Punch Powertrain N.v.

Ntz Nederland B.v.

Wilhelmus Petrus Maria Schaerlaeckens

Jacobus Hubertus Maria Van Rooij

Kirk J Ciak

Control system for a continuously variable transmission with a first and a second pair of conical sheaves each with adjustable running radius, in which of each pair at least one sheave () is coupled to a first and a second hydraulic actuator () respectively which sets the axial sheave position in dependence of the amount of hydraulic medium supplied thereto, in which the actuators are connected with means to supply and discharge thereto/therefrom respectively, hydraulic medium, and one actuator is connected to a source of hydraulic pressure medium, and in which furthermore the first and second actuator respectively is connected with a first and second control chamber () respectively, filled with hydraulic medium and having a variable control volume, in such a way that an increase of the first control volume is coupled to a decrease of the second control volume, and vice versa.

Control system for a continuously variable transmission

One advantageous embodiment of the invention is a filter device () for filtering a fluid and providing three or more substantially continuous directions of flow therethrough. The filter device () includes a housing () having an entry port () and an exit port (). The housing () has a filter medium () disposed therein for filtering the fluid that flows along a filtration-flow direction () from the entry port () to the exit port (). The filter medium () has a bi-directional valve () coupled thereto for selectively directing the fluid along a bypass-flow direction () and a reverse-flow direction () that is generally opposite to said bypass-flow direction (). The bypass-flow direction () extends from the entry port () to the exit port () in bypass of the filter medium (). Also, the reverse-flow direction () extends from the exit port () to the entry port ().

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Bavel, Netherlands

Wilhelmus Petrus Maria Schaerlaeckens