Abstract: A method is provided for maintaining a gas turbine engine installed on an aircraft, the gas turbine engine including an electric machine mounted at least partially inward of a core air flowpath of the gas turbine engine. The method includes removing a rotor mount connecting a rotor of the electric machine to a rotary component of the gas turbine engine; removing a stator mount connecting a stator of the electric machine to a stationary component of the gas turbine engine; and removing in situ the electric machine.

Abstract: A turbomachine (105) configured to compress supercritical carbon dioxide is shown. The turbomachine comprises, in fluid flow series, an inlet (201), an inducerless radial impeller (202) having a plurality of blades, and a fully vaneless diffuser (203).

Abstract: Recovering heat from a Natural Gas Liquid (NGL) fractionation plant via a waste heat recovery heat exchanger network including heating a buffer fluid in a heat exchanger with a stream from the NGL fractionation plant and discharging the heated buffer fluid to an integrated triple cycle system. Generating cooling capacity for the NGL fractionation plant via the integrated triple cycle system with heat from the buffer fluid.

Abstract: A method of precision manufacture of an outer arm of a rocker arm assembly is performed by determining structures of a rough outer arm that would require precision processing and locations to support the structures as they are processed. Starting with at least one structure requiring precision processing, locations on the outer arm close to the structure to hold the outer arm during processing are determined that would cause minimal distortion of the outer arm during processing. The outer arm is then provided with clamping lobes at these locations. The clamping lobes of the outer arm are clamping into a fixture for manufacturing. The slider pad may now be precision ground while the outer arm is clamped in the fixture with minimal risk of distortion of the outer arm.

Abstract: Improvements in a vertical sliding valve arm has been disclosed with systems and methods related to eliminating the common pivot-type rocker arm and reversing the use of the valve spring in internal combustion engines. More specifically, the camshaft lobes activate a sliding valve arm to close the engine valve instead of opening it and the valve spring is used to push open the valve instead of closing it.

Abstract: A method of continuously variable valve duration (CVVD) location learning may include when current position information applied to valve duration control in a CVVD system is not detected by a controller, executing a re-learning mode in which re-learning of short duration and long duration is performed by classifying a situation, in which the current position information is not detected, into a plurality of non-detection situations.

Abstract: There is provided a balancer device for an internal combustion engine that suppresses lubricating oil from failing onto a reduction gear and a pump drive gear provided to drive and rotate an oil pump and thereby suppresses an increase in resistance against rotation between the reduction gear and the pump drive gear. The balancer device for the internal combustion engine includes a lower side housing on which a balancer drive gear, a first balancer shaft including a first balance weight, a first gear, a second gear, a second balancer shaft including a second balance weight, and the reduction gear are mounted.

Abstract: A method for controlling a continuously variable transmission is a control method for controlling in/out of oil to/from a primary oil chamber by using an oil pump provided in an oil passage between the primary oil chamber and a secondary oil chamber. The method for controlling the continuously variable transmission includes: a current command value calculation step of calculating a current command value for the oil pump in accordance with an operating state; a current limiting step of limiting the current command value to a lower-limit current at which belt slip does not occur when an oil pressure in the primary oil chamber falls below a lower-limit oil pressure in the primary oil chamber at which the belt slip does not occur; and a pump control step of driving the oil pump by using the current command value to control a piston position of the primary oil chamber.

Abstract: Methods and systems are provided for preemptively heating engine oil prior to an engine start using an inductive heating mat. In one example, a method may include coupling a magnetic field between a primary coil housed in the inductive heating mat and a ferrous oil pan to inductively heat engine oil contained in the oil pan. While maintaining engine oil temperature above a threshold temperature, heated engine oil may then be circulated through engine components to warm up the engine prior to engine start.

Abstract: An engine is provided with a timing chain cover that covers a side where a timing chain is arranged in a spaced apart manner from the side of the engine. An oil jet extending in an output shaft direction is a hollow member including therein an oil passage. One end portion of the oil jet in the output shaft direction is supported in a hole formed in the engine, and the other end portion of the oil jet extends toward the timing chain cover but does not come into contact with the timing chain cover. A pressing part arranged in a spaced apart manner from the timing chain cover in the output shaft direction is located between the other end portion and the timing chain cover in the output shaft direction, and the pressing part is in contact with the other end portion.

