Abstract: A saddle-ride vehicle includes an engine with a front cylinder extended forward and diagonally upward from a crankcase. The engine is mounted between a front wheel and a rear wheel. A space gradually vertically extended forward is provided between a fuel tank arranged on the upside of the front cylinder and a front head cover provided to an upper part of the front cylinder. A radiator upstream water passage extended backward from an upper part of a radiator is provided in front of the front cylinder and is arranged in the space. The radiator upstream water passage is covered with a front overhead cover attached to the front cylinder. With this configuration, vehicle body components are not exposed, thereby protecting the vehicle body components. In addition, the appearance of the vehicle is efficiently enhanced.

Abstract: A chain saw includes a body in which an engine for driving a saw chain is laterally housed; a top handle provided above the body; and a muffler arranged below the engine, in which an exhaust outlet for discharging exhaust from the front side of the body to the outside opens forward from the front side of the body. Accordingly, not only the exhaust can be discharged forward from the front side of the body, but also the exhaust sound can be propagated forward so that less exhaust sound is heard by the operator, thereby improving the work environment.

Abstract: A general-purpose liquid-cooled engine delivers a coolant cooling an engine body to a radiator and delivers a cooling air to the radiator by use of a cooling fan to cool the coolant. A cover structure of the general-purpose liquid-cooled engine covers the engine body and the radiator. An engine cover is configured so as to allow the cooling air to be delivered to the radiator. A muffler cover covers a muffler disposed adjacent to an external surface of the engine cover. An exterior cover covers an entire engine including the engine cover and the muffler cover.

Abstract: A two-plane type crankshaft is provided. The weight of crank webs for the respective cylinders is divided between left and right half webs and balance ratios kL and kR of the half webs for the respective cylinders are set so as to be (kL?0.25)·(0.25?kR)?DR/DL to form a track of a vector of a primary inertial couple into a substantial circle. A primary balancer offsets the primary inertia couple.

Abstract: An air-cooled engine (10) is cooled by cooling air (Wi). The air-cooled engine (10) includes a cylinder block (33) and a cylinder head (28). The cylinder block (33) has cylinder cooling through-ducts (101, 102) capable of transmitting cooling air (Wi), on the periphery of a cylinder (26). The cylinder head (28) has a head-cooling through-duct (104) capable of transmitting cooling air (Wi). The cylinder-cooling ducts (101, 102) and the head-cooling duct (104) extend in a direction perpendicular to the axial line (109) of the cylinder (26), and are communicated with each other by means of communication channels (105, 105).

Abstract: A superplastically formed structural assembly is provided, as is an associated preform and method for forming such an assembly. The assembly includes a skin member and a support member that are joined to define a space between the members and between the joints. The assembly can be produced by joining the members in a flat configuration, and then forming the resulting preform to a predetermined shape of the structural assembly. The support member defines at least one aperture in communication with the space between the members. Thus, the skin member can be formed by delivering a pressurized fluid through the support member to the skin member, e.g., to superplastically form the skin member against a die that defines a contour surface corresponding in shape to the predetermined configuration of the assembly. The support member can extend in a substantially direct configuration between opposing portions of the skin member.

Abstract: A heat extractor for attachment to an air-cooled engine. A cooling fan extends from the engine and is rotated by action of the engine. The heat extractor comprises a first thermally conductive surface for attachment to the engine, a plurality of flaps extending from the first surface, wherein when the heat extractor is attached to the engine the flaps extend away from the engine, a flared end region formed in the first surface, the flared end region nearest the cooling fan when the heat extractor is attached to the engine and wherein rotation of the cooling fan causes air to be drawn across the first surface, the plurality of flaps and the flared end region.

