Fuel supply system, fuel consumption source system, and fuel supply method
Patent Information
- Authority / Receiving Office
- JP Β· JP
- Patent Type
- Applications
- Current Assignee / Owner
- KAWASAKI MOTORS LTD
- Filing Date
- 2024-12-04
- Publication Date
- 2026-06-16
Smart Images
Figure 2026097115000001_ABST
Abstract
Claims
1. A fuel tank for storing liquid fuel, A vaporizer that vaporizes the aforementioned liquid fuel into a fuel gas, A pre-vaporization passage connecting the fuel tank and the vaporizer, A post-vaporization flow path connecting the vaporizer and the fuel consumption source, A return passage connecting the vaporization passage and the fuel tank, The system includes a compressor interposed in the return passage for compressing the fuel gas flowing through the post-vaporization passage and filling the fuel tank with the compressed fuel gas. Fuel supply system.
2. The vaporization passage is further provided with a control valve interposed therein to reduce the pressure of the fuel gas vaporized by the vaporizer to a pressure suitable for supply to the fuel consumption source, The return passage is connected to the post-vaporization passage downstream of the control valve. The fuel supply system according to claim 1.
3. The fuel tank includes a low-pressure fuel tank and a high-pressure fuel tank. The aforementioned pre-vaporization channel is An upstream pre-vaporization passage connecting the low-pressure fuel tank and the high-pressure fuel tank, It includes a downstream pre-vaporization passage connecting the high-pressure fuel tank and the vaporizer, The return passage connects the post-vaporization passage and the high-pressure fuel tank. The fuel supply system further comprises a first check valve interposed in the upstream pre-vaporization passage to prevent backflow from the high-pressure fuel tank to the low-pressure fuel tank. The fuel supply system according to claim 1 or 2.
4. The low-pressure fuel tank has a larger capacity than the high-pressure fuel tank. The fuel supply system according to claim 3.
5. The low-pressure fuel tank houses the high-pressure fuel tank. The fuel supply system according to claim 4.
6. The low-pressure fuel tank is further provided with a gas filling channel that supplies filling gas at a pressure lower than the pressure of the fuel gas supplied to the high-pressure fuel tank. The fuel supply system according to claim 4.
7. The gas filling passage connects the post-vaporization passage and the low-pressure fuel tank. The fuel supply system further includes a filling pressure reducing valve interposed in the gas filling passage, which reduces the pressure of the fuel gas sent to the high-pressure fuel tank to a pressure lower than the pressure of the fuel gas but higher than atmospheric pressure. The fuel supply system according to claim 6.
8. The downstream pre-vaporization passage is further provided with a second check valve interposed therein to prevent backflow from the vaporizer toward the high-pressure fuel tank. The fuel supply system according to claim 3.
9. Multiple high-pressure fuel tanks are provided. The fuel supply system further includes a gas filling switching valve interposed in the return passage that switches the high-pressure side fuel tank to which the fuel gas compressed by the compressor should be sent. The fuel supply system according to claim 3.
10. Multiple high-pressure fuel tanks are provided. The fuel supply system is A discharge channel for discharging gas from the plurality of high-pressure fuel tanks, The system further includes a gas discharge valve interposed in the discharge channel, which switches the high-pressure fuel tank from which the built-in gas should be discharged. The fuel supply system according to claim 3.
11. A fuel consumption source that is powered by being supplied with fuel gas, The fuel gas is liquefied and stored in a low-pressure fuel tank and a high-pressure fuel tank, A vaporizer that vaporizes the liquid fuel into the fuel gas, An upstream pre-vaporization passage connecting the low-pressure fuel tank and the high-pressure fuel tank, A downstream pre-vaporization passage connecting the high-pressure fuel tank and the vaporizer, A post-vaporization flow path connecting the vaporizer and the fuel consumption source, A return passage connecting the post-vaporization passage, the high-pressure fuel tank, and the low-pressure fuel tank, The system includes a pressure control valve that raises the pressure of the high-pressure fuel tank to be higher than the pressure of the low-pressure fuel tank, The high-pressure fuel tank is configured to have a smaller capacity than the low-pressure fuel tank. Fuel consumption source system.
12. To supply liquid fuel to multiple high-pressure fuel tanks, The first high-pressure fuel tank among the plurality of high-pressure fuel tanks is filled with compressed gas by a compressor, and vaporized fuel is supplied from the first high-pressure fuel tank to the fuel consumption source via a vaporizer, To determine whether the amount of liquid fuel stored in the first high-pressure fuel tank is below a threshold, When the amount of liquid fuel stored in the first high-pressure fuel tank is below the threshold, the second high-pressure fuel tank among the plurality of high-pressure fuel tanks is filled with gas compressed by the compressor, and vaporized fuel is supplied from the second high-pressure fuel tank to the fuel consumption source via the vaporizer. The system includes, when the amount of liquid fuel stored in the first high-pressure fuel tank is below the threshold, opening the gas discharge passage of the first high-pressure fuel tank to discharge the gas contained within and supplying liquid fuel to the first high-pressure fuel tank. Fuel supply method.