EP0187848A1 - Dispositif de freinage pour vehicules a moteur - Google Patents
Dispositif de freinage pour vehicules a moteurInfo
- Publication number
- EP0187848A1 EP0187848A1 EP19850903822 EP85903822A EP0187848A1 EP 0187848 A1 EP0187848 A1 EP 0187848A1 EP 19850903822 EP19850903822 EP 19850903822 EP 85903822 A EP85903822 A EP 85903822A EP 0187848 A1 EP0187848 A1 EP 0187848A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- pressure
- brake
- brake cylinder
- wheel
- vehicle
- 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- Withdrawn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
- 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
- B60T8/344—Hydraulic systems
- B60T8/345—Hydraulic systems having more than one brake circuit per wheel
-
- 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
-
- 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
- B60T8/321—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 deceleration
- B60T8/3225—Systems specially adapted for single-track vehicles, e.g. motorcycles
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
- B62L—BRAKES SPECIALLY ADAPTED FOR CYCLES
- B62L3/00—Brake-actuating mechanisms; Arrangements thereof
- B62L3/02—Brake-actuating mechanisms; Arrangements thereof for control by a hand lever
- B62L3/023—Brake-actuating mechanisms; Arrangements thereof for control by a hand lever acting on fluid pressure systems
Definitions
- the invention relates to a motor vehicle brake system according to the preamble of the main claim.
- the braked vehicle wheels block as soon as they can no longer transmit the applied braking force completely to the road. Locking wheels impair the driving stability and the steerability of the vehicle. De3 further extends the braking distance.
- the stepped piston of the master brake cylinder with its different pressure areas allows the pressure in the brake circuit to be regulated independently of the force actually applied by the driver.
- the step-by-step connection of the individual effective pressure areas gradually reduces the pressure in the wheel brake cylinder if the vehicle wheel tends to lock. If the road conditions change, that is to say the grip changes, for example due to the transition from a snow-slick road to a dry road, the brake pressure in the wheel brake cylinders can be gradually built up again by successively locking the individual pressure surfaces.
- control valves are provided as control means, which are controlled by an electronic computing unit.
- Speed sensors attached to the respective vehicle wheel, provide the computing unit with a signal corresponding to the circumferential deceleration of the vehicle wheel.
- the control valves which are assigned to the individual pressure stages, normally block the connection between the pressure stage and the wheel brake cylinder. When the control valve is switched over by the computing unit, the flow is released. Since at Brakes and when the valve is locked in the individual pressure stages brake fluid is displaced, this must be fed via a return to a reservoir. However, this return must be blocked during the pressure connection to the wheel brake cylinder. This function is also performed in a simple manner by the control valve. It is therefore advisable to design the ' control valves as 4/2-way valves.
- the drawing shows in the single figure the schematic radar position of a brake system for a motorcycle and more precisely, the part of the brake system that is used to brake the front wheel. From the drawing, a stepped piston 1 can be seen, which is part of a master brake cylinder, not shown.
- a manually operated brake lever 2 moves the stepped piston 1 in the axial direction when it is actuated in the direction of the force arrow 3, as is to be indicated by the arrow 4.
- the hand brake lever 2 is pivotally articulated on a bearing block 5.
- the step piston 1 provides three steps with effective
- a brake line 9, 10, 11 leads from each pressure stage assigned to the respective pressure surface 6, 7, 8 to the wheel brake cylinder of the front wheel.
- the brake line 9 of the smallest pressure area 8 leads directly to the wheel brake cylinder.
- the other two brake lines take their way via control valves 13, 14.
- the control valves 13, 14 are designed as electromagnetically actuated 4/2-way valves. In their non-excited state, they block the flow of the brake lines 10 and 11 to the wheel brake cylinder.
- the brake shoe 12 works together with a brake disc 21.
- Control lines 25, 26 go from the computing unit 24 to the control valves 13, 1.
- the brake system works as follows:
- the stepped piston 1 moves in the direction of the arrow 4.
- a corresponding pressure builds up in the pressure stage which is assigned to the pressure surface 6 and propagates via the brake line 9 to the wheel brake cylinder.
- the brake shoe 12 bears against the brake disc 21 with a force which is derived from the ratio of the area of the brake cylinder and the pressure surface 6 results. No pressure can build up in the two remaining pressure stages, since the oil displaced by the stage piston 1 flows back into the reservoir 17 via the return lines 15, 16.
- the vehicle is decelerated by braking. If the circumferential deceleration of the vehicle wheel now falls below a defined threshold, which the computing unit 24 recognizes via the speed sensor 22, the computing unit 24 switches the control valve 13. As a result, the return line 15 is now blocked and the brake line 10 is opened. The pressure area 7 is added to the pressure area 6, so that overall the ratio between the brake cylinder area and the effective pressure area on the stepped piston 1 becomes smaller. The result is a pressure drop in the brake circuit. The brake shoe is accordingly pressed against the brake disk 21 with less force. If this pressure drop is not sufficient, the computing unit also switches the control valve 14 so that the effective pressure area on the step piston is increased by the pressure area 8. This lowers the pressure in the brake circuit again.
- the computer generally switches the control valve 14 back to the initial state after a short time.
- the braking force on the wheel brake cylinder increases again. If the vehicle wheel tends to lock again as a result, the computer switches the control valve 14 again.
- the computing unit also blocks the control valve 13 and waits again for a blocking signal from the speed sensor 22. If such a signal does not come, this stage also remains closed. The maximum pressure that can be applied is thus applied to the wheel brake cylinder.
