WO2003025435A1 - Gangschaltstellglieder - Google Patents
Gangschaltstellglieder Download PDFInfo
- Publication number
- WO2003025435A1 WO2003025435A1 PCT/DE2002/003215 DE0203215W WO03025435A1 WO 2003025435 A1 WO2003025435 A1 WO 2003025435A1 DE 0203215 W DE0203215 W DE 0203215W WO 03025435 A1 WO03025435 A1 WO 03025435A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- cylinder
- shift drum
- shaft
- gear engagement
- actuator according
- Prior art date
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H63/00—Control outputs from the control unit to change-speed- or reversing-gearings for conveying rotary motion or to other devices than the final output mechanism
- F16H63/02—Final output mechanisms therefor; Actuating means for the final output mechanisms
- F16H63/08—Multiple final output mechanisms being moved by a single common final actuating mechanism
- F16H63/16—Multiple final output mechanisms being moved by a single common final actuating mechanism the final output mechanisms being successively actuated by progressive movement of the final actuating mechanism
- F16H63/18—Multiple final output mechanisms being moved by a single common final actuating mechanism the final output mechanisms being successively actuated by progressive movement of the final actuating mechanism the final actuating mechanism comprising cams
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H61/00—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing
- F16H61/26—Generation or transmission of movements for final actuating mechanisms
- F16H61/28—Generation or transmission of movements for final actuating mechanisms with at least one movement of the final actuating mechanism being caused by a non-mechanical force, e.g. power-assisted
- F16H61/30—Hydraulic or pneumatic motors or related fluid control means therefor
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H61/00—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing
- F16H61/68—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing specially adapted for stepped gearings
- F16H61/682—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing specially adapted for stepped gearings with interruption of drive
Definitions
- the present invention relates to gear engagement actuators, and more particularly to shift drum actuators for controlling a gear shift mechanism of an automatic transmission system of a motor vehicle.
- shift drum actuators for an automated transmission system for motor vehicles for example as disclosed in GB2308874 and GB2311829, with express reference to these disclosures and the content of which is included in the disclosure of the present application, have used electric motors with high reduction gear mechanisms to drive the shift drum.
- the electric motor drives the shift drum through a worm gear mechanism. This poses particular problems with regard to installation restrictions in the system.
- automated transmission systems such as in GB2354295; GB2308413; and GB2358443, with express reference to these disclosures and the contents of which are incorporated in the disclosure of the present application, typically employ hydraulic control systems to control clutch actuation and gear engagement actuation.
- hydraulic control systems it is desirable that both clutch and gear engagement be performed by hydraulic means using an integrated hydraulic control circuit, and consequently linear hydraulic actuators are used rather than electrical shift drums in such systems.
- a gear engagement actuator includes a shift drum, the shift drum defining at least one annular track on its outer circumference, and a hydraulic rotary drive, the hydraulic rotary drive being concentrically formed within the shift drum and the hydraulic rotary drive comprising: a cylinder, a Shaft mounted coaxially with the cylinder, the outer diameter of the shaft being smaller than the inner diameter of the cylinder and the ends of the cylinder closed to define an annular, fluid-tight chamber, with an axial vane shape radially in on the shaft the sealing engagement with the inner diameter of the cylinder extends and an axial vane formation on the inner diameter of the cylinder extends radially into the sealing engagement with the outer diameter of the shaft, around the annular chamber in two fluiddi light sub-chambers, wherein fluid openings are provided for admitting the hydraulic fluid into and for ejecting the hydraulic fluid from each of the sub-chambers, with either the cylinder or the shaft
- Figure 1 shows a sectioned side elevation of a gear engagement member according to the present invention
- Figure 2 is a section on the line II-II of Figure 1;
- Figure 3 shows schematically a multi-speed transmission using a gear engagement actuator according to the present invention
- Figure 4 shows a projection of the tracks of the shift drum shown in Figure 3;
- Figure 5 schematically shows a hydraulic control circuit for an automatic transmission system employing a gear engagement actuator in accordance with the present invention.
