US6526751B1
Expired / Lapsed
US
⏱️ 0.0 years remaining
Integrated turbocharger ejector intercooler with partial isothermal compression
Assignee: Caterpillar Inc
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Filing: 2001-12-17
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Granted: 2003-03-04
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Expires: 2021-12-17
Abstract
Abstract An integrated cooling system for a turbocharger, suitable for an internal combustion engine. A cooling air shroud includes a cooling air inlet and a cooling air outlet. A flow inducer is associated with the cooling air outlet to draw air into the cooling air shroud, and pass the cooling air in heat exchange relationship with compressed air flowing through the turbocharger.
Inventors
- 👤 Mark D. Moeckel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 18:39
CPC Classifications
F; F02; F02C; F02C7/00; F02C7/12; F02C7/16; F02C7/18; F02B; F02B29/00; F02B29/04; F02B29/045; F02B29/0475; F02C6/00; F02C6/04; F02C6/10; F02C6/12; F02C7/14; F02C7/141; F02C7/143; F04; F04D; F04D17/00; F04D17/08; F04D17/10; F04D17/12; F04D17/122; F04D25/00; F04D25/02; F04D25/024; F04D29/00; F04D29/40; F04D29/42; F04D29/44; F04D29/441; F04D29/444; F04D29/58; F04D29/582; F04D29/5826; F02B29/0456; F02B37/00; Y; Y02; Y02T; Y02T10/00; Y02T10/10; Y02T10/12
Claims Analysis
Total Claims: 20
Claim 1
Independent Claim
254 words
An internal combustion engine, comprising: a plurality of combustion cylinders; an exhaust manifold associated with said combustion cylinders; an intake manifold associated with said combustion cylinders; and a turbocharger including: a shaft; a turbine having a turbine casing, a turbine wheel disposed on said shaft in said turbine casing, a turbine inlet and a turbine outlet in said turbine casing associated with said turbine wheel, said turbine inlet connected in fluid flow communication with said exhaust manifold; a compressor section having an inlet and an outlet, said inlet associated with a source of combustion gas, and said outlet associated with said intake manifold; said compressor section including a first compressor casing, a first compressor wheel disposed on said shaft in said first compressor casing, a first compressor inlet and a first compressor outlet in said first compressor casing associated with said first compressor wheel; a second compressor having a second compressor casing, a second compressor wheel mounted on said shaft in said second compressor casing, and a second compressor inlet and second compressor outlet in said second compressor casing associated with said second compressor wheel; an interstage duct connecting said first compressor outlet to said second compressor inlet; and a cooling system having a cooling air shroud defining a cooling air inlet and a cooling air outlet, said cooling air inlet disposed adjacent said first compressor inlet, and a flow inducer associated with said cooling air outlet, said cooling air system disposed in heat exchange relationship with combustion air flowing through said interstage duct.
Claim 2
Dependent Claim
254 words
An internal combustion engine, comprising: a plurality of combustion cylinders; an exhaust manifold associated with said combustion cylinders; an intake manifold associated with said combustion cylinders; and a turbocharger including: a shaft; a turbine having a turbine casing, a turbine wheel disposed on said shaft in said turbine casing, a turbine inlet and a turbine outlet in said turbine casing associated with said turbine wheel, said turbine inlet connected in fluid flow communication with said exhaust manifold; a compressor section having an inlet and an outlet, said inlet associated with a source of combustion gas, and said outlet associated with said intake manifold; said compressor section including a first compressor casing, a first compressor wheel disposed on said shaft in said first compressor casing, a first compressor inlet and a first compressor outlet in said first compressor casing associated with said first compressor wheel; a second compressor having a second compressor casing, a second compressor wheel mounted on said shaft in said second compressor casing, and a second compressor inlet and second compressor outlet in said second compressor casing associated with said second compressor wheel; an interstage duct connecting said first compressor outlet to said second compressor inlet; and a cooling system having a cooling air shroud defining a cooling air inlet and a cooling air outlet, said cooling air inlet disposed adjacent said first compressor inlet, and a flow inducer associated with said cooling air outlet, said cooling air system disposed in heat exchange relationship with combustion air flowing through said interstage duct.
Claim 3
Dependent Claim
46 words
The internal combustion engine of claim 1 , including diffuser vanes associated with said first compressor outlet and with said second compressor outlet and deswirling vanes associated with said second compressor inlet, at least some of said vanes in flow communication with said cooling air system.
Claim 4
Dependent Claim
25 words
The internal combustion engine of claim 1 , said flow inducer including a discharge end of said cooling air outlet disposed in said turbine outlet.
Claim 5
Dependent Claim
29 words
The internal combustion engine of claim 1 , said flow inducer including a bleed line from a high pressure source and an ejector disposed in said cooling air outlet.
Claim 6
Dependent Claim
17 words
The internal combustion engine of claim 4 , said high pressure source being said second compressor outlet.
Claim 7
Dependent Claim
16 words
The internal combustion engine of claim 4 , said high pressure source being said exhaust manifold.
