CN214112275U

CN214112275U - High-pressure-resistant fuel tank assembly

Info

Publication number: CN214112275U
Application number: CN202022766775.3U
Authority: CN
Inventors: 张允峰; 唐基荣; 徐靖
Original assignee: SAIC GM Wuling Automobile Co Ltd
Current assignee: SAIC GM Wuling Automobile Co Ltd
Priority date: 2020-11-25
Filing date: 2020-11-25
Publication date: 2021-09-03
Anticipated expiration: 2030-11-25

Abstract

The utility model discloses a high pressure resistant fuel tank assembly, including fuel tank body, fuel pump, breather valve and isolating valve, the fuel tank body is detachable fixed with lower vehicle body, the fuel tank body encloses to be established and is formed with the first cavity that holds fluid, the fuel pump with the breather valve is in respectively the top left side and the central authorities of fuel tank body with first cavity intercommunication, the isolating valve is detachable to be fixed in the right side position department of fuel tank body, the isolating valve with the top of breather valve can open and close formula intercommunication, the rear side facade of fuel tank body is provided with the oil filler hole, first cavity passes through the oil filler hole with the filler pipe can open and close formula intercommunication. The utility model discloses a high pressure resistant fuel tank assembly simple structure, realized high pressure resistance, very big reduction the technological requirement, reduced development cost and part cost, solved the metal oil tank and rocked the abnormal sound shortcoming.

Description

High-pressure-resistant fuel tank assembly

Technical Field

The utility model relates to a car fuel tank technical field especially relates to a high pressure resistant fuel tank assembly.

Background

The automobile fuel tank is made of metal and plastic, and the specifications of the two materials are as follows: the metal oil tank is generally made of a cold-rolled steel plate which can be deeply punched, the thickness of an upper shell is 0.8mm, and the thickness of a lower shell is 1.0 mm; because the metal material has poor shielding effect on the shaking abnormal sound of the liquid in the oil tank, the metal oil tank often has the problem of fuel shaking abnormal sound; plastic fuel tanks are usually made of six-layer co-extruded HDPE/EVOH/HDPE with an average thickness of 5 mm.

The hybrid vehicle type needs to seal the oil tank for a long time and the internal pressure is often more than or equal to 20Kpa because the working time of the engine is shorter than that of the traditional fuel vehicle and the flushing amount of the carbon tank is insufficient, so that fuel steam can easily puncture the carbon tank to be discharged to the atmosphere when a conventional oil tank is adopted, and the evaporative emission cannot meet the emission requirements of national six regulations. The internal pressure of the common fuel tank in the prior art is generally between-7 Kpa and 7Kpa, and the common fuel tank is obviously insufficient in pressure resistance and cannot meet the requirement of national emission standard; the plastic high-pressure oil tank needs to adopt a 2K technology, a large number of supports are added in the plastic high-pressure oil tank, and due to the fact that technical conditions are high, supplier information is few, the technology is immature, and development cost is high, the price of the plastic high-pressure oil tank is high, and market application is not easy to popularize.

Disclosure of Invention

The utility model relates to a solve not enough among the prior art and accomplish, the utility model aims at providing a simple structure, realized high pressure resistance ability, very big reduction the technological requirement, reduced development cost and part cost, solved the metal oil tank and rocked the high pressure resistant fuel tank assembly of abnormal sound shortcoming.

The utility model relates to a high pressure resistant fuel tank assembly, which comprises a fuel tank body, a fuel pump, a vent valve and an isolation valve, the fuel tank body is detachably fixed with the lower vehicle body, a first cavity for containing oil is formed in the fuel tank body in an enclosing manner, the fuel pump is fixed at the left side position of the top of the fuel tank body in a sealing and detachable way, the bottom of the fuel pump is communicated with the first cavity in an openable and closable way, the vent valve is fixed at the central position of the top of the fuel tank body in a sealing and detachable way, the bottom of the vent valve is communicated with the first cavity in an openable and closable way, the isolating valve is detachably fixed at the right side of the fuel tank body, the isolating valve is communicated with the top of the vent valve in an opening and closing manner, the rear side vertical surface of the fuel tank body is provided with a filler opening, and the first cavity is communicated with the filler pipe in an openable and closable manner through the filler opening.

