CN212985426U - Fuel common rail system - Google Patents
Fuel common rail system Download PDFInfo
- Publication number
- CN212985426U CN212985426U CN202021184897.5U CN202021184897U CN212985426U CN 212985426 U CN212985426 U CN 212985426U CN 202021184897 U CN202021184897 U CN 202021184897U CN 212985426 U CN212985426 U CN 212985426U
- Authority
- CN
- China
- Prior art keywords
- common rail
- fuel
- gas
- rail pipe
- rail system
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Abstract
The utility model belongs to the technical field of fuel equipment, concretely relates to fuel common rail system. The utility model provides a fuel is rail system altogether includes that the gas is rail pipe altogether, regulating channel and fuel are rail pipe altogether, the intraductal connecting hole that is equipped with is altogether to the gas, regulating channel wears to locate the gas and is rail pipe altogether, regulating channel's one end is equipped with fastening unit, one side that regulating channel is close to fastening unit still is equipped with the adjusting unit, the adjusting unit is located regulating channel's inside and can control the switching state that the gas is rail pipe altogether with mobilizable mode, fastening unit's circumference is equipped with the clearance when adjusting unit contacts with fastening unit, the connecting hole can communicate clearance and gas and rail pipe altogether, the fuel is rail pipe altogether and regulating channel's the other end is linked together. By using the fuel common rail system in the technical scheme, when the common rail system works, the adjusting unit is driven to move up and down, the opening and closing of the fuel gas common rail pipe are controlled, and the requirement of the working condition of an engine on the fuel gas/fuel oil rail pressure is met.
Description
Technical Field
The utility model belongs to the technical field of fuel equipment, concretely relates to fuel common rail system.
Background
The engine has wide operating condition range, the driving operation of accelerator and accelerator is frequently performed during driving, and correspondingly the rail pressure of the fuel supply system is also frequently switched corresponding to the frequent switching of the engine from high load to low load and from high rotating speed to low rotating speed. The rail pressure control of the fuel supply system is mainly realized by IMV and leakage quantity of the fuel supply system: the transition from the low rail pressure to the high rail pressure is mainly realized by increasing the opening of the IMV, and the transition from the high rail pressure to the low rail pressure can realize the rapid reduction of the fuel rail pressure by reducing the opening of the IMV and the leakage amount of the fuel injector.
In the rail pressure control, the function of increasing the rail pressure can be realized by increasing the opening degree of the gas pressure regulating valve. However, when the engine needs to reduce the rail pressure of the fuel gas when the rotating speed or the load of the engine is reduced, the rail pressure of the fuel gas cannot be rapidly reduced by using a diesel rail pressure control method. In the prior art, the rail pressure can be rapidly reduced by emptying a certain amount of gas, although the requirement of the working condition of an engine on the rail pressure of the gas/fuel oil can be rapidly met, the exhausted gas is difficult to recycle, the gas consumption of the whole vehicle is increased, and on the other hand, the difficulty and risk of emission treatment are increased by the exhausted gas.
SUMMERY OF THE UTILITY MODEL
The utility model aims at solving the problem that the rail pressure is reduced but the energy is wasted by emptying the gas of the gas system at least. The purpose is realized by the following technical scheme:
a first aspect of the present invention provides a fuel common rail system, including:
the fuel gas common rail pipe is internally provided with a connecting hole;
the adjusting channel penetrates through the gas common rail pipe, a fastening unit is arranged at one end of the adjusting channel, an adjusting unit is further arranged on one side, close to the fastening unit, of the adjusting channel, the adjusting unit is movably located inside the adjusting channel and can control the opening and closing states of the gas common rail pipe, a gap is formed in the circumferential direction of the fastening unit when the adjusting unit is in contact with the fastening unit, and the connecting hole can communicate the gap with the gas common rail pipe;
and the fuel oil common rail pipe is communicated with the other end of the adjusting channel.
