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    • 20. 发明授权
    • Hydraulic control apparatus for V-belt type continuously variable transmission
    • V型无级变速器液压控制装置
    • US07211013B2
    • 2007-05-01
    • US10661825
    • 2003-09-12
    • Shinichiro WatanabeNaoya InoueMakoto Sawada
    • Shinichiro WatanabeNaoya InoueMakoto Sawada
    • F16H61/00F16H61/06
    • F16H61/66272F16H61/0021F16H2059/6823Y10T477/624
    • There is provided a hydraulic control apparatus for a belt CVT, which is comprised of a pulley pressure control section that controls the line pressure in accordance with the oil amount balance of an oil pump based on the engine speed and the oil temperature during a select-judgment period from the detection of a change from a driving range to a non-driving range or a change from the non-driving range to the driving range to the lapse of a predetermined period of time, or when the non-driving range is detected. This eliminates the possibility that the oil pump cannot generate a specified oil pressure due to a decrease in the engine speed. Further, the secondary pressure is multiplied by the ratio of the line pressure in accordance with the oil amount balance of the oil pump to the line pressure which has been intended to be specified, and the secondary pressure is controlled according to the calculation result. This makes it possible to maintain the pulley ratio without causing a down-shift of the belt CVT.
    • 提供一种用于带CVT的液压控制装置,其包括:皮带轮压力控制部,其根据在选择期间的发动机转速和油温度,根据油泵的油量平衡来控制管路压力; 从检测到从驾驶范围到非驾驶范围的变化的判定期间,或者从非行驶范围向驾驶范围向预定时间段过去的判定期间,或者当检测到非驾驶范围时 。 这消除了由于发动机转速的降低,油泵不能产生指定的油压的可能性。 此外,二次压力乘以根据油泵的油量平衡与预定规定的管路压力的管路压力的比率,并且根据计算结果控制二次压力。 这使得可以保持皮带轮比率而不引起皮带CVT的下移。