Patent US2823134A successfully refreshed from Google Patents.
Patent US5993350A successfully refreshed from Google Patents.
US5993350A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Automated manual transmission clutch controller
Assignee: Old Carco LLC
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Filing: 1997-12-01
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Granted: 1999-11-30
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Expires: 2017-12-01
Abstract
Abstract A powertrain system for a hybrid vehicle. The hybrid vehicle includes a heat engine, such as a diesel engine, and an electric machine, which operates as both an electric motor and an alternator, to power the vehicle. The hybrid vehicle also includes a manual-style transmission configured to operate as an automatic transmission from the perspective of the driver. The engine and the electric machine drive an input shaft which in turn drives an output shaft of the transmission. In addition to driving the transmission, the electric machine regulates the speed of the input shaft in order to synchronize the input shaft during either an upshift or downshift of the transmission by either decreasing or increasing the speed of the input shaft. When decreasing the speed of the input shaft, the electric motor functions as an alternator to produce electrical energy which may be stored by a storage device. Operation of the transmission is controlled by a transmission controller which receives input signals and generates output signals to control shift and clutch motors to effect smooth launch, upshift shifts, and downshifts of the transmission, so that the transmission functions substantially as an automatic transmission from the perspective of the driver, while internally substantially functioning as a manual transmission.
Inventors
- 👤 Robert E. Lawrie
- 👤 Richard G. Reed, Jr.
- 👤 David J. Rausen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 19:29
CPC Classifications
B; B60; B60W; B60W20/00; B60W20/40; B60W30/00; B60W30/18; B60W30/18009; B60W30/18027; B60K; B60K6/00; B60K6/20; B60K6/22; B60K6/40; B60K6/42; B60K6/48; B60K6/50; B60K6/54; B60K6/547; B60W10/00; B60W10/02; B60W10/04; B60W10/08; B60W10/10; F; F16; F16D; F16D48/00; F16D48/06; F16D48/08; F16H; F16H61/00; F16H61/04; F16H61/0403; B60W2710/00; B60W2710/02; B60W2710/025; B60W2710/06; B60W2710/0644; F16D2500/00; F16D2500/10; F16D2500/104; F16D2500/10406; F16D2500/10412; F16D2500/106; F16D2500/1066; F16D2500/30; F16D2500/306; F16D2500/3067; F16D2500/308; F16D2500/3081; F16D2500/30816; F16D2500/3082; F16D2500/30825; F16D2500/314; F16D2500/31406; F16D2500/3144; F16D2500/70; F16D2500/704; F16D2500/70402; F16D2500/7041; F16D2500/70422; F16D2500/70426; F16D2500/70452; F16D2500/70454; F16D2500/70464; F16D2500/70488; F16H2061/0422; Y; Y02; Y02T; Y02T10/00; Y02T10/60; Y02T10/62; Y10; Y10S; Y10S903/00; Y10S903/902; Y10S903/903; Y10S903/904; Y10S903/915; Y10S903/917; Y10S903/919; Y10S903/945; Y10S903/946; Y10S903/951; Y10T; Y10T74/00; Y10T74/19; Y10T74/19219; Y10T74/19251; Y10T74/19284
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
297 words
A hybrid transmission system for a vehicle having an engine operating at a speed defined in revolutions per minute (RPM), a drive wheel, a drive shaft connected to the drive wheel for rotating the drive wheel, comprising: a transmission gear set, having an input shaft having an input shaft speed defined in revolutions per minute (RPM) and an output shaft, the input shaft being driven and driving the output shaft, the output shaft being adapted to cause motion of the drive wheel through the drive shaft, the input and output shafts having a plurality of gears which selectively mesh for engagement to vary a relative speed of rotation between the input shaft and the output shaft; a plurality of shift motors to effect engagement and disengagement of the gears; a clutch for selectively coupling the engine to the transmission; a clutch motor for engaging and disengaging the clutch; an electric machine connected to the input shaft for selectively increasing and decreasing the speed of the input shaft; a transmission controller which receives a plurality of input signals and generates a plurality of output signals, the output signals controlling the motors and the electric machine in order to engage a new gear ratio between the input and output shafts and to synchronize the input and the output shafts just prior to engaging the new gear ratio; and a clutch controller which generates a clutch command to control engagement and disengagement of the clutch in accordance with at least one of the plurality of input signals, the clutch controller determining whether the vehicle is in one of a launch and a shift condition, the clutch controller generating commands to substantially regulate the engine RPM during a launch condition and generating commands to substantially regulate slip during a shift condition.
