US4893589A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Water cooling system for a supercharged internal-combustion engine
Assignee: BBC Brown Boveri AG Switzerland
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Filing: 1988-07-14
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Granted: 1990-01-16
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Expires: 2008-07-14
Abstract
Abstract In a water cooling system for an internal-combustion engine supercharger by means of mechanical supercharger, main cooling circuit for the engine (1) and secondary cooling circuit for the supercharged (9) are operated with the same coolant and are cooled in a joint radiator (2), but in separate compartments, in order to ensre the independence of the respective operating temperatures. An ejector (10), driven by coolant from the main cooling circuit, delivers the secondary medium. The system is suitable in particular for spiral compressors which are provided on the outside with cooling ribs which protrude into externally mounted water chambers.
Inventors
- 👤 Fritz Spinnler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 08:15
CPC Classifications
F; F02; F02B; F02B39/00; F02B39/005; F01; F01P; F01P3/00; F01P3/20; F01P7/00; F01P7/14; F01P7/16; F01P7/165; F01P2060/00; F01P2060/12; F02B1/00; F02B1/02; F02B1/04
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
103 words
A water cooling system for an internal-combustion engine supercharged by means of a mechanical supercharger, comprising: a main cooling circuit including a water pump, a radiator, and an internal-combustion engine; said radiator including a compartmentalized part; a secondary cooling circuit for the supercharger, which secondary cooling circuit is operated with the same working medium of the main cooling circuit; means for driving the working medium in the secondary cooling circuit, which working medium in the secondary cooling circuit is fed from the main cooling circuit; whereby said working medium in the secondary cooling circuit is cooled in the compartmentalized part of the radiator.
Claim 2
Dependent Claim
103 words
A water cooling system for an internal-combustion engine supercharged by means of a mechanical supercharger, comprising: a main cooling circuit including a water pump, a radiator, and an internal-combustion engine; said radiator including a compartmentalized part; a secondary cooling circuit for the supercharger, which secondary cooling circuit is operated with the same working medium of the main cooling circuit; means for driving the working medium in the secondary cooling circuit, which working medium in the secondary cooling circuit is fed from the main cooling circuit; whereby said working medium in the secondary cooling circuit is cooled in the compartmentalized part of the radiator.
Claim 3
Dependent Claim
34 words
A water cooling system as claimed in claim 1, wherein the working medium in the secondary circuit is fed from a portion of the main cooling circuit that is downstream of the water pump.
Claim 4
Dependent Claim
22 words
A water cooling system as claimed in claim 1, wherein the radiator is a downdraft radiator having upper and lower radiator tanks.
Claim 5
Dependent Claim
26 words
A water cooling system as claimed in claim 3, wherein the radiator includes partitions in the upper and lower radiator tanks for defining the compartmentalized part.
Claim 6
Dependent Claim
23 words
A water cooling system as claimed in claim 4, wherein a compensating orifice is provided in the partition of the lower radiator tank.
Claim 7
Dependent Claim
30 words
A water cooling system as claimed in claim 1, further comprising a bypass line having a controlled thermostat valve therein arranged in the secondary cooling circuit parallel to the radiator.
Claim 8
Dependent Claim
16 words
A water cooling system as claimed in claim 1, wherein the driving means is an ejector.
Claim 9
Dependent Claim
52 words
A water cooling system as claimed in claim 7, further comprising a compensating line leading from the secondary cooling circuit, upstream of the supercharger, to the radiator, via which compensation line working medium equivalent to the quantity required for the drive of the ejector, may be returned to the main cooling circuit.
Claim 10
Dependent Claim
62 words
A water cooling system as claimed in claim 1, wherein the supercharger is a machine of the spiral type and which comprises: a central drive shaft; water chambers attached on both front ends of the supercharger; side walls bounding delivery spaces of the supercharger; and ribs provided on the outer surfaces of the side walls, said ribs protrude into the water chambers.
Claim 11
Dependent Claim
28 words
A water cooling system as claimed in claim 9, further comprising webs bounding the delivery spaces in the radial direction, wherein the ribs are extensions of the webs.
Claim 12
Dependent Claim
16 words
A water cooling system as claimed in claim 1, wherein the driving means is an ejector.
Claim 13
Dependent Claim
23 words
A water cooling system as claimed in claim 11, wherein a compensating orifice is provided in the partition of the lower radiator tank.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1993-01-15 | 1993-07-17 | 1994-01-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-01-15 | 1997-07-17 | 1998-01-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-01-15 | 2001-07-17 | 2002-01-16 | $7700.00 | Window Closed / Lapsed |