TW201941984A - Fuel tank cap device capable of controlling intake and exhaust including a receiving base and a fuel tank cap body - Google Patents

Abstract

A fuel tank cap device capable of controlling intake and exhaust includes a receiving base and a fuel tank cap body that can be locked in the receiving base. The receiving base includes a first joint portion for accommodating the fuel tank cap body and a second joint portion. A first check valve device and a second check valve device are disposed inside the fuel tank cap body. The first check valve device controls and determines whether external air can enter the fuel tank. The second check valve device controls and determines whether the oil-gas inside the fuel tank can be discharged, and is connected to an oil-gas filtering 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 installed outside the fuel tank to prevent fuel in the fuel tank from leaking out and to prevent external moisture or impurities from entering the fuel tank. The fuel tank cap device further has a function of balancing the internal pressure of the fuel tank. Features.

A vehicle propelled by an internal combustion engine needs to be equipped with a fuel tank to store fuel. In order to prevent fuel leakage and prevent external moisture or impurities from entering the fuel tank, a fuel tank cap device is provided at a fuel tank mouth of the fuel tank, which can be installed The locked fuel tank cap device is used to tightly seal the fuel tank port to prevent external moisture or impurities from entering the fuel tank. After opening the fuel tank cap device, fuel (such as gasoline) can be added into the fuel tank.

The internal pressure of the fuel tank changes with the temperature or fuel consumption. For example, when the temperature rises, the pressure inside the fuel tank will increase. Consuming fuel under the condition of constant temperature will cause the pressure inside the fuel tank to drop. However, The pressure inside the fuel tank should preferably be close to an atmospheric pressure. If the pressure is too high or too low, it will affect the fuel supply of the internal combustion engine. For this reason, some companies have developed a fuel tank cap device with a two-way valve. Pressure, however, the fuel tank cap device with the two-way valve is provided on the fuel tank cover, but the oil and gas in the fuel tank needs to be filtered by an oil and gas filtering device before the gas in the fuel tank is allowed to be discharged to the atmosphere. Therefore, a duct needs to be used to connect to the oil and gas filtering equipment. However, a duct must be provided on the exposed fuel tank cover, and a part of the duct will also be exposed outside the vehicle's housing. This will increase the probability of the duct being damaged. , And a duct is provided in the movable or rotating fuel tank cover, and the duct also affects the fuel tank cover Moving or rotating.

In order to solve this problem, the present invention provides a fuel tank cap device capable of controlling intake and exhaust, which is installed at a fuel tank port of a fuel tank, wherein the fuel tank cap device includes a socket, including a first joint portion, and is formed at the first A second joint portion around a joint portion, the first joint portion partitions a compartment, and the seat further includes a neck formed on the inner side of the first joint portion, and the neck segment is connected with the fuel tank port. A filler port, the socket further comprises a mounting space formed in the second joint portion and a passage extending between the mounting space and the filler port, the mounting space includes a first part and a second part, so The first part extends between the second part and the channel. An oil tank cover can be locked in the receptacle of the socket and close the fuel filler. When the fuel tank cover is not locked in the socket, When in the container chamber, the fuel filler opening is opened, and a first check valve device accommodates the first part of the installation space. The first check valve device includes a valve that can be moved to a closed position or a non-closed position. A first valve disc and a second check valve device are accommodated in the second part of the installation space. The second check valve device includes a second valve disc that can be moved to a closed position or a non-closed position. The second valve disc includes a through hole, when the second valve disc is in the closed position, the first portion is closed, and when the second valve disc is in the non-closed position, the first portion is opened, and When the first valve disc is in the closed position, the first valve disc abuts on the second valve disc and closes the through hole. When the first valve disc is in the non-closed position, the first valve disc is separated from the second valve disc and communicates with it. The hole is opened.

