HOW TO SET UP AND MAINTAIN DIESEL ENGINE FUEL SYSTEM

Diesel Engine Fuel System - Hello automotive friends, in this article we will share information about the automotive world. This article discusses the diesel engine fuel system. You can see also posts about gasoline engine fuel systems here.

Combustion in the cylinder chamber occurs by spraying a certain amount of fuel against the high-temperature air.

Complete fuel injection is made possible by an injector positioned with its mouth facing into the cylinder combustion chamber. High temperature air is produced by the movement of the piston in the compression step so that at a certain pressure limit, self-ignition occurs, and a sudden combustion takes place.

So, in a diesel engine, there is no need for external spark plugs in a gasoline engine. Therefore the diesel engine fuel system functions as an ignition system.

Diesel fuel consists of petroleum fluids with different viscosities, specific gravity, and combustion qualities from gasoline. For high speed engines, "kerosene" is usually used, which is a type of oil that is closer to the quality of gasoline, while low-speed machines use "diesel" or similar kerosene.

1. Adjustment of Diesel Engine Fuel System

To get complete combustion in the cylinder combustion chamber, two things are needed, namely the fuel injection pressure from the nozzle and the compressed air pressure in the cylinder combustion chamber which is high enough according to certain pressure limits in accordance with the engine manufacturer's specifications. Usually, the injection pressure is around (180 bar - 350 bar) or (a8 Mpa - 35 Mpa) and the compression pressure is between (30 bar - 55 bar) or (3 Mpa - 5.5 Mpa). The construction of the fuel pressure pump of various types allows it to produce a high pressure where the the pressure is transmitted by the injector to adjustable spray pressure.

The fogging is regulated by turning the "adjusting screw" contained in the fogging device itself, the parts of which are:

a. fogging body

b. mist mouth

c. atomizer needle

d. mist rod

e. spring

f. adjusting bolt

g. hardening nut

h. channel press

i. excess oil drain

j. leak bolt

Almost all of the control and control of the engine is centered on the fuel suppressor pump. The composition of the components consists of:

a. Fuel inlet pipe into the pump.

b. The liver regulates the amount of fuel pumping into the injector which regulates the rotation speed and stopping of the engine.

c. The "when fogging" or timing engine starts up.

d. Lubricating oil fill hole plug.

e. Centrifugal regulator (governor) which functions to even out the engine speed at various speeds. If this part is damaged the engine speed will go up or down irregularly.

f. Lever for the pedal to control the engine rotation speed.

g. Governor moves continuation lever.

h. Camshaft drives plunger pump.

i. An adjustable connecting device (clutch) to connect the pump to the engine crankshaft rotation.

j. Pump elements.

k. Bleed screw.

The camshaft of the pump is rotated by the engine crankshaft by means of a gear or a chain of gears whose installation can also be arranged like a timing chain on a gasoline engine.

The engine is stopped by moving a lever that stops fueling the pump, as opposed to increasing the engine speed.

2. Maintenance of Diesel Engine Fuel Systems

The use of diesel engines requires constant attention and maintenance. At a certain time, it needs to be checked, repaired, and readjusted. What must be done is:

a. Every day:

* The state of the fuel filter.

* Atomizer working conditions.

* Lubricating oil in the crankcase.

* Valve mechanical equipment.

b. Every week:

* Lubrication in the injection pump.

* Spray pressure atomizer.

* Lubricating oil filter and fuel filter.

c. Each month:

* Gap-free adjustment of inlet and exhaust valves.

* Cleaning and adjustment of the misting tool.

* Cleaning the air filter and changing the lubricating oil.

* Repair of fuel line connections.

d. Every six months:

* Cleaning of oil pans and lubrication lines.

* Removing the cylinder head, cleaning the combustion chamber, and valves.

* Gear and valve timing chain are readjusted.

* Timing ignition (ignition) on the fuel suppressor pump readjusted.

* The nut screw fixing the rotating bearing/crankshaft is hardened and adjusted.

* The cooling water is cleaned.

e. Every year:

* Disassembly and repair of machines.

* Cleaning of the combustion chamber and exhaust (exhaust manifold)

* Replacement and fitting of rotating bearing layers.

* Torak and piston rings.