METHOD OF LOADING TIMBER LOGS ON A LOG-HANDLING VEHICLE AND A LOG-HANDLING VEHICLE

Patentradars sammanfattning

Komatsu Forest AB's invention addresses hydraulic energy waste in forwarders where operators continuously command grapple closure during crane manipulation, forcing the pump to sustain high pressure even when the grapple is already closed. A microprocessor-based controller monitors grapple actuator pressure against an upper threshold (P-thres 2) and a lower threshold (P-thres 1), automatically toggling the grapple valve shut when pressure peaks and reopening it when pressure drops, creating an adaptive load-holding cycle. Critically, while the grapple actuator is in stopped movement, the pump system supplies the crane rotator and grapple rotator at hydraulic pressures below P-thres 2, eliminating throttling losses that would otherwise arise from sharing a high-pressure source with lower-pressure consumers. The invention is particularly beneficial for hybrid-electric and battery-powered forestry machines where energy efficiency is paramount.

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