Speed control for a utility vehicle
    1.
    发明授权
    Speed control for a utility vehicle 有权
    多用途车的速度控制

    公开(公告)号:US06655233B2

    公开(公告)日:2003-12-02

    申请号:US09905272

    申请日:2001-07-13

    IPC分类号: F16H4702

    摘要: A cruise control system for a utility vehicle, which is speed-controlled by a hydrostatic transmission, includes a controller having an input for receiving a selectable set speed signal, and an output for sending a speed control signal to at least one proportional valve of a hydrostatic transmission servo control system. The vehicle ground speed is continuously monitored by a speed sensor operatively associated with a rotating gear in the vehicle drive train that rotates in proportion to vehicle ground speed, to create a ground speed signal. The selectable set speed signal can be input to controller memory by driving the vehicle at a desired ground speed and then activating a speed set switch. The speed control algorithm of the controller thereafter compares the set speed to the ground speed signal from the speed sensor and corrects the control signal to the proportional valve to correct hydrostatic transmission speed output.

    摘要翻译: 用于通过液压传动速度控制的多用途车的巡航控制系统包括具有用于接收可选择的设定速度信号的输入的控制器和用于将速度控制信号发送到至少一个比例阀的输出 液压传动伺服控制系统。 通过与车辆传动系中的与车辆地面速度成比例地旋转的旋转齿轮可操作地相关联的速度传感器连续监测车辆地面速度,以产生地面速度信号。 可选择的设定速度信号可以通过以期望的地面速度驾驶车辆然后启动速度设定开关来输入到控制器存储器。 然后,控制器的速度控制算法将速度传感器的设定速度与地面速度信号进行比较,并将控制信号校正到比例阀,以校正液压传动速度输出。

    Hydrostatic transmission controls with alternative operating modes
    3.
    发明授权
    Hydrostatic transmission controls with alternative operating modes 有权
    静液压传动控制与替代操作模式

    公开(公告)号:US07310943B2

    公开(公告)日:2007-12-25

    申请号:US11297966

    申请日:2005-12-09

    IPC分类号: F16D31/02

    摘要: A hydrostatic transmission on a tractor is operated by a microcontroller providing current commands to the hydrostatic transmission pump, and manual controls that provide signals to the microcontroller so the current commands cause the hydrostatic transmission to operate in either a first mode or a second mode. In the first or automatic mode the swash plate position may be continuously variable based on the position of a foot pedal. In the second or gear mode the swash plate may be moved to any of a plurality of discrete positions based on the position of a manually operable switch.

    摘要翻译: 拖拉机上的静液压传动由微控制器提供流体静力传动泵的电流命令,以及向微控制器提供信号的手动控制器,因此目前的命令导致静液压传动以第一模式或第二模式工作。 在第一或自动模式中,斜盘位置可以基于脚踏板的位置而连续地变化。 在第二或齿轮模式中,斜盘可以基于手动操作的开关的位置移动到多个离散位置中的任何一个。

    Anti-stall transmission control for utility vehicle
    4.
    发明授权
    Anti-stall transmission control for utility vehicle 失效
    多功能车的防失速变速箱控制

    公开(公告)号:US06675577B2

    公开(公告)日:2004-01-13

    申请号:US09905276

    申请日:2001-07-13

    申请人: Mark David Evans

    发明人: Mark David Evans

    IPC分类号: F16D3102

    摘要: A control system for a utility vehicle, particularly a compact utility tractor, that is speed-controlled by a hydrostatic transmission, prevents engine stalling by automatically reducing the stroke of a pump of the hydrostatic transmission, and thus reducing the vehicle speed, when the unloaded engine speed drops below a predetermined threshold. The apparatus includes a servo controlled hydrostatic transmission, an engine speed sensor, a throttle position sensor and a controller. The unloaded engine speed is determined by either an engine throttle lever position or by an engine speed capture algorithm that continuously monitors engine speed and records engine speed occurring when the transmission control pedals are positioned in neutral.

    摘要翻译: 用于通过静液传动速度控制的多用途车辆,特别是紧凑型实用拖拉机的控制系统通过自动减少静液压变速器的泵的行程来防止发动机失速,从而降低车辆速度,当卸载 发动机转速下降到预定的阈值以下。 该装置包括伺服控制的静液传动装置,发动机速度传感器,节气门位置传感器和控制器。 无负载的发动机速度由发动机节气门杆位置或发动机速度捕捉算法确定,该算法连续监视发动机转速并记录当变速器控制踏板处于空档时发生的发动机转速。

    Hydrostatic transmission controls to simulate gear drive
    5.
    发明授权
    Hydrostatic transmission controls to simulate gear drive 有权
    液压传动控制模拟齿轮传动

    公开(公告)号:US07373776B2

    公开(公告)日:2008-05-20

    申请号:US11299036

    申请日:2005-12-09

    IPC分类号: F16D31/02

    摘要: A control apparatus is provided for a hydrostatic transmission to simulate a gear drive on a tractor. The hydrostatic transmission has a swashplate that is angularly movable to a plurality of positions, and a proportional valve that provides a control pressure to a servo piston to control the hydrostatic transmission swashplate position. A transmission control lever may be moved to a plurality of positions, each position providing a different voltage signal to a microcontroller. The microcontroller receives and converts a voltage signal to a coil current to actuate the proportional valve.

    摘要翻译: 提供一种控制装置用于静液压传动以模拟拖拉机上的齿轮传动。 静液压传动装置具有能够多个位置成角度地移动的斜盘,以及向伺服活塞提供控制压力以控制静液压传动斜盘位置的比例阀。 变速器控制杆可以移动到多个位置,每个位置向微控制器提供不同的电压信号。 微控制器接收并将电压信号转换成线圈电流以致动比例阀。

    Fan shroud with integral hood seal
    8.
    发明授权
    Fan shroud with integral hood seal 有权
    风扇罩与一体式封盖

    公开(公告)号:US07418994B2

    公开(公告)日:2008-09-02

    申请号:US10866289

    申请日:2004-06-11

    IPC分类号: F01P3/18

    CPC分类号: B60K11/02

    摘要: A one piece fan shroud for a tractor has first and second faces, a frame with top, left and right sides, a bottom, and an upper wall extending from the top of the frame. The upper wall, left and right sides of the fan shroud are dimensioned to match the internal geometry and seal with an internal surface of a tractor hood. A rubber seal may extend around the upper wall and the left and right sides of the frame.

    摘要翻译: 用于拖拉机的单件风扇罩具有第一和第二面,具有顶部,左侧和右侧的框架,底部以及从框架的顶部延伸的上壁。 风扇护罩的上壁,左侧和右侧的尺寸适合内部几何形状,并与拖拉机罩的内表面密封。 橡胶密封件可以围绕框架的上壁和左侧和右侧延伸。