Combustion and emissions of low heat rejection ceramic methanol ATAC engines

Norimasa Iida, Shinji Hosonuma, Ken'ichi Yoshimura, Shigehisa Takase

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

When methanol is used as fuel for internal combustion engines, formaldehyde and unburned methanol emissions can be a problem. To overcome this shortcoming, an engine with the active thermo-atmosphere combustion (ATAC) system was proposed, along with improvements in heat-insulating performance and the realization of high-temperature combustion by using ceramics for the combustion chamber walls. The combustion and emissions characteristics of this ceramic low heat rejection (LHR) methanol ATAC engine were investigated. Combustion performance was compared between operation with methanol and gasoline. When methanol was used, it was seen that the ATAC operation region was widened considerably. Also, a reduction in aldehyde emissions was achieved, due to the high-temperature operation of the combustion chamber. However, efficiency deteriorated at times due to early selfignition timing. This was overcome by the use of lean fuel-air ratios, which resulted in both a reduction of NOx and an improvement in fuel consumption. With a premixed fuel supply system, wall surface ignition was unavoidable for combustion chamber surface temperatures greater than 800 K (527°C). Wall surface temperature swing and instantaneous heat flux increased substantially with ATAC operation under these conditions.

Original languageEnglish
Pages (from-to)176-184
Number of pages9
JournalJSME International Journal, Series B: Fluids and Thermal Engineering
Volume39
Issue number1
Publication statusPublished - 1996 Feb

Fingerprint

rejection
Methanol
engines
methyl alcohol
ceramics
Engines
atmospheres
heat
combustion chambers
Combustion chambers
surface temperature
fuel-air ratio
High temperature operations
internal combustion engines
fuel consumption
gasoline
wall temperature
Hot Temperature
formaldehyde
Aldehydes

Keywords

  • ATAC
  • Ceramics
  • Combustion
  • Internal Combustion Engine
  • Low Heat Rejection Engine
  • Methanol
  • NO
  • Two-Stroke Engine

ASJC Scopus subject areas

  • Fluid Flow and Transfer Processes
  • Physical and Theoretical Chemistry
  • Mechanical Engineering

Cite this

Combustion and emissions of low heat rejection ceramic methanol ATAC engines. / Iida, Norimasa; Hosonuma, Shinji; Yoshimura, Ken'ichi; Takase, Shigehisa.

In: JSME International Journal, Series B: Fluids and Thermal Engineering, Vol. 39, No. 1, 02.1996, p. 176-184.

Research output: Contribution to journalArticle

Iida, Norimasa ; Hosonuma, Shinji ; Yoshimura, Ken'ichi ; Takase, Shigehisa. / Combustion and emissions of low heat rejection ceramic methanol ATAC engines. In: JSME International Journal, Series B: Fluids and Thermal Engineering. 1996 ; Vol. 39, No. 1. pp. 176-184.
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