Abstract:
A diesel engine is fitted with a thin-walled wet liner fabricated of steel. The liner has a hardness that is within 10-20 Rc of the hardness of the piston rings carried on a piston within the liner. The inner surface of the liner is manufactured with a TRD=5Rvk(100-M12) of between 30 and 400µm, and a compound liner thickness to bore diameter in the range of 1.5 to 4 percent.
Abstract:
Die vorliegende Erfindung betrifft ein Verfahren zum Ein- oder Umgiessen von Zylinderlaufbuchsen zur Herstellung eines Verbundkörpers, welches umfasst die folgenden Schritte: Aufbringen einer ersten Schicht und einer zweiten Schicht auf eine Aussenoberfläche einer Zylinderlaufbuchse, wobei die erste Schicht, welche auf einer Aussenoberfläche der Zylinderlaufbuchse im Bereich eines ersten Endes der Zylinderlaufbuchse aufgebracht ist, einen höheren Schmelzpunkt als die zweite Schicht aufweist, welche auf einer Aussenoberfläche der Zylinderlaufbuchse im Bereich des zweiten Endes der Zylinderlaufbuchse aufgebracht ist, Anordnen der Zylinderlaufbuchse in einer Gussforrn, und Ein- oder Umgiessen der Zylinderlaufbuchse mit Gussmaterial, wobei die Anbindung der Zylinderlaufbuchse in Abhängigkeit von der Oberflächentemperatur des Gussmaterials über die erste Schicht und/oder die zweite Schicht erfolgt, und die Zylinderlaufbuchse derart in der Gussform angeordnet wird, dass das erste Ende dem Eingussbereich der Giessform zugewandt ist und das zweite Ende dem Eingussbereich der Giessform abgewandt ist. Darüber hinaus betrifft die Erfindung eine Zylinderlaufbuchse, die bei dem erfindungsgemässen Verfahren einsetzbar ist.
Abstract:
A cylinder for an internal combustion engine. A metallic ring (6) surrounds the top of the cylinder. An insulating ring (7) is provided at the top of the cylinder between the metallic ring and cylinder wall. The axial extent of the insulating ring (7) is less than that of the metallic ring (6) and is determined so that it diverts some of the heat away from the relatively poorly cooled zone towards the top of the cylinder, but does not significantly obstruct the heat flow to surrounding cooling channels (5).
Abstract:
An internal combustion engine (1) having a cylinder block (2) with cylinders (40) with valves (5a, 5b, 6a, 6b) arranged in the roof of the combustion chamber, and piston (4) reciprocable within a liner (19) in the cylinder. The cylinder has a smaller diameter upper portion (20) and a larger diameter lower portion (40B) with a shoulder (34) therebetween. The upper end (44) of the liner (19) abuts the shoulder (34) in the cylinder located substantially level with the upper piston ring (32). The valve seats (17) of corresponding valves (5a, 5b, 6a, 6b) protrude radially of the valve seats into the wall of the upper portion (20) of the cylinder.
Abstract:
A robust engine assembly having reduced weight and efficient cooling, without an increase in fuel consumption or carbon dioxide emissions, is provided. The engine assembly includes a double-wall cylinder liner clamped between a cylinder head and a crankcase. A manifold is disposed along a portion of the cylinder liner and includes fluid ports aligned with fluid ports of the cylinder liner to convey cooling fluid tο a cooling chamber located between the walls of the cylinder liner. For example, the manifold can be a low-loss hydraulic manifold cast integral with the crankcase. Tie rods connect die cylinder head to the crankcase to clamp the cylinder liner in position. Alternatively the tie rods can be connected to a main bearing cradle located beneath the crankcase. No attachment features extend into the walls of the cylinder liner, which is especially advantageous when the cylinder liner is formed of aluminum.
Abstract:
The present invention relates to a cylinder sleeve (10) for internal combustion engines, more concretely to a cylinder sleeve (10) inserted by casting into an engine block (8), wherein the circumferential outer surface (2) is provided with a coating (5) capable of providing adhesion between the cylinder sleeve (10) and the engine block (8), inhibiting the formation of empty spaces (4) and providing excellent heat exchange for the engine block (8). The coating (5) has the particularity of being constituted by a nickel- phosphorus (NiP) alloy with a varying melting temperature as a function of the phosphorus contents, which enable a sleeve (10) coated with such an alloy to be inserted by high pressure die cast or low pressure die cast or by gravity.
Abstract:
A cylinder liner defines a combustion chamber (6) in a cylinder of a combustion engine and has a metallic body (8) with an inner wall (7) bounding the combustion chamber, a circumferential inner recess (13) in the inner wall and a metal ring (15) which is received in the recess (13), and has a surface (16) facing the combustion chamber, adapted to protrude into the combustion chamber (6) relative to said inner wall (7) of the cylinder liner's body. The metal ring (15) is glued to the cylinder liner's body in the recess with a glue (22) which has a heat conductivity less than 50% of the heat conductivity of the material of the cylinder liner's body (8).
Abstract:
An internal combustion engine includes: a cylinder block having a block cooling water passage that supplies cooling water to a plurality of cylinder bores, and a inter-bore cooling water passage provided between cylinder bores that supplies cooling water between the cylinder bores; a cylinder head having a first cooling water passage to which cooling water is supplied from the block cooling water passage, and a second cooling water passage, which is provided independently from the first cooling water passage, and to which cooling water is supplied from the inter-bore cooling water passage; a heat exchanger; a first cooling water introducing part that leads cooling water, which is flown out from the first cooling water passage, to the heat exchanger; and a second cooling water introducing part that leads cooling water, whicli is flown out from the second cooling water passage, to a downstream side of the heat exchanger.
Abstract:
Die Erfindung betrifft eine Zylinderlaufbuchse (2) eines Zylinders einer Brennkraftmaschine, in der ein oszillierender Kolben (3) an einer Lauffläche (4) geführt ist, wobei die Zylinderlaufbuchse (2) mit einem Bund (5) zwischen einem Zylindergehäuse (1) und einem Zylinderkopf vertikal fixiert ist. Die nasse Zylinderlaufbuchse (2) umfasst eine von einer Kreisform abweichende Außenseite (6) und/oder eine rotationsasymmetrische äußere Kontur von dem Bund (5). Die Zylinderlaufbuchse (2) ist in einer korrespondierenden Aufnahme des Zylindergehäuses (1) lageorientiert eingepasst.
Abstract:
Die vorliegende Erfindung betrifft eine Zylinderlaufbuchse (10, 110) für ein Zylinderkurbelgehäuse eines Verbrennungsmotors. Erfindungsgemäß ist vorgesehen, dass die Zylinderlaufbuchse aus einem Kopfteil (11, 111) und einem Schaftteil (12, 112) besteht, die über eine Fügenaht (18, 118) fest miteinander verbunden sind. Die vorliegende Erfindung betrifft ferner ein Verfahren zur Herstellung einer solchen Zylinderlaufbuchse.