WO2005051739A1 - Bremsanlage, insbesondere für nutzfahrzeuge - Google Patents
Bremsanlage, insbesondere für nutzfahrzeuge Download PDFInfo
- Publication number
- WO2005051739A1 WO2005051739A1 PCT/EP2004/010565 EP2004010565W WO2005051739A1 WO 2005051739 A1 WO2005051739 A1 WO 2005051739A1 EP 2004010565 W EP2004010565 W EP 2004010565W WO 2005051739 A1 WO2005051739 A1 WO 2005051739A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- brake
- valve
- rear axle
- load
- pressure
- Prior art date
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
- B60T8/343—Systems characterised by their lay-out
-
- 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
- B60T8/30—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 responsive to load
- B60T8/303—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 responsive to load using pneumatic 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
- B60T8/32—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
- B60T8/36—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 including a pilot valve responding to an electromagnetic force
- B60T8/361—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 including a pilot valve responding to an electromagnetic force wherein the pilot valve is mounted in a circuit controlling an auxiliary fluid system
Definitions
- the invention relates to a brake system, in particular a compressed air powered vehicle for commercial vehicles.
- Compressed air operated brake systems are used particularly in commercial vehicles. These often have a multi-circuit brake system with a front axle and a rear axle brake circuit. Since the load and thus the load on the rear axle of the commercial vehicle can fluctuate greatly, the rear axle brake pressure or the rear axle braking force is adjusted to the load by an automatic load-dependent brake pressure control (ALB). At low loads, only a low brake pressure or a low braking force is permitted to avoid excessive braking of the rear axle.
- ALB automatic load-dependent brake pressure control
- a load valve is provided in the front axle brake circuit, which is usually integrated in the operating valve. The braking force or the braking pressure on the front axle is influenced via the load valve depending on the braking pressure or braking force set on the rear axle.
- the load valve is connected to the rear axle brake circuit by a fluidic connection.
- the object of the invention is to further develop such a brake system with a load valve in the front axle brake circuit in such a way that the load-dependent brake pressure control on the rear axle can take place via an existing brake slip control system, for example ABS.
- This object is achieved by a brake system with the features of claim 1.
- a check valve is provided for blocking the fluidic connection from the control input of the load valve to the rear axle brake circuit fc ⁇ U.
- ABS control the Hinterac s brake slip control system
- the check valve switches from its non-blocking rest position to its blocking position , In this blocking position, the flow of fluid from the load valve in the direction of the brake cylinders of the rear axle is blocked, so that the pressure at the control input of the load valve at the time of switching the blocking valve into the blocking position can no longer be reduced.
- the check valve is designed as a two-way valve with an integrated check valve. It is in particular a non-return valve which, in the blocking position, enables a pressure increase in the fluid path between the blocking valve and the load valve, that is to say at the control input of the load valve. This makes it possible that, when the brake pressure on the rear axle increases to its locked position compared to the switchover time of the check valve via the rear axle brake slip control system, the pressure present at the control input of the load drain valve is also raised. As a result, braking pressures on the front axle that are limited to a value that is too low are avoided.
- the check valve can be switched back to its non-blocking rest position in a defined manner.
- This enables a defined transition from the blocking to the non-blocking state of the blocking valve.
- a defined transition ensures, in particular, that brake pressures and vehicle deceleration only change continuously and in particular with a limited gradient. In this way, operating states of the brake system which impair the stability of the vehicle or changes in vehicle behavior which surprise the driver are avoided.
- a further embodiment of the invention provides that the shut-off valve is integrated in another valve, in particular the service brake valve or a relay valve which supplies the rear axle with the brake system's feed pressure. This reduces the number of components required for vehicle assembly.
- the single figure shows a schematic block diagram of a part of a vehicle brake system.
- the vehicle brake system 10 has a front axle brake circuit
- the pressure supply to the front axle brake circuit 20 takes place via the connection 22 and the pressure supply to the rear axle brake circuit 13 takes place via the connection 24 in a manner known per se and not shown in detail.
- a pre-pressure for the front axle brake circuit 20 is fed to a control input 28 of a front axle relay valve 30 via a front axle valve 40 of the service brake valve 11.
