Abstract: A control system is disclosed for operating an internal combustion engine. The control system includes a control unit configured for providing a part load mode that is optimized for slow operation of the engine at loads up to an upper part load limit in the range from 40% to 75% of a maximum engine load. The control unit is also configured for providing a high load mode for engine loads above the upper part load limit. In the part load mode, at least one inlet valve is closed at a closing angle later than in the high load mode.

Abstract: A fuel recirculating unit (114) for providing an engine fuel system (121) of an internal combustion engine (100) with pyrolysis oil based fuel may comprise a circulation tank (122), a fuel supply line outlet (2600) for fluidly connecting to an inlet of the engine fuel system (121), a fuel supply line (125A) for fluidly connecting the circulation tank (122) with the fuel suppy line outlet (2600), a fuel return line inlet (2610) for fluidly connecting to an outlet of the engine fuel system (121), a fuel return line (125B) for fluidly connecting the fuel return line inlet (2610) with the circulation tank (122), and at least one of a first release valve unit (126A) positioned downstream of the fuel return line inlet (2610), a second release valve unit (126A) positioned upstream of the circulation tank (122) in the fuel return line (125B), and a supply valve unit (2417) positioned upstream of the fuel supply line outlet (2600).

Abstract: A filtration system is configured to provide clean fuel to a running combustion engine. The filtration system may be configured to be connected to a main fuel tank for storing contaminated fuel, and to be connected to a fuel supply of a combustion engine. A filtration circuit may include at least one filter, a first auxiliary fuel tank for containing fuel, and a first fuel pump configured to pump the fuel from the first auxiliary fuel tank through the filtration circuit back to the first auxiliary fuel tank. A second auxiliary fuel tank may be connectable to said first auxiliary fuel tank for receiving fuel from the first auxiliary fuel tank via a transfer valve. A control unit may be configured to control the transfer valve such that the first auxiliary tank is fluidly connected to the second auxiliary fuel tank only if fuel of a desired contamination level is contained in the first auxiliary tank.

Abstract: Control systems comprising electronic control modules (104, 106) may be configured to control operation of a dual fuel internal combustion engine (1). In case of a failure of an electronic control module (104, 106), the dual fuel internal combustion engine (1) may interrupt operation. The disclosed control system and method may maintain operation of the dual fuel internal combustion engine (1) when a malfunction within an operation mode of the dual fuel internal combustion engine (1), particularly when an electronic control module (104, 106) fails, is detected.

Abstract: An ethanol-based fuel is disclosed that includes 40 to 90% by volume ethanol and 60 to 10% by volume castor oil. The fuel may also include one or more additives in a total amount of up to 10 wt. % of the total weight of the ethanol and castor oil. The ethanol-based fuel may be used for operating an internal combustion engine, and may be used as a switch-over fuel, in between using different fuels that are incompatible with each other.

Abstract: A power plant may include a power house, a tank farm, and a fuel treatment building. The power house may include an internal combustion engine adapted to be operated with pyrolysis oil based fuels. The power house may further include a conditioning and circulating system with a conditioning unit and a fuel recirculating unit, forming a fuel recirculating cycle together with an engine fuel system. The tank farm may include tanks for pyrolysis oil based fuels, a switching fuel or its components, and crude oil based fuels. The power plant may also include a first switching unit and a second switching unit to release fuel mixes from the fuel recirculating cycle. The power plant may allow switching fuels while continuously operating the internal combustion engine with various fuels.

Abstract: The present disclosure refers to a turbocharged internal combustion engine with exhaust gas recycling, comprising an intake manifold, an exhaust manifold, a fresh air turbocharger and an exhaust supercharger, wherein the intake manifold is divided by a separating wall into a fresh air passage and an exhaust passage, one of the passages being connected to inlet openings of cylinders of the engine, the fresh air passage being connected to the outlet of the compressor of the fresh air turbocharger, the exhaust passage being connected to the outlet of the compressor of the exhaust supercharger and the separating wall being formed with orifices connecting the two passages.

Abstract: A cylinder head for an internal combustion engine is configured to be operated with fuel, such as gaseous or liquid fuel, to provide a more complete combustion of the fuel/air mixture. The cylinder head has at least one fuel guiding section, which includes a fuel inlet valve casing for accommodating a fuel inlet valve configured to control a fuel flow rate, a fuel/air mixing chamber for mixing the fuel with air, and a fuel guiding portion connecting the fuel inlet valve casing to the fuel/air mixture chamber. The fuel guiding portion is integrally formed with the cylinder head and defines at least a first fuel feeding passage and at least a second fuel feeding passage. The first fuel feeding passage and the second fuel feeding passage extend from the fuel inlet valve casing to the fuel/air mixing chamber.

Abstract: A method is provided for detecting a leakage in a fuel supply system of an internal combustion engine. The fuel supply system includes a fuel line system with fuel line sections and a pressure monitoring system with monitoring segments, a set of valves, and a pressure sensor. The method includes detecting a leakage between the fuel line sections and the pressure monitoring system when the set of valves are opened to fluidly connect the monitoring segments. The method also includes performing at least two pressure measurements for at least two selected sets of neighboring monitoring segments for providing pressure behaviour information for the selected sets of neighboring monitoring segments. The method further includes comparing the pressure behaviour information of the selected sets of neighboring monitoring segments, and identifying a leaking monitoring segment based on the comparison.

Abstract: A pre-combustion chamber tip for an internal combustion engine having a first body portion with a pre-combustion chamber located within, the first body portion having a terminal end with a plurality of orifices configured to direct expanding gases out of the pre-combustion chamber and a second body portion attached to the first body portion, the second body portion having an exterior surface, a cooling fluid opening formed in the exterior surface, a cooling fluid passage in fluid communication with the cooling fluid opening, and a ridge associated with the cooling fluid opening, the ridge extending from the exterior surface and configured to divert cooling fluid flow into the cooling fluid opening and cooling fluid passage.

Abstract: A plunger for axial movement and rotation within a pump barrel of a fuel pump comprises a substantially cylindrically shaped plunger shaft made of a ceramic material, and at least one control element for controlling a rotational angle of the plunger. The at least one control element is attached to the plunger shaft.

Abstract: In one aspect, an internal combustion engine may include at least one turbocharger having an exhaust gas inlet and a turbine. An exhaust gas channel may be connected to the exhaust gas inlet of the turbocharger. In the exhaust gas system a valve may be provided that has a valve member. The valve may regulate exhaust gas directed to the turbine. The valve position may be controlled in response to a characteristic indicative of charge pressure of combustion air. In another aspect, a method may be provided for regulating the pressure of charged air delivered by a turbocharger of an internal combustion engine. The method may include regulating the exhaust gas that is directed to the turbine of the turbocharger in response to a characteristic indicative of a charge pressure of charged combustion air. In another aspect, a valve for regulating exhaust gas directed to the turbine may be provided.

Abstract: A method for controlling an injection process of an engine that is configured to operate with multiple types of fuels is disclosed. The method may comprise the steps of receiving a fuel amount request indicating a requested amount of fuel to be delivered, receiving at least one physical parameter indicating the type of fuel provided to operate the engine, providing a map comprising a control parameter in dependence of the physical parameter, reading the control parameter associated with the received physical parameter, determining an injection parameter for the injection process based on the control parameter and the requested amount of fuel, and operating the engine based on the injection parameter.

Abstract: A turbocharged internal combustion engine disclosed that may comprise an engine block with a first end side opposing a second end side and a two-stage turbocharged system. The two-stage turbocharged system may comprise a low-pressure turbocharger with a first turbine and a first compressor and a high-pressure turbocharger with a second turbine and a second compressor. A turbine connection may fluidly connect the first turbine and the second turbine and a compressor connection fluidly connects the first compressor and the second compressor. The low-pressure turbocharger is mounted at the first end side of the engine block and the high-pressure turbocharger is mounted at a second end side of the engine block.

Abstract: A power system for use in a power facility is disclosed. The power system may have a first generator set with a first engine drivingly coupled to a first generator, and a second generator set with a second engine drivingly coupled to a second generator. The power system may also have a common bus, and a controller in communication with the first and second generator sets. The controller may be configured to direct power from the first generator to the common bus, and synchronize a power output from the second generator with a power output from the first generator. The controller may be further configured to postpone power from the second generator being directed to the common bus until the first and second engines are substantially mechanically synchronized.

Abstract: An apparatus for controlling valve displacement of an internal combustion engine comprises a rocker arm having a first arm portion and a second arm portion, said rocker arm being pivotable about a pivot interposed between said first and second arm portions. The apparatus further comprises an actuation arrangement adapted to actuate said first arm portion of said rocker arm and a valve arrangement adapted to be actuated by said second arm portion of said rocker arm. A damper arrangement is pivotably connected to said first arm portion and adapted for damping movement of said rocker arm around said pivot.

Abstract: A ceramic nozzle hood used in a fuel injection nozzle system. The ceramic nozzle hood comprises a first member contact face on the inner surface extending essentially in a radial direction with respect to the longitudinal axis and a collar. The collar comprises a second member contact face, which faces away from the injection side, and a mount contact face, which faces towards the injection side. The inner chamber of the ceramic nozzle hood comprises a blind hole section fluidly connected to a remaining section of the inner chamber along the longitudinal axis through the first member contact face and to an outside of the ceramic nozzle hood via a plurality of nozzle spray holes.

Abstract: A valve stem seal (10) for a combustion engine may comprise a cylindrical body (12) including a mounting portion (16) and a valve stem sealing portion (14) integrally formed with the mounting portion (16), and an o-ring (26) configured for sealing engagement with a valve stem reciprocating in a valve guide (40) of a valve of the combustion engine. The mounting portion (16) may define an opening (18) for receiving an upper end (43) of the valve guide (40) and may be configured for substantially fluid-tight engagement with the upper end (43) of the valve guide (40). The valve stem sealing portion (14) may include an annular groove (22) formed in an inner surface of the cylindrical body (12). The o-ring (26) may be received in the annular groove.

Abstract: The present disclosure refers to a mixing pipe for mixing recirculated exhaust gas and air, preferably supplied by a high pressure compressor, and supplying a mixture of the exhaust gas and the air to a plurality of combustion chambers of an internal combustion engine. The mixing pipe may comprise a first mixing pipe section having a mixing pipe inlet and a mixing pipe outlet. The distance between the mixing pipe inlet and the mixing pipe outlet may have a predetermined length, wherein the predetermined length of the first mixing pipe section is configured to achieve a defined mixing ratio of the exhaust gas and the air at the mixing pipe outlet.

Abstract: A fuel injection system supplies fuel at high pressure to an internal combustion engine via at least two high-pressure fuel pumps and a high-pressure fuel distribution line. The high-pressure fuel pumps can operate in a first pump mode and a second pump mode, which differ in the amount of fuel that is pumped. A control unit alternately operates the high-pressure fuel pumps such that, during a first time period, at least one of the high-pressure fuel pumps is operated in the first pump mode and all other high-pressure fuel pumps are simultaneously operated in the second pump mode and such that, during a second time period, at least one of the high-pressure fuel pumps, which was operated in the second pump mode during the first time period, is operated in the first pump mode and the remaining high-pressure fuel pumps are simultaneously operated in the second pump mode.