Abstract:
A cylinder liner (1) for an internal combustion engine has a piston (5) which is movable in the liner in the longitudinal direction between a bottom dead centre at which scavenging air ports (8) in the wall of the cylinder liner are exposed above the top surface of the piston (9), and a top dead centre at which the piston is in its top position in the cylinder liner. The piston is provided with several piston rings (19, 21-23), the outer surfaces of which slide along the inner surface (13) of the liner. The cylinder liner is provided with several recesses (25) in its inner suface, said recesses being positioned opposite the top piston ring when the piston is at the top dead centre. In the longitudinal direction the extent of the individual recesses (25-27) is at least twice the height of the top piston ring (19). The recesses serve as gas flow connections between the spaces above and below the piston ring when it is positioned opposite the recesses.
Abstract:
The gap (4) between the cylinder liners (1) and a crankcase (2) of an internal combustion engine is elastically bridged at least in sections by an elastomer (6) in the form of an intermediate liner with grooves (8) and ridges (7). This intermediate liner compensates for different rates of heat expansion, seals off a water jacket (5) and evens out tolerances and damps vibration.
Abstract:
In accordance with a cooling method of a cylinder liner of an engine of the present invention, an insulating layer (5) consisting of a toroidal groove (1c) is formed near the upper part of a cylinder liner (2) disposed inside a cylinder block (1) in such a manner as to gently encompass the upper part of the cylinder liner so that the wall temperature of the upper part of the cylinder liner (2) is raised positively. A water jacket (4) having a progressively decreasing sectional area from the lower part to the center of the cylinder liner (2) is formed in a cylinder block at the portion below the center of the cylinder liner (2), and cooling water is caused to flow from below to above inside the water jacket (4).
Abstract:
A cylinder liner assembly for inclusion in the cylinder bore (104) of an internal combustion engine (100) includes a sleeve-like cylinder liner (120) and an anti-polishing cuff (170) to scrape combustion deposits from a piston (106) reciprocally movable along an axis line (108) of the cylinder liner (120). A fire dam (160) may axially protrude from a first liner end (124) of the cylinder liner (120) and may have an obliquely angled chamfer (164) disposed therein circumscribing the axis line (108). To locate the anti-polishing ring (170) proximate to the top land of the piston (106) when at the top dead center position, the anti-polishing ring (170) can include a cuff head (182) disposed at the first cuff end (174) that is generally triangular and has an angled undercut (182) corresponding to the obliquely angled chamfer (164). When mated, the chamfer (164) and angled undercut (182) abut against each other.
Abstract:
A cylinder liner (300) is provided that can prevent a band seal (318) from being damaged during installation. The cylinder liner (300) includes a pilot portion (310) having a larger outer diameter (320) than an outer diameter (326) of the band seal (318). The pilot portion (310) contacts an insert (312) and a seal (314) positioned on a recess (316) of the engine block (330) so that the cylinder liner (300) lateral movement during operation of the engine block (330) is prevented. In order to accommodate a larger outer diameter (320) of the pilot portion (310), the inner diameters of the seal (314) and insert (312) can be correspondingly increased through a machining process. The machining process also creates uniform inner diameters of the seal (314) and insert (312).
Abstract:
The present invention relates to a component of an internal combustion engine, and in particular a cylinder liner (10) of the wet type provided with a circumferential outer surface (12) which receives application of a first layer (1) containing silicon, on which there is applied a second elastomer layer (2) containing nanoparticles of silicon oxide, such as to increase the durability of the liner (10) when it is working against the action of erosion by cavitation.
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:
An improved cooling fluid passage configuration provides for uniformity of cooling about the entire periphery of a cylinder liner of an internal combustion engine in addition to improved cooling by increasing the flow in an upper water jacket of a split water jacket design. The cooling fluid passage configuration also provides a reduced pressure drop between a cylinder liner cooling fluid inlet and a cylinder head cooling fluid outlet when compared to conventional designs with a single head feed line, permitting use of a smaller cooling fluid pump and leading to increased efficiency of the engine.