| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To improve a variable control performance of a distribution ratio of a power transmitted to front wheels and rear wheels without significantly changing a hydraulic system. <P>SOLUTION: A gear shift output shaft 32 and a front wheel output shaft 34 are connected with each other via a front wheel clutch 36, and power is transmitted to front wheels by the front wheel output shaft 34. Meanwhile, the gear shift output shaft 32 and a rear wheel output shaft 35 are connected with each other via a rear clutch 37 opposed to the front wheel clutch 36, and power is transmitted to rear wheels by the rear wheel output shaft 35. A hydraulic actuator 60 having a cylinder 61 and a piston 62 slidably assembled with each other is provided between the front wheel clutch 36 and the rear wheel clutch 37. When working oil is supplied to a hydraulic chamber 63, engagement of the rear wheel clutch 37 by a spring member 56 is canceled, and the front clutch 36 is engaged. <P>COPYRIGHT: (C)2009,JPO&INPIT</p> |
