Diesel engine combustion becomes very rough and can lead even to deflagration under high altitude conditions, which is harmful component durability. In this study, the effects of on main characteristics—in-cylinder fluid flow, spray behavior, pressure temperature distribution—were analyzed with CFD. A numerical model was built CONVERGE platform validated optical behavior trace measured by test ...

The increasing industrialization and motorization of the world has led to a step rise for the demand of petroleum-based fuels. Petroleum-based fuels are obtained from limited reserves. These finite reserves are highly concentrated in certain regions of the world. Therefore, those countries not having these resources are facing energy/foreign exchange crisis, mainly due to the import of crude pe...

Premixed or partially premixed compression ignition modes, such as homogeneous charge compression ignition (HCCI), have been a particular focus among researchers because of their potential to deliver enhanced fuel efficiency and meet exhaust emissions mandates without the addition of costly after-treatment technologies as currently required with traditional spark ignition (SI) and direct inject...

Calculations are described of knock suppression using direct ethanol injection in spark ignition gasoline/ethanol engines. The calculations show that evaporative cooling from direct ethanol injection, coupled with the high octane rating of ethanol, can be highly effective in inhibiting knock, thereby allowing use of small turbocharged engines with substantially increased efficiency. The calcula...

Engine manufacturers are constantly striving to find new and improved techniques for the monitoring and control of motor-vehicle engines. The aim is to achieve reduced exhaust emissions and superior fuel economy. Intelligent-systems techniques, such as neural networks and fuzzy methods, are attractive for application in this area because of their capabilities in pattern-recognition, modelling a...

current approaches to the analysis of internal combustion engines are no longer merely based on the first law of thermodynamics and are conducted from the second law either. the evaluation of processes by the first law cannot provide a sophisticated insight into the issue. so, due to the necessity of having a detailed perspective of the losses in different thermodynamic processes, a useful meth...

Ignition of Nanocomposite Thermites by Electric Spark and Shock Wave Report Title Nanocomposite 8Al ·MoO3 thermite particles were prepared using arrested reactive milling and ignited using two experimental techniques. In spark ignition, a monolayer of powder was placed on a conductive substrate and heated in air by a pulsed electrostatic discharge. In shock ignition, an individual particle was ...

Various solutions are being proposed and adopted by manufactures and researchers to improve the energetic and environmental performance of internal combustion engines within the transportation sector. For automotive spark ignition engines, gasoline direct injection is one of the presently preferred technologies, in conjunction with turbocharging and downsizing. One of the limiting phenomena of ...

During the intake process, working volume of cylinder is filled with a fresh charge. As noted, charge consists air in diesel engine, and engines ignition from an electric spark (gasoline carburetor or gasoline fuel injection, as well gas) – mixture vapors light combustible gas.