Yanmar Co., Ltd.

Yanmar Power Technology Co., Inc.

Hidehiro Yuki

Hitoshi Nomura

Keiichi Hayashi

Keisuke Iwamura

Shoichi Nakamura

A working vehicle with an HST in which over-rotation of a hydraulic pump in the HST or the pump input shaft thereof is prevented when a main clutch is disconnected during a run. When a main clutch connection/disconnection detection means detects the disconnection state of the main clutch during a run, a control means judges whether a vehicle speed detected by a vehicle speed detection means is at least a set speed or not, and if the vehicle speed is at least the set speed, the movable swash plate of the hydraulic pump in an HST is controlled to sustain it at the current inclination angle.

Growing community of inventors

Osaka, Japan

Hidehiro Yuki