Engine injection strategy and renewable fuel both can improve nitrogen oxides (NOX) smoke/soot emissions in a common-rail compression ignition (CI) diesel engine. The effects of different postinjection (PI) timings (15, 30, 45) after top dead center (aTDC) pressures (550 650 bar) on pollutant were investigated for combustion (soybean biodiesel). results showed that the levels carbon monoxide (C...

various combustion characteristics and properties are studied while selecting a fuel for any engine. the choice of the engine and fuel are highly interrelated. vegetable oil is one obvious fuel particularly because their fuel properties are closer to diesel fuel. two important properties, the cetane number and the calorific value are similar to diesel. hence diesel engines can be operated on ve...

the intension in this work is to investigate the effect of different bending manifold pipes on engine performance for different engine speed. Power, Torque, and BSFC were calculated and presented to show the effect of varying bending pipes angles on them for all cases considered. A special program used to carry out the calculations. A simulation model for 4-cylinders spark ignition engine with ...

This study investigates the ignition and combustion characteristics of interacting diesel-pilot hydrogen (H 2 ) jets under simulated compression-ignition engine conditions. Two converging single-hole injectors were used to inject H into an optically accessible constant-volume chamber (CVCC). The parameters varied include fuel injection sequence, timing between injections, ambient temperature (7...

In this paper, the effect of pre-injection timing on combustion and emission performance methanol/diesel high premixed charge compression ignition (HPCCI) mode at low load was studied by three-dimensional numerical simulation. The simulation is carried out under conditions 1900 r/min 25% load, diesel mass remains constant changed 50% 60% methanol ratio respectively. results show that with delay...

Ignition and propagation of a reaction front in a counterflow system of an iso-octane/air stream mixing with an exhaust gas stream is computationally investigated to understand the fundamental characteristics of homogeneous charge compression ignition (HCCI) auto-ignition. Various mixing rates are imposed on the system and the effects of dissipation rates on auto-ignition are studied. Ignition ...

Homogeneous charge compression ignition (HCCI) is a novel combustion strategy for IC engines that exhibits dramatic decreases in fuel consumption and exhaust emissions. Originally conceived in 1979, the HCCI methodology has been revisited several times by industry but has yet to be implemented because the process is difficult to control. To help address these control challenges, the authors her...

Nowadays, increased attention has been focused on internal combustion engine fuels. Regarding environmental effects of internal combustion engines particularly as sources of pollution and depletion of fossil fuels, compressed natural gas has been introduced as an alternative to gasoline and diesel fuels in many applications. A high research octane number which allows combustion at higher co...