US5406918A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Internal combustion engine
Assignee: Hino Motors Ltd
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Filing: 1993-12-20
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Granted: 1995-04-18
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Expires: 2013-12-20
Abstract
Abstract In addition to an engine-braking master piston, an exhaust-gas-recirculation master piston is provided to pressurize an oil having been supplied to an oil passage and open an exhaust valve in a suction stroke. A directional control valve selectively switches transmission of hydraulic pressures produced by the engine-braking and exhaust-gas-recirculation master pistons so that the exhaust valve adjacent to a top dead center in a compression stroke is opened to discharge the compressed air. Exhaust gas recirculation can be effected while braking action by a braking force produced in the compression stroke is ensured.
Inventors
- 👤 Isao Joko
- 👤 Toshiaki Kakegawa
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 03:52
CPC Classifications
F; F01; F01L; F01L13/00; F01L13/06; F01L13/065; F02; F02M; F02M26/00; F02M26/01; F02B; F02B75/00; F02B75/02; F02B2075/022; F02B2075/027
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
127 words
In an internal combustion engine wherein upon engine braking, an engine-braking master piston for a cylinder is actuated through a rocker arm by a push rod of another cylinder to pressurize an oil having been supplied to an oil passage so that an exhaust valve adjacent to a top dead center in a compression stroke is opened through a slave piston to discharge compressed air through an exhaust port, an improvement which comprises an exhaust-gas-recirculation master piston adapted to be actuated through a rocker arm by a push rod of said another cylinder to open the exhaust valve in a suction stroke, thereby pressurizing said oil, and a directional control valve for selectively switching transmission of hydraulic pressures produced by said master pistons to said oil passage.
Claim 2
Dependent Claim
127 words
In an internal combustion engine wherein upon engine braking, an engine-braking master piston for a cylinder is actuated through a rocker arm by a push rod of another cylinder to pressurize an oil having been supplied to an oil passage so that an exhaust valve adjacent to a top dead center in a compression stroke is opened through a slave piston to discharge compressed air through an exhaust port, an improvement which comprises an exhaust-gas-recirculation master piston adapted to be actuated through a rocker arm by a push rod of said another cylinder to open the exhaust valve in a suction stroke, thereby pressurizing said oil, and a directional control valve for selectively switching transmission of hydraulic pressures produced by said master pistons to said oil passage.
References Cited (Backward Citations)
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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) | 1998-04-17 | 1998-10-17 | 1999-04-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2002-04-17 | 2002-10-17 | 2003-04-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2006-04-17 | 2006-10-17 | 2007-04-18 | $7700.00 | Window Closed / Lapsed |