GB1277857A - Anti-skid braking - Google Patents
Anti-skid brakingInfo
- Publication number
- GB1277857A GB1277857A GB6155370A GB6155370A GB1277857A GB 1277857 A GB1277857 A GB 1277857A GB 6155370 A GB6155370 A GB 6155370A GB 6155370 A GB6155370 A GB 6155370A GB 1277857 A GB1277857 A GB 1277857A
- Authority
- GB
- United Kingdom
- Prior art keywords
- wheel
- braking
- signal
- value
- slip
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
- B60T8/00—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force
- B60T8/17—Using electrical or electronic regulation means to control braking
- B60T8/176—Brake regulation specially adapted to prevent excessive wheel slip during vehicle deceleration, e.g. ABS
- B60T8/1761—Brake regulation specially adapted to prevent excessive wheel slip during vehicle deceleration, e.g. ABS responsive to wheel or brake dynamics, e.g. wheel slip, wheel acceleration or rate of change of brake fluid pressure
- B60T8/17613—Brake regulation specially adapted to prevent excessive wheel slip during vehicle deceleration, e.g. ABS responsive to wheel or brake dynamics, e.g. wheel slip, wheel acceleration or rate of change of brake fluid pressure based on analogue circuits or digital circuits comprised of discrete electronic elements
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Regulating Braking Force (AREA)
Abstract
1277857 Antiskid braking systems FIAT SpA 29 Dec 1970 [13 Jan 1970] 61553/70 Heading F2F In an antiskid braking system a solenoid valve 16 located in a line between a master cylinder 10 and brake cylinder is controlled by a signal generated by ascertaining the value of wheel slip at an instant not earlier than the instant of initiation of release of braking and resuming the braking when the slip of the wheel again reaches such a value. When a pedal 12 is depressed fluid passes through the normally open valve 16 to brake wheel 22. If the deceleration of the wheel exceeds a certain value a tachometer 24 supplying a signal to a threshold circuit 28 via a differentiating circuit 26 causes circuit 28 to set a flip-flop 34, which through an amplifier 36 causes solenoid 16 to be energized to release the braking action on wheel 22. At the same time a linear function generator 30, receiving a vehicle deceleration signal from accelerometer 40, is triggered by the output signal from threshold circuit 28 causing it to apply a signal to a comparator 44. When the wheel speed signal from tachometer 24 and the fictitious wheel speed signal from linear function generator 30 are equal indicating that the slip value is that which it had at the moment of brake release, comparator 44 resets flip-flop 34 which causes valve 16 to become de-energized and restore braking on wheel 22. To restore braking for a larger value of slip a delay circuit 50, Fig. 5 (not shown) is provided in the conductor 32 connecting the threshold circuit 28 to generator 30.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
IT6708570 | 1970-01-13 |
Publications (1)
Publication Number | Publication Date |
---|---|
GB1277857A true GB1277857A (en) | 1972-06-14 |
Family
ID=11299443
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB6155370A Expired GB1277857A (en) | 1970-01-13 | 1970-12-29 | Anti-skid braking |
Country Status (3)
Country | Link |
---|---|
DE (1) | DE2101237A1 (en) |
FR (1) | FR2076076B1 (en) |
GB (1) | GB1277857A (en) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2404009A1 (en) * | 1973-02-06 | 1974-08-08 | Waldemar Lester | ELECTRONIC CONTROL FOR AUTOMATIC ANTI-LOCK BRAKING SYSTEMS OF HYDRAULIC VEHICLE BRAKES |
DE3819424A1 (en) * | 1988-06-07 | 1989-12-14 | Lucas Ind Plc | METHOD FOR REGULATING THE BRAKE PRESSURE IN A BLOCK-PROTECTED VEHICLE BRAKE SYSTEM |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR1364343A (en) * | 1963-07-19 | 1964-06-19 | Knorr Bremse Gmbh | Anti-slip or anti-slip device for rail vehicles |
US3467443A (en) * | 1967-08-17 | 1969-09-16 | Nippon Denso Co | Antiskid apparatus for automotive vehicles |
GB1204266A (en) * | 1968-02-07 | 1970-09-03 | Westinghouse Brake & Signal | Braking systems and/or tractive systems |
-
1970
- 1970-12-29 GB GB6155370A patent/GB1277857A/en not_active Expired
-
1971
- 1971-01-12 DE DE19712101237 patent/DE2101237A1/en active Pending
- 1971-01-13 FR FR7100935A patent/FR2076076B1/fr not_active Expired
Also Published As
Publication number | Publication date |
---|---|
FR2076076A1 (en) | 1971-10-15 |
FR2076076B1 (en) | 1975-02-21 |
DE2101237A1 (en) | 1972-04-20 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
PS | Patent sealed | ||
PCNP | Patent ceased through non-payment of renewal fee |