Abstract: A fluid dynamic section provides one or more fixed size escapelets through a foil body to reduce the induced and interference drag caused by trailing vortices and similar wake turbulence. The escapelets, which can be provided in both aerodynamic and hydrodynamic structures, such as wings, tail sections; rotary blades, guy wire frames, wing sails, and various underwater keels and wing keels. The escapelets transfer energy from an inlet located in the high-pressure surface of the foil or foil body to an outlet located in the lower-pressure surface, allowing energy that would normally form a vortex at the tip of the foil to be redirected and dissipated in a beneficial way. As a result, drag is reduced and fuel economy is increased, while at the same time increasing the authority of ailerons and similar flight control surfaces, allowing aircraft that were not previously spin recovery rated to become spin recoverable.

Abstract: The present teachings generally include a motorcycle having an engine with at least two cylinders. A first cylinder head has a first top portion and a first side portion. A second cylinder head has a second top portion and a second side portion. The first cylinder head and the second cylinder head are associated with the engine. A frame member defines an integral air box that communicates air into the engine. The frame member couples to the first side portion of the first cylinder head and the second side portion of the second cylinder head.

Abstract: Electrical units are effectively cooled, even if the longitudinal length of the cover member in which the electrical units to be cooled are accommodated is short, by easily guiding a flow of air during operation toward the electrical units. A second cover member which constitutes at least a part of a body cover together with a first cover member is positioned ahead of the first cover member which accommodates an electrical unit to be cooled. Inlets which let a flow of air during operation into the second cover member are disposed in the second cover member. An outlet for discharging a flow of air during operation out of the first cover member is provided in the first cover member.

Abstract: An outboard motor has an engine, an engine cover forming an engine compartment for holding the engine therein, a ventilation system with an outer outlet ventilation space through which air in the engine compartment flows to the outside of the engine compartment, and a generator. The ventilation system includes a case disposed in the engine compartment and forming an air discharge passage leading to the outer outlet ventilation space. A fan is placed in the air discharge passage to deliver air by pressure from the engine compartment to the outer outlet ventilation space. The air discharge passage has an inlet ventilation passage formed in an upper space in the engine compartment and opening upward. The engine compartment holding the engine therein can be efficiently ventilated, and ventilation air can effectively cool the engine and can effectively suppress temperature rise in the engine compartment.

Abstract: There is provided a refuse-trapping cover for a portable working machine, which is capable of reducing the deterioration of the engine-cooling performance of the cooling fan that may be caused by the fibrous sawdust of a palm tree. The refuse-trapping cover includes a frame (40) having a plurality of open windows (40a-40j) and attached to the outer casing (20) of a chain saw (1) to thereby cover the air inlet slits (22), and a mesh member (50) integrally fixed to the frame (40) to thereby cover open windows (40a-40j). The frame (40) is constructed to have predetermined dimension and configuration, and the mesh member (50) is fixed to a predetermined location of the frame (40) to thereby provide a sufficient space (S) between the mesh member (50) and the outer casing (20) to avoid the mesh member (50) from being adsorbed onto the outer casing (20).

Abstract: The purpose of the present invention is to improve cooling efficiency of a cylinder head of an air-cooled engine. With regard to the construction that a cooling fan is provided at one of ends of a crankshaft, and cooling air from the cooling fan is guided to a cylinder head 4 so as to cool the cylinder head 4, an intake manifold 8 is arranged above the cooling fan, a duct 51 is provided at the lateral center of the intake manifold 8 so as to suck air from an air cleaner, cooling air is sent from both sides of the duct 51 to an intake valve, an exhaust valve and an injection nozzle arranged in the cylinder head 4, and a shielding plate 55 is provided at one of lateral sides of the duct 51.

Abstract: A muffler includes a muffler body disposed on a lower portion of an engine and a passage that extends upward from the muffler body and is opened in an upper front portion of a chain saw body. Thus, exhaust gas can be discharged forward from the chain saw body, so that exhaust sounds can be dispersed forward. Consequently, the exhaust sounds propagated to an operator can be reduced and therefore a work environment can be improved. Also, since exhaust gas is discharged after the exhaust gas passes through a long passage extending upward from the muffler body, the exhaust gas can be cooled down. Accordingly, in the chain saw body typically covered with a synthetic-resin case in which exhaust outlets are formed on positions corresponding to outlets of the passage, peripheries of the exhaust outlets can be prevented from being discolored by heat of exhaust gas.

