JPH06239149A - Liquefied gas car and gas apparatus installed in liquefied gas car - Google Patents

Abstract

PURPOSE:To provide a liquefied gas car in which a gas apparatus can be handled in the same way as handling a gas apparatus in normal living in a household and the like, by using a liquefied gas as the fuel of the internal combustion engine, and feeding the liquefied gas from a gas cylinder to store the liquefied gas in the gas apparatus. CONSTITUTION:A gas apparatus 33 is equipped to a camping car 1 in which a liquefied gas stored in a gas cylinder 3 is fed to the internal combustion engine 7. The liquefied gas is fed to the gas apparatus 33 from the gas cylinder 3.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a liquefied gas vehicle equipped with various gas appliances.

[0002]

2. Description of the Related Art An example of a conventional camping car is shown in FIG. The camper 71 has a power fuel tank 7
2 is provided, and gasoline or light oil fuel is supplied from a power fuel inlet 73 formed in the power fuel tank 72. In addition, this power fuel tank 72
Is connected to an internal combustion engine 75 via a fuel passage 74. The internal combustion engine 75 is connected to the drive wheels 77 via the shaft 76 and the like. Further, driven wheels 78 are connected to the front part of the camper 71.

A gas stove 79 is provided in the camper 71. The gas stove 79 can perform various cooking by supplying gas from the cassette type LPG cylinder 80.

Further, the camping car 71 is provided with a simple shower room 81. The simple shower room 81 is configured such that water stored in a water tank 82 installed outside the camper 71 is pumped up by a pump 83 and discharged from a shower 84.

[0005]

However, the current camping car 71 is equipped with the gas stove 79 for cooking. Since the gas stove 79 uses the cassette type LPG cylinder 80, There is a problem that only simple cooking can be done.

Further, in the case of using a simple shower, for example, the water discharged from the shower 84 is cold water, and it has been difficult to make it a hot water shower. That is, when hot water is used for the shower, the heat of the radiator (not shown) must be used. Therefore, there is a problem that the use of hot water is limited during engine operation. Further, especially in campgrounds and the like, there are problems that it is difficult to use hot water because there are many places where warm-up operation of the engine is prohibited.

The present invention has been made in order to solve the above problems, and its purpose is to use the fuel of an internal combustion engine as a liquefied gas and to supply the liquefied gas from a cylinder storing the liquefied gas to a gas device. Accordingly, it is an object of the present invention to provide a liquefied gas vehicle that can handle a gas device in the same manner as a gas device in a normal life such as home and a gas device equipped in the liquefied gas car.

[0008]

In order to solve the above problems, a first aspect of the present invention is a liquefied gas vehicle in which liquefied gas stored in a cylinder is supplied to an internal combustion engine, which is equipped with gas equipment.
The gist of the invention is to supply liquefied gas from the cylinder to the gas equipment.

A second aspect of the present invention is a liquefied gas vehicle in which a communication pipe for supplying the liquefied gas is connected to a cylinder storing the liquefied gas, and the communication pipe is connected to an internal combustion engine through a vaporizer. The gist of the invention is to provide a vaporized fuel supply pipe for supplying the liquefied gas vaporized in the cylinder or vaporized by the vaporizer to the gas equipment in the cylinder or the vaporizer.

[0010]

Therefore, according to the first aspect of the invention, the various gas appliances provided in the liquefied gas vehicle are supplied with the liquefied gas from the same cylinder as the cylinder for supplying the liquefied gas to the internal combustion engine.

In the second invention, the liquefied gas stored in the cylinder is supplied to the communication pipe. Then, the liquefied gas supplied to the communication pipe is vaporized by the vaporizer and supplied to the internal combustion engine. On the other hand, the liquefied gas vaporized in the cylinder or vaporized by the vaporizer is supplied to the gas equipment via the vaporized fuel supply pipe.

[0012]

【Example】

(First Embodiment) A first embodiment in which the present invention is embodied in a camping car will be described below with reference to FIGS.

FIG. 1 shows a side surface of a camper 1. A cylinder chamber 2 is formed on a side portion of the camper 1. The camper 1 is provided with driving wheels 1a and driven wheels 1b.

