GB1460851A - Anti-skid brake control system - Google Patents
Anti-skid brake control systemInfo
- Publication number
- GB1460851A GB1460851A GB341274A GB341274A GB1460851A GB 1460851 A GB1460851 A GB 1460851A GB 341274 A GB341274 A GB 341274A GB 341274 A GB341274 A GB 341274A GB 1460851 A GB1460851 A GB 1460851A
- Authority
- GB
- United Kingdom
- Prior art keywords
- signal
- circuit
- skid
- acceleration
- providing
- 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
Abstract
1460851 Antiskid braking systems EATON CORP 24 Jan 1974 [26 Jan 1973] 03412/74 Heading F2F An antiskid braking system for a vehicle having at least first and second spaced apart independently rotatable wheels comprises brake control means responsive to a skid signal for relieving braking pressure on the wheels, means for providing first and second wheel speed signals, a logic circuit for providing a skid signal to the brake control means when the acceleration rate of the faster wheel exceeds a predetermined positive acceleration and means for inhibiting the logic circuit from providing the said signal when the positive acceleration rate of the faster wheel attains a level representative of a second predetermined acceleration greater and more positive than that of said first predetermined acceleration. Sensors WS-1, WS-2 supply alternating signals to circuits SC-1, SC-2 each including a frequency to voltage converter and wheel speed signals are supplied to a summing amplifier SA and a high wheel speed selector HS. An accelerationdeceleration logic circuit A.D. provides a signal representing rate of velocity change to a comparator A.C. where it is compared with a reference signal. If the acceleration is greater than the reference signal a skid signal is provided but if it reaches the upper level of 5g a circuit AI inhibits comparator A.C. from providing a skid signal. If the average wheel speed signal decreases sufficiently fast its magnitude becomes less than the decaying reference signal and a skid signal will be provided but a circuit DFD delays it before application through an OR gate to the valve driver circuit VD, this time delay permitting the faster wheel to be braked for a longer time to have greater braking effect on the vehicle. The valve driver circuit is disabled if there is a low output voltage from the power regulator or if the OR gate provides an output signal greater than one second in the absence of a skid signal from circuit AC. A signal from the gate in excess of six seconds causes a fuse F to blow and loss of valve solenoid continuity or operation of the solenoid in the absence of a skid signal will also cause the fuse to blow, an indicator circuit IC also being provided.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US32667673A | 1973-01-26 | 1973-01-26 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB1460851A true GB1460851A (en) | 1977-01-06 |
Family
ID=23273210
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB341274A Expired GB1460851A (en) | 1973-01-26 | 1974-01-24 | Anti-skid brake control system |
Country Status (9)
| Country | Link |
|---|---|
| JP (1) | JPS49104088A (en) |
| AR (1) | AR205087A1 (en) |
| BR (1) | BR7400553D0 (en) |
| CA (1) | CA1029455A (en) |
| DE (1) | DE2403649A1 (en) |
| FR (1) | FR2215338B1 (en) |
| GB (1) | GB1460851A (en) |
| IT (1) | IT1006170B (en) |
| SE (1) | SE397316B (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1539210A (en) * | 1976-09-14 | 1979-01-31 | Girling Ltd | Anti-skid system |
| DE2740419C2 (en) * | 1977-09-08 | 1982-05-19 | Wabco Fahrzeugbremsen Gmbh, 3000 Hannover | Circuit arrangement to prevent the wheel speed from overshooting the vehicle speed in vehicles with anti-lock braking systems |
| DE2754126A1 (en) * | 1977-12-05 | 1979-06-07 | Teves Gmbh Alfred | Aquaplaning or wheel spin warning system for vehicles - uses individual wheel sensors providing signals proportional to speed, reference unit and comparators |
| DE3413738C2 (en) * | 1984-04-12 | 1993-11-04 | Teves Gmbh Alfred | SLIP CONTROL BRAKE SYSTEM FOR ROAD VEHICLES |
-
1974
- 1974-01-01 AR AR25207774A patent/AR205087A1/en active
- 1974-01-11 CA CA189,934A patent/CA1029455A/en not_active Expired
- 1974-01-17 SE SE7400591A patent/SE397316B/en unknown
- 1974-01-23 JP JP941074A patent/JPS49104088A/ja active Pending
- 1974-01-24 GB GB341274A patent/GB1460851A/en not_active Expired
- 1974-01-25 DE DE19742403649 patent/DE2403649A1/en active Pending
- 1974-01-25 IT IT1986974A patent/IT1006170B/en active
- 1974-01-25 FR FR7402531A patent/FR2215338B1/fr not_active Expired
- 1974-01-25 BR BR55374A patent/BR7400553D0/en unknown
Also Published As
| Publication number | Publication date |
|---|---|
| DE2403649A1 (en) | 1974-08-01 |
| AR205087A1 (en) | 1976-04-05 |
| SE397316B (en) | 1977-10-31 |
| CA1029455A (en) | 1978-04-11 |
| FR2215338A1 (en) | 1974-08-23 |
| IT1006170B (en) | 1976-09-30 |
| BR7400553D0 (en) | 1974-08-22 |
| FR2215338B1 (en) | 1977-09-23 |
| JPS49104088A (en) | 1974-10-02 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PS | Patent sealed | ||
| PCNP | Patent ceased through non-payment of renewal fee |