1. Underfloor cam
Such bottom-mounted camshaft engines are generally designed large displacement, low speed, high torque output pursuit, because the opposite end of the camshaft , it relies driven by the crankshaft and the cam and the rocker arms are connected using a metal rod, a cam rod from the top, a rocker arm push rod to achieve opening and closing an engine valve, so the high speed makes the jack bearing pressure too large to be broken. However, with such a ram design, it has advantages of simple structure, high reliability, the engine restart the heart, and low cost. Because of the low engine speed torque performance is emphasized, the bottom-mounted camshaft is sufficient to meet this demand.