DE102006019904B4 - Method for setting the translation of a transmission comprising a variator when driving backwards - Google Patents

Method for setting the translation of a transmission comprising a variator when driving backwards Download PDF

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Publication number
DE102006019904B4
DE102006019904B4 DE102006019904.9A DE102006019904A DE102006019904B4 DE 102006019904 B4 DE102006019904 B4 DE 102006019904B4 DE 102006019904 A DE102006019904 A DE 102006019904A DE 102006019904 B4 DE102006019904 B4 DE 102006019904B4
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Germany
Prior art keywords
variator
reversing
speed
transmission
setting
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Expired - Fee Related
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DE102006019904.9A
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German (de)
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DE102006019904A1 (en
Inventor
Holger Bacher
Bernd Löffler
Thies Hameister
Peter Spörl
Ewald Willecke
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ZF Friedrichshafen AG
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ZF Friedrichshafen AG
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Priority to DE102006019904.9A priority Critical patent/DE102006019904B4/en
Publication of DE102006019904A1 publication Critical patent/DE102006019904A1/en
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Expired - Fee Related legal-status Critical Current
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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • F16H61/00—Control 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
    • F16H61/66—Control 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 specially adapted for continuously variable gearings
    • F16H61/662—Control 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 specially adapted for continuously variable gearings with endless flexible members
    • F16H61/66254—Control 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 specially adapted for continuously variable gearings with endless flexible members controlling of shifting being influenced by a signal derived from the engine and the main coupling
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • F16H63/00—Control outputs from the control unit to change-speed- or reversing-gearings for conveying rotary motion or to other devices than the final output mechanism
    • F16H63/40—Control outputs from the control unit to change-speed- or reversing-gearings for conveying rotary motion or to other devices than the final output mechanism comprising signals other than signals for actuating the final output mechanisms
    • F16H63/50—Signals to an engine or motor
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
    • B60W2520/00—Input parameters relating to overall vehicle dynamics
    • B60W2520/06—Direction of travel
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • F16H61/00—Control 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
    • F16H61/02—Control 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 characterised by the signals used
    • F16H61/0202—Control 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 characterised by the signals used the signals being electric
    • F16H61/0204—Control 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 characterised by the signals used the signals being electric for gearshift control, e.g. control functions for performing shifting or generation of shift signal
    • F16H61/0246—Control 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 characterised by the signals used the signals being electric for gearshift control, e.g. control functions for performing shifting or generation of shift signal characterised by initiating reverse gearshift

Abstract

Verfahren zur Einstellung der Übersetzung bei Rückwärtsfahrt eines einen Variator umfassenden Getriebes, welches zur Drehrichtungsumkehr eine ins Langsame übersetzende Zahnradanordnung aufweist, dadurch gekennzeichnet, dass bei Rückwärtsfahrt eine Veränderung der Übersetzung des Variators des Getriebes ins Schnelle durchgeführt wird.Method for setting the gear ratio when reversing a transmission comprising a variator, which has a gear arrangement which translates into slow gear for reversing the direction of rotation, characterized in that the gear ratio of the variator of the transmission is changed at high speed when reversing.

Description

Die Erfindung betrifft ein Verfahren zur Einstellung der Übersetzung eines einen Variator umfassenden Getriebes bei Rückwärtsfahrt, gemäß dem Oberbegriff des Patentanspruchs 1.The invention relates to a method for setting the gear ratio of a transmission comprising a variator when reversing, according to the preamble of claim 1.

Bei stufenlos verstellbaren Getrieben ist zum Wechsel der Fahrtrichtung im Allgemeinen eine geeignete Anordnung von Zahnrädern mit konstanter Übersetzung vorgesehen. Bei CVT-Getrieben ist dies beispielsweise ein dem Variator vor- oder nachgeschalteter Planetensatz, der üblicherweise als Einfach- oder Doppelplanetensatz ausgeführt ist. Hierbei kann der Variator ein Umschlingungsmittel (Schubgliederband, Kette) aufweisen oder als Toroid-Variator ausgeführt sein. Bei Vorwärtsfahrt wird im Allgemeinen die Anordnung zur Fahrtrichtungsumkehr überbrückt.In the case of continuously variable transmissions, a suitable arrangement of gear wheels with a constant ratio is generally provided for changing the direction of travel. In the case of CVT transmissions, this is, for example, a planetary set upstream or downstream of the variator, which is usually designed as a single or double planetary set. Here, the variator can have a looping means (push link belt, chain) or be designed as a toroidal variator. When driving forward, the arrangement for reversing the direction of travel is generally bypassed.

