Title: Adjusting apparatus of electric hydraulic pressure lifting mechanism
Application Number: 87106222 Application Date: 1987.09.09
Publication Number: 1019310 Publication Date: 1988.07.06
Approval Pub. Date: Granted Pub. Date:
International Classifi-cation: A01B63/111
Applicant(s) Name: VEB Kombinat Fortschritt Landmaschinen Address:
Inventor(s) Name: Erdmann Puls
Attorney & Agent: WANG DONGLING
Abstract:
    The purpose of the invention is to develop a lifting-unit regulating device which can be used in a flexible way and which works with low energy, whilst ensuring a high regulating quality, whilst the object is, when the dead-zone limits are exceeded, to achieve a jolt-free response with a freely selectable responsiveness of the lifting cylinder. According to the invention, as a result of a shift by the amount of a selectable first preset value - sensitivity 1 - in the y-direction, rectification and multiplicative linkage to a selectable second preset value - sensitivity 2 - of the characteristic of the amplified absolute value of the control deviation, a signal having a continuous characteristic curve is formed, this signal activating the magnets for a proportional valve via a pulse modulator linkage with the output signals from a window discriminator, the input signal of which is the control deviation.
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