Through using the fuel common rail system among this technical scheme, because the pressure of fuel common rail pipe is different with the pressure of fuel common rail pipe, when the operation of common rail system, the connecting hole makes the pressure at regulating unit both ends produce the difference, thereby drive regulating unit and carry out displacement from top to bottom under the spacing condition of fastening unit, and then control the switching of fuel common rail pipe, realize the quick step-down of gas pressure and fuel pressure under the circumstances of not discharging the gas, the requirement of engine operating mode to gas/fuel rail pressure has been satisfied.
In addition, according to the present invention, the fuel common rail system may further have the following additional technical features:
the utility model discloses an in some embodiments, adjust the passageway including the first passageway, the second of adjusting that set gradually and adjust the passageway and the third passageway of adjusting, the one end of first passageway of adjusting is equipped with fastening unit, the second is adjusted the passageway and is located in the fuel rail common pipe, the third adjust the passageway with the fuel rail common pipe is linked together.
In some embodiments of the present invention, the adjusting unit includes a piston and a spring, and the spring is sleeved outside the piston.
The utility model discloses an in some embodiments, the piston includes head, separation portion, intercommunication and afterbody in proper order, the head with first regulation passageway looks adaptation, separation portion with passageway looks adaptation is adjusted to the second, the intercommunication is worn to locate the gas is rail pipe altogether with the passageway is adjusted to the third, the diameter size of intercommunication is less than the diameter size of the inner chamber of fuel rail pipe altogether, the afterbody with passageway looks adaptation is adjusted to the third.
In some embodiments of the present invention, one end of the spring is abutted against the head, and the other end of the spring is abutted against the fuel common rail pipe.
In some embodiments of the present invention, the circumferential direction of the tail portion is provided with a first seal ring.
In some embodiments of the present invention, a diameter dimension of the communicating portion is smaller than a diameter dimension of the blocking portion.
In some embodiments of the present invention, the fastening unit includes a fastening bolt connected to one end of the adjustment passage.
In some embodiments of the present invention, the fastening unit further includes a second sealing ring, and the second sealing ring is sleeved on the fastening bolt.
Drawings
Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The drawings are only for purposes of illustrating the preferred embodiments and are not to be construed as limiting the invention. Also, like parts are designated by like reference numerals throughout the drawings. In the drawings:
fig. 1 schematically shows an overall structural schematic of a fuel common rail system according to an embodiment of the present invention;
fig. 2 is a sectional view showing the entire structure of a portion a of the fuel common rail system of fig. 1.
10: gas common rail pipe, 11: connecting holes;
21: first regulation passage, 22: second regulation passage, 23: third modulation channel, 2411: head, 2412: barrier, 2413: communication section, 2414: tail, 24141: first seal ring, 242: spring, 251: fastening bolts, 252: a second seal ring;
30: and (3) a fuel oil common rail pipe.
Detailed Description
Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. While exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art.
It is to be understood that the terminology used herein is for the purpose of describing particular example embodiments only, and is not intended to be limiting. As used herein, the singular forms "a", "an" and "the" may be intended to include the plural forms as well, unless the context clearly indicates otherwise. The terms "comprises," "comprising," "including," and "having" are inclusive and therefore specify the presence of stated features, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, steps, operations, elements, components, and/or groups thereof. The method steps, processes, and operations described herein are not to be construed as necessarily requiring their performance in the particular order described or illustrated, unless specifically identified as an order of performance. It should also be understood that additional or alternative steps may be used.
Although the terms first, second, third, etc. may be used herein to describe various elements, components, regions, layers and/or sections, these elements, components, regions, layers and/or sections should not be limited by these terms. These terms may be only used to distinguish one element, component, region, layer or section from another region, layer or section. Terms such as "first," "second," and other numerical terms when used herein do not imply a sequence or order unless clearly indicated by the context. Thus, a first element, component, region, layer or section discussed below could be termed a second element, component, region, layer or section without departing from the teachings of the example embodiments.
