Abstract: The present invention pertains to a spark plug jacket, e.g. for a large or high performance combustion engine, and a corresponding method of manufacturing a spark plug jacket, in particular to provide an improved sealing towards a coolant cavity. Accordingly, a spark plug jacket is suggested, comprising a contact surface for contacting a support surface of a cylinder head of a combustion engine, wherein in a first state, when a spark plug is not mounted in the spark plug jacket, at least a portion of the contact surface of the spark plug jacket defines a first angular offset to a contact surface direction defined by the support surface of the cylinder head and, in a second state, when the spark plug is mounted to the spark plug jacket, said portion defines a second angular offset, wherein the first angular offset is larger than the second angular offset.

Abstract: The present invention pertains to a method for controlling operation of an internal combustion engine configured to run on a fuel mixture of hydrogen and natural gas. The method comprises a step of obtaining temperature values measured by at least one temperature sensor provided in a cylinder head of the engine; and a step of controlling operation of the engine in dependence on the temperature values.

Abstract: The present invention refers to a device for tensioning a connecting element fastened to a component to be tightened, which comprises a fixation element for receiving and holding the connecting element; a support element for supporting the device against the component; and an actuating unit with a fluid chamber for receiving a fluid and a piston which is translationally guided in the fixation element. The actuating unit is configured for manipulating a volume of the fluid chamber by translationally actuating the piston so as to move the fixation element relative to the support element. Further, the device comprises a guiding unit for locking a relative rotational movement between the piston and the fixation element, wherein the guiding unit is arranged outside of the fluid chamber.

Abstract: The present invention pertains to a spark plug jacket, e.g. for a large or high performance combustion engine, and a corresponding method of manufacturing a spark plug jacket, in particular to provide an improved sealing towards a coolant cavity. Accordingly, a spark plug jacket is suggested, comprising a contact surface for contacting a support surface of a cylinder head of a combustion engine, wherein in a first state, when a spark plug is not mounted in the spark plug jacket, at least a portion of the contact surface of the spark plug jacket defines a first angular offset to a contact surface direction defined by the support surface of the cylinder head and, in a second state, when the spark plug is mounted to the spark plug jacket, said portion defines a second angular offset, wherein the first angular offset is larger than the second angular offset.

Abstract: An internal combustion engine is fitted with a pre-combustion chamber having first and second electrodes, each electrode extending through a respective electrode aperture located in a thermally conductive body portion of the pre-combustion chamber body which is located within the cylinder head or other engine body component outside the combustion chamber. The second electrode may be a ground electrode and is adjustable along an axis of the respective, second electrode aperture to adjust the spark gap.

Abstract: The present invention pertains A cooling system for a gas engine piston, the system comprising a cooling oil supply configured to feed a cooling oil flow to the gas engine piston, and a control device configured to control the cooling oil flow based at least on a predetermined parameter. The present invention further pertains to a gas engine comprising at least one gas engine piston and a cooling system according to any of the previous claims, wherein the gas engine piston is configured to be operable with at least one combustion gas. In addition, the present disclosure pertains to a cooling method for a gas engine piston, comprising the steps of receiving at least one predetermined parameter at the control device; controlling the cooling oil flow based on at least the predetermined parameter; and observing a sufficient cooling oil flow fed to the gas engine piston.

Abstract: Method for identifying cylinders of an internal combustion engine which are subjected to misfire during operation, comprising a step of determining whether the engine is subjected to a misfire condition; a step of measuring vibrations generated upon operating the engine; and a step of identifying at least one cylinder subjected to a misfire in dependence on the measured vibrations.

Abstract: Valves for gas engines are disclosed, in particular for wastegates arranged upstream of a turbocharger. Accordingly, a valve for a gas engine, comprises a metal housing having an opening for providing a fluid flow out of the valve, and a metal valve member configured for adjustably restricting the fluid flow through the opening, wherein the housing is made of a first material comprising a steel and wherein the valve member is made of a second material having a thermal expansion coefficient being lower than the first material. By providing the valve member and the valve housing with materials with different thermal expansion coefficients, the expansion of the valve member may be reduced during a rapid temperature increase or heating up of the valve member e.g. when the gas engine is started or accelerated.

Abstract: The present invention refers to a misfire detection method for an internal combustion engine, in particular a stationary gas engine for power generation, comprising a step of determining whether the engine is subjected to an unintended performance variation and a step of detecting a misfire condition of the engine by qualifying the unintended performance variation as being caused by a misfire during operation of the engine.

Abstract: Misfire classification method for an internal combustion engine, comprising: a step of determining whether the engine is subjected to a misfire; a step of obtaining at least one temperature signal being indicative of a temperature prevailing in a cylinder of the engine; and a step of determining a type of misfire in dependence on the obtained temperature signal.

