Analysis of Combustion Behavior During Cold-Start and Warm-Up Process of SI Gasoline Engine

Yong, Cheng; Wang, Jianxin; Zhuang, Ren-Jun; Wu, Ning

doi:10.4271/2001-01-3557

Cited by 22 publications

(11 citation statements)

References 1 publication

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“…Cheng et al (2001) provided an experiment-based study which focuses on seeking a good scheduling of A/F and SA by experiments: comparing the presented cold starting scheme with these results show that the idling speed is regulated at a much lower level with a better transient performance and the A/F of each cylinder is constrained to a much smaller range. Furthermore, as a result, the A/F is constrained in a strict range, even though this work does not address the emission control problem during cold starting which is widely investigated in automotive control community.…”

Section: Discussionmentioning

confidence: 93%

“…Sampson and Heywood (1995), Cheng, Wang, Zhuang, and Wu (2001), Yamada, Gardner, Bruno, Zello, and Santavicca (2002) and Liu, Li, and Deng (2007) provide precise descriptions for the dynamic characteristics during cold starting transient: experimental results show that engine performance in terms of combustion reliability, speed transition and emission is significantly affected by instantaneous changes of engine state from cold to warm-up. On the other hand, it is known that SI engine is a complex physical system with multi-actuation control inputs, fuel injection, throttle and SA, which play different roles on engine performance (Hrovat & Sun, 1997;Liu et al, 2007).…”

Section: Introductionmentioning

confidence: 98%

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Model-based cold-start speed control scheme for spark ignition engines

Zhang

Shen

Marino

2010

Control Engineering Practice

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Section: Discussionmentioning

confidence: 93%

Section: Introductionmentioning

confidence: 98%

Model-based cold-start speed control scheme for spark ignition engines

Zhang

Shen

Marino

2010

Control Engineering Practice

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“…reports [3][4][5][6] also prove that 50-80 per cent of HC and carbon monoxide (CO) emissions are formed during the cold-start. There have been many investiThe effectiveness of after-treatment systems depends gations into the cold-start of gasoline engines over on the exhaust gas temperature, which is low during the last decades.…”

Section: Introductionmentioning

confidence: 88%

Oxygen-Enriched Combustion of the First Cycle During Cold Start in a Liquefied Petroleum Gas Spark-Ignition Engine

Gong

Qiao

et al. 2006

Proceedings of the Institution of Mechanical Engineers, Part D:

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The first firing cycle is very important for cold-start. Misfire of the first firing cycle can lead to significant hydrocarbon (HC) emissions and affect the subsequent cycles. Research has proved that the oxygen-enriched intake air (OEA) method is a useful technique to reduce cold-phase HC and carbon monoxide (CO) emissions from automotive gasoline engines. However, few researchers have studied oxygen-enriched combustion characteristics based on the first firing cycle analysis during cold-start. The present paper presents a comparison of atmospheric air with OEA in the combustion of the first cycle during cold-start in a liquefied petroleum gas spark-ignition engine. Cylinder pressure, engine speed, HC, CO, and nitric oxide (NO) emissions were collected. The heat release rate of atmospheric air and OEA combustion are calculated. Test results show that atmospheric air and OEA have similar high transients in HC emissions at cold-start. However, OEA reduces CO emissions and increases NO emissions. Comparing the heat release rate curves, oxygen-enriched combustion can lead to heat release earlier and higher than normal air combustion.

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“…Therefore, HC emissions increase. Meanwhile, unburned mixture trapped in the clearance gap around the piston during compression stroke returns to the burned mixture during the expansion stroke; however, the temperature of burned mixture is not high enough and oxidation effect becomes weak, which also contribute large amounts of unburned HC [5][6][7][8][9]. Figure 7 shows the curves of HC and CO emissions, the AFR (a), the speed (n) and the exhaust gas temperature (T e ) within the first 200 s after cold start.…”

Section: Cold-start Emission Characteristicsmentioning

confidence: 98%

Combustion characteristics of SI engine fueled with methanol-gasoline blends during cold start

Song

Hu²,

Liu

et al. 2008

Front. Energy Power Eng. China

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A 3-cylinder port fuel injection (PFI) engine fueled with methanol-gasoline blends was used to study combustion and emission characteristics. Cylinder pressure analysis indicates that engine combustion is improved when methanol is added to gasoline. With the increase of methanol, the flame developing period and the rapid combustion period are shortened, and the indicated mean effective pressure increases during the first 50 cycles. Meanwhile, a novel quasi-instantaneous sampling system was designed to measure engine emissions during cold start and warm-up. The results at 5uC show that unburned hydrocarbon (UHC) and carbon monoxide (CO) decrease remarkably. Hydrocarbon (HC) reduces by 40% and CO by 70% when fueled with M30 (30% methanol in volume). The exhaust gas temperature is about 140uC higher at 200 s after operation compared with that of gasoline.

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Analysis of Combustion Behavior During Cold-Start and Warm-Up Process of SI Gasoline Engine

Cited by 22 publications

References 1 publication

Model-based cold-start speed control scheme for spark ignition engines

Model-based cold-start speed control scheme for spark ignition engines

Oxygen-Enriched Combustion of the First Cycle During Cold Start in a Liquefied Petroleum Gas Spark-Ignition Engine

Combustion characteristics of SI engine fueled with methanol-gasoline blends during cold start

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