TW201941985A - Fuel tank cap device with intake and exhaust controllable functions can control whether the outside air can enter the fuel tank, and whether the oil-gas inside the fuel tank can be discharged - Google Patents

Abstract

A fuel tank cap device with intake and exhaust controllable functions includes a seat and a fuel tank cap body that can be locked in the seat. The seat includes a first coupling portion and a second coupling portion for receiving the fuel tank cap body. A first check valve device is disposed inside the fuel tank cap body. A second check valve device is disposed on the second coupling portion of the seat. The first check valve device controls whether the outside air can enter the fuel tank, and the second check valve device controls whether the oil-gas inside the fuel tank can be discharged and is connected to an oil-gas filtering device.

Description

Fuel tank cover device with intake and exhaust control functions

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 with an intake and exhaust control function, 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 formed on A second joint portion around the first joint portion, the first joint portion includes a receiving chamber and a refueling port further extended from the receiving chamber, the second joint portion includes an installation space, and the installation space and refueling An exhaust passage extending between the ports, a fuel tank cover body may be optionally locked in the receptacle of the socket and close the fuel filler port, the fuel tank cover body includes a body, and the body includes a movable space formed in the interior and A passage extending from a lower end surface of the body to a movable space, the fuel tank cover further includes an air inlet passage extending from the outer surface to the movable space. When the fuel tank cover is locked, the fuel tank cover closes the fuel filler port, and the fuel filler port and The tank is not connected and the passage is communicated with the fuel filler port. The intake passage is in communication with the tank. When the fuel tank cover is not locked, the fuel tank is connected with the fuel tank. The chamber is connected. A first check valve device is accommodated in the movable space of the fuel tank cover. The first check valve device includes a first valve disc that can be moved to a closed position or a non-closed position. When the valve disc is in the closed position, the fuel filler port is not connected to the movable space, and when the first valve disc is in the non-closed position, the fuel filler port is connected to the movable space; and a second one-way valve device, including a housing in the installation space and A second valve disc that can be moved to a closed position or a non-closed position. When the second valve disc is in the closed position, the exhaust passage is closed, the installation space is not connected to the filler port, and when the second valve disc is in In the non-closed position, the exhaust passage is opened, and the installation space communicates with the fuel filler port. When the fuel tank cover is combined with the seat and the first valve disc is in the closed position, air outside the fuel tank cover cannot enter the fuel filler port.

When the fuel tank cover is combined with the seat and the first valve plate is in a non-closed position, air outside the fuel tank cover enters the filler port. When the fuel tank cover is combined with the seat and the second valve plate is in the closed position, the gas in the fuel port cannot When the fuel tank cover is combined with the seat and the second valve disc is in a non-closed position, the gas in the fuel filler port is discharged out of the second single valve device.

The present invention provides another fuel tank cap device with an intake and exhaust control function, including: 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 and a seat are adapted to be combined with a fuel tank port of a fuel tank, said fuel filler port is aligned with the fuel tank port, and a fuel tank cover body can be optionally locked in the first joint portion of the socket. When the body is locked in the first joint portion, the fuel filling port is closed, and a first check valve device is installed in the fuel tank cover. The first 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 portion of the bearing seat. The second check valve device is suitable for controlling whether the oil and gas in the fuel tank can be discharged.

In the present invention, a first check valve device for controlling air intake is installed in an oil tank cover body exposed (for example, exposed on the outside of a motorcycle shell), and external air can be smoothly introduced into the fuel tank when an excessive negative pressure is generated inside the fuel tank. The pressure is internally balanced, and a second non-return valve device for controlling the exhaustion is installed in a built-in seat (for example, built in the inside of a motorcycle shell), so that the conduit connected to the oil and gas filtering equipment can be hidden inside To reduce the chance of catheter damage.

