Cooling system for a liquid-cooled engine

In a cooling system for a liquid-cooled engine mounted as a vertical engine on a vehicle, said improved cooling system comprising:

• a radiator disposed above said engine;
• a muffler disposed in a region below said engine;
• an air intake guide for guiding cooling air to said radiator from outside;
• an exhaust guide for guiding a large part of the cooling air having flowed past said radiator, forwardly of said vehicle, wherein said exhaust guide includes a cooling air release for directing a remaining part of the cooling air having flowed past said radiator toward a carburetor of said engine;
• a cooling fan coupled to said engine for producing air currents flowing from said air intake guide past said radiator to said exhaust guide;
• and
• guide means provided for at least one side of said exhaust guide for guiding part of the cooling air having flowed past said radiator to said muffler.

In a cooling system for a liquid-cooled engine mounted as a vertical engine on a vehicle, said improved cooling system comprising:

• a radiator disposed above said engine;
• a muffler disposed in a region below said engine;
• an air intake guide for guiding cooling air to said radiator from outside;
• an exhaust guide having an exhaust opening for guiding a large part of the cooling air having flowed past said radiator, forwardly of said vehicle to said exhaust opening;
• a cooling fan coupled to said engine for producing air currents flowing from said air intake guide past said radiator to said exhaust guide;
• and
• a pair of guide ducts spaced from each other provided on opposite sides of said exhaust opening, each said guide duct guiding part of the cooling air having flowed past said radiator through said exhaust opening to said muffler, wherein said guide ducts are spaced from each other along said exhaust opening such that part of the cooling air having flowed past said radiator exhausts forwardly of said vehicle.

In a cooling system for a liquid-cooled engine mounted as a vertical engine on a vehicle, said improved cooling system comprising:

• a radiator disposed above said engine;
• a muffler disposed in a region below said engine, said muffler being substantially covered by a muffler cover;
• an air intake guide for guiding cooling air to said radiator from outside;
• a cooling fan operable by a drive from said engine for producing air currents flowing from said air intake guide past said radiator to said exhaust guide;
• an exhaust guide disposed forwardly of said cooling fan in a running direction of the vehicle, said exhaust guide guiding a large part of the cooling air having flowed past said radiator and exhausting it through an exhaust opening;
• and
• at least one duct extending downward for guiding part of the cooling air toward said muffler after the cooling air has flowed past said radiator, said duct having an inlet opened to said exhaust opening in a region adjacent to a lateral side of said exhaust opening, and an outlet opened to said muffler cover.