EP4321728A1 - Moteur à piston rotatif - Google Patents

Moteur à piston rotatif Download PDF

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Publication number
EP4321728A1
EP4321728A1 EP23180620.9A EP23180620A EP4321728A1 EP 4321728 A1 EP4321728 A1 EP 4321728A1 EP 23180620 A EP23180620 A EP 23180620A EP 4321728 A1 EP4321728 A1 EP 4321728A1
Authority
EP
European Patent Office
Prior art keywords
cooling channel
rotary piston
cooling medium
housing
piston engine
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.)
Pending
Application number
EP23180620.9A
Other languages
German (de)
English (en)
Inventor
Wolfgang Baier
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Winkelmann Wankel GmbH
Original Assignee
Winkelmann Wankel GmbH
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Winkelmann Wankel GmbH filed Critical Winkelmann Wankel GmbH
Publication of EP4321728A1 publication Critical patent/EP4321728A1/fr
Pending legal-status Critical Current

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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
    • F02B55/00—Internal-combustion aspects of rotary pistons; Outer members for co-operation with rotary pistons
    • F02B55/08—Outer members for co-operation with rotary pistons; Casings
    • F02B55/10—Cooling thereof
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01C—ROTARY-PISTON OR OSCILLATING-PISTON MACHINES OR ENGINES
    • F01C21/00—Component parts, details or accessories not provided for in groups F01C1/00 - F01C20/00
    • F01C21/06—Heating; Cooling; Heat insulation
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01C—ROTARY-PISTON OR OSCILLATING-PISTON MACHINES OR ENGINES
    • F01C1/00—Rotary-piston machines or engines
    • F01C1/22—Rotary-piston machines or engines of internal-axis type with equidirectional movement of co-operating members at the points of engagement, or with one of the co-operating members being stationary, the inner member having more teeth or tooth- equivalents than the outer member
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01C—ROTARY-PISTON OR OSCILLATING-PISTON MACHINES OR ENGINES
    • F01C21/00—Component parts, details or accessories not provided for in groups F01C1/00 - F01C20/00
    • F01C21/10—Outer members for co-operation with rotary pistons; Casings
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01P—COOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES
    • F01P7/00—Controlling of coolant flow
    • F01P7/14—Controlling of coolant flow the coolant being liquid
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01P—COOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES
    • F01P7/00—Controlling of coolant flow
    • F01P7/14—Controlling of coolant flow the coolant being liquid
    • F01P7/16—Controlling of coolant flow the coolant being liquid by thermostatic control
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01P—COOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES
    • F01P7/00—Controlling of coolant flow
    • F01P7/14—Controlling of coolant flow the coolant being liquid
    • F01P2007/143—Controlling of coolant flow the coolant being liquid using restrictions
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01P—COOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES
    • F01P7/00—Controlling of coolant flow
    • F01P7/14—Controlling of coolant flow the coolant being liquid
    • F01P2007/146—Controlling of coolant flow the coolant being liquid using valves
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C2240/00—Components
    • F04C2240/30—Casings or housings

