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US 7,597,081 B2Granted
Engine secondary air system
AssigneePetroliam Nasional Berhad
InventorDali Abdul Latiff Aw
Life of this patent
Estimating the term…
Abstract
A secondary air injection system for improving emissions of internal combustion engines. The secondary air injection system includes an engine cylinder head and exhaust system designed to be used with or without a secondary air system.
Claims19
A cylinder head for an engine comprising:
- a first exhaust port and a second exhaust port;
- a first lightening pocket located between said first and second exhaust ports;
- a first air passage between said first exhaust port and said first lightening pocket;
- wherein said cylinder head extending along a longitudinal axis, and having longitudinal side walls;
- wherein said first and second exhaust ports having exhaust passage openings on one of said longitudinal side walls;
- and
- wherein said first lightening pocket extending into one of said longitudinal side walls.
4 more elements
A cylinder head comprising:
- a first side and a second side;
- a first exhaust port extending between said first and second sides, wherein the first side defines a first opening of said first exhaust port and wherein the second side defines a second opening of said first exhaust port, wherein said first exhaust port including an exhaust port wall;
- a first air passage extending between one of said first and second sides and said exhaust port wall, and wherein said first air passage is approximately perpendicular to a portion of said exhaust port wall proximate to said first air passage.
A secondary air system comprising:
- a cylinder head having a first exhaust port, a first lightening pocket, wherein said lightening pocket is cast within the cylinder head and including an air supply passage, and a first air passage between said first exhaust port and said first lightening pocket;
- an air supply operationally connected to said lightening pocket;
- an exhaust outlet system connected to said cylinder head and including an air entrance passage between said cylinder head and said air supply;
- and
- wherein said exhaust outlet system includes a recess and an air supply tube, wherein said air supply tube is coupled to said cylinder head and in communication with said air entrance passage, said air entrance passage communicating with said air supply passage.
2 more elements
Dependencies are inferred from the claim text.