Method for training switching parameters of a magnetic control valve in a vehicle braking system and braking system

Abstract

The invention relates to a method for training switching parameters of magnetic control valves (9a, 9b, 10a, 10b) in a braking system (1) of a vehicle (3), the method having at least the following steps: - determining the vehicle test acceleration; - learning At least two test pulse sequences (PF1, PF2), wherein the test pulses are determined in dependence on the determined vehicle test acceleration and on the initial value of the switching parameter for the respective magnetic control valve (9a, 9b, 10a, 10b), respectively sequence (PF1, PF2), and the test pulse sequence (PF1, PF2) has actuation pulses and non-actuation pulses, wherein the respective magnetic control valves (9a, 9b, 10a, 10b) are enabled during the actuation pulses, and Deactivate the respective magnetic control valve (9a, 9b, 10a, 10b) during the non-actuation pulse, - actuate the magnetic control valve (9a, 9b, 10a, 10b) with at least two test pulse sequences (PF1, PF2) to bring about at least two test brakes, wherein the brake pressure (pBa, pBb) on the service brakes (5a, 5b) of the brake system (1) is brought about by a respective test pulse sequence (PF1, PF2) change, so as to obtain the change of the driving dynamics (w, w1, w2) of the vehicle (3), and obtain the driving dynamics variation to detect the vehicle ( 3) changes in the driving dynamics (w1, w2), and - adjust the switching parameter initial values ​​for the magnetic control valves (9a, 9b, 10a, 10b) in order to train the magnetic control valves (9a, 9b, 10a, 10b) switching parameters.

Description

technical field [0001] The invention relates to a method for training switching parameters of a magnetic control valve in a vehicle braking system and to a braking system with a magnetic control valve, which is suitable for carrying out the method. Background technique [0002] Service brake systems are known as pneumatic or hydraulic operating systems, which can also distribute specific brake pressures to the brake cylinders of the service brake in an electrically controlled manner via corresponding modulators. For this purpose, magnetic control valves are arranged in the modulators which are arranged upstream of the respective brake cylinders of the respective service brakes, via which brake pressures can be built up in the respective brake cylinders as a function of the control signal . For this purpose, the stored pressure from the pressure medium store can be fed into the brake cylinder via an inlet valve designed as a magnetic control valve, in order to increase the b...

AI Technical Summary

Problems solved by technology

The disadvantage is that tolerances in the brake system of the vehicle in which such magnetic control valves are installed, for example due to differently configured piping or volumes of the brake cylinders, are not taken into account and thus cannot be compensated for.

[0009] The disadvantage is that the switching parameters of the magnetic control valve upstream of the service brake in the modulator cannot be deduced even if the response pressure of the service brake is known

However, this may differ slightly from the actual switching parameters, for example due to the environment or due to the design of the current braking system, which may lead to an inaccurate actuation of the service brakes, e.g. undesirably asymmetric drive

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