EP3008318B1 - Coulisseau pour piston dans des moteurs a combustion interne - Google Patents

Coulisseau pour piston dans des moteurs a combustion interne Download PDF

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Publication number
EP3008318B1
EP3008318B1 EP14731587.3A EP14731587A EP3008318B1 EP 3008318 B1 EP3008318 B1 EP 3008318B1 EP 14731587 A EP14731587 A EP 14731587A EP 3008318 B1 EP3008318 B1 EP 3008318B1
Authority
EP
European Patent Office
Prior art keywords
piston
sliding shoe
channel
connecting rod
radially circumferential
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.)
Active
Application number
EP14731587.3A
Other languages
German (de)
English (en)
Other versions
EP3008318A1 (fr
Inventor
Matthias Laqua
Markus PINZ
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.)
KS Kolbenschmidt GmbH
Original Assignee
KS Kolbenschmidt GmbH
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Publication date
Application filed by KS Kolbenschmidt GmbH filed Critical KS Kolbenschmidt GmbH
Publication of EP3008318A1 publication Critical patent/EP3008318A1/fr
Application granted granted Critical
Publication of EP3008318B1 publication Critical patent/EP3008318B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02F—CYLINDERS, PISTONS OR CASINGS, FOR COMBUSTION ENGINES; ARRANGEMENTS OF SEALINGS IN COMBUSTION ENGINES
    • F02F3/00—Pistons 
    • F02F3/16—Pistons  having cooling means
    • F02F3/20—Pistons  having cooling means the means being a fluid flowing through or along piston
    • F02F3/22—Pistons  having cooling means the means being a fluid flowing through or along piston the fluid being liquid
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02F—CYLINDERS, PISTONS OR CASINGS, FOR COMBUSTION ENGINES; ARRANGEMENTS OF SEALINGS IN COMBUSTION ENGINES
    • F02F3/00—Pistons 
    • F02F3/0015—Multi-part pistons
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02F—CYLINDERS, PISTONS OR CASINGS, FOR COMBUSTION ENGINES; ARRANGEMENTS OF SEALINGS IN COMBUSTION ENGINES
    • F02F3/00—Pistons 
    • F02F3/28—Other pistons with specially-shaped head
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02F—CYLINDERS, PISTONS OR CASINGS, FOR COMBUSTION ENGINES; ARRANGEMENTS OF SEALINGS IN COMBUSTION ENGINES
    • F02F3/00—Pistons 
    • F02F3/28—Other pistons with specially-shaped head
    • F02F3/285—Other pistons with specially-shaped head the head being provided with an insert located in or on the combustion-gas-swept surface

