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公开(公告)号：EP3978775A1
公开(公告)日：2022-04-06
申请号：EP20199726.9
申请日：2020-10-02
申请人： Robert Bosch GmbH
IPC分类号： F16D48/06
摘要： The present invention relates to a method for calibrating a coupling system (12) of a summation mechanical transmission, which is configured to couple a first drive shaft (14) coupled to a first hydraulic motor (4) and a second drive shaft (16) coupled with a second hydraulic motor (8), the coupling system (12) comprising an hydraulic coupling (26) with two releasable coupling sections (28, 30), wherein a first coupling section (28) is connected to the first drive shaft (14) and a second coupling section (30) is connected to the second drive shaft (16), the coupling system (12) further comprising an hydraulic cylinder (34) which is connected to one of the first and the second coupling sections (28, 30) and is configured to engage and to disengage said first coupling section (28) with said second coupling section (30) based on a pressure inside said hydraulic cylinder (34), wherein the pressure inside said hydraulic cylinder (34) can be regulated by means of a pressure regulating device (44),
wherein said pressure regulating device (44) comprises activating means (78), which are configured to regulate the pressure inside said hydraulic cylinder (34) based on a current (i C ) provided to said activating means (78);
wherein the method comprises the following step:
estimating a function over the temperature for a current (i_kp) provided to said activating means (78), which is requested for reaching the kiss point.-
公开(公告)号：EP3978773A1
公开(公告)日：2022-04-06
申请号：EP20199724.4
申请日：2020-10-02
申请人： Robert Bosch GmbH
IPC分类号： F16D48/06
摘要： The present invention relates to a method for calibrating a coupling system (12) of a mechanical transmission which is configured to couple a first drive shaft (14) and a second drive shaft (16), the coupling system (12) comprising an hydraulic coupling (26) with two releasable coupling sections (28, 30), wherein a first coupling section (28) is connected to the first drive shaft (14) and a second coupling section (30) is connected to the second drive shaft (16), the coupling system (12) further comprising an hydraulic cylinder (34) which is connected to one of the first and the second coupling sections (28, 30) and is configured to engage and to disengage said first coupling section (28) with said second coupling section (30) based on a pressure inside said hydraulic cylinder (34), wherein the pressure inside said hydraulic cylinder (34) can be regulated by means of a pressure regulating device (44), the method being characterized by comprising the following steps:
a. Coupling and decoupling the first drive shaft (14) with the second drive shaft (16) for a predetermined number of times, wherein for each of said number of times the temperature of a pressure medium, which is the pressure medium introduced into said hydraulic cylinder (34) during the coupling or during the uncoupling process by means of said pressure regulating device (44), is substantially the same;
b. During the coupling process measuring a first time interval (t 1 ), which is the time requested for reaching a predetermined pressure value inside said hydraulic cylinder (34), wherein said predetermined pressure is a pressure at which a kiss point between said first coupling section (28) and said second coupling section (30) has still not have been reached;
c. Averaging the value of said first time interval (t 1 ) obtained in each coupling process;
wherein said steps a. to c. are repeated for at least two different temperatures (TL, T H ) of the pressure medium, which is introduced into said hydraulic cylinder (34) during the coupling or during the uncoupling process;
wherein based on the averaged values of said first time interval obtained for said at least two different temperatures an interpolating function is estimated by interpolating the values of said first time interval (t 1 ) obtained for said at least two temperatures (T L , T H ), wherein said interpolating function is a function representing said first time interval (t 1 ) over the temperature.-
公开(公告)号：EP4148302A1
公开(公告)日：2023-03-15
申请号：EP22195019.9
申请日：2022-09-12
申请人： Robert Bosch GmbH
IPC分类号： F16H61/452 , B60K17/356 , F16H61/456
摘要： Die vorliegende Erfindung betrifft ein Verfahren zur Steuerung eines Fahrantriebes (1) einer mobilen Arbeitsmaschine, wobei der Fahrantrieb mit einer Hydropumpe (2) zur Druckmittelversorgung mindestens vier mit einem Abtrieb (80) koppelbarer Hydromotoren (78) versehen ist, wobei in dem Fahrantrieb die mindestens vier Hydromotoren (78) wahlweise in einer seriellen Konfiguration, in einer parallelen Konfiguration, in einer seriellen-parallelen Konfiguration oder in einer Kombination von diesen Konfigurationen angeordnet werden können, wobei das Verfahren den folgenden Schritt umfasst:
a. Automatisch Umschalten mindestens teilweise von der parallelen Konfiguration in die serielle-parallele Konfiguration, wenn mindestens eine erfasste Information einen Wechsel von der parallelen Konfiguration in die serielle-parallele Konfiguration mindestens teilweise erfordert.-
公开(公告)号：EP3978774A1
公开(公告)日：2022-04-06
申请号：EP20199725.1
申请日：2020-10-02
申请人： Robert Bosch GmbH
IPC分类号： F16D48/06
摘要： The present invention relates to a method for controlling a coupling system (12) of a summation mechanical transmission which is configured to couple a first drive shaft (14) and a second drive shaft (16) during coupling, the coupling system (12) comprising an hydraulic coupling (26) with two releasable coupling sections (28, 30), wherein a first coupling section (28) is connected to the first drive shaft (14) and a second coupling section (30) is connected to the second drive shaft (16), the coupling system (12) further comprising an hydraulic cylinder (34) which is connected to one of the first and the second coupling sections (28, 30) and is configured to engage and to disengage said first coupling section (28) with said second coupling section (30) based on a pressure inside said hydraulic cylinder (34), wherein the pressure inside said hydraulic cylinder (34) can be regulated by means of a pressure regulating device (44),
wherein said pressure regulating device (44) comprises activating means (78), which are configured to regulate the pressure inside said hydraulic cylinder (34) based on a current (ic) provided to said activating means (78);
the method comprising the following steps:
a. Proving said activating means (78) with a current (iC) for a first time interval (t1) such that said first coupling section (28) and said second coupling section (30) are approached to each other but the kiss point has still not be reached;
b. After said first time interval (t 1 ) providing said activating means (78) for a modulation time interval (t 2 , t 3 ) with a current (i C ) such that the approaching of said first coupling section (28) and said second coupling section (3) is slowed down with respect to the approaching during said first time interval (t1), wherein during said modulation time interval (t 2 , t 3 ) the kiss point is reached;
wherein said modulation time interval (t 2 , t 3 ) is divided into a second time interval (t 2 ) and a third time interval (t 3 ), wherein both in said second time interval (t 2 ) and said third time interval (t 3 ) the current (i C ) provided to said activating means (78) is gradually increased or decreased with a predetermined slope, wherein the slope of the current (ic) during said second time interval (t 2 ) is different with respect to the slope of the current (ic) during said third time interval (t 3 ).
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