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46 条记录 (耗时 0.014 秒)

    Hydraulic control apparatus for vehicle transmission system, incorporating valves for reverse inhibit valve
    43.
    发明公开
    Hydraulic control apparatus for vehicle transmission system, incorporating valves for reverse inhibit valve 失效
    用于车辆传动系统的液压控制装置，用于反向禁止阀的阀门

    公开(公告)号：EP0412718A3

    公开(公告)日：1992-12-02

    申请号：EP90308498.6

    申请日：1990-08-01

    申请人： TOYOTA JIDOSHA KABUSHIKI KAISHA

    发明人： Kato, Nobuyuki ,  Habuchi, Ryoji ,  Morisawa, Kunio ,  Itoh, Hiroshi

    IPC分类号： F16H61/16

    CPC分类号： F16H61/16 ,  F16H61/66259 ,  Y10T477/6217 ,  Y10T477/624 ,  Y10T477/6935

    摘要： A hydraulic control apparatus for a vehicle power transmission for transmitting power from an engine to a drive wheel a reversing mechanism (16) having a reverse position established by a hydraulic actuator (70). The apparatus includes a reverse inhibit valve (420) disposed in a hydraulic line leading to the hydraulic actuator and having a reverse inhibit position for inhibiting the mechanism (16) from being placed in the reverse position and a non-inhibit position for permitting the mechanism to be placed in the reverse position. The apparatus uses a first and a second pilot pressure generating device (344, 346; 392, 394) for producing a first and a second pilot pressure (Psol4, Psol5), respectively. A relay valve (380) is provided for producing a first hydraulic signal for establishing the reverse inhibit position of the reverse inhibit valve, based on one of combinations of operating states of the two pilot pressure generating devices, and a second hydraulic signal for establishing the non-inhibit position, based on the other combinations.

    ELEKTRO-HYDRAULISCHE STEUERUNG FÜR EIN AUTOMATISCH ZU SCHALTENDES KRAFTFAHRZEUGGETRIEBE
    44.
    发明授权
    ELEKTRO-HYDRAULISCHE STEUERUNG FÜR EIN AUTOMATISCH ZU SCHALTENDES KRAFTFAHRZEUGGETRIEBE 失效
    自动齿轮箱的电液控制

    公开(公告)号：EP0316358B1

    公开(公告)日：1990-04-11

    申请号：EP87905435.1

    申请日：1987-08-01

    申请人： ZF FRIEDRICHSHAFEN Aktiengesellschaft

    发明人： GIERER, Georg

    IPC分类号： F16H61/16

    CPC分类号： F16H61/12 ,  F16H59/40 ,  F16H61/0206 ,  F16H61/16 ,  F16H61/686 ,  F16H2059/006 ,  F16H2061/1232 ,  F16H2061/1236 ,  F16H2061/1244 ,  F16H2061/1268 ,  F16H2306/00 ,  Y10S477/906 ,  Y10T477/6934 ,  Y10T477/6935

    摘要： Electrohydraulic control for an automatic gear-box, comprising a selection slide valve (2), at least for the neutral position (N) as well as for the drive mode (D) and reverse mode (R), an electronic control device (3), electrovalves (4) held in the neutral position by the effect of spring action, a source of pressure (1), pressure control valves and gear control valves (5, 6, 7) for actuating the gear engagement and brakes (A-F), as well as a reverse safety valve (8) to prevent engagement of the reverse gear when the forward drive speed is too high, and a system which, in the event of a fault in the electronic circuit, holds or changes the automatic gear-box to a gear ensuring that the maximum permissible engine speed is not exceeded when the vehicle travels at maximum speed. In the event of a failure in the electronic control device (3) during travel, a control system holds or changes the gear, and in the event of a failure in said device (3), before starting or restarting of the engine, this control system (5, 6, 7, 8, 9) engages a lower gear. In the event of a fault in the electronic system during travel, the movement of the vehicle may continue unhampered, even for example in the highest gear, without changing down. In the event of a fault in the electronic circuit when stationary or during a further start of the engine following a failure during travel, a lower gear is engaged to allow starting.