The utility model discloses a high pressure resistant fuel tank assembly can also be:

the fuel tank body is in the sealed detachable oil blocking valve that is fixed with in the position department that corresponds the oil filler hole, first cavity pass through the oil blocking valve with but oil filler pipe open-close type intercommunication.

And a three-way joint is arranged between the isolation valve and the top of the vent valve, and three ports of the three-way joint are respectively communicated with the isolation valve, the top of the vent valve and the front side end part of the circulating pipe in an opening and closing manner.

The first cavity is internally provided with a suspended first breakwater, the top of the first breakwater is fixed with the top of the fuel tank body in a two-layer mode, and the first breakwater longitudinally extends downwards from the top of the fuel tank body to the lower portion of the first cavity.

Still be provided with the second breakwater of suspension in the first cavity, the second breakwater with the horizontal parallel interval of first breakwater sets up, the top of second breakwater with two laminar fixes in the top of fuel tank body, the second breakwater by the vertical downwardly extending in top of fuel tank body reaches the middle part of first cavity.

And circulation holes are formed in the surfaces of the first breakwater and the second breakwater at intervals in the transverse direction and the longitudinal direction.

The bottom of fuel tank body is arranged from left to right interval and is integrated into one piece or is fixed with the first rib of two at least indents, first rib by the longitudinal backward extension of the front side of fuel tank body reaches the rear side of fuel tank body.

The fuel tank body is at two at least first rib corresponds position department and is provided with the bandage, the bandage by the anterior of fuel tank body is walked around downwards the lower part of fuel tank body extends to the rear portion of fuel tank body, the bandage with first rib releasable counterbalance, around the bandage both ends respectively with the car body is detachable fixed down.

The top of the fuel tank body is detachably fixed with a damping device, and the top of the damping device is elastically and detachably abutted to the bottom of the lower vehicle body.

The damping device comprises at least two damping cushions arranged at the top of the fuel tank body at intervals, the bottoms of the damping cushions are adhered to the top of the fuel tank body, and the tops of the damping cushions are detachably abutted to the bottom of the lower vehicle body.

The utility model relates to a high pressure resistant fuel tank assembly, which comprises a fuel tank body, a fuel pump, a vent valve and an isolation valve, the fuel tank body is detachably fixed with the lower vehicle body, a first cavity for containing oil is formed in the fuel tank body in an enclosing manner, the fuel pump is fixed at the left side position of the top of the fuel tank body in a sealing and detachable way, the bottom of the fuel pump is communicated with the first cavity in an openable and closable way, the vent valve is fixed at the central position of the top of the fuel tank body in a sealing and detachable way, the bottom of the vent valve is communicated with the first cavity in an openable and closable way, the isolating valve is detachably fixed at the right side of the fuel tank body, the isolating valve is communicated with the top of the vent valve in an opening and closing manner, the rear side vertical surface of the fuel tank body is provided with a filler opening, and the first cavity is communicated with the filler pipe in an openable and closable manner through the filler opening. Thus, the fuel pump is arranged on the left side of the top of the fuel tank body, the vent valve is arranged at the position of the center of the top of the fuel tank body, because the fuel pump and the vent valve are communicated with the first cavity, and then the corresponding positions of the fuel pump and the vent valve are respectively required to be punched, then the fuel pump and the vent valve are fixed on the corresponding positions of the fuel tank body in a sealing and detachable manner, so that the fuel pump and the vent valve are separated by a certain distance, the rigidity and the strength of the fuel tank body are fundamentally increased, the fuel pump and the vent valve can be ensured to be communicated with the first cavity in an opening and closing manner at any time in the use process, the oil filling opening is arranged in the back side of the fuel tank body, and the first cavity is communicated with the oil filling pipe in an opening and closing manner through the oil filling opening, in the refueling process, the isolating valve is opened according to an instruction of an ECU (electronic control Unit), namely a traveling computer, the pressure of the fuel tank body is released, the first cavity is kept consistent with the external pressure, the smoothness in the refueling process is further ensured, the first cavity and the refueling pipe are in a communicated state, oil enters the first cavity through the refueling port, residual gas in the first cavity passes through the vent valve at the top of the fuel tank body, the vent valve is communicated with the isolating valve, the other end of the isolating valve is connected into a carbon tank, so that air in the first cavity enters the isolating valve through the vent valve, then enters the carbon tank through the isolating valve, is adsorbed and purified in the carbon tank and then is discharged into the external air, and because the upper air in the first cavity usually contains fuel vapor, if the outside air is directly exhausted, the requirement of the national six-emission standard is greatly exceeded. Under a normal state, the isolating valve seals the fuel tank body, controls the pressure of the first cavity to enable the first cavity to be in a safe range, seals the fuel tank body for a long time, and reduces fuel steam leakage. Then will the fuel tank body with the body is detachable fixed down, has guaranteed the fuel tank body can not rock at the car in-process of traveling, and the fuel tank body with can not produce the friction abnormal sound between metal and the metal down between the automobile body. The utility model discloses a high pressure resistant fuel tank assembly is, for prior art's advantage: the structure is simple, the high-pressure resistance is realized, the process requirement is greatly reduced, the development cost and the part cost are reduced, and the defect of abnormal shaking sound of the metal oil tank is overcome.