Bei Rückwärtsfahrt wird nach dem Stand der Technik der Variator in Stellung „LOW“ gehalten, wodurch die Geschwindigkeit ausschließlich über die Motordrehzahl eingestellt wird und somit nach oben hin durch die Abregeldrehzahl des Motors begrenzt ist. Dies ist bei aus konstruktiven Gründen vorgegebener Übersetzung der Anordnung zur Fahrtrichtungsumkehr ins Langsame (Einfach-Planetensatz als Anordnung zur Fahrtrichtungsumkehr) von Nachteil, da dadurch die gewohnten Geschwindigkeiten bei Rückwärtsfahrt nicht erreicht werden können. Ein weiterer Nachteil ist die Geräuschentwicklung, welche besonders stark ist, wenn die Anordnung zur Fahrtrichtungsumkehr vor dem Variator angeordnet ist, was in einer Beeinträchtigung des Fahrkomforts resultiert. Des weiteren werden die momentübertragenden Bauteile, die zwischen Variator und Abtrieb angeordnet sind, stark belastet.According to the state of the art, when reversing, the variator is kept in the "LOW" position, which means that the speed is set exclusively via the engine speed and is therefore limited upwards by the engine speed limit. This is disadvantageous in the case of a translation of the arrangement for reversing the direction of travel into slow speed (single planetary gear set as an arrangement for reversing the direction of travel), which is predetermined for structural reasons, since it means that the usual speeds cannot be achieved when reversing. Another disadvantage is the development of noise, which is particularly strong when the arrangement for reversing the direction of travel is arranged in front of the variator, which results in an impairment of the ride comfort. Furthermore, the torque-transmitting components, which are arranged between the variator and output, are heavily loaded.

Der vorliegenden Erfindung liegt die Aufgabe zugrunde, ein Verfahren zur Einstellung der Übersetzung eines einen Variator umfassenden Getriebes bei Rückwärtsfahrt anzugeben, durch dessen Durchführung eine Reduzierung der Belastung der zwischen Variator und Abtrieb angeordneten momentübertragenden Bauteile erzielt wird. Des weiteren soll die Geräuschentwicklung reduziert werden und das Erreichen gewohnter oder höherer Geschwindigkeiten bei Rückwärtsfahrt ermöglicht werden.The present invention is based on the object of specifying a method for setting the gear ratio of a transmission comprising a variator when driving backwards, through the implementation of which a reduction in the load on the torque-transmitting components arranged between the variator and output is achieved. Furthermore, the development of noise should be reduced and it should be possible to achieve normal or higher speeds when reversing.

Diese Aufgabe wird durch die Merkmale des Patentanspruchs 1 gelöst. Weitere erfindungsgemäße Ausgestaltungen und Vorteile gehen aus den Unteransprüchen hervor.This object is achieved by the features of claim 1. Further embodiments and advantages according to the invention emerge from the subclaims.

Demnach wird ein Verfahren zur Einstellung der Übersetzung eines einen Variator umfassenden Getriebes bei Rückwärtsfahrt vorgeschlagen, im Rahmen dessen bei Rückwärtsfahrt eine Veränderung der Übersetzung des Variators des Getriebes ins Schnelle durchgeführt wird.Accordingly, a method is proposed for setting the gear ratio of a transmission comprising a variator when driving backwards, in the context of which the gear ratio of the variator of the transmission is changed at high speed when driving backwards.

Dadurch werden die abtriebsseitigen Bauteile durch verringerte zu übertragende Momente bei vergleichbarem Fahrzustand geschützt. Insbesondere wird bei einer dem Variator nachgeschalteten Anordnung zur Fahrtrichtungsumkehr, bei Rückwärtsfahrt durch die erfindungsgemäß vorgeschlagene Veränderung der Übersetzung des Variators ins Schnelle, die Anordnung zur Fahrtrichtungsumkehr durch verringerte zu übertragende Momente bei vergleichbarem Fahrzustand geschützt.As a result, the components on the output side are protected by reduced torques to be transmitted in a comparable driving condition. In particular, in an arrangement for reversing the direction of travel downstream of the variator, when reversing, by changing the speed ratio of the variator as proposed according to the invention, the arrangement for reversing the direction of travel is protected by reduced torques to be transmitted in a comparable driving state.

Zusätzlich wird der Fahrkomfort durch die erfindungsgemäß erzielbare Reduzierung der Motordrehzahl in vorteilhafter Weise erhöht, da die Reduzierung der Motordrehzahl eine verminderte Geräuschentwicklung zur Folge hat.In addition, driving comfort is advantageously increased by the reduction in the engine speed that can be achieved according to the invention, since the reduction in the engine speed results in less noise being generated.

Ein weiterer Vorteil besteht darin, dass durch die Veränderung der Übersetzung des Variators ins Schnelle die gewohnte oder eine höhere Geschwindigkeit erreicht werden kann.Another advantage is that the usual speed or a higher speed can be achieved by changing the gear ratio of the variator.

Die Einstellung der Übersetzung bei Rückwärtsfahrt kann gemäß der Erfindung durch die Vorgabe einer Soll-Eingangsdrehzahl in Abhängigkeit von der Fahrgeschwindigkeit erfolgen.According to the invention, the gear ratio can be set when reversing by specifying a target input speed as a function of the driving speed.

