Mark D Duffy

US Patent:

20030070426, Apr 17, 2003

Filed:

Oct 12, 2001

Appl. No.:

09/976873

Inventors:

Mark Duffy - Waterford MI, US

International Classification:

F01N003/00
F01N003/10

US Classification:

060/305000, 060/304000, 060/289000

Abstract:

Apparatus for supplying supplemental air to exhaust gases exiting exhaust ports in a wall of a cylinder head of a multi-cylinder internal combustion engine and entering runners of an exhaust manifold through runner inlet ports aligned with the respective exhaust ports. An air injection plate is interposed between the cylinder head and the manifold. The air injection plate has openings aligned and registering with the respective exhaust ports and runner inlet ports. A fitting directs the supplemental air to the air injection plate openings to combine with the exhaust gases passing from the exhaust ports to the runner inlet ports.