Classifications

• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
  • F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
  • F02B75/00—Other engines
  • F02B75/16—Engines characterised by number of cylinders, e.g. single-cylinder engines
  • F02B75/18—Multi-cylinder engines
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
  • F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
  • F02B63/00—Adaptations of engines for driving pumps, hand-held tools or electric generators; Portable combinations of engines with engine-driven devices
  • F02B63/04—Adaptations of engines for driving pumps, hand-held tools or electric generators; Portable combinations of engines with engine-driven devices for electric generators
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
  • F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
  • F02B75/00—Other engines
  • F02B75/06—Engines with means for equalising torque
  • F02B75/065—Engines with means for equalising torque with double connecting rods or crankshafts
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B60—VEHICLES IN GENERAL
  • B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
  • B60K6/00—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00
  • B60K6/20—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00 the prime-movers consisting of electric motors and internal combustion engines, e.g. HEVs
  • B60K6/22—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00 the prime-movers consisting of electric motors and internal combustion engines, e.g. HEVs characterised by apparatus, components or means specially adapted for HEVs
  • B60K6/24—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00 the prime-movers consisting of electric motors and internal combustion engines, e.g. HEVs characterised by apparatus, components or means specially adapted for HEVs characterised by the combustion engines
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B60—VEHICLES IN GENERAL
  • B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
  • B60K6/00—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00
  • B60K6/20—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00 the prime-movers consisting of electric motors and internal combustion engines, e.g. HEVs
  • B60K6/42—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00 the prime-movers consisting of electric motors and internal combustion engines, e.g. HEVs characterised by the architecture of the hybrid electric vehicle
  • B60K6/46—Series type
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
  • F01B—MACHINES OR ENGINES, IN GENERAL OR OF POSITIVE-DISPLACEMENT TYPE, e.g. STEAM ENGINES
  • F01B1/00—Reciprocating-piston machines or engines characterised by number or relative disposition of cylinders or by being built-up from separate cylinder-crankcase elements
  • F01B1/10—Reciprocating-piston machines or engines characterised by number or relative disposition of cylinders or by being built-up from separate cylinder-crankcase elements with more than one main shaft, e.g. coupled to common output shaft
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
  • F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
  • F01L1/00—Valve-gear or valve arrangements, e.g. lift-valve gear
  • F01L1/02—Valve drive
  • F01L1/022—Chain drive
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
  • F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
  • F01L1/00—Valve-gear or valve arrangements, e.g. lift-valve gear
  • F01L1/02—Valve drive
  • F01L1/024—Belt drive
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
  • F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
  • F01L1/00—Valve-gear or valve arrangements, e.g. lift-valve gear
  • F01L1/02—Valve drive
  • F01L1/04—Valve drive by means of cams, camshafts, cam discs, eccentrics or the like
  • F01L1/047—Camshafts
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
  • F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
  • F01L1/00—Valve-gear or valve arrangements, e.g. lift-valve gear
  • F01L1/12—Transmitting gear between valve drive and valve
  • F01L1/14—Tappets; Push rods
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
  • F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
  • F02B75/00—Other engines
  • F02B75/06—Engines with means for equalising torque
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
  • F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
  • F02B75/00—Other engines
  • F02B75/16—Engines characterised by number of cylinders, e.g. single-cylinder engines
  • F02B75/18—Multi-cylinder engines
  • F02B75/22—Multi-cylinder engines with cylinders in V, fan, or star arrangement
  • F02B75/225—Multi-cylinder engines with cylinders in V, fan, or star arrangement having two or more crankshafts
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
  • F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
  • F02B75/00—Other engines
  • F02B75/16—Engines characterised by number of cylinders, e.g. single-cylinder engines
  • F02B75/18—Multi-cylinder engines
  • F02B75/22—Multi-cylinder engines with cylinders in V, fan, or star arrangement
  • F02B75/228—Multi-cylinder engines with cylinders in V, fan, or star arrangement with cylinders arranged in parallel banks
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
  • F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
  • F02B75/00—Other engines
  • F02B75/40—Other reciprocating-piston engines
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
  • F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
  • F16F15/00—Suppression of vibrations in systems; Means or arrangements for avoiding or reducing out-of-balance forces, e.g. due to motion
  • F16F15/22—Compensation of inertia forces
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
  • F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
  • F16F15/00—Suppression of vibrations in systems; Means or arrangements for avoiding or reducing out-of-balance forces, e.g. due to motion
  • F16F15/22—Compensation of inertia forces
  • F16F15/24—Compensation of inertia forces of crankshaft systems by particular disposition of cranks, pistons, or the like
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
  • F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
