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What is the working principle of the high-pressure fuel pump?
The high-pressure fuel pump is a key component in the automobile fuel system. Its main function is to suck the fuel from the fuel tank and press it into the fuel system through the fuel outlet. During the working process, the high-pressure fuel pump goes through three stages: suction stroke, return stroke and pump stroke.
The working principle of the high-pressure fuel pump:
The high-pressure fuel pump uses the rotating action of the rotor to suck the fuel from the fuel inlet and press it into the fuel system through the fuel outlet. In this process, the roller is pushed outward by centrifugal force to form a rotating oil seal to ensure the effective transmission of the fuel. When the oil pump is turned off, the check valve at the oil outlet will be closed to prevent the fuel from flowing back to the fuel tank, thereby maintaining the residual pressure in the fuel pipe. In addition, the maximum output pressure of the high-pressure fuel pump is regulated by the pressure limiter. Once the pressure exceeds the preset limit, the pressure limiter will start the bypass to return part of the fuel to the pump inlet to protect the system safety.
High-pressure fuel pump location:
The high-pressure fuel pump is usually located in the fuel system of a gasoline direct injection engine to provide high-pressure fuel to the injector. The specific location may vary depending on the vehicle model and engine type, but usually the high-pressure fuel pump is installed in one of the following locations:
Above the engine: The high-pressure fuel pump may be installed above the engine, usually near the cylinder head or cylinder block. This installation allows for easy connection to the injectors and also facilitates the supply and injection of fuel.
Side of the engine: Some vehicles have a high-pressure fuel pump installed on the side of the engine, usually on one side of the engine, near the cylinder head or cylinder block. This location saves space and also facilitates the supply and injection of fuel.
Near the fuel tank: In some vehicles, the high-pressure fuel pump may be installed near the fuel tank, usually at the bottom or rear of the vehicle. This location can reduce the length of the pipeline and improve the efficiency of fuel supply.
What are the symptoms of a damaged high-pressure fuel pump?
The high-pressure fuel pump is a very important component in the vehicle’s fuel system. If it fails, it will cause a series of serious performance problems in the vehicle. Among them, the most common symptoms of failure include severe shaking, weak acceleration, unstable idling, and poor starting. Sometimes the car will even stall. These symptoms are very similar to the symptoms of gasoline pump failure, but the failure of the high-pressure fuel pump is mechanical damage, blockage, oil leakage, etc. For direct injection engines, there are similarities between fuel pump failure and high-pressure fuel pump failure. If there is a phenomenon of weak acceleration and shaking, it can be detected step by step. But whether it is a gasoline pump or a high-pressure fuel pump failure, it is generally replaced as a whole. If you are not sure whether it is a gasoline pump or a high-pressure fuel pump that has a problem, you should check the gasoline pump first. If the pressure of the gasoline pump is sufficient, then check the high-pressure fuel pump. You can use a fuel pressure gauge to detect the output pressure of the gasoline pump and use the elimination method to determine where the fault is.
It should be noted that the high-pressure fuel pump is different from the electronically driven gasoline pump. It is purely mechanically driven (driven by the camshaft), so its fault symptoms are also different. If a fault occurs, it will cause the car to have symptoms such as weak acceleration, unstable idle speed, and poor starting, and even flameout. In order to ensure the normal operation of the car, it is necessary to check and replace the high-pressure fuel pump in time. At the same time, in order to avoid failure of the high-pressure fuel pump, you should choose good quality gasoline and avoid adding gasoline with more impurities. If a fault occurs, it needs to be repaired or replaced in time to ensure the normal operation of the car.
In short, the high-pressure fuel pump is a very important component in the automobile fuel system. If it fails, it will have a serious impact on the operation of the car. If there is a phenomenon of weak acceleration and shaking, it should be inspected and repaired in time to avoid more serious failures. At the same time, attention should be paid to the quality of gasoline and gasoline with a lot of impurities should be avoided to ensure the normal operation of the high-pressure fuel pump.
If you need to buy mini cooper high pressure fuel pump, OSIAS’s mini cooper high pressure fuel pump will be your satisfactory choice.
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Oliver is a professional blogger and a seasoned business and finance writer. With a passion for simplifying complex financial topics, he provides valuable insights to a diverse online audience. With four years of experience, Oliver has polished his skills as a finance blogger.
