Investigations on Combustion and Performance Characteristics of a Turbocharged Natural gas and Pilot Ignition Dual Fuel Engine
About: The article was published on 2005-10-24. It has received 9 citations till now. The article focuses on the topics: Homogeneous charge compression ignition & Ignition system.
Citations
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01 Jan 2012
TL;DR: There is a growing interest in alternative transport fuels and there are two underlying reasons for this interest; the desire to decrease the environmental impact of transports and the need to compensate for compens....
Abstract: There is a growing interest in alternative transport fuels. There are two underlying reasons for this interest; the desire to decrease the environmental impact of transports and the need to compens ...
29 citations
Cites background from "Investigations on Combustion and Pe..."
...Several attempts to model dual fuel combustion have been made [21], [22], [23], [24], [25], [26], [27], [28], [29], [30], [31]....
[...]
...Some of the models are validated for irrelevant operating conditions, [21], [23] while others show very poor congruence with measurements, [26], [22], [31]....
[...]
Dissertation•
01 Jan 2014
TL;DR: In this article, a large interest in alternative transport fuels is discussed, and there are two underlying reasons for this interest: the desire to decrease the environmental impact of transports and the need to...
Abstract: Currently there is a large interest in alternative transport fuels. There are two underlying reasons for this interest: the desire to decrease the environmental impact of transports and the need to ...
20 citations
Cites background from "Investigations on Combustion and Pe..."
...Several attempts to model dual fuel combustion have been made [21], [22], [23], [24], [25], [26], [27], [28], [29], [30], [31]....
[...]
...Some of the models are validated for irrelevant operating conditions, [21], [23] while others show very poor congruence with measurements, [26], [22], [31]....
[...]
TL;DR: In this article, an experimental investigation was carried out to study the effect of injection timing, diesel injection pressure, substitution rate of natural gas as well as engine load on the combustion and emission characteristics of an electronically controlled common-rail diesel/natural gas dual fuel engine.
Abstract: An experimental investigation was carried out to study the effect of injection timing, diesel injection pressure, substitution rate of natural gas as well as engine load on the combustion and emission characteristics of an electronically controlled common-rail diesel/natural gas dual fuel engine. The tests were conducted at a fixed engine speed of 1200 r/min, while other parameters were varied in reference to different study purposes. It can be concluded from the experimental results that maximum in-cylinder pressure and maximum heat release rate as well as the combustion noise are generally increased as injection timing advances and injection pressure increases, while decreases at higher substitution rate. Concerning the emission characteristics, THC and CO emissions could be improved by advancing injection timing and increasing diesel injection pressure with penalty on NOx emissions; in addition, THC emissions are significantly increased at higher load and higher substitution rate, while CO emissions reduce considerably with increasing load but tend to be less sensitive to substitution rate; NOx emissions can be mitigated by application of higher substitution rate and get worse as engine load increases.
17 citations
TL;DR: In this article, an experiment was conducted on a single-cylinder diesel engine with the port fuel injection (PFI) of methanol and the results revealed that, because of the lower cetane number and larger latent evaporation heat value, the ignition timing delayed clearly, the maximum incylinder gas pressure decreased, and the maximum heat release rate increased with the PFI.
Abstract: A large number of published papers reveal that gas-to-liquid (GTL) fuel has the potential for reducing the particulate matter (PM), CO, and hydrocarbon (HC) emissions to a certain degree, and NOx emissions can also be reduced by optimizing the engine parameters or at a larger exhaust gas recirculation (EGR) rate. To reduce the PM and NOx emissions simultaneously on a larger scale, an experiment was conducted of GTL combustion and emissions on a single-cylinder diesel engine with the port fuel injection (PFI) of methanol. The results revealed that, because of the lower cetane number and larger latent evaporation heat value of methanol, the ignition timing delayed clearly, the maximum in-cylinder gas pressure decreased, and the maximum heat release rate increased with the PFI of methanol. At a lower to medium overall equivalence ratio, the maximum in-cylinder gas temperature decreased linearly with the increase of the premixed ratio of methanol. At a large overall equivalence ratio, the maximum gas temperat...
9 citations
24 Sep 2012
9 citations
References
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01 Mar 1993
31 citations
01 Jan 1962
26 citations
TL;DR: In this article, the results of carbonyl compounds and polycyclic aromatic hydrocarbons (PAH) emissions analysis for a heavy-duty Otto cycle engine fueled with natural gas were presented.
Abstract: Previous works carried out in Istituto Motori laboratories have shown that natural gas is a suitable fuel for general means of transportation. This is because of its favorable effects on engine performance and pollutant emissions. The natural gas fueled engine provided the same performance as the diesel engine, met R49 emission standards, and showed very low smoke levels. On the other hand, it is well known that internal combustion engines emit some components that are harmful for human health, such as carbonyl compounds and polycyclic aromatic hydrocarbons (PAH). This paper shows the results of carbonyl compounds and PAH emissions analysis for a heavy-duty Otto cycle engine fueled with natural gas. The engine was tested using the R49 cycle that is used to measure the regulated emissions. The test analysis has been compared with an analysis of a diesel engine, tested under the same conditions. Total PAH emissions from the CNG engine were about three orders of magnitude lower than from the diesel engine. Formaldehyde emission from the CNG engine was about ten times as much as from the diesel engine, while emissions of other carbonyl compounds were comparable.
18 citations
01 Feb 1978
TL;DR: In this article, a simulation model of the thermodynamic cycle of a three-valve stratified charge engine is described, with particular reference to the combustion process, and the adequacy of the simulation model for analyzing the performance of a 3V SCE engine is proved by the following calculations: mass flow, gas temperature, and velocity through the torch opening during the combustion period; mass flow rate and temperature of exhaust gases through the exhaust valve; gas pressure and temperature during exhaust and intake processes; and mass flow through the main and auxiliary intake valves.
Abstract: A simulation model of the thermodynamic cycle of a three-valve stratified charge engine is described, with particular reference to the combustion process. Computed pressure and temperature/crankangle diagrams compare satisfactorily with experimental data, except for a large discrepancy in the temperature/crankangle diagrams in one case. There is qualitative agreement between predicted and experimental values of the major exhaust emissions. There is also good agreement between the computed equivalence ratio in the auxiliary chamber and the measured value for an operating condition. The adequacy of the simulation model of the thermodynamic cycle for analyzing the performance of a three-valve stratified charge engine is proved by the following calculations: mass flow, gas temperature, and velocity through the torch opening during the combustion period; mass flow rate and temperature of exhaust gases through the exhaust valve; gas pressure and temperature during exhaust and intake processes; and mass flow through the main and auxiliary intake valves. The model seems to be inadequate for measuring cylinder gas temperature in the main chamber during the combustion period and needs to be modified by considering such factors as the mixture formation and the mixing of jet flame in the main combustion chamber.
14 citations
12 Jun 2000
11 citations