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Method and system for regulating the operating depth of towed agricultural machinery, for example tractor-borne plows

  • US 4,385,353 A
  • Filed: 07/07/1980
  • Issued: 05/24/1983
  • Est. Priority Date: 07/07/1979
  • Status: Expired due to Term
First Claim
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1. A method for regulating the operating depth of towed agricultural machinery such as tractor-borne plows with a regulating system utilizing the plow-generated pulling force as an auxiliary control variable, comprising:

  • determining the rate of variation of the pulling force;

    providing limiting values for the rate of variation of the pulling force;

    comparing the determined value of the rate of pulling force variation with the limit values; and

    controlling the vertical position of the plow in accordance with the comparison between the determined value and the limiting values.

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