Patent ID: 9574522
Date: 2017-02-21
CPC Classifications: F02F,F02M,Y02T

Claim:
1. An assembly for an engine cylinder block having four in-line cylinders arranged in axial order as a first cylinder, a second cylinder, a third cylinder, and a fourth cylinder, the assembly comprising: a cylinder head with an integrated exhaust manifold that has four exhaust flow passages directing cylinder exhaust from inlets arranged to correspond with exhaust from the four cylinders, respectively, and has only three outlets at a side face of the cylinder head; wherein none of the exhaust flow passages of the integrated exhaust manifold overlap one another in a vertical direction; a twin scroll turbocharger having a housing with a first scroll passage, a second scroll passage, and only three inlets; wherein the housing is mounted directly to the side face of the cylinder head without a flow adapter therebetween, with the three inlets of the housing at the side face and in fluid communication with the three outlets of the cylinder head; wherein none of the three inlets of the twin scroll turbocharger overlap in the vertical direction at the side face; wherein the integrated exhaust manifold and the housing are configured so that two of the exhaust flow passages join in the cylinder head to direct exhaust flow into only one of the inlets of the housing and through the first scroll passage, and exhaust flow through the other two of the exhaust flow passages flows separately into the other two inlets in the housing and joins in the housing to flow through the second scroll passage.