Engineer Solution of SI Tank

LNG is stored in the tank. The saturation pressure drives LNG to flow to the vaporizer where the coolant from engine heats LNG into gaseous manner. When NG of gaseous manner leaves the vaporizer, its temperature can reach to 40℃. After solenoid valve opens, gaseous NG flows into the pressure regulator which guarantees the input pressure is below the requirement of engine pressure. The monitor can present the index of tank pressure, temperature and liquid level. It helps the driver to monitor the operation.

Engineer Solution for HPDI Tank

LNG fuel for the Westport GX engine is stored in the LNG tank, and drawn out with a unique LNG pump (powered by hydraulic oil from an engine-driven hydraulic pump). The LNG is vaporized—using excess heat from the engine coolant—and exits the tank module at approximately 100 ºF and 4,500 psi (40 ºC and 30 MPa). The warm, high-pressure gas is filtered and passed through an accumulator vessel that dampens pressure fluctuations and provides natural gas for engine start-up.

At the same time, a diesel fuel pump draws and pressurizes diesel fuel from the pilot diesel tank. Both the diesel and natural gas are sent to the fuel conditioning module, where they are pressure regulated, filtered, and distributed to the fuel injectors via fuel rails. The Westport GX engine is electronically managed by the control units, allowing continuous adjustments that provide optimal and unparalleled engine efficiency.