Machine Parts

By following reciprocating engine basic features of rotary engine given bellow 1.       There are no reciprocating parts. Thus the problems of inbalance caused by the inertia of reciprocating parts and complicated engine vibration is eliminated. In rotary engines vibrations is very low because it is possible to perfectly balance the engine by using the balancing weights. Also rotary engine does not require a cranking mechanism, it has the advantage of smooth motion, less mechanical loss, simple construction and compactness. 2.       There is no separate intake –exhaust valve mechanism. In a reciprocating engine intake exhaust valve mechanism generates mechanical noise by opening and closing of the valves and the valves themselves obstruction air flow. Due to inertia of valve mechanism, the valves are unable to fully follow the motion of the cam at high revolutions. This results in variation in effective valve timings of the engine. But a rotary engin

The overhead camshaft type valve actuating mechanism is generally preferred over the side camshaft type mainly of it’s because of it’s greater rigidity since the camshaft direct the operates the valve instead of operating through push rod and rocker arm. Due to this the valve is open and closely quicker with decreased vibrations and undesirable oscillation. This means increase of high lift, high acceleration cam profile, the   valve operation in case of overhead camshaft is much more precise and smooth than in case of the side camshaft valve system.   However in case of overhead camshaft with inverted bucker follower, the valve lift is equal to the cam lift, whereas in case of the side camshaft, the cam size has to be relatively larger for the same valve lift, which leads to higher cam to follower velocities and relatives rubbing velocities resulting inside thrust reaction caused by the cam action.