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Partially integrated exhaust manifold

United States Patent

January 20, 2015
View the Complete Patent at the US Patent & Trademark Office
A partially integrated manifold assembly is disclosed which improves performance, reduces cost and provides efficient packaging of engine components. The partially integrated manifold assembly includes a first leg extending from a first port and terminating at a mounting flange for an exhaust gas control valve. Multiple additional legs (depending on the total number of cylinders) are integrally formed with the cylinder head assembly and extend from the ports of the associated cylinder and terminate at an exit port flange. These additional legs are longer than the first leg such that the exit port flange is spaced apart from the mounting flange. This configuration provides increased packaging space adjacent the first leg for any valving that may be required to control the direction and destination of exhaust flow in recirculation to an EGR valve or downstream to a catalytic converter.
Hayman; Alan W. (Romeo, MI), Baker; Rodney E. (Fenton, MI)
GM Global Technology Operations LLC (Detroit, MI)
13/ 751,791
January 28, 2013
STATEMENT OF GOVERNMENT RIGHTS The present invention was made with government support under Cooperative Agreement No. DE-EE0005654 awarded by the Department of Energy. The Government has certain rights in the invention.