Studies on an accumulation-type fuel injection system (effects on combustion characteristics)

Yutaro Wakuri, Koji Takasaki, Yanxiang Yang, Satoshi Yoshida

Research output: Contribution to journalArticle

Abstract

In the present studies, a new accumulation-type fuel injection system was developed to control the injection pressure independently of engine speed. The injection characteristics and the effects of the system on combustion characteristics represented by exhaust smoke density, specific fuel consumption and rate of heat release, in a small-sized direct-injection type diesel engine were investigated and the following was made clear : (1) Making use of the new injection system, exhaust smoke density was fairly decreased even at low engine speeds. (2) It was effective on the improvement of combustion characteristics to use the injection nozzle with smaller hole diameter corresponding to higher injection pressure, because of the increase in excess air ratio of fuel spray. (3) Increase of injection pressure made combustion characteristics insensitive to swirl intensity and improved specific fuel consumption, especially at retarded injection timing. (4)The shape of injection rate versus crank angle is important to reduce exhaust smoke density without a serious increase in maximum combustion pressure.

Original languageEnglish
Pages (from-to)211-216
Number of pages6
JournalTransactions of the Japan Society of Mechanical Engineers Series B
Volume54
Issue number497
DOIs
Publication statusPublished - Jan 1 1988

Fingerprint

fuel injection
Fuel injection
Smoke
injection
Fuel consumption
smoke
Engines
fuel consumption
Direct injection
Density (specific gravity)
Diesel engines
Nozzles
engines
exhaust systems
fuel sprays
diesel engines
Air
eccentrics
nozzles
time measurement

All Science Journal Classification (ASJC) codes

  • Condensed Matter Physics
  • Mechanical Engineering

Cite this

Studies on an accumulation-type fuel injection system (effects on combustion characteristics). / Wakuri, Yutaro; Takasaki, Koji; Yang, Yanxiang; Yoshida, Satoshi.

In: Transactions of the Japan Society of Mechanical Engineers Series B, Vol. 54, No. 497, 01.01.1988, p. 211-216.

Research output: Contribution to journalArticle

Wakuri, Yutaro ; Takasaki, Koji ; Yang, Yanxiang ; Yoshida, Satoshi. / Studies on an accumulation-type fuel injection system (effects on combustion characteristics). In: Transactions of the Japan Society of Mechanical Engineers Series B. 1988 ; Vol. 54, No. 497. pp. 211-216.
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