US4856383A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Coast clutch control for multiple speed automatic transmission
Assignee: Ford Motor Co
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Filing: 1988-06-06
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Granted: 1989-08-15
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Expires: 2008-06-06
Abstract
Abstract A manual valve alternately connects a source of regulated line pressure to a forward drive passage and to a reverse drive passage. A shift valve alternately connects these passages to an input port of a coast clutch valve in accordance with the state of a solenoid-operated valve. A control port of the coast clutch shift valve is pressurized either from a manual valve, when the gear is selected manually by the vehicle operator, or from the source of variable pressure control by operation of a variable force solenoid. In accordance with the control pressure, the coast clutch shift valve either connects its input to a line connected to the coast clutch or vents the input to a drain passage in the shift valve.
Inventors
- 👤 Stanley D. Rosen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 11:16
CPC Classifications
F; F16; F16H; F16H61/00; F16H61/02; F16H61/0202; F16H61/0204; F16H61/0206; F16H61/21; F16H59/00; F16H59/02; F16H59/08; F16H2059/082; F16H2059/083; F16H59/14; F16H59/18; F16H2059/186; F16H61/04; F16H2061/044; F16H61/06; F16H61/065; F16H61/08
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
226 words
A system for controlling the operation of a first friction element, comprising: a source of regulated line fluid pressure; manual valve means moveable among positions selected by an operator for connecting said line pressure source to a first port of the manual valve means and for producing a third control pressure, in accordance with the position of the manual valve means; a first control valve means operated by a solenoid for producing a first control pressure; first shift valve means connected to the first control pressure for connecting the first port of the manual valve means to a first output port of the first shift valve means according to the control of the first control pressure; second control valve means operated by a solenoid for producing a second control pressure; second shift valve means connected to the second control pressure for connecting the first output port of the first shift valve means to the first friction element in accordance with the control of the second control pressure means for directing alternately the third control pressure or the second control pressure to the second shift valve; and the second shift valve means is connected to the output of the directing means for connecting the output port of the first shift valve means to the first friction element in accordance with the control of the direction means output.
Claim 2
Independent Claim
226 words
A system for controlling the operation of a first friction element, comprising: a source of regulated line fluid pressure; manual valve means moveable among positions selected by an operator for connecting said line pressure source to a first port of the manual valve means and for producing a third control pressure, in accordance with the position of the manual valve means; a first control valve means operated by a solenoid for producing a first control pressure; first shift valve means connected to the first control pressure for connecting the first port of the manual valve means to a first output port of the first shift valve means according to the control of the first control pressure; second control valve means operated by a solenoid for producing a second control pressure; second shift valve means connected to the second control pressure for connecting the first output port of the first shift valve means to the first friction element in accordance with the control of the second control pressure means for directing alternately the third control pressure or the second control pressure to the second shift valve; and the second shift valve means is connected to the output of the directing means for connecting the output port of the first shift valve means to the first friction element in accordance with the control of the direction means output.
Claim 3
Dependent Claim
33 words
The system of claim 1 wherein said second shift valve means further includes means for alternately pressurizing and venting the first friction element in accordance with the control of the second control pressure.
Claim 4
Dependent Claim
34 words
The system of claim 1 wherein the second control pressure is high or low pressure whose magnitude varies according to the energized or deenergized state of the solenoid that operates the second control valve.
Claim 5
Dependent Claim
43 words
The system of claim 1 wherein the manual valve means further includes means for connecting said line pressure source to a third control pressure output of said manual valve means when the manual valve means is located at a manually selected gear position.
Claim 6
Dependent Claim
55 words
The system of claim 1 further comprising a second friction element; and wherein the first shift valve means includes a second output port connected to the second friction element and means for connecting the first output port of the manual valve means to said second output port according to control of the first control pressure.
Claim 7
Dependent Claim
33 words
The system of claim 5 wherein the first shift valve means further includes means for alternately pressurizing and venting the second friction element in accordance with the control of the first control pressure.
