Abstract:
Zylinderblock aus einer Leichtmetallegierung für einen Kolbenmotor mit wenigstens einer Zylinderlaufbuchse und eingegossenen, von den Kurbelwellenlagerböcken bis zur Auflagefläche eines Zylinderkopfs reichenden Lagerstühlen aus einer gegenüber der Zylinderblocklegierung eine höhere Warmfestigkeit und Dauerfestigkeit sowie einen niedrigeren Wärmedehnungskoeffizienten aufweisenden Leichtmetallegierung, die die Zylinderkopf- und Kurbelwellenlagerschrauben oder durchgehende Zuganker aufnehmen.
Abstract:
In order to prevent a damage on a component forming a pressure feed fuel passage and to reduce a fuel injection pump in size and weight, the pressure feed fuel passage having fuel discharge passage (32), fuel chamber (33) and accommodation hole (34) formed in respective cylinder heads is formed straightly in respective cylinder heads (12, 13), and has communication port (32a) for communicating with fuel pressure chamber (30) and fuel outlet (34a) which has an opening at an outer peripheral wall of the cylinder heads (12, 13). Fuel pressurized in fuel pressure chamber (30) at the cylinder head (13) side is introduced into fuel chamber (33) of cylinder head (12) via fuel passage (42a) and fuel lines. Fuel pressurized in both fuel pressure chambers (30) is merged at fuel chamber (33) of cylinder head (12), and is supplied to a common-rail via fuel passage (41a).
Abstract:
Für eine einfache Bereitstellung einer formschlüssigen Zentrierung zwischen zwei getrennt hergestellten Lagerhälften (1, 2) von Lageranordnungen vorzugsweise in Verbrennungsmotoren wird vorgeschlagen, eine Lagerhälfte (2) mit eine Trennfläche (TF) überragenden Vorsprüngen (30) zu versehen, welche während der Montage der Lageranordnung unter Materialverdrängung in das Material der anderen Lagerhälfte (1) eingreift.
Abstract:
For a device for the breaking separation of bearing caps of aligned bearing bores in bearing systems of a part of an engine comprising a somewhat semicircular profiled separator guided and acting centrally on a bearing cap in the bearing bore, in order to achieve a simple structure, it is proposed that there be a half mandrel or full mandrel which can be axially arranged in one or more bearing bores and that an actuating rod system guiding the mandrel concerned only in the breaking separation direction engage with the mandrel concerned transversely to its longitudinal extension, whereby the mandrel concerned is held against rotation and each bearing cap is clamped against the mandrel concerned against rotation.
Abstract:
Eine Brennkraftmaschine, insbesondere ein Boxermotor, weist ein in Kurbelwellenlagermitte längsgeteiltes Zylinderkurbelgehäuse (1) sowie eine Lagerbrücke (2) auf, welche über Zylinderkopfschrauben (9,10,9a,10a) mit dem Kurbelgehäuse (1) verbunden ist. Das Zylinderkurbelgehäuse (1) weist mit der Lagerbrücke (2) eine gemeinsame vertikale Trennebene auf (a,a). Beide Lagerbrückenhälften (2a,2b) sind einerseits über Lagerstuhlschrauben (7,8) miteinander verbunden und andererseits ist die Lagerbrücke (2) über Zylinderkopfschrauben (9,10,9a,10a) zwischen den zu beiden Seiten der Lagerbrücke angeordneten Kurbelgehäusehälften unter Bildung von Ölkanälen (15,16,17) gehalten. Über die Schrauben (9,10,9a,10a) sind gleichzeitig Zylinderköpfe am Kurbelgehäuse befestigbar.
Abstract:
A cylinder block (B C ) comprising a cylinder block body (1) and a cylinder liner block (B L ) filled in the cylinder block body (1) in a cast-in manner. The cylinder liner block (B L ) is formed from a material having a rigidity larger than that of the cylinder block body (1), and the cylinder liner block (B L ) comprises a liner section (4) filled in a cylinder barrel portion (1 U ) of the cylinder block body (1) in a cast-in manner, and a reinforcing wall section filled in a bearing wall of a crank case portion (1 L ) of the cylinder block body (1) in a cast-in manner. Thus, it is possible to increase the wear resistance of cylinders in the cylinder block (B L ), as well as to provide an increase in performance by reductions in vibration and noise of the cylinder block (B L ), and to provide reductions in size, weight and cost of the cylinder block (B L ) by a reduction in thickness of the bearing walls (13).
Abstract:
Method of dimensionally stabilizing the interface between metal parts (26,27,28) of differing thermal expansion characteristics (TEC), regardless of temperature variations under normal designed use of such parts, comprising: (a) hot extruding a mixture of ceramic fibers (34) (i.e., Si₃N₄, SiC, Al₂O₃) and a powder of the metal having the higher TEC (i.e., Al, Ti, Mg) while aligning the fibers (34) generally along the direction of extrusion, to form an insert (32); (b) shaping said insert (32) to align its fibers generally in at least one direction of anticipated thermal growth that may interfere with the interface; (c) casting the insert in place within a first part (27,28) comprised of the higher TEC metal and with the insert's fibers (i) oriented as above, and (ii) preheated to a temperature no greater than 35-45% of the temperature of the molten light metal; and (d) bringing together the first metal part (27,28) with a second part (26) of lower TEC metal (i.e., Fe or steel) to form the interface. The insert (32) may be located in a mould in a manner to be totally enveloped by the molten light metal with the insert having a surface spaced a uniform, predetermined distance from the exterior of the cast light metal part, or the insert may be located to expose a surface thereof upon completion of the casting.
Abstract:
A method of modifying a conventional internal combustion engine to accept ceramic material. A cast iron extension member (20) is metallurgically joined to the cast iron engine block (10), the extension member (20) having a wall defining a bore opening (21) aligned with and larger than the bore opening (11) of the engine block (10). The extension member (20) has a height substantially equal to or greater than the axial stroke of the piston (17). The diameter of the upper portion of the wall, defining the bore opening (11) in the engine block (10), is enlarged to define an annular shoulder (23); the shoulder (23) has an outer surface (23A) substantially axially aligned with the wall defining the bore opening (11) in the extension member (20). A cylindrical ceramic liner (26), such as zirconia or alumina, is attached within the wall of the bore opening (11) of the extension member (20) by use of a high strength metallic sleeve (25) which is fitted along the outer surface of the shoulder (23). The ceramic liner (26) has an internal surface (26a) aligned with the wall of the bore opening (11) in the engine block (10). A metallic cap (30) comprised of stainless steel or cast iron is attached to the top of the piston (17 at 31), the cap (30) carrying a ceramic facing (32). The cap (30) has an effective height commensurate with the effective height of the extension member (20). The cap (30) defines a trapped air space (39) between the extension cap (30) and piston (17), and the cap (30) has its side wall aligned with the side wall of the piston (17).