- control valve 13 is opened again and possibly also the control valve 14.
- Such a vehicle brake system is not limited to motorcycles. It can also be used for other motor vehicles, in particular passenger cars.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Transportation (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Regulating Braking Force (AREA)
Abstract
Un dispositif de freinage pour véhicules à moteur comprend un cylindre de frein principal et un piston différentiel (1). Le piston différentiel (1) présente plusieurs surfaces de pression utiles (6, 7, 8) qui peuvent être connectées ou déconnectées selon les besoins par des dispositifs de commande appropriés (servo-soupapes 13, 14). Ce dispositif permet de régler la pression dans la conduite du frein indépendamment de la puissance fournie par le piston différentiel (1). Il permet d'empêcher dans une large mesure que les roues des véhicules ne se bloquent.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19843426612 DE3426612A1 (de) | 1984-07-19 | 1984-07-19 | Kraftfahrzeugbremsanlage |
DE3426612 | 1984-07-19 |
Publications (1)
Publication Number | Publication Date |
---|---|
EP0187848A1 true EP0187848A1 (fr) | 1986-07-23 |
Family
ID=6241039
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP19850903822 Withdrawn EP0187848A1 (fr) | 1984-07-19 | 1985-07-19 | Dispositif de freinage pour vehicules a moteur |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP0187848A1 (fr) |
DE (1) | DE3426612A1 (fr) |
WO (1) | WO1986000859A1 (fr) |
Families Citing this family (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE4015745A1 (de) * | 1989-10-06 | 1991-04-18 | Teves Gmbh Alfred | Blockiergeschuetzte, hydraulische bremsanlage |
DE19501487C2 (de) * | 1995-01-19 | 1997-07-03 | Deinlein Kalb Hans | Einrichtung zur kombinierten Antiblockier- und Antriebsschlupfregelung für Motorräder |
US6161903A (en) * | 1997-04-18 | 2000-12-19 | Lucas Industries Public Limited Company | Brake-pressure-transmitter arrangement for a hydraulic motor-vehicle brake system, and brake system equipped therewith |
DE19716404C1 (de) * | 1997-04-18 | 1998-10-29 | Lucas Automotive Gmbh | Hydraulische Bremsanlage für Kraftfahrzeuge |
JP4320968B2 (ja) * | 2000-05-02 | 2009-08-26 | トヨタ自動車株式会社 | ブレーキシステム |
US20070278853A1 (en) * | 2004-02-06 | 2007-12-06 | Continental Teves Ag & Co. Ohg | Motorcycle Brake System |
DE102004046940A1 (de) * | 2004-02-06 | 2005-08-25 | Continental Teves Ag & Co. Ohg | Kraftradbremsanlage |
DE102011008928A1 (de) * | 2011-01-20 | 2012-07-26 | Audi Ag | Bremsanlage für Kraftfahrzeug, insbesondere für Hybridfahrzeug |
DE102014208107A1 (de) * | 2014-04-29 | 2015-10-29 | Hema Maschinen- Und Apparateschutz Gmbh | Klemm- und/oder Bremsvorrichtung |
Family Cites Families (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR778690A (fr) * | 1935-01-04 | 1935-03-22 | Freins Jourdain Monneret | Dispositif de réglage des freins à fluide (air, vide ou liquide) permettant de proportionner l'effort de freinage à la charge des véhicules |
FR1435064A (fr) * | 1965-03-02 | 1966-04-15 | Ferodo Sa | Perfectionnements apportés aux freins hydrauliques, notamment pour véhicules automobiles |
DE1780416A1 (de) * | 1968-09-13 | 1972-02-03 | Roessner Hans Dipl Ing | Stufenkolben-Hauptbremszylinder fuer Zweikreisbremsen von Kraftfahrzeugen |
US3999807A (en) * | 1970-10-06 | 1976-12-28 | Tetsuo Haraikawa | Dual network hydraulic brake system |
GB1341338A (en) * | 1971-06-14 | 1973-12-19 | Fiat Spa | Anti-skid braking systems |
FR2141595B1 (fr) * | 1971-06-18 | 1974-03-08 | Dba | |
DE2355541A1 (de) * | 1973-11-07 | 1975-05-15 | Knorr Bremse Gmbh | Ventileinrichtung zur steuerung von druckmittelbetaetigten bremsen, insbesondere fuer schienenfahrzeuge |
CH593161A5 (fr) * | 1975-06-20 | 1977-11-30 | Oerlikon Buehrle Ag | |
NO790918L (no) * | 1978-05-09 | 1979-11-12 | Oerlikon Buehrle Ag | Pneumatisk kjoeretoeybremseinnretning |
-
1984
- 1984-07-19 DE DE19843426612 patent/DE3426612A1/de active Granted
-
1985
- 1985-07-19 EP EP19850903822 patent/EP0187848A1/fr not_active Withdrawn
- 1985-07-19 WO PCT/EP1985/000358 patent/WO1986000859A1/fr unknown
Non-Patent Citations (1)
Title |
---|
See references of WO8600859A1 * |
Also Published As
Publication number | Publication date |
---|---|
DE3426612C2 (fr) | 1988-07-28 |
WO1986000859A1 (fr) | 1986-02-13 |
DE3426612A1 (de) | 1986-01-30 |
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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 |
|
AK | Designated contracting states |
Kind code of ref document: A1 Designated state(s): AT BE CH FR GB IT LI LU NL SE |
|
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: 19860624 |