To provide a front-rear wheel independent drive type vehicle which includes a front wheel drive unit and a rear wheel drive unit separately and improves NV performance while securing drivability.SOLUTION: Since the transmission ratio γr of a rear side transmission mechanism 28 is greater than the transmission ratio γf of a front side transmission mechanism 24, resonance is suppressed with a difference in the rotational speeds in respective parts, NV performance is improved and drivability can be properly secured. Although the drivability is requested generally in the time of acceleration like the vehicle start, loads applied to rear wheels 16L, 16R become greater in the time of acceleration, loads applied to front wheels 12L, 12R become smaller and a slip easily occurs, the drive torque on the rear wheels 16L, 16R becomes relatively greater with respect to the drive torque on the front wheels 12L, 12R due to a difference in the transmission ratios γr, γf, and therefore the drive torque can be properly transmitted to the front wheels 12L, 12R and the rear wheels 16L, 16R while suppressing the slip, and the power performance can be sufficiently exploited.SELECTED DRAWING: Figure 1

    【課題】前輪駆動ユニットと後輪駆動ユニットとを別々に備えている前後輪独立駆動型車両に関し、ドライバビリティを確保しつつNV性能を向上させる。【解決手段】後側変速機構28の変速比γrが前側変速機構24の変速比γfよりも大きいため、各部の回転速度の相違で共振が抑制されてNV性能が向上するとともに、ドライバビリティを適切に確保することができる。一般にドライバビリティが要求されるのは車両発進時等の加速時であるが、加速時には後輪16L、16Rに掛かる荷重が大きくなる一方、前輪12L、12Rの荷重が小さくなってスリップが発生し易くなるのに対し、変速比γr、γfの相違で後輪16L、16R側の駆動トルクが前輪12L、12R側の駆動トルクに対して相対的に大きくなるため、スリップを抑制しつつ前輪12L、12R、および後輪16L、16Rに駆動トルクを適切に伝達して動力性能を十分に引き出すことができる。【選択図】図1


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    Title :

    FRONT-REAR WHEEL INDEPENDENT DRIVE TYPE VEHICLE


    Additional title:

    前後輪独立駆動型車両


    Contributors:

    Publication date :

    2023-07-25


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    Japanese


    Classification :

    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 / F16H Getriebe , GEARING



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