JP-7855499-B2 - Fuel supply system and vehicle

Inventors

• 増子 京佑
• 大谷 元希
• 洞江 幸宏
• 中川 周
• 塚本 将太
• 田中 基暉
• 大見 正宣
• 清水 啓行

Assignees

• 愛三工業株式会社

Dates

Publication Date

20260508

Application Date

20221130

Claims (5)

1. A fuel supply device that supplies fuel to an internal combustion engine that uses hydrogen gas or liquid ammonia as fuel, The vehicle is equipped with a fuel tank for storing the hydrogen gas and the liquid ammonia , The fuel tank comprises a first discharge port which is the discharge port for hydrogen gas and a second discharge port which is the discharge port for liquid ammonia . The first discharge port and the second discharge port are connected to the internal combustion engine. A fuel supply system in which a fuel pump is not provided in the flow path of the liquid ammonia that flows from the second discharge port to the internal combustion engine .
2. A fuel supply device according to claim 1, A fuel supply device in which the ratio of hydrogen gas and liquid ammonia stored in the fuel tank can be changed according to the ambient temperature.
3. A vehicle comprising an internal combustion engine that uses hydrogen gas or liquid ammonia as fuel, and a fuel tank for storing the hydrogen gas and the liquid ammonia, The fuel tank comprises a first discharge port which is the discharge port for hydrogen gas and a second discharge port which is the discharge port for liquid ammonia. The first discharge port and the second discharge port are connected to the internal combustion engine. A vehicle in which a fuel pump is not provided in the flow path of the liquid ammonia that flows from the second discharge port to the internal combustion engine .
4. The vehicle according to claim 3, A vehicle in which, when the fuel tank is mounted on the vehicle, the first outlet of the fuel tank is located above the second outlet.
5. A vehicle according to claim 3 or 4, The fuel tank is configured to be detachable from the vehicle.

Description

The technology disclosed herein relates to a fuel tank and a vehicle equipped therewith. Patent Document 1 discloses an engine that uses liquid ammonia as fuel. In Patent Document 1, liquid ammonia stored in a fuel tank is supplied to a cylinder and burned to generate combustion gas, which is then used as the engine's power source. Japanese Patent Publication No. 2015-135067 A schematic diagram showing the configuration of a fuel tank and internal combustion engine according to an embodiment. The fuel tank 2 of this embodiment will be described below with reference to the drawings. The fuel tank 2 is mounted together with the internal combustion engine 3, for example, in a vehicle 10. As shown in Figure 1, both hydrogen gas 4 and liquid ammonia 5 are stored inside the fuel tank 2. The fuel tank 2 shown in Figure 1 corresponds to the orientation when it is actually mounted and used in a vehicle 10. That is, the vertical direction of the fuel tank 2 in Figure 1 corresponds to the vertical direction. Hydrogen gas 4 has a lower specific gravity than liquid ammonia 5. Therefore, as shown in Figure 1, liquid ammonia 5 occupies the lower space of the fuel tank 2, and hydrogen gas 4 occupies the upper space of the fuel tank 2. The fuel tank 2 has a first discharge port 8 and a second discharge port 9. The first discharge port 8 is located on the upper surface 2a of the fuel tank 2. The second discharge port 9 is located on the lower part of the side surface 2b of the fuel tank 2. Within the internal space of the fuel tank 2, the area in contact with the first discharge port 8 is filled with hydrogen gas 4, and the area in contact with the second discharge port 9 is filled with liquid ammonia 5. That is, the fuel tank 2 is configured so that hydrogen gas 4 is discharged to the outside from the first discharge port 8, and liquid ammonia 5 is discharged to the outside from the second discharge port 9. The positions of the first discharge port 8 and the second discharge port 9 may be appropriately adjusted according to the ratio (volume) of hydrogen gas 4 and liquid ammonia 5 stored inside the fuel tank 2. Furthermore, the fuel tank 2 is configured to be detachable from the vehicle 10. Therefore, for example, it is possible to fill the fuel tank 2 with hydrogen gas 4 or liquid ammonia 5 while it is removed, or to replace the fuel tank 2 with a spare fuel tank 2. The internal combustion engine 3 comprises a cylinder 11 having a combustion chamber 11a inside, a hydrogen gas supply device 12 that supplies hydrogen gas 4 into the combustion chamber 11a, an ammonia supply device 13 that supplies liquid ammonia 5 into the combustion chamber 11a, an intake device 14 that supplies air into the combustion chamber 11a, an ignition device 15 that generates a spark in the combustion chamber 11a, and an exhaust device 16 that discharges exhaust gas after combustion from the combustion chamber 11a. The cylinder 11 comprises a cylindrical cylinder liner 11b, a cylinder head 11c covering the upper opening of the cylinder liner 11b, a piston 11d reciprocating within the cylinder liner 11b, and a crank 11e connected to the piston 11d. The space enclosed by the cylinder liner 11b, cylinder head 11c, and piston 11d is the combustion chamber 11a. Therefore, the combustion chamber 11a is compressed to a high-pressure state when the piston 11d moves upward in the figure. Furthermore, burning hydrogen gas 4 or liquid ammonia 5 in this combustion chamber 11a causes the piston 11d to reciprocate, transmitting the driving force to rotate the crank 11e. The intake system 14 comprises an intake pipe 14a, one end of which is fixed to the cylinder head 11c, and an intake valve 14b provided within the intake pipe 14a. The intake valve 14b is configured to be opened and closed by a drive mechanism (not shown). Opening the intake valve 14b connects the intake pipe 14a to the combustion chamber 11a, supplying air from the intake pipe 14a to the combustion chamber 11a. The exhaust system 16 comprises an exhaust pipe 16a, one end of which is fixed to the cylinder head 11c, and an exhaust valve 16b provided within the exhaust pipe 16a. The exhaust valve 16b is configured to be opened and closed by a drive mechanism (not shown). Opening the exhaust valve 16b connects the inside of the exhaust valve 16b to the combustion chamber 11a, and the exhaust gas after combustion in the combustion chamber 11a is discharged through the exhaust valve 16b. The ignition device 15 consists of, for example, a spark plug and is fixed in the cylinder head 11c at approximately the center, with its tip positioned inside the combustion chamber 11a. The tip of the ignition device 15 is provided with an ignition unit 15a that generates a spark in the upper central part of the combustion chamber 11a. The hydrogen gas supply device 12 is, for example, an injector and is connected to the first discharge port 8 of the fuel tank 2. The hydrogen gas supply device 12 is fixed to the cyli