Endless belt power transmission systems or components – Pulley with belt-receiving groove formed by drive faces on... – Load responsive
Reexamination Certificate
2005-01-11
2005-01-11
Charles, Marcus (Department: 3682)
Endless belt power transmission systems or components
Pulley with belt-receiving groove formed by drive faces on...
Load responsive
C474S028000
Reexamination Certificate
active
06840875
ABSTRACT:
A system (10), in particular an electrohydraulic system (10), for adjusting the contract pressures of a continuously variable gear, in particular a double-cone pulley belt-contact gear, which has a device for changing the gear ratio of the gear having at least one primary pressure chamber and one secondary pressure chamber is proposed. An electrically triggerable primary pressure valve (Vprim) for adjusting the pressure in the primary pressure chamber and an electrically triggerable secondary pressure valve (Vsec) for adjusting the pressure in the secondary pressure chamber are provided. The pressure (pprim) of the primary pressure chamber and the pressure (psec) of the secondary pressure chamber can be carried to the secondary pressure valve (Vsec). The object is to enable a more-accurate adjustment of the pressure (pprim) in the primary pressure chamber. To that end, the trigger current (Isec) of the secondary valve (Vsec) is set to a value which corresponds to a predetermined pressure (psec,soll) in the primary and the secondary pressure chamber. Moreover, the pressure (psec,soll) in the secondary pressure chamber is regulated, via the trigger current (Iprim) of the primary valve (Vprim), so that the pressure (pprim) in the primary pressure chamber is established indirectly.
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Charles Marcus
Robert & Bosch GmbH
Striker Michael J.
LandOfFree
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