Patent US6058707A successfully refreshed from Google Patents.
US6058707A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of controlling the charge air mass flows of an internal combustion engine including an exhaust gas turbocharger with adjustable turbine geometry
Assignee: Mercedes Benz Group AG
•
Filing: 1998-04-13
•
Granted: 2000-05-09
•
Expires: 2018-04-13
Abstract
Abstract In a method of controlling the charge air mass flow of an internal combustion engine having an exhaust gas turbocharger with adjustable turbine inlet guide vanes during dynamic operation of the engine from one stationary operating state with a given engine power output to another stationary engine operating state with a greater engine power output, the flow guide vanes are first moved to a closing position providing a minimum flow cross-section and, after a certain engine operating parameter reaches a certain control value, the guide vanes are opened at a rate depending on the charge air pressure in the intake duct of the engine to a final opening position corresponding to the other stationary engine operating state.
Inventors
- 👤 Roland Bischoff
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 22:45
CPC Classifications
F; F02; F02D; F02D41/00; F02D41/0002; F02D41/0007; F02B; F02B37/00; F02B37/12; F02B37/24; Y; Y02; Y02T; Y02T10/00; Y02T10/10; Y02T10/12
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
186 words
A method of controlling the charge air mass flow through an intake duct of an internal combustion engine having an exhaust gas turbocharger with adjustable-turbine geometry including guide vanes during dynamic operation of the engine from one stationary operating state with a given engine power output to another stationary engine operating state with a greater engine power output, comprising the steps of: reducing the gas admission flow cross-section of the turbine by moving the turbine flow guide vanes to a closing position to provide a predetermined reduction in the turbine gas admission flow cross-section, determining a charge air pressure p 2S-act in the intake duct of the internal combustion engine, and opening the flow guide vanes from their closed position to a predetermined opening position corresponding to said other stationary engine operating state at a rate which is proportional to the increase of the charge air pressure p 2S-act from an initial charge air pressure (p 2SO ) in the intake duct before the load change to a charge air pressure p 2S-des corresponding to the desired other stationary operating state of the internal combustion engine.
Claim 2
Independent Claim
186 words
A method of controlling the charge air mass flow through an intake duct of an internal combustion engine having an exhaust gas turbocharger with adjustable-turbine geometry including guide vanes during dynamic operation of the engine from one stationary operating state with a given engine power output to another stationary engine operating state with a greater engine power output, comprising the steps of: reducing the gas admission flow cross-section of the turbine by moving the turbine flow guide vanes to a closing position to provide a predetermined reduction in the turbine gas admission flow cross-section, determining a charge air pressure p 2S-act in the intake duct of the internal combustion engine, and opening the flow guide vanes from their closed position to a predetermined opening position corresponding to said other stationary engine operating state at a rate which is proportional to the increase of the charge air pressure p 2S-act from an initial charge air pressure (p 2SO ) in the intake duct before the load change to a charge air pressure p 2S-des corresponding to the desired other stationary operating state of the internal combustion engine.
Claim 3
Dependent Claim
28 words
A method according to claim 1, wherein said guide vanes are held in a closing position until a continuously monitored engine operating parameter reaches a predetermined control value.
Claim 4
Dependent Claim
47 words
A method according to claim 2, wherein as said engine operating parameter an actual air ratio λ of the charge air mass flow and a fuel injection amount is determined for each engine operating cycle and a predetermined limit air ratio is provided as said control value.
Claim 5
Dependent Claim
55 words
A method according to claim 2, wherein as said engine operating parameter a fuel injection amount is assigned to each charge air pressure which fuel injection amount increases with increasing charge air pressure and a predetermined fuel amount corresponding to the desired other stationary operating state of the engine is used as said control value.
Claim 6
Dependent Claim
26 words
A method according to claim 1, wherein said control values are stored in a performance graph and are taken from said performance graph during engine operation.
References Cited (Backward Citations)
JPS6022032A
Cited
JPS61123718A
Cited
JPS61283726A
Cited
US4671068A
Cited
DE3624248A1
Cited
US4928489A
Cited
US5123246A
Cited
EP0747585A2
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2003-05-09 | 2003-11-08 | 2004-05-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2007-05-09 | 2007-11-08 | 2008-05-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2011-05-09 | 2011-11-08 | 2012-05-09 | $7700.00 | Window Closed / Lapsed |