- Figure 6 shows a double shift drum actuator according to the present invention.
- a gear engagement member 10 includes a shift drum 12 which defines an annular track 14 on its outer periphery.
- the opposite end of the cylinder 20 is closed off by means of an end plate 26 which is fastened and sealed to the cylinder 20 in a suitable manner.
- a shaft 30 is rotatably fastened coaxially to the cylinder 20 with the roller bearings 32, 34 in the closed end 22 or the end plate 26.
- the shaft 30 extends through and is sealed with respect to the end plate 26 to create an annular fluid-tight chamber 36 between the shaft 30 and the cylinder 20.
- the end of the shaft 30, which extends through the end plate 26, has a flange formation 38.
- the switching drum 12 is fastened to the flange formation 38 by means of screws 40 arranged at an angular distance apart or other suitable fastening means, so as to be rotatable with the shaft 30.
- the switching drum 12 is fastened to the flange formation 38 adjacent to one end of the cylinder 20 and extends coaxially to the latter in the direction of the connecting plate 24.
- An axial bearing 42 is the connecting plate 24 and the adjacent end of the switching drum 12 are provided.
- a first, axially extending blade formation 50 is fastened to the inner circumference of the cylinder 20 by the screws 52.
- the blade 50 extends radially in the direction of the shaft 30.
- a second, axially extending blade formation 54 is fastened to the outer circumference of the shaft 30 by the screws 56.
- the blade 54 extends radially toward the inner diameter of the cylinder 20.
- the sealing tips 60 are on the blade 50 for sealing engagement with the shaft 30, the closed end 22 of the cylinder 20 and the end plate 26, and on the blade 54 sealing engagement with the inner diameter, the closed end 22 of the cylinder 20 and the end plate 26 of the cylinder 20, whereby the annular chamber 36 is divided into two fluid-tight lower chambers 62, 64.
- the bores 66, 68 pass through the connecting plate 26 and the closed end 22 of the cylinder 20, the bores 66, 68 opening the subchambers 62, 64, one on each of the two sides of the blade 50 and adjacent to it.
- a stop means (not shown) is provided to limit the rotation of the shaft 30 so that the blade 54 sweeps over or bores the bores 66, 68.
- the transmission system of a motor vehicle comprises a transmission 70.
- An input shaft 72 of the transmission 70 is connected to the output shaft 74 of an engine 76 by a friction clutch 78.
- the clutch 78 is of conventional design, being a driven ne disc 80 which is mounted for rotation with the input shaft 72 of the transmission 70, the driven disc 80 is designed to be selected by friction with a flywheel 82 which is fixed for rotation with the output shaft 74 of the motor 76 in Intervention.
- a sequence controlled clutch cylinder 222 is provided for engaging and disengaging clutch 78.
- An output shaft 84 which leads out of the transmission 70, is attached parallel to the drive shaft 72.
- a series of gears 85-90 are mounted on the drive shaft 72 to rotate therewith.
- a corresponding row of gears 95 to 100 is slid onto the output shaft 84 to rotate relative to it.
- the gear wheels 85 to 89 and the gear wheels 95 to 99 are arranged as interlocking pairs and are sized to match the various switching stages; gears 85 and 95 give fifth gear; gears 86 and 96 give fourth gear; gears 87 and 97 give third gear; gears 88 and 98 provide second gear; and gears 89 and 99 give first gear.
- Another gear 102 engages between gears 90 and 100 to reverse the direction of rotation and provide reverse gear.
- the synchronizing units 104, 105, 106 are located between the gears 99 and 100; 97 and 98; respectively 95 and 96 ready.
- the axial movement of the synchronization unit 104 to the left, as shown in FIG. 3, thereby engages the gear 99 in a rotary connection with the output shaft 84, while the axial movement of the synchronization unit 104 to the right engages the gear 100 in a rotary connection with the output shaft 84 ,
- the axial movement of the synchronizing unit 105 engages the gear 97 or the gear 98 depending on the selection in a rotary connection with the output shaft 84 and the axial movement of the synchronizing unit 106 moves the gear 95 or the gear 96 depending on the selection Rotary connection with the output shaft 84.
