Improvement of combustion and exhaust gas emissions in a passenger car diesel engine by modification of combustion chamber design

Takashi Kaminaga, Jin Kusaka

研究成果: Conference article

5 引用 (Scopus)

抄録

Three types of combustion chamber configurations (Types A, B, and C) with compression ratio lower than that of the baseline were tested for improved performance and exhaust gas emissions from an inline-four-cylinder 1.7-liter common-rail diesel engine manufactured for use with passenger cars. First, three combustion chambers were examined numerically using CFD code. Second, engine tests were conducted by using Type B combustion chamber, which is expected to have the best performance and exhaust gas emissions of all. As a result, 80% of NOx emissions at both low and medium loads at 1500 rpm, the engine speed used frequently in the actual city driving, improved with nearly no degradation in smoke emissions and brake thermal efficiency. It was shown that a large amount of cooled EGR enables NOx-free combustion with long ignition delay. In addition, the low compression ratio piston led to 22% improvement on maximum torque at the same engine speed without increasing maximum cylinder pressure.

元の言語English
ジャーナルSAE Technical Papers
DOI
出版物ステータスPublished - 2006 1 1
イベントPowertrain and Fluid Systems Conference and Exhibition - Toronto, ON, Canada
継続期間: 2006 10 162006 10 19

Fingerprint

Passenger cars
Combustion chambers
Exhaust gases
Gas emissions
Diesel engines
Engine cylinders
Engines
Compression ratio (machinery)
Smoke
Brakes
Pistons
Ignition
Rails
Computational fluid dynamics
Torque
Degradation

ASJC Scopus subject areas

  • Automotive Engineering
  • Safety, Risk, Reliability and Quality
  • Pollution
  • Industrial and Manufacturing Engineering

これを引用

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abstract = "Three types of combustion chamber configurations (Types A, B, and C) with compression ratio lower than that of the baseline were tested for improved performance and exhaust gas emissions from an inline-four-cylinder 1.7-liter common-rail diesel engine manufactured for use with passenger cars. First, three combustion chambers were examined numerically using CFD code. Second, engine tests were conducted by using Type B combustion chamber, which is expected to have the best performance and exhaust gas emissions of all. As a result, 80{\%} of NOx emissions at both low and medium loads at 1500 rpm, the engine speed used frequently in the actual city driving, improved with nearly no degradation in smoke emissions and brake thermal efficiency. It was shown that a large amount of cooled EGR enables NOx-free combustion with long ignition delay. In addition, the low compression ratio piston led to 22{\%} improvement on maximum torque at the same engine speed without increasing maximum cylinder pressure.",
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