Abstract: A cooling fan includes: a hub; a plurality of cooling vanes provided along an outer circumference of the hub; and an annular connector for connecting the cooling vanes. The hub is provided with a through hole that axially penetrates the hub. A first cover on a case for covering an outward side of the cooling fan is provided with a first outer-air intake. A second cover for partitioning between the cooling fan and a crankcase and for covering an inward side of the cooling fan is provided with a second outer-air intake. With this arrangement, even when one outer-air intake (for instance, the first outer-air intake) adjacent to where the cooling vanes are provided is clogged by a large amount of dust generated during operations, the cooling vanes can breathe from the non-clogged other outer-air intake (for instance, the second outer-air intake) through the through hole, thereby restraining reduction in air flow.

Abstract: An arrangement for cleaning of intake air for an air-cooled internal combustion engine of a motor-driven tool, such as a chain saw. The arrangement includes an air conductor surrounding a fan wheel arranged to propel intake air around an axis of the fan wheel. An inner wall of the air conductor is arranged for guiding air propelled by the fan wheel. An air nozzle for cleaning of intake air is arranged on the inner wall of the air conductor radially close to said fan wheel. The air nozzle serves as a passage way for providing cleaned intake air from the fan wheel to the engine of the motor-driven tool, wherein the air nozzle and the air conductor are manufactured in one piece.

Abstract: An air-cooled general-purpose engine includes: a cooling fan fixed to one end portion, protruding outward from one end wall of an engine main body, of a crankshaft; and a shroud which is mounted to the engine main body, and which defines a cooling-air path between the shroud and the one end wall, the cooling-air path guiding a cooling air blown under pressure from the cooling fan. The air-cooled general-purpose engine includes: an oil pump which pumps up an oil from an oil reservoir; and an oil-supply path which is formed in the one end wall, facing the cooling-air path, of the engine main body, and configured to guide the oil discharged from the oil pump to a valve operating chamber in a head portion of the engine main body, and a jet for jetting the oil is provided in an opening of the oil-supply path, the opening being open to the valve operating chamber.

Abstract: A blower housing for use with an engine. The blower housing is adapted to receive a stream of intake air, and the engine includes at least one cylinder. The blower housing includes an intake opening, an air filter housed within a filter compartment, and an air flow duct adjacent to the filter compartment. The air flow duct is configured to direct air to the at least one cylinder. The air flow duct includes a first surface and a second surface, the first surface being angled with respect to the second surface to deflect the air passing through the duct away from the first surface toward the second surface. The first surface separates the air into a first portion and a second portion having deflected particulate matter therein. The duct also has an aperture that allows air to flow from the duct to the air filter, and an exhaust window.

Abstract: A gas powered internal combustion engine in which the gas is provided from pressurized liquid gas in an LPG container and in which the LPG container is rigidly mounted adjacent to the internal combustion engine at a preselected angle to be in conductive heat transfer relationship to the internal combustion engine and in vibration receiving relationship to the internal combustion engine whereby the liquified gas in the LPG container is heated and the effective surface area thereof is increased.

Abstract: A portable engine, comprising an engine casing, an air deflector cover, a fan and an exhaust pipe; a left upper baffle plate and a right upper baffle plate at the upper part of the engine constitute two left and right upper air ducts together with a cylinder head cover and the engine casing; a left lower baffle plate and a right lower baffle plate at the lower part of the engine constitute two left and right lower air ducts together with the engine casing; and a base plate of the engine and the engine casing constitute a bottom air duct. The portable engine can specifically cool each part through controlling air intake of each air duct, thus attaining better cooling effect for the engine.

