CN209938313U

CN209938313U - Stainless steel welding oil tank for plug-in hybrid electric vehicle

Info

Publication number: CN209938313U
Application number: CN201920650691.8U
Authority: CN
Inventors: 徐世强
Original assignee: Magna Steyr Automotive Technology (shanghai) Co Ltd
Current assignee: Magna Steyr Automotive Technology (shanghai) Co Ltd
Priority date: 2019-05-08
Filing date: 2019-05-08
Publication date: 2020-01-14
Anticipated expiration: 2029-05-08

Abstract

The utility model relates to a plug-in hybrid stainless steel welding oil tank for car, including the oil tank body, the oil tank body comprises upper housing and lower casing, upper housing and lower casing all adopt 304L stainless steel material to make, upper housing bottom forms face of weld one through the punching press all around, lower housing top forms face of weld two through the punching press all around, upper housing and lower casing are welded as an organic whole through face of weld one, face of weld two, form plasma welding seam between face of weld one of upper housing and the face of weld two of lower casing, the oil filler point has been seted up to the lower casing side, oil pump mouth has been seted up to upper housing top one side, the gas vent has been seted up to upper housing top opposite side, the gas vent is connected the exhaust pipe, the exhaust pipe other end links to each other with the import of FTIV valve, the FTIV valve is installed on upper; compared with the prior art, the utility model, can cut off oil gas and access to the carbon tank when the engine does not function, prevent that carbon tank oil gas transships and lead to preventing that fuel steam discharges to the external world, and structural strength is high.

Description

Stainless steel welding oil tank for plug-in hybrid electric vehicle

[ technical field ]

The utility model belongs to the technical field of the key spare part technique of car and specifically relates to a plug-in hybrid vehicle is with stainless steel welding oil tank.

[ background art ]

With the increasing requirements of national laws and regulations on the evaporation and emission of environment-friendly oil gas of automobiles, the design of a fuel tank which is a primary functional component and can reduce the evaporation and emission of fuel oil becomes more critical, and compared with a plastic fuel tank, a metal fuel tank has more obvious advantages in the fields of hybrid vehicles and vehicles with low evaporation and emission.

For conventional tanks, when the fuel vapor pressure in the tank reaches 4-7kPa, a valve on the tank opens and vapor will be released into the canister. For vehicles of PHEV type, the oil tank is designed as a high-pressure sealed oil tank, and the oil tank can generally bear the vapor pressure of 35-40 kPa. In order to ensure the strength of the high-pressure oil tank, some automobile factories adopt plastic closed oil tank design, but the oil tank needs a plurality of supporting columns added inside, the structure is complex, the cost is higher than that of a steel oil tank, and the volume of the oil tank is reduced.

Furthermore, in the evaporative emission system of the conventional fuel vehicle, fuel vapor is emitted to the canister through the tank gravity valve, and the fuel vapor is adsorbed by activated carbon in the canister. When the engine works, fresh air is sucked into the carbon tank, and the fresh air cleans fuel steam adsorbed by the activated carbon and is sent to the engine together to participate in combustion. However, in the PHEV type, when the vehicle is driven by a motor during driving, the fuel vapor adsorbed in the canister cannot be desorbed. If the steam in the fuel tank is continuously discharged to the carbon tank, the carbon tank is saturated and loses continuous adsorption capacity, and the fuel steam is directly discharged to the outside air, so that the environmental pollution is caused.

[ contents of utility model ]

The utility model aims at solving foretell not enough and provide a plug in electricity stainless steel welding oil tank for hybrid vehicle, can cut off oil gas and access to the carbon tank when the engine does not function, prevent that carbon tank oil gas from transshipping and leading to preventing fuel steam to discharge the external world, and structural strength is high, and is with low costs, and the oil tank volume is big.

In order to achieve the purpose, the stainless steel welding oil tank for the plug-in hybrid electric vehicle comprises an oil tank body, wherein an oil pump is arranged in the oil tank body, the oil tank body is composed of an upper shell 1 and a lower shell 2, the upper shell 1 and the lower shell 2 are both made of 304L stainless steel materials, the upper shell 1 and the lower shell 2 are welded to form an inner cavity, a first welding surface 3 is formed at the periphery of the bottom of the upper shell 1 through stamping, a second welding surface is formed at the periphery of the top of the lower shell 2 through stamping, the upper shell 1 and the lower shell 2 are welded into a whole through the first welding surface 3 and the second welding surface, a plasma welding seam 4 is formed between the first welding surface 3 of the upper shell 1 and the second welding surface of the lower shell 2, a side surface of the lower shell 2 is provided with an oil filling opening 5, one side of the top of the upper shell 1 is provided with an oil pump opening 6, the oil pump opening, go up casing 1 top opposite side and seted up gas vent 7, gas vent 7 is connected with blast pipe 8, the 8 other ends of blast pipe link to each other with FTIV valve 9's import, FTIV valve 9 is installed on last casing 1.

