A control device for a work machine hydraulic pump used on a work vehicle according to the present invention has an object to rapidly accelerate the engine to start the vehicle quickly and to rapidly produce a large tractive force when an operator starts depressing the accelerator pedal while operating the work machine operating lever from the neutral position. An electromagnetic sensor architecture is suitable for all applications where contactless or hybrid cards are of advantage: high volume paying and toll applications, etc. The voice extension module receives user interface information, such as, a hypertext markup language document, and voice-enables the document so that a user may interact with any user interface elements using voice commands. In the axial direction, the supporting element has snap hooks which connect the first end disk undetachably to the second end disk.