US5233947A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cooling system of a cylinder of an internal combustion engine
Assignee: Toyota Motor Corp
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Filing: 1992-11-20
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Granted: 1993-08-10
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Expires: 2012-11-20
Abstract
Abstract A cooling system of a cylinder liner of an internal combustion engine includes a plurality of first passages formed on an outer surface of the cylinder liner of the internal combustion engine and spaced apart from each other. A second passage is formed on the outer surface of the cylinder liner and runs in an axial direction of the cylinder liner, coupling the first passages to each other. The second passage receives, via an inflow part thereof, a coolant supplied in a traverse direction substantially perpendicular to the axial direction. A third passage is formed on the outer surface of the cylinder liner, and runs in the axial direction of the cylinder liner, coupling the first passages to each other. The third passage outputs the coolant received from the first passages to an outflow part thereof. The second passage has a traverse-sectional area which decreases as a distance of the traverse-sectional area from the inflow part increases. The third passage has a traverse-sectional area which decreases as a distance of the traverse-sectional area of the third passage from the outflow part increases.
Inventors
- 👤 Shizuo Abe
- 👤 Masayoshi Tokoro
- 👤 Masato Kawauchi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 01:49
CPC Classifications
F; F02; F02F; F02F1/00; F02F1/02; F02F1/10; F02F1/14
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
192 words
A cooling system of a cylinder liner of an internal combustion engine, said cooling system comprising: a plurality of first passages formed on an outer surface of the cylinder liner of the internal combustion engine and spaced apart from each other; a second passage formed on the outer surface of the cylinder liner, said second passage running in an axial direction of the cylinder liner and coupling the first passages to each other, said second passage receiving, via an inflow part thereof, a coolant supplied in a traverse direction substantially perpendicular to the axial direction; and a third passage formed on the outer surface of the cylinder liner, said third passage running in the axial direction of the cylinder liner and coupling the first passages to each other, said third passage outputting the coolant received from the first passages to an outflow part thereof, wherein: the second passage has a traverse-sectional area which decreases as a distance of the traverse-sectional area from said inflow part increases; and the third passage has a traverse-sectional area which decreases as a distance of the traverse-sectional area of the third passage from said outflow part increases.
Claim 2
Dependent Claim
192 words
A cooling system of a cylinder liner of an internal combustion engine, said cooling system comprising: a plurality of first passages formed on an outer surface of the cylinder liner of the internal combustion engine and spaced apart from each other; a second passage formed on the outer surface of the cylinder liner, said second passage running in an axial direction of the cylinder liner and coupling the first passages to each other, said second passage receiving, via an inflow part thereof, a coolant supplied in a traverse direction substantially perpendicular to the axial direction; and a third passage formed on the outer surface of the cylinder liner, said third passage running in the axial direction of the cylinder liner and coupling the first passages to each other, said third passage outputting the coolant received from the first passages to an outflow part thereof, wherein: the second passage has a traverse-sectional area which decreases as a distance of the traverse-sectional area from said inflow part increases; and the third passage has a traverse-sectional area which decreases as a distance of the traverse-sectional area of the third passage from said outflow part increases.
Claim 3
Dependent Claim
60 words
A cooling system as claimed in claim 1, wherein: said second passage has a diameter which gradually decreases as the distance of the traverse-sectional area of said second passage from said inflow part increases; and said third passage has a diameter which gradually decreases as the distance of the traverse-sectional area of said third passage from said outflow part increases.
Claim 4
Dependent Claim
27 words
A cooling system as claimed in claim 2, wherein the diameter of each of said second and third passages is a diameter measured in the traverse direction.
Claim 5
Dependent Claim
50 words
A cooling system as claimed in claim 3, wherein: said second passage has a fixed diameter measured in a direction perpendicular to the traverse direction and the axial direction; and said third passage has a fixed diameter measured in the direction perpendicular to the traverse direction and the axial direction.
Claim 6
Dependent Claim
35 words
A cooling system as claimed in claim 2, wherein the diameter of each of said second and third passages is a diameter measured in a direction perpendicular to the traverse direction and the axial direction.
Claim 7
Dependent Claim
34 words
A cooling system as claimed in claim 5, wherein: said second passage has a fixed diameter measured in the traverse direction; and said third passage has a fixed diameter measured in the traverse direction.
Claim 8
Dependent Claim
66 words
A cooling system as claimed in claim 1, wherein: a diameter of said second passage obtained on an upstream side thereof and measured in the traverse direction is larger than that obtained on a downstream side thereof; and a diameter of said third passage obtained on an upstream side thereof and measured in the traverse direction is larger than that obtained on a downstream side thereof.
Claim 9
Dependent Claim
43 words
A cooling system as claimed in claim 1, wherein: said second passage has a substantially triangular longitudinal-sectional area taken along a first line running in the traverse direction; and said third passage has a substantially triangular longitudinal-sectional area taken along the first line.
Claim 10
Dependent Claim
43 words
A cooling system as claimed in claim 8, wherein: said second passage has a substantially rectangular longitudinal-sectional area taken along a second line perpendicular to the first line; and said third passage has a substantially rectangular longitudinal-sectional area taken along the second line.
Claim 11
Dependent Claim
44 words
A cooling system as claimed in claim 1, wherein: said second passage has a diameter which stepwise decreases in the axial direction of the cylinder liner; and said third passage has a diameter which stepwise decreases in the axial direction of the cylinder liner.
Claim 12
Dependent Claim
62 words
A cooling system as claimed in claim 10, wherein: a diameter of said second passage measured in the traverse direction decreases stepwise from an upstream side of said second passage to a downstream side thereof; and a diameter of said third passage measured in the traverse direction decreases stepwise from an upstream side of said third passage to a downstream side thereof.
Claim 13
Dependent Claim
38 words
A cooling system as claimed in claim 1, wherein: said second passage has an approximately fixed traverse-sectional area at a downstream portion thereof; and said third passage has an approximately fixed traverse-sectional area at an upstream portion thereof.
Claim 14
Dependent Claim
29 words
A cooling system as claimed in claim 1, wherein said second and third passages are fastened to upper portions of the cylinder liner and are arranged in a line.
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) | 1996-08-09 | 1997-02-08 | 1997-08-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2000-08-09 | 2001-02-08 | 2001-08-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2004-08-09 | 2005-02-08 | 2005-08-10 | $7700.00 | Window Closed / Lapsed |