Punch Powertrain N.v.

Rekha Kandiyil Raveendran

Timotheus Franciscus Adrianus Van Els

Electrically controllable hydraulic system for a vehicle transmission and method for controlling the same An electrically controllable hydraulic system () for a vehicle transmission comprises a pressure pump system () and a subsystem (A) comprising a transmission element () and an electrically controlled hydraulic pressure controlling module (B) including a hydraulic valve element () for controlling a hydraulic pressure for actuating the transmission element () and an electromagnetically controllable operating element () for operating the hydraulic valve element (). The subsystem (A) and the pressure controlling module (B) have a first and a second cut-off frequency (f, f) with f&#x3e;f. The hydraulic system includes a driver circuit () for driving the pressure controlling module (B) that comprises a full bridge circuit and a control circuit () for simultaneously controlling both switching elements of the driver circuit with a duty cycle according to an input value of the input signal (lset) dithered with a frequency (f) in the range (f, f).

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Holsbeek, Belgium

Rekha Kandiyil Raveendran