WANKEL ROTARY ENGINE

Abstract

This paper emphasizes how Wankel Rotary Engine can potentially compete with the conventional Piston engine following its prime advantages over the competitor. Few of which include, the higher power output, greater torque delivery, elevated power to weight ratio, a smaller and simpler engine design, and culminated vibrations. These rewards, however, weigh less in the eyes of industrialists when the cost of running the engine bounces on the stage. The Rotary engine holds a bad reputation for gulping fuel and lubricant; however, this notorious fame is exaggerated since following its inception in 1957, the globe was struck by a drastic oil crisis in 1973, which led the manufacturers to completely disregard this alluring machine. Mazda remained the only company that stuck with the rotary and kept using it in their RX series automobiles, which the car enthusiasts kept on adoring. We chose to design, build, and test a model of the Wankel Rotary engine since we believe that due to its simpler design it could serve as a steppingstone for Pakistan to move towards vertical integration of such engines (rather than simply assembling modern engines). Moreover, the rotary engine has much more potential to be modified and flourished to improve its defects. We used an iterative technique to design our engine, the initial step was to formulate the dimensions of each part such that the assembly is kinematically correct. The next step was to calculate whether each part could mechanically resist failure under the given loading conditions. If it could, the dimensions would be kept, otherwise, new dimensions were assigned, and the process repeated. The fundamental parts will initially be sand cast by using wooden patterns, these include the engine‟s housing, end plates, rotor, and the eccentric shaft. These sand cast parts will then be precisely machined via a 3-axis milling CNC. The engine can only operate if the auxiliary components are correctly identified and employed. These additional systems include ignition (spark plugs, CDI unit), lubrication (oil pump, oil filter), and starting the engine (starter motor), just to name a few. After assembling all the engine components with the auxiliary systems, we are testing the engine on the dynamometer for the brake horsepower and torque.