The fuel tank cap device of the invention controls whether the air outside the fuel tank cap device can enter the fuel tank through the first check valve device, and controls whether the oil and gas in the fuel tank can be discharged out of the fuel tank through the second check valve device, thereby controlling the fuel tank The internal pressure value is in a more suitable operating range, and at the same time, it also has the effect of preventing fuel leakage from the fuel tank.

The invention will be understood more clearly from the detailed description which illustrates illustrative embodiments of the invention in conjunction with the drawings.

All the drawings are only for explaining the basic teaching, and the number, position, relationship, and size of the elements constituting the illustrative embodiment will be explained in the drawings or belong to the industry skills after reading and understanding the following description. In addition, after reading and understanding the following description, it is also an industry skill to change the precise dimensions and size ratios to match specific forces, weights, strengths, and similar requirements.

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

The fuel tank cap device 10 includes a socket 20 fixed on the fuel tank 137. The socket 20 includes a lower surface 23 and a ring-shaped groove 25 formed on the lower surface 23. The socket 20 includes a ring-shaped one. The first joint portion 22, the first joint portion 22 partitions a container chamber 24, and the socket 20 further includes a neck portion 26 located inside the first joint portion 22, and the neck portion 26 partitions a portion which communicates with the container chamber 24. Filling port 32. The neck 26 further includes an upper end 28 located in the accommodation chamber 24 and a lower end 30 located outside the accommodation chamber 24. The socket 20 further includes a second joining part 34 and a third joining part formed outside the first joining part 22. The second joint portion 34 further includes a mounting space 36 extending from an end surface of the second joint portion 34 toward the container chamber 24 but spaced from the container chamber 24, and between the mounting space 36 and the fuel filler port 32. An extended channel 37, the installation space 36 includes a first portion 36A and a second portion 36B having an inner diameter larger than the inner diameter of the first portion 36A, and the first portion 36A is located in the second portion Between 36B and channel 37, the installation space 36 further includes an abutment surface 36C at the junction of the first and second portions 36A, 36B, and the third joint portion 38 includes an extension extending from the outer surface to the accommodation chamber 24. The rail 40 and a fixed base 42 formed on the outer side of the third joint portion 38 are substantially the same. U-shaped slot formed in the fixing base 42 provided to one end of the line for connection with one of a main cable latch interlock switch (not shown).

The socket 20 is fixed on the fuel tank 137, the lower surface 23 of the socket 20 is abutted against the outer surface 139 of the fuel tank 137, and a fuel tank sealing ring 153 is set in the groove 25 of the socket 20, and the fuel tank sealing ring 153 abuts Lean against the outer surface 139 of the fuel tank 137, so that the seat 20 and the outer surface 139 of the fuel tank 137 are in close contact to prevent external moisture or impurities from entering the fuel tank 137 from the gap between the seat 20 and the fuel tank 137. In addition, the neck The lower end 30 of the section 26 is located in the fuel tank port 151 of the fuel tank 137 (as shown in FIG. 4).

The fuel tank cap device 10 further includes a fuel tank cap body 46 which can be locked in the socket 20. The fuel tank cap body 46 includes a pivoting arm 68 and a hook 66, and an outer side of the fuel tank cap body 46 is movably sleeved on an outer side. The sealing ring 70 and a blocking member 72 provided at the bottom. When the fuel tank cover 46 is not locked in the receiving chamber 24 of the seat 20, the outer sealing ring 70 abuts on the blocking member 72 (as shown in FIG. 9). ).

The pivot arm 68 of the fuel tank cover 46 is pivotally connected to the pivot portion 44 of the socket 20, so that the fuel tank cover 46 can pivot to close or open the fuel filler port 32 relative to the socket 20 (as shown in Figures 6 and 9) , 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 installed in the seat 20, and the first check valve device 211 includes a first valve plate 213 and a first valve plate combined with the first valve plate 213 and moving together. A gasket 215, the first valve plate 213 and the first gasket 215 are movably accommodated in the first part 36A of the movable space 56 (as shown in Figures 4 and 5), and the first valve plate 213 The outer diameter of the first portion is slightly smaller than the inner diameter of the first portion 36A. The first check valve device 211 further includes a first spring 217 that biases the first valve plate 213 and the first washer 215. In essence, the first The spring 217 is biased on the first gasket 215 made of metal, 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 (such as the fourth, 5) or a non-closed position (as shown in FIG. 8), the first spring 217 biases the first valve plate 213 in the closed position.

