Gauss

Today we are going to talk a little about the high pressure pump in the vehicle's direct injection system.

But first to understand, let's talk about what a direct injection system is.

The direct and indirect injection system.
The direct injection system is a system that injects fuel into the combustion chamber of the cylinders.

direct injection
Very different from the indirect injection system, which works in the intake manifold and outside the combustion chamber.

direct injection system
In engines with direct injection, the fuel is injected in the last compression stage, forming the mixture quickly. The distance between the injection nozzle and the spark plug is small, and they are located between the valves, at the top of the cylinders.

direct injection system
But what are the advantages of direct injection?
It increases engine efficiency and power, along with fuel economy.

However, we have some disadvantages too.
An example is when the intake valves accumulate carbon, as there is no fuel flow to “clean” them, unlike indirect injection, which allows fuel to pass through the valves and does not allow carbon to accumulate.

carbon intake valve
And the high pressure pump, what is its function in this system?
Well, its main function is to raise the pressure coming from the fuel pump, or also known as the “lower pump”, which is located inside the fuel tank.

high pressure pump in the injection system
As soon as the fuel is pulled from the tank by the low pressure pump, it passes through the filter and a pressure sensor, reaching the high pressure pump, where it can be activated directly via the valve control cam.

From this moment on, the high pressure pump raises the fuel pressure depending on the development of the vehicle, which can vary between 150 and 300 Bar, all through an electronic regulator.

These values ​​are calculated by the central unit, which ultimately directs this fuel to the Common Rail (a single tube that distributes it to all nozzles, with the same pressure and flow rate).

high pressure pump in the injection system

And pay attention! A very important detail!
Before moving the high pressure pump, use the Scanner to depressurize the line and avoid accidents.

high pressure pump function
The high pressure pump is a crucial component for the operation of the vehicle's injection system (Attention: not all vehicles have this component in their system), so be careful with fuels of dubious origin, always choose a gas station you trust, in addition to always keeping the vehicle up to date with inspections and care.

And always remember, vehicles are complex machines that depend on the full functioning of the entire system, so the smallest of defects can compromise the entire set.

If you have questions and want to know more about our high pressure pumps, send us a message, our team is always at your disposal.

Telephone: +55 (41) 3021-2300

WhatsApp: +55 (41) 98836-4621

Email: support01@gauss.com.br

Discover our portfolio of high pressure pumps here, there are several models for different manufacturers in the Brazilian and imported markets.