TWI655114B - Fuel tank cap device capable of controlling intake and exhaust - Google Patents

Abstract

A fuel tank cap device capable of controlling intake and exhaust, comprising a socket and a fuel tank cover that can be locked in the socket, the socket comprising a first joint portion for accommodating the fuel tank cover body and a first a second joint portion, a first check valve device and a second check valve device are disposed inside the fuel tank cover, the first check valve device controls whether external air can enter the oil tank, and the second check valve device controls the fuel tank Whether the internal oil and gas can be discharged and connected to an oil and gas filtration device.

Description

Fuel tank cap device capable of controlling intake and exhaust

The invention relates to a fuel tank cap device, in particular to a fuel tank cap device which is installed on the outer side of the fuel tank to prevent leakage of fuel in the oil tank and prevents external moisture or impurities from entering the oil tank. The fuel tank cap device further balances the internal pressure of the fuel tank. Features.

A vehicle propelled by an internal combustion engine needs to be equipped with a fuel tank for storing fuel. In order to prevent fuel leakage and prevent external moisture or impurities from entering the fuel tank, the fuel tank cap device may be disposed at a fuel tank port of the fuel tank. The fuel tank cap device of the lock is used to close the tank mouth to prevent external moisture or impurities from entering the tank. After the fuel tank cap device is opened, fuel (such as gasoline) can be added into the tank.

The fuel tank changes internal pressure with temperature or fuel consumption. For example, when the temperature rises, the pressure inside the fuel tank also increases. When the temperature is constant, the fuel consumption causes the pressure inside the fuel tank to drop. The pressure inside the fuel tank should preferably be close to an atmospheric pressure. If the pressure is too high or the pressure is too small, it will affect the fuel supply of the internal combustion engine. For this reason, a manufacturer has developed a fuel tank cap device with a two-way valve to automatically adjust the inside of the fuel tank through the two-way valve. Pressure, however, the fuel tank cap device with a two-way valve is disposed on the fuel tank cover, but the oil and gas inside the fuel tank needs to be filtered by an oil and gas filter device to allow the gas in the fuel tank to be discharged into the atmosphere. Therefore, it is necessary to use a conduit to connect with the oil and gas filtering device. However, a conduit is provided on the exposed fuel tank cover, and a part of the conduit is also exposed outside the casing of the vehicle, which increases the probability of the conduit being damaged. And providing a conduit in the movable or rotating fuel tank cover, the conduit also affecting the fuel tank cover Moving or rotating.

In order to solve the problem, the present invention provides a fuel tank cap device capable of controlling intake and exhaust, which is installed at a tank port of a fuel tank, wherein the fuel tank cap device includes a socket including a first joint portion and is formed in the first a second joint around the outer portion of the joint, the first joint portion partitioning a chamber, the socket further comprising a neck formed on the inner side of the first joint portion, the neck portion being connected to the tank mouth a fuel filler port, the socket further comprising an installation space formed at the second joint portion and a passage extending between the installation space and the fuel filler port, the installation space including a first portion and a second portion The first portion extends between the second portion and the passage, and a fuel tank cover is selectively lockable in the chamber of the socket and closes the fuel filler opening when the fuel tank cover is not locked in the socket In the chamber, the fueling port is opened, a first one-way valve device accommodating the first portion of the installation space, and the first one-way valve device includes a displacement to a closed position or a non-closed position a first valve piece, a second check valve device housed in the second portion of the installation space, the second check valve device including a second valve piece displaceable to a closed position or a non-closed position The second valve piece includes a through hole, the first portion is closed when the second valve piece is in the closed position, and the first portion is opened when the second valve piece is in the non-closed position, and When the first valve piece is in the closed position, the first valve plate abuts against the second valve plate and closes the through hole, and when the first valve piece is in the non-closed position, the first valve piece is separated from the second valve piece and passes through The hole is open.

