US3869859A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Engine and valve cover therefor having integral air gallery
Assignee: Motors Liquidation Co
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Filing: 1974-01-17
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Granted: 1975-03-11
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Expires: 1994-01-17
Abstract
Abstract An internal combustion engine having a system for supplying secondary combustion air to the engine exhaust ports is provided with air distribution means incorporated within adjoining portions of the engine cylinder heads and their respective valve covers. The covers may include distribution galleries formed as open-bottom longitudinal recesses which register with distribution passages in the cylinder heads. The cylinder head cover gaskets may be formed with orifices registering with the distribution passages to meter air supplied thereto. The air gallery open recesses permit die casting of the valve covers and internal air galleries to their final dimensions.
Inventors
- 👤 William F Thornburgh
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 03:55
CPC Classifications
F; F01; F01N; F01N3/00; F01N3/08; F01N3/10; F01N3/24; F01N3/30; F01N3/34; F02; F02B; F02B75/00; F02B75/16; F02B75/18; F02B75/22; F02F; F02F2200/00; F02F2200/06; F02F7/00; F02F7/006; Y; Y02; Y02T; Y02T10/00; Y02T10/10; Y02T10/12
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
221 words
An internal combustion engine of the type having a system for supplying secondary air to the exhaust ports for reaction with combustibles in the exhaust gases, said engine comprising a cylinder block having a plurality of cylinders longitudinally aligned in a bank, a cylinder head closing the outer ends of said cylinders and defining therewith combustion chambers at the ends thereof, exhaust ports in said cylinder head and connecting with said combustion chambers and exhaust valve means carried in said cylinder head and operable to control communication of said combustion chambers with said exhaust ports, said cylinder head having a peripheral valve cover mounting surface and a plurality of secondary air passages in said head extending between said exhaust ports and said valve cover mounting surface for directing secondary air to said ports, and a cylinder head cover secured on said cover mounting surface to enclose portions of said valve means, said cover having a side wall one edge of which sealingly engages said mounting surface, said side wall having a longitudinal recess formed therein open along said edge, said recess forming a gallery registering with said cylinder head secondary air passages and closed by the sealing engagement of said side wall with said mounting surface, and means in said cover for connecting said recess with a source of secondary air.
Claim 2
Dependent Claim
221 words
An internal combustion engine of the type having a system for supplying secondary air to the exhaust ports for reaction with combustibles in the exhaust gases, said engine comprising a cylinder block having a plurality of cylinders longitudinally aligned in a bank, a cylinder head closing the outer ends of said cylinders and defining therewith combustion chambers at the ends thereof, exhaust ports in said cylinder head and connecting with said combustion chambers and exhaust valve means carried in said cylinder head and operable to control communication of said combustion chambers with said exhaust ports, said cylinder head having a peripheral valve cover mounting surface and a plurality of secondary air passages in said head extending between said exhaust ports and said valve cover mounting surface for directing secondary air to said ports, and a cylinder head cover secured on said cover mounting surface to enclose portions of said valve means, said cover having a side wall one edge of which sealingly engages said mounting surface, said side wall having a longitudinal recess formed therein open along said edge, said recess forming a gallery registering with said cylinder head secondary air passages and closed by the sealing engagement of said side wall with said mounting surface, and means in said cover for connecting said recess with a source of secondary air.
Claim 3
Dependent Claim
221 words
An internal combustion engine of the type having a system for supplying secondary air to the exhaust ports for reaction with combustibles in the exhaust gases, said engine comprising a cylinder block having a plurality of cylinders longitudinally aligned in a bank, a cylinder head closing the outer ends of said cylinders and defining therewith combustion chambers at the ends thereof, exhaust ports in said cylinder head and connecting with said combustion chambers and exhaust valve means carried in said cylinder head and operable to control communication of said combustion chambers with said exhaust ports, said cylinder head having a peripheral valve cover mounting surface and a plurality of secondary air passages in said head extending between said exhaust ports and said valve cover mounting surface for directing secondary air to said ports, and a cylinder head cover secured on said cover mounting surface to enclose portions of said valve means, said cover having a side wall one edge of which sealingly engages said mounting surface, said side wall having a longitudinal recess formed therein open along said edge, said recess forming a gallery registering with said cylinder head secondary air passages and closed by the sealing engagement of said side wall with said mounting surface, and means in said cover for connecting said recess with a source of secondary air.
