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1. WO2019048190 - PISTON

Publication Number WO/2019/048190
Publication Date 14.03.2019
International Application No. PCT/EP2018/071929
International Filing Date 13.08.2018
IPC
F16J 9/00 2006.01
FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
16ENGINEERING ELEMENTS OR UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
JPISTONS; CYLINDERS; PRESSURE VESSELS IN GENERAL; SEALINGS
9Piston-rings, seats therefor; Ring sealings of similar construction in general
CPC
F02F 3/22
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
16having cooling means
20the means being a fluid flowing through or along piston
22the fluid being liquid
F02F 5/00
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
5Piston rings, e.g. associated with piston crown
F02M 69/042
FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
02COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
MSUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
69Low-pressure fuel-injection apparatus ; ; Apparatus with both continuous and intermittent injection; Apparatus injecting different types of fuel
04Injectors peculiar thereto
042Positioning of injectors with respect to engine, e.g. in the air intake conduit
F16J 1/00
FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
JPISTONS
1Pistons; Trunk pistons; Plungers
F16J 9/00
FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
JPISTONS
9Piston-rings ; , e.g. non-metallic piston-rings; , seats therefor; Ring sealings of similar construction
F16J 9/22
FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
JPISTONS
9Piston-rings ; , e.g. non-metallic piston-rings; , seats therefor; Ring sealings of similar construction
12Details
22Rings for preventing wear of grooves or like seatings
Applicants
  • MAHLE INTERNATIONAL GMBH [DE]/[DE]
Inventors
  • RÖSCH, Hannes
Agents
  • BRP RENAUD UND PARTNER MBB
Priority Data
10 2017 215 834.407.09.2017DE
Publication Language German (DE)
Filing Language German (DE)
Designated States
Title
(DE) KOLBEN
(EN) PISTON
(FR) PISTON
Abstract
(DE)
Die vorliegende Erfindung betrifft einen Kolben (1) für eine Brennkraftmaschine (10) mit einem Kolbenkopf (2) und einem Kolbenschaft (3), wobei der Kolbenkopf (2) eine umlaufende Ringpartie (4) sowie im Bereich der Ringpartie (4) zumindest eine Ringnut (5) zur Aufnahme eines Kolbenrings (6) aufweist, die zwei Nutflanken (7,7') und einen Nutgrund (8) besitzt und wobei jede Nutflanke (7,7') über einen zugehörigen Übergang (9,9') in die Nutflanke (8) übergeht. Erfindungswesentlich ist dabei; - dass zumindest ein Übergang (9,9') unter einem Winkel α von 35° < α < 50° in die zugehörige Nutflanke (7,7') übergeht; - dass der zumindest eine Übergang (9,9') einen Radius r2 aufweist und unter diesem Radius r2, insbesondere tangential, in den Nutgrund (8) übergeht.
(EN)
The present invention relates to a piston (1) for an internal combustion engine (10) having a piston head (2) and a piston skirt (3), wherein the piston head (2) has a circumferential annular part (4) and, in the region of the annular part (4), at least one annular groove (5) for receiving a piston ring (6), which annular groove (5) has two groove flanks (7,7') and a groove base (8), and wherein each groove flank (7, 7') merges via an associated transition (9, 9') into the groove flank (8). It is essential to the invention here: - that at least one transition (9, 9') merges at an angle α of 35° < α < 50° into the associated groove flank (7, 7'); - that the at least one transition (9, 9') has a radius r2 and merges at said radius r2 into the associated groove base (8), in particular tangentially.
(FR)
La présente invention concerne un piston (1) pour un moteur à combustion interne (10), comprenant une tête de piston (2) et une tige de piston (3). La tête de piston (2) possède une partie annulaire (4) circonférentielle ainsi qu'au moins une rainure annulaire (5) dans la zone de la partie annulaire (4) servant à accueillir un segment de piston (6), laquelle comporte deux flancs de rainure (7, 7') et un fond de rainure (8) et chaque flanc de rainure (7 ,7') se fondant dans le fond de rainure (8) par le biais d'une transition (9, 9') associée. L'invention est caractérisée en ce qu'au moins une transition (9, 9') se fond dans le flanc de rainure (7, 7') associé sous un angle α tel que 35° < α < 50° ; en ce qu'au moins une transition (9, 9') présente un rayon r2 et se fond dans le fond de rainure (8) avec ce rayon r2, notamment de manière tangentielle.
Also published as
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