The fuel tank cap device of the present invention controls whether the air outside the fuel tank cap device can enter the oil tank through the first check valve device, and can control whether the oil and gas inside the fuel tank can be discharged outside the fuel tank through the second check valve device, thereby controlling the fuel tank The internal pressure value is within the proper working range and at the same time has the effect of preventing fuel leakage in the fuel tank.

The invention will be more clearly understood from the following detailed description of exemplary embodiments of the invention.

The drawings are merely for the purpose of explaining the basic teachings, and the description of the number, the position, the relationship, and the size of the components of the embodiments will be explained or the technical skills will be read after reading and understanding the following description. In addition, after reading and understanding the following descriptions, changes in the exact dimensions and size ratios associated with specific forces, weights, strengths, and similar requirements are also industry skills.

According to the drawings, the fuel tank cap device 10 of the present invention is mounted on a fuel tank 137 including an outer surface 139 and a tank port 151 formed on the outer surface (as shown in Fig. 4). The fuel tank 137 is used to store fuel, and the fuel is added from the tank port 151 to the inside of the tank 137.

The fuel tank cap device 10 includes a socket 20 fixed to the oil tank 137. The socket 20 includes a lower surface 23 and a groove 25 formed in the lower surface 23 and annular. The socket 20 further includes a ring-shaped one. A joint portion 22, the first joint portion 22 partitions a chamber 24, and the socket 20 further includes a neck portion 26 located inside the first joint portion 22, and the neck portion 26 is separated from a chamber communicating with the chamber 24. The mouth 32, the neck portion 26 further includes an upper end 28 located in the chamber 24 and a lower end 30 located outside the chamber 24. The socket 20 further includes a second joint portion 34 formed on the outside of the first joint portion 22, a third joint portion 38 and a pivot portion 44, wherein the second joint portion 34 further includes a mounting space 36 extending from the end surface thereof toward the chamber 24 but spaced apart from the chamber 24, and in the installation space 36 and refueling A passage 37 extending between the ports 32, the mounting space 36 includes a first portion 36A and a second portion 36B having an inner diameter greater than the inner diameter of the first portion 36A, and the first portion 36A is located Between the second portion 36B and the channel 37, the mounting space 36 further includes an abutment surface 36C (as shown in FIG. 4) at the junction of the first and second portions 36A, 36B, the third joint 38 includes a rail 40 extending from the outer surface to the chamber 24 and a fixing seat 42 formed outside the third joint portion 38. The fixing seat 42 is substantially constituted by a U-shaped slot, and the fixing base 42 is Used to provide a connection to one end of a cable that is interlocked with a main switch lock (not shown).

The socket 20 is fixed on the oil tank 137, the lower surface 23 of the socket 20 abuts against the outer surface 139 of the oil tank 137, and a tank sealing ring 153 is disposed in the recess 25 of the socket 20, and the tank sealing ring 153 is abutted. Relying on the outer surface 139 of the oil tank 137, the adhesion between the socket 20 and the outer surface 139 of the oil tank 137 prevents external moisture or impurities from entering the oil tank 137 from the gap between the socket 20 and the oil tank 137, in addition to the neck The lower end 30 of the portion 26 is located within the tank port 151 of the fuel tank 137 (as shown in Fig. 4).

The fuel cap assembly 10 further includes a fuel tank cover 46 that can be locked in the socket 20. The fuel tank cover 46 includes a pivot arm 68 and a hook 66. The outer side of the fuel tank cover 46 is movably sleeved outside. The seal ring 70 and a blocking member 72 disposed at the bottom, when the fuel tank cover 46 is not locked in the chamber 24 of the socket 20, the outer seal ring 70 abuts against the blocking member 72 (as shown in Fig. 8) . ).

The pivoting arm 68 of the fuel tank cover 46 is pivotally connected to the pivot portion 44 of the socket 20 such that the fuel tank cover 46 can pivotally close or open the fuel filler opening 32 relative to the socket 20 (as shown in Figures 6 and 8 ). And when the fuel filler port 32 is closed, the fuel tank port 151 is also closed.

