89 results about "Air-cooled engine" patented technology

A cooling structure for a working vehicle with a transmission disposed rearwardly and downwardly of a driver's seat and having a hydrostatic transmission, and an air-cooled engine disposed rearwardly of the transmission. The cooling structure comprising a fan for cooling the engine and a fan for cooling the transmission mounted on a rotary shaft operatively connecting the transmission with an output shaft of the air-cooled engine, the fans being configured such that air flows generated by the fans move from adjacent the transmission toward the engine; an oil cooler for cooling fluid supplied to the hydrostatic transmission, the oil cooler being disposed between the fan for cooling the engine and the fan for cooling the transmission, and disposed to face each of the fans; and an air guiding plate disposed at a position higher than the oil cooler for guiding air to regions of the fans.

A surface cooler includes a plate-like layer and a plurality of spaced-apart fins extending substantially perpendicular from an uppermost layer of the plate-like layer. The plurality of fins defining a plurality of air flow paths. The plurality of spaced-apart fins are configured to augment heat transfer of the surface cooler by increasing the turbulence levels of a fluid flowing through the airflow paths by promoting increased mixing with a resulting increase in the heat transfer coefficient of the surface cooler. A method of forming the surface cooler and an engine including the surface cooler.

A motorcycle has a frame with a front and rear portion. A steering assembly is connected to the front portion, and a rear wheel is connected to the rear portion. The motorcycle includes a drive train with an air cooled engine and a transmission. The engine has a front end and a rear end, as well as a left side and a right side. The engine sides are substantially exposed, such that the engine is substantially visible when the motorcycle is viewed from the side. The motorcycle also includes a blower with an air discharge directed towards one of the front or rear ends of the engine, where the blower aid in cooling the engine.

Engine cooling system and method for making same wherein an engine, engine casing, or component thereof or a component related thereto has at least one cooling fin (18) having at least a portion of an edge surface (32) including an engraved, or intagliated portion (40). Preferably the surface edge includes a plurality of intagliated portions (40) with each portion including at least two elongated concavities being in preselected orientation and relationship to each other to improve the cooling efficiency of the fin and thus allow the engine to operate in wider, more extreme range of temperature and environments. The present invention is particularly well suited, but not limited to air-cooled engines and related components such as component covers, inspection / access covers, and oil coolers and is therefore readily adaptable to engines used to propel motor vehicles such as, but not limited to, motorcycles.

The invention provides an air guide structure of a motorcycle. Running air is divided into air towards a driver and air for cooling an engine in a simple structure by a shield. An outer shield (100) and an inner shield (200) form a shield (22) for covering each front lateral surface of a fuel tank (20) and a cylinder (5). The inner shield (200) is provided with a first air guide part (210) on theupper part and a second air guide part (240) on the lower part, and each air guide part receives the running air. The running air is received in a first ventilation passage between the outer shield (100) and the inner shield (200) from a first air guide port (210) by the first air guide part (210), is bent towards the oblique upper part to flow to the rear part, flows out of the rear part from anexhaust outlet, and faces a driver seat (21a) through the lateral surface of the fuel tank (20). The lower part of the shield (22) is provided with a second ventilation passage which bends the running air received to the second air guide passage from an air guide port (242) of a second ventilation part (24) to the oblique rear part and the lower part, and the running air flows to the lateral surface of the cylinder (5) of an air-cooled engine to perform cooling.

In a multi-blade fan for an air-cooled engine, by defining the inlet angle β1 and the angle β′2 to make the sum thereof less than 80° (preferably defining β1 as 32° and β′2 as 36°), the multi-blade fan achieves greater air volume than in the case where the sum is made 80° or greater, where β1 is the angle between the relative velocity direction and the peripheral direction on the inlet side of the blades, β2 is the angle between the relative velocity direction and the peripheral direction on the outlet side of the blades, and β′2 is the difference obtained by subtracting β2 from 180°. The number of blades can therefore be reduced to realize lower noise level while still maintaining the same air volume as the prior art multi-blade fan.

The invention belongs to the technical field of generator sets and particularly discloses a vertical silent generator set. The vertical silent generator set comprises a silent cabinet, an air cooled engine and a generator, wherein the air cooled engine and the generator are arranged in the silent cabinet; the air cooled engine is dynamically connected with the generator through a main shaft on the air cooled engine. The vertical silent generator set is characterized in that the air cooled engine and the generator are respectively located in an upper cavity and a lower cavity in the silent cabinet, and moreover, the air cooled engine and the generator are respectively and vertically arranged; positions on the silent cabinet, which respectively correspond to cooling fins of the air cooled engine, are respectively provided with a first cooling air inlet; a position on the silent cabinet, which corresponds to a fan of the air cooled engine, is provided with a first heat dissipation air inlet; a position on the silent cabinet, which corresponds to the bottom part of the generator, is provided with a second cooling air inlet; and positions on the silent cabinet, which respectively correspond to turbo fans of the generator, are respectively provided with a second heat dissipation air inlet. The vertical silent generator set disclosed by the invention is simple in structure, and on the premise that the cost is reduced, the heat dissipation effect of the whole generator set is improved, and meanwhile, the installation space is saved.

An air-cooled engine is hung and fixed under a rear part of a backbone of a body frame. The engine is disposed so that the center axis of a cylinder in its cylinder block extends approximately horizontally and so that its cylinder head is directed toward the front. A fuel injection device is located between an intake valve and an intake port in the cylinder head. An injection nozzle of the fuel injection device and an intake valve opening are placed at a short distance. While the vehicle is idling or running at low speed, the vicinity of the tip of an injector of the fuel injection device is cooled by assist air supplied from a throttle body through a secondary passage, and when the vehicle runs normally or at high speed, the fuel injection device is cooled by the wind that hits the cylinder head.

