ABSTRACT OF THE DISCLOSUREA four cylinder in-line engine is disclosed with asecondary balancer system, wherein at least one pair of balancerelements are arranged substantially at an identical horizontaldistance from the longitudinal axes of the engine cylinders andon lines which are substantially parallel to the plane of thelongitudinal axes. The distance taken between the axes of thepaired balancer elements in the direction of the cylinder axesis determined at such desired values as to satisfy the engineusage and design. The paired balancer elements are rotated inthe opposite directions to each other with a speed of rotationtwice as high as that of the engine crankshaft, such that thelower balancer element is rotated in the opposite direction tothat of the engine crankshaft.
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