  • F16F15/00—Suppression of vibrations in systems; Means or arrangements for avoiding or reducing out-of-balance forces, e.g. due to motion
  • F16F15/22—Compensation of inertia forces
  • F16F15/26—Compensation of inertia forces of crankshaft systems using solid masses, other than the ordinary pistons, moving with the system, i.e. masses connected through a kinematic mechanism or gear system
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
  • F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
  • F16F15/00—Suppression of vibrations in systems; Means or arrangements for avoiding or reducing out-of-balance forces, e.g. due to motion
  • F16F15/22—Compensation of inertia forces
  • F16F15/26—Compensation of inertia forces of crankshaft systems using solid masses, other than the ordinary pistons, moving with the system, i.e. masses connected through a kinematic mechanism or gear system
  • F16F15/261—Compensation of inertia forces of crankshaft systems using solid masses, other than the ordinary pistons, moving with the system, i.e. masses connected through a kinematic mechanism or gear system where masses move linearly
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
  • F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
  • F16F15/00—Suppression of vibrations in systems; Means or arrangements for avoiding or reducing out-of-balance forces, e.g. due to motion
  • F16F15/22—Compensation of inertia forces
  • F16F15/26—Compensation of inertia forces of crankshaft systems using solid masses, other than the ordinary pistons, moving with the system, i.e. masses connected through a kinematic mechanism or gear system
  • F16F15/262—Masses attached to pinions, camshafts or driving shafts for auxiliary equipment, e.g. for an oil pump
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
  • F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
  • F16F15/00—Suppression of vibrations in systems; Means or arrangements for avoiding or reducing out-of-balance forces, e.g. due to motion
  • F16F15/30—Flywheels
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
  • F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
  • F02B75/00—Other engines
  • F02B75/16—Engines characterised by number of cylinders, e.g. single-cylinder engines
  • F02B75/18—Multi-cylinder engines
  • F02B2075/1804—Number of cylinders
  • F02B2075/1808—Number of cylinders two
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
  • F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
  • F16F2230/00—Purpose; Design features
  • F16F2230/0052—Physically guiding or influencing
  • F16F2230/0064—Physically guiding or influencing using a cam
• • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
  • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
  • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
  • Y02T10/00—Road transport of goods or passengers
  • Y02T10/60—Other road transportation technologies with climate change mitigation effect
  • Y02T10/62—Hybrid vehicles

Definitions

• the invention relates to a power unit according to the preamble of claim 1.
• a power unit is known, for example, from DE 10 2016 102 048 A1.
• plug-in flybrid concepts are expedient in which the vehicle has a comparatively small battery that has sufficient electrical capacity for everyday driving and can be recharged via the power grid.
• hybrid vehicles have a generator that is used to recharge the battery.
• Such a power unit as is known from DE 10 2016 102 048 A1 mentioned at the beginning, has For example, a two-cylinder reciprocating engine that is coupled to a generator to generate electricity in the vehicle.
• the generator set is not operated continuously, but switched on depending on the driving situation. Since the two-cylinder reciprocating piston engine of the generator set generates vibrations, this can lead to an uncomfortable driving experience. In particular, the quietness and freedom from vibration in the vehicle, known from purely battery-electric vehicles, can be broken by a power generator.
• the object of the invention is to provide a power unit that is characterized by particularly smooth running. It is also an object of the invention to specify a vehicle with such a power unit.
• the invention is based on the idea of specifying a power unit, in particular for a hybrid vehicle, the power unit comprising a two-cylinder reciprocating piston engine that has two pistons that are guided in two cylinders in tandem and two counter-rotating crankshafts.
• the crankshafts are connected to the piston by connecting rods. Furthermore, the power unit has at least one generator which rotates in the same direction as the first crankshaft and rotates in opposite directions to the second crankshaft.
• the generator set also has a camshaft with valve cams that are operatively connected to control valves.
• a flywheel element and a compensating camshaft are provided.
• the flywheel element is arranged on the second crankshaft or a flywheel balance shaft.
• the compensating camshaft comprises at least one compensating cam element which is operatively connected to a linearly guided compensating mass.
• first order and second order mass forces preferably to eliminate them.
• the flywheel element being designed according to the invention to compensate for these mass moments of inertia.
• the compensating camshaft serves to compensate for second-order inertia forces. In this way, in interaction with the balancing of the moments of inertia and the second-order inertia forces, particularly smooth running is achieved. In particular, smooth running is achieved which cannot be achieved with otherwise known two-cylinder reciprocating piston engines.
• the resulting effect is particularly relevant for hybrid vehicles. Since the two-cylinder reciprocating engine is switched on in different driving situations, the otherwise usual strong start-up vibrations do not occur with the generator according to the invention, so that it remains essentially imperceptible to an occupant of such a hybrid vehicle whether the generator is active or not. This creates a driving experience that is otherwise only known from battery-electric vehicles.
• the balancing mass is formed by a spring-loaded plunger.
