CN202789254U - External fuel pump for motorcycle - Google Patents
External fuel pump for motorcycle Download PDFInfo
- Publication number
- CN202789254U CN202789254U CN 201220522987 CN201220522987U CN202789254U CN 202789254 U CN202789254 U CN 202789254U CN 201220522987 CN201220522987 CN 201220522987 CN 201220522987 U CN201220522987 U CN 201220522987U CN 202789254 U CN202789254 U CN 202789254U
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- valve
- pressure
- piston
- cavity
- automobile
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Abstract
The utility model relates to an external fuel pump for a motorcycle. The external fuel pump for the motorcycle comprises a pump body which is internally provided with a piston sleeve and a piston sliding in the piston sleeve. The piston is connected with a driving mechanism which makes the piston to move linearly in a reciprocal manner. A first check valve is installed at the top end of the piston. A first cavity is arranged at the lower end of the first check valve in the piston, and a second cavity is arranged at the upper end of the first check valve in the piston sleeve. The first cavity is communicated with an oil storage cavity which is communicated with an oil delivery pipe of an oil tank. The pump body is internally provided with a second check valve, a pressure constant valve and a pressure adjusting mechanism sequentially at the upper end of the second cavity. A pressure storage cavity is reserved between the second check valve and the pressure constant valve. The pressure constant valve comprises a valve body and a valve core. The upper end of the valve core leans against the inner wall of the valve body. An elastic film is installed between the valve body and the bump body and moves with the valve body synchronously. The valve core is connected with a first spring. The external fuel pump for the motorcycle provided by the utility model has the advantages that air resistance is avoided and oil is supplied continuously and stably.
Description
Technical field
The utility model relates to a kind of motor fuel injection pump for automobile.
Background technique
In the middle of people's life, the traffic tool are requisite in the daily life.Motorcycle is subjected to the both urban and rural residents's welcome deeply as a kind of cheap, easily traffic tool that travel, in the middle of daily life, and being in great demand of motorcycle.Along with country to motorcycle emission by the closing on of state's IV standard Deadline, each Motorcycle Manufacturers is in the urgent need to the supporting fuel pump of research and development and electric injection fuel system, replacing Carburetor, thereby meets discharging standards.
Traditional motor fuel injection pump for automobile can be divided into external (online) and built-in according to modes of emplacement, and the built-in motorcycle electric fuel pump will being installed on metal or the plastic stent assembly places in the fuel tank again, so that inconvenient maintenance.And external is under the hot high-temperature condition in sky, because the fuel oil boiling point is lower, and the pipeline road diameter is smaller, fuel oil is vaporization generation gas in pipeline road easily, gas can produce resistance to the conveying of fuel oil, form air-resistance phenomenon, and air-resistance phenomenon can make the conveying of fuel oil produce to be interrupted, the running efficiency of motorcycle is had a negative impact.In addition, existing motor fuel injection pump for automobile is by the motor driving vane rotary mostly, gets rid of isopyknic capacity with vane rotary and extracts fuel oil, and this structure is large not to the extraction discharge pressure of fuel oil, this discharge pressure can not overcome the gas that air-resistance phenomenon occurs, so its structure haves much room for improvement.
The model utility content
The problems referred to above that exist in order to solve existing motor fuel injection pump for automobile, the utility model provide a kind of fuel oil to extract discharge pressure greatly, can not produce air-resistance phenomenon, the continual and steady external motor fuel injection pump for automobile of fuel feeding.
The utility model adopts following technological scheme:
External motor fuel injection pump for automobile, comprise the pump housing, be provided with piston sleeve in the pump housing, slide the piston in piston sleeve, described piston connects the driving mechanism that makes its linear reciprocating motion, described piston tip is equipped with the first one-way valve, is provided with the first cavity in the lower end of the first one-way valve in the described piston, is provided with the second cavity in the upper end of the first one-way valve in the described piston sleeve, described the first cavity is communicated with shoe cream room, and described shoe cream room is communicated with the transport pipe of fuel tank; In the upper end of the second cavity the second one-way valve, constant pressure valve, pressure-regulating device are housed successively in the described pump housing, leave storage between described the second one-way valve and the constant pressure valve and press the chamber, described constant pressure valve comprises valve body, spool, described spool upper end offsets with the inwall of valve body, between described valve body and the pump housing flexible sheet is housed, described flexible sheet and valve body are synchronized with the movement, described spool connects the first spring, described pressure-regulating device is opened described spool pressure release in constant pressure valve rising situation, until storage presses the pressure decreased in chamber to the setting pressure of pressure-regulating device.
