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A Turbocharged Dual-Fuel HCCI Engine

Författare

Summary, in English

A 6-cylinder truck engine is modified for turbocharged dual-fuel Homogeneous Charge Compression Ignition (HCCI) engine operation. Two different fuels, ethanol and n-heptane, are used to control the ignition timing. The objective of this study is to demonstrate high load operation of a full-size HCCI engine and to discuss some of the typical constraints associated with HCCI operation. This study proves the possibility to achieve high loads, up to 16 bar Brake Mean Effective Pressure (BMEP), and ultra-low NOdx emissions, using turbo charging and dual fuel. Although the system shows great potential, it is obvious that the lack of inlet air pre heating is a drawback at low loads, where combustion efficiency suffers. At high loads, the low exhaust temperature provides little energy for turbocharging, thus causing pump losses higher than for a comparable diesel engine. Design of turbocharger therefore, is a key issue in order to achieve high loads in combination with high efficiency. In spite of these limitations, brake thermal efficiencies and power rating close to those of the original diesel engine are achieved with significant reduction in NOdx emissions. The maximum efficiency is 41.2%, which is slightly lower than for the original diesel engine.

Publiceringsår

2001-05-07

Språk

Engelska

Publikation/Tidskrift/Serie

SAE Special Publications

Volym

2001

Issue

1627

Dokumenttyp

Konferensbidrag

Förlag

Society of Automotive Engineers

Ämne

  • Energy Engineering

Nyckelord

  • HCCI
  • High Load Operation
  • Engine
  • Turbocharged

Conference name

International Spring Fuels and Lubricants Meeting and Exhibition

Conference date

2001-05-07 - 2001-05-09

Conference place

Orlando, FL, United States

Status

Published

ISBN/ISSN/Övrigt

  • ISSN: 0099-5908