Exhaust Emissions of Diesel, Gasoline and Natural Gas Fuelled Vehicles

Hupperich, Patrick; Dürnholz, Manfred

doi:10.4271/960857

Cited by 15 publications

(2 citation statements)

References 2 publications

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“…Automobiles as the power machinery makes a contribution on the human society since production, but with the ever increasing number of cars, it also brings a series of serious problems such as the energy crisis and environmental pollution. On one hand, many countries have made strict emission regulations, on the other hand, we focus on the research and development of alternative fuels instead of conventional fossl fuels(gasoline and diesel).As CNG engines have the great advantage in the reserves and the better emission characteristics the world countries pay attention to the research and development of CNG engine [1][2][3] .…”

Section: Introductionmentioning

confidence: 99%

Effect of the Ignition Time on the Turbocharged Lean-Burned CNG Engine

Pang

et al. 2013

AMR

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Experimental study on the combustion and emission performance of turbocharged lean-burned CNG engine by the ignition time. Speed of the engine is 1340r/min,1615r/min,1890r/min,with 25%, 50%,75%,100% load. Results show that when keeping other combustion boundary conditions unchanged, the effect of the ignition time on engine output torque and CH4 is little,the effect changes as speed varies from low speed and load conditions to higher level.However,the effects of ignition time on NOx emissions are huge.With the backward changes of the ignition time,NOx emissions has decreased significantly.

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Section: Introductionmentioning

confidence: 99%

Effect of the Ignition Time on the Turbocharged Lean-Burned CNG Engine

Pang

et al. 2013

AMR

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“…With the energy crisis and air pollution issue getting increasingly severe, research on compressed natural gas engine has important practical significance. As a clean alternative fuel, natural gas has been widely applied in engine for its abundant reserve and less combustion pollution [1][2][3] .…”

Section: Introductionmentioning

confidence: 99%

Experimental Research on the Effect of Excess Air Ratio on Turbocharged Lean-Burned CNG Engine

Pang

et al. 2013

AMR

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Experimental research on the effect of excess air ratio on dynamic and emission performance of turbocharged lean-burned CNG engine. The 12 test conditions contain engine speeds of 1300r/min, 1600r/min, and 1900r/min, with 25%, 50%, 75%, 100% load separately. When keeping other combustion boundary conditions unchanged, the excess air ratio has little effect on engine output torque at almost all test conditions, but has obvious effect on CH4 and NOx emission. With the excess air ratio increasing, the emission of CH4 has increased while the NOx emission has decreased significantly. When the λ value is in the range of 1.4-1.45, the emission level is lower.

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CFD-3D Analysis of a Light Duty Dual Fuel (Diesel/Natural Gas) Combustion Engine

2014

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This study investigated dual-fuel operation with a light duty Diesel engine with Natural gas over a wide engine load range. Natural gas was hereby injected into the intake duct, while Diesel was injected directly into the cylinder. At low loads, high fuel shares are critical in terms of combustion stability and emissions of unburnt hydrocarbons. Dual-fuel combustion has the advantage of providing diesel-like efficiency with Natural gas as the primary fuel, providing potential increases in efficiency of 50% while reducing emissions. Typically a small liquid fuel pilot is injected into a lean mixture of air and a more volatile fuel that is less inclined to auto-ignite. Often it is difficult to simulate the separate chemical effects of the two fuels. In present study we are using non premixed type of combustion model for better mixing and penetration of fuel and air so the complete combustion is achieved and emission is reduced by a great amount as compare to premixed method. NOx emission is reduced as compare to previous base research. Fluent accurately tracks flame propagation, which is critical for dual-fuel cases where the injection and auto-ignition of the liquid pilot fuel serves to initiate the flame propagation. In Fluent the simulation can simultaneously consider both auto-ignition and flame-propagation modes of combustion progress. Fluent fluid flow allows investigations of fuel or additive composition effects, impacts on liquid pilot amount and timing, and NOx reduction techniques such as EGR, etc.

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Exhaust Emissions of Diesel, Gasoline and Natural Gas Fuelled Vehicles

Cited by 15 publications

References 2 publications

Effect of the Ignition Time on the Turbocharged Lean-Burned CNG Engine

Effect of the Ignition Time on the Turbocharged Lean-Burned CNG Engine

Experimental Research on the Effect of Excess Air Ratio on Turbocharged Lean-Burned CNG Engine

CFD-3D Analysis of a Light Duty Dual Fuel (Diesel/Natural Gas) Combustion Engine

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