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1. WO1999000279 - ALGORITHM FOR TESTING ROAD SURFACE WITH A SMALL PRESSURE RELEASE IN AN ANTI-LOCK BRAKE SYSTEM

Publication Number WO/1999/000279
Publication Date 07.01.1999
International Application No. PCT/US1998/013274
International Filing Date 26.06.1998
IPC
B60T 8/172 2006.1
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
17Using electrical or electronic regulation means to control braking
172Determining control parameters used in the regulation, e.g. by calculations involving measured or detected parameters
CPC
B60T 2210/12
BPERFORMING OPERATIONS; TRANSPORTING
60VEHICLES IN GENERAL
TVEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL
2210Detection or estimation of road or environment conditions; Detection or estimation of road shapes
10Detection or estimation of road conditions
12Friction
B60T 2210/124
BPERFORMING OPERATIONS; TRANSPORTING
60VEHICLES IN GENERAL
TVEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL
2210Detection or estimation of road or environment conditions; Detection or estimation of road shapes
10Detection or estimation of road conditions
12Friction
124Roads with different friction levels
B60T 8/172
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
17Using electrical or electronic regulation means to control braking
172Determining control parameters used in the regulation, e.g. by calculations involving measured or detected parameters
Applicants
  • KELSEY-HAYES COMPANY [US]/[US] (AllExceptUS)
  • ATKINS, Thomas, M. [US]/[US] (UsOnly)
Inventors
  • ATKINS, Thomas, M.
Agents
  • MOLNAR, John, B.
Priority Data
60/051,11727.06.1997US
Publication Language English (en)
Filing Language English (EN)
Designated States
Title
(EN) ALGORITHM FOR TESTING ROAD SURFACE WITH A SMALL PRESSURE RELEASE IN AN ANTI-LOCK BRAKE SYSTEM
(FR) ALGORITHME DESTINE A TESTER LA CHAUSSEE AVEC UNE FAIBLE REDUCTION DE PRESSION DANS UN SYSTEME DE FREIN ANTIBLOCAGE
Abstract
(EN) Upon detection of a potential transition from a low mu road surface to a high mu road surface, a rear wheel anti-lock brake system generates one dump pulse to increase the braking effort of the controller rear wheel as a test of the road surface. If the wheel accelerates following the test pulse, the transition is false and the anti-lock brake system continues as before. If the wheel does not accelerate following the test pulse, the transition is true and the anti-lock brake system proceeds to increase the braking effort of the controlled wheel brake.
(FR) Après détection d'une transition de potentiel d'une chaussée à mu faible à une chaussée à mu élevé, un système de frein antiblocage, sur roue arrière, génère une impulsion de décharge pour augmenter l'effort de freinage appliqué par le contrôleur sur la roue arrière en tant que test de la chaussée. Si la roue accélère après l'impulsion de test, la transition est fausse et le système de frein antiblocage continue comme avant. Si la roue n'accélère pas après l'impulsion de test, la transition est vraie et le système de frein antiblocage augmente l'effort de freinage du frein sur roue régulé.
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