Naturally aspirated eight cylinder internal combustion engine

Claim 1

A naturally aspirated eight cylinder internal combustion V-engine equalized for mass and bearing loads by more uniformity in firing intervals of the individual cylinders, in which the cylinders of each bank of cylinders are divided into groups of two cylinders each, the first, second, third and fourth cylinders form one cylinder bank and the fifth, sixth, seventh and eighth cylinders form the second cylinder bank, and in which a firing order of he first, fifth, seventh, second, sixth, third, fourth, and eighth cylinder at a firing interval of 90° crank angle is adopted, and which includes in combination: inlet valve means respectively associated with said cylinders, inlet manifolds, the inlet valve means of one group of cylinders pertaining to the same cylinder bank together communicating with a joint inlet manifold, each two cylinders of one group of cylinders having a firing interval which is at least equal to the opening period of the respective inlet valve means pertaining to the respective group of cylinders, the respective inlet valve means with an alternate firing interval of 270° and 450° crank shaft angle being the inlet valve means which are brought together to the respective joint inlet manifolds, and equalizing container means, said manifolds having approximately the same length designed in conformity with the speed of rotation of said engine and leading into said equalizer container means, said inlet manifolds projecting to a different extent into said equalizing container means in order to obtain nearly equal mean lengths of said inlet manifolds.