US3745980A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cylinder sleeve system for high output engine
Assignee: Mack Trucks Inc
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Filing: 1971-05-28
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Granted: 1973-07-17
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Expires: 1991-05-28
Abstract
Abstract A cylinder sleeve system for the cylinder block of a high output internal combustion engine includes a circumferential recess in the upper region of each cylinder bore wall that forms with a cylinder sleeve fitted in the bore an annular coolant chamber surrounding the upper region of the sleeve. The chamber has a shallow radial depth, preferably of constant cross section, so as to cause high, generally uniform velocity coolant flow through the chamber, thereby promoting rapid cooling of the upper region. Coolant discharged from the chamber flows to a coolant jacket surrounding the lower region of the cylinder sleeve, where it circulates at reduced velocity to effect slower cooling of the lower region. The coolant in the upper chamber is thus in direct contact with the sleeve while that in the coolant jacket is contained against such direct contact. The recess is sized and located such that the cylinder sleeve is directly supported by the cylinder bore wall over approximately the lower three-fourths of its length. This configuration permits sleeves of reduced wall thickness to be used.
Inventors
- 👤 F Pekar
- 👤 E Eisenberg
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 16:03
CPC Classifications
F; F02; F02F; F02F1/00; F02F1/02; F02F1/10; F02F1/16; F02F1/14; F16; F16J; F16J10/00; F16J10/02; F16J10/04
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
185 words
A cylinder block for an internal combustion engine, comprising: means defining a plurality of vertically extending in-line cylinder bores adapted for the combustion of a fuel-air mixture in the upper regions thereof, a cylinder sleeve located in each bore in snug engagement with the bore wall, the bore wall extending over substantially the full length and around the full circumference of the sleeve, means forming a circumferential recess in the wall of each cylinder bore opposite the upper region of the sleeve, the recess extending fully around the sleeve and defining with the opposed wall of the sleeve an annular chamber surrounding the upper sleeve region, a coolant inlet to each chamber, a coolant outlet from each chamber, and means defining a coolant jacket surrounding the lower regions of the cylinder sleeves, whereby coolant delivered to the upper chambers flows therethrough in direct contact with the sleeve walls, thereby promoting rapid cooling over the upper region of the sleeves, and coolant delivered to the jacket is contained against direct contact with the sleeve walls, thereby promoting slower cooling over the lower regions of the sleeves.
Claim 2
Dependent Claim
185 words
A cylinder block for an internal combustion engine, comprising: means defining a plurality of vertically extending in-line cylinder bores adapted for the combustion of a fuel-air mixture in the upper regions thereof, a cylinder sleeve located in each bore in snug engagement with the bore wall, the bore wall extending over substantially the full length and around the full circumference of the sleeve, means forming a circumferential recess in the wall of each cylinder bore opposite the upper region of the sleeve, the recess extending fully around the sleeve and defining with the opposed wall of the sleeve an annular chamber surrounding the upper sleeve region, a coolant inlet to each chamber, a coolant outlet from each chamber, and means defining a coolant jacket surrounding the lower regions of the cylinder sleeves, whereby coolant delivered to the upper chambers flows therethrough in direct contact with the sleeve walls, thereby promoting rapid cooling over the upper region of the sleeves, and coolant delivered to the jacket is contained against direct contact with the sleeve walls, thereby promoting slower cooling over the lower regions of the sleeves.
Claim 3
Dependent Claim
40 words
A cylinder block according to claim 1 wherein the radial depth of each upper chamber is smaller than that of the coolant jacket so as to provide a higher velocity coolant flow in the upper chamber than in the jacket.
Claim 4
Dependent Claim
39 words
A cylinder block according to claim 2 wherein the outlet from each upper chamber communicates with the coolant jacket, whereby the coolant delivered to the jacket is preheated by passage through the upper chamber prior to entering the jacket.
Claim 5
Dependent Claim
32 words
A cylinder block according to claim 3 wherein each upper chamber has a substantially constant cross section over its full circumferential extent whereby the coolant flows therethrough at a generally uniform velocity.
Claim 6
Dependent Claim
50 words
A cylinder block according to claim 1 wherein the lower end of each recess is spaced from the upper end of the sleeve by a distance approximately one-quarter the length of the sleeve, whereby each sleeve is directly supported by the cylinder bore wall over approximately three-quarters of its length.
Claim 7
Dependent Claim
41 words
A cylinder block according to claim 1 further comprising means in each cylinder bore defining a seal for preventing leakage of coolant from the upper chamber along the interface between the lower region of the sleeve and tHe cylinder bore wall.
