Abstract: A fuel system for a machine may include a fuel tank configured to hold cryogenic fuel, a pressure sensor, and an electronic control module (ECM). The ECM may determine a change in pressure of the fuel between a first time and a second time, determine a predicted change in pressure of the fuel between the first time and the second time, and determine that the change in pressure and the predicted change in pressure is greater than a threshold. Based on the change in pressure and the predicted change in pressure being greater than the threshold, a notification may be displayed associated with an integrity of the fuel tank.

Abstract: A fuel level measurement system and method for liquified natural gas (LNG) powered machines is disclosed. An engine control module (ECM) receives fuel line pressure levels at a first time (e.g., a key-off event) and, again, at a second time (e.g., a key-on event). The ECM predicts an expected change in pressure from the key-off event to the key-on event based on various factors. If the change in pressure detected is greater than a threshold level different from the predicted change in pressure, the ECM determines a fill event and resets a current fuel level. The ECM tracks mass flow commands used to provide fuel to the engine to determine the consumption of fuel from the fuel tank and to determine a new current fuel level based on the amount of fuel consumed. The current fuel level is displayed on a fuel gauge.

Abstract: A fuel system for a machine may include a fuel tank configured to hold cryogenic fuel, a pressure sensor, and an electronic control module (ECM). The ECM may determine a change in pressure of the fuel between a first time and a second time, determine a predicted change in pressure of the fuel between the first time and the second time, and determine that the change in pressure and the predicted change in pressure is greater than a threshold. Based on the change in pressure and the predicted change in pressure being greater than the threshold, a notification may be displayed associated with an integrity of the fuel tank.

Abstract: A fuel level measurement system and method for liquified natural gas (LNG) powered machines is disclosed. An engine control module (ECM) receives fuel line pressure levels at a first time (e.g., a key-off event) and, again, at a second time (e.g., a key-on event). The ECM predicts an expected change in pressure from the key-off event to the key-on event based on various factors. If the change in pressure detected is greater than a threshold level different from the predicted change in pressure, the ECM determines a fill event and resets a current fuel level. The ECM tracks mass flow commands used to provide fuel to the engine to determine the consumption of fuel from the fuel tank and to determine a new current fuel level based on the amount of fuel consumed. The current fuel level is displayed on a fuel gauge.

Abstract: A fuel delivery system for an engine is provided. The fuel delivery system includes a tank, a temperature sensor, a delivery conduit, a return conduit, a heat exchanger, a first valve, a second valve, an accumulator, and a controller. The controller is configured to receive a signal indicative of a temperature of a fuel present within the tank. The controller is also configured to control at least one of the first valve and the second valve to selectively bypass at least a portion of the fuel to the tank through the return conduit and the accumulator based, at least in part, on the received signal. The portion of the fuel is adapted to raise the temperature of the fuel present within the tank.

Abstract: A fuel delivery system for an engine is provided. The fuel delivery system includes a tank, a temperature sensor, a delivery conduit, a heat exchanger, a control valve, a check valve, a bypass conduit, a bypass valve, and a controller. The controller is configured to receive a signal indicative of a temperature of a fuel present within the tank. The controller is also configured to control the control valve to selectively reverse at least a portion of the fuel in a gaseous state from the heat exchanger to the tank through the bypass conduit based, at least in part, on the received signal. The portion of the fuel is adapted to raise the temperature of the fuel present within the tank.

Abstract: A fuel delivery system for an engine is provided. The fuel delivery system includes a tank, a temperature sensor, a delivery conduit, a return conduit, a heat exchanger, a first valve, a second valve, an accumulator, and a controller. The controller is configured to receive a signal indicative of a temperature of a fuel present within the tank. The controller is also configured to control at least one of the first valve and the second valve to selectively bypass at least a portion of the fuel to the tank through the return conduit and the accumulator based, at least in part, on the received signal. The portion of the fuel is adapted to raise the temperature of the fuel present within the tank.

Abstract: A fuel delivery system for an engine is provided. The fuel delivery system includes a tank, a temperature sensor, a pressure sensor, a delivery conduit, a return conduit, a heat exchanger, a first valve, a second valve, and a controller. The controller is configured to receive a signal indicative of a temperature of a fuel present within the tank. The controller is also configured to receive a signal indicative of a pressure of the fuel downstream of the heat exchanger. The controller is further configured to control at least one of the first valve and the second valve to selectively bypass at least a portion of the fuel in a gaseous state to the tank through the return conduit based, at least in part, on the received signals. The portion of the fuel is adapted to raise the temperature of the fuel present within the tank.