Why Do You Need A Fuel Pump Pressure Regulator In Your Car Engine? The purpose of this device is to deliver the fuel to the fuel injectors at a constant pressure, which is usually around 40-60 psi according to the vehicle specifications. By helping the engine to have an optimal air-fuel ratio, it ensures a complete, combustive burn. The regulator functions with a diaphragm spring-loaded and managed from the engine vacuum to modulate the flow of fuel. The regulator lowers the pressure at idle when less fuel is needed, and raises it during acceleration to satisfy higher demand.
To achieve efficiency, a regulator is used to send the additional fuel back through the line to the tank by means of a return line which keeps pressure out of the fuel rail. Fuel pressure could vary and fuel performance i.e. poor gas mileage, chugging idle or stalling_DECREF It can also lead to additional emissions that is why regulators are so important on current emission control systems.
Fuel system diagnostics have proven that a defective pressure regulator can cause drops in pressure up to 20 percent of the nominal value, leading to considerable engine power loss. Fuel pressure regulators are commonly checked by auto experts who inspect rough idling or engine hesitation, especially in vehicles over 100,000 miles. While it sound worse than it is actually, the regulator got worn too, as do all parts over time in older vehicle.
It was not until the 1970s that strict emission standards saw the mass produced car apply its step into fuel pressure regulation. Therefore, fuel pressure regulators were designed to better regulate pressure and take some load off the fuel pump. These regulators have been updated by companies like Bosch and Delphi to enhance performance for your modern vehicle, which means that now perform better while being longer lasting and much more accuracy.
In the words of Henry Ford; “Coming together is a beginning; keeping together is progress; working together is success. This quote has relevance to how the fuel system parts need to sync up and in particular, a pressure regulator must function as a fulcrum for all that fuel flow. If the regulator goes out, some of the other parts that share work load with it such as a fuel pump may have to operate at a higher duty cycle, which in turn may shorten its life span. If the pressure regulator fails, this can cause additional strain on the pump that results in making its anticipated 100k-150k mile lifespan as a pump reduced by up to ~25%.
To gain some further knowledge about the role of a fuel pump, with its pressure regulator in relation to better engine performance then please click on the link Fuel Pump for more information.