Claim 4
Dependent Claim
221 words
An internal combustion engine of the type having a system for supplying secondary air to the exhaust ports for reaction with combustibles in the exhaust gases, said engine comprising a cylinder block having a plurality of cylinders longitudinally aligned in a bank, a cylinder head closing the outer ends of said cylinders and defining therewith combustion chambers at the ends thereof, exhaust ports in said cylinder head and connecting with said combustion chambers and exhaust valve means carried in said cylinder head and operable to control communication of said combustion chambers with said exhaust ports, said cylinder head having a peripheral valve cover mounting surface and a plurality of secondary air passages in said head extending between said exhaust ports and said valve cover mounting surface for directing secondary air to said ports, and a cylinder head cover secured on said cover mounting surface to enclose portions of said valve means, said cover having a side wall one edge of which sealingly engages said mounting surface, said side wall having a longitudinal recess formed therein open along said edge, said recess forming a gallery registering with said cylinder head secondary air passages and closed by the sealing engagement of said side wall with said mounting surface, and means in said cover for connecting said recess with a source of secondary air.
Claim 5
Dependent Claim
165 words
An internal combustion engine including means defining a plurality of aligned cylinders closed at outer ends thereof by a cylinder head having exhaust ports connecting with said cylinders, valve means controlling exhaust flow through said ports and a valve cover mounted on said cylinder head, said cylinder head and valve cover having adjoining longitudinal walls adjacent said exhaust ports, wherein the improvement comprises a secondary air gallery formed between said adjoining longitudinal walls of said cylinder head and valve cover by a recess extending in one of said walls longitudinally adjacent each of said exhaust ports, said recess Being open its full length through an edge of said one wall which sealingly engages a mounting surface of said other wall to close said air gallery, a secondary air pump mounted on the engine, means connecting said air pump with said cylinder head air gallery and a plurality of air supply passages in said cylinder head connecting said air gallery with each of said exhaust ports.
Claim 6
Dependent Claim
165 words
An internal combustion engine including means defining a plurality of aligned cylinders closed at outer ends thereof by a cylinder head having exhaust ports connecting with said cylinders, valve means controlling exhaust flow through said ports and a valve cover mounted on said cylinder head, said cylinder head and valve cover having adjoining longitudinal walls adjacent said exhaust ports, wherein the improvement comprises a secondary air gallery formed between said adjoining longitudinal walls of said cylinder head and valve cover by a recess extending in one of said walls longitudinally adjacent each of said exhaust ports, said recess Being open its full length through an edge of said one wall which sealingly engages a mounting surface of said other wall to close said air gallery, a secondary air pump mounted on the engine, means connecting said air pump with said cylinder head air gallery and a plurality of air supply passages in said cylinder head connecting said air gallery with each of said exhaust ports.
Claim 7
Dependent Claim
85 words
An engine according to claim 2 wherein said longitudinal recess is in said valve cover and further including a gasket between said cylinder head and said cover and sealing the joint therebetween said gasket extending across and closing the open side of said cover recess, and a plurality of openings in said gasket and registering with said cylinder head air supply passages, said gasket openings comprising orifices sized to meter the flow of secondary air from said pump to said exhaust ports in desired proportions.
Claim 8
Dependent Claim
15 words
The engine of claim 3 wherein said valve cover is formed as a die casting.
Claim 9
Dependent Claim
172 words
A valve cover and integral air gallery for an internal combustion engine, said valve cover comprising a cast member having a pair of generally parallel spaced side walls connected at their ends by end walls generally normal to said side walls and a connecting wall merging into said side and end walls and extending therebetween to define an open sided elongated enclosure, said side and end walls being provided at their edges adjacent the open side of said enclosure with a thickened peripheral rim adapted to sealingly engage the valve cover mounting surface of an associated engine, one of the side walls of said cast member being longitudinally bifurcated to form a longitudinal recess extending a major portion of the length of said one side and open its entire length along its edge within the rim portion of said one side wall, and passage means in said cast member through one of said walls and connecting with said recess to provide means for connecting said recess with an external source of air.
Claim 10
Dependent Claim
172 words
A valve cover and integral air gallery for an internal combustion engine, said valve cover comprising a cast member having a pair of generally parallel spaced side walls connected at their ends by end walls generally normal to said side walls and a connecting wall merging into said side and end walls and extending therebetween to define an open sided elongated enclosure, said side and end walls being provided at their edges adjacent the open side of said enclosure with a thickened peripheral rim adapted to sealingly engage the valve cover mounting surface of an associated engine, one of the side walls of said cast member being longitudinally bifurcated to form a longitudinal recess extending a major portion of the length of said one side and open its entire length along its edge within the rim portion of said one side wall, and passage means in said cast member through one of said walls and connecting with said recess to provide means for connecting said recess with an external source of air.
Claim 11
Dependent Claim
28 words
A valve cover as defined in claim 5 and wherein said cast member is formed as a die casting without machining except for said air source connecting means.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-03-10 | 1978-09-09 | 1979-03-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-03-10 | 1982-09-09 | 1983-03-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-03-10 | 1986-09-09 | 1987-03-11 | $7700.00 | Window Closed / Lapsed |