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 Title: |
US3967862:
Anti-skid control system employing integral-plus-proportional control of pulsed modulation
[ Derwent Title ]
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| Country: |
US United States of America
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| Inventor: |
Hunter, Gordon E.; Anaheim, CA
Rau, James E.; Anaheim, CA
Van Wyk, Rogell; Brea, CA
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| Assignee: |
Rockwell International Corporation, El Segundo, CA
other patents from ROCKWELL INTERNATIONAL CORPORATION (480040) (approx. 4,880)
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| Published / Filed: |
1976-07-06
/ 1975-03-17
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| Application Number: |
US1975000559100
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| IPC Code: |
Advanced:
B60T 8/172;
B60T 8/1761;
B60T 8/1763;
B60T 8/58;
Core:
more...
IPC-7:
B60T 8/02;
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| ECLA Code: |
B60T8/1763B;
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| U.S. Class: |
Current:
303/150;
180/197;
246/182.B;
318/609;
Original:
303/021.P;
180/082.R;
303/020;
246/182.B;
318/609;
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| Field of Search: |
180/82 R
188/181
235/150.2
303/020,21
317/005
318/609
340/053,62
246/182 R,182 B
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| Priority Number: |
| 1975-03-17 |
US1975000559100 |
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| Abstract: |
In an anti-skid type control system for automotive vehicles, apparatus for maintaining wheel slip in a region of values associated with a maximum coefficient of road friction. Periodic modulation of the wheel brake torque in conjunction with wheel acceleration measurement are employed to determine the variation of the coefficient of road friction from an optimum value, while integral-plus-proportional control of the pulse modulation allows compensatory variation of the wheel torque and slip condition to a condition providing the optimum coefficient of road friction.
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| Attorney, Agent or Firm: |
Hamann, H. Fredrick ;
Pitts, Rolf M. ;
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| Primary / Asst. Examiners: |
Kunin, Stephen G.;
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| INPADOC Legal Status: |
None
Family Legal Status Report
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| Parent Case: |
COPENDING APPLICATIONS
1. U.S. application Ser. No. 514,974 filed Oct. 15, 1974 by James E. Rau, et al, for Anti-Skid Control System now U.S. Pat. No. 3,930,688.
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| Family: |
Show 15 known family members
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First Claim:
Show all 14 claims |
We claim:
1. In an anti-skid type control system for wheeled vehicles having both braked wheels and a prime mover for applying an accelerating torque to said wheels, apparatus for maintaining wheel slip (s) in a region of values associated with a maximum coefficient of road friction µ, comprising
- first means for determining the variation of the coefficient of friction from a maximum value and including pulse modulation means for periodically increasing and decreasing alternately an alternative one of a braking action and accelerating torque; and
- second means responsive to said first means for changing said alternative one of an applied braking action and an applied accelerating torque in such sense as to increase said coefficient of friction and including integral-plus-proportional control means for both applying the pulse modulation of said pulse modulation means and biasing the average system acceleration condition about which such modulation is applied, said modulation being varied in a sense to maximize said coefficient of friction.
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| Background / Summary: |
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| Drawing Descriptions: |
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| Description: |
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| Forward References: |
Show 40 U.S. patent(s) that reference this one
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