System and method for controlling a flow of vent gases to a natural gas engine
AssigneeRem Technology Inc.
InventorHoward Malm
Life of this patent
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Abstract
A system and method controls a flow of vent gases to a combustion engine. The system includes an inlet for receiving the vent gases, a pressure relief device that enables the vent gases to escape to atmosphere when a pressure in the inlet exceeds a predetermined relief pressure, a flow-restricting orifice, and a back pressure regulator disposed downstream of the orifice. A shut-off valve disposed between the back pressure regulator and the air intake is set to only open when an intake pressure falls below a predetermined negative intake pressure.
Claims24
A system for controlling a flow of vent gases to a combustion engine, the system comprising:
- an inlet for receiving the vent gases;
- a pressure relief device that enables the vent gases to escape to atmosphere when a pressure in the inlet exceeds a predetermined relief pressure;
- a flow-restricting orifice;
- a back pressure regulator disposed downstream of the orifice for regulating a maximum pressure in a duct between the orifice and the back pressure regulator;
- and
- a shut-off valve disposed between the back pressure and an air intake duct of the engine, the valve being set to only open when an intake duct pressure falls below a predetermined pressure.
A method for controlling a flow of vent gases to a combustion engine, the method comprising:
- receiving vent gases into an inlet;
- releasing the vent gases to atmosphere via a pressure relief device when a vent gas pressure in the inlet exceeds a predetermined relief pressure;
- flowing the vent gases through a flow-restricting orifice;
- flowing the vent gases through a back pressure regulator when the vent gas pressure exceeds a back pressure regulator setting a back pressure regulator;
- and
- opening a shut-off valve between the back pressure regulator and an air intake duct of the engine to enable the vent gases to flow into the air intake duct of the engine if an intake duct pressure is below a predetermined pressure.
Dependencies are inferred from the claim text.