As shown in FIGS. 2 and 3, the cylinder chamber 2 accommodates a cylinder 3 in which liquid LPG fuel is stored. At this time, the liquefied LPG fuel is stored in the lower portion of the cylinder 3 and the vaporized LPG fuel is filled in the upper portion thereof. The cylinder 3 is provided with a liquefied fuel take-out valve 4 for taking out the liquefied LPG fuel, a vaporized fuel take-out valve 5 for taking out the vaporized LPG fuel, and a liquefied fuel injection valve (not shown).

A first communication pipe 6 as a communication pipe is connected to the liquefied fuel extraction valve 4, and the first communication pipe 6 is connected to an internal combustion engine 7. That is, by opening and closing the liquefied fuel extraction valve 4, the amount of liquefied LPG fuel supplied to the first communication pipe 6 is adjusted.

A filter 8 is attached to the first communication pipe 6.
Is provided and the filter 8 is adapted to filter mixed impurities such as iron rust and dust mixed in the liquefied LPG fuel.

Further, in the first communication pipe 6, a vaporizer 9 is connected to the internal combustion engine 7 side (downstream side) of the filter 8 via a solenoid valve (not shown). The vaporizer 9 is configured to vaporize the liquefied LPG fuel filtered by the filter 8 under reduced pressure and maintain it at a constant pressure, and adjust the vaporization amount according to the increase or decrease of the load of the internal combustion engine 7.

FIG. 4 shows the basic structure of the vaporizer 9. The inside of the casing 10 forming the vaporizer 9 is divided into a first decompression chamber 12 and a second decompression chamber 13 by a partition wall 11. A communication passage 14 that communicates with the first pressure reducing chamber 12 and the second pressure reducing chamber 13 is provided in a part of the partition wall 11.

An inlet passage 15 is formed in the first decompression chamber 12, one end of which is connected to the first communication pipe 6. In addition, the other end of the entrance passage 15 has a primary
A valve 16 is provided. This primary valve 16 is connected to a primary valve lever 17. Then, the primary valve lever 17 rotates about the fulcrum 17a, whereby the primary valve lever 17 is rotated.
While the valve 16 opens and closes the other end of the inlet passage 15,
The opening is adjusted.

Further, the first decompression chamber 12 is provided with a primary diaphragm 18. A compression spring 19 is interposed between the primary diaphragm 18 and the inner wall of the casing 10 to urge the primary diaphragm 18 toward the first decompression chamber 12 side (right side in the drawing). At this time, the primary diaphragm 18 is provided so as to be interlocked with the primary valve lever 17.

That is, after the liquid fuel take-out valve 4 is opened, the solenoid valve (not shown) interlocked with the ignition switch is opened, and the liquefied LPG fuel flows through the first communicating pipe 6 by the vapor pressure in the cylinder 3. When the liquefied LPG fuel is discharged under pressure to the vaporizer 9, the liquefied LPG fuel pushes the primary valve 16 open from the inlet passage 15 and flows into the first decompression chamber 11, so that the liquefied LPG fuel is decompressed and becomes a gas. It has become. And vaporized L
When the pressure in the first decompression chamber 11 becomes higher than a predetermined pressure due to the expansion of the PG fuel, the primary diaphragm 1
8 compresses and moves the compression spring 19, the primary diaphragm 18 pulls the primary valve lever 17, the primary valve 16 closes the inlet passage 15,
It is designed to stop the inflow of liquefied LPG fuel.
In this way, the pressure inside the first decompression chamber 12 is always kept at a predetermined pressure.

The second decompression chamber 13 has a lock-off /
A diaphragm 20 and a secondary diaphragm 21 are provided. A compression spring 22 is interposed between the lock-off diaphragm 20 and the partition wall 11. At this time, the lock-off diaphragm 20 and the partition wall 10 form a lock-off chamber 23. A negative pressure from a suction manifold (not shown) acts on the lock-off chamber 23.

Further, a secondary valve 24 is attached to the communication passage 14. A secondary valve lever 25 is attached to the secondary valve 24. At this time, a compression spring 26 is interposed between the secondary valve lever 25 and the partition wall 11.

Further, the outlet passage 27 is provided in the second decompression chamber 13.
And an atmospheric pressure passage 28 are formed. At this time, the outlet passage 27 is connected to the internal combustion engine 7 side of the first communication pipe 6. Further, from the atmospheric pressure passage 28, the second
Atmospheric pressure is applied to the decompression chamber 12.

