EP2550439A1 - Internal combustion engine - Google Patents
Internal combustion engineInfo
- Publication number
- EP2550439A1 EP2550439A1 EP11718894A EP11718894A EP2550439A1 EP 2550439 A1 EP2550439 A1 EP 2550439A1 EP 11718894 A EP11718894 A EP 11718894A EP 11718894 A EP11718894 A EP 11718894A EP 2550439 A1 EP2550439 A1 EP 2550439A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- crankshaft
- subunit
- internal combustion
- combustion engine
- crankshaft part
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 238000002485 combustion reaction Methods 0.000 title claims abstract description 56
- 238000006073 displacement reaction Methods 0.000 claims description 26
- 230000005484 gravity Effects 0.000 claims description 2
- 108010001267 Protein Subunits Proteins 0.000 abstract description 2
- 239000000446 fuel Substances 0.000 description 4
- 230000001133 acceleration Effects 0.000 description 3
- 230000008878 coupling Effects 0.000 description 3
- 238000010168 coupling process Methods 0.000 description 3
- 238000005859 coupling reaction Methods 0.000 description 3
- 230000003247 decreasing effect Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000000295 complement effect Effects 0.000 description 1
- 230000002706 hydrostatic effect Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D17/00—Controlling engines by cutting out individual cylinders; Rendering engines inoperative or idling
- F02D17/02—Cutting-out
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D25/00—Controlling two or more co-operating engines
- F02D25/04—Controlling two or more co-operating engines by cutting-out engines
-
- 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
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T74/00—Machine element or mechanism
- Y10T74/21—Elements
- Y10T74/2186—Gear casings
Definitions
- the invention relates to an internal combustion engine comprising a plurality of subunits each having a crankshaft part, on each of which at least one piston is received by means of a connecting rod on a crank of the crankshaft part, wherein at least a first subunit permanently operated during operation of the internal combustion engine and at least one further subunit is switched off ,
- Internal combustion engines convert chemically into kinetic energy by combustion of energy stored in the fuel by moving pistons, which are received in a reciprocating internal combustion engine on a crankshaft by means of connecting rods, up and down in accordance with the two- or four-stroke principle while rotating the crankshaft in the cylinders.
- internal combustion engines must have a wide power range to cover the power requirements of various modes such as city driving, overland and highway driving. Most internal combustion engines are oversized for an average power requirement and are therefore operated at a degraded rate of effect resulting in increased fuel demand.
- crankshaft parts of the two subunits can be coupled to one another by means of a clutch, so that under full load and closed clutch both subunits are combined and in the part load range a subunit is decoupled by opening the clutch.
- the decoupling takes place by means of an axial displacement of the decoupled subunit, wherein the crankshaft part and the connecting rod on the crankshaft cranks must be stored in axial movable bearings.
- connection and disconnection of the two subunits of the internal combustion engine is achieved by means of a device for axial displacement, which must be operated at full load with additional energy, which in turn degrades the efficiency of the internal combustion engine.
- the object of the invention is to improve the efficiency of internal combustion engines, in particular with a plurality of separable subunits.
- an internal combustion engine comprising a plurality of subunits each having a crankshaft part, on each of which at least one piston is received by means of a connecting rod on a crank of the crankshaft part, wherein at least a first subunit permanently operated during operation of the internal combustion engine and at least one more Subunit is switched off, the crankshaft parts of the at least one first subunit and an adjacent, disconnectable second subunit are rotationally connected to each other and with respect to their axes of rotation are mutually displaceable such that a registered by the crankshaft part of the first subunit in the crankshaft part of the second subunit rotational movement substantially canceled becomes.
- the axially fixed mounting of the two crankshaft parts can be maintained in their housing-fixed recordings and the connecting rods remain axially fixed to the cranks.
- the subunits may be part of an internal combustion engine in a series or V-shaped arrangement of the cylinders. In an arrangement of the cylinder in V-shape, two connecting rods may be provided on a crank of the crankshaft parts.
