One of the processes needed for the conversion of a diesel engine so that it can use natural gas as fuel is the reduction of the compression ratio, since the one that the diesel engine originally has is greater than the one needed for the optimal operation with natural gas.

The proposed process consists of adding cold material to the cylinder head or engine head through metallization or electric arc or plasma spraying to form a combustion chamber therein.

Various methods and systems are provided for energy management at a consist. In one example, a method for the energy management includes coordinating a distribution of a power demand in response to a power output of each of a fuel cell system, a battery system, and an engine system. The power output of each of the fuel cell system, the battery system, and the engine system may be selected based on a respective efficiency of each system.

Various methods and systems are provided for energy management at a consist. In one example, a method for the energy management includes coordinating a distribution of a power demand in response to a power output of each of a fuel cell system, a battery system, and an engine system. The power output of each of the fuel cell system, the battery system, and the engine system may be selected based on a respective efficiency of each system.

A compression ignition engine provides a main injector and a second pilot injector producing a spray passing over an igniter producing a pilot flame assisting in ignition of the main injector spray.

A compression ignition engine provides a main injector and a second pilot injector producing a spray passing over an igniter producing a pilot flame assisting in ignition of the main injector spray.

A method for preventing a piston oil-up, may include determining an oil-up condition formation to use a controller, wherein an oil-up oil generates since an engine oil moves upward above a piston, after an engine operation state is verified; determining a suction condition of the oil-up oil to use the controller based on any of a cylinder total control suction method, a cylinder explosion sequence suction method and a cylinder identical stroke sequence suction method when the oil-up condition has been formed; and operating an oil pump to use the controller, sucking the oil-up oil to use a suction force of the oil pump and discharging the sucked oil-up oil from a cylinder block.

A thermal choke, includes (1) a body, comprising a heat conductive material, (2) an electric heater, on or in the body, (3) a temperature sensor, on or in the body, and (4) a fin, in a channel surrounded by the body. The thermal choke is configured to fit between a throttle assembly and a cylinder of a spark ignition engine.

Various methods and systems are provided for energy management at a consist. In one example, a method for the energy management includes coordinating a distribution of a power demand in response to a power output of each of a fuel cell system, a battery system, and an engine system. The power output of each of the fuel cell system, the battery system, and the engine system may be selected based on a respective efficiency of each system.

Various methods and systems are provided for energy management at a consist. In one example, a method for the energy management includes coordinating a distribution of a power demand in response to a power output of each of a fuel cell system, a battery system, and an engine system. The power output of each of the fuel cell system, the battery system, and the engine system may be selected based on a respective efficiency of each system.

This invention provides a process for improving the sustainability of a dual-fuel engine system operated with a first liquid fuel and a second gaseous fuel, said process comprising providing to the engine system an EN15940 compliant paraffinic gasoil as the first liquid fuel and a gaseous fuel selected from ammonia, methanol, hydrogen and methane based gas as the second gaseous fuel, and combusting said fuels in an internal combustion engine system, wherein exhaust gases from combusting said fuels are contacted with a methane oxidation catalyst provided in the exhaust system of said internal combustion engine system.