Definitions

  • the invention relates to a piston of an internal combustion engine, the piston having a sliding shoe mounted in an energy accumulator and the sliding shoe having a channel for taking cooling oil into a cavity, according to the features of the preamble of patent claim 1.
  • the DE 40 18 252 describes an oil-cooled piston which is assembled from at least one upper piston part with a combustion bowl and a lower piston part.
  • the piston comprises a central cooling chamber, into which a cooling oil feed line opens, an outer cooling chamber formed by cooling bores directed obliquely outwards to the edge between the piston crown and piston skirt, as well as at least one cooling oil collection chamber connected thereto and from which at least one cooling oil discharge line starts, and from the central cooling chamber connecting lines running obliquely upwards to the bases of the cooling oil bores, at least one guide body being arranged in the outer cooling space below the cooling bores, which guide body forms a nozzle-shaped through-opening tapering towards the piston base with the inner cooling space wall and a return passage with the outer cooling space wall .
  • the FR 2 371 581 A1 shows an arrangement comprising a piston and a cylinder for an internal combustion engine, the wall of the cylinder having cooling passages, the passages being restricted to the parts of the wall surrounding the combustion zone of the cylinder, and the piston a has internal cooling system.
  • the GB 2 033 525 A describes a hydraulic ram with a ram cylinder, a piston slidable therein for direct or indirect actuation of a valve, a pressure chamber within the ram for holding oil, the volume of oil within the pressure chamber controlling the position of the piston in the ram cylinder, a reservoir for holding Oil from a pressurized oil reservoir and cam actuated means to bring the pressure chamber into communication with the reservoir and thereby adjust the position of the piston to take up backlash.
  • the U.S. 2,442,408 A shows a piston cooling device in which a part of the piston forming a piston head is a separate element from, but connected to, a part of the piston associated with a piston skirt.
  • the DE 100 22 035 A1 discloses an internal combustion engine with an assembled piston consisting of a steel piston crown and a piston skirt, which are connected to each other by a single screw arranged in the central axis or near the central axis of the piston, and with a central cooling space between the piston crown and the piston skirt, and with an oil-carrying connecting rod, which is connected to the piston skirt by a gudgeon pin.
  • the sliding shoe has the task of directing the cooling oil, which rises through the connecting rod, into the piston.
  • the sliding shoe is like that designed so that the connecting rod sits directly on the slide shoe and thereby participates in or reproduces the pivoting movement of the connecting rod.
  • the state of the art is as follows: the spring (energy accumulator) sits within the guide. As a result, the diameter and thus the pretensioning force is low, in order to raise it, certain spring effects must be present.
  • the object of the invention is to achieve a reduction in installation space between the connecting rod and the piston.
  • the energy accumulator is arranged in a radially circumferential channel formed by the piston and the sliding shoe is partially guided within the energy accumulator.
  • the task is thus solved in an advantageous manner by reducing the installation space while at the same time increasing the vertical guide length.
  • the spring coils had to be shortened and the necessary pretensioning force generated at the same time. This was achieved by increasing the spring diameter.
  • the guide of the slide shoe is now on the inside and the spring on the outside.
  • a further advantage of the structure according to the invention is that the vertical guide length of the slide shoe is increased while the installation space is reduced at the same time.
  • the radially circumferential channel formed by the piston is formed circumferentially around the sliding shoe. This structure enables the sliding shoe to be guided evenly.
  • the force accumulator exerts an even force on the sliding shoe.
  • the radially encircling channel formed by the piston also accommodates a radially encircling guide element of the sliding shoe in addition to the force accumulator.
  • the guide element serves as a point of application for the force accumulator and stabilizes the sliding shoe in the channel.
  • a sleeve limits the path of the sliding shoe. Due to the travel limited by the sleeve, the slide shoe receives a defined end stop.
  • a locking ring prevents the loss of the sliding shoe when the piston and connecting rod head separate.
  • the securing ring not only prevents the loss of the slide shoe, but also advantageously forms a further stop in the travel path of the slide shoe as an alternative or in addition to the safety function.
  • the piston has a sliding shoe for use in an internal combustion engine, comprising a lower piston part and an upper piston part, the sliding shoe having a channel for taking over cooling oil from a connecting rod head into a cavity, with an energy accumulator being guided in a channel .
  • top, bottom, left, right, front, rear, etc. refer exclusively to the exemplary representation and position of the device and other elements selected in the figures. These terms are not to be understood as limiting, that is to say these references can change as a result of different positions and/or mirror-symmetrical design or the like.
  • the figure 1 shows a piston 1 which is made up of a lower piston part 2 and an upper piston part 3 .
  • the piston 1 has a slide shoe 4.
  • the slide shoe 4 is pretensioned by means of an energy accumulator 5, designed in particular as a compression spring and further in particular as a spiral spring. In a piston-connecting rod system, this takes place against a connecting rod head 8 .
  • a disk 6 which transmits the forces from the force accumulator 5 to the sliding shoe 4 , can be arranged between the force accumulator 5 and the sliding shoe 4 , but does not have to do so.
  • a locking ring 7 is optionally provided.
  • the slide shoe 4 On a connecting rod 8 of the sliding shoe 4 is on with sliding elements on its outer circumference.
  • the slide shoe 4 has a central channel 10 for conducting a medium, for example cooling oil, into a cavity 11 of the piston 1 .
  • a medium for example cooling oil
  • the channel 10 Downward (when looking at the figures), in the direction of the connecting rod head 8, the channel 10 widens in a funnel shape. Due to the funnel-shaped structure, the medium from the connecting rod head 8 can easily in the enter channel 10.
  • the connecting rod head 8 is fed with the medium through an inflow in the connecting rod.
  • Cavity 11 is preferably located below the combustion chamber of piston 1.
  • the figure 2 shows the area of the sliding shoe 4 as a detail.
  • the figure 3 shows a detail of the guidance of the sliding shoe 4.
  • the guiding of the sliding shoe 4 takes place in a radially circumferential channel 12.
  • a radially circumferential guide element 13 of the sliding shoe 4 is displaceably mounted.
  • the channel 12 also accommodates the force accumulator 5 and the disc 6 .
  • the disk 6 is supported on the guide element 13 and is subjected to a force in the direction of the connecting rod head 8 by the energy accumulator 5 .
  • the energy store 5 is supported at its opposite end on the closed end area 14 of the channel 12 .
  • the sliding shoe 4 can, but does not have to, be guided in a central sleeve. This sleeve is formed integrally with the lower piston part 2 .
  • the wall of the sleeve forms the boundary for the channel 12 at the same time. Due to the parallel guidance of the sliding shoe 4 in the channel 12 and the sleeve, there is a stable, secure mounting of the sliding shoe 4 in the piston.