Drawings

Fig. 1 the utility model relates to a high pressure resistant fuel tank assembly stereogram.

Fig. 2 is a bottom view of a high pressure resistant fuel tank assembly.

Fig. 3 the utility model relates to a view of nai high pressure fuel tank assembly inner structure from bottom.

Fig. 4 the utility model relates to a high pressure resistant fuel tank assembly inner structure right side view.

Fig. 5 the utility model relates to a high pressure resistant fuel tank assembly inner structure left side view.

Description of the figures

1 … shock pad of upper case 2 … lower case 3 …

4 … fuel pump 5 … harness support 6 … vent valve

7 … isolation valve 8 … strap 9 … circulation tube

10 … tee 11 … first rib 12 … second rib

13 … third rib 14 … oil filler 15 … oil stop valve

16 … lower body 17 … first breakwater 18 … second breakwater

19 … first lug 20 … flow hole

Detailed Description

In the description of the present invention, it should be noted that the terms "upper", "lower", "left", "right", "inner", "outer", "vertical", "horizontal", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

The utility model discloses it is with three way connection is in the front side, hinder the oil valve in the rear side, the shock pad is at the upside, first rib is at the downside, the fuel tank body is in the outside, first breakwater is in the inboard, the fuel pump is in the left side, the isolating valve is on the right side to confirm with this "preceding", "back", "left", "right", "upper", "lower", "interior", "outer" direction.

A high pressure resistant fuel tank assembly of the present invention will be described in further detail with reference to fig. 1 to 5 of the drawings.

The utility model relates to a high pressure resistant fuel tank assembly, please refer to each relevant picture in figures 1-5, including fuel tank body, fuel pump, breather valve and isolating valve, the fuel tank body is detachably fixed with the lower body, the fuel tank body encloses and is provided with a first cavity for containing oil, the fuel pump is detachably fixed at the left side position of the top of the fuel tank body and the bottom of the fuel pump is communicated with the first cavity in an openable manner, the breather valve is detachably fixed at the central position of the top of the fuel tank body and the bottom of the breather valve is communicated with the first cavity in an openable manner, the isolating valve is detachably fixed at the right side position of the fuel tank body, the isolating valve is communicated with the top of the breather valve in an openable manner, the rear side facade of the fuel tank body is provided with a filler opening, the first cavity is communicated with the oil filling pipe in an openable and closable manner through the oil filling port. Thus, the fuel pump is arranged on the left side of the top of the fuel tank body, the vent valve is arranged at the position of the center of the top of the fuel tank body, because the fuel pump and the vent valve are communicated with the first cavity, and then the corresponding positions of the fuel pump and the vent valve are respectively required to be punched, then the fuel pump and the vent valve are fixed on the corresponding positions of the fuel tank body in a sealing and detachable manner, so that the fuel pump and the vent valve are separated by a certain distance, the rigidity and the strength of the fuel tank body are fundamentally increased, the fuel pump and the vent valve can be ensured to be communicated with the first cavity in an opening and closing manner at any time in the use process, the oil filling opening is arranged in the back side of the fuel tank body, and the first cavity is communicated with the oil filling pipe in an opening and closing manner through the oil filling opening, in the refueling process, the isolating valve is opened according to an instruction of an ECU (electronic control Unit), namely a traveling computer, the pressure of the fuel tank body is released, the first cavity is kept consistent with the external pressure, the smoothness in the refueling process is further ensured, the first cavity and the refueling pipe are in a communicated state, oil enters the first cavity through the refueling port, residual gas in the first cavity passes through the vent valve at the top of the fuel tank body, the vent valve is communicated with the isolating valve, the other end of the isolating valve is connected into a carbon tank, so that air in the first cavity enters the isolating valve through the vent valve, then enters the carbon tank through the isolating valve, is adsorbed and purified in the carbon tank and then is discharged into the external air, and because the upper air in the first cavity usually contains fuel vapor, if the outside air is directly exhausted, the requirement of the national six-emission standard is greatly exceeded. Under a normal state, the isolating valve seals the fuel tank body, controls the pressure of the first cavity to enable the first cavity to be in a safe range, seals the fuel tank body for a long time, and reduces fuel steam leakage. Then will the fuel tank body with the body is detachable fixed down, has guaranteed the fuel tank body can not rock at the car in-process of traveling, and the fuel tank body with can not produce the friction abnormal sound between metal and the metal down between the automobile body. The utility model discloses a high pressure resistant fuel tank assembly is, for prior art's advantage: the structure is simple, the high-pressure resistance is realized, the process requirement is greatly reduced, the development cost and the part cost are reduced, and the defect of abnormal shaking sound of the metal oil tank is overcome.

