Effect of Fuel Properties on First Cycle Fuel Delivery in a SI Engine

Lang, Kevin R.; Cheng, Wai K.

doi:10.4271/2004-01-3057

Cited by 13 publications

(2 citation statements)

References 10 publications

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“…Their results showed the most important overall conclusion is that cycle resolved control of the equivalence ratio may be the most effective way of reducing cold-start UHC emissions. Lang et al studied the effects of fuel properties on first cycle fuel delivery in a SI engine. Their studies showed that an empirical procedure was established to assess the change of minimum required injected mass when the fuel properties were changed.…”

Section: Introductionmentioning

confidence: 99%

Combustion of a Spark-Ignition Methanol Engine during Cold Start under Cycle-by-Cycle Control

et al. 2008

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The effects of ambient temperature, intake air preheating, additional liquefied petroleum gas (LPG) injected into the inlet port, and methanol injection timing on the cold-start first cycle firing behavior of an electronically controlled inlet port methanol injection spark-ignition (SI) engine were investigated under a single-cycle fuel injection strategy. The results showed that the ambient temperature significantly affects the start firing behavior of the engine. When the ambient temperature is below 16 °C, the methanol engine can not be started reliably without auxiliary start aids even at the large amount of methanol injected per cycle. Using a glow plug to heat the engine inlet manifold and additional LPG injected into the inlet port result in a reliable firing of the engine. The amount of methanol injected per cycle for the reliable firing during the cold start of the engine reduces obviously, and the cold-start performance improves significantly with the rise in ambient temperature. If the fuel injection timing is controlled reasonably at the engine cold start, it is possible to ensure the most fuel−air mixture to enter the cylinder on time, to realize the ideal concept of the next cycle combustion after fuel injection. Optimal control on the fuel injection timing improves the cold-start reliability and reduces the cold-start HC emissions from the engine.

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Section: Introductionmentioning

confidence: 99%

Combustion of a Spark-Ignition Methanol Engine during Cold Start under Cycle-by-Cycle Control

et al. 2008

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“…This study also builds upon the methodology developed at the Sloan Automotive Laboratory at MIT for experimentally studying the first combustion cycle and the cranking process in PFI engines [11,12,13,14,15,16,17].…”

Section: Introductionmentioning

confidence: 99%

Cycle-by-Cycle Analysis of Cold Crank-Start in a GDI Engine

Rodriguez¹,

Cheng²

2016

SAE Int. J. Engines

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The first 3 cycles in the cold crank-start process at 20°C are studied in a GDI engine. The focus is on the dependence of the HC and PM/PN emissions of each cycle on the injection strategy and combustion phasing of the current and previous cycles. The PM/PN emissions per cycle decrease by more than an order of magnitude as the crank-start progresses from the 1 st to the 3 rd cycle, while the HC emissions stay relatively constant. The wall heat transfer, as controlled by the combustion phasing, during the previous cycles has a more significant influence on the mixture formation process for the current cycle than the amount of residual fuel. The results show that the rise in HC emissions caused by the injection spray interacting with the intake valves and piston crown is reduced as the cranking process progresses. Combustion phasing retard significantly reduces the PM emission. The HC emissions, however, are relatively not sensitive to combustion phasing in the range of interest.

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Effect of fuel metering on combustion and emissions of a PFI gasoline engine during fast startup under an HEV-like mode

2014

Int.J Automot. Technol.

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Effect of Fuel Properties on First Cycle Fuel Delivery in a SI Engine

Cited by 13 publications

References 10 publications

Combustion of a Spark-Ignition Methanol Engine during Cold Start under Cycle-by-Cycle Control

Combustion of a Spark-Ignition Methanol Engine during Cold Start under Cycle-by-Cycle Control

Cycle-by-Cycle Analysis of Cold Crank-Start in a GDI Engine

Effect of fuel metering on combustion and emissions of a PFI gasoline engine during fast startup under an HEV-like mode

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