An air-cooled engine is hung and fixed under a rear part of a backbone of a body frame. The engine is disposed so that the center axis of a cylinder in its cylinder block extends approximately horizontally and so that its cylinder head is directed toward the front. A fuel injection device is located between an intake valve and an intake port in the cylinder head. An injection nozzle of the fuel injection device and an intake valve opening are placed at a short distance. While the vehicle is idling or running at low speed, the vicinity of the tip of an injector of the fuel injection device is cooled by assist air supplied from a throttle body through a secondary passage, and when the vehicle runs normally or at high speed, the fuel injection device is cooled by the wind that hits the cylinder head.

An air-cooled engine includes a muffler that is attached to an exhaust port of a cylinder and a fan case that houses a cooling fan, and a cylinder cooling room is formed by a cylinder cover that houses the cylinder. A muffler cooling room is formed by a first muffler cover that covers at least some of the muffler through a clearance and a second muffler cover that covers at least some of the first muffler cover through a clearance. Some of cooling air generated by the cooling fan is supplied to the muffler cooling room. The cooling air is supplied to at least one of a first space between the muffler and the first muffler cover and a second space between the first muffler cover and the second muffler cover.

An oil cooling system of an air-cooled engine for cooling the oil reserved in a crankcase of the engine comprises a base plate assembled to the crankcase, an overlapping plate assembled to the base plate; an oil filter supported in the overlapping plate; and radiation fins formed on the base plate and the overlapping plate, wherein the base plate includes an inlet port for receiving the engine oil discharged from an oil pump of the engine, an outlet groove for outputting the engine oil and a first passage groove connecting the inlet port and the outlet groove, the overlapping plate includes an inlet groove opposed to the inlet port, an outlet port opposed to the outlet groove and a second passage groove opposed to the first passage groove to form an oil passage together with the first passage groove, and the base plate and the overlapping plate having through-holes where the filter outlet of the oil filter passes through for the connection with the crankcase.

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.

A throttle body is connected to a rear portion of a cylinder head of an air-cooled engine, and a fuel pump is disposed in front of the engine. The fuel pump is such as to be disposed below a fuel tank 6 such a manner as to be separated therefrom and to be integrated with an auxiliary tank. Fuel is sent under pressure from the fuel pump to the throttle body via a fuel feed tube, and surplus fuel is returned to the integrated auxiliary tank, consequently, no piping for return fuel being required. Vapor generated in the fuel 23 returns to a space above a fuel level resulting when the fuel tank 6 is filled up via an exclusive return tube and is, therefore, prevented from mixing into fuel.

The invention provides a method and construction of vibration control supporting a cooling fan cover. In a forcer-air-cooled engine having a cooling fan cover fixed directly by means of fixing bolts to the cylinder block at fixing foot parts provided at a peripheral border of the fan cover, band-like vibration damping members are disposed between the peripheral border of the fan cover and the cylinder block in each region of the peripheral border belonging to each sector part defined between two adjacent fixing points of two adjacent fixing foot parts among said plurality of fixing foot parts respectively so that each of said damping members is pressed against the cylinder block by each region of the peripheral border when the bolts are tightened, said band-like damper members are flexible damping members each of which is disposed in an essential part of loop of vibration of the periphery for preventing generation of noise due to vibration of the fan cover with the fixing points as nodes of vibration resonating to cylinder block vibration, and said band-like flexible vibration damping members are adjusted thereby to adjust elastic force and damping capacity of the damping members so that resonance of the fan cover occurs at a rotation speed of engine higher than normal rotation speed thereof.

Engine cooling system and method for making same wherein an engine, engine casing, or component thereof or a component related thereto has at least one cooling fin (18) having at least a portion of an edge surface (32) including an engraved, or intagliated portion (40). Preferably the surface edge includes a plurality of itagliated portions (40) with each portion including at least two elongated concavities being in preselected orientation and relationship to each other to improve the cooling efficiency of the fin and thus allow the engine to operate in wider, more extreme range of temperatures and environments. The present invention is particularly well suited, but not limited to air-cooled engines and related components such as component covers, inspection / access covers, and oil coolers and is therefore readily adaptable to engines used to propel motor vehicles such as, but not limited to, motorcycles.

An air-cooled engine includes a muffler (8) that is attached to an exhaust port of a cylinder (2) and a fan case (9) that houses a cooling fan (18), and a cylinder cooling room (34) is formed by a cylinder cover that houses the cylinder (2). A muffler cooling room (35) is formed by a first muffler cover (11) that covers at least some of the muffler (8) through a clearance and a second muffler cover (12) that covers at least some of the first muffler cover (11) through a clearance. Some of cooling air generated by the cooling fan (18) is supplied to the muffler cooling room (35). The cooling air is supplied to at least one of a first space (32A) between the muffler (8) and the first muffler cover (11) and a second space (32B) between the first muffler cover (11) and the second muffler cover (12).

The invention discloses a novel engine oil cooling system externally equipped with a condenser at an air inlet of an air-cooled engine. The novel engine oil cooling system comprises an engine oil inlet pipe and an engine oil outlet pipe, wherein one end of the engine oil inlet pipe is connected with an oil outlet of an engine body chamber cover, the other end of the engine oil inlet pipe is connected with the condenser; one end of the engine oil outlet pipe is connected with an oil inlet of the engine body chamber cover, and the other end of the engine oil outlet pipe is connected with the condenser; and the condenser is installed on an air inlet of an engine air guide cover. The novel engine oil cooling system has reasonable structure, and enjoys extremely excellent cooling effect by sucking engine oil from the inside of an engine and enabling an engine oil cooler to have the maximum cooling area through large supply air rate of the air inlet of the air guide cover.