Definitions

  • the invention relates to a rotary piston engine according to the independent claim.
  • the invention relates to the technical field of rotary piston engines that work according to the four-stroke principle of internal combustion engines, such as Wankel piston engines.
  • a triangular circular piston rotates in a housing.
  • the (arched-triangular) circular piston consists of three flattened circular arcs and constantly touches a double-arched housing wall as it rotates.
  • the housing comprises an inlet and an outlet as well as one or more spark plugs, the inlet, the outlet and the spark plugs being arranged separately from one another in such a way that the rotary piston in a predetermined position separates the respective chamber volumes with the inlet, outlet and spark plugs.
  • the Wankel engine Since the inlet and outlet are spatially separated from the combustion chamber, the Wankel engine is very suitable for operation with hydrogen.
  • hydrogen the disadvantage of incomplete combustion due to the unfavorably shaped combustion chamber is not critical because the unburned fuel emitted is harmless to the environment.
  • the use of hydrogen as a fuel is becoming increasingly important.
  • the rotary piston engine has the highest temperatures in the housing area of the spark plugs towards the outlet and the lowest temperatures in the area after the inlet towards the spark plugs.
  • cooling mixture never flows past in the area between the spark plug and the outlet, in contrast to a reciprocating piston engine where the combustion chamber is cooled by the sucked-in mixture during the intake stroke. This leads to a very uneven thermal load on the housing of the rotary piston engine.
  • a special load arises from the fact that ignition occurs with every revolution, which results in a high ignition sequence with a correspondingly high thermal load compared to the reciprocating four-stroke engine.
  • a radial cooling water guide is known for dissipating the heat, with the housing being provided with a cooling channel in sections (in the hot arc) against the direction of rotation of the rotary piston, through which a coolant flows. It is also known to cool the side parts of the housing with a coolant.
  • the invention has set itself the task of minimizing the thermal load and, in particular, of providing the cooling medium accordingly in order to ensure efficient heat dissipation.
  • the invention comprises a rotary piston engine with a housing and a rotary piston rotating in the housing.
  • the housing comprises a central housing part with a housing wall surrounding the circumferential circular piston.
  • the middle housing part is covered by a first cover part and a second cover part on opposite sides to form a closed housing interior.
  • the middle housing part comprises an inner cooling channel, the first cover part has a first outer cooling channel and the second cover part has a second outer cooling channel into which a cooling medium passes flows in through an inlet and the cooling medium flows out of it via an outlet.
  • the inlet comprises a metering element which is designed to supply a different amount of coolant to the inner cooling channel and to the first outer cooling channel and the second outer cooling channel, respectively.
  • the metering element is designed such that the amount of cooling medium supplied to the inner cooling channel, the first outer cooling channel and the second outer cooling channel is selected such that the temperature difference of the cooling medium from the cooling channels at the outlet is less than 5%.
  • the metering element can have a size and shape in order to meter the cooling medium accordingly so that a specified minimum temperature difference is not fallen below.
  • the metering element is preferably designed such that the amount of cooling medium supplied to the inner cooling channel and the amount of cooling medium supplied to the first outer cooling channel and the second outer cooling channel have a deviation in the range of less than 5%.
  • the amount of cooling medium supplied to the first outer cooling channel and the second outer cooling channel is identical.
  • the amount of cooling medium supplied to the inner cooling channel in the range from 65% to 75% (5% to 15%) of the amount of cooling medium supplied. In practice, these volume flows have led to good dissipation of the heat generated in all parts of the housing.
  • the metering element comprises a metering sleeve.
  • the metering sleeve is, for example, a metal sleeve onto which an inlet hose for the cooling medium can be inserted and the openings into the respective cooling channels has, whereby the openings can be dimensioned in cross section according to the desired flow rate.
  • the size and shape of the dosing sleeve is designed in such a way that it can be inserted into the inlet.
  • the metering sleeve advantageously comprises a first opening for supplying the cooling medium to the first outer cooling channel, a second opening for supplying the cooling medium to the inner cooling channel and a third opening for supplying the cooling medium to the second outer cooling channel.
  • the openings can be different in number and size for each cooling channel.
  • the metering sleeve comprises two second openings for supplying the cooling medium to the inner cooling channel.
  • Fig. 1 is a partially vertical sectional view (without rotating rotary piston) of a rotary piston engine with housing 1 consisting of central housing part 11 and first cover part 12 and second cover part 13 according to an exemplary embodiment of the invention.
  • the housing 1 shown has a middle housing part 11 with a housing wall 110 surrounding the rotating rotary piston.
  • the middle Housing part 11 is closed on the left side by a first cover part 12 (as a side part).
  • the middle housing part 11 is covered on the right side by a second cover part 13 (as a side part). In this way, a closed housing interior 14 is produced through which the rotary piston runs in accordance with known Wankel engines.
  • the middle housing part 11 has an inner cooling channel 111 (which has a rib in the middle) shown in the upper area.
  • the dashed sections are lateral widenings in the area of the spark plug and the exhaust channel in order to keep the cross section constant in areas where the spark plugs pass through.
  • the first cover part 12 has a first outer cooling channel 121.
  • the second cover part 13 has a second outer cooling channel 131.
  • a dosing element 4 in the form of a dosing sleeve 41 is shown in the lower area.
  • a cooling medium flows into the cooling channels via an inlet 2 in order to flow out of these again via an outlet 3 and, for example, to be fed to a cooler.
  • the metering sleeve 41 is designed with correspondingly shaped openings in order to supply a different amount of coolant to the inner cooling channel 111 and to the first outer cooling channel 121 and the second outer cooling channel 131.
  • the dosing sleeve 41 is designed in size and shape in such a way that it can be inserted into the inlet 2.
  • the metering sleeve 41 has a first opening 411 for supplying the cooling medium to the first outer cooling channel 121, a second opening 412, 415 for supplying the cooling medium to the inner cooling channel 111 and a third opening 413 for supplying the cooling medium to the second outer cooling channel 131.
  • the metering sleeve 41 has two second openings 412, 415 for supplying the cooling medium to the inner cooling channel 111.
  • the metering element 4 is dimensioned in terms of shape and size (the metering bores 411, 412, 415, 413) in such a way that the water supplied to the inner cooling channel 111, the first outer cooling channel 121 and the second outer cooling channel 131 Amount of cooling medium is selected such that the temperature difference of the cooling medium from the cooling channels at the outlet 3, measured via a sensor element (not shown), is less than 5%, in particular in the range from 1% to 3%.
  • the metering element 4 is dimensioned in shape and size such that the amount of cooling medium supplied to the inner cooling channel 111 and the amount of cooling medium supplied to the first outer cooling channel 121 and the second outer cooling channel 131 have a deviation in the range of less than 5%, in particular in Range from 1% to 3%.
  • the amount of cooling medium supplied to the first outer cooling channel 121 and the second outer cooling channel 131 is identical and differs from the amount in the inner cooling channel 111.
  • the amount of cooling medium supplied to the inner cooling channel 111 may be in the range of 65% to 75% (5% to 15%) of the amount of cooling medium supplied.
  • Fig. 2 is a further sectional view of a central housing part 11 of a rotary piston engine Fig. 1 shown.
  • the inner cooling channel 111 runs over a part of the housing that is exposed to increased thermal load.
  • the cooling medium flows counterclockwise and counter to the direction of rotation of the rotary piston from the bottom inlet 2 to the top outlet 3.
  • the inner cooling channel 111 is widened outwards so that the cross section remains constant.
  • Fig. 3 is a sectional view of a housing cover part 12, 13 of a rotary piston engine Fig. 1 . shown, the one with the middle housing part Fig. 2 can be connected.
  • the first cover part 12 with the first outer cooling channel 121 and the second cover part 13 with the second outer cooling channel 131 can be explained, since these are constructed in mirror images.
  • the first outer cooling channel 121 and the second outer cooling channel 131 consist of three straight bores which form a downwardly curved cooling channel which covers the hot arch of the housing.
  • the straight holes are a particularly economical solution for manufacturing.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Pistons, Piston Rings, And Cylinders (AREA)
EP23180620.9A 2022-08-12 2023-06-21 Moteur à piston rotatif Pending EP4321728A1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102022120394.8A DE102022120394A1 (de) 2022-08-12 2022-08-12 Rotationskolbenmotor

