The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jun. 29, 2021
Filed:
Aug. 17, 2018
Punch Powertrain N.v., Sint-Truiden, BE;
Rekha Kandiyil Raveendran, Holsbeek, BE;
Timotheus Franciscus Adrianus Van Els, Echt-Susteren, NL;
Punch Powertrain N.V., Sint-Truiden, BE;
Abstract
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>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).