That is, when the negative pressure generated in the intake manifold (not shown) acts on the lock-off chamber 23, the lock-off diaphragm 20 moves by compressing the compression spring 22, so that the inside of the second decompression chamber 13 is under negative pressure. State,
The secondary diaphragm 21 moves toward the lock-off diaphragm 20 and pushes the secondary valve lever 25 against the compression spring 26. Then, the secondary valve 24 opens the communication passage 14, and the first valve
The liquefied LPG fuel in the decompression chamber 12 flows into the second decompression chamber 13, is completely vaporized, and the secondary diaphragm 21
By the action of the above, the pressure is reduced to almost atmospheric pressure, and the vaporized fuel is supplied from the outlet passage 27 to the fuel supply device 30 described later through the first communication pipe 6.

The first communication pipe 6 is connected to a fuel supply device 30 provided in the internal combustion engine 7. That is, the fuel supply device 30 is the vaporized LPG from the vaporizer 9.
Fuel is supplied to the internal combustion engine 7, and the camper 1 is run by burning the vaporized LPG fuel.

On the other hand, a second communicating pipe 31 as a vaporized fuel supply pipe is connected to the vaporized fuel take-out valve 5 provided in the cylinder 3. At this time, by opening and closing the vaporized fuel extraction valve 5, the second communication pipe 3
It is adapted to regulate the amount of vaporized LPG fuel supplied to the No. 1 unit.

A 3-way valve 32 is connected to the second communication pipe 31. An input port and first and second output ports are formed in the 3-way valve 32, and the second communication pipe 31 is connected to the input port. The first output port has a first branch pipe 31a communicating with the fuel supply device 30, and the second output port has a second branch pipe 31 communicating with various gas devices 33.
b are connected to each other. That is, 3 way valve 3
Reference numeral 2 denotes a fuel supply device 30 or various gas devices 3 for the vaporized LPG fuel accumulated in the upper portion of the cylinder 3 based on the control device C.
3 is supplied to either one. That is, the control device C supplies the LPG fuel vaporized by turning on the 3-way valve 32 when the internal combustion engine 7 is started (hereinafter referred to as “starting”) to the fuel supply device 30 via the first branch pipe 31a. It has become. Further, the control device C turns off the three-way valve 32 in the normal state except when the internal combustion engine 7 is started, so that the second
The vaporized LPG fuel is supplied to the branch pipe 31b. Therefore, the various gas appliances 33 can always be used in the normal state except when the internal combustion engine 7 is started.

In the second branch pipe 31b, various gas appliances 33 are provided.
A gas stove 34 and a shower water heater 35 are connected as shown in FIG. At this time, the gas range 34 and the shower water heater 35 are respectively provided with fuel supply valves 34a and 35a.
Are provided, and these fuel supply valves 34a, 35
By opening and closing a, the amount of LPG supplied to the gas stove 34 and the shower water heater 35 is adjusted.

The shower water heater 35 includes a gas hot water supply unit 3
6 is provided, and the vaporized LPG fuel is supplied by being connected to the second branch pipe 31b. The gas hot water supply unit 36 is provided with a water tank 37 for storing water and a water faucet 38 for connecting a water port (not shown). A shower 39 is connected to the gas hot water supply unit 36. That is, the water tank 3
When the water stored in 7 is introduced into the gas hot water supply unit 36,
The gas hot water supply unit 36 is the LP supplied from the second branch pipe 31b.
By burning G, the cold water is turned into hot water, and the hot water is discharged from the shower 39.

Next, the operation and effect of the camper 1 constructed as described above will be described. First, the case of starting the camper 1 will be described.

As shown in FIGS. 2 and 3, the liquefied LPG fuel in the cylinder 3 is opened in the first communicating pipe 6 after the liquefied fuel take-out valve 4 is opened, and then a solenoid valve (not shown) interlocked with an ignition switch is supplied. To do. Then,
The mixed impurities of the liquefied LPG fuel are filtered by the filter 8, the liquefied LPG fuel is vaporized by the vaporizer 9 under reduced pressure, and the vaporized LPG fuel is supplied to the fuel supply device 30.

