| US 7,571,604 B2 | ||
| Method for shaking a work implement | ||
| Bo Vigholm, Stora Sundby (Sweden); Nils-Erik Bånkestad, Eskilstuna (Sweden); and Rauno Räisanen, Eskilstuna (Sweden) | ||
| Assigned to Volvo Contruction Equipment AB, Eskilstuna (Sweden) | ||
| Filed on Oct. 19, 2006, as Appl. No. 11/550,988. | ||
| Application 11/550988 is a continuation of application No. PCT/SE2005/000466, filed on Mar. 29, 2005. | ||
| Claims priority of application No. 0401029 (SE), filed on Apr. 19, 2004. | ||
| Prior Publication US 2007/0039457 A1, Feb. 22, 2007 | ||
| Int. Cl. E02F 9/22 (2006.01); G05B 15/00 (2006.01) | ||
| U.S. Cl. 60—445 [700/75] | 19 Claims |
| 1. A working machine comprising:
a source of pressurized fluid (1);
a circuit of pressurized fluid (2) for driving the work implement;
an electronically controlled hydraulic valve (5) arranged in the circuit of pressurized fluid (2) for controlling the function of the work implement; and
a computer-based control unit (4), with machine-executable program statements thereon, that controls the hydraulic valve (5) based upon a signal from a control member (3) for transmitting a control command to the control unit (4), wherein the control unit (4) alternately controls the hydraulic valve (5), using a filter function to do so, in accordance with a smooth mode function or an abrupt mode function and wherein the
filter function operates differently in the smooth mode and in the abrupt mode so that the opening time for opening the hydraulic
valve (5) to a predetermined opening degree is changed when switching from one operating mode function to the other operating mode
function, the ramp time for the hydraulic valve (5) to open to said predetermined degree being shorter in the abrupt mode than in the smooth mode.
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