According to the figure, the fuel tank cap device 10 further includes a second check valve device 219 installed in the seat 20, and the second check valve device 219 includes a second part movably received in the installation space 36. A second valve plate 231 in 36B and a second gasket 235 combined with and moving with the second valve plate 231. In fact, the second valve plate 231 is a rubber product, and the second gasket 235 is a metal. Products, the second valve plate 231 and the second gasket 235 can be moved to a closed position (as shown in FIG. 4) or a non-closed position (as shown in FIG. 7) in the second part 36B. The outer diameter of the second valve plate 231 is slightly smaller than the inner diameter of the second portion 36B.

The fuel tank cap device 10 further includes a valve cover 96 coupled to the second joint portion 34 and a sealing ring 99 sandwiched between the valve cover 96 and an end surface of the second joint portion 34. The valve cover 96 includes an end surface extending from the end surface. A mouthpiece 97 and an exhaust hole 98 (shown in FIG. 5) extending from the end face of the mouthpiece 97 to the second part 36B of the installation space 36 (as shown in FIG. 5), the second check valve device 219 further includes a housing A second spring 237 between the second gasket 235 and the valve cover 96, said second spring 237 biases the second valve plate 231 and the second gasket 235 together in the closed position, and said seal ring 99 is used To provide a sealing connection between the valve cover 96 and the second joint portion 34. In addition, the nozzle 97 of the valve cover 96 can be connected to an oil and gas filtering device 157 using a pipe 155 (as shown in FIG. 3). The oil and gas filtering device 157 allows the oil and gas in the fuel tank to pass through and is discharged to In the atmosphere, the oil and gas filtering equipment 157 also allows air in the atmosphere to enter the oil tank 137 through the oil and gas filtering equipment 157.

A locking mechanism 158 is provided on the third joint portion 38 of the socket 20 for locking the fuel tank cover 46. The locking mechanism 158 includes a track 40 movably received in the third joint portion 38. One of the engaging members 159 and 159 includes an engaging end 171 facing the container 24 and a push rod 173. The push rod 173 extends out of the outer side of the track 40, and the engaging member 159 is along the The track 40 can be moved to an engaging position where the engaging end 171 is located in the chamber 24 (as shown in FIG. 6) or a non-engaging position where the engaging end 171 is located in the track 40 (as shown in FIG. 9). .

The locking mechanism 158 further includes a pull handle 175 pivotally disposed on the lower surface of the third joint portion 38. The pull 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 between 191. 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 push groove 191 of the pull handle 175. The pull portion 179 of the pull handle 175 is used to be combined with the steel cable. Operating the main switch lock to pull the steel cable can drive the handle 175 to pivot and further link the engaging member 159 to the engaging position or the non-engaging position.

Refer to Figures 5 and 6. For the convenience of explanation, it is assumed that the internal pressure of the fuel tank 137 is approximately equal to an atmospheric pressure. The fuel tank cover 46 is pivoted into the receiving chamber 24 located in 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 surface of the fuel tank cover 46 is locked. The seal ring 70 abuts closely against the upper end 28 of the neck 26 of the socket 20, so that the fuel filler port 32 is sealed by the outer seal ring 70. Furthermore, the first valve plate 213 of the first check valve device 211 is located in a closed position. In this state, the first valve plate 213 is abutted against a side surface of the second valve plate 231 and the through hole 233 is formed. In addition, the second valve plate 231 is in the closed position, and the second valve plate 231 is in close contact with the abutment surface 36C between the first and second portions 36A and 36B. Therefore, the first portion 36A It is closed by the second valve plate 231. In this way, the filler port 32 and the fuel tank port 151 are blocked by the first and second valve plates 213 and 231 with respect to the second portion 36B. The oil and gas in the oil tank 137 cannot be connected. From the tank port 151 through the channel 37 and into the second part 36B of the installation space 36, and the outside air cannot enter the first part 36A of the installation space 36 through the oil and gas filtering equipment 157 and the duct 155. In other words, in With the first valve 213 in the closed position and the second valve 231 in the closed position, the interior of the fuel tank 137 and the atmosphere There will be no gas flow communication between the fuel tank 137 is completely closed.

