GB306909A - Hydro-pneumatic brake operating apparatus for vehicles - Google Patents
Hydro-pneumatic brake operating apparatus for vehiclesInfo
- Publication number
- GB306909A GB306909A GB6448/29A GB644829A GB306909A GB 306909 A GB306909 A GB 306909A GB 6448/29 A GB6448/29 A GB 6448/29A GB 644829 A GB644829 A GB 644829A GB 306909 A GB306909 A GB 306909A
- Authority
- GB
- United Kingdom
- Prior art keywords
- reservoir
- valve
- pressure
- vehicle
- liquid
- 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
- B60T8/32—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force responsive to a speed condition, e.g. acceleration or deceleration
- B60T8/34—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force responsive to a speed condition, e.g. acceleration or deceleration having a fluid pressure regulator responsive to a speed condition
- B60T8/40—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force responsive to a speed condition, e.g. acceleration or deceleration having a fluid pressure regulator responsive to a speed condition comprising an additional fluid circuit including fluid pressurising means for modifying the pressure of the braking fluid, e.g. including wheel driven pumps for detecting a speed condition, or pumps which are controlled by means independent of the braking system
- B60T8/4095—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force responsive to a speed condition, e.g. acceleration or deceleration having a fluid pressure regulator responsive to a speed condition comprising an additional fluid circuit including fluid pressurising means for modifying the pressure of the braking fluid, e.g. including wheel driven pumps for detecting a speed condition, or pumps which are controlled by means independent of the braking system including wheel driven pumps for detecting a speed condition
Landscapes
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Engineering & Computer Science (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Braking Systems And Boosters (AREA)
Abstract
306,909. Compagnie Internationale des Freins Automatiques Soc. Anon. Feb. 27, 1928, [Convention date]. Fluid-pressure.-In hydraulic apparatus for actuating vehicle brakes in which liquid under the pressure of compressed gas is admitted from a storage reservoir to the brake cylinders to apply the brakes, and is returned to the reservoir in the release operation by a re-charging pump, the braking action is effected in two stages, one in which the braking pressure is provided by the storage reservoir and a second in which the brake cylinders receive an additional quantity of liquid dependent upon the speed of the vehicle. The braking pressure may also be rendered. automatically dependent upon the load of the vehicle The apparatus shown in Fig. 1 comprises a pump 5 driven from an axle of the vehicle so as normally to exhaust a discharge reservoir 3 and to charge a storage reservoir 8 containing liquid under pneumatic pressure. To obtain this condition in the first instance a quantity of liquid is placed in the closed reservoir 3 and the pump piston 5 first withdraws this liquid by way of the pipe 3<1> and suction valve 4b and delivers it through the delivery valve 4<a> and pipe 7 to the reservoir 8, air being subsequently withdrawn from the reservoir 3 and forced into the reservoir 8 until an equilibrium pressure and vacuum is reached in the two reservoirs, which is dependent upon the clearance space in the pump cylinder 4. Auxiliary hydraulic or pneumatic cylinders which may operate for example the doors of the vehicle may be supplied from the lower or upper part of the reservoir 8 and discharge into the reservoir 3, from which the fluid is again returned to the reservoir 8 by the pump 5. If the pneumatic cylinders discharge into the atmosphere the introduction of additional air into the system is provided for by the provision of a spring-loaded non-return valve 3b on the reservoir 3. Cylinders may elso be connected to the reservoir 3 for operation by-the vacuum therein. In this case the pressure in the reservoir 8 is prevented from rising above the normal by the provision of a spring-loaded valve 8<b> on the reservoir 8. The cylinder 26 which operates the brakes is connected to the reservoir 8 when it is desired to apply the brakes by de-energizing the magnet E which normally holds closed a non-return valve 8<a> thus permitting the pressure liquid to flow to the cylinder through the pipe 1 and past a non-return valve 10<a>. The valve 8<a> now acts as a suction valve to allow an additional pump piston 5b which may as shown form part of the piston 5 to draw additional liquid from the reservoir 8 and deliver it past the valve 10<a> to the brake cylinder from which it can return to the reservoir past a valve 9<a> and the pipe 7. An adjustable stop 9<k> limits the opening movement of the valve 9<a>. A braking pressure dependent upon the speed of the vehicle is thus established. In order that this pressure may also be a function of the load of the vehicle, a valve 9<b> may be provided arranged to be closed by a rod 91 to an extent dependent upon the extent of the yielding of the bearing springs. Release of the brakes is effected by energizing the magnet 3<c>, thus opening the valve 3a. Fig. 2 shows a modification in which the discharge reservoir is dispensed with and the brake piston 25 serves as the re-charging pump, being formed as the core of a solenoid whereby it is operated to return the liquid through the passage 9 to the reservoir 9 to release the brakes. In this construction the rod 91 varies the pressure of a spring acting upon the valve 9<a>. The Specification as open to inspection under Sect. 91 (3) (a) states that auxiliary cylinders may be provided for the operation off the electric motor controllers of a train of vehicles. This subject-matter does not appear in the Specification as accepted.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
BE306909X | 1928-02-27 |
Publications (1)
Publication Number | Publication Date |
---|---|
GB306909A true GB306909A (en) | 1930-05-27 |
Family
ID=3867491
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB6448/29A Expired GB306909A (en) | 1928-02-27 | 1929-02-27 | Hydro-pneumatic brake operating apparatus for vehicles |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB306909A (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2584038A1 (en) * | 1985-07-01 | 1987-01-02 | Pons Lechart Raphael | Hydraulic device, with application systems for variation of servo assisted braking as a function of the degree of roadholding of the vehicle |
EP0211218A2 (en) * | 1985-07-01 | 1987-02-25 | Raphael Pons-Léchart | Hydraulical friction-dependent assisted-braking system |
FR2595308A1 (en) * | 1986-03-07 | 1987-09-11 | Asea Sa | HYDRAULIC BRAKE CONTROL SYSTEM |
-
1929
- 1929-02-27 GB GB6448/29A patent/GB306909A/en not_active Expired
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2584038A1 (en) * | 1985-07-01 | 1987-01-02 | Pons Lechart Raphael | Hydraulic device, with application systems for variation of servo assisted braking as a function of the degree of roadholding of the vehicle |
EP0211218A2 (en) * | 1985-07-01 | 1987-02-25 | Raphael Pons-Léchart | Hydraulical friction-dependent assisted-braking system |
EP0211218A3 (en) * | 1985-07-01 | 1989-08-23 | Raphael Pons-Lechart | Hydraulical friction-dependent assisted-braking system |
FR2595308A1 (en) * | 1986-03-07 | 1987-09-11 | Asea Sa | HYDRAULIC BRAKE CONTROL SYSTEM |
EP0239452A1 (en) * | 1986-03-07 | 1987-09-30 | Hagglunds Denison | Hydraulic control system for brakes |
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