Abstract In an internal combustion engine of the type having a closed cooling air conducting system associated with the engine cylinder or cylinders, a cooling air blower in the system, sound muffling means associated with the system, and an air filter through which combustion air is introduced to the cylinder or cylinders, long sound deadening channels are provided without a simultaneous increase in the overall constructional size of the engine. The inlet side of the conducting system is made of a maximum length utilizing the free space which is available on the outer sides of the engine, the filter is fastened from the exterior to a wall of the conducting system to receive air from the interior of the conducting system, the suction tube of the cylinder or cylilnders is arranged within the conducting system to communicate with the discharge of the air filter, and the exit side of the conducting system is made of maximum length by utilizing the free space available at the outer side of the engine, and surrounds the exhaust conduit of the cylinder or cylinders.
An internal combustion engine comprising at least one combustion cylinder, a cooling air conducting sYstem including a cooling air blower associated with said cylinder, and sound muffling means incorporated in said cooling air conducting system wherein the conducting system comprises an air admission section in the form of tubular ducting which is disposed round said cooling air blower in spiral or volute form wherein said tubular ducting is provided with an air admission port substantially at the uppermost part thereof, and an air filter being disposed in the cooling air conducting system.
Claim 2
Dependent Claim
92 words
An internal combustion engine comprising at least one combustion cylinder, a cooling air conducting sYstem including a cooling air blower associated with said cylinder, and sound muffling means incorporated in said cooling air conducting system wherein the conducting system comprises an air admission section in the form of tubular ducting which is disposed round said cooling air blower in spiral or volute form wherein said tubular ducting is provided with an air admission port substantially at the uppermost part thereof, and an air filter being disposed in the cooling air conducting system.
Claim 3
Dependent Claim
65 words
An internal combustion engine according to claim 1 wherein the discharge side of the conducting system includes a channel disposed closely adjacent and along said cylinder and extending downwardly along and adjacent the crank case of the engine, the channel also surrounding the combustion exhaust pipe of the engine, such that the damping passage on the discharge side is approximately the height of the engine.
Claim 4
Dependent Claim
33 words
An internal combustion engine according to claim 1 wherein said air filter is disposed upright in the cooling air conducting system on a wall of the latter adjacent the head of the cylinder.