The fuel tank cap device 10 further includes a first check valve device 211 mounted in the socket 20, the first check valve device 211 including a first valve plate 213 and a first unit that is coupled and moved together with the first valve plate 213 a spacer 215, the first valve piece 213 and the first spacer 215 are movably received in the first portion 36A of the movable space 56 (as shown in FIGS. 4 and 5), and the first valve piece 213 The outer diameter of the first check valve device 211 further includes a first spring 217 biasing the first valve piece 213 and the first spacer 215, substantially the first The spring 217 is biased on a first metal gasket 215. The first valve plate 213 is a rubber product, and the first valve plate 213 and the first gasket 215 can be displaced together to a closed position (eg, 4th, The first spring 217 biases the first valve plate 213 in the closed position, as shown in Fig. 5 or in a non-closed position (as shown in Fig. 8).

According to the drawings, the fuel cap assembly 10 further includes a second check valve device 219 mounted in the socket 20, the second check valve device 219 including a second portion movably received in the mounting space 36. a second valve piece 231 in 36B and a second gasket 235 combined with the second valve piece 231 and moving together, the second valve piece 231 is actually a rubber product, and the second gasket 235 is a metal. The second valve piece 231 and the second spacer 235 can be displaced together in the second portion 36B to a closed position (as shown in FIG. 4) or a non-closed position (as shown in FIG. 7). The outer diameter of the second valve piece 231 is slightly smaller than the inner diameter of the second portion 36B. The first valve piece 213 is substantially located between the fuel supply port 32 and the second valve piece 231. The second valve piece 231 is located between the first valve piece 213 and the outside of the socket 20.

The fuel cap assembly 10 further includes a valve cover 96 coupled to the second joint 34 and a seal ring 99 sandwiched between the valve cover 96 and the end surface of the second joint 34. The valve cover 96 includes an end surface extending a nozzle 97 and extending from the end face of the nozzle 97 to A venting opening 98 of the second portion 36B of the mounting space 36 (as shown in FIG. 5), the second check valve device 219 further includes a second venting valve 235 and a valve cover 96 a second spring 237 that biases the second valve plate 231 together with the second spacer 235 in a closed position, the seal ring 99 being used to provide a gap between the valve cover 96 and the second coupling portion 34 Sealedly combined. In addition, the nozzle 97 of the valve cover 96 can be connected to an oil and gas filtering device 157 by using a conduit 155 (as shown in FIG. 3). The oil and gas filtering device 157 allows the oil and gas inside the fuel tank to pass through and is filtered and discharged to In the atmosphere, the oil and gas filtration device 157 also allows air in the atmosphere to enter the fuel tank 137 through the oil and gas filtration device 157.

A locking mechanism 158 for locking the fuel tank cover 46 is disposed on the third joint portion 38 of the socket 20, and the locking mechanism 158 includes a rail 40 movably received in the third joint portion 38. One of the engaging members 159, the engaging member 159 includes an engaging end 171 facing the chamber 24 and a push rod 173 extending out of the outer side of the rail 40, the engaging member 159 being along The track 40 can be displaced to an engaged position of the engaging end 171 in the chamber 24 (as shown in Fig. 6) or the engaging end 171 is located in a non-engaging position in the track 40 (as shown in Fig. 8 ). .

The locking mechanism 158 further includes a handle 175 pivotally disposed on a lower surface of the third joint portion 38. The handle 175 includes a pivot portion 177 and a pull portion 179. The pull handle 175 further includes a pivot portion 177 and a pull portion 179. A push slot 191 between. The pivot portion 177 of the pull handle 175 is pivotally connected to the third joint portion 38. The push rod 173 of the engaging member 159 is combined with the pushing groove 191 of the pull handle 175, and the pulling portion 179 of the pull handle 175 is used for coupling with the steel cable. Operating the main switch lock pulls the cable to drive the pull handle 175 to pivot and further interlocks the snap member 159 to the engaged or non-engaged position.