The pressure inside the fuel tank 137 will change with the temperature change or different usage conditions. For example, when the temperature rises, the pressure inside the fuel tank 137 will increase as the temperature rises, or when the fuel inside the fuel tank 137 is consumed, the fuel tank Negative pressure will be generated inside the 137. Assume that the temperature rises inside the fuel tank 137. Since the second valve disc 231 covers the first part 36A (as shown in FIG. 5), the pressure inside the fuel tank 137 will be transmitted to the second valve disc through the passage 37. On 231, when the pressure inside the fuel tank 137 is higher than the elastic force of the second spring 237, the second valve plate 231 will compress the second spring 237 from the closed position closing the first portion 36A to the non-closed position (such as the seventh (Shown in the figure), so that the first part 36A communicates with the second part 36B, and further the pressure (oil and gas) inside the oil tank 137 enters the second part 36B through the channel 37, the first part 36A, and further passes through the exhaust. The hole 98 and the duct 155 lead to the oil and gas filtering device 157, and the oil and gas are discharged to the atmosphere after being filtered by the oil and gas filtering device 157, and when the pressure inside the oil tank 137 decreases to less than the elastic force of the second spring 237, the second spring 237 The biased second valve plate 231 is reset to the closed position.

Assume that the internal fuel in the fuel tank 137 causes a negative pressure inside the fuel tank 137 as the fuel is used. When the negative pressure is greater than the elastic force of the first spring 217, the first valve plate 213 is compressed by the atmospheric pressure and the first spring 217 is closed. The position (as shown in FIG. 5) is shifted to the non-closed position (as shown in FIG. 8), which causes the through hole 233 on the second valve plate 231 to be opened, and the second valve plate 231 by the second spring 237 Offset in the closed position. In this state, the internal pressure of the fuel tank 137 is negative, so the pressure outside the fuel tank 137 is greater than the pressure inside the fuel tank 137, so it will only cause air in the atmosphere to pass through the oil and gas filter device 157 and via the duct 155 It is conveyed to the installation space 36 and further enters the fuel tank 137 through the passage 37 and the fuel filler port 32 until the pressure inside the fuel tank 137 recovers from negative pressure to the same or close to the atmospheric pressure. The first spring 217 biases the first valve plate 213 and the first gasket 215 reset to the closed position (such as the fifth Shown).

In order to operate the fuel tank cover 46 in an unlocked state, the main switch lock is operated to pull the cable to pivot the handle 175, and the handle 175 is further driven to move the engaging member 159 from the engaging position to the non-engaging position. Position, so that the engaging end 171 of the engaging member 159 is released from the hook 66 of the fuel tank cover 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 relative to the seat 20 away from the neck Part 26, the fuel filler port 32 and the fuel tank port 151 are further opened, so that fuel can be added through the fuel filler port 32 and the fuel tank port 151.

The fuel tank cap device 10 of the present invention controls whether the air outside the fuel tank cap device 10 can enter the fuel tank 137 through the first check valve device 211, and controls whether the oil and gas in the fuel tank 137 can be discharged from the fuel tank 137 through the second check valve device 219 In addition, the pressure value inside the fuel tank 137 can be controlled within a more appropriate operating range, and at the same time, the effect of preventing fuel leakage from the fuel tank 137 is also achieved.

