The fuel pump regulates the flow of fuel by adjusting both its pressure and volume delivered to the engine. The flow rates of fuel is measured in Liters per hour (LPH) and for a general auto mobile it should be like 90-255 LPH according to the engine size. The pump needs to deliver a stable fuel flow in order for the engine work efficiently, especially during events which require higher loads (such as full throttle and high RPM) where the pressure exerted on each injector demands that they need plenty of gasoline.
Fuel pumps work along with fuel pressure regulators to get the exact amount of psi between 30 and 60 PSI. The pump itself is powered by an electric motor and includes a round impeller or rotary vane that draws fuel through the lines toward it self, then feeds to the injectors. A system that is able to adjust how much fuel leaving the pump would be sent through each of those injectors, on the fly based solely upon what was happening in the engine itself. That is running at low speeds, the fuel demand will be small and so too will be what the pump supplies – when you’re constantly accelerating then more fuel getting through means that also increases its output.
How Efficient a Fuel Pump is, has Direct Effect on Engine Running Performance. A pump that delivers more fuel than is needed causes over-fueling, and this reduces not only economy but also makes emissions worse. Conversiomanip, too little fuel and the engine runs lean, making less power and risking harm. This is important as high-performance applications with fuel systems that are not dialed in correctly can result in a decrease of engine efficiency by up to 15 percent.
The fuel pump is controlled by an electronic control unit (ECU) in the case of high-performance vehicles, which turns it on and off based on input from various sensors – e.g. oxygen sensor, throttle position sensor etcetera — to vary the flow rate. A system like this also provides higher levels of accuracy, resulting in fuel being delivered to the engine as demanded regardless of conditions. Modern fuel pumps have also been constructed with energy saving in mind, cutting consumption by 5-10% which can help boost your MPG over an entire vehicle life.
If we look at how the fuel pump moves fuel, what question might arise. The answer is its pressure and volume control to deliver the right amount of fuel for power generated. More about fuel pump systems see Fuel Pump