- the internal combustion engine may be designed according to the diesel or petrol principle and have gas exchange via camshafts or individually controlled valves.
- a single housing of the internal combustion engine is provided, in which one or more subunits with pistons, connecting rods and crankshaft parts firmly housed and one or more subunits are housed on a limited relative to the housing displaceably arranged carriages.
- crankshaft part with the connecting rods and pistons of a subunit can be mounted axially fixed on the carriage, which in turn is axially displaceably guided axially fixed and substantially perpendicular to the axis of rotation of the crankshaft part of the permanently driven subunit.
- the parallel displacement of one of the two subunits relative to the other, preferably the disconnectable subunit relative to the permanently operated subunit is effected by means of an actuator, for example a hydrodynamic, hydrostatic, electrical or from this combined actuator.
- an actuator for example a hydrodynamic, hydrostatic, electrical or from this combined actuator.
- an eccentric arm which can be extended depending on the displacement of the crankshaft parts can be provided.
- the eccentric arm is fixed to one of the crankshaft parts and rotatable on the other, for example by means of a journal.
- Such a journal can in the be included slidably or roller bearings associated crankshaft part.
- the compensated during the displacement as parallel displacement of the two crankshaft parts difference in length is compensated according to the inventive idea by means of a linear guide in Exzenterarm.
- This may be a rolling or sliding bearing linear guide, which can transmit force in the circumferential direction and is at least secured against loss in the axial direction.
- a so-called dovetail guide has proven to be advantageous in the case of a plain bearing.
- the eccentric arm is displaced on one of the crankshaft parts on its axis of rotation and on the other crankshaft part substantially at a distance corresponding to a distance between the axis of rotation of the crankshaft part and an axis of rotation of the crankshaft cranking distance from the axis of rotation of the crankshaft part and fixed to one of the crankshaft parts and to the other crankshaft part rotatably arranged.
- an advantageous embodiment of an internal combustion engine to a permanently operated subunit having a fixedly mounted relative to a housing crankshaft part wherein the crankshaft part of the turn-off subunit parallel to the axis of rotation of the crankshaft part of the permanently operated subunit (parallel) is displaced, not displaceable crankshaft part receives the Exzenterarm and the displaceable crankshaft part by means of a provided on the Exzenterarm, rotationally displaceable to the axis of rotation of the displaceable crankshaft part by an offset and depending on a displacement of the displaceable crankshaft part radially over the axis of rotation of the non-displaceable crankshaft part movable bearing journal with the non-displaceable crankshaft part rotationally connected is.
- the eccentric arm In order to utilize the Coriolis force when coupling the uncoupled subunit, the eccentric arm, with the subunit switched off, has a center of gravity outside the axis of rotation of its crankshaft part.
- the radially outer mass part of the eccentric arm experiences a rotational acceleration in the sense of a pirouette, as a result of the incipient rotation of the crankshaft part of the coupling crankshaft part, so that this is due to the decreasing radius the mass part formed moment of the parallel displacement is used and the displacement force is reduced as Aktorkraft.
- crankshaft parts of a permanently driven and a switched subunit be provided so that they are axially backlash against each other braced.
- the bracing can be done, for example, by exerting axial pressure on the eccentric arm in the coaxial arrangement of the crankshaft parts, starting from a pressure force transmitted to a crankshaft part and displacing a hydraulic piston.
- the subunits can be braced against each other axially backlash coupled unit.
- the at least one crankshaft part of the decoupled subunit receiving carriage relative to a permanently operated subunit receiving housing are clamped axially free of play.
- an operation results according to the following method: In coaxial with each other arranged crankshaft parts all connecting rods are arranged in line about an axis of rotation of the crankshaft of the internal combustion engine.
- the uniform cranks of crankshaft parts dictate the double piston stroke of this.