Further, described pressure-regulating device comprises the regulator bolts that is threaded in the pump housing, and the lower end of regulator bolts has the spool that pushes described constant pressure valve opens valve port, and then makes storage press the part that pushes of chamber pressure release.
Further, described driving mechanism comprises electric rotating machine and the driving mechanism that rotatablely moving of electric rotating machine is converted into linear reciprocating motion.
Further, be connected with the second spring between the valve body of described constant pressure valve and the pump housing.Under the effect of the second spring, valve body slowly rises or descends, and has avoided storage to press cavity pressure to change the lofty motion of lower valve body.
Preferably, be provided with the 3rd one-way valve between described shoe cream room and the transport pipe.
Preferably, described the first one-way valve and the second one-way valve are ball valve.
Preferably, described driving mechanism comprises the capacity eccentric bearing that is driven by described electric rotating machine, and this capacity eccentric bearing drives described piston linear reciprocating motion.
Preferably, described the first spring is the Compress Spring that is positioned at described spool bottom.The effect of this Compress Spring is that the spool of constant pressure valve and valve body are risen synchronously, until the part that pushes of spool and regulator bolts lower end is conflicted.
Preferably, the described part that pushes is the projection that is arranged on the regulator bolts lower end.
Preferably, the spool of described constant pressure valve is spheroid.
Technical conceive of the present utility model is: the driving mechanism driven plunger does reciprocating linear motion, when piston moves downward, air pressure in the second cavity reduces, air pressure in the first cavity is higher than the air pressure in the second cavity, so the spool of the first one-way valve rises, the valve port of the first one-way valve is opened, the second cavity and the first cavity consist of path, because the first cavity communicates with shoe cream room, and then the second cavity also communicates with shoe cream room, and the interior air of shoe cream room enters in the second cavity, when piston moves upward, the second cavity internal air pressure raises, and the valve port of the first one-way valve is closed, and the gas of the second cavity is pressed in the storage pressure chamber through the second one-way valve of its upper end.The first one-way valve was opened once again when piston moved downward again, equally the shoe cream room air is brought in the second cavity, once again air being pressed into storage when piston moves upward again presses in the chamber, the continuous to-and-fro motion that piston goes round and begins again, the shoe cream room air is run off form negative pressure of vacuum, fuel oil enters rapidly the vacancy that fills a vacuum in the shoe cream room, and like this, fuel oil replaces air and enters storage pressure chamber.
Pressing air or fuel oil in the chamber when storage increases, when storage presses cavity pressure to be higher than the constant pressure of regulator bolts setting, storage presses air or the fuel oil in the chamber to promote the valve body that the constant pressure valve of upper end, chamber is pressed in storage, under the effect of the first spring, the spool of constant pressure valve together moves upward with valve body, and flexible sheet raises up owing to supercharging changes the position.The constant pressure valve moves upward until regulator bolts pushes its spool, the valve port of constant pressure valve is opened, the constant pressure valve begins pressure release, after pressure release finishes, storage presses the pressure in the chamber to reduce to make the flexible sheet resilience, the valve body that flexible sheet drives the constant pressure valve moves downward, because the spool of constant pressure valve upper end offsets with the inwall of valve body, valve body band movable valve plug moves downward in the lump, until storage presses the pressure decreased in chamber to the setting pressure of pressure-regulating device, valve body and the spool of constant pressure valve are kept in the center, and pressure is again constant.That summarizes says, when storage pressed cavity pressure to be higher than the setting pressure of regulator bolts, the valve port of constant pressure valve is opened the discharge excess pressure made storage press the pressure in the chamber to keep constant.