Claim 8
Independent Claim
156 words
A system for controlling the operation of a first friction element, comprising: a source of regulated line fluid pressure; manual valve means moveable among positions selected by an operator for connecting said line pressure source to a first output port of the manual valve means and for producing concurrently a third control pressure, in accordance with the position of the manual valve means; a first control valve means operated by a solenoid for producing a first control pressure; first shift valve means connected to the first control pressure for connecting the first output port of the manual valve means to a first output port of the first shift valve means according to the control of the first control pressure; second shift valve means connected to the third control pressure for connecting the first output port of the first shift valve means to the first friction element in accordance with the control of the third control pressure.
Claim 9
Independent Claim
156 words
A system for controlling the operation of a first friction element, comprising: a source of regulated line fluid pressure; manual valve means moveable among positions selected by an operator for connecting said line pressure source to a first output port of the manual valve means and for producing concurrently a third control pressure, in accordance with the position of the manual valve means; a first control valve means operated by a solenoid for producing a first control pressure; first shift valve means connected to the first control pressure for connecting the first output port of the manual valve means to a first output port of the first shift valve means according to the control of the first control pressure; second shift valve means connected to the third control pressure for connecting the first output port of the first shift valve means to the first friction element in accordance with the control of the third control pressure.
Claim 10
Independent Claim
177 words
A system for controlling the operation of first and second friction elements, comprising: a source of regulated line fluid pressure; manual valve means moveable among positions selected by an operator for connecting said line pressure source to a first port of the manual valve means in accordance with the position of the manual valve means; a first control valve means operated by a solenoid for producing a first control pressure; first shift valve means connected to the first control pressure for connecting the first port of the manual valve means to a first output port of the first shift valve means and for connecting the first port of the manual valve means to the second friction element according to the control of the first control pressure; second control valve means operated by a solenoid for producing a second control pressure; and second shift valve means connected to the second control pressure for connecting the first output port of the first shift valve means to the first friction element according to the control of the second control pressure.
Claim 11
Independent Claim
177 words
A system for controlling the operation of first and second friction elements, comprising: a source of regulated line fluid pressure; manual valve means moveable among positions selected by an operator for connecting said line pressure source to a first port of the manual valve means in accordance with the position of the manual valve means; a first control valve means operated by a solenoid for producing a first control pressure; first shift valve means connected to the first control pressure for connecting the first port of the manual valve means to a first output port of the first shift valve means and for connecting the first port of the manual valve means to the second friction element according to the control of the first control pressure; second control valve means operated by a solenoid for producing a second control pressure; and second shift valve means connected to the second control pressure for connecting the first output port of the first shift valve means to the first friction element according to the control of the second control pressure.
Claim 12
Independent Claim
169 words
A method for controlling the operation of a first friction element in an automatic transmission that includes a source of regulated line fluid pressure, a manual valve moveable among positions selected by an operator comprising: connecting the line pressure source to a first output port of the manual valve in accordance with the position of the manual valve; producing a high pressure state and low pressure state of a first control pressure; connecting the first port of the manual valve to a first output port of the first shift valve means according to the state of the first control pressure; producing a high pressure state of a second control pressure corresponding to manual valve positions at which the gears are manually selected, and a low pressure state of a second control pressure corresponding to manual valve positions at which the gears are automatically selected; and connecting the first output port of the first shift valve means to the first friction element according to the control of the second pressure.
Claim 13
Independent Claim
169 words
A method for controlling the operation of a first friction element in an automatic transmission that includes a source of regulated line fluid pressure, a manual valve moveable among positions selected by an operator comprising: connecting the line pressure source to a first output port of the manual valve in accordance with the position of the manual valve; producing a high pressure state and low pressure state of a first control pressure; connecting the first port of the manual valve to a first output port of the first shift valve means according to the state of the first control pressure; producing a high pressure state of a second control pressure corresponding to manual valve positions at which the gears are manually selected, and a low pressure state of a second control pressure corresponding to manual valve positions at which the gears are automatically selected; and connecting the first output port of the first shift valve means to the first friction element according to the control of the second pressure.
