WORK VEHICLE AND METHOD FOR CONTROLLING WORK VEHICLE

To reduce a shift shock when switching from 2-motor travel to 1-motor travel in a work vehicle including a hydrostatic transmission.SOLUTION: When a vehicle speed increases and reaches a prescribed switching threshold value, a controller decreases the capacity of a first travel motor and controls a...

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Bibliographische Detailangaben
1. Verfasser:	OASA TAKAO
Format:	Patent
Sprache:	eng ; jpn
Schlagworte:	BLASTING DREDGING ENGINEERING ELEMENTS AND UNITS FIXED CONSTRUCTIONS FOUNDATIONS GEARING GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVEFUNCTIONING OF MACHINES OR INSTALLATIONS HEATING HYDRAULIC ENGINEERING LIGHTING MECHANICAL ENGINEERING SOIL SHIFTING THERMAL INSULATION IN GENERAL WEAPONS
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Beschreibung
Zusammenfassung:	To reduce a shift shock when switching from 2-motor travel to 1-motor travel in a work vehicle including a hydrostatic transmission.SOLUTION: When a vehicle speed increases and reaches a prescribed switching threshold value, a controller decreases the capacity of a first travel motor and controls a flow control device so as to offset an excess portion of the flow rate in a hydraulic circuit corresponding to the decrease in the capacity of the first travel motor. After the vehicle speed reaches the switching threshold value, the controller performs switching control for switching a clutch from an engaged state to a disengaged state.SELECTED DRAWING: Figure 11 【課題】静油圧式トランスミッションを備える作業車両において、２モータ走行から１モータ走行に切り換えられるときの変速ショックを低減する。【解決手段】コントローラは、車速が増大して所定の切換閾値に達したときに、第１走行モータの容量を低減すると共に、第１走行モータの容量の減少に応じた油圧回路での流量の余剰分を相殺するように、流量制御装置を制御する。コントローラは、車速が切換閾値に達したのちに、クラッチを係合状態から開放状態に切り換える切換制御を実行する。【選択図】図１１