The beneficial effects of the utility model are: (1) piston structure makes the discharge pressure of fuel oil in the fuel pump larger, the conveying negative pressure that forms also can overcome greatly the vapour lock pressure in the low-pressure oil delivery pipe road, like this, can not produce gas in the pipeline road, the conveying of fuel oil can not produce interruption, and fuel oil can be input in the oil sprayer continually and steadily, endlessly; (2) this fuel pump can be directly installed on the motorcycle engine, and the fuel oil delivery side of pump directly connects oil sprayer, has saved the high-pressure connecting pipe road between fuel pump and the oil sprayer, and motor, fuel pump, oil sprayer form integrative-structure, compact structure; (3) fuel pipe adopts low pressure oil supply, has overcome built-in fuel pump with high-pressure oil feed, defective that the pipeline pressure-bearing is high; (4) the external fuel oil pump keeps in repair easily with respect to the integral heat emission better effects if; (5) can replace Carburetor, need not to change other devices.
Description of drawings
Fig. 1 is the utility model embodiment's structural representation.
Embodiment
The utility model is described in further detail below in conjunction with accompanying drawing.
With reference to Fig. 1: external motor fuel injection pump for automobile, comprise the pump housing 9, be provided with piston sleeve 3 in the pump housing 9, slide the piston 6 in piston sleeve 3, described piston 6 connects the driving mechanism 1 that makes its linear reciprocating motion, the first one-way valve 7 is equipped with on described piston 6 tops, described piston 6 interior first cavitys 61 that are provided with in the lower end of the first one-way valve 7, described piston sleeve 3 interior second cavitys 31 that are provided with in the upper end of the first one-way valve 7, described the first cavity 61 is communicated with shoe cream room 2, described shoe cream room 2 is communicated with the transport pipe of fuel tank, is provided with the 3rd one-way valve between shoe cream room 2 and the transport pipe; In the upper end of the second cavity 31 the second one-way valve 4, constant pressure valve 10, pressure-regulating device 11 are housed successively in the described pump housing 9, leave storage between described the second one-way valve 4 and the constant pressure valve 10 and press chamber 8, described constant pressure valve 10 comprises valve body 101, spool 102, the inwall of described spool 102 upper ends and valve body 101 offsets, between described valve body 101 and the pump housing 9 flexible sheet 5 is housed, described flexible sheet 5 is synchronized with the movement with valve body 101, and described spool 102 connects the first spring 12.Described pressure-regulating device 11 is opened described spool 102 pressure releases in constant pressure valve rising situation, until storage presses the air pressure in chamber 8 to be reduced to the setting pressure of pressure-regulating device 11.Described the first spring 12 is for being positioned at the Compress Spring of described spool 102 bottoms.Also be connected with the second spring 13 between the valve body 101 of described constant pressure valve 10 and the pump housing 9, under the effect of the second spring 13, valve body 101 slowly rises or descends, and has avoided storage to press chamber 8 pressure to change the lofty motion of lower valve body.
Described pressure-regulating device 11 comprises the regulator bolts that is threaded in the pump housing, and the lower end of regulator bolts has the spool that pushes described constant pressure valve opens valve port, so make that storage presses chamber 8 pressure releases push part 111.In the present embodiment, the described part 111 that pushes is for being arranged on the projection of regulator bolts lower end.By the rotation regulator bolts, can preset the pressure that chamber 8 is pressed in storage.
In the present embodiment, the spool 102 of described constant pressure valve 10 is spheroid.Concrete, the spool 102 of described constant pressure valve is embedded in valve body 101, and valve body 101 upper ends have one and supply the described opening that part 111 moves up and down that pushes, and spool 102 is positioned at the lower end of this opening, and the diameter of described opening is less than the diameter of spool 102.Like this, the inwall of described spool 102 upper ends and valve body 101 offsets, and valve body 101 can be with movable valve plug 102 together to descend, under the effect of spool 102 bottoms the first spring 12, spool 102 also can together rise with valve body 101, until spool 102 is conflicted with the part 111 that pushes of regulator bolts.
Described driving mechanism 1 comprises electric rotating machine and the driving mechanism that rotatablely moving of electric rotating machine is converted into linear reciprocating motion.In the present embodiment, described driving mechanism comprises the capacity eccentric bearing that is driven by described electric rotating machine, and this capacity eccentric bearing connects described piston by a connecting rod.Described driving mechanism can also be other driving mechanisms that rotatablely moving of electric rotating machine are converted into linear reciprocating motion.
In the present embodiment, described the first one-way valve 7 and the second one-way valve 4 are ball valve.