Further, be equipped with oil gas export and tonifying qi mouth on the FTIV valve 9, the entry of pipe connection carbon tank is passed through in the oil gas export of FTIV valve 9, this internal oil gas of oil tank exports to the carbon tank emission through the oil gas of FTIV valve 9, the tonifying qi mouth of FTIV valve 9 passes through the blow vent of pipe connection carbon tank to introduce the air to the oil tank body through the blow vent of carbon tank.

Further, the export of carbon tank is connected with automobile engine, oil pump, FTIV valve 9, automobile engine pass through the circuit connection control unit respectively, and are controlled by the control unit respectively.

Furthermore, the wall thicknesses of the upper shell 1 and the lower shell 2 are both 0.7-1mm, and the widths of the first welding surface 3 and the second welding surface are not more than 5 mm.

Compared with the prior art, the utility model, have following advantage:

(1) the utility model has high structural strength, high pressure resistance, 3Bar high pressure resistance compared with the common plastic oil tank, and the metal welding oil tank of the utility model can reach 6 Bar;

(2) the utility model has the advantages of fast welding speed, good welding seam quality, low cost and convenient production of the oil tank by applying the plasma welding technology;

(3) the utility model discloses anti oil gas volatility is strong, and is more than 10 times higher than ordinary plastic fuel tank anti oil gas volatility.

(4) The utility model applies the oil tank isolating valve (FTIV) of the plug-in hybrid electric vehicle, can cut off the oil gas to lead to the carbon tank when the engine is not operated, and prevent the oil gas overload of the carbon tank from preventing the fuel steam from discharging to the outside;

(5) the utility model discloses do not need extra coating or surface treatment, and half shell design, make things convenient for the internals to install, the volume is big simultaneously, and raw and other materials can recycle, and manufacturing process is simple, is worth popularizing and applying.

[ description of the drawings ]

Fig. 1 is a schematic structural diagram of the present invention;

in the figure: 1. the device comprises an upper shell 2, a lower shell 3, a first welding surface 4, a plasma welding seam 5, an oil filling port 6, an oil pump port 7, an exhaust port 8, an exhaust pipe 9 and an FTIV valve.

[ detailed description of the invention ]

The invention is further described below with reference to the accompanying drawings:

as shown in the attached figure 1, the utility model provides a stainless steel welded oil tank with an oil tank isolating valve, which is suitable for plug-in hybrid electric vehicles (PHEV), the stainless steel welded oil tank comprises an oil tank body, an oil pump is arranged in the oil tank body, the oil tank body is composed of an upper shell 1 and a lower shell 2, the upper shell 1 and the lower shell 2 are both made of 304L stainless steel material, the upper shell 1 and the lower shell 2 are welded to form an inner cavity, a welding surface I3 is formed around the bottom of the upper shell 1 by stamping, a welding surface II is formed around the top of the lower shell 2 by stamping, the upper shell 1 and the lower shell 2 are welded into a whole by the welding surface I3 and the welding surface II, a plasma welding seam 4 is formed between the welding surface I3 of the upper shell 1 and the welding surface II of the lower shell 2, an oil injection port 5 is arranged on the side surface of the lower shell 2, an oil pump port 6 is, the oil pump opening 6 is arranged at the oil filling opening 5, the exhaust opening 7 is formed in the other side of the top of the upper shell 1, the exhaust opening 7 is connected with an exhaust pipe 8, the other end of the exhaust pipe 8 is connected with an inlet of an FTIV valve 9 (a fuel tank stop valve), and the FTIV valve 9 is installed on the upper shell 1.

The wall thicknesses of the upper shell 1 and the lower shell 2 are both 0.7-1mm, and the widths of the welding surface I3 and the welding surface II are not more than 5 mm; be equipped with oil gas export and tonifying qi mouth on FTIV valve 9, the entry of pipe connection carbon tank is passed through in the oil gas export of FTIV valve 9, this internal oil gas of oil tank exports to the carbon tank emission through the oil gas of FTIV valve 9, the tonifying qi mouth of FTIV valve 9 passes through the blow vent of pipe connection carbon tank, and introduce the air to the oil tank body through the blow vent of carbon tank, the export and the automobile engine of carbon tank are connected, the oil pump, FTIV valve 9, automobile engine passes through the line connection control unit respectively, and be controlled by the control unit respectively.

The utility model discloses stainless steel welding oil tank adopts 304L stainless steel material, compares with ordinary carbon steel material, and 304L stainless steel need not additionally need not extra coating or surface treatment, can satisfy the outside salt spray test requirement of oil tank, and the corrosion-resistant requirement of the inside multiple fuel of oil tank, including gasoline, the gasoline that adds the ethanol, diesel oil, biodiesel and other fuels. The oil tank is divided into an upper shell and a lower shell, and the process is simple, compared with the process of a plastic oil tank, the requirement on production equipment is low, and the oil tank can be processed and formed by using a standard punch, so that an oil tank manufacturer can conveniently select an oil tank production place near an automobile assembly plant, and the logistics cost is saved. The wall thickness of the plastic oil tank generally fluctuates about 3-7mm, the wall thickness of the stainless steel oil tank is uniform and can reach 0.7mm at the thinnest, the fluctuation of the wall thickness is at most 30%, the wall thickness is greatly reduced, and the internal volume of the stainless steel oil tank can be obviously increased due to the same external dimension.

