CN207245901U - A kind of low pressure fuel system exhaust structure - Google Patents

Abstract

It the utility model is related to automotive oil system field, and in particular to a kind of low pressure fuel system exhaust structure.Including bonnet, guide plate, spool body sealing ring, valve core spring, valve core rod, valve core case, rubber seal, integrated ring joint body, valve core case lower part loads in integrated ring joint body and rubber seal is arranged between the two, valve core case and ring fittings, valve core rod and valve core spring are in valve core case, spool body sealing ring is housed on valve core rod, valve core spring is pressed in the valve core rod with spool body sealing ring on valve core case, guide plate is additionally provided with valve core case, valve core rod passes through guide plate, bonnet is stamped on valve core case top, there is a punching shaft on bonnet.The utility model overcomes the defects of grinding particle contamination, bolt stripped thread, diesel fuel filter arrangement of parts limited space of existing filter bleeder screw design, and only needs hand operation, and with good airproof performance, cleannes are high, space limitation is small, easy to operate.

Description

A kind of low pressure fuel system exhaust structure

Technical field

It the utility model is related to automotive oil system field, and in particular to a kind of low pressure fuel system exhaust structure.

Background technology

Low pressure oil way zero is replaced in the low pressure oil way part just filled such as oil pipe, filter, or vehicle after-sales service maintenance During part, the phenomenon of air bulk deposition in low pressure oil way often occurs, be easy to cause engine misses, or light a fire not smooth The problems such as, so how to be emptied to the air of low pressure oil way.Existing country's mainstream solves the main side of air in low pressure oil way Case is that one bleeder screw of design, its operation principle are in the oil discharge passage of diesel fuel filter installation pedestal：Spanner is used first Bleeder screw is pulled open, then by the manual pump of continuous extrusion negative pressure system or starts the low pressure fuel pump of positive pressure system by liquid Fuel oil is pumped to filter from fuel tank.The air cemented out in diesel fuel filter by liquid fuel can be from bleeder screw and bavin Overflowed in the gap of oil rectifier installation pedestal, when observing that liquid fuel is overflowed, illustrate the air in low-voltage fuel pipeline Discharge substantially, stop pump oil operation at this time, tighten bleeder screw.This scheme can solve the problems, such as emptying substantially, but its With following five point defect：1st, since bleeder screw is designed in diesel fuel filter installation pedestal oil discharge passage, its thread grinding fortune Metal removal particle caused by dynamic can pollute the fuel oil totally held, and be easy to cause the risk of high-pressure oil pump wear out failure；2nd, put Such as there is stripped thread phenomenon in gas bolt, be easy to cause the risk that low pressure oil way leaks air；3rd, due to needing the indoor instrument such as spanner It can be operated, so during layout design, need to consider Wrench operating space, so the diesel fuel filter of integrated bleeder screw Position has certain limitation；4th, the operation of bleeder screw is relatively complicated and particular tool could be operated.5、 The air in filter to high-pressure oil pump this depot siding can not be discharged, extends and starts the time.

The defects of to overcome existing emptying scheme, this patent spy have invented a kind of low pressure fuel system air bleeding valve, not only gram Grinding particle contamination, bolt stripped thread, the diesel fuel filter arrangement of parts limited space of existing filter bleeder screw design are taken The defects of, and hand operation is only needed completely, without borrowing any special tool(s), there is good airproof performance, cleannes height, space limit Make the advantages that small, easy to operate.

Utility model content

The purpose of this utility model is that solve the above problems, there is provided a kind of low pressure fuel system exhaust structure.

In order to realize the purpose of this utility model, the technical solution adopted in the utility model is：

A kind of low pressure fuel system exhaust structure, including bonnet, guide plate, spool body sealing ring, valve core spring, spool Bar, valve core case, rubber seal, integrated ring joint body, valve core case lower part loads in integrated ring joint body and rubber Sealing ring is arranged between the two, and valve core case and ring fittings, valve core rod and valve core spring are in valve core case, valve core rod Upper that spool body sealing ring is housed, valve core spring is pressed in the valve core rod with spool body sealing ring on valve core case, in valve core case also Equipped with guide plate, valve core rod passes through guide plate, and bonnet is stamped on valve core case top, has a punching shaft on bonnet.

