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
2015-11-24
Patent
Electronic Resource
Korean
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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