Publications (1)

Publication Number Publication Date
EP4321728A1 true EP4321728A1 (fr) 2024-02-14

Family

ID=86942469

Family Applications (1)

Application Number Title Priority Date Filing Date
EP23180620.9A Pending EP4321728A1 (fr) 2022-08-12 2023-06-21 Moteur à piston rotatif

Country Status (4)

Country Link
US (1) US20240052776A1 (fr)
EP (1) EP4321728A1 (fr)
JP (1) JP2024025673A (fr)
DE (1) DE102022120394A1 (fr)

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1898219U (de) * 1963-08-22 1964-08-06 Nsu Motorenwerke Ag Fluessigkeitsgekuehltes gehaeuse fuer rotationskolben-brennkraftmaschinen.
US20120048411A1 (en) * 2010-08-24 2012-03-01 Woco Industrietechnik Gmbh Manifold valve and fluid circuit having a manifold valve

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102004008312A1 (de) * 2004-02-20 2005-11-17 Wankel Super Tec Gmbh Kreiskolbenbrennkraftmaschine, ausgelegt für Dieselkraftstoff
DE102004028174A1 (de) * 2004-06-09 2005-12-29 Wankel Super Tec Gmbh Kolben für eine Kreiskolbenbrennkraftmaschine

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1898219U (de) * 1963-08-22 1964-08-06 Nsu Motorenwerke Ag Fluessigkeitsgekuehltes gehaeuse fuer rotationskolben-brennkraftmaschinen.
US20120048411A1 (en) * 2010-08-24 2012-03-01 Woco Industrietechnik Gmbh Manifold valve and fluid circuit having a manifold valve

Also Published As

Publication number Publication date
JP2024025673A (ja) 2024-02-26
DE102022120394A1 (de) 2024-02-15
US20240052776A1 (en) 2024-02-15

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