Active Thermo-Atmosphere Combustion (ATAC) - A New Combustion Process for Internal Combustion Engines

Onishi, Shigeru; Jo, Souk Hong; Shoda, Katsuji; Jo, Pan Do; Kato, Satoshi

doi:10.4271/790501

Cited by 790 publications

(360 citation statements)

References 3 publications

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“…CAI combustion technology was first applied successfully to two-stroke gasoline engines by Onishi et al [5] and by Noguchi et al [6]. For two-stroke gasoline engines, CAI combustion was found to increase fuel economy, produce extremely low NOx emissions, and reduce unburned hydrocarbon (HC) emissions.…”

Section: Introductionmentioning

confidence: 99%

Performance and Analysis of a 4-Stroke Multi-Cylinder Gasoline Engine with CAI Combustion

Zhao

Jian

et al. 2002

SAE Technical Paper Series

171

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Controlled Auto-Ignition (CAI) combustion was realised in a production type 4-stroke 4-cylinder gasoline engine without intake charge heating or increasing compression ratio. The CAI engine operation was achieved using substantially standard components modified only in camshafts to restrict the gas exchange processThe engine could be operated with CAI combustion within a range of load (0.5 to 4 bar BMEP) and speed (1000 to 3500 rpm). Significant reductions in both specific fuel consumption and CO emissions were found. The reduction in NOx emission was more than 93% across the whole CAI range. Though unburned hydrocarbons were higher under the CAI engine operation.In order to evaluate the potential of the CAI combustion technology, the European NEDC driving cycle vehicle simulation was carried out for two identical vehicles powered by a SI engine and a CAI/SI hybrid engine, respectively. The simulation results showed only moderate improvement in fuel economy and exhaust emissions because of low utilisation of CAI during the drive cycle.In order to take full advantage of the CAI combustion technology, detailed analyses were carried out on the engine's performance, heat release and combustion characteristics, emissions and the effect of gas exchange processes. These analyses showed that the engine's performance and emissions were mainly affected by the trapped residual fractions and residual temperature. In addition, the backflow was found to affect the combustion and emission as well.

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Section: Introductionmentioning

confidence: 99%

Performance and Analysis of a 4-Stroke Multi-Cylinder Gasoline Engine with CAI Combustion

Zhao

Jian

et al. 2002

SAE Technical Paper Series

171

View full text Add to dashboard Cite

show abstract

“…The HCCI combustion was initially recognised at the twostroke engines in late 1970's by Onishi et al [1] and Noguchi et al [6]. They observed that the premixed air-fuel mixture ignites simultaneously at many points without obvious flame propagation.…”

Section: Introductionmentioning

confidence: 98%

Influence of the Variable Valve Timing Strategy on the Control of a Homogeneous Charge Compression (HCCI) Engine

Milovanović¹,

Chen²,

Turner³

2004

SAE Technical Paper Series

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“…CAI combustion was first studied in the late 1970s by Onishi et al (1979) (the ATAC paper) and Nogushi et al (1979) working with conventional 2-stroke gasoline engines. The first results with a 4-stroke gasoline engine were achieved with intake charge heating, as reported by Najt and Foster (1983).…”

Section: Introductionmentioning

confidence: 99%

“…CAI/HCCI shows a great potential in lowering both fuel consumption and emissions levels, in a substantially standard engine concept. Moreover, it may avoid the need for expensive and complicated exhaust after-treatment systems (Stanglmaier and Roberts, 1999).…”

Section: Introductionmentioning

confidence: 99%

Performance and emissions of a 4-cylinder gasoline engine with Controlled Auto-Ignition

Martins¹,

Zhao²

2012

J. Braz. Soc. Mech. Sci. & Eng.

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Active Thermo-Atmosphere Combustion (ATAC) - A New Combustion Process for Internal Combustion Engines

Cited by 790 publications

References 3 publications

Performance and Analysis of a 4-Stroke Multi-Cylinder Gasoline Engine with CAI Combustion

Performance and Analysis of a 4-Stroke Multi-Cylinder Gasoline Engine with CAI Combustion

Influence of the Variable Valve Timing Strategy on the Control of a Homogeneous Charge Compression (HCCI) Engine

Performance and emissions of a 4-cylinder gasoline engine with Controlled Auto-Ignition

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