Studies on Direct-Injection Stratified-Charge Combustion in a Constant Volume Bomb (Effects of Local Premixing by Radial Fuel Injection)

Hiroyuki Kido, Kenshiro Nakashima, Hiroshi Tajima, Toshiaki Kitagawa, Shuwei Huang

Research output: Contribution to journalArticle

Abstract

The direct-injection stratified-charge engine has the advantages of higher thermal efficiency and less CO and NOx emission levels than conventional spark ignition engines. However, its actual utilization is prevented by high unburned hydrocarbon emission levels during light-load operations. In order to reduce the unburned hydrocarbon emissions, the effects of intensification of local premixing by radial fuel injection were examined experimentally using a pancake-type constant volume bomb. Unburned hydrocarbon emission levels by this “locally homogenized DISC system” with radial fuel injection were shown to be lower than those of tangential fuel injection cases. Moreover, the emission levels were discussed by comparing them with unburned hydrocarbon levels of premixed turbulent combustion.

Original languageEnglish
Pages (from-to)2949-2954
Number of pages6
JournalTransactions of the Japan Society of Mechanical Engineers Series B
Volume54
Issue number506
DOIs
Publication statusPublished - Jan 1 1988

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premixing
fuel injection
Fuel injection
Direct injection
Hydrocarbons
injection
hydrocarbons
Stratified charge engines
engines
spark ignition
turbulent combustion
Internal combustion engines
thermodynamic efficiency

All Science Journal Classification (ASJC) codes

  • Condensed Matter Physics
  • Mechanical Engineering

Cite this

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abstract = "The direct-injection stratified-charge engine has the advantages of higher thermal efficiency and less CO and NOx emission levels than conventional spark ignition engines. However, its actual utilization is prevented by high unburned hydrocarbon emission levels during light-load operations. In order to reduce the unburned hydrocarbon emissions, the effects of intensification of local premixing by radial fuel injection were examined experimentally using a pancake-type constant volume bomb. Unburned hydrocarbon emission levels by this “locally homogenized DISC system” with radial fuel injection were shown to be lower than those of tangential fuel injection cases. Moreover, the emission levels were discussed by comparing them with unburned hydrocarbon levels of premixed turbulent combustion.",
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AU - Tajima, Hiroshi

AU - Kitagawa, Toshiaki

AU - Huang, Shuwei

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