Optimum spark advance mapping of Otto engine based on knock detection

The problem of increasing the power and efficiency of the Otto engine always constrained by the occurrence of knock, that it will reduce the power and efficiency, in addition up to now still do not get a complete solution. From the fact that the operating area that produces power and high efficiency is the area close to the knock. In this research will provide a method of making the optimum spark advance map, which can generate power and high efficiency but there was no knock.