Abstract: Various methods and systems are provided for an oil filter system for a vehicle system. In one example, an oil filter system comprises a housing within which a plurality of oil filter elements are disposed and a frame supporting the housing, the frame including one or more mountings configured to support one or more vehicle sub-assemblies.

Abstract: An oil separator unit including an upstream member having an opening through which the blowby gas passes, a downstream member having a hit portion hit by the blowby gas, and a porous member trapping the oil mist contained in the blowby gas that has passed through the through hole. The upstream member includes an upstream surface facing a first surface of the porous member and a pair of recesses formed in substantially U-shapes along circumference portions in both end sides on an upstream surface of the upstream member, and the downstream member includes a pair of flange parts formed in substantially U-shapes so as to fit in the pair of recesses.

Abstract: An oil separator unit including an upstream member having an opening through which the blowby gas passes, a downstream member having a hit portion hit by the blowby gas, and a porous member trapping the oil mist contained in the blowby gas that has passed through the through hole. The upstream member includes and a spacer projected from an upstream surface facing a first surface of the porous member to support the first surface, the downstream member includes a rib projected from a downstream surface facing a second surface of the porous member to support the second surface, and the spacer is extended along a first direction and the rib is extended along a second direction substantially perpendicular to the first direction.

Abstract: An oil mist separator includes a case, an oil collecting portion, and a gradual change portion. The case includes a case main body, an inlet for blow-by gas provided on an upstream side of the case main body in a flowing direction of the blow-by gas, and an outlet for blow-by gas provided on a downstream side in the flowing direction of the case main body. The oil collecting portion is accommodated in the case main body. The gradual change portion is provided in the case and is located in at least one of a space between the inlet and the oil collecting portion in the flowing direction and a space between the oil collecting portion and the outlet in the flowing direction. A cross-sectional flow area of the gradual change portion is gradually decreased as a distance from the oil collecting portion in the flowing direction increases.

Abstract: An air cleaner includes: an air cleaner box defining a clean chamber that is placed rearward of a dirty chamber, the clean chamber receiving air which has been introduced from front into the dirty chamber and then filtered through an air cleaner element; and funnels that are to be connected to an intake port of an internal combustion engine, the funnels protruding upward into a space within the air cleaner box from a bottom wall of the air cleaner box. The air cleaner further includes a breather chamber into which blow-by gas is introduced from the internal combustion engine, the breather chamber being placed rearward of the funnels and between the funnels and a rear wall of the air cleaner box. Accordingly, the air cleaner can further promote the air-liquid separation of blow-by gas without incurring an increase in weight of the internal combustion engine.

Abstract: A displacement regulating device, which is adapted to be disposed on an exhaust pipe body of a vehicle. The displacement regulating device includes a regulating member, which has the function of regulating the displacement of an exhaust pipe and the effect of blocking the noise generated by the exhaust pipe. The displacement regulating device includes an operating device which could be held by a hand to move back and forth of a motorcycle. When the regulating member is operated to be away from the exhaust pipe, the noise volume generated by the exhaust pipe is not restricted. When the regulating member is located adjacent to the exhaust pipe, the noise volume generated by the exhaust pipe could be reduced.

Abstract: A device for injecting a mixing gas into an exhaust gas exhaust line of an engine, the device comprising: one or more inlet openings, a plurality of walls comprising: o a first wall (31) and; o a second wall (32) having one or more outlet openings and being arranged downstream of the first wall, and means (36) for injecting the mixing gas between the first wall and the second wall, so as to allow the mixing gas and the exhaust gases to be mixed between the first wall and the second wall.

Abstract: An internal combustion engine is provided with an engine body, a catalyst device provided in an exhaust passage of the engine body and having an exhaust purification catalyst with at least an oxidation function and a microwave absorber contained in a catalyst coat layer formed inside a substrate, and a microwave emitter for irradiating the catalyst device with microwaves. A control device for the internal combustion engine is configured so that if engine startup is requested when a temperature of the exhaust purification catalyst is less than a predetermined temperature, it makes the microwave emitter irradiate the catalyst device with microwaves and operates the engine body so that an air-fuel ratio of exhaust discharged from the engine body becomes a predetermined lean air-fuel ratio leaner than a stoichiometric air-fuel ratio.