Further, the vaporized LPG fuel filled in the cylinder 3 is supplied to the second communicating pipe 31 by opening the vaporized fuel take-out valve 5, and the 3-way valve 32 is provided.
Will be introduced to. At this time, the control device C turns on the three-way valve 32 so that the vaporized LPG fuel accumulated in the upper portion of the cylinder 3 introduced into the second communication pipe 31 is removed from the first branch pipe 3.
The fuel is supplied to the fuel supply device 30 via 1a.

Then, the internal combustion engine 7 starts the camping car 1 by burning the vaporized LPG fuel supplied from the first communication pipe 6 and the first branch pipe 31a to the fuel supply device 30.

After the internal combustion engine 7 is started, the controller C turns off the 3-way valve 32. Then, the vaporized LPG fuel supplied to the first branch pipe 31a is supplied to the second branch pipe 31b. Therefore, the vaporized LPG fuel is supplied to the various gas appliances 33. At this time, by appropriately adjusting the fuel supply valves 34a and 35a, the gas range 34 and the shower 3
Use 9 etc.

Further, when the internal combustion engine 7 is stopped, the controller C controls the 3-way valve 32 to be always off. Therefore, the vaporized LPG fuel accumulated in the upper portion of the cylinder 3 supplied to the second communication pipe 31 is supplied to the various gas devices 33 via the second branch pipe 31b. At this time, the gas range 34, the shower 39, etc. are used by appropriately adjusting the fuel supply valves 34a, 35a.

As described in detail above, according to the above embodiment,
Since the internal combustion engine 7 is driven by using the LPG fuel in the camper 1, the fuel used for the gas equipment 33 and the fuel used for the internal combustion engine 7 can be easily compatible with each other.

Although the cassette cooker using the cassette type LPG cylinder could not be simply cooked, it can be cooked at the same level as when cooking at home as compared with the case of the cassette cooker. .

By supplying LPG fuel from the cylinder 3 and using the shower water heater 35, hot water can be supplied in the same manner as at home. Therefore, the hot water can be used at any time regardless of the driving state of the internal combustion engine 7, and the hot water can be discharged from the shower 39.

Further, piping was provided so that vaporized LPG fuel could be supplied from the fuel cylinder 3 of the internal combustion engine 7 to various gas appliances 33. For this reason, compared with the case of using the fuel cylinder dedicated to the various gas devices 33, it can be advantageous in terms of space and safety.

(Second Embodiment) A second embodiment in which the present invention is embodied in a camper 1 will be described below with reference to FIGS.

As shown in FIGS. 5 and 6, a cylinder chamber 41 is formed on the side of the camper 1. A cylinder 42 in which liquid LPG fuel is stored is stored in the cylinder chamber 41. At this time, the liquefied LPG fuel is stored in the lower portion of the cylinder 42, and the liquefied LPG fuel is vaporized L in the upper portion thereof.
It is filled with PG fuel. The cylinder 42 is provided with a liquefied fuel take-out valve 43 for taking out the liquefied LPG fuel and a liquefied fuel injection valve 44 for injecting the LPG fuel.

At this time, a communication pipe 45 is connected to the liquefied fuel extraction valve 43, and the communication pipe 45 is connected to the internal combustion engine 46. That is, by opening and closing the liquefied fuel extraction valve 43, the amount of liquefied LPG fuel supplied to the communication pipe 45 is adjusted.

The communication pipe 45 is provided with a filter 47 for filtering mixed impurities such as iron rust and dust mixed in the liquefied LPG fuel. Further, in the communication pipe 45, a vaporizer 48 is connected to the internal combustion engine 46 side (downstream side) of the filter 47 via a solenoid valve (not shown).

FIG. 7 shows the basic structure of the vaporizer 48. In the structure of the vaporizer 48, the parts that are basically the same as the structure of the vaporizer 9 in the first embodiment are designated by the same reference numerals, and the description thereof will be omitted. Only the different parts will be described below.

First decompression chamber 12 in vaporizer 48
The inlet passage 15 formed in the cylinder is a communication pipe 45 on the cylinder 42 side.
It is connected to the. The outlet passage 27 formed in the second decompression chamber 13 is connected to the communication pipe 45 on the internal combustion engine 46 side.

