublished - 1991
EventProceedings of the 3rd ASME/JSME Thermal Engineering Joint Conference Part 5 (of 5) - Reno, NV, USA
Duration: Mar 17 1991Mar 22 1991

Publication series

NameASME/JSME Thermal Engineering Joint Conference


OtherProceedings of the 3rd ASME/JSME Thermal Engineering Joint Conference Part 5 (of 5)
CityReno, NV, USA

All Science Journal Classification (ASJC) codes

  • Engineering(all)


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