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AssigneesKia Motors Corporation, Hyundai Motor Company
InventorsJong Hyun KIM, SangLok SONG, Seungjae KANG, Haksung LEE
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A hydraulic pressure producing system for an automatic transmission, and a control method thereof may include a first hydraulic pump adapted to generate hydraulic pressure for shifting, a second hydraulic pump adapted to additionally generate hydraulic pressure when hydraulic pressure supplied from the first hydraulic pump is insufficient, an accumulator adapted to store hydraulic pressure excessively generated from the first hydraulic pump, and a control unit controlling the second hydraulic pump. The method may include operating the first hydraulic pump in a state of idle stop, predicting a finish point of the idle stop state, starting operation of the second hydraulic pump prior to a predetermined time from the predicted finish point, operating the second hydraulic pump with a predetermined maximum rotation speed, and operating the second hydraulic pump with a target rotation speed.
A control method of a hydraulic pressure producing system for an automatic transmission, the hydraulic pressure producing system having a first hydraulic pump adapted to generate a first hydraulic pressure for shifting, a second hydraulic pump adapted to additionally generate a second hydraulic pressure when the first hydraulic pressure supplied from the first hydraulic pump is insufficient fir shifting, an accumulator adapted to store hydraulic pressure excessively generated from the first hydraulic pump, and a control unit controlling the second hydraulic pump, the method comprising:
A hydraulic pressure producing system for an automatic transmission, comprising:
A hydraulic pressure producing system for an automatic transmission, comprising:
Dependencies are inferred from the claim text.