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 seat 20 further includes a neck 26, and the neck 26 partitions a fuel port 32 communicating with the container chamber 24. 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 exhaust passage 37, the third joint portion 38 includes a track 40 extending from the outer surface to the receiving chamber 24, and a fixed seat 42 formed on the outer side of the third joint portion 38. The fixed seat 42 is substantially composed of It is formed by a U-shaped slot, and the fixing seat 42 is used to provide a combination of one end of a steel cable linked with a main switch lock (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 cover device 10 further includes a fuel tank cover 46 which can be locked in the socket 20. The fuel tank cover 46 includes a main body 48 and a pivot arm 68 and a hook 66 and a main body 48 formed around the outer surface of the main body 48. It further includes an upper end surface 50 and a lower end surface 52 spaced from the upper end surface 50. The body 48 further includes an intermediate surface 53 formed between the upper end surface 50 and the lower end surface 52. The upper end surface 50 includes a first step Surface 50A and a second step surface 50B located inside the first step surface 50A and at a different height from the first step surface 50A. In fact, the height of the second step surface 50B is slightly higher than the first step surface 50A. The body 46 further includes a lower joint portion 54 formed between the body 48 and the lower end surface 52 and having an outer diameter smaller than the outer diameter of the body 48. The fuel tank cover body 46 further includes an upper end surface 50 extending toward the lower end surface 52 but extending from the lower end surface 52. A partitioned movable space 56 and a passage extending from the lower end surface 52 to the movable space 56 8. The movable space 56 includes a ring groove 56A formed on a step surface. The ring groove 56A contains an O-ring 84A. The fuel tank cover 46 also includes a locking portion 57 formed in the movable space 56. Two notches 60 extending to the passage 58 are formed on the lower end surface 52 (as shown in Fig. 1). In addition, the fuel tank cover 46 includes an air inlet passage 64 extending from the middle surface 53 to the movable space 56 and the fuel tank cover 46. It also includes a plurality of groove chambers 62 formed on the lower end surface 52 and separated from the passage 58 and the movable space 56.

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. In addition, the content of the passage 58 to a leak stop 193 made of a steel ball, the leak stop 193 can plug the passage 58 when the vehicle is overturned (such as a motorcycle dumping), reducing the probability of fuel leakage in the fuel tank 137. When the general vehicle is not overturned (as shown in Figs. 4 to 8), the leakage stopper 193 will not block the passage 58.

An outer sealing ring 70 is movably sleeved on the outer side of the lower joint portion 54 of the fuel tank cover 46, and a circular sheet-shaped blocking member 72 is fixed on the lower end surface 52 of the fuel tank cover 46. Each of the grooves 62 contains a respective space. A compression spring 74 is set, and each compression spring 74 biases the outer sealing ring 70 toward the blocking member 72. When the fuel tank cover 46 is not locked in the receiving chamber 24 of the holder 20, the compression springs 74 are biased. The outer sealing ring 70 abuts on the blocking member 72 (as shown in FIG. 9).

According to the figure, the fuel tank cap device 10 includes a cap 111 and a gasket 111 covering the outer side of the fuel tank cap body 46. The cap 111 includes an outer ring wall 115 and an inner ring located inside the outer ring wall 115. Wall 113. The cover 111 is fixedly disposed on the upper end surface 50 of the fuel tank cover 46, and the sealing pad 114 is sandwiched between the inner ring wall 113 of the cover 111 and the second step surface 50B of the fuel tank cover 46, In addition, the outer ring wall 115 of the cover 111 is in close contact with the first step surface 50A of the fuel tank cover 46, so that the movable space 56 is sealed by the cover 111 (as shown in FIG. 4).

The fuel tank cover device 10 further includes a first check valve device 76 installed in the fuel tank cover body 46. The first check valve device 76 includes a first valve plate 78 and a first valve plate 78 combined with the first valve plate 78 and moving together. The first gasket 80, the first valve disc 78 and the first gasket 80 are movably accommodated in the movable space 56 (as shown in Figs. 4 and 5), and the outer diameter of the first valve disc 78 is slightly smaller than The inner diameter of the movable space 56. The first one-way valve device 76 further includes a first one-way valve cover 84 fixed on the locking portion 57 and a first one that biases the first valve plate 78 and the first gasket 80. A spring 82, the first one-way valve cover 84 includes an air inlet hole 86, and the first one-way valve cover 84 presses the O-ring 84A to form a sealed state. In essence, the first spring The 82 is biased on the first gasket 80 made of metal. The first valve disc 78 is a rubber product. The first valve disc 78 and the first gasket 80 can be moved together to a closed position (such as the fourth and fifth parts). As shown) or Non-closed position (as shown in FIG. 8), the first line of the first spring 82 biasing the valve plate 78 in the closed position.