- the speed sensors 107 and 108 are available to monitor the speed of rotation of the transmission input shaft 72 and the transmission output shaft 84 and to provide signals that are proportional thereto and sent to an electronic control unit.
- the shift drum actuator 10 is mounted within the transmission housing, parallel to the input and output shafts 72, 84.
- the shift drum 12 has three circumferential grooves in its outer circumference, which the tracks 110,
- each track 110, 111, 112 has an annular portion 113, a first deviating portion 114 that deviates to one side of the annular portion 113, and a second deviating portion 115 that faces the other side of the annular portion 113 deviates.
- Three shift forks 116, 117, 118 are slidably mounted on the rail 119 for movement parallel to the axis of rotation of the shift drum 12 and the input or output shaft 72, 84.
- the shift fork 116 engages on one side in the synchronization unit 104 and on the other side in the track 110 of the shift drum 12;
- the shift fork 117 engages on one side in the synchronizing unit 105 and on the other side in the track 111 of the shift drum 12;
- the shift fork 118 engages on one side in the synchronizing unit 106 and on the other side in the track 112 of the shift drum 12.
- a gear change from first to second gear For example, a gear change from first to second gear:
- the shift drum 12 is rotated to a position in which the shift fork 116 engages in the deviating portion 114 of the track 110 so that the shift fork 116 and the synchronizer 104 are shifted to the left, as shown in Figure 3, whereby the gear 99 with the output shaft 84 engages;
- the shift drum 12 is rotated further so that the shift fork 117 engages with the deviating portion 115 of the track 111, whereby the shift fork 117 and the synchronizer 105 are moved to the right to engage the gear 98 with the output shaft 84 and to engage second gear.
- a hydraulic control circuit for an automated transmission system using a shift drum actuator as shown in FIGS. 1 to 3 comprises a hydraulic pressure accumulator 275 and an expansion tank 278 for the hydraulic fluid.
- An electrically driven pump 223 is provided to charge the pressure accumulator 275 via a check valve 276.
- a pressure transducer 282 is provided to sense the accumulator pressure and send signals corresponding to it to the electronic control unit.
- a pressure control valve 280 is provided between the outlet of the pump 223 and a surge tank 278 to ensure that the pressure built up by the pump 223 does not exceed a maximum, predetermined value.
- the pump 223, which is driven by an electric motor, is controlled by the electronic control unit on the basis of the signals from the pressure transducer 282 in order to keep the pressure accumulator 275 at a suitable pressure.
- a solenoid operated main control valve 120 includes a housing 122 that defines a valve cylinder 124.
- a piston slide 126 is slidably arranged in the valve cylinder 124, the piston valve 126 having three axially spaced circumferential webs 128, 130, 132 which are in sealing engagement with the valve cylinder 124.
- a solenoid 134 acts on one end of the spool 126 so that when the solenoid 134 is energized, the spool 126 moves axially in the valve cylinder 124 against a load caused by a compression spring 136 which in turn acts on the opposite end of the spool 126. is exercised.
- An inlet 138 into the valve cylinder 124 of the valve 120 is connected to the pressure accumulator rather 275.
- An outlet 140 from the valve cylinder 124 of the main control valve 120 is connected to the expansion tank 278.
- a first opening 142 of the valve cylinder 124 is with the working subchambers 62 and 64 of the Shift drum actuator 10 connected via a valve 144 and a second opening 148 is connected to the sequence-controlled clutch cylinder 222.
- the valve 144 is a solenoid-operated valve that has a housing 150 that defines a valve cylinder 151 with a spool 152 that is slidably inserted in the valve cylinder 151.
- the piston slide 152 has three axially spaced webs 154, 156, 158, the webs sealingly engaging the valve cylinder 151.
- An axial bore 160 opens to the end 162 of the piston slide 152 and creates the connection to a transverse bore 164, the transverse bore 164 opening between the webs 154 and 156 of the piston slide 152.
