To provide an auxiliary driving device of a four-wheel drive car which can reduce vibration and sound at the time of engagement of a dog clutch while transmitting a driving force of an electric motor to an auxiliary driving wheel via the dog clutch.SOLUTION: An auxiliary driving device 2 comprises: a drive part 20 having an electric motor 3; a dog clutch 5 having a first engagement component 51 and a second engagement component 52; an actuator 6 which moves the second engagement component 52; and a control part 10 which controls the electric motor 3 and the actuator 6. The actuator 6 moves the second engagement component 52 between a separation position at which the second engagement component is not engaged with the first engagement component 51, a contact position at which a first engagement tooth 514 and a second engagement tooth 524 contact each other, and an engagement position at which these are engaged with each other. The control part 10 so makes electric current, which is supplied to the electric motor 3 when the second engagement component 52 is positioned between the contact position and the engagement position as to be smaller than electric current required for maintaining a rotational speed of the electric motor 3.SELECTED DRAWING: Figure 6
【課題】噛み合いクラッチを介して電動モータの駆動力を補助駆動輪に伝達しながらも、噛み合い時における振動や音を低減することが可能な四輪駆動車の補助駆動装置を提供する。【解決手段】補助駆動装置2は、電動モータ3を有する駆動部20と、第1の噛み合い部材51及び第2の噛み合い部材52を有する噛み合いクラッチ5と、第2の噛み合い部材52を移動させるアクチュエータ6と、電動モータ3及びアクチュエータ6を制御する制御部10とを備える。アクチュエータ6は、第2の噛み合い部材52を、第1の噛み合い部材51と噛み合わない離間位置と、第1の噛み合い歯514と第2の噛み合い歯524とが当接し得る当接位置と、これらが噛み合う噛合位置との間で移動させる。制御部10は、第2の噛み合い部材52が当接位置から噛合位置の間にあるときに電動モータ3に供給する電流を、電動モータ3の回転速度を維持するために必要な電流よりも小さくする。【選択図】図6
AUXILIARY DRIVING DEVICE
補助駆動装置
2019-01-17
Patent
Electronic Resource
Japanese
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