At this time, the inlet passage 15 of the first decompression chamber 12
An outflow passage 49 is formed on the wall surface on the side opposite to the wall surface formed with. That is, in the first decompression chamber 12, the liquefied LPG fuel flowing from the inlet passage 15 is vaporized,
In the second depressurizing chamber 13, the vaporized LPG fuel is supplied to the fuel supply device 50 arranged in the internal combustion engine 46 from the outlet passage 27 via the communication pipe 45 after being adjusted to the atmospheric pressure.

Further, the vaporized fuel supply pipe 5 is provided in the outflow passage 49.
1 is connected. That is, a part of the LPG fuel vaporized in the first decompression chamber 12 is supplied to the vaporized fuel supply pipe 51. At this time, the vaporized fuel supply pipe 51 is connected to various gas appliances 52. Since the basic configuration of these various gas appliances 52 is the same as that of the various gas appliances 33 in the first embodiment, the same members are designated by the same reference numerals and the description thereof is omitted.

A branch pipe 51a is branched from the vaporized fuel supply pipe 51 near the internal combustion engine 7. This branch pipe 51
A is connected to a fuel supply device 50 arranged in the internal combustion engine 46 via a control valve 53. That is, this control valve 5
3 is opened / closed based on the control device C to adjust the amount of vaporized LPG fuel supplied to the fuel supply device 50.

The fuel supply device 50 is the vaporized LP.
The G-fuel is supplied to the internal combustion engine 46, and the internal combustion engine 46 burns the vaporized LPG fuel to drive the camper van 1.

Next, the operation and effect of the camper 1 constructed as described above will be described. First, the case of starting the camper 1 will be described.

As shown in FIGS. 5 and 6, the liquefied LPG fuel in the cylinder 42 is supplied into the communication pipe 45 by opening a solenoid valve (not shown). Then liquefied LPG
The mixed impurities of the fuel are filtered by the filter 47 and flow into the vaporizer 48. At this time, the liquefied LPG fuel in the first decompression chamber 12 is vaporized. Then, the vaporized LPG fuel flows into the second pressure reducing chamber 13 via the communication passage 14, is adjusted to the atmospheric pressure, and is supplied from the outlet passage 27 to the fuel supply device 50 via the communication passage 14.

Further, the LP vaporized in the first decompression chamber 12
The G fuel is supplied from the outflow passage 49 to the vaporized fuel supply pipe 51. Then, the vaporized LPG fuel is supplied to the branch pipe 51a.
Is supplied to. At this time, the control device C opens the control valve 53 and causes the fuel supply device 50 to vaporize LP from the branch pipe 51a.
G fuel is supplied. Then, the fuel supply device 50 supplies the vaporized LPG fuel to the internal combustion engine 46,
The camper 1 is started by burning the vaporized LPG fuel.

At this time, the vaporized LPG fuel supplied to the vaporized fuel supply pipe 51 is supplied to the fuel supply device 50 and also to the various gas appliances 52. Therefore, even when the internal combustion engine 46 is started, for example, by appropriately adjusting the fuel supply valves 34a and 35a,
The gas range 34, the shower 39, etc. are used.

After the internal combustion engine 46 is started, the control device C closes the control valve 53 of the internal combustion engine 46. Then, the vaporized LPG fuel supplied to the vaporized fuel supply pipe 51 is supplied only to the various gas devices 52. At this time, the gas range 34, the shower 39, and the like are used by appropriately adjusting the fuel supply valves 34a and 35a, for example.

Further, even if the internal combustion engine 46 is stopped from this state, the vaporized LPG fuel is supplied to the vaporized fuel supply pipe 51 while the vaporizer 48 is driven. Therefore, the gas range 34, the shower 39, and the like are used by appropriately adjusting the fuel supply valves 34a and 35a.

As described above in detail, according to the second embodiment,
In addition to the effects of the first embodiment, the liquid LPG fuel is vaporized by the vaporizer 48, and the vaporized LPG fuel is supplied to the various gas devices 52. Therefore, since the LPG fuel vaporized by the vaporizer 48 is supplied to the various gas devices 52, the ratio of various gas components in the LPG fuel in the cylinder 42 is not changed. Therefore, the output of the engine can be kept stable even if a large-capacity gas appliance is used.