The utility model discloses a high pressure resistant fuel tank assembly please refer to relevant each picture in fig. 1 to 5, can also be on the basis of preceding technical scheme: the fuel tank body is in the sealed detachable oil blocking valve that is fixed with in the position department that corresponds the oil filler hole, first cavity pass through the oil blocking valve with but oil filler pipe open-close type intercommunication. Therefore, when oil enters the first cavity through the oil filling port, the oil blocking valve is opened to enable the first cavity to be communicated with the oil filling pipe at the position corresponding to the oil filling port, the oil can enter the first cavity through the oil filling pipe, and in a normal state, the oil blocking valve closes the communication between the first cavity and the oil filling pipe and forms resistance to enable the oil to form a liquid column in the oil filling pipe to carry out liquid sealing on the oil filling port, so that fuel steam in the first cavity is prevented from directly flowing back into the external atmosphere along the oil filling pipe. The further preferable technical scheme is that a three-way joint is arranged between the isolation valve and the top of the vent valve, and three ports of the three-way joint are respectively communicated with the isolation valve, the top of the vent valve and the front side end of the circulating pipe in an opening and closing mode. Therefore, the left end part of the three-way joint is communicated with the vent valve, the right end part of the three-way joint is communicated with the isolation valve, and the rear end of the three-way joint is communicated with the circulating pipe, so that the circulating pipe is simply and conveniently connected between the vent valve and the isolation valve, and the area of the corresponding position of the circulating pipe is connected to the OBD, namely, a vehicle-mounted automatic diagnosis system, so that the leakage risk of the area is detected. The speed of directly discharging the air with the fuel steam in the first cavity into the outside atmosphere can be controlled by setting the inner diameter of one end of the three-way joint connected with the circulating pipe, the smaller the inner diameter is, the slower the air flowing speed is, the fewer air molecules enter the circulating pipe through the three-way joint in unit time are, and then the less the fuel steam is discharged into the outside atmosphere is, the fuel steam quantity discharged into the outside atmosphere is controlled by controlling the inner diameter of the three-way joint, the process requirement is greatly reduced, and the development cost and the part cost are reduced.

