HYDRAULIC CONTROL APPARATUS OF AN AUTOMATED MULTI-STEP CHANGE-SPEED GEARBOX

申请公布号：EP2094996(B1)

申请号：EP20070821183

申请日期：2007.10.11

申请公布日期：2012.02.01

申请人：

ZF FRIEDRICHSHAFEN AG

发明人：FRITZER, ANTON

分类号：F16H61/28;F16H61/02;F16H61/688

主分类号：F16H61/28

摘要：<p>A hydraulic control device with a plurality of gear-actuating cylinders for engaging and disengaging the gears of an automated multi-step transmission, with pressure-controlled gear-regulating valves for controlling the pressure in one pressure chamber of the cylinders, and with a multiplex arrangement of singly switchable pressure-controlled selector valves for assigning the regulating valves to one pressure chamber of the actuating cylinders. The device includes a common pilot valve, designed as a regulating valve, for actuating one of the regulating valves and at least one of the selector valves. The pilot valve features a first control pressure range that contains the switching pressure of the selector valve and a second control pressure range that contains the regulating range of the gear-regulating valve.</p>

Method of fracturing using mannanohydrolase enzyme breaker

Articulated wall plate corner detail for suspended ceilings

New bis(2, 2'-bithienyl)methane derivative and method of producing thereof, molecularly imprinted polymer film, method of producing therof and its use

Bottle challenge base board

Molecule

Fat ball protector for small birds

Drive apparatus for electricity generating apparatus

Mobile-device security

Multiple tape width easy and safe cutter

Ad hoc detector for emergencies

Personality analysis software matrix

Polymorph purity, monitoring and associated compositions

Composition and method

Single axis telescoping handle

Nail clipper

Flexible plastic packaging box

Event mining in social networks

Snake-like segmented robotic vacuum cleaner

Method and system for automatic control of the flight formation of unmanned aerial vehicles

An easily assembled and secure roofing/cladding system