- a solenoid 166 acts on an end 168 of the spool 152 that is remote from the end 162 so that when the solenoid 166 is energized, the spool 152 moves axially in the valve cylinder 151 against a load applied by a compression spring 170, which in turn acts on the end 162 of the spool 152.
- An inlet 172 of the valve cylinder 151 is connected to the opening 142 of the main control valve 120.
- An outlet 174 from the valve cylinder 151 is connected to the expansion tank 278.
- a first opening 176, which opens to the valve cylinder 151, is connected to a sub-chamber 62 of the actuator 10 and a second opening 178, which opens to the valve cylinder 151, is connected to the second sub-chamber 64 of the actuator 10.
- the solenoid 166 is energized to move the spool 152 of the valve 144 to a second position in which the land 156 engages Opening 176 and the web 158 closes the opening 178, as a result of which the subchambers 62 and 64 are separated both from the pressure accumulator 275 and from the expansion tank 278 and the actuator 10 is locked hydraulically.
- the solenoid 134 of the main control valve 120 is then energized to move the spool 126 of the main control valve 120 to a second position.
- the main control valve connects the sequence-controlled clutch cylinder 222 to the pressure accumulator 275 via the opening 148 and the inlet 138 and the inlet 172 of the valve 144 to the pressure accumulator 275 via the opening 142 and the inlet 138.
- the hydraulic fluid under pressure therefore becomes initiated in the sequence-controlled clutch cylinder 222, which disengages the clutch 78.
- solenoid 134 may be energized to move the main control valve back to a zero position. In this zero position, the opening 148 is closed by the web 132, which separates the opening 148 from the inlet 138 and from the outlet 140, so that the clutch is held in the disengaged position, however, the opening 142 of the main control valve 120 with the pressure accumulator 275 remains connected.
- the excitation current to the solenoid 166 of the valve 144 can then be reduced, which moves the valve 144 to a third position in which the sub-chamber 62 with the pressure accumulator 275 via the opening 176 and the inlet 172 of the valve 144 and the opening 142 and the Inlet 138 of the main control valve 120 and the subchamber 64 with the expansion tank 278 via the opening 178 and the Inlet 174 of valve 144 is connected so that the pressure of the fluid acting on blade 54 causes shaft 30 and shift drum 12 attached thereto to rotate in a counterclockwise direction; or the flow can be boosted to move the spool 152 to a fourth position in which the subchamber 62 with the expansion tank 278 via the opening 176, the bores 164 and 160 and the inlet 174 and the subchamber 64 with the Pressure accumulator 275 is connected via opening 178 and inlet 172 of valve 144 and opening 142 and inlet 138 of main control valve 120, so that the pressure of the fluid acting on vane 54, shaft 30
- a position sensor 226 provides a signal that indicates the angular position of the shift drum 12.
- the position sensor 226 can be a linear potentiometer 228, which is attached transversely to the axis of rotation of the switching drum 12.
- the linear potentiometer 228 has a piston with rod 230 that engages a spiral cam surface 232 on the shift drum 12 so that when the shift drum 12 rotates, the piston 230 moves into and out of the potentiometer 228 by the Change the voltage of the signal.
- the position sensor 226 may be a rotatable potentiometer that is rotated by the rotation of the shift drum 12 to provide a voltage that changes with the angular position of the shift drum 12.
- Signals from position sensor 226 are provided to the electronic control unit to provide an indication of the position of shift drum 12 which corresponds to the pre-calibrated positions which in turn correspond to the engagement of each of the gear shift stages.
- Measurements of position sensor 226 can then be used by a closed loop system to control valve 144 to control the switching current. mel 12 to move to the predetermined positions to engage the desired gears.
- valve 144 When the desired gear has been engaged, the solenoid 166 of valve 144 is energized to return valve 144 to its zero position, closing openings 176 and 178 and creating a hydraulic lock that prevents actuator 10 from moving further.
- the solenoid 134 of the main control valve 120 can then be de-energized to move the main control valve 120 back to its rest position, as shown in Figure 5, which allows the fluid from the sequenced clutch cylinder 222 to be returned to the surge tank 278, which in turn renewed engagement of clutch 78 allowed.
