US4913269A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for smoothing skip up-shifts in automatic/semi-automatic mechanical transmission system
Assignee: Eaton Corp
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Filing: 1989-01-03
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Granted: 1990-04-03
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Expires: 2009-01-03
Abstract
Abstract A method for smoothing skip up-shifts in an automated mechanical transmission system (10) without requiring direct sensing of the rotational speed of the engine (14) is provided. The method involves delaying re-engagement of the master clutch (16) after engagement of a selected transmission ratio (E) during a skip up-shift by a period of time (T) directly proportional to the number (N) of ratios skipped and/or a function of the identity of the newly engaged ratio.
Inventors
- 👤 Michael W. Dunkley
- 👤 John E. Stainton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 12:39
CPC Classifications
B; B60; B60W; B60W10/00; B60W10/04; B60W10/06; B60W10/10; B60W10/11; B60W30/00; B60W30/18; B60W2710/00; B60W2710/02; B60W2710/021; B60W2710/10; B60W2710/1005
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
188 words
A method for controlling an automated mechanical change gear transmission section (10) comprising a fuel throttle controlled engine (14), a multi-speed change gear mechanical transmission (12), a master friction clutch (16) interposed the engine and the transmission, and a central processing unit (38) for receiving inputs and for processing same according to predetermined logic rules to issue command output signals to non-manually controlled operators including a clutch operator 30 and a transmission operator (34), said command outputs including commands for disengagement of the master friction clutch, and commands for skip up-shifts for engagement of a new transmission ratio (E) displaced from the previously engaged transmission ratio (PE) by N ratios wherein N equals one less than the numerical value of the previously engaged speed ratio (PE) subtracted from the numerical value of the speed ratio to be engaged (E); said method characterized by: sensing engagement of the selected gear ratio (E) in the transmission; delaying re-engagement of the master clutch for a period of time (T) wherein the value of the period of time (T) is a function of a constant (K) multiplied by the value of N.
Claim 2
Independent Claim
188 words
A method for controlling an automated mechanical change gear transmission section (10) comprising a fuel throttle controlled engine (14), a multi-speed change gear mechanical transmission (12), a master friction clutch (16) interposed the engine and the transmission, and a central processing unit (38) for receiving inputs and for processing same according to predetermined logic rules to issue command output signals to non-manually controlled operators including a clutch operator 30 and a transmission operator (34), said command outputs including commands for disengagement of the master friction clutch, and commands for skip up-shifts for engagement of a new transmission ratio (E) displaced from the previously engaged transmission ratio (PE) by N ratios wherein N equals one less than the numerical value of the previously engaged speed ratio (PE) subtracted from the numerical value of the speed ratio to be engaged (E); said method characterized by: sensing engagement of the selected gear ratio (E) in the transmission; delaying re-engagement of the master clutch for a period of time (T) wherein the value of the period of time (T) is a function of a constant (K) multiplied by the value of N.
Claim 3
Dependent Claim
29 words
The method of claim 1 wherein the value of T equals (N*K)+C E where; N=[(E-PE)-1] K=a predetermined constant and C E =a constant particular to the value of E.
Claim 4
Dependent Claim
27 words
The method of claim 1 wherein said automated transmission system additionally includes an input shaft brake (18) responsive to command output signals from said central processing unit.
Claim 5
Dependent Claim
27 words
The method of claim 1 wherein said automated transmission system additionally includes an input shaft brake (18) responsive to command output signals from said central processing unit.
Claim 6
Dependent Claim
27 words
The method of claim 2 wherein said automated transmission system additionally includes an input shaft brake (18) responsive to command output signals from said central processing unit.
Claim 7
Dependent Claim
24 words
The method of claim 1 wherein said automated transmission system does not include sensing means for directly sensing the rotational speed of said engine.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1993-04-02 | 1993-10-02 | 1994-04-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-04-02 | 1997-10-02 | 1998-04-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-04-02 | 2001-10-02 | 2002-04-03 | $7700.00 | Window Closed / Lapsed |