Diesel Injector Fuel Injector 0445110064 Bosch for Hyundaiaccent 1.5 Crdi, 57/60 Kw, 01.02-03.06accent Hatchback 1.5 Crdi, 57/60 Kw, 01.02-03.06elantra 2.0 Crdi

Design and analysis of multi fuel injector (part 7)

2.2.1. Spring. This is the most important component of the injector as it defines its capacity. If the spring very stiff, then higher pressure will be required to allow the fuel through the injector. A powerful pump will be required to pump the fuel to the injector. The design was carried out using the standard design data book. [9] and the research work is done by Sai et al. [10]. The designed multifuel injector is based on the spring design, which consists of fuel delivery by means of a small compression produced by the spindle in the spring.The spring is an open-end type with the outer diameter (D) as 4.8 mm and coil diameter (d) as 0.8 mm. The initial pressure is 5 bar. Spring stiffness for the injector was calculated using the outer diameter of the spring and the force acting on the spring using the following formula.

2.2.3. Spindle. The spindle design is based on the dimensions obtained from the spring design. The diameter of the spring and that of the spindle are the same. The spindle is electromagnetic due to its connection with the copper coil. Hence, the spindle movement can be controlled using the Electronic Control Unit (ECU).

2.2.4. Nozzle. The nozzle plays a major role in the fuel atomization. The various types of nozzles are the single hole, multi-hole, pintle, and pintaux nozzles. The Pintle nozzle type is selected, and the material is maraging steel. This part of the injector will be directly exposed to the combustion chamber of the equipment.

2.2.5. Solenoid Coil. The solenoid coil is made of copper, which is wound on the spindle. When the coil is activated, the plunger is attracted to the coil against the spring force, thereby opening the hole of the injector, which is always in closed condition by the injector nozzle.