Abstract
The paper presents some results of examination of DF CI engine fuelled with kerosene-based fuel (Jet A-1) and propane. The aim was to obtain the maximum engine thermal and overall efficiency and checking the engine emissions for the application of significant share of propane as a main source of energy. The fuel which initiates the ignition was Jet A-1 provided by common rail system during the beginning of compression stroke. Propane was provided to inlet manifold in a gas phase. The method of providing of both fuels to the engine cylinder allowed to create nearly homogeneous mixture and realized HCCI process for dual fueling with Jet A-1 and propane. It was possible to compare two combustion strategies PCCI and HCCI for fuelling of CI engine with single fuel (Jet A-1) and dual fuelling with Jet A-1 and propane. The results of experiment show that the NOx and soot emissions are much lower than for standard CI or SI engines. The results also show very interesting potential role of propane in control of HCCI dual fuel combustion process which gives the new perspective of dual fuel engine development. The low levels of toxic components in exhaust gases encourage to test and develop this type of fuelling which could radically confine the negative influence on the environment as well as enable to apply an alternative fuels.
Highlights
Despite of anti-diesel campaign which is undertaken by some authorities especially municipal authorities from large cities to promote electromobility compression ignition engines are still widely used for transportation and power generation and have rather good perspective
Since emission aftertreatment systems such as Diesel Particulate Filters (DPF), Lean NOx Trap (LNT) and Selective Catalytic Reduction (SCR) systems often increase fuel consumption, in-cylinder technologies for emission reduction have been the focus of intense research [10]
Depending on the way of fueling two combustion strategies were examined during the tests: − PCCI – fueling with Jet A-1 only and dual fueling with Jet A-1 and propane for standard injection timing of Jet A-1 − HCCI – fueling with Jet A-1 only as well as dual fueling with Jet A-1 and propane
Summary
Despite of anti-diesel campaign which is undertaken by some authorities especially municipal authorities from large cities to promote electromobility compression ignition engines are still widely used for transportation and power generation and have rather good perspective. Diesel vehicles contribute to reduce CO2 emissions from road transport and to mitigating climate change. Diesel engines can cause environmental pollution owing to their high NOx and soot emissions. Since emission aftertreatment systems such as Diesel Particulate Filters (DPF), Lean NOx Trap (LNT) and Selective Catalytic Reduction (SCR) systems often increase fuel consumption, in-cylinder technologies for emission reduction have been the focus of intense research [10]. First of all revolutionary in-cylinder combustion strategies, especially low-temperature combustion, could convert the combustion process to more clean and more effective process. It can be connected with application of alternative fuels, especially more clean gas fuels. Depending on the way of fueling two combustion strategies were examined during the tests: − PCCI (premixed charge compression ignition) – fueling with Jet A-1 only and dual fueling with Jet A-1 and propane for standard injection timing of Jet A-1 − HCCI (homogeneous charge compression ignition) – fueling with Jet A-1 only as well as dual fueling with Jet A-1 and propane
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