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US 8,256,213 B2Granted
Cylinder head for an internal combustion engine
AssigneeFord Global Technologies, LLC
InventorsKai Sebastian Kuhlbach, Guenter Bartsch, Jens Dunstheimer, Martin Lutz
Life of this patent
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Abstract
A cylinder head has at least three cylinders each coupled to at least one exhaust port, individual exhaust ducts coupled to each of the exhaust ports, and a combined exhaust duct coupling all individual exhaust ducts. The combined exhaust duct emerges from the cylinder head at a location displaced longitudinally from a center of the cylinder head.
Claims11
A cylinder head, comprising:
- three cylinders including at least one inner cylinder and two outermost cylinders, each cylinder comprising two exhaust ports;
- individual exhaust ducts coupled to each cylinder through the exhaust ports and coupled together into a combined exhaust duct that exits the cylinder head at a point displaced longitudinally from one of the outermost cylinders at a distance 60% to 85% of the length between the two outermost cylinders as measured between the center axes of each of the outermost cylinders thus providing less pronounced curvature of the exhaust ducts closer to the combined exhaust duct.
A cylinder head, comprising:
- at least three cylinders having individual exhaust ducts;
- and
- a combined exhaust duct coupling all individual exhaust ducts and emerging longitudinally displaced a distance X from an axis of a first outer cylinder;
- 0.60*L<x<0.85*L;
- where L is distance between center axes of first and second outer cylinders, to provide less pronounced curvature of the individual exhaust ducts closer to the combined exhaust duct.
2 more elements
A cylinder head, comprising:
- three cylinders each having an associated exhaust duct coupling a pair of exhaust ports;
- and
- a combined exhaust duct coupling the associated exhaust ducts and emerging from the cylinder head displaced longitudinally from an outer cylinder between 0.6 and 0.85 of the length between outer cylinders as measured between the center axes of each of the outermost cylinders thus providing less pronounced curvature of the exhaust ducts closer to the combined exhaust duct.
A cylinder head, comprising:
- at least three cylinders arranged along a longitudinal axis of the cylinder head with each cylinder coupled to at least one exhaust port;
- an individual exhaust duct coupled to exhaust ports associated with each cylinder;
- and
- a combined exhaust duct coupling all individual exhaust ducts wherein the combined exhaust duct emerges from the cylinder head displaced longitudinally from an outer cylinder between 0.6 and 0.85 of the length between outer cylinders as measured between the center axes of each of the outermost cylinders thus providing less pronounced curvature of the exhaust ducts closer to the combined exhaust duct.
1 more element
Dependencies are inferred from the claim text.