The utility model discloses a high pressure resistant fuel tank assembly please refer to relevant each picture in fig. 1 to 5, can also be on the basis of preceding technical scheme: the first cavity is internally provided with a suspended first breakwater, the top of the first breakwater is fixed with the top of the fuel tank body in a two-layer mode, and the first breakwater longitudinally extends downwards from the top of the fuel tank body to the lower portion of the first cavity. Like this, first breakwater will space in the first cavity divide into two parts, when the car is in the surface of jolting, this internal fluid of fuel tank vibrates, first breakwater makes the route that this internal fluid of fuel tank vibrates shortens, and then reduces the kinetic energy that fluid produced when vibrating effectively, reduces the relative velocity of motion of fluid to it is right to weaken fluid the impact of fuel tank body and the sound that fluid self collided the production. A further preferred technical scheme is that a suspended second breakwater is further arranged in the first cavity, the second breakwater and the first breakwater are transversely arranged in parallel at intervals, the top of the second breakwater and the top of the fuel tank body are fixed in a two-layer mode, and the second breakwater longitudinally extends downwards from the top of the fuel tank body to the middle of the first cavity. Like this, the second breakwater with first breakwater will simultaneously first cavity divide into three interval, makes every width between the interval stabilize about 100mm, and furthest reduces fuel and shakes the momentum, the height of second breakwater can be the shortfall in first breakwater, when the liquid level of fluid is located the low department, the kinetic energy of fluid can not be too big, only needs first breakwater can avoid the excessive striking of vibration of fluid the inner wall of fuel tank body, and when the liquid level of fluid is located the eminence, through first breakwater with the second breakwater is simultaneously acted on fluid, furthest has reduced the fluid right the impact of fuel tank body inner wall. A further preferable technical solution is that the first breakwater and the second breakwater are provided with circulation holes at intervals on the surfaces thereof in the transverse direction and the longitudinal direction. Like this, the setting of runner hole can also be in first breakwater with after the second breakwater reduces the velocity of motion to fluid, fluid can pass the runner hole, the runner hole further vibrates produced kinetic energy to fluid and attenuates to reach further fluid striking the produced noise of fuel tank body inner wall and self collision. The diameter of the circulation hole can be 20mm, and a further preferable technical scheme is that the top of the first breakwater and the top of the second breakwater are integrally fixed with a first lug, the top of the first lug is fixed with the inner wall of the top of the fuel tank body in a two-layer manner, the first breakwater and the second breakwater are longitudinally integrally formed or fixed with a third rib, and the third rib extends downwards from the first lug to the bottom. Therefore, the contact area between the fuel tank body and the first breakwater and the contact area between the fuel tank body and the second breakwater are increased by the first lug, and the first breakwater and the second breakwater are fixed more stably. The third ribs are arranged to increase the horizontal sectional areas of the first breakwater and the second breakwater, and under the same stress, the stress borne by the unit area is correspondingly reduced due to the increase of the sectional areas, so that the load borne by the first breakwater and the second breakwater is remarkably improved compared with the load borne without the third ribs, the rigidity and the strength of the first breakwater and the second breakwater are increased, and the first breakwater and the second breakwater can bear the impact of oil to a greater extent.

The utility model discloses a high pressure resistant fuel tank assembly please refer to relevant each picture in fig. 1 to 5, can also be on the basis of preceding technical scheme: the bottom of fuel tank body is arranged from left to right interval and is integrated into one piece or is fixed with the first rib of two at least indents, first rib by the longitudinal backward extension of the front side of fuel tank body reaches the rear side of fuel tank body. Therefore, the first ribs are arranged at the bottom of the fuel tank body at intervals, namely a plurality of first ribs are evenly arranged at the flat position of the bottom of the fuel tank body, the first rib extends from the front side of the fuel tank body to the rear side of the fuel tank body on the bottom surface of the fuel tank body, when the fuel tank body is transversely cut open by a section in the vertical direction, it can be seen that the section of the bottom surface of the fuel tank body is approximately in a wavy outline, the first ribs arranged at intervals increase the cross sectional area of the bottom surface of the fuel tank body, under the same stress, the stress born by the unit area is correspondingly reduced due to the increase of the cross section area, therefore, the load borne by the fuel tank body is obviously improved compared with the load borne without the first ribs, and the rigidity and the strength of the bottom of the fuel tank body are further improved. Further preferred technical scheme does the fuel tank body is at least two first rib corresponds position department and is provided with the bandage, the bandage by the anterior of fuel tank body is walked around downwards the lower part of fuel tank body extends to the rear portion of fuel tank body, the bandage with first rib formula of releasable offsets, the front and back both ends of bandage respectively with the body is detachable fixed down. Like this, the fuel tank body passes through the bandage detachable be fixed in down on the automobile body, the front end of bandage with it is fixed down the automobile body, the bandage by the lower part of fuel tank body is walked around, first rib by the bottom front side of fuel tank body extends the rear side, and first rib indent, for the bandage provides the accommodation space, makes upwards at X the bandage with the anterior laminating of fuel tank body, then the joint in first rib department, follow the extending direction of first rib extends, winds extremely the rear portion of fuel tank body back with the rear portion laminating of fuel tank body, the rear end of bandage with it is fixed down the automobile body, it is right that X is followed promptly to, Y to and Z the fuel tank body has carried out spacing fixedly.

