Methods and systems for distributing engine output among vehicles of a consist are disclosed. One example system comprises a controller including non-transitory media having instructions stored on the media and executed by the controller for adjusting distribution of engine output between at least a first engine and a second engine in response to a regeneration mode, wherein the regeneration mode regenerates an exhaust gas recirculation (EGR) cooler that is coupled to the first engine.

Methods and systems for distributing engine output among vehicles of a consist are disclosed. One example system comprises a controller including non-transitory media having instructions stored on the media and executed by the controller for adjusting distribution of engine output between at least a first engine and a second engine in response to a regeneration mode, wherein the regeneration mode regenerates an exhaust gas recirculation (EGR) cooler that is coupled to the first engine.

A system for cooling at least one electrical component of a machine. The machine is powered by a liquefied natural gas (LNG). The system includes at least one blower and at least one heat exchanger. The at least one blower is arranged to direct an air flow towards the at least one electrical component. The at least one heat exchanger is arranged upstream of the at least one electrical component. The at least one heat exchanger is using LNG as the coolant for cooling the air flow being directed towards the at least one electrical component.

A system for cooling at least one electrical component of a machine. The machine is powered by a liquefied natural gas (LNG). The system includes at least one blower and at least one heat exchanger. The at least one blower is arranged to direct an air flow towards the at least one electrical component. The at least one heat exchanger is arranged upstream of the at least one electrical component. The at least one heat exchanger is using LNG as the coolant for cooling the air flow being directed towards the at least one electrical component.

A vehicle may include: a genset including: an engine configured to combust light fuel such as natural gas, a generator linked to the engine and configured to convert mechanical energy provided by the engine into electrical energy; one or more light fuel storage containers; one or more electrical storage devices such as batteries; a plurality of wheels; a plurality of electric motors configured to drive the plurality of wheels; a first power bus configured to electrically connect the generator of the genset, the one or more electrical storage devices, and the plurality of electric motors. Each of the one or more electrical storage devices may be disposed lower than each of the one or more light fuel storage containers with respect to a vertically extending reference axis that is perpendicular to a reference plane parallel to ground.

A vehicle may include: a genset including: an engine configured to combust light fuel such as natural gas, a generator linked to the engine and configured to convert mechanical energy provided by the engine into electrical energy; one or more light fuel storage containers; one or more electrical storage devices such as batteries; a plurality of wheels; a plurality of electric motors configured to drive the plurality of wheels; a first power bus configured to electrically connect the generator of the genset, the one or more electrical storage devices, and the plurality of electric motors. Each of the one or more electrical storage devices may be disposed lower than each of the one or more light fuel storage containers with respect to a vertically extending reference axis that is perpendicular to a reference plane parallel to ground.

Methods and systems are provided for controlling fueling and mitigating knock in internal combustion engines, such as multi-fuel engines. In one example, a method may include monitoring a frequency of knock events corresponding to one or more engine cylinders, and dynamically increasing a substitution ratio while the frequency of knock events is less than a maximum action threshold. In some examples, the method may further include actively adjusting one or more engine operating conditions to decrease the substitution ratio responsive to a severity of knocking in the one or more engine cylinders being greater than or equal to a threshold severity.

Methods and systems are provided for controlling fueling and mitigating knock in internal combustion engines, such as multi-fuel engines. In one example, a method may include monitoring a frequency of knock events corresponding to one or more engine cylinders, and dynamically increasing a substitution ratio while the frequency of knock events is less than a maximum action threshold. In some examples, the method may further include actively adjusting one or more engine operating conditions to decrease the substitution ratio responsive to a severity of knocking in the one or more engine cylinders being greater than or equal to a threshold severity.

A method that includes coupling an external, removable fuel pressurization system to a fuel system of a vehicle while the vehicle remains in a confined space. The fuel system of the vehicle is pressurized with the fuel pressurization system while the vehicle remains in the confined space and without activating an engine of the vehicle. Decay of pressure of the fuel system is monitored following pressurization of the fuel system, and one or more of a leak, or a replaceable component, of the fuel system of the vehicle is detected based on at least in part on the decay of pressure that are monitored.

A locomotive is provided including a main deck extending along a longitudinal axis and supporting one or more prime movers configured to be powered at least partially by gaseous fuel; a first truck and a second truck axially spaced apart in the direction of the longitudinal axis, the first and second trucks supporting the main deck; and at least one fuel compartment integrated into the main deck along the longitudinal axis, the at least one fuel compartment comprising one or more supports configured to support loads from the main deck, and one or more storage wells adapted to store one or more storage tanks for storing the gaseous fuel.