For convenience of description, spatially relative terms, such as "inner", "outer", "lower", "below", "upper", "above", and the like, may be used herein to describe one element or feature's relationship to another element or feature as illustrated in the figures. Such spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figures is turned over, elements described as "below" or "beneath" other elements or features would then be oriented "above" or "over" the other elements or features. Thus, the example term "below … …" can include both an orientation of above and below. The device may be otherwise oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.
Fig. 1 schematically shows an overall structural schematic of a fuel common rail system according to an embodiment of the present invention. Fig. 2 is a sectional view showing the entire structure of a portion a of the fuel common rail system of fig. 1. As shown in fig. 1 and 2, the present invention provides a fuel common rail system. The utility model provides a fuel is rail system altogether includes that the gas is rail pipe 10 altogether, regulation passageway and fuel are rail pipe 30 altogether, be equipped with connecting hole 11 in the rail pipe 10 altogether in the gas, regulation passageway wears to locate the rail pipe 10 altogether in the gas, the one end of regulating passageway is equipped with fastening unit, one side that regulation passageway is close to fastening unit still is equipped with adjusting unit, adjusting unit is located the inside of regulating passageway with mobilizable mode and can controls the switching state of rail pipe 10 altogether in the gas, adjusting unit is equipped with the clearance with fastening unit's circumference when contacting, connecting hole 11 can communicate clearance and gas and rail pipe 10 altogether, rail pipe 30 is linked together with adjusting passageway's the other end altogether in the fuel.
Through using the fuel common rail system among this technical scheme, because the pressure of fuel common rail pipe 30 is different with the pressure of fuel common rail pipe 10, when the operation of common rail system, connecting hole 11 makes the pressure at regulating unit both ends produce the difference, thereby drive the regulating unit and carry out displacement from top to bottom under the spacing condition of fastening unit, and then control the switching of fuel common rail pipe 10, realize the quick step-down of gas pressure and fuel pressure under the condition of not discharging the gas, the requirement of engine operating mode to gas/fuel rail pressure has been satisfied.
Further, in the present embodiment, the regulating passage includes a first regulating passage 21, a second regulating passage 22 and a third regulating passage 23 which are sequentially provided, and one end of the first regulating passage 21 is provided with a fastening unit for closing an upper end of the regulating passage to prevent gas leakage while allowing the upper end of the regulating passage to receive gas pressure from the connecting hole 11. The second regulating passage 22 is provided in the fuel common rail pipe 30 for the regulating unit to realize the open and close state of the fuel common rail pipe 10. The third regulation passage 23 communicates with the fuel common rail 30 so that the lower end of the regulation unit receives the fuel pressure from the fuel common rail 30.
Specifically, in the present embodiment, the adjusting unit includes a piston and a spring 242, the spring 242 is sleeved outside the piston, and the elastic force of the spring 242 can repeatedly adjust the piston up and down during the operation of the common rail system, so as to stabilize and balance the pressure.
Further, in the present embodiment, the piston includes a head portion 2411, a blocking portion 2412, a communicating portion 2413, and a tail portion 2414 in this order, and the head portion 2411 is fitted to the first adjusting passage 21, so that the head portion 2411 slides inside the first adjusting passage 21, thereby moving the entire piston and controlling the opening and closing of the gas common rail 10. The blocking part 2412 is matched with the second adjusting channel 22, and when the blocking part 2412 is located on the gas common rail pipe 10, the gas common rail pipe 10 is in a disconnected state, so that the volume of the common rail pipe connected with the oil injector is rapidly reduced, and the reduction of rail pressure is realized. The communicating part 2413 penetrates through the gas common rail pipe 10 and the third adjusting passage 23, the diameter size of the communicating part 2413 is smaller than that of the inner cavity of the fuel oil common rail pipe 30, and when the communicating part 2413 is located in the gas common rail pipe 10, the gas common rail pipe 10 is in a communicating state. The tail portion 2414 is matched with the third adjusting passage 23, the tail portion 2414 is used for isolating the fuel gas common rail pipe 10 and the fuel oil common rail pipe 30, meanwhile, the tail portion 2414 can also receive the pressure of the fuel oil common rail pipe 30 of the third adjusting passage 23, so that the piston is stressed, the stress is compared with the fuel gas pressure at the other end of the piston, and the adjustment of the common rail system is completed.