Abstract: An injector for injecting a reagent includes an axially translatable valve member positioned within a housing. A flux sleeve is surrounded by a coil of an electromagnet. A pole piece defines a return passageway for reagent to flow. A filter surrounds the pole piece and includes a cage and a mesh fixed to the cage. The cage includes a deformable first seal biasedly engaging an outer surface of the pole piece. The cage includes a second seal biasedly engaging the housing. The first and second seals define a closed volume such that all of the reagent flowing through the injector passes through the mesh.

Abstract: Diesel Exhaust Fluid is metered into an engine exhaust gas aftertreatment system having a close coupled SCR catalyst and a main SCR catalyst. The DEF is injected into two injector locations, one upstream of the close coupled SCR catalyst and another upstream of the main SCR catalyst, the quantity of DEF in each injector being based on primarily the temperature at the main SCR catalyst and the mass flow of the NOx through the aftertreatment system. This method of injection enables a relatively better fuel economy outcome while meeting the regulated tailpipe NOx emission levels and the N2O formation limits.

Abstract: Methods and systems are provided for reducing emissions and improving fuel economy for vehicles participating in car-sharing models. In one example, a method comprises while a vehicle is stationary with an engine deactivated, actively raising a temperature of an exhaust catalyst positioned in an exhaust system of the engine to maintain the temperature of the exhaust catalyst above a threshold temperature until a subsequent request for engine torque to propel the vehicle is requested. In this way, cold-starts of engines for vehicles participating in car-sharing models may occur less frequently, and accordingly release of undesired emissions to the environment may be reduced.

Abstract: A method and apparatus for heating an exhaust gas treatment system comprising a catalytic converter and a heat source, the catalytic converter having a first temperature above which the catalytic reaction is of high efficiency, whereby the heat source is controlled so as to generate a heated sub-volume of the catalyst which is in excess of the first temperature and propagates along the length of the catalytic converter such that at any one time the total conversion efficiency of catalytic converter is sufficient to remove a target amount of pollutants from the exhaust gas stream.

Abstract: Certain catalytic articles, systems or methods provide for excellent NOx conversion and are especially suitable for low temperature NOx conversion. The articles, systems and methods are suitable for instance for the treatment of exhaust gas of diesel engines. Certain articles or systems contain an upstream SCR composition and a downstream LNT composition. The substrate(s) may advantageously be electrically heated.

Abstract: A system for exhaust gas after-treatment may include a catalytic converter with an entrance surface and an exit surface, a substrate disposed between the entrance surface and the exit surface, wherein the substrate is configured to conduct the exhaust gas after-treatment at a predetermined temperature and at least one cover element disposed on the entrance surface, and wherein the at least one cover element is configured to at least partially close or at least partially open the entrance surface in relation to the predetermined temperature of the substrate.

Abstract: An exhaust gas control apparatus includes an exhaust gas control catalyst disposed in an exhaust passage, a filter disposed downstream of the catalyst, a secondary air supply device configured to supply secondary air into exhaust gas flowing into the filter at a location downstream of the catalyst in an exhaust gas flow direction, and an electronic control unit. The electronic control unit is configured to, when a temperature of the catalyst is higher than or equal to an activation temperature and an air-fuel ratio of exhaust gas emitted from an engine body is a rich air-fuel ratio, cause the supply device to supply secondary air into exhaust gas while periodically increasing or reducing the air such that the air-fuel ratio of exhaust gas flowing into the filter alternately varies between rich and lean air-fuel ratios.

Abstract: An automotive vehicle includes an internal combustion engine that combusts an air/fuel mixture thereby generating exhaust gas containing particulate matter, and an exhaust after-treatment component that collects the particulate matter. A regeneration system burns off the collected particulate matter thereby regenerating the exhaust after-treatment component. A controller obtains a model of the combustion that is based on a kinetic controlled combustion phase and a mixing controlled combustion phase, and determines a point on the model with respect to current engine conditions that indicates an amount of the particulate matter in the exhaust gas.

Abstract: Methods and systems are provided for regenerating an exhaust particulate filter based on a projected vehicle drive cycle and catalyst ammonia storage level. In one example, a method may include scheduling a PF regeneration during a regeneration window to maintain a threshold ammonia level in an exhaust catalyst, at the end of the drive cycle.