- the crankshaft parts are connected to each other by means of the eccentric arm, the dovetail guide is pushed together on a minimum balancing path, the bearing pin transmits the gas forces introduced via the connecting rods from the pistons into the crankshaft part of the connected subunit to the crankshaft part of the permanently operated subunit.
- the crankshaft part of the disengageable subunit together with the bearing by means of the actuator is preferably displaced within half a crankshaft revolution into a position spaced from the axis of rotation of the crankshaft part of the permanently operated subunit, which is essentially at a distance of the axis of rotation of a crank to the axis of rotation of a crankshaft part equivalent.
- the eccentric arm on his linear guide as dovetail joint is extended accordingly. Due to the kinematic conditions of the eccentric lever results in the set position of the disconnected subunit despite a rotational drive of the eccentric lever by the crankshaft part of the permanently operated subunit no rotation of the crankshaft part.
- FIG. 1 shows an oblique view of an internal combustion engine with two couplable subunits, omitting the cylinder housing in the coupled state of the two subunits,
- Figure 2 is an oblique view of the internal combustion engine of Figure 1 in uncoupled
- FIG 3 shows the internal combustion engine of Figures 1 and 2 in section and coupled
- FIG 4 shows the internal combustion engine of Figures 1 to 3 in partial section at uncoupled
- FIG. 5 shows the internal combustion engine of FIGS. 1 to 4 in a section transverse to the running direction of the pistons
- Figure 6 is an oblique view of the separate subunits in the coupled
- Figure 1 shows the internal combustion engine 1 in a schematic oblique view with the sub-units 2, 3, each with two arranged in series, by means of the connecting rods 4, 4a arranged on the crankshaft parts 5, 6 pistons 7, 7a.
- the pistons 7, 7a are guided in a cylinder housing, not shown, along a predetermined by the cranks 8 of the crankshaft parts 5, 6 piston stroke and form with this and a cylinder head also not shown with valves for controlling the gas exchange and optionally ignition the displacement of the internal combustion engine.
- the two subunits 2, 3 are connected to one another by means of the two housing parts 9, 10, which may also be combined to form a common housing 11.
- the subunit 2 is provided as a permanently operated subunit of the internal combustion engine, the is operated during operation of the internal combustion engine -Limmer, while the subunit 3 is designed to be switched off.
- the Kurbeiwellenteil 5 of the subunit 2 is fixedly mounted in the housing part 9 and thus firmly around the axis of rotation 12 rotatably received in the common housing 11.
- the crankshaft part 6 of the subunit 3 with the axis of rotation 12 is mounted axially fixed on the carriage 14, which is displaceable relative to the housing part 10 and thus relative to the housing 11 parallel to the axis of rotation 12.
- the carriage 14 is displaceable by the distance 18, which essentially corresponds to the distance 19 between the rotation axis 13 and the rotation axis 20 of the crank 8, by which the connecting rods 4 are rotatable about the offset 8.
- the rotational closure connection 16 is effective, which is formed from the Exzenterarm 17 with a length compensation, which causes in the state shown here the coaxial arrangement of the axes of rotation 12, 13 of the crankshaft parts 5, 6, a rotational coupling of the two crankshaft parts, so in that the torque introduced into the crankshaft part 5 as a result of the combustion of fuel in the displacements and the following acceleration of the pistons 7a is transferred completely to the crankshaft part 5.
- Figure 2 shows the internal combustion engine 1 of Figure 1 in the uncoupled state of the subunit 3 of the subunit 2.
- the carriage 14 is moved to the stop 21 of the housing part 10, so that corresponding to the two axes of rotation 12, 13 of the crankshaft parts 5, 6 to the Distance 19 ( Figure 1) are displaced and the axis of rotation 12 is arranged substantially coaxially to the axis of rotation 22, which has substantially the distance 19 ( Figure 1) to the axis of rotation 13.
- the rotary joint 16 is displaced so that it transmits no moment.