The beneficial effects of the utility model are：Overcome the design of existing filter bleeder screw grinding particle contamination, The defects of bolt stripped thread, diesel fuel filter arrangement of parts limited space, and hand operation is only needed completely, without borrowing any spy Different instrument, with good airproof performance, cleannes are high, space limitation is small, easy to operate.

Brief description of the drawings

Fig. 1 is the utility model structure diagram,

Fig. 2 is installed on fuel pipe schematic diagram for the utility model.

Embodiment

The utility model is further illustrated with reference to the accompanying drawings and examples：

Embodiment：Referring to Fig. 1, Fig. 2.

A kind of low pressure fuel system exhaust structure, including bonnet 1, guide plate 2, spool body sealing ring 3, valve core spring 4 , valve core rod 5, valve core case 6, rubber seal 7, integrated ring joint body 8,6 lower part of valve core case loads integrated ring connector sheet In body 8 and rubber seal 7 is arranged between the two, and valve core case 6 is connected with ring connector 9, and valve core rod 5 and valve core spring 4 are equal In valve core case 6, spool body sealing ring 3 is housed, valve core spring 4 is the valve core rod 5 with spool body sealing ring 3 on valve core rod 5 It is pressed on valve core case 6, guide plate 2 is additionally provided with valve core case 6, valve core rod 5 passes through guide plate 2, and bonnet is stamped on 6 top of valve core case 1, there is a punching shaft on bonnet 1.

The utility model operating instruction：Bonnet 1 is turned on manually, is put aside；Ignition switch is turned to ON grades, to being built in Low pressure fuel pump power supply in fuel tank, makes it work together；Bonnet 1 is inverted, is gently squeezed valve core rod 5 using top bump head Pressure, when pressure is more than certain valve core rod working value（≥10N）When, it is downward that valve core rod 5 overcomes elastic force caused by valve core spring 4 Movement, at this time, the spool body sealing ring 3 on valve core rod 5 can be away from valve core case 6, and the gas cemented out by liquid fuel can To be overflowed from the gap of spool body sealing ring 3 and valve core case 6, reach the effect of exhaust；The pressure to valve core rod 5 is kept, until Untill the fuel oil for having liquid overflows, the extruding to valve core rod 5 is unclamped, valve core rod 5 can be under the action of valve core spring 4 upwards at this time Move, the spool body sealing ring 3 on valve core rod 5 keeps sealing untill returning to initially with valve core case 6；Bonnet 1 is tightened, completes emptying Work.At this time, it is possible to start engine.Rubber seal 7 ensure that valve core case 6 and integrated ring joint body 8 are complete Sealing.Valve core rod 5, valve core spring 4, valve core case 6 and spool body sealing ring 3 form valve body sealing structure.Guide plate 2 and valve core case Valve core rod 5 is constrained in vertical direction by 6 jointly to move up and down, and the main function of bonnet 1 is dust-proof, this exhaust structure passes through Ring connector 9 is connected with low-voltage fuel pipe 10.

What the embodiment of the utility model was announced is preferred embodiment, but is not limited thereto, the common skill of this area Art personnel, easily according to above-described embodiment, understand the spirit of the utility model, and make different amplification and change, but as long as The spirit of the utility model is not departed from, it is all within the protection scope of the present utility model.

Claims (1)

1. A kind of 1. low pressure fuel system exhaust structure, it is characterised in that：Including bonnet, guide plate, spool body sealing ring, spool Spring, valve core rod, valve core case, rubber seal, integrated ring joint body, valve core case lower part load integrated ring connector sheet In vivo and rubber seal is arranged between the two, and valve core case and ring fittings, valve core rod and valve core spring are in spool In seat, spool body sealing ring being housed on valve core rod, valve core spring is pressed in the valve core rod with spool body sealing ring on valve core case, Guide plate is additionally provided with valve core case, valve core rod passes through guide plate, and bonnet is stamped on valve core case top, has a punching shaft on bonnet.