In the present invention, the first check valve device 211 that controls the intake or not and the second check valve device 219 that is vacant or not can be installed on the seat 20 hidden in the interior of the vehicle (for example, built in a motorcycle shell (Inside), it can smoothly introduce external air into the oil tank 137 to balance the pressure when excessive negative pressure is generated inside the fuel tank, so that the duct 155 connected to the oil and gas filtering equipment 157 can be hidden inside, reducing the probability of the duct 155 being damaged.

The basic teachings of the present invention have been described, and many extensions and variations will be apparent to those skilled in the art. For example, the fuel tank cap device 10 may not include a locking mechanism 158, and the fuel tank cap body 46 may not include a pivoting arm 68. Thus, the outer surface of the fuel tank cap body 46 and the inner surface of the seat 20 may be provided to cooperate with each other. Thread, so that the fuel tank cover 46 and the socket 20 can be provided with a closed fuel filler port 32.

Since the present invention disclosed in the specification can be implemented in other specific forms without departing from the spirit or general characteristics of the present invention, and some forms of these specific forms have been pointed out, the embodiments disclosed in the specification should be regarded as illustrative rather than limiting. The scope of the present invention is defined by the scope of the attached patent application, not by the above description. All changes that fall within the meaning and scope of the scope of the patent application will still be included in the scope of the invention.

10‧‧‧ Fuel tank cap device

20‧‧‧ seat

22‧‧‧ the first joint

23‧‧‧ lower surface

24‧‧‧capacity room

25‧‧‧ groove

26‧‧‧ neck

28‧‧‧ upper end

30‧‧‧ lower end

32‧‧‧ filler

34‧‧‧ the second joint

36‧‧‧Installation space

36A‧‧‧Part I

36B‧‧‧Part Two

36C‧‧‧Abutting surface

37‧‧‧ channel

38‧‧‧ Third Joint

40‧‧‧track

42‧‧‧Fixed

44‧‧‧ pivot

46‧‧‧ fuel tank cover

66‧‧‧Hook

68‧‧‧ Pivot Arm

70‧‧‧ outer seal ring

72‧‧‧ Obstruction

96‧‧‧ Valve cover

97‧‧‧ take the mouth

98‧‧‧ exhaust hole

99‧‧‧seal ring

137‧‧‧ fuel tank

139‧‧‧outer surface

151‧‧‧ Fuel tank port

153‧‧‧Sealing ring

155‧‧‧ Catheter

157‧‧‧oil and gas filtration equipment

158‧‧‧Locking mechanism

159‧‧‧ Engagement

171‧‧‧ Engagement ends

173‧‧‧Put

175‧‧‧Handle

177‧‧‧ pivot

179‧‧‧Pull

1911 ‧ ‧ push the trough

2111‧‧‧The first check valve device

213‧‧‧The first valve disc

215‧‧‧The first gasket

217‧‧‧First spring

219‧‧‧Second check valve device

231‧‧‧Second valve disc

233‧‧‧through hole

235‧‧‧Second gasket

237‧‧‧Second Spring

FIG. 1 is a perspective exploded perspective view of a fuel tank cover of a fuel tank cap device according to the present invention.

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

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

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

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

Fig. 6 is a state diagram showing that the second valve disc is displaced to a non-closed position due to excessive oil pressure inside the fuel tank.

Figure 7 is a diagram showing the state where the first valve disc is displaced to a non-closed position due to the excessive negative pressure generated inside the fuel tank.

FIG. 8 is a state diagram of the fuel tank cover device of the fuel tank cover device of the present invention after it is unlocked and opened.

The same reference numerals are used to indicate the same or similar elements in different drawings; please also understand the text such as "top", "bottom", "first", "second", "forward", "backward", "reverse" "Forward", "front", "back", "height", "degree", "length", "end", "side", "horizontal", "vertical", etc. The structure is referred to in the drawings and is only used to help describe the illustrative embodiment.

