Patent ID: 6142129
Filing Date: 2000-11-07
Classification: F01L,F01M,F02B,F16H

Abstract:
An engine comprising:first and second cylinder blocks having first and second cylinder bores extending therethrough in directions opposed to each other at 180.degree. with respect to each other, said first and second cylinder blocks being commonly connected to a crank case in such a manner that an axial line of said first cylinder bore is offset from an axial line of said second cylinder bore toward one end of said crank shaft along the axial line of said crank shaft;first and second cylinder heads forming combustion chambers between said first and second cylinder heads and pistons slidably fitted in said cylinder bores are connected to said first and second cylinder blocks, respectively;a cam chain chamber provided in said crank case, said cylinder blocks and said cylinder heads on said one end of said crank shaft along the axial line of said crank shaft; andfirst and second cam chains for reducing rotational power of said crank shaft into half and transmitting the reduced rotational power to ends of first and second cam shafts linked to intake valves and exhaust valves for taking air in said combustion chambers and discharging the exhaust gas from said combustion chambers, respectively, said first and second cam chains being contained in said cam chain chamber; anda breather chamber provided in said second cylinder block, said second cylinder head and said crank case at a position between said cam chain chamber and said second cylinder bore.