- the main control valve 120 can be switched between its rest position and the second position, so that the clutch 78 is engaged again in a controlled manner, as for example in EP0038113; EP0043660; EP0059035; EP0101220 or WO92 / 13208.
- solenoid 134 of master control valve 120 may be de-energized so that it returns to the rest position shown in FIG. 5. Solenoid 166 of valve 144 can then be de-energized to release pressure from sub-chambers 62 and 64 of the shift drum actuator.
- Figure 6 illustrates a double shift drum actuator in which two actuators 10, 10 ', as described above, are mounted back to back on a common connecting plate 24'.
- the double shift drum actuator is preferably mounted within the transmission housing 300 parallel to the input and output shafts of the transmission.
- the pivot formation 302 on the end bracket 44 of the one shift drum actuator 10 engages a socket formation 302 on an inner surface of the gear housing 300, while the pivot formation 46 'of the other shift drum actuator 10' engages through a bore 304 in a clutch housing 306.
- a grub screw 308 secures the dual shift drum assembly axially and rotatably with respect to the clutch housing 306.
- the dual shift drum assembly described with reference to Figure 6 can be controlled by hydraulic switching similar to that described with reference to Figure 5, with separate valves 144 provided for individually controlling each shift drum actuator 10, 10 '.
- the hydraulic control circuit has two main control valves 120, one for controlling each of the clutches, while valve 144 for each actuator 10, 10 'is controlled by a different main control valve 120.
- the shift drum 12 rotatably mounted on the cylinder 20 by means of roller bearings.
- the shift drum can be resiliently mounted with respect to the shaft 30, for example by an elastic sleeve that is used under pressure between the flange formations 38 and an inner diameter of the shift drum 12 to provide axial and / or radial compliance.
- the shaft 30 can form the stator, which is non-rotatably mounted with respect to the connecting plate 24, the cylinder 20 being mounted on the shaft 30 for rotation with respect thereto and the switching drum 12 for rotation is attached to the cylinder 20.
- the cylinder 20 can be defined by an inner diameter of the shift drum 12.
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Gear-Shifting Mechanisms (AREA)
- Hydraulic Clutches, Magnetic Clutches, Fluid Clutches, And Fluid Joints (AREA)
Abstract
Description
Claims
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE10294281T DE10294281D2 (de) | 2001-09-04 | 2002-08-31 | Gangschaltstellglieder |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB0121350A GB2379251A (en) | 2001-09-04 | 2001-09-04 | Shift drum actuator |
GB0121350.3 | 2001-09-04 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2003025435A1 true WO2003025435A1 (de) | 2003-03-27 |
Family
ID=9921462
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/DE2002/003215 WO2003025435A1 (de) | 2001-09-04 | 2002-08-31 | Gangschaltstellglieder |
Country Status (5)
Country | Link |
---|---|
DE (2) | DE10240259A1 (de) |
FR (1) | FR2829215B1 (de) |
GB (1) | GB2379251A (de) |
IT (1) | ITMI20021880A1 (de) |
WO (1) | WO2003025435A1 (de) |
Families Citing this family (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
ITTO20031023A1 (it) * | 2003-12-18 | 2005-06-19 | Fiat Ricerche | Architettura di trasmissione a doppia frizione per autoveicolo. |
JP4602026B2 (ja) * | 2004-08-10 | 2010-12-22 | 本田技研工業株式会社 | 車両用自動変速機を備えるエンジン |