Referring to Figures 5 and 6, for convenience of explanation, assuming that the internal pressure of the fuel tank 137 is approximately equal to an atmospheric pressure, the tank cover 46 is pivoted into the chamber 24 of the socket 20 and is locked by the locking mechanism 158. The engaging member 159 is locked (as shown in Fig. 6), and the hook 66 of the fuel tank cover 46 is blocked by the engaging end 171 of the engaging member 159, so that the fuel tank cover 46 is locked and the outer casing cover 46 is outside. The seal ring 70 abuts against the upper end 28 of the neck 26 of the socket 20, such that the fuel filler port 32 is sealed by the outer seal ring 70. Furthermore, the first valve piece 213 of the first check valve device 211 is in a closed position, and in such a state, the first valve piece 213 abuts against one side surface of the second valve piece 231 and the through hole 233 Sealed, in addition, the second valve piece 231 is placed in a closed position, and the second valve piece 231 abuts against the abutting surface 36C between the first and second portions 36A, 36B, thus the first portion 36A Closed by the second valve piece 231, the first portion 36A and the second portion 36B are not in communication with each other, such that the fuel filler port 32 and the tank port 151 are received by the first and second valve plates 213 with respect to the second portion 36B. The 231 barriers are not connected to each other, and the oil and gas in the oil tank 137 cannot enter the second portion 36B of the installation space 36 from the tank port 151 through the passage 37, and the outside air cannot enter the installation through the oil and gas filtering device 157 and the conduit 155. In the first portion 36A of the space 36, in other words, in a state where the first valve 213 is in the closed position and the second valve 231 is in the closed position, there is no airflow between the inside of the oil tank 137 and the atmosphere, and the fuel tank 137 It is completely closed.

The pressure inside the oil tank 137 may change depending on the temperature change or usage, for example, when the temperature rises, the pressure inside the oil tank 137 may increase, or when the fuel inside the oil tank 137 is consumed, the fuel tank Negative pressure is generated inside the 137. Assuming that the temperature rises so that the pressure inside the oil tank 137 rises, since the second valve piece 231 covers the first portion 36A (as shown in Fig. 5), the pressure inside the oil tank 137 is transmitted to the second valve through the passage 37. On the piece 231, when the pressure inside the oil tank 137 is much higher than the elastic force of the second spring 237, the second valve piece 231 is compressed by the closed position of the closed first portion 36A to be displaced to the non-closed position (such as 7 is shown), so that the first portion 36A is in communication with the second portion 36B, and further the pressure (oil and gas) inside the fuel tank 137 enters the second portion 36B via the passage 37, the first portion 36A, and further passes through the row. The air hole 98 and the conduit 155 are guided to the oil and gas filtering device 157, and the oil and gas is filtered by the oil and gas filtering device 157 before being discharged into the atmosphere until the pressure inside the oil tank 137 is reduced to be smaller than the elastic force of the second spring 237, the second spring The 237 biased second valve plate 231 is reset to the closed position.

It is assumed that the internal fuel of the fuel tank 137 causes a negative pressure inside the oil tank 137 as the use, and when the negative pressure is greater than the elastic force of the first spring 217, the first valve piece 213 is pressed by the atmospheric pressure to compress the first spring 217 to be closed. The position (as shown in Fig. 5) is displaced to the non-closed position (as shown in Fig. 8), causing the through hole 233 on the second valve piece 231 to be opened, and the second valve piece 231 is replaced by the second spring 237. The bias is in the closed position. In this state, since the inside of the oil tank 137 is in a negative pressure state, the pressure outside the oil tank 137 is greater than the pressure inside the oil tank 137, so that only the air in the atmosphere passes through the oil and gas filtering device 157 via the conduit 155. The first spring 217 is biased into the installation space 36 and further penetrates into the oil tank 137 through the passage 37 and the fuel filler port 32 until the pressure inside the oil tank 137 recovers from the negative pressure to be the same as or close to the atmospheric pressure, and the first spring 217 biases the first valve piece. 213 is reset to the closed position with the first shim 215 (as shown in Figure 5).

