US5964207A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Crankcase venting system for an internal combustion engine
Assignee: Mercedes Benz Group AG
•
Filing: 1998-03-10
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Granted: 1999-10-12
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Expires: 2018-03-10
Abstract
Abstract In a crankcase venting system for an internal combustion engine having an engine intake duct including a throttle valve, a partial load venting line extending from the engine to the intake duct downstream of the throttle valve and including a vent line throttle and a full load venting line connected to the engine and leading to the intake duct upstream of the throttle valve, an aspiration line extends between the intake duct upstream of the throttle valve and the partial load venting line for controlling the vacuum generated in the partial load venting line.
Inventors
- 👤 Roland Clauss
- 👤 Georg Leipner
- 👤 Willy Treyz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 15:59
CPC Classifications
F; F01; F01M; F01M13/00; F01M13/04; F02; F02M; F02M25/00; F02M25/06; F01M13/02; F01M13/021; F01M13/022; Y; Y02; Y02T; Y02T10/00; Y02T10/10; Y02T10/12
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
120 words
A crankcase venting system for an internal combustion engine having an engine intake duct including a throttle valve, a partial load venting line extending from said engine to said intake duct downstream of said throttle valve and including a vent line throttle, a full load venting line extending from said engine and leading to said intake duct upstream of said throttle valve, and an aspiration line extending between said intake duct upstream of said throttle valve and leading to said partial load venting line, said aspiration line including an aspiration line throttle for controlling the aspiration air flow to said partial load venting line so as to prevent the development of an excessive vacuum in said partial load venting line.
Claim 2
Dependent Claim
120 words
A crankcase venting system for an internal combustion engine having an engine intake duct including a throttle valve, a partial load venting line extending from said engine to said intake duct downstream of said throttle valve and including a vent line throttle, a full load venting line extending from said engine and leading to said intake duct upstream of said throttle valve, and an aspiration line extending between said intake duct upstream of said throttle valve and leading to said partial load venting line, said aspiration line including an aspiration line throttle for controlling the aspiration air flow to said partial load venting line so as to prevent the development of an excessive vacuum in said partial load venting line.
Claim 3
Dependent Claim
42 words
A crankcase venting system according to claim 1, wherein said aspiration line is connected to said full load venting line and is connected to said partial load venting line downstream of said vent line throttle disposed in said partial load vent line.
Claim 4
Dependent Claim
17 words
A crankcase venting system according to claim 1, wherein said venting lines each include an oil separator.
Claim 5
Dependent Claim
28 words
A crankcase venting system according to claim 1, wherein said throttles are disposed in warm areas of said engine so that ice formation in the throttles is prevented.
References Cited (Backward Citations)
US4901703A
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US4834028A
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US5027783A
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US5205265A
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US5429101A
Cited
US5456239A
Cited
US5878731A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2002-10-11 | 2003-04-12 | 2003-10-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2006-10-11 | 2007-04-12 | 2007-10-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2010-10-11 | 2011-04-12 | 2011-10-12 | $7700.00 | Window Closed / Lapsed |