The number of injector holes and the fuel-injection pressure in an internal combustion engine can affect performance exhaust emissions. Conversion a port-injection gasoline to HCNG direct-injection improves In addition, increasing injection helps increase performance. this study, AVL Fire software was used perform simulation by certain adjustments. applied mods 15, 20, 25 bars, numbers were 3 6...

Polynuclear or polycyclic aromatic hydrocarbons (PAH) are known to be one of the most dangerous hydrocarbons due to their carcinogenic potential. Some PAH have been measured and regulated in the atmosphere to quantify the air quality. However, in order to better understand the presence of these compounds in the atmosphere, it is also important to study the PAH sources. In this paper, the partic...

• Adding CeO 2 nanopowder and CNT as fuel additives leads to reduced emissions. Fuel reduce the penetration of DF during injection at low ambient pressure. increases GTL after injection. Higher pressure or temperature a increased average cone angle. Penetration reduces with growing This work aims experimentally investigate demonstrate impacts using Cerium Oxide (CeO ) multi-wall carbon nanotube...

This paper presents experimental test results of a new compressed natural gas direct injection (CNG-DI) engine that has been developed from modification of a multi cylinder gasoline port injection (PI) engine. The major modifications done are (1) the injection system has been modified to gas direct injection using new high pressure gas injectors, (2) compression ratio has been changed from 10 t...

Stringent CAFÉ regulations along with technological advances in materials, high-pressure fuel injection and complex turbo charging systems have rekindled interest in the area of Diesel engines for passenger vehicle applications. A modern Diesel engine is not only clean and quiet but also allows comparable drivability relative to gasoline engines with considerable improvements in fuel economy. H...

One of the most vital factors in combustion control is Air-to-Fuel Ratio (AFR) estimation and control. In this work a detailed mathematical, nonlinear and control oriented model of dynamic processes of turbocharged diesel engines is presented. This model has been developed using physical equations and also experimental data. Common Rail Injection (CRI) that is a flexible fuel injection system i...

ethanol as a renewable and alternative fuel when utilized in homogeneous charge compression ignition (hcci) has potential to substantially reduce nitrogen oxides (nox) and particle matter (pm) and can maintain hcci sustainability. hcci engine operation is limited between two ringing and misfire regions that too retard and advance combustion phasing highly affect hcci engine operation, performan...

The application of new technologies in the automotive field has highly improved the performances of internal combustion engines. In particular, applying electronic control to the fuel injection system has improved dynamic performances and reduced noxious emissions, noise and fuel consumption. To achieve this goal it is necessary to exactly meter the injected fuel by controlling both the injecti...

BACKGROUND: Environmental pollution causes a number of irreversible consequences, including those associated with climate warming, acid precipitation, deterioration climatic conditions and others. The problem reducing harmful emissions diesel engines containing in exhaust gases is currently relevant, as the implementation EURO 4/5/6 standards becoming increasingly difficult for both new automot...