Ponsse Oyj

Jukka Karppinen

Pentti Hukkanen

Jukka Tossavainen

Vesa Koirikivi

Ossi Pohjoisaho

Mika Keränen

Petri Nousiainen

Risto Vidgren

Jan Kauhanen

Anssi Sarhaluoma

Risto Vidgrén

In the solution put forth, a pressure level of a pump in a hydraulic transmission system of a hydraulic working machine, or power that is feedable to an electric drive motor of an electric working machine is monitored, and/or the rotation speed at the output of the drive motor of the working machine and the rotation of moving means of the working machine are monitored. The pressure level of the hydraulic power transmission pump, or the power feedable to an electric drive motor, is compared with a lower threshold value to detect a fault situation, and/or the rotation speed at the output of the drive motor is compared with the rotation of the moving means also to detect a fault situation. In case a fault situation is detected, the braking system of the working machine is controlled to apply the brakes.

Mobile working machine, control system and method for controlling mobile working machine

The invention relates to an arrangement in a forestry machine (), in which arrangement there is &#x2014;a chassis (), &#x2014;a single-axle set of wheels () pivoted to the chassis (), and &#x2014;at least one auxiliary wheel () fitted the outside the set of wheels (), in order to increase the load-bearing capacity of the rear part () of the chassis (). &#x2014;The arrangement further includes &#x2014;at least one support arm () arranged to carry the said auxiliary wheel () at its first end () and pivoted at its second end () to the said chassis () with the aid of a transverse shaft (), &#x2014;a support surface () attached to the chassis () and a counter surface () attached to the said support arm (), for limiting the transverse movement of the support arm (). &#x2014;The invention also relates to a corresponding forestry machine.

Arrangement in a forestry machine and a forestry machine equipped with a corresponding arrangement

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Hernejarvi, Finland

Jukka Karppinen