Further, even when the internal combustion engine 46 is started, the vaporized LPG fuel is supplied to the various gas devices 52 through the vaporized fuel supply pipe 51, so that, for example, the fuel supply valves 34a and 35a are appropriately set. The gas range 34, the shower 39, etc. can be used by adjusting to this.

The present invention is not limited to the above-mentioned embodiments, and a part of the configuration can be appropriately modified and carried out as follows without departing from the gist of the invention. (1) In the above embodiment, LPG fuel was used as the liquefied gas, but LNG fuel may be used.

(2) In the above embodiment, the present invention is applied to the camping car 1, but it may be applied to a liquefied gas vehicle equipped with various gas appliances such as a food stall. (3) In the above embodiment, the various gas appliances 33 and 52 can be used even when the camper van 1 is running.

(4) In the first embodiment, even when the internal combustion engine 7 is started, the control device C controls the 3-way valve 32 to be in the OFF state, and the LPG fuel vaporized to the second branch pipe 31b side is removed. By supplying, various gas appliances 33 may be made usable.

(5) In the first embodiment, the vaporized LPG fuel filled in the cylinder 3 is supplied to the fuel supply device 30 or various gas appliances 33 using the 3-way valve 32. This may be configured such that a pipe that directly supplies the vaporized LPG fuel filled in the cylinder 3 to the fuel supply device 30 and a pipe that directly supplies the various gas devices 33 are connected to the cylinder 3.

(6) In the first embodiment, the 3-way valve 3
2 is used to vaporize the vaporized LPG fuel into the first branch pipe 31a.
And the second branch pipe 31b. A control valve is provided for each of the first branch pipe 31a and the second branch pipe 31b.
By controlling those control valves, the first branch pipe 31
The amount of vaporized LPG fuel supplied to the a and the second branch pipe 31b may be adjusted.

(7) In the second embodiment, the outflow passage 49
A 3-way valve may be attached to a branch portion of the vaporized fuel supply pipe 51 connected to the branch pipe 51a. At this time, the control valve 53 may not be attached.

[0065]

As described above in detail, according to the present invention, the fuel of the internal combustion engine is liquefied gas, and the liquefied gas is supplied from the cylinder storing the liquefied gas to the gas equipment, so that the normal life such as home There is an excellent effect that gas equipment can be handled in the same way as when handling gas equipment.

[Brief description of drawings]

FIG. 1 is a side view showing a camper 1 in first and second embodiments of the present invention.

FIG. 2 is an explanatory view showing a piping state of piping from a cylinder to an internal combustion engine and various gas appliances in the first embodiment.

FIG. 3 is an explanatory diagram showing the configuration of a pipe connected to an internal combustion engine, various gas appliances and the like from a cylinder in the first embodiment.

FIG. 4 is a cross-sectional view showing a vaporizer in the first embodiment.

FIG. 5 is an explanatory view showing a piping state of piping from a cylinder to an internal combustion engine and various gas appliances in a second embodiment.

FIG. 6 is an explanatory diagram showing the configuration of a pipe from a cylinder to an internal combustion engine, various gas appliances and the like in the second embodiment.

FIG. 7 is a cross-sectional view showing a vaporizer in a second embodiment.

FIG. 8 is an explanatory diagram showing configurations of an internal combustion engine and various gas appliances in a conventional example.

[Explanation of symbols]

3, 42 ... Cylinder, 6 ... First communication pipe as a communication pipe,
7, 46 ... Internal combustion engine as drive source, 31 ... Second communication pipe as vaporized fuel supply pipe, 33, 52 ... Gas equipment, 4
5 ... Communication pipe, 51 ... Vaporized fuel supply pipe.

Claims (2)

[Claims] 1. A liquefied gas vehicle in which liquefied gas stored in a cylinder is supplied to an internal combustion engine, the liquefied gas vehicle including a gas device, the liquefied gas being supplied from the cylinder to the gas device. 2. A liquefied gas vehicle in which a communication pipe for supplying the liquefied gas is connected to a cylinder storing the liquefied gas, and the communication pipe is connected to an internal combustion engine via a vaporizer, in the cylinder. A gas device equipped in a liquefied gas vehicle in which the cylinder or the carburetor is provided with a vaporized fuel supply pipe for supplying the liquefied gas vaporized or vaporized by the vaporizer to the gas device.