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1. (WO2001002755) HYDRAULIC CONTROL FOR AN AUTOMATIC GEAR BOX

Pub. No.:    WO/2001/002755    International Application No.:    PCT/EP2000/005838
Publication Date: Fri Jan 12 00:59:59 CET 2001 International Filing Date: Sun Jun 25 01:59:59 CEST 2000
IPC: F16H 61/00
Applicants: ZF FRIEDRICHSHAFEN AG
FESSLER, Bernd
BENTELE, Helmut
Inventors: FESSLER, Bernd
BENTELE, Helmut
Title: HYDRAULIC CONTROL FOR AN AUTOMATIC GEAR BOX
Abstract:
The automatic gear box for motor vehicles comprises a gear box control, whereby a proportional pressure control valve (4) is inserted into said gear box control, and a hydraulic pump (1) which is used to control, cool and lubricate, whereby the capacity of said pump is a function of the engine speed. The gear box is provided with an additional hydraulic pump which can be coupled to the hydraulic circuit of the gear box whenever required.