Abstract: A soundproof type engine generator has a first external air inlet and a second external air inlet formed on a soundproof case K. A first cooling passage guides external air drawn in through the first external air inlet through a duct to a first fan, then from the first fan to a generator and discharges the air out of the soundproof case K. A second cooling passage guides external air drawn in through the second external air inlet to an engine using a second fan and then discharges the air out of the soundproof case The first fan is made up of a disk-like planar part, a plurality of first blades and a plurality of second blades, respectively provided radially on both head and tail sides of the planar part. External air drawn with the plurality of first blades through the first external air inlet is guided through the duct to the generator, and discharged out of the soundproof case. Air in the soundproof case is discharged with the plurality of second blades out of the soundproof case.

Abstract: An engine generator can have an engine duct for releasing to the outside a cooling air which is used to cool an engine and a muffler, and a generator duct for releasing to the outside a cooling air which is used to cool a generator. The engine duct and the generator duct can be formed in one body as an exhaust duct. The muffler and the generator can be laterally aligned in parallel with each other, and the engine duct and the generator duct can be located in a manner such that the directions of release of the cooling winds from the engine duct and the generator duct are parallel to each other. The exhaust duct can be located with the generator duct secured to a crankcase. An opening of the engine duct, and an opening of the generator duct can be laterally aligned with each other, and the opening of the generator duct can be positioned above the generator.

Abstract: An air-cooled V-shaped engine comprises a throttle body (10) and a flow-dividing plate (9) arranged ahead of a central cooling-air passage (8). The flow-dividing plate (9) is provided in a fan case (5) at a position forwardly of the throttle body (10) and has a bottom-plate portion (14) disposed at a position lower than the throttle body (10). The flow-dividing plate (9) divides the cooling air generated by an air-blowing fan (7) toward left and right sides of the central cooling-air passage (8). In this air-cooled V-shaped engine, the fan case (5) has a ceiling wall a central portion (11) of which is positioned just above the bottom-plate portion (14) of the flow-dividing plate (9). The central portion (11) of the ceiling wall of the flow-dividing plate (9) is provided at a position higher than the throttle body (10) as well as the central side portions (12), (12) of the ceiling wall, led out of the central portion (11) in a left and right directions.

Abstract: A manually guided brushcutter or other trimmer having a guide tube that accommodates a transmission shaft, with a drive motor that drives the transmission shaft and a housing that secures the drive motor to the guide tube. The housing is embodied as a closed engine housing that surrounds the drive motor. The drive motor and the closed engine housing are interconnected at two spaced-apart securement points.

Abstract: An engine-driven work machine is provided in which an engine/work machine unit (5) is housed in a box (30) and a cooling fan (15) for generating a flow of cooling air from an air inlet (39) to an air outlet (40) via the surroundings of the engine/work machine unit (5) is disposed within the box (30), wherein a gas/liquid separation chamber (32) for restricting the flow of cooling air is provided between the air inlet (39) and the engine/work machine unit (5), and the gas/liquid separation chamber (32) is provided with a first wall face (32a1) for changing upward flow of cooling air into a lateral direction after it has collided with the first wall face (32a1) and a second wall face (32a2) for changing the lateral direction of flow into an obliquely downward direction. This enables mist contained in cooling air taken into the box to be separated and removed effectively before the cooling air reaches the surroundings of the engine/generator unit.

Abstract: The aft stiffening frame of an air intake structure for an aircraft engine nacelle is made with an inflection area such that the part between the inflection area and one of its ends could be subjected to a large deformation when a constraint occurs in the direction of the frame part defined by the inflection area and its other end, usually normal to the casing. This particular shape of the aft stiffening frame makes it possible to improve its flexibility so that the air intake structure has better resistance to severe deformed shapes that could occur, for example, when a fan breaks on a wide body aircraft.

Abstract: An air guide is disclosed for a bonnet-covered engine bay of a goods vehicles, in particular agricultural tractors, where under the bonnet are located a combustion engine (1), components under high thermal load and low thermal load, and a fan which generates an air flow which is directed through air guide ducts past the combustion engine into the open. As the air flow from the fan heats up greatly on the combustion engine, there is a risk of a deterioration in the functioning of heat-sensitive components exposed to the air flow.