The working principle of present embodiment is: driving mechanism driven plunger 6 does reciprocating linear motion, when piston 6 moves downward, air pressure in the second cavity 31 reduces, air pressure in the first cavity 61 is higher than the air pressure in the second cavity 31, so the spool of the first one-way valve 7 rises, the valve port of the first one-way valve 7 is opened, the second cavity 31 and the first cavity 61 consist of path, because the first cavity 61 communicates with shoe cream room 2, and then second cavity 31 also communicate with shoe cream room 2, air in the shoe cream room 2 enters in the second cavity 31, when piston 6 moves upward, the second cavity 31 internal air pressures raise, and the valve port of the first one-way valve 7 is closed, and the gas of the second cavity 31 is pressed in the storage pressure chamber through the second one-way valve 4 of its upper end.The first one-way valve 7 was opened once again when piston 6 moved downward again, equally shoe cream room 2 air are brought in the second cavity 31, once again air being pressed into storage when piston 6 moves upward again presses in the chamber 2, the continuous to-and-fro motion that piston 6 goes round and begins again, shoe cream room 2 air are run off form negative pressure of vacuum, fuel oil enters rapidly the vacancy that fills a vacuum in the shoe cream room 2, and like this, fuel oil replaces air and enters storage pressure chamber 2.
Pressing air or fuel oil in the chamber 8 when storage increases, when storage presses chamber 8 internal pressures to be higher than the constant pressure of regulator bolts setting, storage presses air or the fuel oil in the chamber 8 to promote the valve body 101 that the constant pressure valve 10 of 8 upper ends, chamber is pressed in storage, under the effect of the first spring 12, the spool 102 of constant pressure valve 10 together moves upward with valve body 101, and flexible sheet 5 raises up owing to supercharging changes the position.Constant pressure valve 10 moves upward until regulator bolts pushes its spool 102, the valve port of constant pressure valve 10 is opened, the 10 beginning pressure releases of constant pressure valve, after pressure release finishes, storage presses the pressure in the chamber 8 to reduce to make flexible sheet 5 resiliences, the valve body 101 that flexible sheet 5 drives constant pressure valve 10 moves downward, because spool 102 upper ends of constant pressure valve and the inwall of valve body 101 offset, valve body 101 band movable valve plugs 102 move downward in the lump, until storage presses the pressure decreased in chamber 8 to the setting pressure of pressure-regulating device 11, valve body 101 and the spool 102 of constant pressure valve 10 are kept in the center, and pressure is again constant.That summarizes says, when storage pressed chamber 8 internal pressures to be higher than the setting pressure of regulator bolts, the valve port of constant pressure valve 10 is opened the discharge excess pressure made storage press the pressure in the chamber 8 to keep constant.
In the present embodiment, this motor fuel injection pump for automobile is external, just can be directly installed on the motor of motorcycle by screw, its pump housing has been abandoned traditional metallic case, adopts the manufacturing of enhancement engineering plastics, and lightweight intensity is high, high-low temperature resistant, and volume compact, price are low.
In the present embodiment, piston structure makes the discharge pressure of fuel oil in the fuel pump larger, the conveying negative pressure that forms also can overcome greatly the vapour lock pressure in the low-pressure oil delivery pipe road, like this, can not produce gas in the pipeline road, the conveying of fuel oil can not produce interruption, and fuel oil can be input in the oil sprayer continually and steadily, endlessly; Have, this fuel pump can be directly installed on the motorcycle engine again, and the fuel oil delivery side of pump directly connects oil sprayer, has saved the high-pressure connecting pipe road between fuel pump and the oil sprayer, and motor, fuel pump, oil sprayer form integrative-structure, compact structure; And fuel pipe adopts low pressure oil supply, has overcome built-in fuel pump with high-pressure oil feed, defective that the pipeline pressure-bearing is high; In addition, the external fuel oil pump keeps in repair easily with respect to the integral heat emission better effects if; This fuel pump can replace Carburetor, need not to change other devices.
Above-described embodiment only is enumerating of the utility model technical conceive way of realization; protection domain of the present utility model is not limited only to above-described embodiment, and protection domain of the present utility model may extend to those skilled in the art according to the thinkable equivalent technologies means of technical conceive of the present utility model.
