EP0784552A1 - Quetschdesign für einbauproportionalventil - Google Patents
Quetschdesign für einbauproportionalventilInfo
- Publication number
- EP0784552A1 EP0784552A1 EP95937401A EP95937401A EP0784552A1 EP 0784552 A1 EP0784552 A1 EP 0784552A1 EP 95937401 A EP95937401 A EP 95937401A EP 95937401 A EP95937401 A EP 95937401A EP 0784552 A1 EP0784552 A1 EP 0784552A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- piston
- housing
- inlet port
- insert
- chambers
- 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.)
- Withdrawn
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
- B60T11/00—Transmitting braking action from initiating means to ultimate brake actuator without power assistance or drive or where such assistance or drive is irrelevant
- B60T11/10—Transmitting braking action from initiating means to ultimate brake actuator without power assistance or drive or where such assistance or drive is irrelevant transmitting by fluid means, e.g. hydraulic
- B60T11/28—Valves specially adapted therefor
- B60T11/34—Pressure reducing or limiting valves
-
- 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
- B60T8/26—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force characterised by producing differential braking between front and rear wheels
- B60T8/262—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force characterised by producing differential braking between front and rear wheels using valves with stepped characteristics
- B60T8/265—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force characterised by producing differential braking between front and rear wheels using valves with stepped characteristics for hydraulic brake systems
Definitions
- the present invention relates generally to inline proportioning valves, and more specifically to inline proportioning valves located between the master cylinder and the wheel cylinders in a hydraulic braking system for a vehicle.
- An object of the present invention is to provide an inline proportioning valve for use in a vehicle braking system having a one-piece housing in which an insert is provided as a subassembly and no retaining ring is required.
- Another object of the present invention is to provide an inline proportioning valve with improved manufacturing capability and reduced manufacturing costs.
- an improvement for an inline proportioning valve for a hydraulic brake system of a vehicle having: a housing having first and second ends, the first end adapted for connection with a master cylinder of the brake system and the second end of the housing adapted to be connected with a fluid flow line extending to the vehicle wheel cylinders, the housing forming an axial inlet port in the first end and an outlet port in the second end, the housing including a plurality of axially extending chambers in communication with each other with each chamber being of cylindrical configuration and decreasing in diameter from the inlet port to the outlet port, the housing including three chambers with a peripheral, radially extending shoulder at the juncture between adjacent chambers, a differential area piston positioned in the chambers in sealed relation thereto, the piston including an axial passageway therethrough, the piston including a larger pressure contact area in the chamber adjacent the outlet port than the pressure contact area in the chamber adjacent the inlet port whereby pressure passing through the passageway in the piston will react against the piston to force the piston towards the in
- an inline proportioning valve comprising: a housing having first and second ends thereof and having a plurality of cylindrical chambers formed axially therethrough in communication with each other; a subassembly located within said chambers; and wherein said subassembly is staked into position within the chambers by deforming a portion of the first end of the housing sufficiently radially inwardly adjacent the subassembly to hold said subassembly within said housing.
- FIGURE 1 shows a vertical cross-sectional view of an inline proportioning valve in accordance with U.S. Pat. No. 4,893,878.
- FIGURE 2 shows a vertical cross-sectional view of an inline proportioning valve in accordance with the present invention.
- FIGURE 3 shows a blown up cross-sectional view of a staked housing and insert in accordance with the present invention.
- FIG. 1 shows a vertical cross-section of the prior art reference U.S. Patent No. 4,893,878.
- This valve is used in a hydraulic vehicle braking system for proportioning the application of fluid pressure to front and rear brake cylinders.
- the interior components of the inline proportioning valve of this reference are held into place by means of the retainer ring 10.
- the present invention is provided as shown in FIG. 2.
- the valve 20 includes a one-piece housing 22 which has one end 24 which is smaller in peripheral circumference and provided with external threads for threaded engagement into a master cylinder of a braking system.
- the other end 26 of the housing includes an internally threaded outlet 28 which has a beveled or chamfered peripheral edge 30 which extends to a central passageway 32 having a diameter substantially less than the internally threaded outlet 28.
- the outlet 28 is connected to a hydraulic conduit extending to a wheel cylinder in the hydraulic brake system.
- the housing includes a first cavity 34 extending longitudinally axially therein and in communication with the outlet 28.
- the housing 22 further includes second and third cavities 36,38 formed longitudinally axially therein in communication with the first cavity 34.
- a differential area piston 40 is received within the cavities 34,36,38 and includes a peripheral outwardly extending flange 42 intermediate the ends of the piston for engagement with a shoulder 44 between the first cavity 34 and second cavity 36.
- the upper end of the piston includes a peripheral shoulder 46 which is slidably received in the chamber 34 and projects slightly outwardly from the circumference of the upper end portion 48 of the piston.
- An O-ring seal 50 is engaged with the upper surface of the flange 46 and is retained in place by outlet pressure.
- a peripheral flange or rib 52 on the upper end of the piston retains the O-ring 50 on disassembly.
- the piston 40 includes a lower end 54 of reduced diameter which is received in an opening 56 in the top wall 58 of the insert 60, with the juncture between the larger diameter portion of the piston and the smaller diameter portion of the piston defining a shoulder 62.
