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What is the principle of the fuel line assembly?

Views:10     Author:Site Editor     Publish Time: 2019-06-28      Origin:Site

The fuel line assembly is generally composed of a fuel pump, a fuel filter, a fuel injector, etc., and its function is to ensure the fuel flow required by the engine under various working conditions and conditions.


The fuel system undertakes fuel filling and transportation, which ensures that the fuel reaches the engine smoothly and is supplied to the engine. It is also responsible for collecting oil vapor and discharging it to the atmosphere through filtration. The principle of suction and desorption of the evaporation system is that the fuel in the fuel tank generates oil vapor due to changes in ambient temperature. When the steam pressure is greater than the set pressure of the system, the two-way valve of the system is opened, and the oil vapor enters the canister and is adsorbed by the activated carbon. When the internal pressure of the system is less than the set pressure, the two-way valve is opened, and the outside air is added to the system through the canister. When the engine is running, the ECU detects the opening condition of the canister cleaning valve, the canister cleaning valve is opened, and the fuel vapor is negative in the intake manifold. Under the action of pressure, enter the engine to participate in combustion.

IMG_20180425_182303 拷贝

The fuel line assembly consists of fuel filler caps, fuel filler pipes, fuel tanks, oil pumps, gasoline filters, charcoal tanks, canister cleaning valves, piping and other components.


The layout of the fuel line assembly has an important impact on the performance of the fuel system. A reasonable arrangement is equivalent to adding insurance to the system, and it is easy to pass national regulations without potential safety hazards. The fuel system layout generally follows the following principles:


1. Priority: After the fuel tank is placed, priority is given to the placement of components such as oil filters, canisters, and solenoid valves.

2. Interference: Fuel system components must not interfere with peripheral components and meet assembly, disassembly, and inspection requirements.

3. Insulation requirements: Fuel system components should be kept away from heat sources such as exhaust systems. If the heat source is too close, heat insulation should be added.


The novel fuel system utility model patent relates to a novel fuel system, characterized in that the fuel system comprises a main tank body and a sub-tank body, and a fueling exhaust pipe disposed between the main tank body and the sub-tank body, A stainless steel tube is further disposed between the main box body and the sub-tank body, and the two ends of the stainless steel tube are respectively connected to the main box body and the sub-box body through the connector assembly. The overall structure of the technical solution is ingenious and compact, and the technical solution is the largest. The limit utilizes the body space to meet the requirements of customers, and also provides more selectivity for the future development of the car.

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