Compressed Natural Gas Fuel Mass Control System

摘要

A system, related method and computer program product are disclosed for controlling fuel mass of CNG received by an engine. The system may comprise a heat exchanger configured to receive CLNG and supply coolant and to output CNG and return coolant, an injector configured to inject CNG into the engine, a gas line between the injector and heat exchanger, a control valve configured to receive return coolant from the heat exchanger and to change the amount of return coolant flowing through control valve, and a controller connected to the control valve. The gas line may be configured to carry CNG from the heat exchanger to the injector. The controller may be configured to maintain a Gas Line Temperature within an operating range by adjusting the amount of return coolant flowing through the control valve based, at least in part, on the Gas Line Temperature and a Target Return Coolant Temperature.

主权项

1. A method for controlling the fuel mass of CNG received by an engine, the method comprising:
receiving a Gas Line Temperature for CNG disposed in a gas line, the gas line disposed between a heat exchanger and the engine, the heat exchanger configured to receive CLNG and supply coolant and to output the CNG into the gas line and to output return coolant; and maintaining, by a controller operably connected to a control valve, the Gas Line Temperature within an operating range by adjusting the amount of return coolant allowed to flow through the control valve based at least in part on the Gas Line Temperature and a Target Return Coolant Temperature, wherein the control valve is configured to receive return coolant from the heat exchanger.