US5267635A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Clutch actuator system
Assignee: LuK Leamington Ltd
•
Filing: 1992-07-13
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Granted: 1993-12-07
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Expires: 2012-07-13
Abstract
Abstract A clutch actuation system for use in engaging and disengaging the clutch of a manual transmission motor vehicle. The system includes a sensor sensing the rotary movement of the clutch pedal, an electric motor having a screw output shaft driving a ball nut mechanism engaging a clutch release member, a further sensor sensing the position of the ball nut mechanism and thereby of the clutch release member, and an electronic control module. The module compares the magnitude of the position signal received from the clutch pedal position sensor to the magnitude of the position signal received from the ball nut position sensor and operates in a closed-loop servo manner to move the clutch release member via the electric motor through a distance proportioned to the extent of pivotal movement of the clutch pedal so that the operator, by precise control of the extent of pivotal movement of the clutch pedal, can precisely control the extent of engagement or disengagement of the clutch. Return movement of the system to the clutch engaged position is preferably accomplished by back driving the ball nut and motor via the clutch diaphragm spring.
Inventors
- 👤 David C. Peterson
- 👤 Keith V. Leigh-Monstevens
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 10:41
CPC Classifications
F; F16; F16D; F16D48/00; F16D48/06; F16D48/064; F16D2500/00; F16D2500/10; F16D2500/102; F16D2500/1021; F16D2500/1023; F16D2500/1025; F16D2500/30; F16D2500/302; F16D2500/3022; F16D2500/3026; F16D2500/314; F16D2500/31406; F16D2500/31413; F16D2500/70; F16D2500/704; F16D2500/70402; F16D2500/7041
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
267 words
A clutch actuator system for use with a clutch having a clutch shaft and a clutch release member operative when actuated to engage and disengage the clutch, the actuator system including input signal means operative in response to operator movement of a control member to generate an electrical input signal indicative of a desire to disengage the clutch and control means operative in response to receipt of the input signal to actuate the release member, characterized in that the clutch includes a clutch housing; the clutch release member comprises a clutch release lever projecting out of the clutch housing to define a free end outside of the clutch housing; the input signal generated by the input signal means is an electrical signal proportioned to the position of the control member; the control means includes means generating an electrical position signal proportioned to the position of the clutch release lever, means comparing the input signal and the position signal and operative in response to a sensed difference in the input and position signals to generate an electrical output signal, and an electrical motor positioned outside of the clutch housing, receiving the electrical output signal, having an output shaft rotatable about an axis displaced from the rotational axis of the clutch shaft, and having a screw element and nut element assembly drivingly interconnecting the output shaft of the motor and the free end of the clutch release lever; and the electrical position signal generating means comprises a release lever position sensor mounted outside the clutch housing proximate the electrical motor and including a probe engaging one of said elements.
Claim 2
Dependent Claim
267 words
A clutch actuator system for use with a clutch having a clutch shaft and a clutch release member operative when actuated to engage and disengage the clutch, the actuator system including input signal means operative in response to operator movement of a control member to generate an electrical input signal indicative of a desire to disengage the clutch and control means operative in response to receipt of the input signal to actuate the release member, characterized in that the clutch includes a clutch housing; the clutch release member comprises a clutch release lever projecting out of the clutch housing to define a free end outside of the clutch housing; the input signal generated by the input signal means is an electrical signal proportioned to the position of the control member; the control means includes means generating an electrical position signal proportioned to the position of the clutch release lever, means comparing the input signal and the position signal and operative in response to a sensed difference in the input and position signals to generate an electrical output signal, and an electrical motor positioned outside of the clutch housing, receiving the electrical output signal, having an output shaft rotatable about an axis displaced from the rotational axis of the clutch shaft, and having a screw element and nut element assembly drivingly interconnecting the output shaft of the motor and the free end of the clutch release lever; and the electrical position signal generating means comprises a release lever position sensor mounted outside the clutch housing proximate the electrical motor and including a probe engaging one of said elements.
Claim 3
Dependent Claim
25 words
An actuator according to claim 1 wherein the electric motor has a screw output shaft constituting the screw element of the screw and nut assembly.
Claim 4
Dependent Claim
19 words
An actuator according to claim 1 wherein the release member position sensor senses the position of the nut element.
Claim 5
Dependent Claim
29 words
An actuator according to claim 1 wherein the control member is a clutch pedal and the input signal means senses the extent of pivotal movement of the clutch pedal.
Claim 6
Dependent Claim
174 words
A clutch actuator system for use with a motor vehicle having a clutch pedal and a clutch having a clutch shaft and a clutch release member operative when actuated to engage and disengage the clutch, said system comprising: an electric motor; a screw and nut assembly, including a screw element and a nut element, driven by the electric motor and adapted to drivingly engage the clutch release member; and a position sensor tracking the position of one of said elements and generating a position signal having a value that varies continuously in proportion to the position of said one element; said position sensor being fixedly positioned with respect to the electric motor and including a probe engaging said one element; said electric motor including a screw output shaft constituting said screw element; said nut element being threadedly mounted on said screw output shaft and engaging the clutch release member; said probe engaging the nut element; said nut element including guide rods slidably received in guide bores provided in the housing of the electric motor.
Claim 7
Dependent Claim
174 words
A clutch actuator system for use with a motor vehicle having a clutch pedal and a clutch having a clutch shaft and a clutch release member operative when actuated to engage and disengage the clutch, said system comprising: an electric motor; a screw and nut assembly, including a screw element and a nut element, driven by the electric motor and adapted to drivingly engage the clutch release member; and a position sensor tracking the position of one of said elements and generating a position signal having a value that varies continuously in proportion to the position of said one element; said position sensor being fixedly positioned with respect to the electric motor and including a probe engaging said one element; said electric motor including a screw output shaft constituting said screw element; said nut element being threadedly mounted on said screw output shaft and engaging the clutch release member; said probe engaging the nut element; said nut element including guide rods slidably received in guide bores provided in the housing of the electric motor.
References Cited (Backward Citations)
US2072832A
Cited
US3235045A
Cited
US3507374A
Cited
US3411611A
Cited
GB2124321A
Cited
DE3438594A1
Cited
US4648498A
Cited
US4766985A
Cited
GB2204374A
Cited
US4865173A
Cited
US4976347A
Cited
US4981202A
Cited
JPH0262429A
Cited
US5119913A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1996-12-06 | 1997-06-07 | 1997-12-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2000-12-06 | 2001-06-07 | 2001-12-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2004-12-06 | 2005-06-07 | 2005-12-07 | $7700.00 | Window Closed / Lapsed |