Dies ist besonders vorteilhaft, wenn die Drehrichtungsumkehr durch ins Langsame übersetzte Zahnradanordnungen erfolgt, wie es beispielsweise bei einem dem Variator vor- oder nachgeschalteten Einfach-Planetenradsatz der Fall ist. Dadurch steht die Ausgangsdrehzahl am Variator bei Rückwärtsfahrt in vorteilhafter Weise nicht mehr in einem festen Verhältnis zur Motordrehzahl.This is particularly advantageous if the direction of rotation is reversed by means of gear arrangements that are stepped up, as is the case, for example, with a single planetary gear set upstream or downstream of the variator. As a result, the output speed at the variator is advantageously no longer in a fixed ratio to the engine speed when reversing.

Durch die vorgeschlagene Übersetzungsänderung bei Rückwärtsfahrt ins Schnelle werden gegebenenfalls zu hohe Fahrzeuggeschwindigkeiten erreicht. Aus diesem Grunde wird vorgeschlagen, zusätzlich zur Variatorverstellung einen Motoreingriff in Form einer fahrzeuggeschwindigkeitsabhängigen Motormomentenreduzierung durchzuführen. Hierbei wird z.B. mit zunehmender Geschwindigkeit das maximal zulässige Motormoment verringert, wodurch eine Begrenzung der Geschwindigkeit erreicht wird.The proposed change in gear ratio when reversing at high speed means that vehicle speeds that are too high may be reached. For this reason, it is proposed, in addition to the variator adjustment, to carry out an engine intervention in the form of a vehicle speed-dependent engine torque reduction. For example, the maximum permissible motor torque is reduced with increasing speed, which limits the speed.

Claims (4)

Verfahren zur Einstellung der Übersetzung bei Rückwärtsfahrt eines einen Variator umfassenden Getriebes, welches zur Drehrichtungsumkehr eine ins Langsame übersetzende Zahnradanordnung aufweist, dadurch gekennzeichnet, dass bei Rückwärtsfahrt eine Veränderung der Übersetzung des Variators des Getriebes ins Schnelle durchgeführt wird.Method for setting the translation when reversing a transmission comprising a variator, which has a gear arrangement which translates into slow gear for reversing the direction of rotation, characterized in that the transmission of the variator of the transmission is changed at high speed when reversing. Verfahren nach Anspruch 1, dadurch gekennzeichnet , dass die Einstellung der Übersetzung bei Rückwärtsfahrt durch die Vorgabe einer Soll-Eingangsdrehzahl in Abhängigkeit von der Fahrgeschwindigkeit erfolgt.Procedure according to Claim 1 , characterized in that the gear ratio is set when reversing by specifying a target input speed as a function of the driving speed. Verfahren nach Anspruch 1 oder 2, dadurch gekennzeichnet, dass zusätzlich zur Variatorverstellung ein Motoreingriff in Form einer fahrzeuggeschwindigkeitsabhängigen Motormomentenreduzierung durchgeführt wird.Procedure according to Claim 1 or 2 , characterized in that in addition to the variator adjustment, an engine intervention in the form of a vehicle speed-dependent engine torque reduction is carried out. Verfahren nach Anspruch 3, dadurch gekennzeichnet, dass mit zunehmender Geschwindigkeit das maximal zulässige Motormoment verringert wird, wodurch eine Begrenzung der Geschwindigkeit erreicht wird.Procedure according to Claim 3 , characterized in that the maximum permissible engine torque is reduced with increasing speed, whereby a limitation of the speed is achieved.
DE102006019904.9A 2006-04-28 2006-04-28 Method for setting the translation of a transmission comprising a variator when driving backwards Expired - Fee Related DE102006019904B4 (en)

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DE102006019904.9A DE102006019904B4 (en) 2006-04-28 2006-04-28 Method for setting the translation of a transmission comprising a variator when driving backwards

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DE102006019904.9A DE102006019904B4 (en) 2006-04-28 2006-04-28 Method for setting the translation of a transmission comprising a variator when driving backwards

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DE102006019904B4 true DE102006019904B4 (en) 2021-09-02

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Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3305924A1 (en) 1982-02-22 1983-09-01 Valeo, 75017 Paris POWER TRANSFER BETWEEN AN INPUT SHAFT AND A DRIVE SHAFT, IN PARTICULAR FOR MOTOR VEHICLES
DE19631294A1 (en) 1995-08-23 1997-02-27 Luk Getriebe Systeme Gmbh Vehicle hybrid transmission with continuously variable and other gears
DE10155372A1 (en) 2001-11-10 2003-05-22 Bosch Gmbh Robert System and method for specifying an engine torque and a transmission ratio in a vehicle with a continuously variable transmission

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3305924A1 (en) 1982-02-22 1983-09-01 Valeo, 75017 Paris POWER TRANSFER BETWEEN AN INPUT SHAFT AND A DRIVE SHAFT, IN PARTICULAR FOR MOTOR VEHICLES
DE19631294A1 (en) 1995-08-23 1997-02-27 Luk Getriebe Systeme Gmbh Vehicle hybrid transmission with continuously variable and other gears
DE10155372A1 (en) 2001-11-10 2003-05-22 Bosch Gmbh Robert System and method for specifying an engine torque and a transmission ratio in a vehicle with a continuously variable transmission

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