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    • 3. 发明授权
    • Control system for hydraulically operated vehicle transmission
    • 液压操纵车辆传动控制系统
    • US5707315A
    • 1998-01-13
    • US608692
    • 1996-02-29
    • Hideo FurukawaTatsuyuki Ohashi
    • Hideo FurukawaTatsuyuki Ohashi
    • B60W10/04B60W10/10B60W10/11F16H59/64F16H59/72F16H61/02F16H59/78
    • F16H59/72F16H59/64Y10T477/65Y10T477/653
    • A vehicle automatic transmission control system which makes it possible to estimate an ATF temperature without using an expensive ATF temperature sensor. The estimation of the ATF temperature is configured such that based on the coolant temperature at engine starting, the temperature increase owing to heat inflow to the ATF per unit time and the temperature decrease owing to heat outflow from the ATF per unit time are calculated quantitatively and the sum of the calculated values is used to determine the estimated ATF temperature TATF. More specifically, when it is found that only a short time has passed between engine turnoff and restarting, the ATF temperature is estimated at engine restarting from the coolant temperature at engine turnoff, the estimated ATF temperature at engine turnoff and the coolant temperature at engine restarting. On the other hand, when the time between engine turnoff and restarting is found to be long, both the coolant and the ATF are assumed to be completely cooled and the ATF temperature is in principle defined as the coolant temperature at restarting.
    • 一种车辆自动变速器控制系统,其可以在不使用昂贵的ATF温度传感器的情况下估计ATF温度。 ATF温度的估计被配置为使得基于发动机起动时的冷却剂温度,由于每单位时间的ATF的热流入的温度升高和由于每单位时间的ATF的热量流出而导致的温度降低被定量地计算,并且 使用计算值的和来确定估计的ATF温度TATF。 更具体地说,当发现在发动机关闭和重新启动之间经过短时间时,在发动机关闭时的冷却剂温度,发动机关闭时估计的ATF温度和发动机重新启动时的冷却剂温度下,在发动机重新起动时估计ATF温度 。 另一方面,当发动机关闭和重新启动之间的时间被发现为长时,假设冷却剂和ATF都被完全冷却,并且ATF温度原则上被定义为重新启动时的冷却剂温度。
    • 6. 发明申请
    • WORK VEHICLE
    • 工作车辆
    • US20160144860A1
    • 2016-05-26
    • US14903316
    • 2014-06-18
    • KOMATSU LTD.
    • Makoto NAITOShinichi NAITO
    • B60W30/18E02F9/20F16H3/46B60W10/02B60W10/115
    • F16H61/16B60W2710/1083E02F9/202E02F9/2253E02F9/226F16H3/46F16H57/0412F16H59/64F16H61/02F16H61/0206F16H61/686F16H2059/725F16H2200/2005
    • A hydraulic oil supply circuit of a work vehicle is configured to supply hydraulic oil to a transmission. A hydraulic oil warming circuit is configured to warm up the hydraulic oil. A control unit is configured to control the transmission, the hydraulic oil supply circuit, and the hydraulic oil warming circuit. The transmission includes a hydraulic clutch and a clutch control valve. The clutch control valve is configured to control the pressure of the hydraulic oil supplied to the hydraulic clutch according to a command from the control unit. When the control unit determines that the temperature of the hydraulic oil is low, it is configured to output a warming up command for operation of a warming up function. The hydraulic oil warming circuit is configured to warm up the hydraulic oil by causing a pressure loss in a flow path for the hydraulic oil.
    • 工作车辆的液压油供给回路被配置为向变速器供给液压油。 液压油加热回路构造为预热液压油。 控制单元构造成控制变速器,液压油供给回路和液压油加热回路。 变速器包括液压离合器和离合器控制阀。 离合器控制阀被配置为根据来自控制单元的命令来控制供给到液压离合器的液压油的压力。 当控制单元确定液压油的温度低时,其被配置为输出用于预热功能的操作的预热命令。 液压油加热回路构成为通过在液压油的流路中产生压力损失来预热液压油。