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1. WO2011006469 - MULTI-PART PISTON FOR AN INTERNAL COMBUSTION ENGINE AND METHOD FOR THE PRODUCTION THEREOF

Publication Number WO/2011/006469
Publication Date 20.01.2011
International Application No. PCT/DE2010/000753
International Filing Date 29.06.2010
IPC
F02F 3/00 2006.01
FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
02COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
FCYLINDERS, PISTONS, OR CASINGS FOR COMBUSTION ENGINES; ARRANGEMENTS OF SEALINGS IN COMBUSTION ENGINES
3Pistons
B23K 1/00 2006.01
BPERFORMING OPERATIONS; TRANSPORTING
23MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
KSOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
1Soldering, e.g. brazing, or unsoldering
CPC
B23K 1/00
BPERFORMING OPERATIONS; TRANSPORTING
23MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
KSOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
1Soldering, e.g. brazing, or unsoldering
F02B 23/0672
FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
02COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
BINTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
23Other engines characterised by special shape or construction of combustion chambers to improve operation
02with compression ignition
06the combustion space being arranged in working piston
0672Omega-piston bowl, i.e. the combustion space having a central projection pointing towards the cylinder head and the surrounding wall being inclined towards the cylinder center axis
F02B 23/0693
FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
02COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
BINTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
23Other engines characterised by special shape or construction of combustion chambers to improve operation
02with compression ignition
06the combustion space being arranged in working piston
0678Unconventional, complex or non-rotationally symmetrical shapes of the combustion space, e.g. flower like, having special shapes related to the orientation of the fuel spray jets
0693the combustion space consisting of step-wise widened multiple zones of different depth
F02F 3/00
FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
02COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
FCYLINDERS, PISTONS OR CASINGS, FOR COMBUSTION ENGINES; ARRANGEMENTS OF SEALINGS IN COMBUSTION ENGINES
3Pistons
F02F 3/003
FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
02COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
FCYLINDERS, PISTONS OR CASINGS, FOR COMBUSTION ENGINES; ARRANGEMENTS OF SEALINGS IN COMBUSTION ENGINES
3Pistons
0015Multi-part pistons
003the parts being connected by casting, brazing, welding or clamping
Y02T 10/12
YSECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
TCLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
10Road transport of goods or passengers
10Internal combustion engine [ICE] based vehicles
12Technologies for the improvement of indicated efficiency of a conventional ICE
Applicants
  • MAHLE INTERNATIONAL GMBH [DE]/[DE] (AllExceptUS)
  • SCHULZ, Joachim [DE]/[DE] (UsOnly)
  • KORTAS, Jochen [DE]/[DE] (UsOnly)
Inventors
  • SCHULZ, Joachim
  • KORTAS, Jochen
Agents
  • POHLE, Reinhard
Priority Data
10 2009 032 941.214.07.2009DE
Publication Language German (DE)
Filing Language German (DE)
Designated States
Title
(DE) MEHRTEILIGER KOLBEN FÜR EINEN VERBRENNUNGSMOTOR UND VERFAHREN ZU SEINER HERSTELLUNG
(EN) MULTI-PART PISTON FOR AN INTERNAL COMBUSTION ENGINE AND METHOD FOR THE PRODUCTION THEREOF
(FR) PISTON EN PLUSIEURS PARTIES POUR UN MOTEUR À COMBUSTION INTERNE ET PROCÉDÉ DE FABRICATION
Abstract
(DE)
Die vorliegende Erfindung betrifft ein Verfahren zur Herstellung eines mehrteiligen Kolbens (10, 110) für einen Verbrennungsmotor mit den folgenden Verfahrensschritten: Herstellen eines Kolbenoberteils (11) und eines Kolbenunterteils (12) mit jeweils einem inneren Stützelement (22, 26; 122, 126) mit Fügeflächen (24, 28; 124, 128) und einem äußeren Stützelement (23, 27; 123, 127) mit Fügeflächen (25, 29; 125, 129), Aufbringen eines Hochtemperatur-Lotwerkstoffs im Bereich mindestens einer Fügefläche (24, 28 bzw. 25, 29; 124, 128 bzw. 125, 129), Zusammensetzen von Kolbenoberteil (11) und Kolbenunterteil (12) zu einem Kolbenkörper durch Herstellen eines Kontakts zwischen den Fügeflächen (24, 28 bzw. 25, 29; 124, 128 bzw. 125, 129), Verbringen des Kolbenkörpers in einen Vakuumofen und Evakuieren des Vakuumofens; Erwärmen des Kolbenkörpers bei einem Druck von höchstens 10-2 mbar auf eine Löttemperatur von höchstens 1300°C; Abkühlen des gelöteten Kolbens (10, 110) bei einem Druck von höchstens 10-2 mbar bis zur vollständigen Erstarrung des Hochtemperatur-Lotwerkstoffs. Die vorliegende Erfindung betrifft ferner einen mit diesem Verfahren herstellbaren Kolben (10, 110).
(EN)
The present invention relates to a method for producing a multi-part piston (10, 110) for an internal combustion engine, comprising the following method steps: producing an upper piston part (11) and a lower piston part (12), each having an inner support element (22, 26; 122, 126) having joining surfaces (24, 28; 124, 128) and an outer support element (23, 27; 123, 127) having joining surfaces (25, 29; 125, 129), applying a high-temperature solder material in the area of at least one joining surface (24, 28 or 25, 29; 124, 128 or 125, 129), assembling the upper piston part (11) and the lower piston part (12) to form a piston body by establishing a contact between the joining surfaces (24, 28 or 25, 29; 124, 128 or 125, 129), placing the piston body in a vacuum furnace and evacuating the vacuum furnace; heating the piston body at a pressure of at most 10-2 mbar to a soldering temperature of at most 1300°C; cooling the soldered piston (10, 110) at a pressure of at most 10-2 mbar until the high-temperature solder material is completely solidified. The present invention further relates to a piston (10, 110) that can be produced by means of said method.
(FR)
L'invention concerne un procédé de fabrication d'un piston en plusieurs parties (10, 110) pour un moteur à combustion interne, comportant les étapes suivantes: fabrication d'une partie supérieure de piston (11) et d'une partie inférieure de piston (12) comportant respectivement un élément support intérieur (22, 26; 122, 126) pourvu de surfaces d'assemblage (24, 28; 124, 128), et un élément support extérieur (23, 27; 123, 127) pourvu de surfaces d'assemblage (25, 29; 125, 129); application d'un matériau de soudure haute température au niveau d'au moins une surface d'assemblage (24, 28 ou 25, 29; 124, 128 ou 125, 129); assemblage de la partie supérieure de piston (11) et de la partie inférieure de piston (12) pour former un corps de piston par réalisation d'un contact entre les surfaces d'assemblage (24, 28 ou 25, 29; 124, 128 ou 125, 129); introduction du corps de piston dans un four à vide et création du vide dans le four à vide; chauffe du corps de piston à une pression de 10-2 mbar maximum à une température de soudage de 1300 °C maximum; et refroidissement du piston soudé (1, 10) à une pression de 10-2 mbar maximum jusqu'à solidification complète du matériau de soudure haute température. L'invention concerne également un piston (10, 110) pouvant être fabriqué au moyen de ce procédé.
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