To operate the fuel tank cover 46 in an unlocked state, the main switch lock is operated to pull the cable so that the handle 175 pivots, and the further handle 175 drives the engaging member 159 to be displaced from the engaged position to the non-engaged position. Position, such that the engaging end 171 of the engaging member 159 is disengaged from the fuel tank cover The hook 66 of the 46, so that the fuel tank cover 46 is not locked by the engaging member 159, so that the fuel tank cover 46 can be pivoted away from the neck 26 relative to the socket 20, and the further oil filling port 32 and the oil tank opening 151 are opened, so that The fuel filler port 32 and the fuel tank port 151 add fuel.

The fuel tank cap device 10 of the present invention controls whether the air outside the fuel tank cap device 10 can enter the oil tank 137 through the first check valve device 211, and controls whether the oil and gas inside the oil tank 137 can be discharged into the oil tank 137 through the second check valve device 219. In addition, it is thereby possible to control the pressure value inside the oil tank 137 within a relatively appropriate working range, and at the same time, to prevent the fuel from leaking out of the oil tank 137.

The present invention mounts the first check valve device 211 that controls the availability of intake air and the second check valve device 219 that is vacant or not ventilated on the seat 20 hidden inside the vehicle (for example, a car body built in a motorcycle) The inner side can smoothly introduce the outside air into the balance pressure in the oil tank 137 when an excessive negative pressure is generated inside the fuel tank, so that the duct 155 connected to the oil and gas filtering device 157 can be hidden inside, reducing the probability of damage of the duct 155.

The basic teachings of the present invention have been described, and many extensions and variations will be apparent to those of ordinary skill in the art. For example, the fuel tank cap device 10 may not include the locking mechanism 158, and the fuel tank cap 46 may not include the pivoting arm 68, such that the outer surface of the fuel tank cap 46 and the inner surface of the socket 20 may be disposed to cooperate with each other. The thread is such that the fuel tank cap 46 can be screwed to the socket 20 to close the fuel filler opening 32.

The present invention disclosed in the specification is intended to be illustrative and not restrictive. The scope of the present invention is covered by the attached patent application. All changes to the meaning and scope of the claims are intended to be included within the scope of the invention.

10‧‧‧Cap lid device

20‧‧ ‧ socket

22‧‧‧ First Joint Department

23‧‧‧ Lower surface

24‧‧ ‧ room

25‧‧‧ Groove

26‧‧‧ neck

28‧‧‧Upper

30‧‧‧Bottom

32‧‧‧ fuel filler

34‧‧‧Second junction

36‧‧‧Installation space

36A‧‧‧Part 1

36B‧‧‧Part 2

36C‧‧‧Abutment

37‧‧‧ channel

38‧‧‧ Third Joint Department

40‧‧‧ Track

42‧‧‧ fixed seat

44‧‧‧Band

46‧‧‧ fuel tank cover

66‧‧‧ hook

68‧‧‧ pivot arm

70‧‧‧ outer seal ring

72‧‧‧blocking parts

96‧‧‧ valve cover

97‧‧‧ mouthpiece

98‧‧‧ venting holes

99‧‧‧Seal ring

137‧‧‧ fuel tank

139‧‧‧ outer surface

151‧‧‧ tank mouth

153‧‧‧Cap seal ring

155‧‧‧ catheter

157‧‧‧ oil and gas filtration equipment

158‧‧‧Locking mechanism

159‧‧‧Clamps

171‧‧‧Card end

173‧‧‧Put

175‧‧‧ handle

177‧‧‧Band

179‧‧‧ Pulling Department

191‧‧‧ push slot

211‧‧‧First check valve device

213‧‧‧First valve

215‧‧‧First gasket

217‧‧‧First spring

219‧‧‧Second check valve device

231‧‧‧Second valve

233‧‧‧through hole

235‧‧‧second gasket

237‧‧‧Second spring

Fig. 1 is an exploded perspective view showing the elevation of the fuel tank cap of the fuel tank cap device of the present invention.

Fig. 2 is an exploded perspective view of the fuel tank cap device of the present invention.

Figure 3 is a perspective assembled view of the fuel tank cap device of the present invention.

