| 摘要 |
<p>A natural gas vehicle fuel delivery system regulates the pressure of LNG which is vaporized and delivered to an engine. The system employs dual regulator valves (34/31 and 32/33) responsive to the gas phase pressure of the storage tank (10A/10B) to either directly couple vapor produced from a heat exchanger (61/63) to an engine combustion system, or to divert that vapor through another heat (62A/62B) contained within the tank (10A/10B) itself. This additional heat exchanger (62A/62B) maintains the pressure within the tank (10A/10B) at the desired level despite heavy fuel demands of the engine. The system functions independent of liquid level in the storage tank (10A/10B). When multiple LNG storage tanks (10A, 10B) are used, they are coupled in parallel so that they both produce gas and are concurrently regulated in the gas phase portion. A pressure initializing structure and process are also provided.</p> |