Abstract: A carbon composite duct assembly has a duct body having an opening. The duct body extends along an axis. The opening extends transversely to the axis. The duct body has a carbon composite fabric layer. The duct body has an axial flange extending along the axis and a peripheral flange extending along the opening. The axial flange and the peripheral flange overlap forming a corner of the carbon composite fabric layer.

Abstract: An engine-driven work machine is provided in which an engine/work machine unit (5) and an exhaust muffler (23) are housed in a box (30), the box (30) is provided with a cooling air passage (44) that passes the area around the engine/work machine unit (5) and the exhaust muffler (23), and a cooling fan (15) driven by the engine (2) is disposed in the cooling air passage (44), wherein the box (30) is provided with blocking means (51) for blocking the cooling air passage (44) between the engine (2) and the exhaust muffler (23) when running of the engine (2) is stopped. The heat of the high temperature exhaust muffler can thus be prevented from affecting the engine/work machine unit even when running of the engine is stopped, while maintaining the soundproofing of the box housing the unit, etc.

Abstract: To allow pollutants contained in atmospheric air to be treated effectively at all times during operation of a vehicle. A catalyst layer for treating atmospheric pollutants is formed on at least a surface of cooling fins provided on a cylinder portion of an engine mounted on a vehicle.

Abstract: A heat extractor for attachment to an air-cooled engine. A cooling fan extends from the engine and is rotated by action of the engine. The heat extractor comprises a first thermally conductive surface for attachment to the engine, a plurality of flaps extending from the first surface, wherein when the heat extractor is attached to the engine the flaps extend away from the engine, a flared end region formed in the first surface, the flared end region nearest the cooling fan when the heat extractor is attached to the engine and wherein rotation of the cooling fan causes air to be drawn across the first surface, the plurality of flaps and the flared end region.

Abstract: To improve an intake device (100) for a handheld tool implemented having an air cleaner, particularly for a chainsaw, a cuffing-off grinder, or the like, which comprises an internal combustion engine (25) and a drive unit (20) for the attachment, the air cleaner cleaning combustion air, which is charged with dirt particles, for the engine (25), in that a centrifugal separator (30) separates the combustion air into at least one first air flow (31), which is freed from dirt particles as much as possible, and a second air flow (32), which is loaded with dirt particles, in particular to cause higher efficiency of the intake device, it is suggested that a blower (10) be situated on the drive unit (20), which sucks in the second air flow (32), by which cooling of the drive unit (20) is caused.

Abstract: A forced-air-cooled engine has a main blow-out opening provided to a back plate of a cooling fan cover at a position facing a cylinder part for blowing out cooling air for cooling a cylinder part and a secondary blow-out opening provided to the back plate at a position opposite to the main blow-out opening in regard to the crankshaft center for cooling a part of a crankcase part, wherein a cooling air guide cover is equipped which is composed of a cylinder air-guide cover part which guides air blown out from the main blow-out opening to flow to cool the cylinder part and cylinder head, and a top cover part which guides air blown out from the secondary blow-out opening to flow along a side face of the crankcase part to cool there and then flow into midstream of the cooling air flow blown out from the main blow-out opening and cooling the cylinder part and cylinder head.

Abstract: The snow remover has a cooling fan for directing cooling air to an engine, and an air cleaner. The air cleaner has an air intake for drawing in outside air. The cooling fan and the air intake of the air cleaner is housed within the engine cover. Cooling air is changed to warm air by the cooling of the engine body, and this warm air is guided towards the air intake of the air cleaner by a guide duct.

Abstract: The present invention relates to a cooling system for an engine inside a power generator, in the field of the power generator, which mainly includes a cool air suction hood, an engine housing side cover, an engine housing, a cool air cooling fan, an exhaust pipe; the cool air suction hood is jointed to the engine housing side cover, the left air guide plate and the right air guide plate on the upper of the engine secured to the engine housing, thus form two main cooling and ventilating chambers A and B on the left and right upper portion of the engine. An engine bottom air guide plate is secured to the bottom of engine housing side cover and forms the bottom cooling and ventilating chamber C of the engine with the side cover and an engine crank case rear cover. The engine crank case rear cover, the above-mentioned members, a heat insulation chamber body, a sealing ring and a heat insulation chamber rear hood form a double chamber cooling means of the secondary cooling cycle chamber D.