According to the figure, the fuel tank cap device 10 further includes a second one-way valve device 88 mounted on the second joint portion 34, and the second one-way valve device 88 includes a movably received in the installation space 36. The second valve disc 90 and a second gasket 92 combined with the second valve disc 90 and moved together, in fact, the second valve disc 90 is a rubber product, the second gasket 92 is a metal product, and the second The valve disc 90 and the second gasket 92 can be moved to a closed position (as shown in FIG. 4) or a non-closed position (as shown in FIG. 7) together in the installation space 36. The outer diameter is slightly smaller than the inner diameter of the installation space 36. The second check valve device 88 further includes a second check valve cover 96 coupled to the second joint portion 34 and a second check valve cover clamped thereto. A sealing ring 99 between 96 and the end surface of the second joint portion 34. The second one-way valve cover 96 includes a mouthpiece 97 extending from the end surface and an end surface of the mouthpiece 97 extending to the mounting space 36. An air vent 98 (as shown in FIG. 5), a second spring 94 is housed between the second gasket 92 and the second one-way valve cover 96, and the second spring 94 holds the second valve disc 90 Offset with the second gasket 92 in the closed position, the seal ring 99 is used to provide a sealing connection between the second one-way valve cover 96 and the second joint portion 34. In addition, the nozzle 97 of the second one-way valve cover 96 can be connected to an oil and gas filtering device 157 by using a pipe 155. The oil and gas filtering device 157 allows the oil and gas in the fuel tank to pass through and is discharged into the atmosphere. The filtering device 157 also allows air in the atmosphere to enter the oil tank 137 through the oil and gas filtering device 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 pressure inside 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 sealed. The 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 78 of the first one-way valve device 76 is located in a closed position, and the air inlet hole 86 of the first one-way valve cover 84 is sealed. In this way, the fuel filler port 32 and the fuel tank port 151 are connected to each other. The chamber 24 of the socket 20 is not connected to each other, and the oil and gas in the fuel tank 137 cannot leak from the tank opening 151 and the filler port 32 to the chamber 24 of the socket 20 to further leak to the outside.

In addition, the second valve disc 90 of the second one-way valve device 88 is located in the closed position, so that the second valve disc 90 seals the exhaust hole 98 of the second one-way valve cover 96, so that the fuel tank port 151 and the fuel filler port 32 and The duct 155 and the oil and gas filtering equipment 157 are not connected to each other. It is worth mentioning that in a state where the first valve disc 78 is in the closed position and the second valve disc 90 is in the closed position, the pressure inside the fuel tank 137 is approximately close to the pressure outside the fuel tank 137, so the first valve disc 78 is biased in the closed position by the first spring 82, and the second valve disc 90 is biased in the closed position by the second spring 94.

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 90 covers the exhaust passage 37 (as shown in Figure 5), the pressure inside the fuel tank 137 will be transmitted to the second valve through the exhaust passage 37. On the plate 90, when the pressure inside the fuel tank 137 is higher than the elastic force of the second spring 94, the second valve plate 90 will compress the second spring 94 from the closed position closing the exhaust passage 37 to the non-closed position (such as the seventh (Shown in the figure), so that the exhaust passage 37 is opened, and the pressure (oil and gas) inside the fuel tank 137 enters the installation space 36 through the exhaust passage 37, and is further guided to the oil and gas filtering device 157 through the exhaust hole 98 and the duct 155. The oil and gas are discharged into the atmosphere after being filtered by the oil and gas filtering device 157. When the pressure inside the oil tank 137 decreases to less than the elastic force of the second spring 94, the second spring 94 biases the second valve plate 90 to return to the closed position.

Assume that the internal fuel in the fuel tank 137 causes a negative pressure inside the fuel tank 137 with the use. When the negative pressure is greater than the elastic force of the first spring 82, the first valve plate 78 compresses the first spring 82 from the closed position (as shown in FIG. (Shown) is moved to a non-closed position (as shown in FIG. 8), so that the air inlet hole 86 is opened, and the air outside the fuel tank cover device 10 enters the movable space 56 from the air inlet channel 64, and is further moved by the activity. The space 56 enters the refueling hole 32 through the passage 58 and the gap 60 and enters the interior of the fuel tank 137 through the fuel tank port 151 until the pressure inside the fuel tank 137 recovers from negative pressure to the same or close to the atmospheric pressure. The first spring 82 biases the first valve The sheet 78 is reset to the closed position together with the first gasket 80 (as shown in FIG. 5).