Abstract: Fuel gas (G) is supplied via a pipe to a pre-combustion chamber of an internal combustion engine. The pre-combustion chamber is formed inside a chamber body which is received in a cavity of the engine body, while the pipe is received in a passageway of the engine body which communicates with the cavity. A seal which may be made from an elastomer comprises a wall defining an interior space opening through the wall at first, second and third openings. A first portion of the wall defining the first and second openings is arranged in the cavity so that the chamber body can be inserted through the openings into the interior space of the seal, while a second portion of the wall comprising the third opening is received in the passageway so that the pipe can be inserted into the interior space of the seal via the third opening. The pipe is sealed in fluid communication with the pre-combustion chamber via an inlet in the chamber body by sealing regions of the seal.

Abstract: The present invention pertains to a pre-chamber body for an internal combustion engine. The pre-chamber body comprises a pre-chamber tip with a pre-chamber defined by an encircling side wall and at least one flow transfer passage fluidly connecting the pre-chamber and an exterior of the pre-chamber body (1), the flow transfer passage extending through the encircling wall, wherein the side wall is provided with at least one stiffness reduced section in proximity or adjacent to the flow transfer passage.

Abstract: The present invention pertains to a spark plug for an internal combustion engine, comprising a metal outer shell extending in a longitudinal direction from a proximal end to a distal tip end configured to be oriented towards a combustion chamber, said outer shell comprising a fixation portion for attachment of the spark plug to a metal sleeve of the internal combustion engine and arranged at a region proximal of the tip end, wherein the outer shell furthermore comprises a first contact surface arranged at a region distal of the fixation portion and configured to contact a distal end of the sleeve, when the spark plug is attached to the sleeve.

Abstract: The present disclosure refers to a method for detecting an exchange of a component of an ignition system of a spark-ignited internal combustion engine. The method comprises the step of determining at least one parameter being indicative of an operation or condition of the ignition system; and the step of detecting an exchange of the component based on a comparison of the parameter with at least one reference value.

Abstract: The present invention relates to valves for gas engines, in particular for wastegates arranged upstream of a turbocharger. Accordingly, a valve for a gas engine, is suggested comprising a metal housing having an opening for providing a fluid flow out of the valve, and a metal valve member configured for adjustably restricting the fluid flow through the opening, wherein the housing is made of a first material comprising a steel alloy and wherein the valve member is made of a second material having a thermal expansion coefficient being lower than the first material. By providing the valve member and the valve housing with materials with different thermal expansion coefficients, the expansion of the valve member may he reduced during a rapid temperature increase or heating up of the valve member e.g. when the gas engine is started or accelerated.

Abstract: Fuel gas (G) to a pre-combustion chamber of an internal combustion engine. The pre-combustion chamber is formed inside a chamber body which is received in a cavity of the engine body, while the pipe is received in a passageway of the engine body which communicates with the cavity. A seal which may be made from an elastomer comprises a wall defining an interior space opening through the wall at first, second and third openings. A first portion of the wall defining the first and second openings is arranged in the cavity so that the chamber body can be inserted through the openings into the interior space of the seal, while a second portion of the wall comprising the third opening is received in the passageway so that the piped can be inserted into the interior space of the seal via the third opening. The pipe is sealed in fluid communication with the pre-combustion chamber via an inlet in the chamber body by sealing regions of the seal.

Abstract: The present invention refers to a device for tensioning a connecting element fastened to a component to be tightened, which comprises a fixation element for receiving and holding the connecting element; a support element for supporting the device against the component; and an actuating unit with a fluid chamber for receiving a fluid and a piston which is translationally guided in the fixation element. The actuating unit is configured for manipulating a volume of the fluid chamber by translationally actuating the piston so as to move the fixation element relative to the support element. Further, the device comprises a guiding unit for locking a relative rotational movement between the piston and the fixation element, wherein the guiding unit is arranged outside of the fluid chamber.

Abstract: The present invention refers to a device for tensioning a connecting element fastened to a component to be tightened. The device comprises an engagement element connectable to the connecting element, and an actuating unit for translating a rotational movement applied to an actuating element into a translational movement of the engagement element relative to the component. Further, the device comprises a gear unit configured to transform an input torque applied to a transmission input element into an output torque applied to the actuating element which absolute value is higher compared to the input torque.

Abstract: The present invention refers to a device for tensioning a connecting element fastened to a component to be tightened, which comprises an engagement element having an engagement section receiving and holding the connecting element, a support element configured to support the device against the component, and an actuating unit having a fluid chamber for receiving a fluid, wherein the actuating unit is configured to manipulate a volume of the fluid chamber so as to move the engagement element relative to the support element. The device further comprises a vent opening fluid-communicatively connectable to the fluid chamber which is disposed in the region of the engagement section.

Abstract: The present invention pertains to a method of determining a lubrication oil condition of a stationary gas engine comprising the steps of retrieving a lubrication oil temperature information and retrieving a lubrication oil level information from a lubrication oil level sensor, wherein the lubrication oil level sensor is a capacitance sensor, and a step of normalizing a lubrication oil level information over the lubrication oil temperature information.