JP4698461B2 (ja) * | 2006-03-28 | 2011-06-08 | 本田技研工業株式会社 | シフトドラム装置 |
DE102008059267B4 (de) * | 2007-12-13 | 2017-05-04 | Schaeffler Technologies AG & Co. KG | Doppelkupplungsgetriebe |
FR2983549A1 (fr) * | 2011-12-06 | 2013-06-07 | Renault Sa | Barillet optimise pour commande de vitesses de boite automatisee et procedes de commande |
DE102014000719A1 (de) * | 2014-01-23 | 2015-07-23 | Getrag Getriebe- Und Zahnradfabrik Hermann Hagenmeyer Gmbh & Cie Kg | Schaltwalzenanordnung für ein Kraftfahrzeuggetriebe |
DE102014208493A1 (de) * | 2014-05-07 | 2015-11-12 | Bayerische Motoren Werke Aktiengesellschaft | Schaltwalze für ein Schaltgetriebe eines Kraftfahrzeugs sowie Schaltgetriebe mit einer solchen Schaltwalze |
DE102017109361A1 (de) | 2017-05-02 | 2018-11-08 | Schaeffler Technologies AG & Co. KG | Aktuatoranordnung für ein Kraftfahrzeuggetriebe |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2590232A (en) * | 1943-06-23 | 1952-03-25 | Curtiss Wright Corp | Multispeed transmission and automatic transmission control |
DE2053685A1 (de) * | 1969-10-31 | 1971-07-08 | Aisin Seiki K.K., Kanya (Japan) | Wechselgetriebe |
EP0547007A1 (de) * | 1991-12-11 | 1993-06-16 | FIAT AUTO S.p.A. | Einrichtung zur Betätigung eines Kraftfahrzeuggetriebes |
US5868035A (en) * | 1996-04-04 | 1999-02-09 | S.A.M.M.-Societe D'applications Des Machines Motrices | Electrohydraulic actuator for controlling a vehicle gearbox of the type having an input barrel |
DE19924335A1 (de) * | 1999-05-27 | 2000-12-07 | Getrag Getriebe Zahnrad | Stellvorrichtung und Kraftfahrzeug mit Stellvorrichtung |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS58170953A (ja) * | 1982-04-01 | 1983-10-07 | Honda Motor Co Ltd | 変速機のドラム式切換装置 |
US4664217A (en) * | 1984-12-24 | 1987-05-12 | United Technologies Electro Systems, Inc. | Electric shift actuator for vehicle transfer case |
JP2559027B2 (ja) * | 1986-03-22 | 1996-11-27 | ヤマハ発動機株式会社 | 変速機のシフトドラム |
-
2001
- 2001-09-04 GB GB0121350A patent/GB2379251A/en not_active Withdrawn
-
2002
- 2002-08-31 DE DE2002140259 patent/DE10240259A1/de not_active Withdrawn
- 2002-08-31 DE DE10294281T patent/DE10294281D2/de not_active Expired - Fee Related
- 2002-08-31 WO PCT/DE2002/003215 patent/WO2003025435A1/de not_active Application Discontinuation
- 2002-09-03 IT ITMI20021880 patent/ITMI20021880A1/it unknown
- 2002-09-03 FR FR0210892A patent/FR2829215B1/fr not_active Expired - Fee Related
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2590232A (en) * | 1943-06-23 | 1952-03-25 | Curtiss Wright Corp | Multispeed transmission and automatic transmission control |
DE2053685A1 (de) * | 1969-10-31 | 1971-07-08 | Aisin Seiki K.K., Kanya (Japan) | Wechselgetriebe |
EP0547007A1 (de) * | 1991-12-11 | 1993-06-16 | FIAT AUTO S.p.A. | Einrichtung zur Betätigung eines Kraftfahrzeuggetriebes |
US5868035A (en) * | 1996-04-04 | 1999-02-09 | S.A.M.M.-Societe D'applications Des Machines Motrices | Electrohydraulic actuator for controlling a vehicle gearbox of the type having an input barrel |
DE19924335A1 (de) * | 1999-05-27 | 2000-12-07 | Getrag Getriebe Zahnrad | Stellvorrichtung und Kraftfahrzeug mit Stellvorrichtung |
Also Published As
Publication number | Publication date |
---|---|
FR2829215B1 (fr) | 2005-12-23 |
DE10294281D2 (de) | 2004-07-22 |
GB2379251A (en) | 2003-03-05 |
FR2829215A1 (fr) | 2003-03-07 |
GB0121350D0 (en) | 2001-10-24 |
DE10240259A1 (de) | 2003-06-05 |
ITMI20021880A1 (it) | 2003-03-05 |
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