Claim 8
Dependent Claim
183 words
A turbocharger, comprising: a shaft; a turbine including a turbine casing, a turbine wheel mounted on said shaft in said turbine casing and a turbine inlet and a turbine outlet in said turbine casing associated with said turbine wheel; a compressor section including a first compressor having a first compressor casing, a first compressor wheel disposed on said shaft in said first compressor casing, and a first compressor inlet and first compressor outlet in said first compressor casing associated with said first compressor wheel; a second compressor having a second compressor casing, a second compressor wheel mounted on said shaft in said-second compressor casing, and a second compressor inlet and second compressor outlet in said second compressor casing associated with said second compressor wheel; an interstage duct connecting said first compressor outlet to said second compressor inlet; and a cooling system having a cooling air shroud defining a cooling air inlet and a cooling air outlet, and a flow inducer associated with said cooling air outlet, said cooling air system disposed in heat exchange relationship with combustion air flowing through said interstage duct.
Claim 9
Dependent Claim
183 words
A turbocharger, comprising: a shaft; a turbine including a turbine casing, a turbine wheel mounted on said shaft in said turbine casing and a turbine inlet and a turbine outlet in said turbine casing associated with said turbine wheel; a compressor section including a first compressor having a first compressor casing, a first compressor wheel disposed on said shaft in said first compressor casing, and a first compressor inlet and first compressor outlet in said first compressor casing associated with said first compressor wheel; a second compressor having a second compressor casing, a second compressor wheel mounted on said shaft in said-second compressor casing, and a second compressor inlet and second compressor outlet in said second compressor casing associated with said second compressor wheel; an interstage duct connecting said first compressor outlet to said second compressor inlet; and a cooling system having a cooling air shroud defining a cooling air inlet and a cooling air outlet, and a flow inducer associated with said cooling air outlet, said cooling air system disposed in heat exchange relationship with combustion air flowing through said interstage duct.
Claim 10
Dependent Claim
44 words
The turbocharger of claim 7 , including diffuser vanes associated with said first compressor outlet and with said second compressor outlet, and deswirling vanes associated with said second compressor inlet, at least some of said vanes in flow communication with said cooling air shroud.
Claim 11
Dependent Claim
24 words
The turbocharger of claim 7 , said cooling air system disposed in heat exchange relationship with combustion air flowing through said second compressor outlet.
Claim 12
Dependent Claim
23 words
The turbocharger of claim 7 , said flow inducer including a discharge end of said cooling air outlet disposed in said turbine outlet.
Claim 13
Dependent Claim
27 words
The turbocharger of claim 7 , said flow inducer including a bleed line from a high pressure source and an ejector disposed in said cooling air outlet.
Claim 14
Dependent Claim
15 words
The turbocharger of claim 11 , said high pressure source being said second compressor outlet.
Claim 15
Dependent Claim
14 words
The turbocharger of claim 11 , said high pressure source being said exhaust manifold.
Claim 16
Independent Claim
124 words
A method for cooling a turbocharger having a shaft, a turbine wheel operatively disposed on said shaft for rotating said shaft, and a compressor section having a compressor wheel mounted on said shaft and a compressor casing defining an inlet and an outlet, said method comprising steps of: providing a cooling air system; providing a cooling air inlet and a cooling air outlet for said cooling air system; providing a flow inducer associated with said cooling air outlet; and operating said flow inducer and circulating cooling air through said cooling air shroud in heat exchange relationship with compressed gas flowing through said compressor section, including providing a high pressure fluid source; and emitting fluid from said high pressure source into said cooling air outlet.
Claim 17
Independent Claim
124 words
A method for cooling a turbocharger having a shaft, a turbine wheel operatively disposed on said shaft for rotating said shaft, and a compressor section having a compressor wheel mounted on said shaft and a compressor casing defining an inlet and an outlet, said method comprising steps of: providing a cooling air system; providing a cooling air inlet and a cooling air outlet for said cooling air system; providing a flow inducer associated with said cooling air outlet; and operating said flow inducer and circulating cooling air through said cooling air shroud in heat exchange relationship with compressed gas flowing through said compressor section, including providing a high pressure fluid source; and emitting fluid from said high pressure source into said cooling air outlet.
Claim 18
Dependent Claim
21 words
The method of claim 14 , including emitting high pressure combustion air from said compressor section into said cooling air outlet.
Claim 19
Dependent Claim
40 words
The method of claim 14 , including providing a high pressure exhaust gas source and a bleed line from said high pressure exhaust gas source, and emitting high pressure exhaust gas from said bleed line into said cooling air outlet.
Claim 20
Dependent Claim
20 words
The method of claim 14 , including entraining cooling air from said cooling air outlet in a high pressure stream.
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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) | 2006-03-03 | 2006-09-02 | 2007-03-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2010-03-03 | 2010-09-02 | 2011-03-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2014-03-03 | 2014-09-02 | 2015-03-04 | $7700.00 | Window Closed / Lapsed |