The utility model discloses a high pressure resistant fuel tank assembly please refer to relevant each picture in fig. 1 to 5, can also be on the basis of preceding technical scheme: the side vertical surfaces of the fuel tank body are further provided with second ribs which are concave at intervals, and the second ribs are formed by extending the bottom surface of the fuel tank body upwards to the top of the fuel tank body. Like this, second rib interval arrangement is in the facade of fuel tank body, be in that the lateral part facade of fuel tank body is leveled the position and is evenly arranged a plurality ofly the second rib is cut open with the cross-section of horizontal direction during the fuel tank body, it is visible the cross-section of the lateral part facade of fuel tank body is approximate wavy profile, and the interval sets up the second rib has increased the cross-sectional area of the lateral part facade of fuel tank body, under the atress of the same size, because the cross-sectional area increases, the stress that unit area bore correspondingly diminishes, consequently the load that the fuel tank body can bear is than not the load that can bear during the second rib has had showing the improvement, and then has increased the rigidity and the intensity of the lateral part facade of fuel tank body. Because the right part of the fuel tank body is not provided with a device, the second ribs distributed on the right part of the fuel tank body can be arranged at the top of the fuel tank body in a penetrating mode, so that the rigidity and the strength of the fuel tank body on the right part of the top surface are increased to the maximum extent.

The utility model discloses a high pressure resistant fuel tank assembly please refer to relevant each picture in fig. 1 to 5, can also be on the basis of preceding technical scheme: the top of the fuel tank body is detachably fixed with a damping device, and the top of the damping device is elastically and detachably abutted to the bottom of the lower vehicle body. Like this, damping device is detachable to be fixed in the top of fuel tank body, damping device's top with the bottom of automobile body can be relieved formula counterbalance down, utilizes damping device's elasticity performance buffering car is right at the in-process of traveling down the automobile body with friction and collision that the fuel tank body brought have then reduced the fuel tank body with the probability that the automobile body produced the abnormal sound down. The further preferred technical scheme does damping device include the interval set up in at least two shock pads at fuel tank body top, the bottom of shock pad glues to be located the top of fuel tank body, the top of shock pad with the bottom releasable counterbalance of automobile body down. Like this, the fuel tank body is owing to be provided with the fuel pump a series of devices such as breather valve, consequently the possible unevenness in top of fuel tank body, at least two the shock pad equipartition is in the top of fuel tank body, as long as with the fuel pump devices such as breather valve do not take place to interfere, namely the higher vacant space at fuel tank body top, the bottom of shock pad glues to be established on the fuel tank body, the top of shock pad with the bottom of automobile body offsets down, the shock pad presss from both sides and establishes the fuel tank body with between the automobile body down, utilize the elasticity performance of shock pad reaches the fuel tank body with buffering between the automobile body has reduced both probabilities that produce the abnormal sound.

The utility model discloses a high pressure resistant fuel tank assembly please refer to relevant each picture in fig. 1 to 5, can also be on the basis of preceding technical scheme: at least two wire harness supports for fixing the wire harness are arranged at the top part of the fuel tank body. Therefore, all the wiring harnesses can be fixed on the top of the fuel tank body, and the danger caused by the untidy wiring harnesses is prevented.

The utility model discloses a high pressure resistant fuel tank assembly please refer to relevant each picture in fig. 1 to 5, can also be on the basis of preceding technical scheme: the fuel tank body includes casing and lower casing, go up the casing with casing two laminar fixed in the middle part horizontal plane down, first cavity is by upper portion go up casing and lower part the casing encloses to establish down and forms, the top of first breakwater with the top of second breakwater is all detachably fixed in go up the lower surface of casing, first rib integrated into one piece formula is fixed in down on the casing and by the anterior longitudinal extension of casing extremely down the rear portion of casing, the fuel pump with the breather valve is all sealed detachable being fixed in go up the top of casing, the isolating valve is detachable being fixed in go up the right side of casing with casing right side junction down, the oil filler hole set up in the rear portion facade of last casing. Like this, the fuel tank body by go up the casing with two laminar fixed of casing down, first cavity by go up the casing with the casing encloses to establish and forms down, and then in the technology preparation, can with go up the casing with the casing is moulded respectively down, then will go up the casing with the edge of casing carries out the two-layer formula of forms such as welding fixed down, and further preferred technical scheme does go up the casing with the casing all adopts the corrosion resistant plate material to make down. Therefore, the stainless steel plate, particularly BFS400, has the thickness of 1.2mm and the yield strength of 320Mpa, and the first ribs are arranged on the lower shell, so that the pressure range which can be borne by the fuel tank body is between-15 Kpa and 35Kpa, and the pressure resistance of the fuel tank body is ensured to completely meet the regulation requirements of national six emission standards.

