US4566271A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Engine systems
Assignee: ZF International UK Ltd
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Filing: 1983-11-14
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Granted: 1986-01-28
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Expires: 2003-11-14
Abstract
Abstract An engine system for a road vehicle includes an engine having an exhaust manifold which is coupled to an exhaust gas treatment device. A device is provided to deliver vaporized fuel or to burn fuel in the air inlet manifold to increase the level of noxious gas in the engine exhaust. In this case the treatment device is of the catalytic variety and the increase in the noxious gas content causes an increase in the temperature of the active mass of the treatment device resulting in self cleaning. For a non-catalytic treatment device a burner is disposed in the exhaust manifold.
Inventors
- 👤 Geoffrey R. French
- 👤 Pierre H. Peltret
- 👤 Brian J. Chalke
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 22:34
CPC Classifications
F; F01; F01N; F01N3/00; F01N3/02; F01N3/021; F01N3/023; F01N3/025; F01N3/0253; F01N3/0256; F01N3/08; F01N3/10; F01N3/18; F01N3/20; F01N3/2006; F01N3/2033; F01N3/24; F01N3/28; F01N3/2882; F01N2250/00; F01N2250/02; F01N2390/00; F01N2390/02; F01N2430/00; F01N2430/06; Y; Y02; Y02A; Y02A50/00; Y02A50/20; Y02T; Y02T10/00; Y02T10/10; Y02T10/12
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
138 words
An engine system for a road vehicle comprising an internal combustion engine having an exhaust manifold connected to an exhaust system of the vehicle by way of a treatment device which acts to purify the exhaust gas leaving the engine, a heating device operative to cause an increase in the temperature within said treatment device said treatment device being self cleaning when the exhaust gas temperature is above a predetermined value, the system including a control system responsive to engine speed and vehicle speed and arranged to cause operation of said heating device when the vehicle speed is above a predetermined value and the engine speed is below a predetermined value such that the engine exhaust gas temperature is below said predetermined value, and when the engine speed has been below said predetermined value for a specified period.
Claim 2
Dependent Claim
138 words
An engine system for a road vehicle comprising an internal combustion engine having an exhaust manifold connected to an exhaust system of the vehicle by way of a treatment device which acts to purify the exhaust gas leaving the engine, a heating device operative to cause an increase in the temperature within said treatment device said treatment device being self cleaning when the exhaust gas temperature is above a predetermined value, the system including a control system responsive to engine speed and vehicle speed and arranged to cause operation of said heating device when the vehicle speed is above a predetermined value and the engine speed is below a predetermined value such that the engine exhaust gas temperature is below said predetermined value, and when the engine speed has been below said predetermined value for a specified period.
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) | 1989-01-27 | 1989-07-29 | 1990-01-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-01-27 | 1993-07-29 | 1994-01-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-01-27 | 1997-07-29 | 1998-01-28 | $7700.00 | Window Closed / Lapsed |