A movable electrical generation system includes a generator operable to produce a supply of electrical energy, a prime mover operable to drive the generator, a first fuel, a second fuel different from the first fuel, and a fuel selector valve assembly operable to selectively deliver the first fuel and the second fuel to the prime mover, wherein in response to a transition from delivery of the first fuel to the prime mover to delivery of the second fuel to the prime mover, both the first and second fuels are delivered to the prime mover before cessation of delivery of the first fuel.

A fuel supply valve for a slurry fuel injector valve, the fuel supply valve comprising: a fuel inlet for fluid communication with a slurry fuel reservoir; a fuel outlet for fluid communication with a nozzle of the fuel injector valve; a pump chamber port for fluid communication with a pump chamber of the fuel injector valve; and a valve gate moveable between a first position, at which the fuel inlet is in fluid communication along a first slurry fuel flow path with the pump chamber port, and a second position, at which the fuel outlet is in fluid communication along a second slurry fuel flow path with the pump chamber port; wherein the valve gate is operable with a valve actuation liquid from an engine.

Disclosed is a slurry fuel injector valve, comprising: a fuel outlet valve through which slurry fuel is able to exit the slurry fuel injector valve towards a combustion chamber of an engine; a pump cavity; a pump element that divides the pump cavity into a pump chamber and an actuation chamber; a fuel conduit through which slurry fuel is flowable from the pump chamber to the fuel outlet valve; and an actuation fluid conduit through which actuation fluid is flowable from the actuation chamber to the fuel outlet valve.

Disclosed is a valve needle for a needle valve of a slurry fuel injector valve, the valve needle comprising: a tip for abutting a needle valve seat of the needle valve; a sealing portion for location in a bore of the needle valve; and a fuel chamber portion between the tip and the sealing portion, wherein the fuel chamber portion is for location in a needle fuel chamber of the needle valve; wherein a surface of the sealing portion of the valve needle comprises at least one groove and wherein at least part of the or each groove extends in a direction that is non-perpendicular to an axial direction of the valve needle.

A fuel supply valve for a slurry fuel injector valve comprises a fuel inlet in fluid communication with a slurry fuel reservoir. A fuel outlet is in fluid communication with a nozzle of the fuel injector valve. A pump chamber port is in fluid communication with a pump chamber of the fuel injector valve. A valve gate is moveable between a first position wherein the fuel inlet is in fluid communication along a first slurry fuel flow path with the pump chamber port and a second position wherein the fuel outlet is in fluid communication along a second slurry fuel flow path with the pump chamber port. Wherein the valve gate is arranged to not substantially exert a force opposing a flow on the slurry fuel into the valve chamber when the valve gate moves between the second position and the first position and/or between the first position and the second position.

A movable electrical generation system includes a generator operable to produce a supply of electrical energy, a prime mover operable to drive the generator, a first fuel, a second fuel different from the first fuel, a control system operable to deliver one of the first fuel and the second fuel to the prime mover and to control an electrical load applied to the generator based on one of a first fuel current protection limit and a second fuel current protection limit.

Unclogging group for unclogging a filter of a pumping group for pumping diesel to an internal combustion engine, the unclogging group (1) comprising: a metering unit (2) supplied by diesel leaving a low pressure pump and configured for feeding in a controlled manner the diesel to a high pressure pump; the metering unit (2) comprising an electromagnetic head (4) provided with a coil (6) and a control valve (5) for controlling the diesel flow; a filter (30) associated with the control valve (5); a temperature sensor (34) for measuring the ambient temperature; a control unit (31) coupled at one side to the temperature sensor (34) and at another side to the coil (6); wherein the control unit (31) is configured so that once it has received the starting input of the pumping group it compares the temperature measured by the temperature sensor (34) with a threshold value, and if the temperature measured by the temperature sensor (34) is less than the threshold value the control unit (31) commands a delay of the starting of the pumping group of a period wherein the control unit (31) supplies electrical current to the coil (6).

An engine (100) operable in a premixed combustion system and a diffusion combustion system. The engine (100) includes a main fuel injection valve (79), a pilot fuel injection valve (82), a liquid fuel tank (33), a main fuel supply path (121), a pilot fuel supply path (122), a pilot fuel filter (141), a pilot fuel high-pressure pump (56), a pilot fuel tank (171), and a pilot fuel supply pump (173). The pilot fuel tank (171) stores pilot fuel sent from the pilot fuel high-pressure pump (56) and not injected by the pilot fuel injection valve (82). This pilot fuel is sent to an automatic backwash filter (174) and a pilot fuel filter (141) while not passing through the liquid fuel tank (33).

A fuel tank arrangement for a dual fuel internal combustion engine includes a fuel tank arranged to supply liquid fuel to the dual fuel internal combustion engine, wherein the fuel tank arrangement includes a return conduit connected to the fuel tank and configured to supply leaked fuel from the dual fuel internal combustion engine to the fuel tank, wherein the fuel tank arrangement includes a first fuel separation arrangement positioned in fluid communication between the fuel tank and an outlet to an ambient environment thereof.

An internal combustion engine system is described herein. The system uses reactor to create pilot fuel from the primary fuel to assist in the ignition of the primary fuel. A controller is used to maintain an operational range of a level of the pilot fuel in an accumulator. The accumulator acts as a buffer to allow the engine to continue to receive the pilot fuel during dynamic and changing conditions of the engine. The controller increases or decreases the rate of production of the pilot fuel by a pilot fuel system to maintain the operational range of the level of the pilot fuel in the accumulator. The controller can receive inputs such as pilot fuel level or power signals from the engine to adjust the rate of production of the pilot fuel to meet engine demand.