Abstract: Systems and associated methods of treating diesel exhaust in a vehicle are disclosed. An example method includes providing an exhaust aftertreatment device in an exhaust tailpipe, and a first nitrogen oxide (NOx) sensor upstream of the exhaust aftertreatment device, with the exhaust aftertreatment device configured to reduce NOx present in an exhaust flow through the exhaust aftertreatment device with a treatment fluid applied to the exhaust flow. This example method may also include measuring a concentration of NOx in the exhaust flow with the first sensor, determining an error in the measurement of the NOx concentration, and applying a learning corrective adjustment in a subsequent measurement of the NOx concentration in the exhaust flow in response to that determination. A first magnitude of the learning corrective adjustment may be based at least in part upon a second magnitude of the error in the measurement.

Abstract: Apparatuses, systems, and methods are disclosed for emissions control. An emissions monitor module measures at least one pollutant level for an exhaust gas flow produced by a combustion source and treated by a pollution control device. The at least one pollutant level may be controllable based on at least one combustion source operating parameter and at least one pollution control device operating parameter. A control module controls the at least one combustion source operating parameter and the at least one pollution control device operating parameter based on the at least one measured pollutant level.

Abstract: There is provided a water jacket spacer set in a groove-like coolant passage of a cylinder block of an internal combustion engine including cylinder bores and set in an entire circumferential direction or a part in a circumferential direction of the groove-like coolant passage when viewed in the circumferential direction, wherein a coolant passage opening through which coolant flowing on the rear surface side of the water jacket spacer passes to flow to an inner side of the water jacket spacer is formed on at least one place of upper portions of inter-bore portions, a guide wall for guiding the coolant is formed in a vicinity of the coolant passage opening, such that the coolant flows into the coolant passage opening; and an inclined wall is formed on the rear surface side of bore portions of a position where the coolant is supplied into the groove-like coolant passage, the inclined wall extending with an upward inclination to create a flow of the coolant toward the coolant passage opening.

Abstract: Methods and systems are provided for a cooling arrangement. In one example, the cooling arrangement comprises flowing coolant to only an upper portion of a cylinder head during a cold-start. The cooling arrangement comprises flowing coolant to a cylinder block, a lower portion of the cylinder-head, and the upper portion of the cylinder head outside of the cold-start.

Abstract: A control method for a cooling system includes determining, by the controller, whether the output signal of the ambient temperature sensor satisfies a predetermined an ambient low temperature driving condition, determining, by the controller, whether the output signal of the first coolant temperature sensor satisfies a predetermined first low temperature driving condition when the output signal of the ambient temperature sensor satisfies the predetermined the ambient low temperature driving condition and controlling, by the controller, the operation of the coolant control valve unit to open the first coolant passage and the third coolant passage and to close the second coolant passage when the output signal of the first coolant temperature sensor satisfies the predetermined first low temperature driving condition.

Abstract: A pressure adjustable radiator cap contains: a body screwed with a pressure adjustment assembly connected with a covering assembly. The pressure adjustment assembly includes a rotatable knob, an adjusting bolt, a push spring, and a holder. The covering assembly includes a rubber gasket, a lid, a positioning spring, and a coupling sleeve. The pressure adjustment assembly abuts against the push spring by using of a connection disc on a lower end of the adjusting bolt, and the riveting portion on the lower end of the adjusting bolt contacts with the coupling sleeve so that the pressure adjustment assembly is connected with the covering assembly. The rotatable knob is rotated to actuate the adjusting bolt to revolve so as to change a screwing force between the adjusting bolt and the body, thus adjust a closing pressure of the covering assembly to water inlet of a water tank.

Abstract: A duct assembly for a vehicle includes an intake duct having an intake port that opens rearward, a discharge duct having a discharge port that opens downward, and a protrusion. The protrusion protrudes to a position below the discharge port from a position that is forward of the discharge port and overlaps with the discharge port in the width direction of the vehicle. The protrusion has a protruding distal end face. The distance in the front-rear direction from the rear end of the protruding distal end face to the rear end of the discharge port is defined as L. The distance in the vertical direction from the lower end of the object to be cooled to the rear end of the protruding distal end face is defined as H. The value obtained by dividing the distance L by the distance H is less than 3.5.

Abstract: A control method for a cooling system is provided. The method includes determining whether the output signals of a first coolant temperature sensor and a second coolant temperature sensor satisfy a predetermined coolant overheating condition. A coolant control valve unit is operated to move the cam to a maximum position when the predetermined coolant overheating condition is satisfied. Additionally, a control temperature is determined according to an output signal of the first coolant temperature sensor and the second coolant temperature sensor and an operation of the injector is limited according to the determined control temperature.

