Provided is a hydraulic pressure control system of an automatic transmission, capable of previously preventing an accident due to a sudden unintended acceleration by controlling hydraulic pressure of an automatic transmission not to allow power of an engine to be transmitted to a drive shaft, when the sudden unintended acceleration is sensed in a vehicle. In accordance with an embodiment of the present invention, the hydraulic pressure control system of the automatic transmission comprises: a valve body having a plurality of ports including a suction port receiving oil and a discharge port discharging the oil mounted therein, wherein the valve body is combined with a valve spool corresponding to the plurality of ports to form a line pressure control valve and a torque converter control valve; and a valve drive unit to lower the hydraulic pressure supplied to the torque convertor by allowing a suction port and a discharge port of the line pressure control valve to communicate with each other through a fluid by applying a force to a valve spool of the line pressure control valve.
차량에서 급발진 신호가 감지되었을 때, 자동변속기의 유압을 제어하여 엔진의 동력이 구동축으로 전달되지 않게 함으로써 급발진으로 인한 사고를 미연에 방지할 수 있는 자동변속기의 유압제어 시스템이 제공된다. 본 발명의 일 실시예에 따른 자동변속기의 유압제어 시스템은 오일을 공급받는 흡입포트 및 오일을 배출시키는 토출포트를 포함한 다수의 포트들을 내장하며, 상기 다수의 포트들에 대응되는 밸브스풀과 조합되어 라인압력 조절밸브와 토크컨버터 조절밸브를 형성하는 밸브바디; 라인압력 조절밸브의 밸브스풀에 힘을 가하여 라인압력 조절밸브의 흡입포트와 토출포트가 유체 연통되게 함으로써, 토크컨버터에 공급되는 유압을 저하시키는 밸브구동장치를 포함한다.
HYDRAULIC PRESSURE CONTROL SYSTEM OF AUTOMATIC TRANSMISSION
자동변속기의 유압제어 시스템
24.11.2015
Patent
Elektronische Ressource
Koreanisch
IPC: | B60K Anordnung oder Einbau von Antriebseinheiten oder von Kraft- bzw. Drehmomentübertragungen in Fahrzeugen , ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES |
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