What is the normal fuel rail pressure for the Audi A6L?

1 Answers
OliveLynn
07/29/25 12:28pm
A6LC6 model, if it is a gasoline direct injection engine, the low-pressure side fuel pressure is about 4bar at idle, and up to about 6bar during rapid acceleration. For the 2.0T engine, the fuel filter comes with a pressure regulator, and the rated maximum pressure is 6BAR. More information about the fuel pressure regulator is as follows: 1. Introduction: The fuel pressure regulator is a component that ensures normal fuel pressure in the car's fuel system. Inside the pressure regulator, there is a diaphragm that controls the opening and closing of the pressure valve. When the fuel pressure drops below a certain value, the pressure valve closes, and the fuel pump pressurizes to increase the pressure in the fuel line. When the pressure exceeds the specified value, the diaphragm opens, and the excess fuel flows back to the fuel tank through the return line, reducing the pressure. 2. Function: The function of the fuel pressure regulator is to adjust the fuel pressure entering the injector based on changes in the intake manifold pressure, maintaining a constant pressure difference between the two. This ensures that the amount of fuel injected from the injector depends solely on the injector's opening time, allowing the ECU to precisely control the fuel injection amount by adjusting the injection duration.
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