Specifically, in the present embodiment, one end of the spring 242 abuts against the head 2411, the other end of the spring 242 abuts against the common fuel rail 30, and the spring 242 can perform a return operation of the piston in accordance with the fuel gas pressure and the fuel pressure, thereby achieving pressure regulation of the entire system.
Further, in the present embodiment, a first sealing ring 24141 is provided in the circumferential direction of the tail portion 2414 to seal the gas and prevent leakage of the gas.
Specifically, in the present embodiment, the diameter of the communication portion 2413 is smaller than the diameter of the blocking portion 2412, so that the gas common rail pipe 10 can be in an open state when the communication portion 2413 is completely located in the gas common rail pipe 10, and the gas common rail pipe 10 can be in a closed state when the blocking portion 2412 is completely located in the gas common rail pipe 10.
Further, in the present embodiment, the fastening unit includes a fastening bolt 251, and the fastening bolt 251 is connected to one end of the adjustment passage. The fastening bolt 251 is fixed to one end of the first adjusting passage 21, and when the fuel/gas rail pressure is kept constant or increased, the fastening bolt 251 can perform a limiting function on the piston, so that the piston can be kept at the highest point, i.e., the piston is in contact with the fastening bolt 251.
Specifically, in the present embodiment, the fastening unit further includes a second sealing ring 252, the second sealing ring 252 is sleeved on the fastening bolt 251, and the second sealing ring 252 is used for sealing the gas and preventing the gas from leaking.
Further, in the present embodiment, during steady-state operation, acceleration or loading operation of the engine, the fuel/gas rail pressure is kept constant or increased, and at this time, the piston is kept at the highest point under the action of the force of the spring 242 and the pressure difference between the two ends, that is, the piston is in contact with the fastening bolt 251, and the highest point is limited by the fastening bolt 251. When the engine is in deceleration or load reduction operation, lower fuel/gas rail pressure is needed at the moment, the fuel pressure can quickly drop to the target rail pressure under the conditions that the fuel injector leaks and the opening of the IMV valve is reduced, and at the moment, the piston can move downwards under the action of the increased pressure difference of the upper end surface and the lower end surface to temporarily separate the volumes of the left side and the right side of the fuel gas common rail pipe 10, so that the volume of the common rail pipe connected with the fuel injector is quickly reduced. Because the gas in the common rail pipe can descend rapidly after being sprayed by the oil sprayer, the pressure difference of the upper end surface and the lower end surface of the piston is reduced to reset rapidly, the high-pressure gas on the right side is compensated into the left volume cavity with reduced pressure due to spraying, the pressure of the common rail pipe is balanced newly through the reciprocating adjustment of the piston for a plurality of times, and finally the piston is restored to the highest point position, so that the rapid pressure reduction of the gas pressure and the fuel pressure is realized under the condition of not discharging the gas, and the requirement of the working condition of the engine on the gas/fuel rail pressure is met.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention should be covered by the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (9)
1. A fuel common rail system, comprising:
the fuel gas common rail pipe is internally provided with a connecting hole;
the adjusting channel penetrates through the gas common rail pipe, a fastening unit is arranged at one end of the adjusting channel, an adjusting unit is further arranged on one side, close to the fastening unit, of the adjusting channel, the adjusting unit is movably located inside the adjusting channel and can control the opening and closing states of the gas common rail pipe, a gap is formed in the circumferential direction of the fastening unit when the adjusting unit is in contact with the fastening unit, and the connecting hole can communicate the gap with the gas common rail pipe;
and the fuel oil common rail pipe is communicated with the other end of the adjusting channel.
2. The fuel common rail system according to claim 1, wherein the regulation passage includes a first regulation passage, a second regulation passage, and a third regulation passage, which are arranged in this order, the first regulation passage is provided at one end thereof with the fastening unit, the second regulation passage is provided within the fuel common rail pipe, and the third regulation passage is communicated with the fuel common rail pipe.