Claim 2
Dependent Claim
297 words
A hybrid transmission system for a vehicle having an engine operating at a speed defined in revolutions per minute (RPM), a drive wheel, a drive shaft connected to the drive wheel for rotating the drive wheel, comprising: a transmission gear set, having an input shaft having an input shaft speed defined in revolutions per minute (RPM) and an output shaft, the input shaft being driven and driving the output shaft, the output shaft being adapted to cause motion of the drive wheel through the drive shaft, the input and output shafts having a plurality of gears which selectively mesh for engagement to vary a relative speed of rotation between the input shaft and the output shaft; a plurality of shift motors to effect engagement and disengagement of the gears; a clutch for selectively coupling the engine to the transmission; a clutch motor for engaging and disengaging the clutch; an electric machine connected to the input shaft for selectively increasing and decreasing the speed of the input shaft; a transmission controller which receives a plurality of input signals and generates a plurality of output signals, the output signals controlling the motors and the electric machine in order to engage a new gear ratio between the input and output shafts and to synchronize the input and the output shafts just prior to engaging the new gear ratio; and a clutch controller which generates a clutch command to control engagement and disengagement of the clutch in accordance with at least one of the plurality of input signals, the clutch controller determining whether the vehicle is in one of a launch and a shift condition, the clutch controller generating commands to substantially regulate the engine RPM during a launch condition and generating commands to substantially regulate slip during a shift condition.
Claim 3
Dependent Claim
54 words
The apparatus of claim 1 wherein in the launch condition, the clutch controller determines a desired clutch position in accordance with a disengaged clutch position, an engine throttle position, a launch difference, defined as the difference between the engine RPM and a desired launch engine RPM, and a mathematical derivative of the launch difference.
Claim 4
Dependent Claim
29 words
The apparatus of claim 2 wherein the clutch controller updates the desired clutch position iteratively until the throttle position is zero or the slip is below a predetermined threshold.
Claim 5
Dependent Claim
50 words
The apparatus of claim 1 wherein when the vehicle is in the shift condition and the clutch is being engaged, the clutch controller determines a desired clutch position in accordance with a position of the clutch when fully disengaged and a difference between an actual slip and a desired slip.
Claim 6
Dependent Claim
25 words
The apparatus of claim 4 wherein the clutch controller limits a change in the desired clutch position so the clutch cannot disengage rapidly during engagement.
Claim 7
Dependent Claim
29 words
The apparatus of claim 4 wherein the clutch controller calculates the desired slip by decrementing an initial slip value in accordance with the engine RPM and engine throttle position.
Claim 8
Dependent Claim
23 words
The apparatus of claim 4 wherein the clutch controller updates the desired clutch position iteratively until the slip falls below a predetermined threshold.
Claim 9
Dependent Claim
23 words
The apparatus of claim 1 wherein the input shaft, the output shaft, and the respective gears are substantially configured as a manual transmission.
Claim 10
Dependent Claim
33 words
The apparatus of claim 1 wherein the electric machine varies the speed of the input shaft so that the relative speeds of the input shaft and output shaft enables synchronization of the gears.
Claim 11
Dependent Claim
328 words
A hybrid transmission system for a vehicle having an engine operating at a speed defined in revolutions per minute (RPM), a drive wheel, a drive shaft connected to the drive wheel for rotating the drive wheel, comprising: a transmission gear set, having an input shaft having an input shaft speed defined in revolutions per minute (RPM) and an output shaft, the input shaft being driven and driving the output shaft, the output shaft being adapted to cause motion of the drive wheel through the drive shaft, the input and output shafts having a plurality of gears which selectively mesh for engagement to vary a relative speed of rotation between the input shaft and the output shaft; a plurality of shift motors to effect engagement and disengagement of the gears; a clutch for selectively coupling the engine to the transmission; a clutch motor for engaging and disengaging the clutch; an electric machine connected to the input shaft for selectively increasing and decreasing the speed of the input shaft; a transmission controller which receives a plurality of input signals and generates a plurality of output signals, the output signals controlling the motors and the electric machine in order to engage a new gear ratio between the input and the output shafts and to synchronize the input and the output shafts just prior to engaging the new gear ratio; and a clutch controller which generates a clutch command to control engagement and disengagement of the clutch in accordance with at least one of the plurality of input signals the clutch controller determining a desired clutch position in accordance with a position of the clutch when fully disengaged and a difference between an actual slip, and a desired slip, the clutch controller limiting a change in the desired clutch position so the clutch cannot disengage rapidly during engagement, wherein the clutch controller calculates the desired slip by decrementing an initial slip value in accordance with the engine RPM and engine throttle position.
