Patent ID: 8181630

Claim:
A manifold block for improving the efficiency of an internal combustion engine, the block being adapted to be located between an inlet manifold of the engine and a cylinder thereof, the block having a plurality of manifold channels therethrough, the manifold channels each having an input end and an output end, wherein the input end communicates in use with the inlet manifold and the output end communicates in use with the cylinder, each manifold channel including at least one injector head channel located towards the input end of the manifold and adapted to receive a fuel injector, each manifold channel having a longitudinal axis and a transverse axis, said injector head channel being orientated with respect to at least one of the longitudinal and transverse axes of the manifold channel at an angle of convergence from 5° to 85° such that fuel injection into the manifold channel impinges against a manifold channel wall and adopts, by virtue of the convergence angle, a swirling path of motion through the manifold channel.