Compared with a plastic oil tank, the stainless steel oil tank is high in structural strength, good in high-pressure resistance, and smaller in deformation and expansion after high pressure is applied, and the gap between the oil tank and a vehicle body can be reduced in design, so that the volume of the oil tank can be increased in design. In addition, the outside of the plastic fuel tank is generally provided with a heat shield to prevent the fuel tank from being scalded by the high temperature of the exhaust pipe. The stainless steel oil tank can be free of a heat shield, so that the size is reduced, and the cost is reduced. The fuel oil evaporation emission value of the stainless steel material is 0, and the requirements of national laws and regulations on the increasingly promoted evaporation and emission of environment-friendly oil gas of automobiles are completely met. Moreover, the stainless steel material can be recycled by 100 percent, and the technical policy of recycling scraped cars is completely met.

The utility model discloses a stamping process, the difference punching press goes out the face of weld on upper and lower casing, the welding process on next step of being convenient for. The upper and lower shells which are formed by punching are welded together by utilizing the characteristics of plasma welding energy concentration, high production rate, high welding speed, small stress deformation, stable electric arc, suitability for welding thin plates and box materials and the like. The width requirement of the welding surface of the plasma welding process is very small and can reach 5mm or even smaller, so that the volume of the oil tank can be correspondingly increased in the design of the oil tank structure.

In addition, as the legal regulations have higher and higher requirements for evaporative emission of fuel, many of the valves and pipes of the fuel tank need to be designed inside the fuel tank to meet the requirements. For a plastic oil tank, an inner part needs to be installed in a plastic heating state before mold closing, the process conditions are harsh, the operation is complex, and the quality state monitoring is difficult, so that the yield is low. And the utility model discloses a technology require very simply to the assembly process of inner part, can be in welding the preceding hand frock match can. The FTIV valve is arranged on an oil tank of a vehicle, and oil gas is discharged to the carbon tank through the FTIV; when the oil tank is replenished, air is introduced into the oil tank from the vent of the carbon tank. The FTIV valve maintains the tank pressure within a normal range.

The present invention is not limited by the above embodiments, and any other changes, modifications, substitutions, combinations, and simplifications which do not depart from the spirit and principle of the present invention should be equivalent replacement modes, and are all included in the protection scope of the present invention.

Claims

1. The utility model provides a plug-in hybrid vehicle is with stainless steel welding oil tank, includes the oil tank body, this internal oil pump that is equipped with of oil tank, its characterized in that: the oil tank body is composed of an upper shell (1) and a lower shell (2), the upper shell (1) and the lower shell (2) are made of 304L stainless steel materials, the upper shell (1) and the lower shell (2) are welded to form an inner cavity, a first welding face (3) is formed at the bottom of the upper shell (1) in a stamping mode all around, a second welding face is formed at the top of the lower shell (2) in a stamping mode all around, the upper shell (1) and the lower shell (2) are welded into a whole through the first welding face (3) and the second welding face, a plasma welding seam (4) is formed between the first welding face (3) of the upper shell (1) and the second welding face of the lower shell (2), an oil filling opening (5) is formed in the side face of the lower shell (2), an oil pump opening (6) is formed in one side of the top of the upper shell (1), and the oil pump opening (6) is formed in the oil filling opening (5, go up casing (1) top opposite side and seted up gas vent (7), gas vent (7) are connected with blast pipe (8), the import of blast pipe (8) other end and FTIV valve (9) links to each other, FTIV valve (9) are installed on last casing (1).

2. The stainless steel welded fuel tank for a plug-in hybrid electric vehicle according to claim 1, characterized in that: be equipped with oil gas export and tonifying qi mouth on FTIV valve (9), the oil gas export of FTIV valve (9) passes through the entry of pipe connection carbon tank, this internal oil gas of oil tank exports to the carbon tank emission through the oil gas of FTIV valve (9), the tonifying qi mouth of FTIV valve (9) passes through the blow vent of pipe connection carbon tank to introduce the air to the oil tank body through the blow vent of carbon tank.

3. The stainless steel welded fuel tank for a plug-in hybrid electric vehicle according to claim 2, characterized in that: the export of carbon tank is connected with automobile engine, oil pump, FTIV valve (9), automobile engine are respectively through circuit connection control unit, and are controlled by control unit respectively.

4. The stainless steel welded fuel tank for a plug-in hybrid electric vehicle according to claim 1, characterized in that: the wall thickness of the upper shell (1) and the wall thickness of the lower shell (2) are both 0.7-1mm, and the width of the first welding face (3) and the width of the second welding face are not more than 5 mm.