US4035698A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Means for counteracting slipping and skidding in a motor-driven rail-vehicle
Assignee: ABB Norden Holding AB
•
Filing: 1973-10-18
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Granted: 1977-07-12
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Expires: 1993-10-18
Abstract
Abstract For counteracting slipping and skidding in a motor-driven rail vehicle, the acceleration of the driving wheel is sensed and is used to control the torque of the driving motor. The arrangement includes a device which is responsive to an absolute value of the acceleration which exceeds a predetermined first value to reduce the torque, and to a decrease in the absolute value of the acceleration to a second value to increase the torque. The torque reducing arrangement reduces the torque at a predetermined rate until a low first torque value has been reached, then reduces the torque at a lower rate until the predetermined second low acceleration value is reached, and thereafter increases the torque, the reverse of this procedure is followed when increasing the torque.
Inventors
- 👤 Bo Soderberg
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 13:49
CPC Classifications
B; B60; B60T; B60T8/00; B60T8/17; B60T8/1701; B60T8/1705; B60L; B60L2200/00; B60L2200/26
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
143 words
In a motor-driven rail vehicle having a driving wheel driven by a driving motor, an acceleration-sensing member for sensing the angular acceleration of the driving wheel and a torque-controlling member for controlling the torque of the motor, means connecting the acceleration-sensing member to the torque-controlling member including means responsive to an acceleration, the absolute value of which exceeds a predetermined first value, to reduce the torque rapidly and, to the decrease of the absolute value of the acceleration to a predetermined second value, to increase the torque, the torque-controlling member including means to carry out said reduction of the torque at a predetermined rate, to continue to reduce the torque at a lower rate, when a predetermined low, first torque value has been reached, until the absolute value of the acceleration has decreased to said second value, and thereafter to increase the torque.
Claim 2
Dependent Claim
143 words
In a motor-driven rail vehicle having a driving wheel driven by a driving motor, an acceleration-sensing member for sensing the angular acceleration of the driving wheel and a torque-controlling member for controlling the torque of the motor, means connecting the acceleration-sensing member to the torque-controlling member including means responsive to an acceleration, the absolute value of which exceeds a predetermined first value, to reduce the torque rapidly and, to the decrease of the absolute value of the acceleration to a predetermined second value, to increase the torque, the torque-controlling member including means to carry out said reduction of the torque at a predetermined rate, to continue to reduce the torque at a lower rate, when a predetermined low, first torque value has been reached, until the absolute value of the acceleration has decreased to said second value, and thereafter to increase the torque.
Claim 3
Dependent Claim
48 words
In a device according to claim 1, the torque-controlling member including means to carry out the increase of the torque at a predetermined rate until a predetermined, second torque value, lower than the maximum torque, has been reached, and thereafter to increase the torque at a lower rate.
Claim 4
Dependent Claim
29 words
In a device according to claim 1 in a railway engine, said first, predetermined value of the angular acceleration being adjustable in dependence on the weight of the train.
Claim 5
Dependent Claim
31 words
In a device according to claim 1 in a rail vehicle driven by a direct current motor, the torque-controlling member including means to influence the armature current of the driving motor.
References Cited (Backward Citations)
US3257597A
Cited
US3378743A
Cited
US3560759A
Cited
US3541406A
Cited
US3482887A
Cited
GB1182855A
Cited
US3657601A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-07-11 | 1981-01-10 | 1981-07-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-07-11 | 1985-01-10 | 1985-07-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-07-11 | 1989-01-10 | 1989-07-12 | $7700.00 | Window Closed / Lapsed |