Hydraulic pressure supply system of automatic transmission
원문보기
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
F15B-011/00
F04B-049/00
F16H-061/00
F16H-061/02
F04B-023/04
출원번호
US-0712723
(2012-12-12)
등록번호
US-9316221
(2016-04-19)
우선권정보
KR-10-2012-0097302 (2012-09-03)
발명자
/ 주소
Wi, Taehwan
Hwang, Jin Young
Jo, Se Hwan
출원인 / 주소
Hyundai Motor Company
대리인 / 주소
Morgan, Lewis & Bockius LLP
인용정보
피인용 횟수 :
0인용 특허 :
7
초록▼
A hydraulic pressure supply system may include a low-pressure hydraulic pump receiving the oil stored in the oil pan and generating the low hydraulic pressure, a low-pressure regulator valve controlling the low hydraulic pressure of the first low-pressure line, a reducing valve fluid-connected to th
A hydraulic pressure supply system may include a low-pressure hydraulic pump receiving the oil stored in the oil pan and generating the low hydraulic pressure, a low-pressure regulator valve controlling the low hydraulic pressure of the first low-pressure line, a reducing valve fluid-connected to the low-pressure regulator valve and supplying a hydraulic pressure to the low pressure portion, a high-pressure hydraulic pump increasing the low hydraulic pressure supplied from the low-pressure hydraulic pump, a switch valve disposed between the first low-pressure line and the high-pressure line, and selectively connecting the first low-pressure line and the high-pressure line, a high-pressure regulator valve controlling the increased hydraulic pressure supplied from the high-pressure hydraulic pump and the low hydraulic pressure selectively supplied from the low-pressure hydraulic pump through the switch valve, and supplying the stable high hydraulic pressure to the high pressure portion.
대표청구항▼
1. A hydraulic pressure supply system of an automatic transmission for a vehicle which generates low hydraulic pressure and high hydraulic pressure using oil stored in an oil pan and supplies the low hydraulic pressure and the high hydraulic pressure respectively to a low pressure portion and a high
1. A hydraulic pressure supply system of an automatic transmission for a vehicle which generates low hydraulic pressure and high hydraulic pressure using oil stored in an oil pan and supplies the low hydraulic pressure and the high hydraulic pressure respectively to a low pressure portion and a high pressure portion, the hydraulic pressure supply system comprising: a low-pressure hydraulic pump receiving the oil stored in the oil pan through a first input line that fluid-connects the oil pan and the low-pressure hydraulic pump, generating the low hydraulic pressure, and discharging the low hydraulic pressure to a first low-pressure line;a low-pressure regulator valve fluid-connected to the first low-pressure line and controlling the low hydraulic pressure of the first low-pressure line to be stable low hydraulic pressure;a reducing valve fluid-connected to the low-pressure regulator valve and receiving the stable low hydraulic pressure from the low-pressure regulator valve through a second low-pressure line, lowering the stable low hydraulic pressure, and supplying a hydraulic pressure to the low pressure portion through a third low-pressure line;a high-pressure hydraulic pump fluid-connected to the first low pressure line and increasing the low hydraulic pressure supplied from the low-pressure hydraulic pump through the first low-pressure line, and discharging the high hydraulic pressure to a high-pressure line fluid-connected to the high-pressure hydraulic pump;a switch valve disposed between the first low-pressure line and the high-pressure line, and selectively connecting the first low-pressure line and the high-pressure line;a high-pressure regulator valve fluid-connected to the high-pressure line and controlling the increased hydraulic pressure supplied from the high-pressure hydraulic pump through the high-pressure line and the low hydraulic pressure selectively supplied from the low-pressure hydraulic pump through the switch valve to be a stable high hydraulic pressure, and supplying the stable high hydraulic pressure to the high pressure portion; anda second input line connecting the oil pan to the first low-pressure line;wherein the high-pressure regulator valve is selectively connected to the first low-pressure line through the switch valve and is directly connected to the high-pressure line so as to supply a portion of hydraulic pressure supplied from the first low-pressure line or the high-pressure line to a supply line and to control the high hydraulic pressure to be stable, andwherein the supply line is connected to the third low-pressure line. 2. The hydraulic pressure supply system of claim 1, wherein the low-pressure hydraulic pump is a mechanical hydraulic pump driven by an engine, and the high-pressure hydraulic pump is an electric hydraulic pump driven by an electric motor. 3. The hydraulic pressure supply system of claim 1, wherein the low-pressure regulator valve is controlled by a control pressure of a first solenoid valve being an on/off solenoid valve. 4. The hydraulic pressure supply system of claim 1, wherein the reducing valve is controlled by a control pressure of a first solenoid valve being an on/off solenoid valve. 5. The hydraulic pressure supply system of claim 1, wherein the switch valve is controlled by a control pressure of a first solenoid valve being an on/off solenoid valve. 6. The hydraulic pressure supply system of claim 1, wherein the low-pressure regulator valve is connected to the first low-pressure line and is connected to the first input line through a first recirculation line so as to recirculate a portion of the low hydraulic pressure supplied through the first low-pressure line to the first input line through the first recirculation line and to control the low hydraulic pressure to be stable. 7. The hydraulic pressure supply system of claim 1, wherein the low-pressure regulator valve is controlled by a control pressure of a first solenoid valve, an elastic force of an elastic member, and a portion of the low hydraulic pressure of the first low-pressure line wherein the portion of the low hydraulic pressure of the first low-pressure line counteracts the control pressure of the first solenoid valve. 8. The hydraulic pressure supply system of claim 6, wherein the reducing valve is connected to the second low-pressure line and is connected to the first input line through a second recirculation line so as to recirculate a portion of the stable low hydraulic pressure supplied through the second low-pressure line to the first input line through the second recirculation line and to further lower the stable low hydraulic pressure. 9. The hydraulic pressure supply system of claim 1, wherein the reducing valve is controlled by a control pressure of a first solenoid valve, an elastic force of an elastic member, and a portion of the hydraulic pressure of the third low-pressure line wherein the portion of the hydraulic pressure of the third low-pressure line counteracts the control pressure of the first solenoid valve. 10. The hydraulic pressure supply system of claim 3, wherein the high-pressure regulator valve is controlled by a control pressure of a second solenoid valve, an elastic force of an elastic member, and the low hydraulic pressure of the first low-pressure line or the high-pressure line counteracting the control pressure of the second solenoid valve. 11. The hydraulic pressure supply system of claim 10, wherein the second solenoid valve is a proportional control solenoid valve. 12. The hydraulic pressure supply system of claim 1, wherein the switch valve is controlled by a control pressure of a first solenoid valve so as to disconnect the first low-pressure line from the high-pressure line when the first solenoid valve is switched off and to connect the first low-pressure line to the high-pressure line when the first solenoid valve is switched on. 13. The hydraulic pressure supply system of claim 1, wherein a check valve for preventing back flow is mounted on the second input line.
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이 특허에 인용된 특허 (7)
Takagi,Akira; Suzuki,Fuminori, Driving force transmitting system.
Wakahara Tatsuo,JPX ; Murakami Kenichiro,JPX, Hydraulic-pressure control system for four-wheel drive vehicle with hydraulic-pressure operated transfer clutch.
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