GB882888A - Pneumatic servo device for the braking of a composite vehicle - Google Patents
Pneumatic servo device for the braking of a composite vehicleInfo
- Publication number
- GB882888A GB882888A GB8939/58A GB893958A GB882888A GB 882888 A GB882888 A GB 882888A GB 8939/58 A GB8939/58 A GB 8939/58A GB 893958 A GB893958 A GB 893958A GB 882888 A GB882888 A GB 882888A
- Authority
- GB
- United Kingdom
- Prior art keywords
- valve
- brakes
- trailer
- master cylinder
- elements
- 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
- B60T15/00—Construction arrangement, or operation of valves incorporated in power brake systems and not covered by groups B60T11/00 or B60T13/00
- B60T15/02—Application and release valves
- B60T15/36—Other control devices or valves characterised by definite functions
- B60T15/46—Other control devices or valves characterised by definite functions for retarding braking action to prevent rear vehicles of a vehicle train overtaking the forward ones
-
- 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
- B60T13/00—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems
- B60T13/10—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems with fluid assistance, drive, or release
- B60T13/58—Combined or convertible systems
- B60T13/581—Combined or convertible systems both hydraulic and pneumatic
Landscapes
- Engineering & Computer Science (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Hydraulic Control Valves For Brake Systems (AREA)
Abstract
882,888. Hydraulic brakes. FABBRICA ITALIANA MAGNETI MARELLI S.p.A. March 20, 1958 [March 23, 1957], No. 8939/58. Class 103 (1). A pneumatic servo device on a tractor-trailer vehicle, comprises a valve assembly having two independent distributing valves D1, D2 operated by a brake pedal, valve D1 acting through a pneumatic piston and cylinder Sa, Ra to control a master cylinder Po to operate the tractor brakes, while the valve D2 controls a pneumatic control valve to operate the trailer brakes. Depression of the pedal rotates lever C clockwise about O and due to oil pressure in master cylinder Po, lever a, moves a rod b to the left to compress springs m 1 , m 2 in valves D 1 , D 2 to move elements d 1 , d 2 against springs m<SP>1</SP> 1 , m<SP>1</SP> 2 , to open valves VD1, VD2; the valve VD2 opening first since plate SD2 is biased to the left by spring ma, to supply compressed air from line S2 to conduit 7 to actuate the trailer brakes, the valve VD1 supplying compressed air from line S1 via conduit 9 to move piston Sa against spring Ma to actuate master cylinder Po and apply the tractor brakes. On brake release the elements are returned to their normal positions by the springs, the return movement of elements d 1 , d 2 being limited by stops f and spring ma. In Fig. 1 the distributers D 1 , D 2 have their axes in the same vertical plane but may be mounted in the same horizontal plane, Fig. 2 (not shown). The trailer having the normal pressurized emergency line 8.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| IT344630X | 1957-03-23 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB882888A true GB882888A (en) | 1961-11-22 |
Family
ID=11239658
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB8939/58A Expired GB882888A (en) | 1957-03-23 | 1958-03-20 | Pneumatic servo device for the braking of a composite vehicle |
Country Status (4)
| Country | Link |
|---|---|
| BE (1) | BE564124A (en) |
| CH (1) | CH344630A (en) |
| FR (1) | FR1197977A (en) |
| GB (1) | GB882888A (en) |
-
0
- BE BE564124D patent/BE564124A/xx unknown
-
1958
- 1958-01-24 FR FR1197977D patent/FR1197977A/en not_active Expired
- 1958-01-28 CH CH344630D patent/CH344630A/en unknown
- 1958-03-20 GB GB8939/58A patent/GB882888A/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| BE564124A (en) | |
| FR1197977A (en) | 1959-12-03 |
| CH344630A (en) | 1960-02-15 |
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