• a spring-preloaded plunger requires little installation space, so that overall the power unit can be designed to be compact.
• a compact design is particularly preferred for use in hybrid vehicles, since this leaves more space for the passenger compartment and / or storage space inside the vehicle.
• the balancing mass in particular the spring-loaded tappet, can be guided in a sleeve which extends essentially above the balancing camshaft parallel to the cylinders. In this way, inertia forces of the second and higher order can be balanced particularly well, with a high degree of compactness of the generator being achieved at the same time.
• a particularly compact design is also achieved if the compensating camshaft is formed by the camshaft.
• the camshaft which is operatively connected to the control valves, can simultaneously act as a compensating camshaft.
• the camshaft also includes the compensating cam element and to this extent is also operatively connected to the linearly guided compensating mass.
• the compensating cam element can have two or four compensating cams.
• the number of compensating cams depends on how fast the compensating camshaft is turning. If the compensating camshaft is formed by the camshaft, then four compensating cams are useful in order to compensate for the inertia forces of the second and higher order, since the camshaft usually rotates at half the crankshaft speed. However, if the compensating camshaft is designed as a separate component and rotates, for example, at the same speed as the crankshafts, two compensating cams are sufficient to compensate for the inertia forces of the second and higher order.
• the compensating mass in particular the spring-preloaded plunger, has a rolling element or a sliding element.
• the rolling element rolls on an outer surface of the compensating cam element during operation.
• the alternatively provided sliding element slides during operation on an outer surface of the compensating cam element.
• the compensating camshaft has a first compensating cam element and a second compensating cam element.
• the first compensating cam element can be operatively connected to a first linearly guided compensating mass and the second compensating cam element to a second linearly guided compensating mass.
• the compensating cam elements are arranged at the same distance from a center point of the compensating camshaft. If the compensating camshaft is formed by the camshaft, it is particularly preferred if the valve cams are arranged between the first compensating cam element and the second compensating cam element.
• the compensating camshaft has a drive wheel which is operatively connected to the first and / or the second crankshaft via a timing belt or a timing chain.
• the crankshafts in particular the first crankshaft and the second crankshaft, preferably each have interlocking spur gears. It is particularly preferred if the drive wheel of the compensating camshaft is arranged on an engine side opposite the spur gears. Such a design leads, on the one hand, to the fact that the power unit as a whole retains a very compact design.
• crankshafts can be connected to the generator on the side opposite the drive wheel, for example via a traction device or a gear transmission, in particular with an intermediate gear.
• a particularly compact design of the power unit can also be achieved if, as is provided in a preferred embodiment, the sleeve is formed in one piece and / or integrally with a motor housing.
• the balancing mass can be guided linearly in a guide that is designed as part of the motor housing.
• the motor housing can be designed as a cast part, a guide channel for the compensating mass being provided in the cast part.
• a secondary aspect of the invention relates to a vehicle, in particular a hybrid vehicle with a power unit as described above.
• the invention is explained in more detail below using an exemplary embodiment with reference to the accompanying schematic drawings. Show in it:
• Fig. 1 a cross-sectional view of an inventive
• FIG. 2 a longitudinal sectional view through the power unit according to FIG. 1; FIG. and
• FIG. 3 a rear view of the power unit according to FIG. 1.
• the generator set according to the embodiment shown in the drawings comprises a two-cylinder Flub piston engine with two cylinders 1, 2 and a generator 5 which is coupled to the Flub piston engine.
• the two-cylinder Flub piston engine is designed with cylinders 1, 2 in tandem, each cylinder 1, 2 being assigned a crankshaft 3, 4.
• the crankshafts run parallel to one another and are rotatably coupled to one another via spur gears 9.
• the generator 5 is operatively connected to a first crankshaft 3, so that the generator 5 has the same direction of rotation as the first crankshaft 3.
• the generator 5 is coupled to a spur gear 9 of the first crankshaft 3 via an intermediate gear 22 (FIG. 3).
• the second crankshaft 4 also has a spur gear 9 which is rotatably connected to the spur gear 9 of the first crankshaft by a toothing.
• the second crankshaft 4 rotates in the opposite direction to the first crankshaft 3 and thus also in the opposite direction to the generator 5.
• the floating piston motor preferably has a flywheel element 21.
• the flywheel element 21 is arranged on the second crankshaft 4. 3 shows the arrangement of the flywheel element 21 on the second crankshaft 4.
• the flywheel element 21 is preferably connected in a rotationally fixed manner to the spur gear 9 of the second crankshaft 4. Alternatively, it is possible to provide a separate flywheel balance shaft that carries the flywheel element 21.
• the flywheel balance shaft can, for example, be arranged as a mirror image of the generator 5 and be operatively connected to the second crankshaft 4.