3. The fuel common rail system of claim 2, wherein the adjustment unit comprises a piston and a spring, the spring being sleeved outside the piston.
4. The fuel common rail system of claim 3, wherein the piston comprises a head portion, a blocking portion, a communicating portion and a tail portion in sequence, the head portion is matched with the first adjusting channel, the blocking portion is matched with the second adjusting channel, the communicating portion penetrates through the gas common rail pipe and the third adjusting channel, the diameter of the communicating portion is smaller than that of an inner cavity of the fuel common rail pipe, and the tail portion is matched with the third adjusting channel.
5. The fuel common rail system of claim 4, wherein one end of the spring abuts the head and the other end of the spring abuts the fuel common rail.
6. The fuel common rail system of claim 4, wherein the tail portion is circumferentially provided with a first seal ring.
7. The fuel common rail system according to claim 4, wherein a diameter dimension of the communication portion is smaller than a diameter dimension of the blocking portion.
8. The fuel common rail system according to claim 1, wherein the fastening unit includes a fastening bolt that is connected to one end of the adjustment passage.
9. The fuel common rail system of claim 8, wherein the fastening unit further comprises a second seal ring, the second seal ring being fitted over the fastening bolt.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021184897.5U CN212985426U (en) | 2020-06-22 | 2020-06-22 | Fuel common rail system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021184897.5U CN212985426U (en) | 2020-06-22 | 2020-06-22 | Fuel common rail system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212985426U true CN212985426U (en) | 2021-04-16 |
Family
ID=75425807
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202021184897.5U Active CN212985426U (en) | 2020-06-22 | 2020-06-22 | Fuel common rail system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN212985426U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113217242A (en) * | 2021-05-26 | 2021-08-06 | 河南柴油机重工有限责任公司 | Common rail system suitable for V-type dual-fuel engine |
-
2020
- 2020-06-22 CN CN202021184897.5U patent/CN212985426U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113217242A (en) * | 2021-05-26 | 2021-08-06 | 河南柴油机重工有限责任公司 | Common rail system suitable for V-type dual-fuel engine |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101784785B (en) | Fuel injection valve with improved tightness on the sealing seat of a pressure-compensated control valve | |
| CN101548093B (en) | Fuel injection valve for internal combustion engines | |
| US20140020773A1 (en) | Diesel Fuel Leakage Control System for a Dual Fuel Injector | |
| CN212985426U (en) | Fuel common rail system | |
| CN102177333A (en) | Fuel supply system for heavy oil common rail injection systems | |
| CN101849098B (en) | Injection system, and method for the production of an injection system | |
| CN101874156A (en) | Ball-valve operated fuel injector | |
| CN101310104A (en) | High pressure fuel injector | |
| US7234650B2 (en) | Three-way valve and fuel injection device having the same | |
| JP2006118492A (en) | Fuel injection device | |
| CN101532455A (en) | Injection valve for direct injection | |
| US5718385A (en) | Control arrangement for a fuel injection valve | |
| CN101360909B (en) | Fuel injector | |
| EP2649294B1 (en) | A fuel injection apparatus, a piston engine and method of operating a piston engine | |
| CN101065573A (en) | Fuel injector | |
| CN211975248U (en) | Oil sprayer and fuel system with same | |
| JP4454195B2 (en) | Fuel injection valve | |
| JP2003513195A (en) | Fuel injection valve used for internal combustion engine | |
| EP2815088B1 (en) | A hydraulic valve arrangement for controllably operating a gas exchange valve of an internal combustion piston engine | |
| EP3841287B1 (en) | Cylinder valve assembly with valve spring venting arrangement | |
| CN106065835B (en) | Electrocontrolled high-pressure fuel injector with independent control piston couple | |
| CN114738155B (en) | Fuel injection valve assembly, engine and vehicle | |
| CN115324796B (en) | Fuel injector and internal combustion engine | |
| CN212985500U (en) | Air compressor machine and vehicle | |
| CN100416081C (en) | Device for fuel injection rate shaping |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |