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 behavior information for the selected sets of neighboring monitoring segments. The method further includes comparing the pressure behavior information of the selected sets of neighboring monitoring segments, and identifying a leaking monitoring segment based on the comparison.

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 of operating a gas or dual fuel engine having a plurality of cylinders, includes monitoring a characteristic of each of the plurality of cylinders during operation of the gas or dual fuel engine. The method also includes detecting a pre-ignition condition associated with one or more cylinders of the plurality of cylinders based on the monitored characteristic. The method further includes reducing fuel supply to the one or more cylinders having the pre-ignition condition. The fuel supply to remaining cylinders of the plurality of cylinders is increased, to maintain a constant power output of the gas or dual fuel engine. The method further includes adjusting an amount of air supplied to each of the plurality of cylinders based on the increased amount of fuel supplied to the remaining cylinders, to maintain an air-to-fuel ratio within a desired range.

Abstract: A method for controlling fuel flow in a multi fuel engine is disclosed. An input power for operating the multi fuel engine at a desired engine speed is determined and a fuel flow rate based on the input power, one or more fuel properties and a specified fuel substitution ratio for apportioning the plurality of fuels is determined. Also, a correction factor for the fuel flow rate based on a desired charge density, wherein the desired charge density is based at least on a relationship between an engine load and charge density is determined and a corrected fuel flow rate, based on the determined correction factor, is output to a corresponding actuator of a fluid flow control device for the one of the fuels to cause the corresponding actuator to provide the one of the plurality of fuels at the corrected fuel flow rate.

Abstract: A plunger of a fuel pump is disclosed. The plunger may have a cylindrical base configured for axial movement and rotation within a pump barrel. The plunger may also have a fuel amount controlling end. The fuel amount controlling end may have a recessed surface region. The fuel amount controlling end may also have a sealing surface region. Further, the fuel amount controlling end may have a control interface connecting the recessed surface region with the sealing surface section in a radial direction. The transition from the recessed surface region to the control interface may be curved.

Abstract: A double walled gas valve unit controls the gaseous fuel flow within a vessel gas system. The gas valve unit may include a housing providing an outer wall, a fuel gas inlet, a fuel gas outlet, and an inert gas inlet, and a fuel line fluidly connected to the fuel gas inlet and the fuel gas outlet and extending within the housing, thereby forming an inner wall of the double walled gas valve unit. The fuel line may include a flow control valve and a block valve, a flushing line, and a flushing valve system. The flushing line is fluidly connected to the inert gas inlet. The flushing line is also fluidly connected via the flushing valve system to a storage side access point of the fuel line and to an engine side access point of the fuel line. The storage side access point is fluidly positioned between the fuel gas inlet and the block valve. The engine side access point is fluidly positioned between the block valve and the fuel gas outlet.

Abstract: A piston top structural unit for an internal combustion engine may include a piston crown structure providing a top surface and a peripheral surface, wherein, regarding a center axis of the piston, the top surface is configured to delimit the piston top structural unit axially with respect to a combustion chamber of the internal combustion engine and the peripheral surface is configured to delimit the piston top structural unit radially. The top surface may include a rim surface extending around the center axis, and an inner surface delimiting a piston bowl radially within the peripheral surface.

Abstract: A fuel supply system for an internal combustion engine may include a plurality of fuel injection pumps, each fuel injection pump being configured to pressurize fuel and provide the pressurized fuel to an associated fuel injector. The fuel supply system may further include a low-pressure fuel supply line fluidly connected to the plurality of fuel injection pumps and configured to provide fuel from a fuel supply tank to the plurality of fuel injection pumps. The fuel supply system may still further include a low-pressure fuel return line fluidly connected to the plurality of fuel injection pumps and configured to return remaining fuel from the plurality of fuel injection pumps to the fuel supply tank. The fuel supply system may include a first fuel cut-off valve disposed in the low-pressure fuel supply line and configured to stop a flow of fuel from the fuel supply tank to the plurality of fuel injection pumps.

Abstract: A radiant heat discharge arrangement for use with a internal combustion engine is disclosed. The internal combustion engine may have an outlet manifold. The radiant heat discharge arrangement may have a cover configured to over the outlet manifold with a clearance between the cover and the outlet manifold. The cover may have at least one outlet opening. The radiant heat discharge arrangement may also have an air duct having at least one air inlet fluidly connected to the at least one outlet opening of the cover. The air duct may also have an air outlet. Further, the radiant heat discharge arrangement may have a fan fluidly connected to the air outlet.

Abstract: A valve for a fuel supply of an internal combustion engine is disclosed. The valve may have a valve housing that defines a channel in fluid communication with an inert gas supply line at a first end of the valve housing. The valve housing may also have a first flange disposed at a second end distal to the first end. The valve may have a valve body that selectively allow the channel of the valve housing to communicate with an inner bore of a double-walled connecting element of the fuel supply system. The valve housing may also have a second flange disposed adjacent to the first flange. The first flange and the second flange define a detection gap therebetween. The second flange may have a passage in fluid communication with a detection space of the double-walled connecting element and the detection gap.

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 method for controlling an internal combustion engine operating on at least partly gaseous fuel is disclosed. The method may include providing a desired burn rate profile corresponding to a desired operation of the internal combustion engine. The method may further include selecting first operating parameters such that an operation of the internal combustion engine with a first gas composition produces a first burn rate profile that corresponds to the desired burn rate profile. The method may also include operating the internal combustion engine with the first operating parameters using a second gas composition. The method may include determining that the second burn rate profile differs from the desired burn rate profile. In addition, the method may include adjusting an operating parameter from among the first operating parameters of the internal combustion engine to approach the desired burn rate profile.

Abstract: A method for controlling an internal combustion engine is disclosed. The method may include receiving knock data corresponding to knock levels over a time period. The method may also include determining from the knock data whether the knock levels change over the time period. Further, the method may include determining that a variation in the gas composition of the gaseous fuel supplied to the internal combustion engine has occurred when the knock levels change over the time period. In addition, the method may include adjusting an operating condition of the internal combustion engine to adapt a knock susceptibility of the internal combustion engine to the varying gas composition.

Abstract: A control system for operating generator sets is disclosed. The control system may have control units to control operation of the generator sets. The control system may also have a data bus connected to the control units. Further, the control system may have load bus segments connected to the generator sets. The control system may also have at least one tie breaker arranged between two load bus segments to selectively connect the two load bus segments in a closed position and isolate the two load bus segments in an opened position. The at least one tie breaker may be connected to at least one of the control units. The at least one control unit may receive a first signal from the at least one tie breaker indicative of a position of the tie breaker and provide the first signal to another control unit via the data bus.

Abstract: A method for supplying fuel to an engine is disclosed. The method may include regulating a gas admission valve disposed between a gaseous fuel line and a cylinder intake port to reduce flow of gaseous fuel to the cylinder. The method may also include closing a shut-off valve disposed between a gaseous fuel reservoir and the gaseous fuel line to restrict flow of gaseous fuel from the gaseous fuel reservoir to the gaseous fuel line. Further, the method may include actuating an inert gas inlet valve disposed between an inert gas reservoir and the gaseous fuel line to supply inert gas to the gaseous fuel line and flush the gaseous fuel in the gaseous fuel line into the cylinder via the gas admission valve. Additionally, the method may include closing the inert gas inlet valve to restrict supply of inert gas to the gaseous fuel line.

Abstract: A method for controlling an engine is disclosed. The method may include receiving a pressure data set of a combustion event. The pressure data set may correspond to a temporal development of a cylinder pressure during the combustion event in a cylinder. The method may also include determining using a controller that the received pressure data set indicates an actual ignition timing within a preset ignition timing window. Further, the method may include deriving an actual combustion duration (D1) of the combustion event from the received pressure data set. The method may also include determining whether the actual combustion duration (D1) is shorter than a preset combustion duration for the cylinder. In addition, the method may include providing a control signal to control an operation of the internal combustion engine when the actual combustion duration is shorter than the preset combustion duration.

Abstract: A valve for a fuel supply of an internal combustion engine is disclosed. The valve may have a valve housing that defines a channel in fluid communication with an inert gas supply line at a first end of the valve housing. The valve housing may also have a first flange disposed at a second end distal to the first end. The valve may have a valve body that selectively allow the channel of the valve housing to communicate with an inner bore of a double-walled connecting element of the fuel supply system. The valve housing may also have a second flange disposed adjacent to the first flange. The first flange and the second flange define a detection gap therebetween. The second flange may have a passage in fluid communication with a detection space of the double-walled connecting element and the detection gap.

Abstract: A method for controlling fuel flow in a multi fuel engine is disclosed. An input power for operating the multi fuel engine at a desired engine speed is determined and a fuel flow rate based on the input power, one or more fuel properties and a specified fuel substitution ratio for apportioning the plurality of fuels is determined. Also, a correction factor for the fuel flow rate based on a desired charge density, wherein the desired charge density is based at least on a relationship between an engine load and charge density is determined and a corrected fuel flow rate, based on the determined correction factor, is output to a corresponding actuator of a fluid flow control device for the one of the fuels to cause the corresponding actuator to provide the one of the plurality of fuels at the corrected fuel flow rate.

Abstract: A single-cylinder cylinder head is disclosed. The cylinder head may have a cylinder head body having a gas system side, a pushrod side opposing the gas system side, a circular cylinder closing face with a central injector opening, a pair of inlet openings, and a pair of outlet openings. The cylinder head may have a central injector recess extending through the cylinder head body to the central injector opening. Further, the cylinder head may have a gas inlet channel system and a gas outlet channel system. The cylinder head may also have a pushrod passage extending through the cylinder head body at the pushrod side. In addition, the cylinder head may have a plurality of cylinder mounting holes extending through the cylinder head body in an outer circumferential region of the single-cylinder cylinder head. The cylinder mounting holes may be non-equidistantly arranged around the central injector recess.

Abstract: For exhaust gas recirculation in internal combustion engines operating, for example, with low sulphur marine diesel oil, an exhaust gas cooler with a cooling unit may be applied that uses a liquid injection system to maintain clean and/or clean a cooling surface of the cooling unit. The liquid injection system may provide liquid into an exhaust gas passage upstream of and or along a condensation starting region the cooling surface, thereby reducing the formation of films and deposits from particulate matter and condensing liquid of an evaporated liquid within the exhaust gas such as sulphuric acid and/or water, as those deposits could otherwise at least partially block the exhaust gas cooler.