Figure 4 is a cross-sectional view taken along line 4-4 of Figure 3.

Fig. 5 is a cross-sectional view taken along line 5-5 of Fig. 3.

Figure 6 is a diagram showing the state in which the oil pressure inside the fuel tank is too large to cause the second valve plate to shift to the non-closed position.

Fig. 7 is a view showing a state in which the negative pressure generated inside the fuel tank is too large to cause the first valve piece to be displaced to the non-closed position.

Fig. 8 is a view showing a state in which the fuel tank cap of the fuel tank cap device of the present invention is not locked and opened.

In the different figures, the same reference numerals are used to designate the same or similar elements; in addition, please refer to the text such as "top", "bottom", "first", "second", "forward", "backward", "reverse" To "," "front", "back", "height", "width", "length", "end", "side", "horizontal", "vertical", etc. and similar terms are only for the reference of the viewer The constructions in the figures are only used to aid in the description of the embodiments.

Claims (4)

A fuel tank cap device capable of controlling intake and exhaust, installed in a fuel tank port of a fuel tank, wherein the fuel tank cap device comprises: a socket comprising a first joint portion and a first portion formed on an outer surface of the first joint portion a second joint portion, the first joint portion is separated by a chamber, the socket further comprises a neck formed on the inner side of the first joint portion, and the neck portion is separated from a fuel filler port connected to the tank mouth, and the socket is further The invention includes an installation space formed in the second joint portion and a passage extending between the installation space and the fuel filler port, the installation space including a first portion and a second portion, wherein the first portion is in the first portion Extending between the two portions and the passage; a fuel tank cover selectively slidable in the chamber of the socket and closing the fuel filler opening, when the fuel tank cover is not locked in the housing of the socket The fuel filler opening is opened; a first one-way valve device is received in the first portion of the installation space, and the first one-way valve device includes a first valve piece that is displaceable to a closed position or a non-closed position; First a check valve device housed in the second portion of the installation space, the second check valve device including a second valve piece displaceable to a closed position or a non-closed position, the first valve piece being located at the refueling Between the mouth and the second valve piece, the second valve piece is located between the first valve piece and the outside of the socket, the second valve piece comprises a through hole, and when the first valve piece is in the closed position, the first valve piece Abutting against the second valve plate and closing the through hole, the outside air of the bearing cannot enter the oil tank through the installation space and the passage. When the first valve piece is in the non-closed position, the first valve piece is separated from the second valve piece and passes through When the hole is opened, the external air of the bearing enters the oil tank through the installation space and the passage. When the second valve piece is in the closed position, the pressure in the oil tank cannot be discharged through the passage and the installation space, when the second valve piece is in the non-closed position, The pressure inside the fuel tank is discharged through the passage and the installation space. The fuel tank cap device capable of controlling intake and exhaust as described in claim 1, further comprising: a valve cover fixed to the outside of the second joint and covering the installation space, the valve cover further comprising a nozzle and Extending from the end face of the mouth to a venting opening in the second portion of the mounting space, the mouthpiece is adapted to be coupled to an oil and gas filtering device. The fuel tank cap device capable of controlling intake and exhaust according to claim 1, wherein the neck of the socket comprises an upper end located in the chamber and a lower end located on the side of the housing, the lower end of the neck Accommodating in a fuel tank port of the oil tank, the passage extending from the installation space to the neck, the fuel tank cover further comprising an outer seal ring sleeved on the outer side, when the fuel tank cover is locked in the housing of the seat, The outer seal ring abuts against the upper end of the neck to close the fuel filler port when the fuel tank cap is not locked in the receptacle chamber. The outer seal ring is spaced from the upper end of the neck and the fuel filler opening is open. The fuel tank cap device capable of controlling intake and exhaust as described in claim 3, further comprising: a tank seal ring, the socket further comprising a lower surface and a ring formed on the lower surface and located outside the neck a recess in which the tank seal ring is mounted, the tank further comprising an outer surface, the tank port being formed on the outer surface, the tank seal ring abutting snugly between the socket and the tank .