US7757657B2
Active / In Force
US
⏱️ 1.9 years remaining
Dual active fuel management sequencing
Assignee: GM Global Technology Operations LLC
•
Filing: 2008-09-23
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Granted: 2010-07-20
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Expires: 2028-09-23
Abstract
Abstract A system includes a cylinder selection module and a valve deactivation module. The cylinder selection module selects cylinders of an engine for active fuel management. The valve deactivation module deactivates intake valves of selected cylinders of the engine before deactivating exhaust valves of the selected cylinders when an engine speed of the engine is less than or equal to a predetermined speed.
Inventors
- 👤 William C. Albertson
- 👤 Mark Stabinsky
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 04:29
CPC Classifications
F; F02; F02D; F02D13/00; F02D13/02; F02D13/06; F02D17/00; F02D17/02; Y; Y02; Y02T; Y02T10/00; Y02T10/10; Y02T10/12
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
114 words
A system comprising: a cylinder selection module that selects cylinders of an engine for active fuel management; a valve deactivation module that deactivates intake valves of selected cylinders of said engine before deactivating exhaust valves of said selected cylinders when an engine speed of said engine is less than or equal to a predetermined speed, a torque request monitoring module that monitors a requested torque; and a valve activation module that activates said exhaust valves deactivated by said deactivation module before activating said intake valves deactivated by said deactivation module when said requested torque is greater than or equal to said predetermined torque and when said engine speed is greater than said predetermined speed.
Claim 2
Independent Claim
114 words
A system comprising: a cylinder selection module that selects cylinders of an engine for active fuel management; a valve deactivation module that deactivates intake valves of selected cylinders of said engine before deactivating exhaust valves of said selected cylinders when an engine speed of said engine is less than or equal to a predetermined speed, a torque request monitoring module that monitors a requested torque; and a valve activation module that activates said exhaust valves deactivated by said deactivation module before activating said intake valves deactivated by said deactivation module when said requested torque is greater than or equal to said predetermined torque and when said engine speed is greater than said predetermined speed.
Claim 3
Dependent Claim
16 words
The system of claim 1 wherein said predetermined speed includes a speed of 1200 revolutions-per-minute (RPM).
Claim 4
Dependent Claim
56 words
The system of claim 1 wherein: the valve activation module activates said intake valves deactivated by said deactivation module before activating said exhaust valves deactivated by said deactivation module when said requested torque is greater than or equal to a predetermined torque and when said engine speed is less than or equal to said predetermined speed.
Claim 5
Dependent Claim
29 words
The system of claim 1 wherein said valve deactivation module deactivates said exhaust valves before deactivating said intake valves when said engine speed is greater than said predetermined speed.
Claim 6
Dependent Claim
37 words
The system of claim 1 further comprising an accelerator input module that measures a rate of change of an accelerator pedal and that outputs said requested torque based on said rate of change of said accelerator pedal.
Claim 7
Dependent Claim
44 words
The system of claim 1 further comprising a speed monitoring module that monitors said engine speed, that indicates when said engine speed is less than or equal to said predetermined speed, and that indicates when said engine speed is greater than said predetermined speed.
Claim 8
Dependent Claim
15 words
The system of claim 1 further comprising a speed sensor that senses said engine speed.
Claim 9
Independent Claim
89 words
A method comprising: selecting cylinders of an engine for active fuel management; deactivating intake valves of selected cylinders of said engine before deactivating exhaust valves of said selected cylinders when an engine speed of said engine is less than or equal to a predetermined speed; monitoring a requested torque; and activating deactivated ones of said exhaust valves before activating deactivated ones of said intake valves when said requested torque is greater than or equal to said predetermined torque and when said engine speed is greater than said predetermined speed.
Claim 10
Independent Claim
89 words
A method comprising: selecting cylinders of an engine for active fuel management; deactivating intake valves of selected cylinders of said engine before deactivating exhaust valves of said selected cylinders when an engine speed of said engine is less than or equal to a predetermined speed; monitoring a requested torque; and activating deactivated ones of said exhaust valves before activating deactivated ones of said intake valves when said requested torque is greater than or equal to said predetermined torque and when said engine speed is greater than said predetermined speed.
Claim 11
Dependent Claim
18 words
The method of claim 8 further comprising selecting a speed of 1200 revolutions-per-minute (RPM) as said predetermined speed.
Claim 12
Dependent Claim
49 words
The method of claim 8 further comprising: activating deactivated ones of said intake valves before activating deactivated ones of said exhaust valves when said requested torque is greater than or equal to a predetermined torque and when said engine speed is less than or equal to said predetermined speed.
Claim 13
Dependent Claim
26 words
The method of claim 8 further comprising deactivating said exhaust valves before deactivating said intake valves when said engine speed is greater than said predetermined speed.
Claim 14
Dependent Claim
31 words
The method of claim 8 further comprising: measuring a rate of change of an accelerator pedal; and outputting said requested torque based on said rate of change of said accelerator pedal.
Claim 15
Dependent Claim
41 words
The method of claim 8 further comprising: sensing said engine speed; monitoring said engine speed; indicating when said engine speed is less than or equal to said predetermined speed; and indicating when said engine speed is greater than said predetermined speed.
References Cited (Backward Citations)
US4386590A
Cited
US4173209A
Cited
US4175534A
Cited
US4133332A
Cited
US5408966A
Cited
US5490486A
Cited
US6752121B2
Cited
US20070215106A1
Cited
US20090000579A1
Cited
US20090066337A1
Cited
US20090107432A1
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2013-07-19 | 2014-01-18 | 2014-07-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2017-07-19 | 2018-01-18 | 2018-07-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2021-07-19 | 2022-01-18 | 2022-07-20 | $7700.00 | Window Closed / Lapsed |