Patent ID: 9482195
Filing Date: 2016-11-01
CPC Classification: F02M,Y02T

Claim Text:
1. A system comprising: a storage tank constructed and arranged to store a liquid fuel therein, wherein the fuel is a gas at standard room temperature and pressure; a combustion engine having a plurality of combustion chambers, a liquid injection fuel rail connected to the combustion engine, and a plurality of liquid fuel injectors coupled to the liquid injection fuel rail; a liquid fuel feed line constructed and arranged to have a portion thereof extending into the storage tank a distance sufficient to be submerged in the liquid fuel when the liquid fuel is carried in the storage tank and connected to the liquid injection fuel rail to deliver the liquid fuel thereto; a liquid fuel return line connected to the liquid injection fuel rail and the storage tank to recirculate the liquid fuel from the liquid injection fuel rail back into the storage tank; a gaseous line connected to the storage tank to remove the gas from the storage tank and a throttling valve connected to the gaseous line, wherein the gaseous line and the throttling valve are constructed and arranged to expand the gas flowing through the gaseous line to reduce the temperature of the gas and to provide a cooled gas stream; wherein the gaseous line is connected to a heat exchanger, and at least one of the liquid fuel feed line or liquid fuel return line is connected to the heat exchanger so that heat is exchanged between the liquid fuel in the liquid fuel feed line or liquid fuel return line and the cooled gas stream wherein the throttling valve is directly upstream of the heat exchanger to provide the cooled gas stream entering the heat exchanger.