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    • 6. 发明授权
    • Driving force control method in 4-wheel drive vehicle
    • 四轮驱动车辆的驱动力控制方法
    • US5894904A
    • 1999-04-20
    • US785245
    • 1997-01-17
    • Takayuki YakouKoji KurodaTetsuro HamadaKazunori KobayashiMasayuki Hikita
    • Takayuki YakouKoji KurodaTetsuro HamadaKazunori KobayashiMasayuki Hikita
    • B60K17/348B60K17/35B60K23/08B60K17/20
    • B60K23/0808B60K17/3515B60W2520/10
    • A 4-wheel drive vehicle has a driving force control method in which a portion of a driving force for front wheels is distributed to rear wheels through clutches. In a 4-wheel drive state in which a driving force T.sub.p is distributed to rear wheels, for example, if the vehicle is turned leftwards to generate a difference W.sub.R -W.sub.L between left and right rear wheel speeds, it is ensured that a driving force T.sub.R distributed to the right rear wheel, which is an outer wheel during turning of the vehicle, is larger than a driving force T.sub.L distributed to the left rear wheel, which is an inner wheel during turning of the vehicle, thereby providing an enhancement in turning performance. As the difference W.sub.R -W.sub.L between the left and right rear wheel speeds is increased as a result of decreasing of the turning radius of the vehicle, the driving force T.sub.P (=T.sub.L +T.sub.R) distributed to the rear wheels is decreased to avoid an increase in travel resistance. Thus, it is possible to prevent the occurrence of problems such as a deterioration of specific fuel consumption, an abnormal sound generated in a drive system and an increase in the load of the drive system due to an increase in travel resistance during turning of the vehicle.
    • 四轮驱动车辆具有驱动力控制方法,其中前轮的驱动力的一部分通过离合器分配到后轮。 在驱动力Tp分配给后轮的四轮驱动状态下,例如,如果车辆向左转动以在左后轮速度之间产生差WR-WL,则确保驱动力 分配到作为车辆转动时的外轮的右后轮的TR大于分配给作为车辆转向期间的内轮的左后轮的驱动力TL,从而提供转向增强 性能。 由于左右后轮速度之间的差WR-WL由于车辆的转弯半径的减小而增加,所以分配给后轮的驱动力TP(= TL + TR)减小,以避免增加 在旅行阻力。 因此,能够防止由于在车辆转动期间的行驶阻力的增加而导致比燃料消耗的劣化,驱动系统中产生的异常声音和驱动系统的负载的增加等问题的发生 。
    • 7. 发明授权
    • Four-wheel drive vehicle
    • 四轮驱动车
    • US6095276A
    • 2000-08-01
    • US5690
    • 1998-01-13
    • Koji KurodaTakayuki YakouKazunori KobayashiTetsuro Hamada
    • Koji KurodaTakayuki YakouKazunori KobayashiTetsuro Hamada
    • B60K23/04B60K17/34B60K17/35B60K23/08B60K17/354
    • F16H48/30B60K17/35B60K23/0808F16H48/295B60K17/3505F16H2048/205F16H2048/346F16H48/22
    • A rear differential in a four-wheel drive vehicle includes a left and right clutches adapted to distribute a driving force transmitted from front wheels through a propeller shaft to left and right rear wheels. If the engagement of the left and right clutches is released, only the front wheels are driven and in this manner, the vehicle is brought into a front wheel-drive state. If the left and right clutches are brought into their engaged states, both of the front wheels and the rear wheels are driven and in this manner, the vehicle is brought into a four-wheel drive state. By changing the engagement forces of the left and right clutches, different driving forces can be distributed to the left and right rear wheels. In addition, when a driver operates a differential lock switch, the left and right clutches, are brought into their engaged states with the maximum engagement force, thereby integrally coupling the propeller shaft to the left and right rear wheels to provide a differential-locked state. Thus, a differential lock mechanism can be provided to the differential in a simple structure.
    • 四轮驱动车辆的后差速器包括左右离合器,其适于将从前轮传递的驱动力通过传动轴分配到左后轮和右后轮。 如果释放左右离合器的接合,则仅驱动前轮,并且以这种方式使车辆进入前轮驱动状态。 如果左右离合器进入其接合状态,则前轮和后轮都被驱动,以这种方式使车辆进入四轮驱动状态。 通过改变左右离合器的啮合力,可以将不同的驱动力分配给左右后轮。 此外,当驾驶员操作差速锁定开关时,左右离合器以最大的接合力进入其接合状态,从而将传动轴整体地联接到左右后轮以提供差速锁定状态 。 因此,可以以简单的结构向差速器提供差速锁定机构。