Abstract: A drilling unit, comprising a chassis (3, 4) and a drilling machine (1, 2) arranged in front of the same, the chassis encasing an engine-house (8), in which an engine (9) is arranged as well as at least one cooler (14) and at least one fan (15), the drilling unit comprising at least one partition wall (17) that divides the engine house (8) into a first part (18), which accommodates the engine (9), and a second part, which accommodates said cooler (14) and fan (15), and that the partition wall (17) extends transverse to the longitudinal direction of the chassis and divides the engine house (8) into a front part (18) and a rear part (19). The first part (18) of the engine house (8) forms the front part and the second part (19) of the engine house (8) forms the rear part.

Abstract: An air cleaner for a portable engine, includes an air cleaner case attached to an upper part of an engine body of the engine. Preferably, the air cleaner case is supported on an upper wall of a shroud covering the engine. Preferably, the air cleaner case is formed integrally with the shroud. Preferably, the air cleaner further includes an air intake structure divided into a plurality of intake passages having inlets displaced relative to each other with respect to an air flow direction in which an intake air flows.

Abstract: To achieve improved cooling in a power unit, a first fan is coupled with an end of a crankshaft of an internal combustion engine to cool at least a cylinder of the internal combustion engine, and a second fan is coupled with another end of the crankshaft to cool at least the cylinder. The cylinder is cooled by the air supplied from the first fan and the second fan.

Abstract: A cover structure for an internal combustion engine covers and protects a coolant pipe of a cooling system component on an internal combustion engine, even when the internal combustion engine only has a short distance provided between a crankshaft and an output shaft. The cover structure includes an outer cover disposed outside an inner cover, thereby defining a space between the first and outer covers. Coolant conduits, which are in fluid communication with a cooling system component, are constructed and arranged to pass through the space between the first and outer covers.

Abstract: An engine operated generator is provided with an engine, a generator driven by the engine, and a power control unit for controlling the power generated by the generator. A fuel gas stored in fuel bottles set in a case for the engine operated generator, is supplied to the engine though a fuel pressure regulator. The fuel bottles and the fuel pressure regulator are disposed adjacent to the power control unit to enable heat exchange with the power control unit provided with an inverter. Thus, heat is mutually utilized between the power control unit and at least one of the fuel bottles as fuel receptacles and the fuel pressure regulator.

Abstract: A fan assembly for an agricultural tractor includes a rotatable fan mechanically driven by a drive shaft coupled to an internal combustion engine. A fan shroud encloses the outer periphery of the fan and is mechanically connected to the engine. A bearing is mounted on the drive shaft and supports the fan shroud so that the drive shaft is rotatable with respect to the fan shroud. The bearing prevents radial and axial movement of the fan shroud relative to the drive shaft. A fan housing is connected to a radiator which is connected to the engine. The fan housing is coupled to an end of the fan shroud by a friction coupler which prevents rotation of the fan shroud.

Abstract: An exhaust system for an engine that produces an exhaust gas during operation. The exhaust system includes a manifold in fluid communication with the engine to receive the exhaust gas and a conduit extending from the manifold in a first direction. An outlet manifold is coupled to the conduit and extends in a second direction substantially normal to the first direction. The outlet manifold defines an aperture oriented such that exhaust gas passes through the aperture and out of the outlet manifold in a third direction that is substantially opposite the first direction.

