Method for operating a grain cleaning system in a combine harvester

摘要

The present invention relates to a method for improving the operation of a grain cleaning system (1) in a combine harvester characterized in that the method comprises the step of adjusting the position of the upper sieve (5) in the grain cleaning system (1) upon registering a deviance from a threshold value for crop material load on the upper sieve (5) such that the material return flow is adjusted. The present invention further relates to a sieve overload control algorithm capable of activating an optimal sieve control action upon registration of a deviance from a threshold value for crop material load on the upper sieve (5) of a grain cleaning system (1). <IMAGE>