Abstract:
The cooling arrangement for a reciprocating piston (2) of an internal combustion engine comprises a cooling medium injector (5, 5') for injecting cooling oil into a space (10) between the piston (2) and the cylinder liner (1) below the piston crown (2a), an opening (8) for introducing the cooling oil from the space (10) below the piston crown (2a) into a cooling oil gallery (7), and a cooling medium duct (6, 6') for supplying the cooling oil to the cooling medium injector (5, 5,). The cooling medium injector (5, 5') is arranged inside the cylinder at such a height that the tip (5a, 5a') of the injector (5, 5') is above the center axis (4a) of the gudgeon pin (4) of the piston (2) when the piston (2) is at bottom dead center.
Abstract:
A cylinder liner and piston configuration for an internal combustion engine includes features for improving the cooling of the piston. Specific ratios and dimensions are included to optimize the features of the cylinder liner and piston. Also included are unique piston features that assist in achieving some of the specified dimensions and ratios.
Abstract:
Die Erfindung betrifft eine Brennkraftmaschine (1) mit einem Zylinderkopf (2) und einem Zylinderblock (3), wobei am Zylinderblock (3) ein Kurbelgehäuse (10) befestigt ist, wobei das Kurbelgehäuse (10) zumindest eine Ölpumpe (40) aufweist. Um den Fertigungsaufwand zu verringern, ist vorgesehen, dass die Ölpumpe im Kurbelgehäuse (10) angeordnet ist, wobei die Ölpumpe (40) mit einem Flansch (43) verbunden ist, und wobei der Flansch (43) an einer Montagewand (42) des Kurbelgehäuses (10) befestigt ist.
Abstract:
To produce a steel liner (10) for a cylinder (112) of an internal combustion engine, a tubular preform (50) of steel is subjected to a flow forming procedure which transforms it into a semi-finished liner (56) having a configuration that corresponds closely to the configuration desired for the cylinder liner. The flow forming process achieves a near-net shape such that only minimal amount of subsequent machining is required to transform the semi-finished liner (56) into the final shape for the cylinder liner (10).
Abstract:
A wet-style cylinder liner (16) for a diesel engine is provided with a surface texture (28) to combat the effects of cavitation-induced erosion. The surface texture (28) can be formed as a coating (30) of manganese phosphate applied about the outer surface (26) of the cylinder liner (16) within the coolant flow passage (20) of the engine. The manganese phosphate is applied in such a manner that a crystalline structure of 2-8µm average grain size, blocky in nature, clearly faceted, with no cauliflower-like formations and a discernable channel network surrounding the crystals is formed. This crystalline structure works with the natural adhesion and surface tension effects within the liquid coolant to create a stagnant fluid layer about the outer surface (26) of the cylinder liner (16). The stagnant fluid layer functions like a self-healing armor plate. When rapid flexing of the cylinder liner (16) produces cavitation bubbles, these bubbles are held at a distance from the outer surface (26) by the stagnant fluid layer. As the bubbles implode, their kinetic energy is dissipated within the stagnant fluid layer instead of directly upon the outer surface (26) of the cylinder liner (16). The manganese phosphate coating (30) acts as a labyrinth to anchor water molecules, or the engine coolant, and thus promote formation of the stagnant fluid layer.
Abstract:
A cylinder block 3 of an engine 1 is formed by assembling an inner block member 10 and an outer block member 15. The inner block member 10 includes an upper deck portion 7 integrated with a cylinder liner portion 8. The outer block member 15 includes a cylinder outer wall portion 12. The cylinder head 2 is fastened to an upper deck portion 7 with head bolts 31. The cylinder outer wall portion 12 is fastened to the upper deck portion 7 with block fastening bolts 32 at an opposite side of the upper deck portion 7 with respect to the cylinder head 2. The head bolts 31 and the block fastening bolts 32 are threaded with the upper deck portion 7 from the opposite sides with respect to each other. As a result, deformation of the upper deck portion 7 and inclination of the cylinder liner portion 8 due to fastening of the bolts 31, 32 are reliably prevented.
Abstract:
The invention relates to a method for sealing or embedding cylinder linings for producing a composite body. Said method comprises the following steps: application of a first layer and a second layer to the external surface of a cylinder lining, the first layer, which is applied to the external surface of the lining in the vicinity of a first end of the latter, having a higher melting point than the second layer, which is applied to the cylinder lining in the vicinity of the second end of the cylinder lining; placing of the cylinder lining in a casting mould and sealing or embedding the cylinder lining with or in casting material, whereby the cylinder lining is bonded, depending on the surface temperature of the casting material, by means of the first layer and/or the second layer and the cylinder lining is placed in the casting mould in such a way that the first end faces the mouth region of the casting mould and the second end faces away from said mouth region. The invention also relates to a cylinder lining that can be used in the inventive method.
Abstract:
A cylinder liner for insert casting and a method for manufacturing the cylinder liner are provided. The cylinder liner and the method are applied to cylinder blocks and improve the adherence and the bonding strength with a cylinder block material in a favorable manner. The cylinder liner satisfies the following requirements: (i) the height of projections 1P is in a range between 0.5 mm and 1.0 mm, inclusive; (ii) the number of the projections 1P is in a range between 5 and 60, inclusive, per cm 2 on the outer circumferential surface; (iii) the area ratio of regions each encircled by a contour line of a height of 0.4 mm is in a range between 10% and 50%, inclusive; (iv) the area ratio of regions each encircled by a contour line of a height of 0.2 mm is in a range between 20% and 55%, inclusive; (v) the region each encircled by a contour line of the height of 0.4 are independent from each other; and (vi) the area of the regions each encircled by a contour line of the height of 0.4 mm is in a range between 0.2 mm 2 and 3.0 mm 2 , inclusive.
Abstract:
The invention relates to a gas seal between a coolant jacketed cylinder liner (12) and a cylinder head (11) in an internal combustion engine functioning with high combustion pressures. The cylinder head has a circular groove (17), which is designed to receive an end section (18) of the cylinder liner, and a bearing surface (19) situated radially inside the groove (17) for interacting with a corresponding bearing surface (20) on the cylinder liner. The end section (18) of the liner is provided with a surface (21), which in the position of use diverges axially towards the cylinder head (11). This surface is intended to interact with a corresponding surface (22) on a sealing ring (23) converging in said direction, in order to form a radial seal inside the groove (17).