- a pumping movement by entrainment by the crankshaft part 5 is omitted.
- crankshaft parts 5, 6 are each axially fixed in the housing part 9 ( Figure 1) or in the carriage 14th ( Figure 1) stored.
- the connecting rods 4, 4a with the pistons 7, 7a are axially fixed in the Cranks 8 of the crankshaft parts 5, 6 with the same distance 19- between the axes of rotation 12 and 13 and the axes of rotation 20, 22 of the cranks 8 stored.
- the rotational connection 16 is formed from the variable in its length eccentric 17 with the crank pin 23.
- the crank pin 23 is rotatably received in the arranged at a distance 19 to the rotation axis 13 bearing bush 25 and positioned at affiliated subunit 3 with its axis of rotation 24 coaxial with the axis of rotation 22 of the connecting rod 4 a in the bearing bush 25 of the crankshaft part 6.
- the Exzenterarm 17 is rotatably and coaxially connected to the crankshaft part 5 of the subunit 2, so that through the radially offset by the distance 19 arrangement between the rotation axis 12 of the crankshaft part 5 and the crank shaft part 6 mounted in the crank pin 23 of the Exzenterarms 17 torque on the rotary connection 16 can be transmitted and the two crankshaft parts are coaxially connected to each other rotationally.
- the displaceable in the chamber 26 piston 27 is provided, wherein the chamber 26 is acted upon, for example by means of a rotary feedthrough with pressure medium and the piston 27 clamped against the eccentric 17. In this way, at the same time the axial compensation of the Exzenterarms be blocked.
- FIG. 4 shows the upper part of the internal combustion engine 1 arranged about the rotational axis 13 of the subunit 3 in the case of subunit 3 decoupled from the subunit 2 in partial section.
- the subunit 3 is so moved with its axis of rotation 13 relative to the axis of rotation 12 of the crankshaft part 5 that coincide with the axis of rotation 20 of the crank 8 axis of rotation 24 of the crank pin 23 and the bearing bush 25 for this coincide. Due to the coaxial arrangement of crankshaft part 5 and crank pin 23 no torque can be transmitted by means of the rotary connection 16, the crank pin 23 rotates with rotating crankshaft part 5 only in the bearing bush 25, the piston of the subunit 3, not shown, are therefore switched off.
- FIG. 6 shows the internal combustion engine 1 with subunits 2, 3 separated from each other for clarity and the positioning of the rotary closure connection 16 in the coupled state of the two subunits 2, 3.
- the coaxial arrangement of the axes of rotation 12, 13 of the crankshaft parts 5, 6 forces the eccentric arm 17 a radially spaced position of the crank pin 23 with respect to the axes of rotation 12, 13, so that the rotatably and coaxially connected to the crankshaft part 6 flap member 30, which aligns the radially spaced from the axis of rotation 13, provided for receiving the journal 23 bearing bush 25 aligns accordingly.
- Bearing bushing 25 and crank pin 23 in this case form a rotary lever with respect to the axes of rotation 12, 13 and thus transmit torque between the two crankshaft parts.
- the eccentric arm 17 has radially opposite the crank pin 23 a mass part 31 in order to achieve a uniform moment of inertia in the coupled state of the subunits.
- FIG. 7 shows, in contrast to the representation of the internal combustion engine 1 in FIG. 6, the internal combustion engine 1 with subunits 2, 3 decoupled from one another.
- the parallel displacement of the axes of rotation 12, 13 of the crankshaft parts 5, 6 displaces the eccentric arm 17 radially outwards and the crank pin 23 is displaced to the axis of rotation 12 of the crankshaft part 5.
