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Hydraulic emergency control device for changing hydraulic oil pressure in relation to gear ratio in hydraulic conical pulley axial adjustment device of continuously variable transmission
Hydraulic emergency control device for changing hydraulic oil pressure in relation to gear ratio in hydraulic conical pulley axial adjustment device of continuously variable transmission
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机译:用于无级变速器的液压圆锥形皮带轮轴向调节装置中的液压传动装置,用于根据传动比改变液压油压力
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PCT No. PCT/EP96/01947 Sec. 371 Date Nov. 4, 1997 Sec. 102(e) Date Nov. 4, 1997 PCT Filed May 9, 1996 PCT Pub. No. WO96/37717 PCT Pub. Date Nov. 28, 1996A hydraulic emergency control system for a continuous looped gear type continuously variable transmission (10) includes first and second hydraulic beveled conical pulley axial actuators controlling a gear ratio. A pump supplies a first piston chamber (13) of said first axial actuator via a sensor valve (20), wherein the sensor valve (20) is controlled by a flow control valve (73) connected downstream of the pump (80). The pump (80) supplies a second piston chamber (17) of the second axial actuator, with a pressure relief valve (40) limiting fluid pressure in said second piston chamber. Fluid in the second piston chamber (17) is controlled as a function of the fluid pressure in the first piston chamber (13) via a control line (52, 113).
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