• the flywheel element 21 is formed by a second generator 5, which is connected to the second crankshaft 4 in a mirror-inverted manner. This design also has the advantage that the power unit can generate a higher electrical output power.
• a compensating camshaft 10 is provided in the exemplary embodiment of the power unit shown in the figures, which acts on compensating masses 13 which move linearly and parallel to the piston in the cylinders 1, 2.
• the compensating camshaft 10 is specifically formed by the camshaft 6, which is used to control the control valves 8 of the reciprocating piston engine.
• the camshaft 6 has a double function. On the one hand, it controls the control valves 8 and, on the other hand, it also causes the linear movement of the balancing masses 13 and thus serves as a balancing camshaft 10.
• the camshaft 6 has several valve cams 7 (FIG. 2).
• the valve cams 7 are arranged between two ball bearings 19 which hold the camshaft 6 in a motor housing 20. Outside the ball bearings 19, the camshaft 6 or compensating camshaft 10 each have compensating cam elements 11.
• two compensating cam members 11, i.e. first and second compensating cam members 11, are provided.
• the compensating cam elements 11 are preferably spaced from the center point of the compensating camshaft 10 by the same amount, so that tilting moments on the compensating camshaft 10 are also compensated.
• a compensating mass 13 is assigned to each compensating cam element 11. Specifically, the first compensating cam element 11 acts on a first compensating mass 13 and the second compensating cam element 11 acts on a second compensating mass 13.
• the compensating masses 13 are each designed as tappets 14 that are guided in sleeves 17.
• the sleeves 17 are more integral Part of the motor housing 20. In other words, the motor housing 20 has sleeve-like recesses in which the tappets 14 are linearly guided.
• the tappets 14 are linearly guided in the respective sleeve 17 and acted upon by a spring force via a spring 15.
• the spring force of the spring 15, which is designed as a compression spring, ensures that the plunger 14 is pressed onto the compensating cam element 11. Continuous contact between the rolling element 16 and the compensating cam element 11 is thus ensured.
• a rolling element 16 is arranged between each tappet 14 and each compensating cam element 11.
• the rolling element can be designed as a roller.
• the roller can be mounted on ball bearings or slide bearings. The roller or the rolling element 16 rolls over the compensating cam element 11.
• the compensating cam element 11 has four compensating cams 12 in each case.
• the compensating cams 12 are arranged essentially in a star shape. Specifically, the maxima of the compensating cams 12 can each be arranged at right angles to one another.
• the compensating cams 12 are arranged asymmetrically.
• the number of compensating cams 12 also depends on the design of the compensating camshaft 10.
• the compensating camshaft 10 simultaneously forms the camshaft 6, which usually rotates half as fast as the crankshafts 3, 4 during operation.
• four compensating cams 12 are useful to compensate for the second-order moments of inertia.
• two compensating cams 12 may be sufficient.
• Such an embodiment is useful, for example, when the two-cylinder reciprocating piston engine is to be equipped with overhead camshafts 6.
• the compensating camshaft 10 is then provided exclusively to compensate for the second-order moments of inertia and does not have the dual function of an additional camshaft 6 for controlling the control valves 8.
• the camshaft 6 or compensating camshaft 10 has a drive wheel 18 on an engine side opposite the spur gears 9 of the crankshafts 3, 4.
• the drive wheel 18 can be designed as a toothed wheel and connected to one of the crankshafts 3, 4 via a timing chain.
• the drive wheel 18 can also be connected to one of the crankshafts 3, 4 by drive belts.
• the drive wheel 18 is dimensioned in such a way that the camshaft 6 or compensating camshaft 10 rotates half as fast as the crankshafts 3, 4 during operation.
• the two-cylinder reciprocating engine of the generator set runs particularly smoothly.
• the generator is therefore particularly suitable as part of a drive train of a hybrid vehicle that is primarily driven by means of electric motors.
• the power unit serves as a power generator for the electrical energy required to drive the hybrid vehicle.
• the smoothness of the two-cylinder reciprocating engine makes it possible, in particular, to switch on the generator depending on the driving situation without transmitting disruptive vibrations into the interior of the vehicle.
• the noise emissions are massively reduced, so that the result can be a driving experience in the hybrid vehicle that corresponds to the driving impression of a purely electrically powered vehicle.

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• Engineering & Computer Science (AREA)
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• Physics & Mathematics (AREA)
• Acoustics & Sound (AREA)
• Aviation & Aerospace Engineering (AREA)
• Transportation (AREA)
• Hybrid Electric Vehicles (AREA)
• Valve-Gear Or Valve Arrangements (AREA)

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• 2020
  • 2020-03-05 DE DE102020001432.1A patent/DE102020001432B3/de active Active
• 2021
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  • 2021-03-03 EP EP21709969.6A patent/EP4114678A1/de active Pending
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