Abstract: An intake device for a multi-cylinder engine includes an intake manifold, an intercooler, and a heat insulation member. The intake manifold has an intercooler housing that is a cylindrical body formed from a resin material and internally accommodates the intercooler; and an intake air distributor that is a cylindrical body formed of a metal material and has one opening connected to one opening of the intercooler housing, the intake air distributor distributing an intake air. The heat insulation member is interposed between another opening of the intake air distributor and the cylinder head in the multi-cylinder engine.

Abstract: A frame device for a fan module for a main cooler and for a charge air cooler of a motor vehicle, comprising a main frame for the main cooler and a charge air cooler, separate from the latter, for the charge air cooler, wherein a seal is provided between the main frame and the charge air frame. Furthermore, the invention relates to a fan module with such a frame device.

Abstract: A novel combustion chamber valve and fuel system for driven fastener hand tool is disclosed having a fuel pump disposed parallel to the combustion and piston chambers. Pressure applied a safety at the nose of the tool is activates the fuel pump in a common direction. Pressure applied on a trigger activates the valve system prior to firing in a common direction. The valve system employs a central shaft coupling three valves, an inlet valve using a novel wedged circumferential edge seal, a control valve using a novel edge circumferential seal with a ventilated support, and a charging exaust valve using a face seal.

Abstract: In a diesel engine, a crown surface of a piston is formed with a cavity which is recessed toward an opposite side of a cylinder head, and which has a circular shape in planar view, and a wall surface forming the cavity includes a lip which is formed on a peripheral edge of the cavity, and which is protruded radially inward, and the lip is formed with a plurality of notches which are recessed radially outward from the peripheral edge of the cavity, and a fuel injector is arranged at a center of the cylinder head, and formed with a plurality of injection holes oriented toward an inside of the cavity so as to radially spray fuel within the cavity, and each of the plurality of the notches is arranged between oriented directions of two adjacent injection holes.

Abstract: A multi-stage turbocharger includes a turbine housing including a first sub-housing that has a first turbine-wheel chamber and a second sub-housing that has a second turbine-wheel chamber arranged in series to the first turbine-wheel chamber, a first compressor housing coupled to the turbine housing via a first bearing housing, and a second compressor housing coupled to the turbine housing via a second bearing housing. The first sub-housing and the second sub-housing are formed integrally with each other.

Abstract: Use of the hydraulically driven device in a series configuration with a minimally restrictive turbocharger is defined which will allow a very responsive and powerful boosting system to reach boost levels of 4-5 pressure ratio (PR) to support and enable OEM engine downsizing trends. An electric supercharger is also considered. A hydraulic drive assists to increase the acceleration rate of a turbocharger impeller/turbine shaft assembly and provide a secondary means of driving the compressor impeller at lower engine speeds where exhaust gases alone does not generate adequate shaft speeds to create significant induction boost. The hydraulic circuit includes a dual displacement motor, which provides high torque for acceleration yet converts to a single motor for high-speed operation. When the exhaust driven turbine function allows compressor speeds, beyond which the hydraulic system can contribute, a slip clutch allows disengagement of the hydraulic drive.

Abstract: An aircraft propulsor that includes an exhaust combustor is disclosed. The aircraft propulsor can include an internal combustion engine and a turbocharger. The turbocharger can be spooled while motoring the internal combustion engine. For example, when restarting the internal combustion engine at high altitude, an injector and an igniter can provide fuel to the exhaust and combust fuel to spool the turbocharger, decreasing load on the engine during restarting. In another example, an electric turbocharger can be driven with an electric motor to spool the turbocharger.

