Kubota Corporation

Bridgestone Corporation

Kazuma Ishihara

Shigeki Hayashi

Kenichi Iwami

Takashi Kobayashi

Akihiro Matsuzaki

Toshimitsu Yazaki

Atsushi Hayashi

Tsuyoshi Gono

Motonari Inaoka

Yuji Hirase

Atsushi Jinnai

Susumu Takeoka

Yutaka Abiko

Masahiro Sakaguchi

Setsuo Fujino

A work vehicle includes a vehicle body provided with a travel device; a prime mover provided in the vehicle body; a transmission device capable of speed-changing a driving force from the prime mover and transmitting the driving force to the travel device; a transmission case housing the transmission device and being filled with lubricating oil; and a control device capable of switching between a warm-up operation mode in which a gear of the transmission device is rotated in a state in which transmission of power from the transmission device to the travel device is blocked and a travel operation mode in which the gear is rotated in a state in which the power is transmitted from the transmission device to the travel device.

Work vehicle

A suspension system for a traveling vehicle body is disclosed. The system includes a suspension reference position varying mechanism () for varying a reference position of a suspension stroke of the suspension mechanism (), and a controller () configured to calculate an intermediate value from a maximal value corresponding to the maximal position of the suspension stroke and a minimal value corresponding to the minimal position of the suspension stroke, and to control the suspension reference position varying mechanism such that, when the calculated intermediate values deviates from a set target range, the intermediate value is displaced toward the target range. The controller () increases a control execution frequency for the suspension reference position varying mechanism () when the traveling speed of the vehicle body is low, and reduces the control execution frequency for the suspension reference position varying mechanism () when the traveling speed of the vehicle body is high.

Suspension system

Growing community of inventors

Sakai, Japan

Kazuma Ishihara