Patent ID: 7756622
Filing Date: 2010-07-13
Classification: E02F

Abstract:
1. A method of attenuating movement in a self-propelled, unsprung construction machine, particularly a wheeled loader, with a cab, a shovel driven by a hydraulic cylinder, a hydraulic source, a controlled valve for supplying the hydraulic cylinder with hydraulic fluid, a control unit with control software and at least one sensor in the form of an acceleration sensor configured to detect oscillations of the construction machine imposed by both a carriage way and the shovel, whereby the method includes the following stages: a) detection of the acceleration signal by the acceleration sensor while the construction machine is moving; b) selection of a damping mode from several adaptable damping functions stored in the control unit to minimize cab acceleration and/or minimize acceleration of the shovel; c) processing of the acceleration signal as an input variable by the control software of the control unit and determination of a control current for the valve as an output variable for attenuating movement as a function of the damping mode selected and a shovel load signal detected from a second sensor; and d) supplying the hydraulic cylinder with hydraulic fluid through the valve as a function of the control current.