Abstract: A supercharging device for an internal combustion engine of a motor vehicle includes: an exhaust-gas turbocharger having a turbine wheel that can be driven by exhaust gas from the internal combustion engine and a first compressor wheel that can be driven by the turbine wheel, by which first compressor wheel air being supplied to the internal combustion engine is compressed; an electric compressor having an electric machine and a second compressor wheel that can be driven by the electric machine, by which second compressor wheel air being supplied to the internal combustion engine is compressed; and an overrun air recirculation device associated with the first compressor wheel, by which, when there is a reduction in load on the internal combustion engine, a portion of the air compressed by the first compressor wheel can be branched off at a first point arranged downstream of the first compressor wheel and can be fed back from the first point to a second point arranged upstream of the first compressor wheel, wh

Abstract: An assembly can include a turbine housing that includes a bore, a wastegate seat, wastegate passages that extend to the wastegate seat and a divider wall disposed between the wastegate passages where the divider wall includes a divider wall surface; a rotatable wastegate shaft configured for receipt by the bore; a wastegate arm extending from the wastegate shaft; and a wastegate plug extending from the wastegate arm where the wastegate plug includes a contact portion that contacts the wastegate seat to cover the wastegate passages in a closed state and a mesh that contacts the divider wall surface in the closed state.

Abstract: An engine control device controls an engine. The control device includes a controller. The controller is configured to open the air bypass valve of the engine and close the waste gate valve of the engine when a first condition is satisfied, and thereafter determine that an execution condition of a boost pressure increase control is satisfied when a second condition is satisfied. The air-bypass valve disposed on an air-bypass passage that communicates between an upstream side and a downstream side of a compressor in an intake passage. The waste gate valve disposed on a waste gate passage that communicates between an upstream side and a downstream side of the turbine in an exhaust passage. The first condition represents a turbine pre-rotation start request, and the second condition represents a boost pressure increase request.

Abstract: A method for controlling a VG mechanism for a compressor employs a predefined VG setpoint map comprising optimum VG setpoints for the VG mechanism based on at least one predefined optimization criterion. The VG mechanism has at least three different setpoints ranging between a minimum flow area setpoint and a maximum flow area setpoint. A location of an operating point of the compressor on its compressor map is determined. Based on the location of the operating point, the VG setpoint map is consulted and an optimum VG setpoint is determined. A predictive scheme can be included for accounting for time lag of the VG mechanism's response.

Abstract: A turbocharger for an internal combustion engine is provided, where the turbocharger includes a housing, a shaft, a turbine wheel, and a compressor wheel. The shaft is rotatable with respect to the housing and defines a centerline. The turbine wheel is mounted to the shaft and is disposed within the housing. The compressor wheel is also mounted to the shaft and is disposed within the housing. The turbine wheel and/or the compressor wheel has a plurality of blades with leading edges that converge at an apex. The apex is aligned with the centerline. A method of constructing a turbocharger is also provided, where the method includes the step of performing a finishing operation on the turbine wheel and/or the compressor wheel to form an apex where the leading edges of the blades converge.

Abstract: An engine device including an engine and a carburetor that vaporizes a liquefied fuel gas from a fuel gas source for storing a liquefied fuel gas, in which a part of coolant in the engine is distributed to the carburetor. The engine device further includes a water-cooled exhaust manifold having a coolant passage for cooling an exhaust gas passage and a path switching mechanism for connecting a coolant inlet of the carburetor to a carburetor coolant outlet of the engine or to a coolant outlet of the water-cooled exhaust manifold.

Abstract: An engine includes: a cylinder head that forms an intake port connected to a combustion chamber; a throttle body that is joined to the intake port and adjusts a degree of an opening of an intake passage by rotating a throttle vale around a rotation axis of a valve shaft, the throttle vale being fixed to the valve shaft; and a case that stores a drive member and supports a drive motor, the drive member being fixed to the valve shaft, the drive motor generating a drive force that is transmitted to the drive member. The case overlaps with the intake port as seen in a side view. Accordingly, in the engine, it is possible to reduce the volume of the intake passage between the throttle valve and the combustion chamber.

Abstract: A crank drive for a reciprocating-piston engine includes a crankshaft which has at least one crank pin. At least one eccentric is rotatably arranged on the crank pin via which at least one connecting rod is to be rotatably mounted on the crank pin. A piston can be arranged so as to move in a translatory fashion in a cylinder having a variable compression ratio of the reciprocating-piston engine and can be coupled in an articulated fashion via the connecting rod to the crankshaft. At least one actuator shaft is arranged coaxially with respect to the crankshaft, by which actuator shaft the eccentric can be rotated relative to the crank pin by driving the actuator shaft. As a result, the compression ratio of the cylinder can be adjusted. An actuator element, by which the actuator shaft can be driven, is arranged at one end of the crankshaft and adjoins the actuator shaft in the axial direction of the crankshaft.