Control arrangement for vehicles having a hydrostatic...

B - Operations – Transporting – 60 – K

Patent

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Details

B60K 7/00 (2006.01) B60K 17/356 (2006.01) B60K 23/08 (2006.01) F16H 61/42 (2010.01)

Patent

CA 2726574

The invention relates to a control arrangement for vehicles having a hydrostatic auxiliary drive for one or more axles, in particular for motor graders, having a drive engine (4), having driven rear wheels (6) which are coupled to the drive engine (4), having further wheels (7) which can be activated by means of associated hydraulic motors (8, 9) and which can be operated by a hydraulic pump (12) which is coupled to the drive engine (4) and which has an adjustable feed volume, wherein each wheel (7) is connected to a hydraulic motor (8 or 9) without a clutch. The hydraulic pump (12) and the hydraulic motors (8, 9) can be activated electrically and can be adjusted in a continuously variable fashion and the hydraulic pump (12) is connected directly, without valves, to the hydraulic motors (8, 9) in parallel by means of hydraulic lines (10, 11). The control device (13) controls the respective displacement volume of the hydraulic motors (8, 9) only as a function of the rotational speed signals of the sensors.

L'invention concerne un dispositif de commande pour véhicules à entraînement hydrostatique auxiliaire pour un ou plusieurs essieux, en particulier pour niveleuses, comportant un moteur d'entraînement (4), des roues arrière entraînées (6) qui sont accouplées au moteur d'entraînement (4), d'autres roues (7) pouvant être commutées par des moteurs hydrauliques (8, 9) associés et pouvant être mises en service par une pompe hydraulique (12) à volume variable accouplée au moteur d'entraînement (4), chaque roue (7) étant reliée à un moteur hydraulique (8 ou 9) sans accouplement. La pompe hydraulique (12) et les moteurs hydrauliques (8, 9) peuvent être commandés électriquement et réglés en continu et la pompe hydraulique (12) est reliée aux moteurs hydrauliques (8, 9) directement, en parallèle et sans vanne, par des conduites hydrauliques (10, 11). Le dispositif de commande (13) ne commande le volume de refoulement des moteurs hydrauliques (8, 9) qu'en fonction des signaux de vitesse de rotation des capteurs.

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