Engine

An engine having an engine case on one side of which a V-belt type of continuously variable transmission (CVT) is provided, said CVT being placed in a transmission case and constituted that a V-belt is routed around a drive pulley and a driven pulley, said drive pulley being attached to one end of a crankshaft, said driven pulley being attached to one end of a transmission shaft placed parallel to said crankshaft, characterized in that

• said transmission shaft is supported for free rotation with said engine case, one end of said transmission shaft is made to project in cantilever fashion from said engine case into said transmission case, a clutch mechanism is attached to part of said transmission shaft located in said engine case, said driven pulley is attached to said projected portion, said transmission case is made as a component separate from or independent of said engine case and supported with said engine case so that a space is present between said engine case and said transmission case.

An engine having an engine case on one side of which a V-belt type of continuously variable transmission (CVT) is provided, said CVT being placed in a transmission case and constituted that a V-belt is routed around a drive pulley and a driven pulley, said drive pulley being attached to one end of a crankshaft, said driven pulley being attached to one end of a transmission shaft parallel to said crankshaft, characterized in that

• said crankshaft and said transmission shaft are supported for free rotation with said engine case, one end of said crankshaft and one end of said transmission shaft are projected in cantilever fashion from said engine case into said transmission case, said drive pulley is attached to the projected portion of said crankshaft, said driven pulley is attached to the projected portion of said transmission shaft, said transmission case is made as a component separate from or independent of said engine case and supported with said engine case so that a space is present between said engine case and said transmission case.

An engine having an engine case on one side of which a V-belt type of continuously variable transmission (CVT) is provided, said CVT being placed in a transmission case and constituted that a V-belt is routed around a drive pulley and a driven pulley, said drive pulley being attached to one end of a crankshaft, said driven pulley being attached to one end of a transmission shaft parallel to said crankshaft, characterized in that

• said crankshaft and said transmission shaft are supported for free rotation with said engine case, said transmission case is made as a component separate from or independent of said engine case and supported with said engine case so that a space is present between said engine case and said transmission case, and at least part of the side surface of said transmission case that faces said engine case is a resin member.

An engine having an engine case on one side of which a V-belt type of continuously variable transmission (CVT) is provided, said CVT being placed in a transmission case and constituted that a V-belt is routed around a drive pulley and a driven pulley, said drive pulley being attached to one end of a crankshaft, said driven pulley being attached to one end of a transmission shaft parallel to said crankshaft, characterized in that

• said crankshaft and said transmission shaft are supported for free rotation with said engine case, said transmission case is made as a component separate from or independent of said engine case and supported with said engine case so that a space is present between said engine case and said transmission case, and said V-belt is a resinous belt formed by connecting together a plural number of blocks, with part of each block in contact with said drive pulley and said driven pulley being made of a resin member.

An engine having an engine case on one side of which a V-belt type of continuously variable transmission (CVT) is provided, said CVT being placed in a transmission case and constituted that a V-belt is routed around a drive pulley and a driven pulley, said drive pulley being attached to one end of a crankshaft, said driven pulley being attached to one end of a transmission shaft parallel to said crankshaft, characterized in that

• said crankshaft and said transmission shaft are supported for free rotation with said engine case, said transmission case is made as a component separate from or independent of said engine case and supported with said engine case so that a space is present between said engine case and said transmission case, and a lubricant oil chamber formed at said engine case is made to swell out below said transmission case so that a space is present between said lubricant oil chamber and said transmission case.