Claim 8
Dependent Claim
55 words
A cylinder block according to claim 1 further comprising: a coolant gallery extending along one side of the cylinder bores in the direction of alignment thereof, and wherein the inlet to each annular upper chamber is located on the gallery side of the chamber in communication with the gallery for receiving a coolant flow therefrom.
Claim 9
Dependent Claim
47 words
A cylinder block according to claim 7 wherein the outlet from each annular chamber is located on the opposite side of the chamber from the inlet, whereby the coolant flows through the chamber in a direction generally transverse to the direction of alignment of the cylinder bores.
Claim 10
Dependent Claim
187 words
A cylinder sleeve assembly comprising: a block having at least one cylinder bore formed therein adapted for the combustion of a fuel-air mixture in the upper region thereof, a cylinder sleeve located in the bore in snug engagement with each bore wall, the bore wall extending over substantially the full length and around the full circumference of the sleeve, means forming a circumferential recess in each bore wall opposite the upper region of the sleeve, the recess extending fully around the sleeve and defining with the opposed wall of the sleeve an annular chamber surrounding the upper sleeve region, a coolant inlet to each chamber, a coolant outlet from each chamber, and means, including an outer wall spaced from each cylinder bore wall, defining a coolant jacket surrounding the lower region of each sleeve, whereby coolant delivered to each upper chamber flows therethrough in direct contact with the sleeve wall, thereby promoting rapid cooling of the upper region of the sleeve, and coolant delivered to the jacket is contained against direct contact with the sleeve wall, thereby promoting slower cooling of the lower region of the sleeve.
Claim 11
Dependent Claim
187 words
A cylinder sleeve assembly comprising: a block having at least one cylinder bore formed therein adapted for the combustion of a fuel-air mixture in the upper region thereof, a cylinder sleeve located in the bore in snug engagement with each bore wall, the bore wall extending over substantially the full length and around the full circumference of the sleeve, means forming a circumferential recess in each bore wall opposite the upper region of the sleeve, the recess extending fully around the sleeve and defining with the opposed wall of the sleeve an annular chamber surrounding the upper sleeve region, a coolant inlet to each chamber, a coolant outlet from each chamber, and means, including an outer wall spaced from each cylinder bore wall, defining a coolant jacket surrounding the lower region of each sleeve, whereby coolant delivered to each upper chamber flows therethrough in direct contact with the sleeve wall, thereby promoting rapid cooling of the upper region of the sleeve, and coolant delivered to the jacket is contained against direct contact with the sleeve wall, thereby promoting slower cooling of the lower region of the sleeve.
Claim 12
Dependent Claim
41 words
A cylinder sleeve assembly according to claim 9 wherein the radial depth of each upper chamber is smaller than that of the coolant jacket so as to provide a higher velocity coolant flow in the upper chamber than in the jacket.
Claim 13
Dependent Claim
40 words
A cylinder sleeve assembly according to claim 10 wherein the outlet from each upper chamber communicates with the coolant jacket, whereby the coolant delivered to the jacket is preheated by passage through the upper chamber prior to entering the jacket.
Claim 14
Dependent Claim
33 words
A cylinder sleeve assembly according to claim 11 wherein each upper chamber has a substantially constant cross section over its full circumferential extent, whereby the coolant flows therethrough at a generally uniform velocity.
Claim 15
Dependent Claim
51 words
A cylinder sleeve assembly according to claim 9 wherein the lower end of each recess is spaced from the upper end of the sleeve by a distance approximately one-quarter the length of the sleeve, whereby the sleeve is directly supported by the cyinder bore wall over approximately three-quarters of its length.
Claim 16
Dependent Claim
38 words
A cylinder sleeve assembly according to claim 9 further comprising means defining a seal for preventing leakage of coolant from the upper chamber along the interface between the lower region of the sleeve and the cylinder bore wall.
Claim 17
Dependent Claim
32 words
A cylinder block according to claim 8 wherein each upper chamber has a substantially constant cross section over its full circumferential extent, whereby the coolant flows therethrough at generally a uniform velocity.
References Cited (Backward Citations)
US2037354A
Cited
US2464462A
Cited
DE1059237B
Cited
US3173407A
Cited
US3279443A
Cited
US3315573A
Cited
US3315651A
Cited
US3385273A
Cited
US3568573A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-07-16 | 1977-01-15 | 1977-07-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-07-16 | 1981-01-15 | 1981-07-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-07-16 | 1985-01-15 | 1985-07-17 | $7700.00 | Window Closed / Lapsed |