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1. WO1996005089 - A COPY VALVE FOR AN ANTI-LOCK BRAKE SYSTEM

Publication Number WO/1996/005089
Publication Date 22.02.1996
International Application No. PCT/US1995/009908
International Filing Date 04.08.1995
Chapter 2 Demand Filed 08.03.1996
IPC
B60T 8/34 2006.01
BPERFORMING OPERATIONS; TRANSPORTING
60VEHICLES IN GENERAL
TVEHICLE 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
8Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force
32responsive to a speed condition, e.g. acceleration or deceleration
34having a fluid pressure regulator responsive to a speed condition
B60T 8/42 2006.01
BPERFORMING OPERATIONS; TRANSPORTING
60VEHICLES IN GENERAL
TVEHICLE 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
8Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force
32responsive to a speed condition, e.g. acceleration or deceleration
34having a fluid pressure regulator responsive to a speed condition
42having expanding chambers for controlling pressure
CPC
B60T 8/341
BPERFORMING OPERATIONS; TRANSPORTING
60VEHICLES IN GENERAL
TVEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL
8Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force
32responsive to a speed condition, e.g. acceleration or deceleration
34having a fluid pressure regulator responsive to a speed condition
341Systems characterised by their valves
B60T 8/347
BPERFORMING OPERATIONS; TRANSPORTING
60VEHICLES IN GENERAL
TVEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL
8Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force
32responsive to a speed condition, e.g. acceleration or deceleration
34having a fluid pressure regulator responsive to a speed condition
343Systems characterised by their lay-out
344Hydraulic systems
3473 Channel systems
B60T 8/4275
BPERFORMING OPERATIONS; TRANSPORTING
60VEHICLES IN GENERAL
TVEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL
8Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force
32responsive to a speed condition, e.g. acceleration or deceleration
34having a fluid pressure regulator responsive to a speed condition
42having expanding chambers for controlling pressure ; , i.e. closed systems
4275Pump-back systems
Applicants
  • KELSEY HAYES COMPANY [US/US]; 11878 Hubbard Drive Livonia, MI 48150, US
Inventors
  • EVERY, Peter; US
  • SIVULKA, Gerald; US
  • FULLER, Edward, N.; US
Agents
  • MOLNAR, John, B.; MacMillan, Sobanski & Todd Fourth floor One Maritime Plaza 720 Water Street Toledo, OH 43604, US
Priority Data
08/291,28916.08.1994US
Publication Language English (EN)
Filing Language English (EN)
Designated States
Title
(EN) A COPY VALVE FOR AN ANTI-LOCK BRAKE SYSTEM
(FR) SOUPAPE REPRODUCTRICE POUR SYSTEME DE FREINAGE ANTIBLOCAGE
Abstract
(EN)
A copy valve (10) for an anti-lock brake system. The copy valve (10) has a housing (110, 172) enclosing four chambers (114, 116, 112, 118; 188, 202, 190, 196). A first (114, 188) and fourth (118, 196) chamber of the enclosed four chambers receives pressurized fluid directly from the first and second cylinders of a dual master brake cylinder (18). The third chamber (112, 190) receives the pressure of the (electronically) controlled brake actuator (28) while the second chamber (116) is connected to the uncontrolled brake actuator (36). In one embodiment, a single piston (178) is enclosed in the housing (172) and the first (188) and second (202) chambers are disposed at the opposite ends of the piston (178). The piston (178) has an enlarged collar (179) intermediate the two ends which is received in an annular recess (177) provided in the housing (172). The third chamber (190) is formed between a first face (194) of the piston's enlarged collar (179) and the annular recess (177) while the fourth chamber (196) is formed between the opposite face (198) of the piston's enlarged collar (179) and the adjacent face (200) of the housing (172). A throughbore (214) is provided through the piston (178) connecting the first (188) and second (202) chambers. A valve (218, 220) disposed in the throughbore (214) is open when the piston is in the second chamber (202) and closed when the piston is displaced from the second chamber (202). In another embodiment, the copy valve (10) comprises two separate pistons (140, 150) each interacting with a valve element (146; 158, 162).
(FR)
Soupape reproductrice (10) pour système de freinage antiblocage comprenant un boîtier (110, 172) qui renferme quatre chambres (114, 116, 112, 118, 188, 202, 190, 196). La première (114, 188) et la quatrième de ces chambres reçoivent le fluide sous pression directement du premier et du deuxième cylindre du maître cylindre de frein (18) à deux chambres. La troisième (112, 190), reçoit la pression de la commande (28) de freinage à contrôle électronique tandis que la seconde (116), est reliée à une commande de frein sans contrôle électronique. Dans l'une des variantes, le boîtier (172) ne renferme qu'un piston (178) et la première et la seconde chambres (188, 202) sont prévues aux extrémités opposées du piston (178). Ledit piston (178) présente entre ses extrémités un renflement circulaire (179) qui vient se placer dans un évidement annulaire (177) pratiqué dans le boîtier (172). La troisième chambre (190) se trouve entre la première face du renflement (179) et l'évidement annulaire (177), et la quatrième entre la face opposée (198) du renflement (179) du piston et la face contiguë du boîtier (172). Un passage (214) traversant le piston (178) relie la première chambre (188) à la seconde (202). Une soupape (218, 220) placée dans le passage (214), est ouverte lorsque le piston est dans la deuxième chambre, et fermée lorsqu'il en (202) sort. Dans une autre variante, la soupape reproductrice (10) comporte deux pistons séparés (140, 150) interagissant avec un élément de soupape (146, 158, 162).
Also published as
Latest bibliographic data on file with the International Bureau