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 air outside the fuel tank cap device 10 can enter the fuel tank 137 through the first one-way valve device 76, and controls whether the oil and gas in the fuel tank 137 can be discharged from the fuel tank 137 through the second one-way valve device 88. 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.

According to the present invention, a first check valve device 76 for controlling air intake is installed in an oil tank cover 46 exposed (for example, exposed on the outside of a motorcycle shell), and the external air can be smoothly discharged when an excessive negative pressure is generated inside the fuel tank. It is introduced into the oil tank 137 to balance the pressure, and a second check valve device 88 for controlling the exhaustion is installed in the seat 20 built in (for example, inside the motorcycle shell), so that it is connected to the oil and gas filtering device 157. The catheter 155 can be hidden inside, reducing the probability of damage to the catheter 155.

The inner and outer ring walls 113 and 115 of the cover 111 are matched with the first and second step surfaces 50A and 50B of the upper end surface 50 of the fuel tank cover body 46 to form a step-shaped seal combination, and the air inlet channel 64 faces downward. The design can effectively prevent the water or impurities outside the fuel tank cap device 10 from entering the active space 56 and further into the fuel tank 137.

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

37‧‧‧Exhaust channel

38‧‧‧ Third Joint

40‧‧‧track

42‧‧‧Fixed

44‧‧‧ pivot

46‧‧‧ fuel tank cover

48‧‧‧ Ontology

50‧‧‧ upper end

50A‧‧‧First-order surface

50B‧‧‧Second-order surface

52 · ‧‧ lower end

53 · ‧‧Middle

54‧‧‧ lower joint

56‧‧‧ Event Space

56A‧‧‧Ring groove

57‧‧‧Locking Department

58‧‧‧ access

60‧‧‧ gap

62‧‧‧ tank room

64‧‧‧ Intake channel

66‧‧‧Hook

68‧‧‧ Pivot Arm

70‧‧‧ outer seal ring

72‧‧‧ Obstruction

74‧‧‧ Compression spring

76‧‧‧The first check valve device

78‧‧‧The first valve disc

80‧‧‧The first gasket

82‧‧‧The first spring

84‧‧‧The first one-way valve cover

84A‧‧‧O-ring

86‧‧‧Air inlet

88‧‧‧Second check valve device

90‧‧‧Second valve disc

92‧‧‧Second gasket

94 · ‧‧Second Spring

96‧‧‧Second one-way valve cover

97‧‧‧ take the mouth

98‧‧‧ exhaust hole

99‧‧‧seal ring

111 · ‧‧ cap

113 · ‧‧Inner ring wall

115 · ‧‧ Outer ring wall

117‧‧‧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

193‧‧‧Leak-proof parts

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.

Figure 6 is a sectional view taken along line 6-6 of Figure 3.

Fig. 7 is a state diagram showing that the second valve disc is displaced to a non-closed position due to an excessive oil-gas pressure inside the fuel tank.

Fig. 8 is a diagram showing a state in which the first valve disc is displaced to a non-closed position due to excessive negative pressure generated inside the fuel tank.

FIG. 9 is a state diagram of a 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 (9)

