Control unit for four-wheel drive vehicle
    4.
    发明专利
    Control unit for four-wheel drive vehicle 有权
    四轮驱动车辆控制单元

    公开(公告)号:JP2014034325A

    公开(公告)日:2014-02-24

    申请号:JP2012177377

    申请日:2012-08-09

    发明人: MATSUNO KOJI

    IPC分类号: B60K17/348

    摘要: PROBLEM TO BE SOLVED: To add an appropriate yaw moment to a vehicle by suppressing slippage of main drive wheels while preventing even a four-wheel drive vehicle which includes clutch elements for left and right wheels respectively, from: having the left and right wheels run differently due to a difference between the clutch elements; or having either the left or right wheels run solely.SOLUTION: A yaw moment that suppresses an understeer tendency of a vehicle is calculated as a target yaw moment Mzt. In a case a mean wheel speed of left and right wheels on a front axle exceeds a wheel speed of a turning outer wheel on a rear axle, when the target yaw moment Mzt is added to the vehicle, a wheel clutch on a side of a turning outer wheel on the rear axle is engaged, a wheel clutch on a side of a turning inner wheel is disengaged, and an engagement force for a transfer clutch 15 is controlled based on the target yaw moment Mzt. In a case a mean wheel speed of the left and right wheels on the front axle does not exceed the wheel speed of a turning outer wheel on the rear axle, the transfer clutch 15 and the left and right wheel clutches 17l and 17r are disengaged.

    摘要翻译: 要解决的问题:通过抑制主驱动轮的滑动,同时防止包括左轮和右轮的离合器元件的四轮驱动车辆分别从左和右轮运行,从而向车辆增加适当的横摆力矩 不同之处在于离合器元件之间的差异; 或者左轮或右轮仅仅运行。解决方案:计算抑制车辆转向不足趋势的偏航力矩作为目标横摆力矩Mzt。 在前轴上的左右车轮的平均车轮速度超过后轴上的转向外轮的车轮速度的情况下,当将目标横摆力矩Mzt添加到车辆时,在侧面的车轮离合器 转向后轮的外轮接合,转向内轮一侧的车轮离合器被分离,并且基于目标横摆力矩Mzt来控制传递离合器15的接合力。 在前轮左右轮的平均车轮速度不超过后轮上的转动外轮的车轮速度的情况下,传递离合器15以及左右轮离合器171和17r分离。