GB1347976A - Anti-skid braking systems - Google Patents
Anti-skid braking systemsInfo
- Publication number
- GB1347976A GB1347976A GB1347976DA GB1347976A GB 1347976 A GB1347976 A GB 1347976A GB 1347976D A GB1347976D A GB 1347976DA GB 1347976 A GB1347976 A GB 1347976A
- Authority
- GB
- United Kingdom
- Prior art keywords
- signal
- diode
- valve
- transistor
- amplifier
- 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
1347976 Antiskid braking systems GIRLING Ltd 23 July 1971 [9 Sept 1970] 43116/70 Heading F2F In an antiskid braking system for a vehicle wheel speed, tachogenerators 11, 12 feed signals to frequency-to-voltage converters 13, 14 the outputs of which pass to a switch 15 which emits a signal to the remainder of the circuit of the signal from the slowest rotating wheel and two differentiating circuits producing signals responsive respectively to deceleration and acceleration receive the signal from switch 15 to relieve and apply the brakes through valve 64. The first differentiating circuit includes a PNP transistor 18 having its emitter connected through a capacitor 16 to switch 15 and is further connected through a diode 19 to a positive supply line 21, to a negative line 25 through resistor 26 and diode 27 and to the base of an NPN transistor 28. When the brakes are applied the first differentiating circuit produces at the emitter of transistor 28 a signal representing deceleration which is fed by way of a diode 35 to amplifier 56, 62 which forces current to flow in valve 64. As deceleration increases more current flows in valve 64 so that the braking effort is relieved. The second differentiating circuit comprises a capacitor 17 and NPN transistor 36 the collector of which is connected to the base of an NPN transistor having its collector connected to a further positive supply line 32 and its emitter connected to the base of an NPN transistor 26. As the braking effort is relieved the second differentiating circuit produces an output at the emitter of a transistor 46 representative of wheel acceleration which is amplified and inverted by an amplifier 49 provided with negative feedback through a resistor 54 and also applied to amplifier 56, 62. A signal now appears through a diode 34 to control amplifier 56, 62 and cause current to flow through valve 64. Because of the signal inversion greater acceleration produces a greater signal through diode 34. Capacitors 22, 23 counteract temperature variations.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB4311670 | 1970-09-09 |
Publications (1)
Publication Number | Publication Date |
---|---|
GB1347976A true GB1347976A (en) | 1974-02-27 |
Family
ID=10427392
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB1347976D Expired GB1347976A (en) | 1970-09-09 | 1971-07-23 | Anti-skid braking systems |
Country Status (5)
Country | Link |
---|---|
AU (1) | AU3183371A (en) |
DE (1) | DE2144868A1 (en) |
ES (1) | ES395390A1 (en) |
FR (1) | FR2106392B1 (en) |
GB (1) | GB1347976A (en) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DD270820A3 (en) * | 1987-02-12 | 1989-08-16 | Berliner Bremsenwerk Veb | METHOD FOR REGULATING THE BRAKE INTENSITY ON RAIL VEHICLES |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB1270385A (en) * | 1968-05-22 | 1972-04-12 | Girling Ltd | Sensing circuit for use in vehicle braking systems |
US3554612A (en) * | 1968-08-21 | 1971-01-12 | Gen Motors Corp | Antilock brake control |
-
1971
- 1971-07-23 GB GB1347976D patent/GB1347976A/en not_active Expired
- 1971-07-30 AU AU31833/71A patent/AU3183371A/en not_active Expired
- 1971-08-26 FR FR7130942A patent/FR2106392B1/fr not_active Expired
- 1971-09-08 DE DE19712144868 patent/DE2144868A1/en active Pending
- 1971-09-08 ES ES395390A patent/ES395390A1/en not_active Expired
Also Published As
Publication number | Publication date |
---|---|
AU3183371A (en) | 1973-02-01 |
FR2106392A1 (en) | 1972-05-05 |
DE2144868A1 (en) | 1973-07-19 |
FR2106392B1 (en) | 1974-03-29 |
ES395390A1 (en) | 1974-10-16 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
PS | Patent sealed | ||
PCNP | Patent ceased through non-payment of renewal fee |