A fuel tank cap device with an intake and exhaust control function 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 periphery formed outside the first joint portion; A second joint portion, the first joint portion partitions a accommodating chamber and a refueling port further extended from the accommodating chamber, the second joint includes a mounting space and a reciprocating space extending between the mounting space and the refueling port Exhaust passage; a fuel tank cover, which can be optionally locked in the receptacle of the socket and close the fuel filler port, the fuel tank cover includes a body, the body includes a movable space formed in the interior and a lower end surface of the body A passage extending to the movable space, the fuel tank cover further includes an air inlet passage extending from the outer surface to the movable space. When the fuel tank cover is locked, the fuel tank cover closes the fuel filler opening, and the fuel filler opening is not connected with the chamber and the passage It is in communication with the fuel inlet, and the intake channel is in communication with the container. When the fuel tank cover is not locked, the fuel inlet is in communication with the container; A first check valve device is accommodated in a movable space of a fuel tank cover. The first check valve device includes a first valve disc that can be moved to a closed position or a non-closed position. In the closed position, the filler port is not connected to the movable space. When the first valve disc is in the non-closed position, the filler port is connected to the movable space; and a second one-way valve device, which is contained in the installation space and is displaceable to A second valve disc in a closed position or a non-closed position, when the second valve disc is in the closed position, the exhaust passage is closed, the installation space is not in communication with the fuel filler port, and when the second valve disc is in the non-closed position When the exhaust passage is opened, the installation space communicates with the fuel filler; When the fuel tank cover is combined with the seat and the first valve plate is in a closed position, the air outside the fuel tank cover cannot enter the fuel filler, when the fuel tank cover and the socket Combined and the first valve disc is in a non-closed position, the air outside the fuel tank cap body enters the fuel filler port, when the fuel tank cap body is combined with the seat and the second valve disc is in a closed position Addition to the location, fuel gas is not discharged through the second mouth single valve means, when the cover and the outside of the fuel tank and the second valve seat in conjunction with the non-sheet positioned in the closed position, the mouth of the fuel gas discharging valve device of the second item. According to the fuel tank cover device with air intake and exhaust control functions described in item 1 of the scope of the patent application, the first check valve device further includes: a first check valve cover fixed in the movable space of the fuel tank cover body, The first one-way valve cover includes an air inlet hole communicating with the movable space. When the first valve plate is in the closed position, the first valve plate closes the air inlet. When the first valve plate is in the non-closed position, Stomata are opened. The fuel tank cap device with the functions of intake and exhaust control as described in the second item of the patent application scope, wherein the second one-way valve device further includes: A second one-way valve cover, which is fixed on the outside of the second joint and covers the installation. Space, the second one-way valve cover further includes a nozzle and an exhaust hole extending from an end surface of the nozzle to the installation space. According to the fuel tank cover device with air intake and exhaust control functions described in the first scope of the patent application, the fuel tank cover body further includes: (1) a cover including an outer ring wall and an inner ring formed on the inner side of the outer ring wall An annular wall, the body further comprising an upper end surface and a lower end surface spaced from the upper end surface, the movable space extending from the upper end surface toward the lower end surface but separated from the lower end surface, and the passage extending from the lower end surface to the movable space The upper end surface includes a first step surface and a second step surface formed inside the first step surface and different from the first step surface. The cover is fixed on the upper end surface of the body, the outer ring wall and the first step surface. The first-order surface is in close contact, and the inner ring wall is in close contact with the second-order surface. According to the fuel tank cover device with an intake and exhaust control function according to item 4 of the scope of patent application, the body further includes an intermediate surface formed between an upper end surface and a lower end surface, and the intake passage is formed by the intermediate surface. Extend towards the upper end face to the installation space. The fuel tank cap device with air intake and exhaust control functions according to item 1 of the scope of patent application, wherein the socket further includes a neck, the neck includes an upper end located in the container room and one At the lower end, the fuel filler is divided by a neck. The lower end of the neck is accommodated in the fuel tank opening of the fuel tank. The exhaust passage extends from the installation space to the neck. The fuel tank cover further includes a sleeve on the outside. An outer seal ring, when the fuel tank cover is locked in the container's container, the outer seal ring abuts the upper end of the neck to close the fuel filler port, and when the fuel tank cover is not locked in the container's container When indoors. The outer seal ring is separated from the upper end of the neck, and the filler port is opened. The fuel tank cap device with air intake and exhaust control functions according to item 6 of the scope of the patent application, further comprising: 油 a fuel tank sealing ring, the socket further includes a lower surface and a ring formed on the lower surface and located outside the neck A groove, 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 on the seat and the fuel tank between. A fuel tank cover device with an intake and exhaust control function includes: (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 socket is suitable for being combined at the fuel tank port of a fuel tank, and the fuel filler port is aligned with the fuel tank port; A fuel tank cover body can be selectively accommodated in the first joint portion of the socket, when the fuel tank cover body is locked at When in the first joint portion, the fuel filling port is closed; a first check valve device is installed in the fuel tank cover, the first check valve device is suitable for controlling whether external air can enter the fuel tank; a second single The directional valve device is installed in the second joint part of the bearing seat. The second one-way valve device is suitable for controlling whether the oil and gas inside the fuel tank can be discharged. According to the fuel tank cover device with an intake and exhaust control function according to item 8 of the scope of the patent application, wherein the second check valve device is connected to an oil and gas filtering device, and the oil and gas inside the fuel tank is filtered by the oil and gas filtering device It is then discharged to the atmosphere.