摘要:
A portable engine unit is provided. The unit comprises an engine including a clutch, a crankcase enclosing a crank shaft, an engine cylinder enclosing a piston and a piston rod, a carburetor, an air filter, a recoil starter, and a muffler; and a housing for enclosing the engine, comprising at least two portions which are assembled and disassembled along a plane includng the axis of rotation of an output shaft of the engine to enclose and expose the engine.
摘要:
Améliorations à la construction de moteurs à combustion interne à mouvements alternatifs, contribuant à faciliter l'entretien et les réparations et à éviter des problèmes dûs à des défaillances des joints de culasse. Ladite construction comprend un certain nombre de cylindres (1), un vilebrequin (2), des bielles (17) reliant le vilebrequin aux éléments (20) du piston placés en vue de leurs mouvements alternatifs dans les cylindres (1), un carter-moteur (8) servant de support au vilebrequin et destiné à recevoir les extrémités inférieures des cylindres (1) et une culasse (10) destinée à recevoir les extrémités supérieures des cylindres (1), la ligne de séparation entre la culasse (10) et le carter (8) étant située à mi-chemin le long des cylindres (1), lesquels sont constitués de chemises (6) s'étendant à la fois dans le carter moteur (8) et dans la culasse (10).
摘要:
An internal combustion engine (1) including: a cylinder block (10) in which a plurality of cylinders (12) are formed; and a cylinder head (20) formed in conjunction with the cylinder block (10) into one body to form a plurality of combustion chambers (22), wherein an upper surface (20a) of the cylinder head (20) is divided, along a direction in which the plurality of cylinders (12) are arranged, into first regions (E1) that are regions that overlap the combustion chambers (22) as viewed from an axial direction of the cylinders (12) and a second region (E2) that is a region located between two of the first regions (E1) adjacent to each other, and at least either an intake-side cam journal (56) or an exhaust-side cam journal (58) is disposed in the second region (E2).
摘要:
A water jacket (21) is divided by a partition wall (23) which has a flat plate shape, into a first water jacket portion (24) on a cylinder head side, and a second water jacket portion (25) on a cylinder block side. The partition wall (23) is connected to a connection portion between a top wall (12) of a combustion chamber (5) and an exhaust port wall (7), on one side surface side of an internal combustion engine (1), with respect to the combustion chamber (5). The partition wall (23) is connected to a portion of an upper end side of a cylinder wall (16) which constitutes a side wall of the combustion chamber (5), on the other side surface side of the internal combustion engine (1), with respect to the combustion chamber (5). The partition wall (23) is inclined so that an exhaust port side is positioned nearer to the cylinder head side than the intake port side.
摘要:
The invention relates to a fixed-head internal combustion engine comprising at least one cylinder having a cylindrical chamber arranged in a housing, an applied lining (3) inserted in the cylindrical chamber, and a supporting element attached to the housing (40) whereon the liner is supported, the engine also comprising elastic means (6) forming a spring, inserted between the liner and the supporting element attached to the housing, such that the liner is supported on said supporting element attached to the housing via the elastic means forming a spring.
摘要:
A cooling device 1A for engine includes: an engine 50A having a cylinder block 51, a cylinder head 52A and a gasket 54, the gasket 54 being provided between the cylinder block 51 and the cylinder head 52A and having a high thermal conductivity member 54a allowing heat transfer between an upper part of a cylinder 51a and the cylinder head 52A with a heat transfer rate higher than the other part, a partial W/J 521eA being provided around the high thermal conductivity member 54a; and an ECU 70A performing a control for changing flow condition of cooling medium flowing in the partial W/J 521eA, according to combustion engine operation condition.
摘要:
Um ein Motorarbeitsgerät (100) wie eine Kettensäge, ein Handschleifgerät, eine Handkreissäge, ein Rasenmäher, ein Rasentrimmer oder ein sonstiges Handwerkzeug oder Gerät zur Garten- und Landschaftspflege, aufweisend einen Verbrennungsmotor (10) mit wenigstens einem Zylinder (11) und wenigstens einem Vergaser (12), der in einem Vergaserraum (13) angeordnet ist, der durch eine Zwischenwand (14) von einem Motorraum (15) getrennt ist, wobei ein Gehäuse (16) vorgesehen ist, das den Motorraum (15) wenigstens teilweise umschließt, sodass sich ein oberer Teil (11a) des Zylinders (11) in Richtung zum Gehäuse (16) hin erstreckt, wobei ferner ein Lüfterrad vorgesehen ist, durch das Luft aus dem Motorraum (15) durch eine Warmluftöffnung (17) in der Zwischenwand (14) in den Vergaserraum (13) einbringbar ist, zu schaffen, insbesondere ein Motorarbeitsgerät mit einer Vergaservorwärmung, die eine erleichterte Bedienung ermöglicht, wird vorgeschlagen, dass die Warmluftöffnung (17) in dem Bereich der Zwischenwand (14) angeordnet ist, der angrenzend an den oberen Teil des Zylinders (11) angeordnet ist.
摘要:
A method of manufacturing a cylinder head and crankcase for a small engine. A crankcase and a cylinder head are cast to close tolerances and include as-cast mounting flanges, which are assembled in face-to-face contact by employing self-threading screws. Bearing recesses are cast into the crankcase. The cylindrical sidewalls of the bearing recesses are provided with as-cast flutes and roller bearings are press-fitted into the bearing recesses.