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

Gong, Changming; Deng, Baoqing; Wang, Shu; Su, Yan; Gao, Qing; Liu, Xunjun

doi:10.1021/ef8001636

Cited by 43 publications

(16 citation statements)

References 10 publications

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“…Methanol is an excellent fuel in its own right or it can be blended with gasoline (85% methanol and 15% gasoline) or as pure methanol (100% methanol), although it has half the volumetric energy density of gasoline or diesel [7,15,16,[65][66][67]. Methanol is a transportation fuel and has many significant advantages as compared to hydrogen, gasoline, and has better fuel conversion efficiencies than gasoline thanks to the larger vaporization heat, and the much better resistance to knock that make it the best option for small, turbocharged, high power density, directly injected stoichiometric engines [37,68].…”

Section: Methanol Fuel Used On Ic Enginementioning

confidence: 99%

“…Methanol is considered to be one of the most favorable fuels for engines, for instance, (1) it can be used in a high compression ratio spark ignition (SI) engine that could replace diesels in certain vocational applications; (2) it can be used in an inlet port injection SI engine; (3) it can be used in a high compression direct-injection stratified charge SI engine; (4) it can be used in a direct-injection SI engine; and (5) it can be used in a turbocharged, port-fuel-injected, high compression ratio medium duty engine [6][7][8][9][10].…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

An overview of methanol as an internal combustion engine fuel

Zhen

Wang

2015

Renewable and Sustainable Energy Reviews

415

View full text Add to dashboard Cite

Section: Methanol Fuel Used On Ic Enginementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

An overview of methanol as an internal combustion engine fuel

Zhen

Wang

2015

Renewable and Sustainable Energy Reviews

415

View full text Add to dashboard Cite

“…The ignition advance angle affected the crankshaft speed, while it had only a mild impact on the HC emissions. Gong et al 19 investigated the effects of the ambient temperature, the intake air preheating, the additional LPG injected into the inlet port and the methanol injection timing on the firing behaviour of the cold-start first cycle for a methanol inlet-port-injection SI engine. Optimal control of the fuel injection timing improved the cold-start reliability and also reduced the cold-start HC emissions of the engine.…”

Section: Introductionmentioning

confidence: 99%

Influences of the fuel injection parameters on the first-cycle firing and the combustion characteristics during the direct-start process for a gasoline direct-injection engine

Xie

Wei

et al. 2016

Proceedings of the Institution of Mechanical Engineers, Part D:

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The direct-start method without requiring a starter is a viable and cost-effective solution for generating a frequent and efficient restarting process when start–stop technology is used on a gasoline direct-injection engine. During the direct-start process, the first-cycle combustion characteristics play a key role in determining whether the start mode is successful or not, because the start energy is wholly derived from the in-cylinder combustion without the support of a starter motor on the gasoline direct-injection engine. However, the first-cycle fuel–air mixing and combustion characteristics during the direct-start process of a gasoline direct-injection engine are not fully understood. In this work, the influences of the injection parameters, including the delay between the injection and ignition, the excess air ratio for the single-injection strategy, the delay between the first injection and the second injection for the dual-injection strategy and the ratio of the fuel mass in the first injection to the fuel mass in the second injection for the dual-injection strategy, on the combustion pressure, the heat release rate, the accumulated heat release and the indicated work were investigated experimentally by cycle-by-cycle analysis. The results show that the optimal delay between the injection and ignition of the single-injection strategy was 200 ms as a longer delay or a shorter delay can result in a reduction in the heat released rate, the indicated work and the firing boundary. A shorter delay with the optimal injected fuel mass tended to be more beneficial to the accumulated heat released, the indicated work and the crankshaft speed. Furthermore, with increasing delay and increasing fuel ratio of the fuel mass in the first injection to the fuel mass in the second injection for the dual-injection strategy, the heat release rate, the accumulated heat release and the indicated work first increased and then decreased. The optimum delay was 10 ms and the ratios of the fuel mass in the first injection to the fuel mass in the second injection were 4/1 and 5/1 respectively under the test conditions. Additionally, the dual-injection strategy with an optimized control parameter produced a higher heat release and higher indicated work than the single-injection strategy did.

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“…The available literature shows that most studies have focused on pure gasoline operations; [12][13][14] there are no studies of a methanol-gasoline engine cold start at -7°C or lower. 10,15,16 It is essential to study the coldstart performance of a spark ignition engine at lower temperatures.…”

Section: Introductionmentioning

confidence: 99%

Investigation of the cold-start engine performance at a low temperature for an engine fuelled with alternative fuel

Xiao

Wang

Song³

et al. 2013

Proceedings of the Institution of Mechanical Engineers, Part D:

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With the stringent emissions regulations for spark ignition engines, attention has always been paid to the cold-start emissions of hydrocarbons and carbon monoxide. The engine speed is an external parameter that can reflect the combustion quality. In this paper, a four-cylinder spark ignition engine fuelled with gasoline and methanol-gasoline blends with methanol fractions of 10%, 30% and 85% is studied; the cold-start transient performances are investigated at ambient temperature of 15°C, -7°C, -15°C and -25°C respectively. The engine speed curves indicate the existence of misfire cycles and incomplete combustion cycles, which are proved by the measured in-cylinder temperatures and the data on the indicated mean effective pressure. The experimental results show that the addition of methanol increases the starting time at low temperatures, which improves the combustion, however. The engine started successfully for all the blending ratios and ambient temperatures except for the 85% methanol-gasoline blend at -25°C. During the cold-start process, the peak speed and the transient period increase with increasing methanol fraction, while the speed fluctuations decrease. Thus the addition of methanol improves the cold-start performance of the engine.

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

Cited by 43 publications

References 10 publications

An overview of methanol as an internal combustion engine fuel

An overview of methanol as an internal combustion engine fuel

Influences of the fuel injection parameters on the first-cycle firing and the combustion characteristics during the direct-start process for a gasoline direct-injection engine

Investigation of the cold-start engine performance at a low temperature for an engine fuelled with alternative fuel

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