Fuel pump layout and EFI vehicle

Abstract

The invention provides a fuel pump arrangement structure and an electronic fuel injection vehicle. The fuel pump arrangement structure comprises a fuel pump located outside a fuel tank; the fuel pump is fixed to a vehicle frame and located in the area behind an engine cylinder block, above a crankcase body, in front of an air filter and near the crankcase body; the fuel pump is connected with the fuel tank through a fuel inlet pipe and a fuel return pipe and connected with a fuel sprayer of an engine through a fuel supply pipe. The upper portion of the fuel pump is shielded by the fuel tank, the lateral surface of the fuel pump is shielded by a covering part, and the lower portion of the fuel pump is shielded by the air filter, so that no protective cover is needed. Mud water splash is avoided, the work reliability of the fuel pump is improved, and the service life of the fuel pump is prolonged. The distance between two connectors at the fuel pump end and the fuel sprayer end of the engine is short, and the distance between a fuel inlet connecting nozzle of the fuel pump and a fuel outlet connecting nozzle of the fuel tank is short, so that the fuel supply pipe and the fuel inlet pipe can be short through design, and the cost is reduced.

Description

technical field [0001] The invention relates to engine fuel supply technology, in particular to an arrangement structure of a fuel pump and an electronic injection vehicle. Background technique [0002] Traditional EFI vehicles have a structure in which the fuel pump is built into the fuel tank to deliver the fuel in the fuel tank to the engine. This structure has the following disadvantages: the amount of residual oil in the fuel tank will increase more, resulting in a smaller effective capacity of the fuel tank; the accuracy of the joint between the fuel tank and the fuel pump is high, and the requirements for manufacturing quality control are high; the maintenance of the fuel pump Maintenance needs to be performed after disassembling the fuel tank, which is inconvenient; the outlet of the fuel pump is high-pressure fuel, and the engine is below the fuel pump. If it leaks, there will be safety hazards. Contents of the invention [0003] Based on this, it is necessary to...

AI Technical Summary

Problems solved by technology

This structure has the following disadvantages: the amount of residual oil in the fuel tank will increase more, resulting in a smaller effective capacity of the fuel tank; the accuracy of the joint between the fuel tank and the fuel pump is high, and the requirements for manufacturing quality control are high; the maintenance of the fuel pump Maintenance needs to be carried out after the fuel tank is disassembled, which is inconvenient; the outlet of the fuel pump is high-pressure fuel, and the engine is below the fuel pump. If it leaks, there will be a safety hazard

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