US6233934B1
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for controlling a variable geometry turbocharger
Assignee: Detroit Diesel Corp
•
Filing: 2000-06-29
•
Granted: 2001-05-22
•
Expires: 2020-06-29
Abstract
Abstract A system for controlling a vehicle having an internal combustion engine and a variable geometry turbocharger includes a turbocharger sensor having an output indicative of a current turbocharger geometry Turbocharger geometry is varied by a controllable actuator. Control logic determines a desired turbocharger geometry based on the current engine conditions. Control logic determines an error signal by comparing the current turbocharger geometry to the desired turbocharger geometry. The actuator is controlled based on the error signal to change the current turbocharger geometry so as to track the desired turbocharger geometry.
Inventors
- 👤 Peter D. Church
- 👤 Christopher M. Rieflin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 14:25
CPC Classifications
F; F02; F02D; F02D41/00; F02D41/0002; F02D41/0007; F02B; F02B37/00; F02B37/12; F02B37/24; F02D41/02; F02D41/04; F02D41/10; F02D41/107; F02D41/14; F02D41/1401; F02D2041/1409; F02D2200/00; F02D2200/02; F02D2200/10; F02D2200/1002; F02D2200/1012; F02D41/06; F02D41/062; F02D41/08; F02D41/24; F02D41/2406; F02D41/2409; F02D41/2422; Y; Y02; Y02T; Y02T10/00; Y02T10/10; Y02T10/12
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
118 words
A method for controlling a vehicle having an internal combustion engine, a plurality of engine sensors indicative of current engine conditions, and a variable geometry turbocharger in which geometry is varied by a controllable actuator, the method comprising: determining a current turbocharger geometry based on an output of a turbocharger sensor; determining an engine speed: determining an engine torque demand: determining a desired turbocharger geometry based on the current engine conditions including the engine speed and the engine torque demand; determining an error signal by comparing the current turbocharger geometry to the desired turbocharger geometry; and controlling the actuator based on the error signal to change the current turbocharger geometry so as to track the desired turbocharger geometry.
Claim 2
Independent Claim
118 words
A method for controlling a vehicle having an internal combustion engine, a plurality of engine sensors indicative of current engine conditions, and a variable geometry turbocharger in which geometry is varied by a controllable actuator, the method comprising: determining a current turbocharger geometry based on an output of a turbocharger sensor; determining an engine speed: determining an engine torque demand: determining a desired turbocharger geometry based on the current engine conditions including the engine speed and the engine torque demand; determining an error signal by comparing the current turbocharger geometry to the desired turbocharger geometry; and controlling the actuator based on the error signal to change the current turbocharger geometry so as to track the desired turbocharger geometry.
Claim 3
Dependent Claim
44 words
The method of claim 1 wherein controlling the actuator further comprises: determining at least one control term; determining a modulated signal based on the at least one control term and the error signal; and applying the modulated signal to an input of the actuator.
Claim 4
Dependent Claim
62 words
The method of claim 1 wherein controlling the actuator further comprises: determining an action signal based on the error signal, when error signal magnitude exceeds an action threshold value; determining at least one control term; determining a modulated signal based on the at least one control term and the action signal; and applying the modulated signal to an input of the actuator.
Claim 5
Dependent Claim
70 words
The method of claim 1 wherein determining a desired turbocharger geometry further comprises: selecting an engine operating mode from the group consisting of a normal mode and at least one special mode based on the current engine conditions; determining a desired turbocharger geometry when the engine operating mode is the normal mode; and determining a desired turbocharger geometry when the engine operating mode is the at least one special mode.
Claim 6
Independent Claim
58 words
A method for controlling an engine having a variable geometry turbocharger, the method comprising: determining a current turbocharger geometry; determining an engine speed; determining an engine torque demand; determining a desired turbocharger geometry based on the engine speed and the engine torque demand; and controlling turbocharger geometry based on the desired turbocharger geometry and the current turbocharger geometry.
Claim 7
Independent Claim
58 words
A method for controlling an engine having a variable geometry turbocharger, the method comprising: determining a current turbocharger geometry; determining an engine speed; determining an engine torque demand; determining a desired turbocharger geometry based on the engine speed and the engine torque demand; and controlling turbocharger geometry based on the desired turbocharger geometry and the current turbocharger geometry.
References Cited (Backward Citations)
US4075849A
Cited
US4203296A
Cited
US4292806A
Cited
US4428199A
Cited
DE3005108A1
Cited
US4489557A
Cited
US4442672A
Cited
US4467607A
Cited
US4397285A
Cited
US4779423A
Cited
US4697421A
Cited
US4679398A
Cited
US4680933A
Cited
US4741163A
Cited
US4745755A
Cited
US4671068A
Cited
US4848086A
Cited
US4953110A
Cited
US5069194A
Cited
US5231830A
Cited
US5148364A
Cited
US5261236A
Cited
US5123246A
Cited
US5186081A
Cited
US5442918A
Cited
US5445128A
Cited
US5477827A
Cited
US5622053A
Cited
US5791145A
Cited
US5769052A
Cited
US5709192A
Cited
US5867986A
Cited
WO1997045633A1
Cited
US5771867A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2004-05-21 | 2004-11-20 | 2005-05-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2008-05-21 | 2008-11-20 | 2009-05-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2012-05-21 | 2012-11-20 | 2013-05-22 | $7700.00 | Window Closed / Lapsed |