US4722248A
Expired / Lapsed
US
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Transmission shift control system
Assignee: Eaton Corp
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Filing: 1986-04-11
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Granted: 1988-02-02
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Expires: 2006-04-11
Abstract
Abstract A vehicular transmission shift control system is provided for effecting automatic shifting between a group of sequentially related forward gear ratios provided by the transmission that includes a logic member (16) operative to receive and process an engine speed signal (22) and a gear ratio position signal (30) and to provide an output control signal (33) to a shift actuator (34) that is operative to enable automatic shifting between the sequentially related forward gear ratios whenever the lowest sequentially related forward gear ratios of the group is manually engaged by an operator of the vehicle.
Inventors
- 👤 Eugene R. Braun
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 15:29
CPC Classifications
B; B60; B60W; B60W10/00; B60W10/04; B60W10/06; B60W10/10; B60W10/11; B60W10/111; B60W30/00; B60W30/18; F; F16; F16H; F16H61/00; F16H61/70; F16H61/702; F16H63/00; F16H63/40; F16H63/44; B60W2300/00; B60W2300/12; B60W2300/125; B60W2510/00; B60W2510/06; B60W2510/0638; B60W2510/10; B60W2510/104; B60W2540/00; B60W2540/14; B60Y; B60Y2200/00; B60Y2200/10; B60Y2200/14; B60Y2200/142; F16H59/00; F16H2059/006; F16H59/02; F16H2059/0221; F16H59/36; F16H59/38; F16H59/42; F16H59/68; F16H59/70; Y; Y10; Y10S; Y10S477/00; Y10S477/908; Y10T; Y10T74/00; Y10T74/19; Y10T74/19167; Y10T74/19219; Y10T74/19251; Y10T74/19256; Y10T74/1926
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
164 words
A shift control system for a vehicular transmission having a plurality of groups of forward gear ratios ranging from a first group including a lowest gear ratio to a highest group including a highest gear ratio with each of said groups having a lowest gear ratio manually selectable by an operator and with at least said highest group including sequentially related higher gear ratios, said transmission including actuator means enabling automatic shifting between the sequentially related gear ratios of at least said highest group, and said control system including means for sensing at least when the lowest sequentially related gear ratio of said highest group is manually selected by the operator and operable to enable the actuator means to effect automatic shifting between the sequentially related gear ratios within said highest group when the lowest sequentially related gear ratio within said highest group is manually selected by the operator, all of the gear ratios of said first group requiring manual selection by the operator.
Claim 2
Dependent Claim
164 words
A shift control system for a vehicular transmission having a plurality of groups of forward gear ratios ranging from a first group including a lowest gear ratio to a highest group including a highest gear ratio with each of said groups having a lowest gear ratio manually selectable by an operator and with at least said highest group including sequentially related higher gear ratios, said transmission including actuator means enabling automatic shifting between the sequentially related gear ratios of at least said highest group, and said control system including means for sensing at least when the lowest sequentially related gear ratio of said highest group is manually selected by the operator and operable to enable the actuator means to effect automatic shifting between the sequentially related gear ratios within said highest group when the lowest sequentially related gear ratio within said highest group is manually selected by the operator, all of the gear ratios of said first group requiring manual selection by the operator.
Claim 3
Dependent Claim
22 words
The control system of claim 1 wherein the transmission is a compound transmission comprising a main transmission coupled with an auxiliary transmission.
Claim 4
Dependent Claim
32 words
The control system of claim 1 including means for rendering said automatic shifting means inoperative and enabling manual shifting amongst all of the transmission gear ratios upon the occurrence of an event.
Claim 5
Dependent Claim
19 words
The control system of claim 3 wherein the event is a signal provided said control system by the operator.
Claim 6
Dependent Claim
23 words
The control system of claim 4 wherein means are included for assuring the operator that the automatic shifting means has been rendered inoperable.
Claim 7
Dependent Claim
17 words
The control system of claims 3 or 4 including means for providing a record of the event.
Claim 8
Dependent Claim
30 words
The control system of claim 1 including means for limiting engine speed at least for the speed range provided by the highest sequentially related gear ratio within said highest group.
Claim 9
Dependent Claim
36 words
The control system of claim 1 including cruise control means operative to control vehicular speed about a selected value at least within the speed range provided by said sequentially related gear ratios within said highest group.
Claim 10
Dependent Claim
11 words
A vehicular transmission controlled by the control system of claim 1.
Claim 11
Dependent Claim
167 words
A shift control system for a vehicular transmission having a plurality of groups of forward gear ratios ranging from a first group including a lowest gear ratio to a highest group including a highest gear ratio with each of said groups having a gear ratio manually selectable by an operator and with at least said highest group including a plurality of sequentially related highest gear ratios, said transmission including actuator means enabling automatic shifting between the highest sequentially related gear ratios of at least said highest group, and said control system including means for sensing when one of the sequentially related highest gear ratios of said highest group is manually selected by the operator and operable to enable the actuator means to effect automatic shifting between the sequentially related highest gear ratios within said highest group when one of the sequentially related highest gear ratios within said group is manually selected by the operator, the gear ratios of said first group requiring manual selection by the operator.
Claim 12
Dependent Claim
167 words
A shift control system for a vehicular transmission having a plurality of groups of forward gear ratios ranging from a first group including a lowest gear ratio to a highest group including a highest gear ratio with each of said groups having a gear ratio manually selectable by an operator and with at least said highest group including a plurality of sequentially related highest gear ratios, said transmission including actuator means enabling automatic shifting between the highest sequentially related gear ratios of at least said highest group, and said control system including means for sensing when one of the sequentially related highest gear ratios of said highest group is manually selected by the operator and operable to enable the actuator means to effect automatic shifting between the sequentially related highest gear ratios within said highest group when one of the sequentially related highest gear ratios within said group is manually selected by the operator, the gear ratios of said first group requiring manual selection by the operator.
Claim 13
Dependent Claim
71 words
The control system of claim 10 wherein said vehicular transmission is a compound transmission having a main section connected in series with an auxiliary section including splitter gearing, said manual selection of one of the sequentially related highest gear ratios of said highest group comprising a main section gear ratio change and said automatic shifting between the highest sequentially related gear ratios within said highest group comprising only auxiliary section shifting.
Claim 14
Dependent Claim
11 words
A vehicular transmission controlled by the control system of claim 11.
Claim 15
Dependent Claim
24 words
The control system of claim 11 wherein the gear ratios of all but the highest group require manual selection and engagement by the operator.
Claim 16
Dependent Claim
20 words
The control system of claim 11 wherein the gear ratios of the first group require manual engagement by the operator.
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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) | 1991-02-01 | 1991-08-03 | 1992-02-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-02-01 | 1995-08-03 | 1996-02-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-02-01 | 1999-08-03 | 2000-02-02 | $7700.00 | Window Closed / Lapsed |