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    Electronic transmission control system with fail-safe system for automotive vehicle with continuously variable automatic transmission
    3.
    发明公开
    Electronic transmission control system with fail-safe system for automotive vehicle with continuously variable automatic transmission 失效
    电子变速器控制系统故障 - 安全用于汽车系统的无级变速器

    公开(公告)号：EP0890762A2

    公开(公告)日：1999-01-13

    申请号：EP98112592.5

    申请日：1998-07-07

    申请人： NISSAN MOTOR COMPANY, LIMITED

    发明人： Suzuki, Akito ,  Jozaki, Tateki ,  Okahara, Hirofumi

    IPC分类号： F16H61/00 ,  F16H61/12

    CPC分类号： F16H61/12 ,  F16H61/66259 ,  F16H2061/1208 ,  F16H2061/1244 ,  F16H2061/126 ,  Y10S477/906 ,  Y10T477/6242 ,  Y10T477/62427 ,  Y10T477/62429

    摘要： An electronic transmission control system having a fail-safe system for an automotive vehicle with a continuously variable automatic transmission whose speed-change ratio (i p ) is changeable continuously depending on vehicle speed (VSP) and engine load (TVO), comprises a hydraulic modulator (12,13,14,15,16,21,25,26) producing at least a regulated line pressure (P L ) necessary to adjust the speed-change ratio (i p ) hydraulically, a desired speed-change ratio arithmetic processing section for calculating a desired speed-change ratio (N pri /N sec ) based on the vehicle speed and the engine load, and a desired line pressure arithmetic processing section for retrieving a desired line pressure (P LO ) based on the speed-change ratio (N pri /N sec ) and the engine load (TVO) from a predetermined characteristic map (Fig.5). Also provided is a fail-safe section (30,40,steps 44 or 54) comprising a comparing portion for comparing the desired line pressure (P LO ) to a predetermined line pressure threshold (D S1 ,D S2 ) above which the desired line pressure (P LO ) is within an unreasonably high line pressure zone, a decision portion for deciding whether the desired line pressure (P LO ) is above the predetermined line pressure threshold (D S1 ,D S2 ), and a speed-change ratio retaining portion for retaining the speed-change ratio (i p ) unchanged, when the desired line pressure (P LO ) exceeds the predetermined line pressure threshold (D S1 ,D S2 ).

    摘要翻译： 具有机动车辆为一个故障安全系统的无级变速自动变速器是谁的变速比（IP）的电子变速控制系统是可变的连续根据车辆速度（VSP）和发动机负荷（TVO）包括液压调节器 （12,13,14,15,16,21,25,26）至少产生一个调节的管线压力（PL）需要调整变速比（IP）液压地，期望的变速比算术处理部分，用于 基于车辆速度和发动机负荷，以及期望的管路压力算术用于基于所述变速比检索希望的管线压力（PLO）（N PRI / N秒处理部计算希望的变速比（N PRI / N秒） ）和从预定的特性图中的发动机载荷（TVO）（图5）。 所以提供一种故障安全部分（30,40，44个或步骤54），包括用于所希望的管线压力（PLO）与预定线压力阈值（DS1，DS2）比较部分上方其中所需管线压力（PLO ）是内的不合理的高线压力区，用于决定是否所期望的管路压力（PLO）高于预定线压力阈值（DS1，DS2）的决定部，和用于保持变速一个变速比保持部 比率（IP）不变，当所希望的管线压力（PLO）超过预定线压力阈值（DS1，DS2）。

    Hydraulic control device for belt-and-pulley type continuously variable transmission for a vehicle
    5.
    发明公开
    Hydraulic control device for belt-and-pulley type continuously variable transmission for a vehicle 失效
    用于汽车的带式和型式连续变速箱的液压控制装置

    公开(公告)号：EP0304085A3

    公开(公告)日：1990-10-24

    申请号：EP88113523.0

    申请日：1988-08-19

    申请人： TOYOTA JIDOSHA KABUSHIKI KAISHA

    发明人： Soga, Yoshinobu ,  Sugaya, Masami ,  Kouno, Katsumi ,  Okawa, Susumu

    IPC分类号： F16H59/06 ,  B60K41/14 ,  F16H37/02

    CPC分类号： B60W30/18 ,  B60W10/04 ,  B60W10/101 ,  B60W30/1819 ,  F02B2075/025 ,  F16H47/065 ,  F16H61/66 ,  F16H61/66259 ,  Y10T477/624 ,  Y10T477/62429

    摘要： A hydraulic control device for controlling a belt-and-pulley type continuously variable transmission for a motor vehicle which has two variable-diameter pulleys connected by a belt, and two hydraulic actuators for changing effective diameters of the pulleys. The hydraulic control device includes a first and a second pressure regulating valve for adjusting a pressure of a fluid supplied from a hydraulic power source, respectively to a first line pressure and a second line pressure lower than the first line pressure, and a CVT shift control valve device for controlling a speed ratio of the transmission. The valve device includes a shift-direction switching directional control valve and a shift-speed control flow control valve. The directional control valve is operable between a first position in which one of the hydraulic actuators communicates with a first pressure line having the first line pressure, while the other actuator communicates with an atmosphere or a second pressure line having a second line pressurer, and a second position in which the above-indicated one actuator communicates with the atmosphere or second pressure line while the other actuator communicates with the first pressure line. The flow control valve controls rates of flows of the fluid to and from the actuators, in response to an operation of the directional control valve.