| 摘要 |
PURPOSE:To reduce the number of timing pulleys and decrease engine width without increasing engine length by arranging a means for transmitting driving force of one cam shaft to the other cam shaft, utilizing space produced either in fron of or at the rear of cylinder rows. CONSTITUTION:A V type engine 1 has two cylinder rows 2 and 3. Each cylinder head attached on the top surface of cylinder block of each cylinder row 2 and 3 is equipped with suction cam shafts 10A and 11A and exhaust cam shafts 10B and 11B respectively symmetrically when seen from the crank shaft direction. In this case, a timing belt 15 is installed over timing pulleys 11, 12 respectively fixed at the front ends of the cam shafts 10B, 11A and a crank pulley fixed near the front end of the crank shaft. And gears 21 through 24 constituting a means for driving force transmission are arranged in the part where cylinders are not located, namely in the free space at the rear of the first cylinder row 2 and in front of the second cylinder row 3.
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