Abstract: A manually operated implement comprising a housing for accommodating a drive motor that drives a tool. A fan wheel is disposed in the housing and is driven by the drive motor. A fan wheel cover covers the fan wheel toward the outer side of the housing. Ribs are disposed on the outer surface of the fan wheel cover and span an intake opening of the fan wheel cover in the vicinity of the fan wheel. Beyond the intake opening, the ribs form channels, and upper faces of the ribs that face away from the outer surface of the fan wheel cover form an intake face that in a second area of the ribs is disposed transverse to the outer surface of the fan wheel cover.

Abstract: A vehicle has an engine movably mounted on a frame, a fan mounted on an engine driven shaft, a radiator fixedly mounted on the frame, and a hollow shroud assembly which extends from the fan to the radiator. The shroud assembly includes an inner shroud member, an outer shroud member and a flexible annular seal member which interconnects the inner and outer shrouds. The inner shroud member is mounted to the engine and fixed with respect to the engine and the fan. The inner shroud member integrally forms an aspirator port. The outer shroud member is fixed with respect to the frame. The flexible seal member sealingly engages the inner and outer shroud members. The seal member has an annular gripping part and an annular lip which projects away from the gripping part. The gripping part grippingly engages an end of the outer shroud member. The lip engages an outer surface of the inner shroud member.

Abstract: The invention provides a method and construction of vibration control supporting a cooling fan cover.

Abstract: A V-twin engine having a crankcase and a pair of cylinders defining a V-space therebetween, wherein the V-space is substantially enclosed, and a carburetor is positioned within the V-space. An intake air preheating arrangement supplies heated intake air to the carburetor, and a carburetor heating arrangement heats the V-space and the carburetor which is positioned within the V-space. Each of the foregoing arrangements, used separately or in combination within one another, aids in preventing “freeze-up” of the carburetor during running of the engine in a cold environment.

Abstract: An air heating system includes an internal combustion engine powered by combustible gas. Such engine having at least one cylinder and a horsepower determined by size of space to be heated. A source of such gas is in fluid communication with the engine for communicating a requisite amount of gas to such engine. An air intake is disposed in fluid communication with a source of air and the engine for communicating air to the engine. A flywheel is connected to the engine for at least extracting heat therefrom. An air chamber surrounds the engine for directing hot air extracted therefrom to such space to be heated. A heat exchanger is disposed in the air chamber for extracting heat from exhaust gases exiting the air chamber and heating air being returned to system. An exhaust is connected to the air chamber and to outside air for exhausting cooled air from system.

Abstract: The present invention provides an engine assembly including an engine housing, a fan that generates an airflow, a fan housing at least partially covering the engine housing and the fan to direct the airflow over the engine housing, and a fuel tank including a plurality of integrally-formed projections engaging the fan housing to couple the fuel tank to the fan housing.

Abstract: An air cleaner device for a vehicle is provided with an air cleaner body containing an air cleaner element and a snorkel connected to the air cleaner body to introduce the outside air into the air cleaner body. The snorkel extends forward of the vehicle past a side of a cylinder portion which projects upward from an engine, and a front end of the snorkel opens between right and left seats of the vehicle. With this configuration, even if the air cleaner body of the air cleaner device should be flooded, it is difficult for water to enter into the interior. Further, it is difficult for the air cleaner body to be influenced by heat, and difficult for dust to get into the air cleaner body.

Abstract: With regard to a construction that a fan 41 is provided at one side of an engine 1 and covered by a fan casing 45, and an air cleaner 30 is arranged near the fan casing 45 and at a side of a cylinder head 5 on which an intake port 5a is disposed, a suction port 31a communicated with the inside of the fan casing 45 is provided in a main body 31 of the air cleaner 30. A barrier 46 is provided at a position facing to the suction port 31a in the air cleaner 30. A wall standing toward the fan casing 45 and the cylinder head 5 is formed on the outer surface of the main body 31 of the air cleaner 30. An air intake part is provided on one of side surfaces of a cover body 32 of the air cleaner 30 and the cover body 32 is constructed to be an equilateral polygon. An intake pipe 31k communicating the air cleaner 30 with the intake port 5a of the cylinder head 5 is constructed integrally with a main body 31 of the air cleaner 30.