Claims (10)
1. external motor fuel injection pump for automobile, comprise the pump housing, it is characterized in that: be provided with piston sleeve in the described pump housing, slide the piston in piston sleeve, described piston connects the driving mechanism that makes its linear reciprocating motion, described piston tip is equipped with the first one-way valve, is provided with the first cavity in the lower end of the first one-way valve in the described piston, is provided with the second cavity in the upper end of the first one-way valve in the described piston sleeve, described the first cavity is communicated with shoe cream room, and described shoe cream room is communicated with the transport pipe of fuel tank; In the upper end of the second cavity the second one-way valve, constant pressure valve, pressure-regulating device are housed successively in the described pump housing, leave storage between described the second one-way valve and the constant pressure valve and press the chamber, described constant pressure valve comprises valve body, spool, described spool upper end offsets with the inwall of valve body, between described valve body and the pump housing flexible sheet is housed, described flexible sheet and valve body are synchronized with the movement, described spool connects the first spring, described pressure-regulating device is opened described spool pressure release in constant pressure valve rising situation, until storage presses the pressure decreased in chamber to the setting pressure of pressure-regulating device.
2. external motor fuel injection pump for automobile as claimed in claim 1, it is characterized in that: described pressure-regulating device comprises the regulator bolts that is threaded in the pump housing, the lower end of regulator bolts has the spool that pushes described constant pressure valve opens valve port, and then makes storage press the part that pushes of chamber pressure release.
3. external motor fuel injection pump for automobile as claimed in claim 1 or 2, it is characterized in that: described driving mechanism comprises electric rotating machine and the driving mechanism that rotatablely moving of electric rotating machine is converted into linear reciprocating motion.
4. external motor fuel injection pump for automobile as claimed in claim 3 is characterized in that: be connected with the second spring between described constant pressure valve body and the pump housing.
5. external motor fuel injection pump for automobile as claimed in claim 4 is characterized in that: be provided with the 3rd one-way valve between described shoe cream room and the transport pipe.
6. external motor fuel injection pump for automobile as claimed in claim 5, it is characterized in that: described the first one-way valve and the second one-way valve are ball valve.
7. external motor fuel injection pump for automobile as claimed in claim 5 is characterized in that: described driving mechanism comprises the capacity eccentric bearing that is driven by described electric rotating machine, and this capacity eccentric bearing connects described piston by a connecting rod.
8. external motor fuel injection pump for automobile as claimed in claim 1, it is characterized in that: described the first spring is the Compress Spring that is positioned at described spool bottom.
9. external motor fuel injection pump for automobile as claimed in claim 2, it is characterized in that: the described part that pushes is the projection that is arranged on the regulator bolts lower end.
10. external motor fuel injection pump for automobile as claimed in claim 1, it is characterized in that: the spool of described constant pressure valve is spheroid.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220522987 CN202789254U (en) | 2012-10-12 | 2012-10-12 | External fuel pump for motorcycle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220522987 CN202789254U (en) | 2012-10-12 | 2012-10-12 | External fuel pump for motorcycle |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202789254U true CN202789254U (en) | 2013-03-13 |
Family
ID=47816529
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220522987 Withdrawn - After Issue CN202789254U (en) | 2012-10-12 | 2012-10-12 | External fuel pump for motorcycle |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202789254U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102889157A (en) * | 2012-10-12 | 2013-01-23 | 众恒汽车部件有限公司 | External fuel pump for motorcycles |
| CN105317602A (en) * | 2015-06-25 | 2016-02-10 | 众恒汽车部件有限公司 | External fuel pump assembly |
-
2012
- 2012-10-12 CN CN 201220522987 patent/CN202789254U/en not_active Withdrawn - After Issue
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102889157A (en) * | 2012-10-12 | 2013-01-23 | 众恒汽车部件有限公司 | External fuel pump for motorcycles |
| CN102889157B (en) * | 2012-10-12 | 2014-06-25 | 众恒汽车部件有限公司 | External fuel pump for motorcycles |
| CN105317602A (en) * | 2015-06-25 | 2016-02-10 | 众恒汽车部件有限公司 | External fuel pump assembly |
| CN105317602B (en) * | 2015-06-25 | 2018-06-12 | 众恒汽车部件有限公司 | External fuel oil pump assembly |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20130313 Effective date of abandoning: 20140625 |
|
| RGAV | Abandon patent right to avoid regrant |