US4932372A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus and method for retarding a turbocharged engine
Assignee: Jenara Enterprises Ltd
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Filing: 1989-07-18
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Granted: 1990-06-12
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Expires: 2009-07-18
Abstract
Abstract The invention includes an apparatus for retarding a turbocharged engine. There is a mechanism, such as a master and slave cylinder arrangement, for cracking open each exhaust valve of each cylinder of the engine near top dead center of each compression stroke. There is also provision for increasing the pressure of gases in the exhaust manifold sufficiently to open exhaust valves of other cylinders on the intake stroke after each exhaust valve on the compression stroke is so opened. The provision for increasing the pressure of gases in the exhaust manifold includes a device for diverting the exhaust gases to a restricted portion of the turbine nozzle, thereby increasing the pressure of gases directed onto the turbine blades and the pressure in the exhaust manifold.
Inventors
- 👤 Vincent A. Meneely
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 14:20
CPC Classifications
F; F01; F01L; F01L13/00; F01L13/06; F01L13/065; F02; F02D; F02D9/00; F02D9/04; F02D9/06
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
104 words
A method for retarding an engine which is provided with a compression release brake and is turbocharged by an exhaust driven turbine, comprising the steps of: opening exhaust valves of each cylinder of the engine near top dead centre on each compression stroke; and increasing the pressure of gases in the exhaust manifold sufficiently to open the exhaust valves of cylinders of the engine on each intake stroke during ion of the compression release brake by diverting the exhaust gases to a restricted portion of the turbine only, thereby increasing the pressure of exhaust gases acting on the turbine and in the exhaust manifold.
Claim 2
Independent Claim
104 words
A method for retarding an engine which is provided with a compression release brake and is turbocharged by an exhaust driven turbine, comprising the steps of: opening exhaust valves of each cylinder of the engine near top dead centre on each compression stroke; and increasing the pressure of gases in the exhaust manifold sufficiently to open the exhaust valves of cylinders of the engine on each intake stroke during ion of the compression release brake by diverting the exhaust gases to a restricted portion of the turbine only, thereby increasing the pressure of exhaust gases acting on the turbine and in the exhaust manifold.
Claim 3
Dependent Claim
32 words
A method as claimed in claim 1, wherein each exhaust valve of cylinders on the intake stroke is opened while an exhaust valve of a cylinder on the compression stroke is open.
Claim 4
Dependent Claim
28 words
A method as claimed in claim 1, wherein the pressure of exhaust gases is further increased by retarding the opening of each exhaust valve on each compression stroke.
Claim 5
Independent Claim
110 words
An apparatus for retarding a multi-cylinder, turbocharged four stroke engine having a compression release brake, intake valves, exhaust valves communicating with a common exhaust manifold, and an exhaust-powered turbine, the apparatus comprising: means for opening exhaust valves near top dead center on each compression stroke; and means for increasing the pressure of gases in the exhaust manifold sufficiently to open said exhaust valves on each intake stroke during operation of the compression release brake, the means for increasing pressure including means for diverting the exhaust gases to a restricted portion of the turbine only, thereby increasing the pressure of exhaust gases acting on the turbine and in the exhaust manifold.
Claim 6
Independent Claim
110 words
An apparatus for retarding a multi-cylinder, turbocharged four stroke engine having a compression release brake, intake valves, exhaust valves communicating with a common exhaust manifold, and an exhaust-powered turbine, the apparatus comprising: means for opening exhaust valves near top dead center on each compression stroke; and means for increasing the pressure of gases in the exhaust manifold sufficiently to open said exhaust valves on each intake stroke during operation of the compression release brake, the means for increasing pressure including means for diverting the exhaust gases to a restricted portion of the turbine only, thereby increasing the pressure of exhaust gases acting on the turbine and in the exhaust manifold.
Claim 7
Dependent Claim
16 words
An apparatus as claimed in claim 4, wherein the means for restricting includes a diverter valve.
Claim 8
Dependent Claim
31 words
An apparatus as claimed in claim 5, wherein the turbine is a double entry turbine, the diverter valve being positioned to divert all exhaust gases into one portion of the turbine.
Claim 9
Dependent Claim
27 words
An apparatus as claimed in claim 4, wherein the means for increasing pressure includes means for retarding the opening of the exhaust valves on each compression stroke.
Claim 10
Dependent Claim
19 words
An apparatus as claimed in claim 4, wherein the means for diverting including an adjustable nozzle for the turbine.
Claim 11
Dependent Claim
117 words
In combination: a multi-cylinder, four stroke internal combustion engine being turbocharged with an exhaust-driven turbine, and having intake valves and exhaust valves communicating with a common exhaust manifold; and an apparatus for retarding the engine including means for opening the exhaust valves near top dead center on each compression stroke; and means for increasing the pressure of gases in the exhaust manifold sufficiently to open the exhaust valves on the intake stroke after the exhaust valves are opened on each compression stroke, the means for increasing including means for diverting the exhaust gases to a restricted portion of the turbine only, thereby increasing the pressure of exhaust gases acting on the turbine and in the exhaust manifold.
Claim 12
Dependent Claim
117 words
In combination: a multi-cylinder, four stroke internal combustion engine being turbocharged with an exhaust-driven turbine, and having intake valves and exhaust valves communicating with a common exhaust manifold; and an apparatus for retarding the engine including means for opening the exhaust valves near top dead center on each compression stroke; and means for increasing the pressure of gases in the exhaust manifold sufficiently to open the exhaust valves on the intake stroke after the exhaust valves are opened on each compression stroke, the means for increasing including means for diverting the exhaust gases to a restricted portion of the turbine only, thereby increasing the pressure of exhaust gases acting on the turbine and in the exhaust manifold.
Claim 13
Dependent Claim
15 words
A combination as claimed in claim 9, wherein the means for diverting includes a valve.
Claim 14
Dependent Claim
43 words
A combination as claimed in claim 9, wherein the means for increasing further includes means for retarding opening of said each exhaust valve near top dead centre of said each compression stroke to increase the pressure of gases released from the first cylinder.
Claim 15
Dependent Claim
92 words
A combination as claimed in claim 11, wherein the valves are operated by push tubes, the means for opening each said exhaust valve including a slave cylinder having a slave piston operatively contacting said each exhaust valve, a master cylinder having a master piston for operatively contacting one said push tube, and an hydraulic conduit between the master cylinder and the slave cylinder, the means for retarding including an a gap between the one push tube and the master piston prior to operation of the master cylinder by the one push tube.
Claim 16
Dependent Claim
19 words
A combination as claimed in claim 9, wherein the means for diverting includes an adjustable nozzle for the turbine.
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) | 1993-06-11 | 1993-12-11 | 1994-06-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-06-11 | 1997-12-11 | 1998-06-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-06-11 | 2001-12-11 | 2002-06-12 | $7700.00 | Window Closed / Lapsed |