Device and method for improving the performance of an antilock braking and Anti-slip regulation of a vehicle

Abstract

Device for improving the performance of an antilock braking (ABS) and / or anti-slip regulation (ASR) and / or electronic stability control (ESC) system of a vehicle comprising at least a fluid-dynamic system for controlling the braking pressure composed of at least one standard ABS management control unit and a brake-servo unit and a fluid pressure pump, solenoid valves connected to pipes for oil orair and at least phonic wheels and tachometer sensors respectively present one for each wheel of the vehicle, the device comprises additional intelligent sensors associated with at least one of the braking pads acting upon the braking disk of each wheel in order to collect additional data and at least one dedicated ECU control unit for managing said additional data and interacting with at least said ABS control unit. The method consists in detecting, by means of the pad and the dedicated control unit, the actual value of the tire-ground coefficient of friction that is constantly updated duringbraking using the braking torque data derived from the braking pad in order to adjust the braking pressure profile to the value of the actual coefficient of friction present between the tire and theground during the braking of the vehicle.

Description

technical field [0001] As is well known, the anti-lock braking system (ABS) is designed to avoid locking of the wheels of the vehicle in response to excessive actuation of the service brake, especially on slippery surfaces, thus ensuring the driving of any type of vehicle within the limits of physical possibility Take control. Background technique [0002] Furthermore, in the case of the ABS system, the utilization of the adhesion between the tires and the ground is improved, thus optimizing the vehicle's deceleration characteristics and braking distances. [0003] It should also be taken into account that during a braking event on a slippery surface, the braking force transmitted by the braking system to the wheels of the vehicle tends to exceed the value of the friction force between the tire and the ground due to the reduced value of the friction force between the tire and the ground, The result is wheel lock. [0004] In this case the tires slide against the ground pur...

AI Technical Summary

Problems solved by technology

However, this method has not yet had a practical application, especially considering the fact that the measurable forces are extremely small compared to the forces acting on the wheels while driving the vehicle and thus almost impossible to detect accurately, the data collected are major error

This problem can also occur with force sensors (accelerometers) associated with tires, where the longitudinal force is large but there is considerable uncertainty associated with the collected data due to tire wear

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