- a calibrated coil spring 64 is positioned within the second cavity 36 and has its ends abuttingly engaging the flange 42 on the piston and the top wall 58 of the insert 60, respectively, to bias the flange 42 against the shoulder 46.
- the second cavity 36 also includes a radially extending vent passage 66 communicating with a peripheral groove 68 in the exterior of the housing 22 with a second O-ring seal 70 being positioned in the groove 68 and forming a closure for the vent passage 66 with pressure in the vent passage 66 causing the O-ring seal 70 to move outwardly in the groove sufficiently to vent the pressure from the passage 66.
- a third O-ring seal 72 seals the insert 60 with respect to the interior of the third chamber 38.
- a fourth O-ring seal 74 is interposed between the exterior of the reduced diameter 54 of the piston and the interior surface of the chamber 76 of the interior of the insert 60.
- a poppet 80 is positioned and housed within the insert 60 and includes an inner rounded peripheral edge 82 engageable with the seal 74.
- the outer periphery 84 of the poppet is received within an enlarged cylindrical chamber or cavity 86 in the insert 60 with a shoulder 88 being provided at the juncture between the chamber 86 and the chamber 76 which form the interior of the insert 60.
- the bottom portion 90 of the poppet 80 includes openings or passageways to allow flow therethrough and is disposed slightly below the periphery 84 with a conical spring 92 engaging the periphery of the bottom portion 90 of the poppet with the conical spring also engaging an internal lip 94 of the insert.
- the insert, including the conical spring 92 is provided as a subassembly.
- This subassembly is inserted into the third cavity 38, and a lower portion 96 is staked sufficiently radially inwardly over the lower portion 98 of the insert in order to hold the insert in position.
- the insert, including the conical spring 92 may be provided as a subassembly. This may greatly decrease the cost and increases ease of manufacturing, while improving quality control by eliminating the error involved in operator assembly of the former retainer ring, eliminating contaminants, and providing a convenient subassembly operation.
Landscapes
- Engineering & Computer Science (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Hydraulic Control Valves For Brake Systems (AREA)
- Transmission Of Braking Force In Braking Systems (AREA)
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US32803894A | 1994-10-24 | 1994-10-24 | |
US328038 | 1994-10-24 | ||
PCT/US1995/012976 WO1996012632A1 (en) | 1994-10-24 | 1995-10-17 | Staked design for inline proportioning valve |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0784552A1 true EP0784552A1 (de) | 1997-07-23 |
EP0784552A4 EP0784552A4 (de) | 1997-12-17 |
Family
ID=23279232
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP95937401A Withdrawn EP0784552A4 (de) | 1994-10-24 | 1995-10-17 | Quetschdesign für einbauproportionalventil |
Country Status (2)
Country | Link |
---|---|
EP (1) | EP0784552A4 (de) |
WO (1) | WO1996012632A1 (de) |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0366278A2 (de) * | 1988-10-24 | 1990-05-02 | Nippon Air Brake Co., Ltd. | Hydraulisches Druckregelventil |
EP0393274A1 (de) * | 1989-04-21 | 1990-10-24 | Nippon Air Brake Co., Ltd. | Hydraulisches Drucksteuerventil für den Anbau an einen Hauptbremszylinder |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4412702A (en) * | 1981-05-21 | 1983-11-01 | The Bendix Corporation | Fluid pressure proportioning valve and plug member therefor |
DE3526191A1 (de) * | 1985-07-23 | 1987-02-05 | Bosch Gmbh Robert | Druckmodulator |
US4893878A (en) * | 1988-09-27 | 1990-01-16 | Hilite Industries, Inc. | Inline proportioning valve for brake systems |
-
1995
- 1995-10-17 WO PCT/US1995/012976 patent/WO1996012632A1/en not_active Application Discontinuation
- 1995-10-17 EP EP95937401A patent/EP0784552A4/de not_active Withdrawn
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0366278A2 (de) * | 1988-10-24 | 1990-05-02 | Nippon Air Brake Co., Ltd. | Hydraulisches Druckregelventil |
EP0393274A1 (de) * | 1989-04-21 | 1990-10-24 | Nippon Air Brake Co., Ltd. | Hydraulisches Drucksteuerventil für den Anbau an einen Hauptbremszylinder |
Non-Patent Citations (1)
Title |
---|
See also references of WO9612632A1 * |
Also Published As
Publication number | Publication date |
---|---|
WO1996012632A1 (en) | 1996-05-02 |
EP0784552A4 (de) | 1997-12-17 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
|
17P | Request for examination filed |
Effective date: 19970422 |
|
AK | Designated contracting states |
Kind code of ref document: A1 Designated state(s): AT BE CH DE DK ES FR GB GR IE IT LI LU MC NL PT SE |
|
A4 | Supplementary search report drawn up and despatched |
Effective date: 19971031 |
|
AK | Designated contracting states |
Kind code of ref document: A4 Designated state(s): AT BE CH DE DK ES FR GB GR IE IT LI LU MC NL PT SE |
|
17Q | First examination report despatched |
Effective date: 19990311 |
|
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN |
|
18D | Application deemed to be withdrawn |
Effective date: 19990722 |