To improve working efficiency by raising a temperature of radiator fluid of a work vehicle up to a proper temperature quickly to enhance engine output.SOLUTION: The engine section of a work vehicle, in which a single fan (40) is arranged between an engine (20) and a radiator (30), is constituted of: a first transmission passage (W1) through which driving force of the engine (20) is transmitted to the fan (40) to normally rotationally drive the fan; a second transmission passage (W2) through which driving force of the engine (20) is transmitted to the fan (40) to reversely drive the fan; and a power switching mechanism (60) that switches a state into a state where the driving force is transmitted through the first transmission passage (W1) to the fan (40) and into a state where the driving force is transmitted through the second transmission passage (W2) to the fan (40), which can produce a fan stoppage state where driving force is not transmitted to the fan (40) through either of the first transmission passage (W1) and the second transmission passage (W2), by controlling the power switching mechanism (60).SELECTED DRAWING: Figure 2
【課題】作業車両のラジエータ水温を早期に適正温度まで上昇させてエンジン出力を高め、作業能率を向上させる。【解決手段】 エンジン(20)とラジエータ(30)の間に単一のファン(40)を配置し、エンジン(20)の駆動力をファン(40)に伝動して正転駆動する第1の伝動経路(W1)と、エンジン(20)の駆動力をファン(40)に伝動して逆転駆動する第2の伝動経路(W2)と、第1の伝動経路(W1)からファン(40)へ駆動力を伝動する状態と前記第2の伝動経路(W2)からファン(40)へ駆動力を伝動する状態とに切り替える動力切替機構(60)と、動力切替機構(60)を制御して第1の伝度経路(W1)と第2の伝動経路(W2)のいずれからもファン(40)へ駆動力が伝動されないファン停止状態を現出可能な構成とする。【選択図】図2
ENGINE SECTION OF WORK VEHICLE
作業車両の原動部
2018-12-27
Patent
Electronic Resource
Japanese
IPC: | B60K Anordnung oder Einbau von Antriebseinheiten oder von Kraft- bzw. Drehmomentübertragungen in Fahrzeugen , ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES / A01D Ernten , HARVESTING / F01P Kühlung von Kraft- und Arbeitsmaschinen oder Kraftmaschinen allgemein , COOLING OF MACHINES OR ENGINES IN GENERAL / F16H Getriebe , GEARING |