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1. WO2020057892 - METHOD FOR ASCERTAINING THE BACKLASH OF A GEAR

Publication Number WO/2020/057892
Publication Date 26.03.2020
International Application No. PCT/EP2019/072475
International Filing Date 22.08.2019
IPC
G01M 13/021 2019.01
GPHYSICS
01MEASURING; TESTING
MTESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
13Testing of machine parts
02Gearings; Transmission mechanisms
021Gearings
CPC
B60T 8/173
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
173Eliminating or reducing the effect of unwanted signals, e.g. due to vibrations or electrical noise
B60T 8/176
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
176Brake regulation specially adapted to prevent excessive wheel slip during vehicle deceleration, e.g. ABS
F16H 61/12
FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
HGEARING
61Control functions within ; control units of; change-speed- or reversing-gearings for conveying rotary motion ; ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing
12Detecting malfunction or potential malfunction, e.g. fail safe
G01M 13/02
GPHYSICS
01MEASURING; TESTING
MTESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
13Testing of machine parts
02Gearings; Transmission mechanisms
G01M 13/021
GPHYSICS
01MEASURING; TESTING
MTESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
13Testing of machine parts
02Gearings; Transmission mechanisms
021Gearings
G01M 7/02
GPHYSICS
01MEASURING; TESTING
MTESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
7Vibration-testing of structures; Shock-testing of structures
02Vibration-testing ; by means of a shake table
Applicants
  • ROBERT BOSCH GMBH [DE]/[DE]
Inventors
  • RIES-MUELLER, Klaus
Priority Data
10 2018 215 894.019.09.2018DE
Publication Language German (DE)
Filing Language German (DE)
Designated States
Title
(DE) VERFAHREN ZUR ERMITTLUNG DES GETRIEBESPIELES EINES GETRIEBES
(EN) METHOD FOR ASCERTAINING THE BACKLASH OF A GEAR
(FR) PROCÉDÉ PERMETTANT DE DÉTERMINER LE JEU D'UNE TRANSMISSION
Abstract
(DE)
Die Erfindung bezieht sich auf ein Verfahren zur Ermittlung des Getriebespieles (40) eines Getriebes (24), welches mit einer E-Maschine (12) eines mindestens eine E-Maschine (12) aufweisenden Fahrzeugs gekoppelt ist, wobei zumindest die nachfolgenden Verfahrensschritte durchlaufen werden: a) Erfassung der Drehzahl der mindestens einen E-Maschine (12) bei einem Fahreingriff (80) und Erfassung aus diesem hervorgehender Drehzahlschwankungen, b) Auswertung einer hochfrequenten Schwingung (60), erzeugt durch Erreichen eines unteren Anschlages (54) durch das Getriebe (24) bei Verzögerungsphasen (56) und Erreichen eines oberen Anschlages (50) durch das Getriebe (24) bei Drehrichtungsumkehr bei Beschleunigungsphasen (58), c) Ausfilterung hochfrequenter Anteile aus der hochfrequenten Schwingung (60) gemäß b), bei deren Auftreten aus dem Drehzahlsignal eine Lageinformation (42) hinsichtlich eines zugehörigen Drehwinkels gespeichert wird, d) Auswertung eines Abstandes zwischen dem oberen Anschlag (52) und dem unteren Anschlag (54) und Ermittlung des Getriebespieles (40) aus der Differenz der Lageinformationen (42) zwischen dem oberen Anschlag (52) und dem unteren Anschlag (54).
(EN)
The invention relates to a method for ascertaining the backlash (40) of a gear (24) which is coupled to an electric machine (12) of a vehicle which has at least one electric machine (12). According to the method, at least the following steps are carried out: a) detecting the rotational speed of the at least one electric machine (12) during a driving intervention (80) and detecting rotational speed fluctuations produced therefrom, b) evaluating a high-frequency vibration (60) which is generated as a result of the gear (24) reaching a lower stop (54) in delay phases (56) and reaching an upper stop (50) when reversing the rotational direction in acceleration phases (58), c) filtering out high-frequency components from the high-frequency vibration (60) according to step b), wherein position information (42), relating to a corresponding rotational angle, from the rotational speed signal is saved in the event said components occur, and d) evaluating the distance between the upper stop (52) and the lower stop (54) and ascertaining the backlash (40) from the difference of the position information (42) between the upper stop (52) and the lower stop (54).
(FR)
L'invention concerne un procédé permettant de déterminer le jeu (40) d'une transmission (24), laquelle est accouplée à un moteur électrique (12) d'un véhicule comprenant au moins un moteur électrique (12). Selon le procédé, au moins les étapes suivantes sont effectuées : a) détection du régime dudit au moins un moteur électrique (12) lors d'une intervention (80) du conducteur et détection de fluctuations de régime résultant de celle-ci, b) évaluation d'une vibration (60) haute fréquence, produite lorsque la transmission (24) atteint une butée inférieure (54) lors de phases de ralentissement (56) et lorsque la transmission (24) atteint une butée supérieure (50) en cas d'inversion du sens de rotation lors de phases d'accélération (58), c) filtrage de composantes haute fréquence à partir de la vibration (60) haute fréquence selon b), lors de l'apparition desquelles une information de position (42) relative à un angle de rotation associé est enregistrée à partir du signal de régime, d) évaluation d'une distance entre la butée supérieure (52) et la butée inférieure (54) et détermination du jeu de transmission (40) à partir de la différence des informations de position (42) entre la butée supérieure (52) et la butée inférieure (54).
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