Diesel Injector Fuel Injector 0445120145 Compatible With Bosch Cr/IPL26/Ziris20s

Effect of Double Injector on Combustion Process in a 396 Series Diesel Engine (part 2)

1  1Introduction

The 396 series diesel engine has been widely used in domestic ships, vehicles and industrial power units, etc., because the engine has the reliable performance, long service life, high power and economy and can be converted into utilizing alternative fuels such as natural gas.1-3.   With the increasing reduction of petroleum resources, the application of biodiesel and alcohol fuels (such as methanol and ethanol) in the diesel engine is increased.

As alcohol fuel is not miscible with diesel, the proportion of alcohol fuel in the mixed fuel of alcohol fuel and diesel is generally less than 10%. The mixed fuel has low stability, is easily layered and cannot be stored for a long time even with the addition of cosoluent.4-6 It is recommended to use alcohol fuel in the diesel engine by dual-injection. One method is to spray alcohol fuel in the intake manifold and spray diesel as ignition fuel in cylinder, and another method is to directly spray alcohol fuel and diesel into cylinder by different injectors, with diesel igniting alcohol fuel.

The fuel injection system of the original 396 series diesel engine was modified, and two identical 4-hole injectors were installed in each cylinder. Therefore, the diesel can be sprayed by two injectors, or one injector can be used to spray diesel and the other injector can be used to spray biodiesel or alcohol fuel.

A 3D combustion model of the 396 series diesel engine is established by using the computational fluid dynamics software FIRE, and the combustion process when uniform 5-hole and 8-hole injectors and 4-hole dual-injector were adopted was compared and analyzed by simulation method so as to improve the combustion process of the 396 series diesel engine with dual-injector as well as to provide a basis for using biodiesel and alcohol fuel in the future.7, 8.