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Pistons, Piston Rings, And Cylinders (AREA)

Claims (5)

  1. Piston (1) d'un moteur à combustion interne, le piston (1) comportant un accumulateur de force (5) et une mâchoire à bride (4), la mâchoire à bride (4) comportant un canal (10) destiné à recevoir de l'huile de refroidissement dans une cavité (11) du piston (1), l'accumulateur de force (5) étant disposé dans un canal radialement circonférentiel (12) formé par le piston (1), dans lequel est guidé la mâchoire à bride (4), dans lequel la mâchoire à bride (4) est partiellement guidée à l'intérieur de l'accumulateur de force (5), et dans lequel le canal radialement circonférentiel (12) reçoit, en plus de l'accumulateur de force (5), au moins un élément de guidage radialement circonférentiel (13) de la mâchoire à bride (4), qui peut être monté de façon à pouvoir se déplacer dans le canal radialement circonférentiel (12).
  2. Piston (1) selon la revendication 1, caractérisé en ce que le canal radialement circonférentiel (12) formé par le piston (1) est formé circonférentiellement autour de la mâchoire à bride (4).
  3. Piston (1) selon l'une des revendications précédentes, caractérisé en ce qu'un manchon est prévu, la mâchoire à bride (4) étant disposée à l'intérieur du manchon et ce dernier délimitant le trajet de la mâchoire à bride (4).
  4. Piston (1) selon l'une des revendications précédentes, caractérisé en ce qu'un anneau de retenue (7) est prévu, lequel empêche la perte de la mâchoire à bride (4) dans l'éventualité d'une séparation du piston (1) et de la tête de bielle (8).
  5. Piston (1) selon l'une des revendications précédentes, caractérisé en ce que la mâchoire à bride (4) forme le canal (10) destiné à transférer de l'huile de refroidissement à partir d'une tête de bielle dans la cavité (11), l'accumulateur de force (5) étant conçu comme un ressort hélicoïdal et étant guidé dans le canal radialement circonférentiel (12) formé par le piston (1).
EP14731587.3A 2013-06-14 2014-06-13 Coulisseau pour piston dans des moteurs a combustion interne Active EP3008318B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102013211215 2013-06-14
PCT/EP2014/062370 WO2014198891A1 (fr) 2013-06-14 2014-06-13 Coulisseau pour piston dans des moteurs a combustion interne

Publications (2)

Publication Number Publication Date
EP3008318A1 EP3008318A1 (fr) 2016-04-20
EP3008318B1 true EP3008318B1 (fr) 2022-11-02

Family

ID=50979743

Family Applications (1)

Application Number Title Priority Date Filing Date
EP14731587.3A Active EP3008318B1 (fr) 2013-06-14 2014-06-13 Coulisseau pour piston dans des moteurs a combustion interne

Country Status (5)

Country Link
US (1) US10047694B2 (fr)
EP (1) EP3008318B1 (fr)
CN (1) CN105283656B (fr)
DE (1) DE102014211357A1 (fr)
WO (1) WO2014198891A1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102016202643A1 (de) * 2016-02-22 2017-08-24 Mahle International Gmbh Kolben einer Brennkraftmaschine

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2369906A (en) * 1941-12-29 1945-02-20 Aluminum Co Of America Engine cooled piston
US2442408A (en) * 1944-09-15 1948-06-01 Specialloid Ltd Piston cooling construction
FR2371581A1 (fr) * 1976-11-18 1978-06-16 Nat Res Dev Ensemble d'un piston et d'un cylindre a systeme de refroidissement limite pour moteurs a combustion interne
GB2033525A (en) * 1978-10-09 1980-05-21 Ford Motor Co Hydraulic tappet
DE4018252A1 (de) * 1990-06-07 1991-12-12 Man B & W Diesel Ag Oelgekuehlter kolben

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10022035A1 (de) 2000-05-05 2001-11-08 Mahle Gmbh Verbrennungsmotor mit einem gebauten Kolben
CN202970935U (zh) * 2012-10-31 2013-06-05 重庆普什机械有限责任公司 发动机活塞

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2369906A (en) * 1941-12-29 1945-02-20 Aluminum Co Of America Engine cooled piston
US2442408A (en) * 1944-09-15 1948-06-01 Specialloid Ltd Piston cooling construction
FR2371581A1 (fr) * 1976-11-18 1978-06-16 Nat Res Dev Ensemble d'un piston et d'un cylindre a systeme de refroidissement limite pour moteurs a combustion interne
GB2033525A (en) * 1978-10-09 1980-05-21 Ford Motor Co Hydraulic tappet
DE4018252A1 (de) * 1990-06-07 1991-12-12 Man B & W Diesel Ag Oelgekuehlter kolben

Also Published As

Publication number Publication date
CN105283656B (zh) 2019-01-15
EP3008318A1 (fr) 2016-04-20
DE102014211357A1 (de) 2014-12-18
US20160146151A1 (en) 2016-05-26
CN105283656A (zh) 2016-01-27
WO2014198891A1 (fr) 2014-12-18
US10047694B2 (en) 2018-08-14

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