초록 ▼

A hitch control system includes a draft force sensor, a hitch position sensor, an operator command lever, an upper hitch position limit setter, a mixer setter, a drop rate setter and a control unit which generates control signals as a function thereof. The control system includes a first (load) cont

A hitch control system includes a draft force sensor, a hitch position sensor, an operator command lever, an upper hitch position limit setter, a mixer setter, a drop rate setter and a control unit which generates control signals as a function thereof. The control system includes a first (load) control mode wherein the hitch is controlled as a linear function primarily of sensed draft force and a second control mode wherein the hitch is controlled purely as a non-linear function of sensed hitch position. In the load control mode, a reference position value is used as a set point representing only the lower range of positions of the hitch. Draft force sensitivity and system gain values are derived from the mix setter so that increasing the sensitivity also increases the system gain. The sensitivity value is limited within a predetermined range.

대표청구항 ▼

In a vehicle having a hitch for attaching a ground-penetrating implement thereto and actuating means for raising and lowering the hitch through a range of positions in response to control signals applied to an input thereof, a control system comprising: a sensor for generating a feedback signal (FDB

In a vehicle having a hitch for attaching a ground-penetrating implement thereto and actuating means for raising and lowering the hitch through a range of positions in response to control signals applied to an input thereof, a control system comprising: a sensor for generating a feedback signal (FDBK) representing a sensed position of the hitch; means for generating a reference signal (R) representing a reference position of the hitch; means for generating an error signal representing a non-linear function of a difference between the feedback and reference signals, said function being such that a gain of the control system is modified for a value of said difference which corresponds to a maximum value of the control signal applied to the input of the actuating means so as to reduce jerkiness of hitch movement when said difference changes from said corresponding value; and means for converting the error signal to the control signal.