Abstract:
An outboard motor includes an engine, a flywheel magnet generator, a fan, and a cover member. The engine includes a crankshaft extending in a vertical direction. The flywheel magnet generator includes a flywheel rotor, a core, and a coil. The flywheel rotor is attached to an end of the crankshaft. The core and the coil are disposed between the flywheel rotor and the engine. The fan is attached onto the flywheel rotor. The cover member is disposed above the fan. The cover member includes a first suction port that sucks in air from above the cover member. The flywheel rotor includes a second suction port that sucks in air from below the flywheel rotor. The fan includes a first ventilation path and a second ventilation path. The first ventilation path radially outwardly releases the air sucked in through the first suction port, whereas the second ventilation path radially outwardly releases the air sucked in through the second suction port.
Abstract:
A reciprocating device which may be operated either as a compressor or an engine. Each cylinder has a reciprocating piston connected to a piston rod. Dual cylinder chambers are located in each cylinder on opposite sides of the piston. The pistons are connected to a scotch yoke which translates the reciprocating motion of the pistons to rotary motion at a shaft in the engine mode. In the compressor mode, the shaft is connected to a power source. The engine components such as the pistons, rods, bushings and cylinder lines may be high quality steel or a ceramic.
Abstract:
Self-cooled engine including a cylinder, a cylinder head and a turbo-piston which freely reciprocates inside the cylinder. The cylinder head has a valve that achieves circumferential suction of air-fuel mixture into the cylinder. The valve mechanism is closed and opened by cylindrical cam by means of cam shaft. Circumferential suction of air-fuel mixture enables the cylinder to cool itself and to burn the fuel at the energy center effectively. The force of incoming stream of air-fuel mixture rotates the impeller on the piston which acts as a fan to cool the cylinder walls. The impeller blades deflect the flame from reaching the cylinder walls and acts as a thermal barrier between the energy center and cylinder walls. The high intensity compression swirl (HICS) created at the end of the compression stroke to ensure that the fuel combustion is efficient and instantaneous release of maximum energy.
Abstract:
The invention discloses an air-cooling cylinder head of a gasoline engine and a gasoline engine. The air-cooling cylinder head of a gasoline engine comprises a cylinder head main body (1), and an intake passage (3), an exhaust passage (2) and a spark plug mounting hole (6) arranged in the cylinder head main body (1), a plurality of cooling fins (4) is arranged on the outer surface of the cylinder head main body (1), a combustion chamber surface (5) is formed on the inner side of the cylinder head main body (1), a longitudinally through air-cooling passage I (8) is arranged on the same side of the cylinder head main body (1) as the intake passage (3) and the exhaust passage (2), a transversally through air-cooling passage II (7) is arranged between the intake passage (3) and the exhaust passage (2), and both the longitudinally through air-cooling passage I (8) and the transversally through air-cooling passage II (7) are kept away from function holes on the cylinder head main body (1). In the technical solution of the invention, cooling air flows through the outer surface of the combustion chamber wall from different directions to sufficiently decrease the temperature of the combustion chamber, so that the cylinder head has excellent cooling efficiency, and the power of the gasoline engine is increased.
Abstract:
A cooling device is incorporated into a V-type engine E in which a front cylinder and a rear cylinder are arranged in V-shape and a rear exhaust pipe is placed at a right side of a vehicle body. The cooling device 1 includes an intake duct and a fan. The intake duct has a suction port which opens toward the rear exhaust pipe. The fan suctions the air into the interior of the intake duct through the suction port and exhausts the suctioned air to a location distant from the exhaust pipe.
Abstract:
An internal combustion engine includes a deactivatable cylinder group, a constantly operating cylinder group, a first water passage, a second water passage, an upstream integrated water passage, a downstream integrated water passage, a connecting passage, a third water passage, and a device. The downstream integrated water passage includes a junction and an upstream end. The upstream end is closer to the second water passage than to the first water passage in the downstream integrated water passage. The third water passage connects the connecting passage and a portion provided between the junction and the upstream end in the downstream integrated water passage. The device is provided adjacent to at least a part of the third water passage to exchange heat with water flowing in the third water passage.
Abstract:
The cooling effect of an engine is improved. An engine, which rotationally drives a saw chain serving as a rotating tool, is provided with a crankcase, in which a crankshaft is rotatably built, and a cylinder, in which a piston coupled to the crankshaft via a connecting rod is reciprocatably built. Atop part of the cylinder is covered with a cylinder cover, and a cooling wind toward the cylinder is generated by a cooling fan attached to a projecting end of the crankshaft. The cooling wind is guided by heat-dissipating plates extending along the crankshaft. Exposing parts bulged to outside than a lateral side of the cylinder cover are provided to tips of the heat-dissipating plates.
Abstract:
An engine for rotating a saw chain serving as a rotating tool includes an engine main body including a crank case and cylinder. A cooling fan for generating forced cooling air is attached to a protruding end of a crank shaft. An engine cover for covering a top of the cylinder is provided in the engine, and an air guiding rib extending in a direction of crossing the cooling air is provided in an inner circumferential surface of the engine cover. In the engine cover, opening portions for exhausting the cooling air outside are provided.
Abstract:
A forced air-cooled engine includes a crankcase, a cylinder block, a cylinder head, a cooling fan, and a shroud arranged to cover a portion of the crankcase, the cooling fan, and a portion of the cylinder block and a portion of the cylinder head. Fins are provided at least in a region of the cylinder block covered by the shroud. The shroud includes a facing wall portion that faces the fins . An exhaust opening is provided between the facing wall portion and the cylinder block, and opens away from the cooling fan.
Abstract:
The invention relates to a portable, hand-held work apparatus such as a chain saw, a cut-off machine, a brush cutter or the like with an air cooled combustion engine. A cooling air blower (4) which includes a cooling air spiral (6) and a fan wheel (5), moves a cooling air flow (13) for cooling the combustion engine. Further a combustion air channel (30) leads from the cooling air blower (4) to the combustion engine (2) and branches off from an air output window (20) provided in the base (14) of the cooling air spiral (6). The diverting device (21) includes a guide wall (22) which extends into the cooling air spiral (6) between the fan wheel (5) and the air output window (20). In order to divert a large volume of combustion air (19) with minimal disruption to the cooling air flow, the pass-through cross-section of the air output window (20) tapers in the direction of the diverted combustion air (19) from a first pass-through area (29) to a second pass-through area (31).