Claim 14
Independent Claim
177 words
A method for controlling the operation of first and second friction element in an automatic transmission that includes a source of regulated line fluid pressure, a manual valve moveable among positions selected by an operator comprising: connecting the line pressure source to a first output port of the manual valve in accordance with the position of the manual valve; producing a high pressure state and low pressure state of a first control pressure; connecting the first port of the manual valve to a first output port of the first shift valve means and to the second friction element according to the state of the first control pressure; producing a high pressure state of a second control pressure corresponding to manual valve positions at which the gears are manually selected, and a low pressure state of a second control pressure corresponding to manual valve positions at which the gears are automatically selected; and connecting the first output port of the first shift valve means to the first friction element according to the control of the second control pressure.
Claim 15
Independent Claim
177 words
A method for controlling the operation of first and second friction element in an automatic transmission that includes a source of regulated line fluid pressure, a manual valve moveable among positions selected by an operator comprising: connecting the line pressure source to a first output port of the manual valve in accordance with the position of the manual valve; producing a high pressure state and low pressure state of a first control pressure; connecting the first port of the manual valve to a first output port of the first shift valve means and to the second friction element according to the state of the first control pressure; producing a high pressure state of a second control pressure corresponding to manual valve positions at which the gears are manually selected, and a low pressure state of a second control pressure corresponding to manual valve positions at which the gears are automatically selected; and connecting the first output port of the first shift valve means to the first friction element according to the control of the second control pressure.
Claim 16
Independent Claim
218 words
A method for controlling the operation of first and second friction element in an automatic transmission that includes a source of regulated line fluid pressure, a manual valve moveable among positions selected by an operator comprising: connecting the line pressure source to a first output port of the manual valve in accordance with the position of the manual valve; producing a high pressure state and low pressure state of a first control pressure; connecting the first port of the manual valve to a first output port of the first shift valve means and to the second friction element according to the state of the first control pressure; producing a high pressure state of a second control pressure corresponding to manual valve positions at which the gears are manually selected, and a low pressure state of a second control pressure corresponding to manual valve positions at which the gears are automatically selected; and producing a variable third control pressure corresponding to a requirement to pressurize the first friction element; directing alternately the second control pressure and the third control pressure to the second shift valve; and connecting the first output port of the first shift valve means to the first friction element according to the control of the second or third control pressure directed to the second shift valve.
Claim 17
Independent Claim
218 words
A method for controlling the operation of first and second friction element in an automatic transmission that includes a source of regulated line fluid pressure, a manual valve moveable among positions selected by an operator comprising: connecting the line pressure source to a first output port of the manual valve in accordance with the position of the manual valve; producing a high pressure state and low pressure state of a first control pressure; connecting the first port of the manual valve to a first output port of the first shift valve means and to the second friction element according to the state of the first control pressure; producing a high pressure state of a second control pressure corresponding to manual valve positions at which the gears are manually selected, and a low pressure state of a second control pressure corresponding to manual valve positions at which the gears are automatically selected; and producing a variable third control pressure corresponding to a requirement to pressurize the first friction element; directing alternately the second control pressure and the third control pressure to the second shift valve; and connecting the first output port of the first shift valve means to the first friction element according to the control of the second or third control pressure directed to the second shift valve.
Claim 18
Dependent Claim
33 words
The system of claim 10 wherein said first shift valve means further includes means for alternately pressurizing and venting the second friction element in accordance with the control of the first control pressure.
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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) | 1992-08-14 | 1993-02-13 | 1993-08-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-08-14 | 1997-02-13 | 1997-08-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-08-14 | 2001-02-13 | 2001-08-15 | $7700.00 | Window Closed / Lapsed |