Fuel Injection System

The development of the fuel injection system on motor gasoline today is growing rapidly. Conventional fuel systems becoming obsolete, and switch to fuel injection systems are more environmentally friendly and more efficient use of fuel.

1.    difference characteristics Injection System with System Carburetor

a.    On Gasoline Injection System

The amount of fuel   into the engine cylinders are determined based on many conditions, such as temperature and, engine speed, the amount of incoming air, the remaining oxygen in the exhaust gas.

b.    Carburetor Systems In Ordinary

The amount of fuel into the cylinder motor is only based on the level of vacuum in the entire air / venturi carburetor through therottle position control valve (gas valve)

2.    Principle Work Gasoline Fuel Injection System Mechanical

Gasoline is sprayed directly into the suction valve hole. Udarar and fuel occurred from the suction hole until the end of the intake stroke. The fuel is mixed with air in the form of fog as sprayed.

Spraying takes place continuously. Temperature bergatung motors work on the environmental conditions and loads, such as start when cold, stationary or when accelerated. Needs fuel mixture is controlled by the control unit. This system is called the K-Jetronik, which controls the amount of fuel supplied containing mechanical control. This later developed into a TO-Jetronik with the addition of ECU (electronic control unit) .

 









3.     Functions and Components How it Works

a.    Distributor serves as fuel graduated with an exact amount for each engine load conditions. The amount of fuel supplied is determined by the air flow sensor plate directly measure the amount of air flowing into the engine cylinders. The position of the sensor plate is placed in such a way related to plunjer fuel controller, then adjust the amount of fuel to be injected.
 

b.    Regulators Pressure

Pressure setting is obtained from the primary pressure through a barrier that serves to connect the circuits and the primary pressure regulator back and forth. Furthermore, also used slang that connects the fuel distributor with regulators required at engine heat.

c.    Valve Pressure Deferensial

Deferensial pressure valve is in the fuel distributor. This valve serves to keep the pressure in the gap unntuk graduated to keep it constant.

d.    Valve Start

This valve serves to spraying gasoline on the start time. The most widely used type is the type of solenoid. rolls are mounted directly in the electro magnetic valve. If the valves do not work the spring retaining cap electromagnetic armature to hold the bulkhead. This condition causes the valve to close. The valve opens when given an electrical charge.

e.    Thermo Switch

When the motor was hot fuel flow stopped because gasoline from start valve is only needed at the start. To stop the flow of fuel used thermo time switch ( a switch that works by changes in temperature) is used dwilogam type (bimetal) that is heated by electricity. Contact the opening and closing Sklar engine temperature and the flow of electrical current.

f.     Regulators Heaters

Regulator heating function serves to control the process of enriching the fuel mixture during engine warm. When the engine is cold, the pressure regulator will reduce engine temperature control to the extent specified. In this way the gap can be graduated to the injector open longer. By the time the machine is turned on in a cold state, some petrol still condense on the walls of the suction line. To replace the condensation, gasoline must be enriched during heated or according to the technical term.  
a.    adder Wind (Air)

When the engine is cold resistance to air flow that occurs in the larger airways than normal temperatures. To overcome these obstacles engine power output needs to be increased by increasing the amount of air that is channeled into the machine. If this is not done, the engine is not flat. Symptoms faltering engine and cause vibration, because dihasilkanya power was not enough to overcome these obstacles., To overcome this system, the addition of air (auxiliary water divice) mounted on the injection system and it generally works when the engine is cold.

b.    Circuit Electrical

Mechanical fuel injection system is equipped with a number of electrical components, such as gas stations, heating regulators, Overdrive air start valve and thermo-time switch. Electrical energy for each device is controlled by a relay. Pencatu relay functions as an electric current to the system.

c.    Gas Stations

Pumps are used are the electric gas pump, gasoline pump function of the tank to the fuel distributor.

d.     injector

Fuel injector squirts function continuously. This injector valve fitted as close as possible to reduce the heat that goes masuk.untuk dsari cylinder block then sealed with a ring injector O on the cylinder head.