Patent US5385019A successfully refreshed from Google Patents.
US5385019A
Expired / Lapsed
US
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Compression release engine braking methods and apparatus for use with turbocharged engines having intercoolers
Assignee: Jacobs Brake Tech Corp
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Filing: 1994-02-08
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Granted: 1995-01-31
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Expires: 2014-02-08
Abstract
Abstract Increased engine braking is available from a system including an internal combustion engine equipped with a compression release engine brake, a turbocharger, and an intercooler by having the engine inlet air compressed by the turbocharger bypass the intercooler during operation of the compression release engine brake.
Inventors
- 👤 Frank M. Kulig
- 👤 Paul J. Spacek
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 19:20
CPC Classifications
F; F02; F02D; F02D13/00; F02D13/02; F02D13/04; F02B; F02B29/00; F02B29/04; F02B29/0406; F02B29/0418; F02B37/00; F02D23/00; Y; Y02; Y02T; Y02T10/00; Y02T10/10; Y02T10/12
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
95 words
Compression release engine braking apparatus for an internal combustion engine equipped with a turbocharger and an intercooler, the turbocharger compressing the air supplied to an intake manifold of the engine and the intercooler reducing the temperature of the compressed air before it is supplied to the intake manifold, comprising: means for diverting at least some of the air compressed by the turbocharger around the intercooler to the intake manifold to reduce the amount by which the intercooler reduces the temperature of the compressed air supplied to the intake manifold when engine braking is in operation.
Claim 2
Dependent Claim
95 words
Compression release engine braking apparatus for an internal combustion engine equipped with a turbocharger and an intercooler, the turbocharger compressing the air supplied to an intake manifold of the engine and the intercooler reducing the temperature of the compressed air before it is supplied to the intake manifold, comprising: means for diverting at least some of the air compressed by the turbocharger around the intercooler to the intake manifold to reduce the amount by which the intercooler reduces the temperature of the compressed air supplied to the intake manifold when engine braking is in operation.
Claim 3
Dependent Claim
44 words
The apparatus defined in claim 1 wherein said means for diverting comprises: a conduit which bypasses the intercooler between the turbocharger and the intake manifold; a valve for normally closing said conduit; and means for opening said conduit when engine braking is in operation.
Claim 4
Dependent Claim
56 words
The apparatus defined in claim 1 wherein said means for diverting comprises: a conduit which bypasses the intercooler between the turbocharger and the intake manifold; and a diverter valve for substantially closing either said conduit when engine braking is not in operation or the compressed air passageway through the intercooler when engine braking is in operation.
Claim 5
Independent Claim
104 words
The method of operating an internal combustion engine equipped with a compression release engine brake, a turbocharger for compressing the air supplied to an intake manifold of the engine, and an intercooler for reducing the temperature of the compressed air before it is supplied to the intake manifold, said method comprising the step of: reducing the amount by which the intercooler reduces the temperature of the compressed air supplied to the intake manifold during operation of the compression release engine brake by diverting at least some of the air compressed by the turbocharger around the intercooler during operation of the compression release engine brake.
Claim 6
Independent Claim
104 words
The method of operating an internal combustion engine equipped with a compression release engine brake, a turbocharger for compressing the air supplied to an intake manifold of the engine, and an intercooler for reducing the temperature of the compressed air before it is supplied to the intake manifold, said method comprising the step of: reducing the amount by which the intercooler reduces the temperature of the compressed air supplied to the intake manifold during operation of the compression release engine brake by diverting at least some of the air compressed by the turbocharger around the intercooler during operation of the compression release engine brake.
References Cited (Backward Citations)
US3220392A
Cited
US4296605A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1998-01-30 | 1998-08-01 | 1999-01-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2002-01-30 | 2002-08-01 | 2003-01-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2006-01-30 | 2006-08-01 | 2007-01-31 | $7700.00 | Window Closed / Lapsed |