Claim 12
Dependent Claim
328 words
A hybrid transmission system for a vehicle having an engine operating at a speed defined in revolutions per minute (RPM), a drive wheel, a drive shaft connected to the drive wheel for rotating the drive wheel, comprising: a transmission gear set, having an input shaft having an input shaft speed defined in revolutions per minute (RPM) and an output shaft, the input shaft being driven and driving the output shaft, the output shaft being adapted to cause motion of the drive wheel through the drive shaft, the input and output shafts having a plurality of gears which selectively mesh for engagement to vary a relative speed of rotation between the input shaft and the output shaft; a plurality of shift motors to effect engagement and disengagement of the gears; a clutch for selectively coupling the engine to the transmission; a clutch motor for engaging and disengaging the clutch; an electric machine connected to the input shaft for selectively increasing and decreasing the speed of the input shaft; a transmission controller which receives a plurality of input signals and generates a plurality of output signals, the output signals controlling the motors and the electric machine in order to engage a new gear ratio between the input and the output shafts and to synchronize the input and the output shafts just prior to engaging the new gear ratio; and a clutch controller which generates a clutch command to control engagement and disengagement of the clutch in accordance with at least one of the plurality of input signals the clutch controller determining a desired clutch position in accordance with a position of the clutch when fully disengaged and a difference between an actual slip, and a desired slip, the clutch controller limiting a change in the desired clutch position so the clutch cannot disengage rapidly during engagement, wherein the clutch controller calculates the desired slip by decrementing an initial slip value in accordance with the engine RPM and engine throttle position.
Claim 13
Dependent Claim
60 words
The apparatus of claim 10 wherein the clutch controller determines whether the vehicle is in one of a launch and a shift condition, the clutch controller generating commands substantially to regulate the engine RPM during a launch condition and generating commands substantially to regulate slip, defined as a difference between engine RPM and input shaft RPM, during a shift condition.
Claim 14
Dependent Claim
54 words
The apparatus of claim 11 wherein in a launch condition, the clutch controller determines a desired clutch position in accordance with a disengaged clutch position, an engine throttle position, a launch difference, defined as the difference between the engine RPM and a desired launch engine RPM, and a mathematical derivative of the launch difference.
Claim 15
Dependent Claim
29 words
The apparatus of claim 12 wherein the clutch controller updates the desired clutch position iteratively until the throttle position is zero or the slip is below a predetermined threshold.
Claim 16
Dependent Claim
23 words
The apparatus of claim 10 wherein the clutch controller updates the desired clutch position iteratively until the slip falls below a predetermined threshold.
Claim 17
Dependent Claim
33 words
The apparatus of claim 14 wherein the electric machine varies the speed of the input shaft so that the relative speeds of the input shaft and output shaft enables synchronization of the gears.
References Cited (Backward Citations)
US2960200A
Cited
US3001618A
Cited
US3211249A
Cited
US3478851A
Cited
US4006801A
Cited
US4033435A
Cited
US4400997A
Cited
US4533011A
Cited
US4405029A
Cited
US4410071A
Cited
US4651852A
Cited
US4644811A
Cited
US4765450A
Cited
US4793206A
Cited
US4874070A
Cited
US4981202A
Cited
US5081583A
Cited
GB2237350A
Cited
US5322150A
Cited
US5321993A
Cited
US5489012A
Cited
US5337848A
Cited
US5267635A
Cited
US5562565A
Cited
US5526909A
Cited
US5357822A
Cited
WO1995002857A1
Cited
US5755302A
Cited
US5560249A
Cited
US5578911A
Cited
US5624350A
Cited
US5719768A
Cited
US5605211A
Cited
US5713425A
Cited
US5669842A
Cited
US5743143A
Cited
US5730676A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2002-11-29 | 2003-05-31 | 2003-11-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2006-11-29 | 2007-05-31 | 2007-11-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2010-11-29 | 2011-05-31 | 2011-11-30 | $7700.00 | Window Closed / Lapsed |