- the front axle pressure control valve 34 is controlled by a control unit 19.
- the structure of the rear axle brake circuit 13 is analogous to that of the front axle brake circuit 20. From a rear axle valve 50 of the service brake valve 11, a form for the rear axle brake circuit 13 is fed to a control input 26 of a rear axle relay valve 21 in accordance with the brake pedal position.
- the rear axle relay valve 21 is connected to the compressed air supply of the rear axle brake circuit 13 via the connection 24.
- ara control input 26 requested brake pressure at the brake cylinders 14 of the rear axle brake circuit 13.
- at least one rear axle pressure control valve 15 is arranged for brake pressure control, for example for performing anti-lock control, which is controlled by the control unit 19 for this purpose.
- an automatic load-dependent brake pressure control is implemented via the control unit 19 and the rear axle pressure control valve 21.
- the brake pressure in the rear axle brake circuit 13 is limited depending on the detected loading condition to a maximum value corresponding to the detected loading condition or reduced in such a way that an early locking of the rear wheels when braking is prevented due to the current rear axle load, e.g. with the vehicle unladen.
- the pressure control valve 15 is thus used both for brake pressure control in the context of brake slip control and for automatic load-dependent brake pressure control.
- a so-called load drain valve 12 is integrated, which serves to limit the brake pressure on the front axle depending on the set brake pressure on the rear axle.
- the admission pressure generated by the front axle valve 40 of the service brake valve for the control input 28 of the front axle relay valve 21 is adapted by the load drain valve 12 to the brake pressure set on the rear axle and thus to the loading condition.
- the load valve 12 can vary the admission pressure generated by the front axle valve 40 depending on the brake pressure on the rear axle e.
- the brake pressure applied to the brake cylinders 14 of the rear axle is routed via a fluidic connection 16 to a control input 36 of the load valve 12. The lower the pressure at the control inlet 36 of the load valve, the lower the admission pressure at the control inlet 28 of the front axle relay valve he maximum possible brake pressure on the front axle.
- a shut-off valve 17 is interposed, which can be switched between an open rest position and a locking position blocking the fluidic connection 16 in the direction from the control input 36 of the load valve 12 to the brake cylinders 14 of the rear axle brake circuit 13.
- a check valve 18 integrated in the blocking valve 17 ensures that the pressure between the blocking valve 17 and the load valve 12 can track an increase in the brake pressure at the brake cylinders 14 of the rear axle. The pressure at the control input 36 of the load valve 12 can thus be increased but not reduced in the blocking position of the blocking valve 17.
- the check valve 17 is switched between the lock and rest positions by means of a corresponding control via the control unit 19.
- check valve 17 As an alternative to the preferred embodiment shown, it is also possible to design the check valve 17 as a structural unit with the service brake valve 11 or the rear axle relay valve 21, so that a more compact design of the brake system 10 can be achieved.
- a brake slip control is carried out on the rear axle during a braking operation, for example anti-lock control
- the shut-off valve 17 is switched into its locked position via the control unit 19 and the brake pressure prevailing in the fluidic connection 16 at the time of the changeover is held at the control input 38 of the load-relief valve, even when the brake pressure is lowered on the brake cylinders 14 of the rear axle, which is the case in particular with an anti-lock control.
- the brake pressure on the front axle is therefore not limited by the load valve during brake slip control on the rear axle.
- the check valve 17 is activated, for example by a correspondingly timed control, in such a way that the pressure at the load valve 12 approaches the rear axle brake pressure in a defined, sufficiently continuous manner.
- the pressure change at the control input 36 of the load drain valve 12 can depend on the pressure difference between the pressure at the control input 36 of the load drain valve 12 and the current brake pressure at the brake cylinders 14 of the rear axle.
- a value or a permissible range of values can also be specified for the pressure change or the pressure gradient at the control input 36 of the load drain valve 12, which must be maintained when adapting the pressure at the control input 36 of the load drain valve 12.
