Fuel switch

Abstract

The invention provides a fuel switch of a fuel tank for an internal-combustion engine. The fuel switch comprises a switch body, a switch component, a oil-charging component, a fixedly-connected flange, an oil-gas separator, a fuel fine filter filtration core and a fine filtration oil cup, and is characterized in that: the oil-gas separator and the body of the switch are integrated into a whole, and are positioned above the fuel fine filter filtration core; and the width of an inner cavity of the oil-gas separator is no less than 10mm, the height is no less than 20mm and the length is no less than 25mm.

Description

technical field [0001] The invention relates to a fuel tank for an internal combustion engine, in particular to a fuel tank for a spark ignition internal combustion engine which is mounted on a vehicle such as a motorcycle or a power device and adopts a fuel injection system for fuel supply. Background technique [0002] The use of fuel injection system for spark ignition internal combustion engine is an effective solution to reduce harmful exhaust emissions and fuel consumption of automobiles, motorcycles, general power machinery, etc., and to improve starting and driving (operating) performance. The reliable operation of the system is greatly affected by the fuel vapor (air bubbles) inside the oil circuit. If the air bubbles accumulate too much, it may cause air resistance such as interruption of fuel supply. Therefore, how to eliminate the air bubbles in the oil circuit is an important issue. Fuel vapor (air bubbles) inside the oil circuit will be generated due to residu...

AI Technical Summary

Problems solved by technology

However, the problem of air bubble removal and fuel filtration in the low-pressure oil circuit of this system has not been completely solved.

Chinese patent ZL2003201245906 discloses a solution for removing air bubbles, but it is difficult to arrange on the car, and if a fuel fine filter is installed, the air bubbles between the fuel switch and the fuel fine filter cannot be discharged; Chinese patent ZL200520100319.8 discloses another A fuel switch and air bubble removal scheme, but the position of the oil-air separator is low, which is difficult to apply to the occasion where the fuel injector is installed at a high position. At the same time, because the air bubbles between the fuel switch and the fuel fine filter cannot be discharged, it is also impossible Set the fuel fine filter; Chinese patent ZL200820081930.4 discloses another air-oil separator air bubble solution, but because the oil-air separator and the fuel switch are completely independent and must be welded together or installed on the same side of the fuel tank, resulting in fuel tank The changes are large, the manufacturability is not good, and it is also difficult to install a high-performance fuel fine filter; Chinese patent application ZL200810059700.2 discloses an oil-gas separation device that can be equipped with a high-performance fuel fine filter, but the fuel switch and the reserve fuel function

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