METHOD FOR DETECTING RATIO OF BLENDING OF FUEL MIXTURE FOR INTERNAL COMBUSTION ENGINE

摘要

A method includes a step of calculating an estimated blending ratio of a mixed fuel supplied to a combustion chamber of an internal combustion engine and a following equation is effected in this step to derive the estimated blending ratio: B(t)=k*B(t-1)+(1-k)*Bs(t-n) where t is an integer, n is a first delay coefficient set according to an operation parameter and a type of the engine, B(t-1) is an estimated blending ratio derived in the preceding cycle, Bs(t-n) is a blending ratio obtained by use of said blending ratio sensor in a cycle which was effected n cycles before the current cycle, and k is a second delay coefficient set according to a operation parameter and the type of the engine.