Originally Posted By: Eddie
A neat solution in my opinion. However: I'm not sure why the combustion chamber swirl is made to be different in different cylinders. Possibly to increase Scavenging of the exhaust gas SteveC? Ed
I THINK that it's advertising a design nuance as an innovation.
Because of the lack of manifold vacuum on diesels, when they use EGR, they often have to use the port arrangement to provide swirl for mixing (my old Nissan they had a butterfly valve that restricted one set of ports.
If you have a look at the front versus the back of the intake manifold, the direction of the ports helps swirl at one end, and hinders it at the other...looks to me like they are truing to use the port angularity to help at both ends.