2nd Hand Fuel Injector 4D31 6D31 , Engine Fuel Injector For Excavator HD512 SK230-6E

Specification

Description

What are Fuel Injectors?
Fuel injectors are parts of modern car engines that deliver fuel to the engine’s combustion chamber, directly or indirectly. These small electro-mechanical devices are typically positioned at a certain angle to make sure the fuel is sprayed towards the engine’s inlet valve or directly into the cylinder.

How Does a Mechanical Fuel Injector Work?

A lot of folks confuse a mechanical fuel injection system with a carburetor. While the principle is fundamentally similar, there is a major difference in the type of fuel delivered to the engine. Whereas carburetor systems deliver low pressure fuel from the gas tank, a mechanical fuel injector delivers high pressure fuel to an accumulator. You can think of this as a temporary storage area for your fuel. The fuel then passes through a distributor which is typically considered as the metering control unit of the system. From here, the fuel is then ‘distributed’ into each cylinder in the correct amount and at the correct time.

fuel injectors

The flow of fuel that is injected into the inlet port is managed by the flap valve which is located in the air intake of the engine since air and fuel must be mixed first prior to entry into the cylinder. As you accelerate, the flap valve opens to increase the amount of air flowing through it. This also stimulates the fuel distributor to increase the amount of fuel pushed through the injector to maintain the right balance of air and fuel.

If fuel is not squirted into the inlet port, the valve inside the fuel injector remains closed by virtue of the tension on its spring mechanism. When fuel is sent to mix with air at the air inlet, the pressure of the fuel opens this valve to allow fuel to be squirted. This is the reason why they call mechanical fuel injectors to be spring-loaded injectors.