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Fluid Mechanics (AREA)
- Electromagnetism (AREA)
- Regulating Braking Force (AREA)
- Hydraulic Control Valves For Brake Systems (AREA)
- Vehicle Body Suspensions (AREA)
- Valves And Accessory Devices For Braking Systems (AREA)
Abstract
Description
Claims
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US10/577,509 US20070273201A1 (en) | 2003-10-29 | 2004-09-21 | Brake System, Especially for Utility Vehicles |
EP04786975A EP1678021A1 (de) | 2003-10-29 | 2004-09-21 | Bremsanlage, insbesondere für nutzfahrzeuge |
JP2006537088A JP2007516126A (ja) | 2003-10-29 | 2004-09-21 | 多用途車用のブレーキ系 |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE10350560.1 | 2003-10-29 | ||
DE10350560A DE10350560A1 (de) | 2003-10-29 | 2003-10-29 | Bremsanlage, insbesondere für Nutzfahrzeuge |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2005051739A1 true WO2005051739A1 (de) | 2005-06-09 |
Family
ID=34529894
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/EP2004/010565 WO2005051739A1 (de) | 2003-10-29 | 2004-09-21 | Bremsanlage, insbesondere für nutzfahrzeuge |
Country Status (5)
Country | Link |
---|---|
US (1) | US20070273201A1 (de) |
EP (1) | EP1678021A1 (de) |
JP (1) | JP2007516126A (de) |
DE (1) | DE10350560A1 (de) |
WO (1) | WO2005051739A1 (de) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP2256011A3 (de) * | 2009-05-20 | 2013-11-13 | WABCO GmbH | Bremsanlage für ein Fahrzeug, Verfahren zum Betreiben einer Bremsanlage und Ventileinrichtung für die Bremsanlage |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US10850716B2 (en) | 2018-05-31 | 2020-12-01 | Bendix Commercial Vehicle Systems Llc | System and method for controlling an automated braking application |
CN118238785A (zh) * | 2022-12-29 | 2024-06-25 | 比亚迪股份有限公司 | 动力底盘域架构和车辆 |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2811345A1 (de) * | 1978-03-16 | 1979-09-27 | Knorr Bremse Gmbh | Druckregler fuer pneumatische druecke, insbesondere in fahrzeugen |
DE3213281A1 (de) * | 1982-04-08 | 1983-10-13 | Knorr-Bremse GmbH, 8000 München | Zweikreis-motorwagenbremsanlage |
DE19947753A1 (de) * | 1999-10-02 | 2001-04-19 | Daimler Chrysler Ag | Druckluftbetätigte Bremseinrichtung |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE4406235A1 (de) * | 1994-02-25 | 1995-08-31 | Wabco Vermoegensverwaltung | Druckregeleinrichtung |
JPH0911871A (ja) * | 1995-06-29 | 1997-01-14 | Honda Motor Co Ltd | 車両のブレーキ力配分制御方法 |
-
2003
- 2003-10-29 DE DE10350560A patent/DE10350560A1/de not_active Withdrawn
-
2004
- 2004-09-21 JP JP2006537088A patent/JP2007516126A/ja active Pending
- 2004-09-21 EP EP04786975A patent/EP1678021A1/de not_active Withdrawn
- 2004-09-21 WO PCT/EP2004/010565 patent/WO2005051739A1/de active Search and Examination
- 2004-09-21 US US10/577,509 patent/US20070273201A1/en not_active Abandoned
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2811345A1 (de) * | 1978-03-16 | 1979-09-27 | Knorr Bremse Gmbh | Druckregler fuer pneumatische druecke, insbesondere in fahrzeugen |
DE3213281A1 (de) * | 1982-04-08 | 1983-10-13 | Knorr-Bremse GmbH, 8000 München | Zweikreis-motorwagenbremsanlage |
DE19947753A1 (de) * | 1999-10-02 | 2001-04-19 | Daimler Chrysler Ag | Druckluftbetätigte Bremseinrichtung |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP2256011A3 (de) * | 2009-05-20 | 2013-11-13 | WABCO GmbH | Bremsanlage für ein Fahrzeug, Verfahren zum Betreiben einer Bremsanlage und Ventileinrichtung für die Bremsanlage |
Also Published As
Publication number | Publication date |
---|---|
DE10350560A1 (de) | 2005-06-02 |
EP1678021A1 (de) | 2006-07-12 |
US20070273201A1 (en) | 2007-11-29 |
JP2007516126A (ja) | 2007-06-21 |
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