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Shafts, Cranks, Connecting Bars, And Related Bearings (AREA)
- Transmission Devices (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102010012279 | 2010-03-22 | ||
PCT/DE2011/000194 WO2011116737A1 (en) | 2010-03-22 | 2011-02-28 | Internal combustion engine |
Publications (2)
Publication Number | Publication Date |
---|---|
EP2550439A1 true EP2550439A1 (en) | 2013-01-30 |
EP2550439B1 EP2550439B1 (en) | 2014-05-14 |
Family
ID=44070525
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP11718894.6A Not-in-force EP2550439B1 (en) | 2010-03-22 | 2011-02-28 | Internal combustion engine |
Country Status (5)
Country | Link |
---|---|
US (1) | US8739758B2 (en) |
EP (1) | EP2550439B1 (en) |
CN (1) | CN102770642B (en) |
DE (2) | DE112011100986A5 (en) |
WO (1) | WO2011116737A1 (en) |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102015213272A1 (en) * | 2015-07-15 | 2017-01-19 | Schaeffler Technologies AG & Co. KG | Torsionally rigid compensating coupling and device with such |
FR3053421B1 (en) * | 2016-06-30 | 2020-02-28 | Altran Technologies - Altran | ROTATION COUPLING DEVICE |
DE102016015112A1 (en) * | 2016-12-20 | 2018-06-21 | Deutz Aktiengesellschaft | Internal combustion engine with partial piston restriction |
CN109339945B (en) * | 2018-10-16 | 2020-09-22 | 杭州电子科技大学 | Low-pulsation-torque internal combustion engine based on sine wave suppression and cancellation |
Family Cites Families (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3017092A1 (en) * | 1980-05-03 | 1981-11-05 | Volkswagenwerk Ag, 3180 Wolfsburg | DEVICE FOR SWITCHABLE COUPLING OF TWO SHAFT PARTS WITH PRESET TURNING ANGLE ASSIGNMENT |
DE3145381A1 (en) | 1981-11-14 | 1983-05-26 | Volkswagenwerk Ag, 3180 Wolfsburg | Multicylinder reciprocating piston internal combustion engine |
US4555003A (en) * | 1983-09-19 | 1985-11-26 | Phillips Howard L | Split engine clutch |
DE19607920A1 (en) * | 1996-03-01 | 1997-09-04 | Bayerische Motoren Werke Ag | Hypocycloidal crank mechanism for reciprocating piston machines, in particular internal combustion engines |
JP2008075561A (en) * | 2006-09-21 | 2008-04-03 | Honda Motor Co Ltd | Multiple cylinder internal combustion engine |
JP4616229B2 (en) * | 2006-09-29 | 2011-01-19 | 本田技研工業株式会社 | Multi-cylinder internal combustion engine |
EP2067961B1 (en) * | 2007-12-05 | 2014-11-12 | Volvo Car Corporation | Coupling device |
-
2011
- 2011-02-28 WO PCT/DE2011/000194 patent/WO2011116737A1/en active Application Filing
- 2011-02-28 DE DE112011100986T patent/DE112011100986A5/en not_active Withdrawn
- 2011-02-28 EP EP11718894.6A patent/EP2550439B1/en not_active Not-in-force
- 2011-02-28 DE DE102011012605A patent/DE102011012605A1/en not_active Withdrawn
- 2011-02-28 CN CN201180010407.7A patent/CN102770642B/en not_active Expired - Fee Related
-
2012
- 2012-09-21 US US13/624,177 patent/US8739758B2/en not_active Expired - Fee Related
Non-Patent Citations (1)
Title |
---|
See references of WO2011116737A1 * |
Also Published As
Publication number | Publication date |
---|---|
DE102011012605A1 (en) | 2011-09-22 |
EP2550439B1 (en) | 2014-05-14 |
DE112011100986A5 (en) | 2013-04-11 |
US20130014727A1 (en) | 2013-01-17 |
WO2011116737A1 (en) | 2011-09-29 |
US8739758B2 (en) | 2014-06-03 |
CN102770642B (en) | 2015-10-21 |
CN102770642A (en) | 2012-11-07 |
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