Claims (6)

A fuel tank cap device capable of controlling intake and exhaust is installed at a fuel tank port of a fuel tank, wherein the fuel tank cap device includes: (1) a socket, including a first joint portion and a first joint portion formed around the first joint portion; Two joint parts, the first joint part separates a container, the socket further includes a neck formed on the inner side of the first joint part, and the neck part separates a fuel inlet connected with the fuel tank port, and the socket further includes An installation space formed at the second joint portion and a channel extending between the installation space and the filler port, the installation space includes a first part and a second part, and the first part is in the second Extending between the part and the channel; A fuel tank cover can be locked in the receptacle of the socket and close the fuel filler port. When the fuel tank cover is not locked in the receptacle of the socket, the refueling The port is opened; a first check valve device, which accommodates the first part of the installation space, the first check valve device includes a first valve that can be moved to a closed position or a non-closed position ; A second check valve device, housed in the second part of the installation space, the second check valve device includes a second valve disc, a second valve disc that can be moved to a closed position or a non-closed position Including a through hole, the first part is closed when the second valve disc is in the closed position, the first part is opened when the second valve disc is in the non-closed position, and when the first valve disc is When in the closed position, the first valve disc abuts on the second valve disc and closes the through hole. When the first valve disc is in the non-closed position, the first valve disc is separated from the second valve disc and the through hole is opened. The fuel tank cover device capable of controlling intake and exhaust as described in item 1 of the scope of patent application, further comprising: a valve cover fixed on the outside of the second joint portion and covering the installation space, the valve cover further including a nozzle and An exhaust hole extending from the end face of the nozzle to the second part of the installation space, said nozzle is suitable for connecting with an oil and gas filtering device. The fuel tank cap device capable of controlling intake and exhaust as described in the first scope of the patent application, wherein the neck of the socket includes an upper end located inside the container and a lower end located outside the container, and the lower end of the neck It is accommodated in the fuel tank port of the fuel tank, the passage extends from the installation space to the neck, and the fuel tank cover further includes an outer sealing ring sleeved on the outside. When the fuel tank cover is locked in the receiving chamber of the holder, The outer sealing ring abuts against the upper end of the neck to close the fuel filler opening, when the fuel tank cover is not locked in the receiving chamber of the bearing seat. The outer seal ring is separated from the upper end of the neck, and the filler port is opened. The fuel tank cap device capable of controlling intake and exhaust as described in item 3 of the scope of patent application, further comprising: a fuel tank sealing ring, the seat further includes a lower surface and a ring-shaped ring formed on the lower surface and located outside the neck A groove, wherein a fuel tank sealing ring is installed in the groove, the fuel tank further includes an outer surface, the fuel tank opening is formed on the outer surface, and the fuel tank sealing ring abuts closely between the bearing seat and the fuel tank . A fuel tank cover device capable of controlling intake and exhaust, comprising: (1) a socket including a first joint portion and a second joint portion formed outside the first joint portion; the first joint portion includes a fuel filler port; The seat is adapted to be combined at the fuel tank port of a fuel tank, the fuel filler port is aligned with the fuel tank port, and the socket further includes a second joint part formed on the first joint part; It is placed in the first joint part of the seat, and when the fuel tank cover is locked in the first joint part, the fuel filler port is closed; 第一 A first check valve device is installed in the second joint part of the seat. A check valve device is suitable for controlling whether external air can enter the fuel tank; A second check valve device is installed in the second joint of the bearing seat, and the second check valve device is suitable for controlling the oil and gas in the fuel tank. discharge. According to the fuel tank cover device capable of controlling intake and exhaust as described in item 8 of the scope of patent application, wherein the second one-way valve device is connected to an oil and gas filtering device, after the oil and gas inside the fuel tank is discharged through the oil and gas filtering device, Before being discharged to the atmosphere.