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    • 13. 发明授权
    • For a four-wheel-drive vehicle
    • 用于四轮驱动车辆的驱动力分配控制器
    • US06606549B1
    • 2003-08-12
    • US09658487
    • 2000-09-08
    • Tsuyoshi MurakamiRyohei Shigeta
    • Tsuyoshi MurakamiRyohei Shigeta
    • B60T712
    • B60K17/35B60K23/0808B60W2520/263B60W2520/28Y10S477/904Y10T477/606Y10T477/6414Y10T477/6422Y10T477/6424
    • A drive-force distribution controller for a four-wheel-drive vehicle in which drive force produced by an engine is transmitted directly to front or rear wheels and is transmitted to the remaining wheels via a torque distribution clutch, and the engagement force of the torque distribution clutch is controlled in accordance with traveling conditions of the vehicle. The controller includes a calculation unit for calculating variation per unit time in rotational speed difference between the front wheels and the rear wheels; and a control unit for controlling the engagement force such that the engagement force increases as the variation per unit time in the rotational speed difference increases. Alternatively, the controller includes a first judgment unit for judging which is greater, the rotational speed of the front wheels or the rotational speed of the rear wheels; and a second judgment unit which is enabled when the first judgment unit has judged that the rotational speed of the front wheels is greater than the rotational speed of the rear wheels, in order to judge whether the acceleration of the vehicle is greater than a predetermined level. The engagement force of the torque distribution clutch is controlled in accordance with results of the judgments performed by the first and second judgment units.
    • 一种用于四轮驱动车辆的驱动力分配控制器,其中由发动机产生的驱动力直接传递到前轮或后轮,并通过扭矩分配离合器传递到剩余的车轮,并且扭矩的接合力 分配离合器根据车辆的行驶状况进行控制。 控制器包括:计算单元,用于计算前轮和后轮之间的转速差的每单位时间的变化量; 以及控制单元,用于控制接合力,使得接合力随着转速差的每单位时间的变化增加而增加。 或者,控制器包括用于判断哪个更大的前轮的转速或后轮的转速的第一判断单元; 以及第二判断单元,其在第一判断单元已经判断出前轮的转速大于后轮的转速时被使能,以便判断车辆的加速度是否大于预定水平 。 扭矩分配离合器的接合力根据由第一和第二判断单元执行的判断结果来控制。
    • 18. 发明授权
    • Steering system for vehicle
    • 车辆转向系统
    • US07257474B2
    • 2007-08-14
    • US11097131
    • 2005-04-04
    • Hiroaki KatoShinji TakeuchiMinekazu MomiyamaAkihiro OhnoTsuyoshi Murakami
    • Hiroaki KatoShinji TakeuchiMinekazu MomiyamaAkihiro OhnoTsuyoshi Murakami
    • B62D6/00B62D5/00B62D6/04
    • B62D6/04B60W10/10B60W10/20B62D5/008B62D6/007B62D6/008
    • In a steering system 30, a transmission ratio R1 which is determined in dependence on the vehicle speed by reference to a transmission ratio decision map is multiplied with a first transmission ratio alteration gain g10 which is determined in dependence on the distribution of a traveling drive torque from an engine 11 to front wheels 14 and rear wheels 15, thereby to alter the ratio R1 of steering torque distribution from a steering handle 31 to the front wheels 14, whereby the variation of the steering feeling due to an increase or decrease in the distribution of the traveling drive torque to the front wheels 14 can be suppressed. Further, the transmission ratio R1 is multiplied with a second transmission ratio alteration gain g11 which is determined in dependence on the gradient of the road surface by reference to a second transmission ratio alteration map, thereby to alter the transmission ratio R1, whereby the variation of the steering feeling due to the variation of the gradient can also be suppressed.
    • 在转向系统30中,通过参照传动比决定图将根据车速确定的传动比R 1乘以第一传动比变更增益g 10,该第一变速比改变增益g 10根据行驶 从发动机11到前轮14和后轮15的驱动扭矩,从而改变转向转向分配从转向手柄31到前轮14的比率R 1,从而由于增加或减少转向感觉的变化 可以抑制向前轮14的行驶驱动扭矩的分配。 此外,传动比R 1与通过参照第二传动比变更图相对于路面的坡度而确定的第二传动比变更增益g 11相乘,从而改变传动比R 1,由此 也可以抑制由于梯度的变化引起的转向感的变化。
    • 19. 发明授权
    • Power distribution control apparatus of four-wheel drive vehicle
    • 四轮驱动车配电控制装置
    • US07048084B2
    • 2006-05-23
    • US10885611
    • 2004-07-08
    • Ryouhei ShigetaTsuyoshi MurakamiHisao FumotoYutaka Hirokane
    • Ryouhei ShigetaTsuyoshi MurakamiHisao FumotoYutaka Hirokane
    • B60K17/35
    • B60K23/0808B60K17/35B60W2510/0604B60W2520/10
    • A CPU computes a throttle opening degree increasing speed Vθh and a steering wheel angular velocity Vθ based on a throttle opening degree θh and a steering wheel angle θ. Based on the throttle increasing speed Vθh and the steering wheel angular velocity Vθ, the CPU selects one of a first drive mode and a second drive mode. The CPU controls the power transmission ratio of a power transmitting device according to the selected drive mode. Therefore, the power transmission ratio of the power transmitting device is properly controlled in accordance with the degree of intention for acceleration of the driver, which is computed based on the throttle increasing speed Vθh, and the turning speed of the steering wheel, which is computed based on the steering wheel angular velocity Vθ. Therefore, the drive mode is properly switched in accordance with the driving state of a four-wheel drive vehicle.
    • CPU基于节气门开度和方向盘角度θ计算节气门开度增加速度Vthetah和方向盘角速度Vthta。 基于节气门增加速度Vthetah和方向盘角速度Vtheta,CPU选择第一驱动模式和第二驱动模式中的一个。 CPU根据选择的驱动模式来控制动力传递装置的动力传动比。 因此,根据基于节气门增加速度Vthetah计算的驾驶员的加速意图和计算出的方向盘的转动速度,适当地控制动力传递装置的动力传动比 基于方向盘角速度Vta。 因此,根据四轮驱动车辆的行驶状态适当地切换驱动模式。
    • 20. 发明授权
    • Drive system control method and drive power transmission control system for vehicle
    • US06935455B2
    • 2005-08-30
    • US10994244
    • 2004-11-23
    • Tsuyoshi MurakamiAkihiro Ohno
    • Tsuyoshi MurakamiAkihiro Ohno
    • B60K17/35B60K23/08F16D43/20
    • B60K23/0808
    • A drive system control method and a drive power transmission control system for a four-wheel drive vehicle are provided for enabling the vehicle to operate selectively in an ordinary mode and an anti-vibration mode. In the ordinary mode, the connection force of a coupling device which is provided between front and rear wheel torque transmission axles is kept relatively high, and the front and rear wheel torque transmission axles are brought to connect prime drive wheels with secondary drive wheels, so that four-wheel drive traveling of the vehicle can be realized. The operation mode of the vehicle is switched from the ordinary mode to the anti-vibration mode where the secondary drive wheels slip when the vehicle begins to start in the ordinary mode. In the anti-vibration mode, the connection force of the coupling device is relatively weakened to substantially separate the front and rear wheel torque transmission axles from each other. Thus, the resilient force produced by the torsion of the front and rear wheel torque transmission axles which is caused by the slip of the prime drive wheels or the secondary drive wheels is released between the front and rear wheel torque transmission axles, so that the vibration which would otherwise be generated when the vehicle performs the four-wheel drive starting can be suppressed compared with that in the prior art.