The above description is only for the description of several embodiments of the present invention, but the scope of the present invention should not be considered as falling within the scope of the present invention, in which all the equivalent changes or modifications or the equal-scale enlargement or reduction etc. according to the design spirit of the present invention are made.

Claims

1. A high pressure resistant fuel tank assembly which characterized in that: including fuel tank body, fuel pump, breather valve and isolating valve, the fuel tank body is detachable fixed with lower body, the fuel tank body encloses to establish and is formed with the first cavity that holds fluid, the sealed detachable of fuel pump is fixed in the top left side position department of fuel tank body just the bottom of fuel pump with the first cavity intercommunication of can opening and close formula, the sealed detachable of breather valve is fixed in the top central point department of fuel tank body just the bottom of breather valve with the first cavity intercommunication of can opening and close formula, the isolating valve is detachable to be fixed in the right side position department of fuel tank body, the isolating valve with the top of breather valve can open and close formula intercommunication, the rear side facade of fuel tank body is provided with the oil filler hole, first cavity passes through the oil filler hole can open and close formula intercommunication with the filler pipe.

2. A high pressure resistant fuel tank assembly as set forth in claim 1 wherein: the fuel tank body is in the sealed detachable oil blocking valve that is fixed with in the position department that corresponds the oil filler hole, first cavity pass through the oil blocking valve with but oil filler pipe open-close type intercommunication.

3. A high pressure resistant fuel tank assembly as set forth in claim 1 wherein: and a three-way joint is arranged between the isolation valve and the top of the vent valve, and three ports of the three-way joint are respectively communicated with the isolation valve, the top of the vent valve and the front side end part of the circulating pipe in an opening and closing manner.

4. A high pressure resistant fuel tank assembly as set forth in claim 1 wherein: the first cavity is internally provided with a suspended first breakwater, the top of the first breakwater is fixed with the top of the fuel tank body in a two-layer mode, and the first breakwater longitudinally extends downwards from the top of the fuel tank body to the lower portion of the first cavity.

5. A high pressure resistant fuel tank assembly as set forth in claim 4 wherein: still be provided with the second breakwater of suspension in the first cavity, the second breakwater with the horizontal parallel interval of first breakwater sets up, the top of second breakwater with two laminar fixes in the top of fuel tank body, the second breakwater by the vertical downwardly extending in top of fuel tank body reaches the middle part of first cavity.

6. A high pressure resistant fuel tank assembly as set forth in claim 5 wherein: and circulation holes are formed in the surfaces of the first breakwater and the second breakwater at intervals in the transverse direction and the longitudinal direction.

7. A high pressure resistant fuel tank assembly according to any one of claims 1 to 6 wherein: the bottom of fuel tank body is arranged from left to right interval and is integrated into one piece or is fixed with the first rib of two at least indents, first rib by the longitudinal backward extension of the front side of fuel tank body reaches the rear side of fuel tank body.

8. A high pressure resistant fuel tank assembly as set forth in claim 7 wherein: the fuel tank body is at two at least first rib corresponds position department and is provided with the bandage, the bandage by the anterior of fuel tank body is walked around downwards the lower part of fuel tank body extends to the rear portion of fuel tank body, the bandage with first rib releasable counterbalance, around the bandage both ends respectively with the car body is detachable fixed down.

9. A high pressure resistant fuel tank assembly according to any one of claims 1 to 6 wherein: the top of the fuel tank body is detachably fixed with a damping device, and the top of the damping device is elastically and detachably abutted to the bottom of the lower vehicle body.

10. A high pressure resistant fuel tank assembly as set forth in claim 9 wherein: the damping device comprises at least two damping cushions arranged at the top of the fuel tank body at intervals, the bottoms of the damping cushions are adhered to the top of the fuel tank body, and the tops of the damping cushions are detachably abutted to the bottom of the lower vehicle body.