Geometry of the Wankel rotary engine

This article describes the basic principles for determining the geometry of Wankel rotary engines. An attempt is made to clarify if the characteristics of the rotary engine are such that the engine may be brought into more general use as an internal combustion hydrogen engine. An analysis of the data indicates that reorganizing the basic mathematical issues would be useful. Also the clarification of the names used to describe the basic curve characterizing the Wankel engine may be useful too. Now in such names and basic mathematical issues there are many differences generating many difficulties in comparison information comingfrom different sources. In this article one most convenient name and form of mathematical equation were chosen and described. The chosen name is the best for communication in the English language, but the other described names can be useful when comparing information from other European languages. This is the first time that the chosen form of mathematical equation is proposed to be used in accordance to construction of Wankel engines. Many other applications of the chosen form of mathematical equation ascertain proper and convenient use. The main advantages of this form of mathematical equation are applications of two main parameters: curve size parameter and dimensionless curve parameter. These two parameters decided about convenience in changing volume of internal combustion engines and comparisons of performance characteristic of different Wankel engines.