Abstract:
Die vorliegende Erfindung betrifft einen Einsatz (10, 110) für eine Zylinderlaufbuchse (20, 120, 220) oder einem Zylinder (222) eines Verbrennungsmotors (30, 130, 230) zur Verengung des Durchmessers der Zylinderlaufbuchse (20, 120, 220) oder des Zylinders im Bereich (21, 221) der oberen Totpunktlage eines in der Zylinderlaufbuchse (20, 120, 220) oder Zylinder geführten Kolbens (33, 233). Erfindungsgemäß ist vorgesehen, dass der Einsatz (10, 110) als offener, vorgespannter Ring mit einem Ringstoß (11, 111) ausgebildet ist, der radial durch seine nach außen wirkenden Radialkräften und axial durch eine Ausnehmung (121; 221) in der Zylinderlaufbuchse (20, 120, 220) oder Zylinder (222) derart gehalten ist, dass die radiale Flächenpressung umfangsseitig annähernd gleich ist, wobei dessen Verhältnis von Ringwanddicke (d) zu Innendurchmesser (D) der Zylinderlaufbuchse oder des Zylinders zwischen 0,001 und 0,02 beträgt.
Abstract:
A liner outer surface is coated by a sprayed layer or a heterogeneous metal layer including a base metal phase and dispersed metal phases. During casting, liquid metal enters the sprayed layer from the dispersed metal phases and solidifies in a virtual vegetation root state. The surface of the cylinder block is thus rigidly fixed to the surface of the cylinder liner. In this case, a strong bonding force is produced between the cylinder block and the cylinder liner and high thermal conductivity is obtained compared to the prior art in which the liquid metal merely contacts a surface layer.
Abstract:
Ein Zweitaktmotor, insbesondere für Modelle von Land-, Wasser- oder Luftfahrzeugen, umfasst einen in einer Laufbuchse (10) auf- und abwärts bewegbaren Kolben, der nach oben hin einen Verbrennungsraum begrenzt und nach unten hin über einen Pleuel mit einer Kurbelwelle verbunden ist, die in einem unterhalb der Laufbuchse (10) angeordneten Kurbelgehäuse drehbar gelagert ist. Bei einem solchen Zweitaktmotor wird eine verminderte Reibung des Kolbens in der Laufbuchse dadurch erreicht, das die Laufbuchse (10) am unteren, dem Kurbelgehäuse benachbarten Ende Mittel (15, 16) aufweist, welche die thermisch bedingte radiale Ausdehnung der Laufbuchse (10) verstärken.
Abstract:
An inner block member and an outer block member are separately formed from one another and assembled with one another to define a water jacket therebetween. The inner block member has a cylinder bore defined therein for a reciprocating motion of a piston. At least one elastic member is supported between the inner block member and the outer block member to absorb vibration generated between the inner and outer block members.
Abstract:
A cylinder liner for an internal combustion engine provides a method of replacement of spent cylinder liners, wherein the cylinder liner comprises a generally cylindrical body having a flange extending radially outwardly defining a shoulder. The shoulder provides a positive stop in an axial direction against a surface within a cylinder block of the engine. The body has an engagement portion adjacent the shoulder. The engagement portion is necked down from the flange and has lower and upper portions providing an interference fit within the cylinder block that inhibits fluid flow between the lower and upper portions and the cylinder block. The lower and upper portions of the engagement portion are separated from one another by a channel that extends substantially about the circumference of the body.
Abstract:
A ferrous cylinder liner (14) for use in diesel engines (10) having exhaust gas recirculation (EGR) is protected from corrosive attack from the EGR environment by first final machining the inner running surface of the liner (14) and thereafter plating the finished inner surface with a thin, non-porous, continuous coating of chromium which serves as a barrier to the EGR gases. The liner (14) is installed and used in its as coated condition with no post-coating finishing of the coated surface.
Abstract:
The counterbored joint (16) utilizes a flexible shim (36) that is larger than the body receiving bore (18). It has been found that over time that a joint (16) becomes damaged due to the high loading and vibration loads in which it encounters during operation. An undercut (52) is machined into the body receiving bore (18) which allows for the flexible shim (36) to be placed within the body receiving bore (18) between the first and second step surfaces (32, 42). The first step surface (32) is parallel to the second step surface (42) which distributes stresses uniformly and helps in sealing. The principal use is for remanufacture of a cylinder liner joint (16), however any joint that is highly loaded or encounters vibrational loads will benefit from this invention. For example, a hydraulic joint that utilizes a piston in operation may be remanufactured with this invention.
Abstract:
A sealing device placed between a cylinder head (1) and a cylinder (2) and composed of a thin detachable cylindrical lining (7) fitted in a bore formed in a block (4), comprises a raised portion (h) before the cylinder head is adjusted and while it is resting on top of the lining, said raised portion being located between the cylinder head and the block and designed to prevent any of the materials forming the cylinder head, the block or the axially compressed lining from reaching their deformational yield limits when the cylinder head (1) is adjusted with a pressure which is greater, allowing for the thickness (e) of the lining, than the maximum force exerted on the cylinder head (1) by gaseous fluid pressure, and sufficiently large to maintain contact between the cylinder head (1) and the lining (7) at all times during the operation of the machine.
Abstract:
Die Erfindung betrifft Brennkraftmaschine mit einem Zylinderkurbelgehäuse (1) mit zumindest zwei nebeneinander angeordneten Zylindern (2), mit jeweils einer nassen Zylinderlaufbuchse (3), welche von einer Stützstruktur (4) aufgenommen ist, wobei zwischen der Stützstruktur (4) und der Zylinderlaufbuchse (3) ein Kühlmittelmantel (5) angeordnet ist, mit einem eine Zylinderkopfdichtfläche (6) ausbildenden geschlossenen Oberdeck (7), wobei im Bereich einer Motorquerebene (8) zwischen zwei Zylindern (2) zumindest eine erste Schraubenaufnahme (9) für eine Zylinderkopfschraube (28) angeordnet ist. Um eine optimale Kühlung ohne Dichtheitsproblemen zu ermöglichen ist vorgesehen, dass die erste Schraubenaufnahme (9) vom Oberdeck (7) beabstandet ist, wobei die Stützstruktur (4), das Oberdeck (7) und ein die erste Schraubenaufnahme (9) und die Stützstruktur (4) verbindendes Zwischendeck (19) einen vom Kühlmittelmantel (5) getrennten Zwischenraum (27) zwischen jeweils zwei Zylindern (2) aufspannen, welcher von den Zylinderkopfschrauben (28) durchsetzt ist.
Abstract:
Various embodiments of the invention relate to an apparatus and method for assembling a cylinder for an internal combustion engine. The cylinder includes a cylinder liner with a liner wall having an outer diameter and a flange extending radially outward from the liner wall at a superior end of the liner wall. The flange includes a fillet region adjacent to the liner wall having an inferior surface. The inferior surface has a contour defined at least partially by a non-circular profile. The contour defines a minimum diameter that is greater than or equal to an outer diameter of the liner wall. The non-circular profile is optionally defined by a slanted ellipse.