Hydraulic control system for 4-speed automatic transmission
원문보기
IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
|
출원번호 |
US-0375364
(1999-08-17)
|
우선권정보 |
KR0004782 (1999-02-11) |
발명자
/ 주소 |
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출원인 / 주소 |
- Hyundai Motor Company, KRX
|
대리인 / 주소 |
Birch, Stewart, Kolasch & Birch, LLP
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인용정보 |
피인용 횟수 :
7 인용 특허 :
3 |
초록
▼
A hydraulic control system for 4-speed automatic transmissions in which line pressure, drive pressure, reverse pressure and low pressure are selectively supplied from a manual valve to an underdrive clutch, an overdrive clutch, a low-reverse brake, a reverse clutch, and a second brake to realize fou
A hydraulic control system for 4-speed automatic transmissions in which line pressure, drive pressure, reverse pressure and low pressure are selectively supplied from a manual valve to an underdrive clutch, an overdrive clutch, a low-reverse brake, a reverse clutch, and a second brake to realize four forward speeds and a reverse speed. The hydraulic control system includes an underdrive pressure control valve provided between a drive pressure line and the underdrive clutch, and controlled by a first solenoid valve; an overdrive pressure control valve provided between the drive pressure line and the overdrive clutch, and controlled by a second solenoid valve; a second/low-reverse pressure control valve connected to a line pressure line and controlled by a third solenoid valve; a solenoid switch valve controlled by low pressure, line pressure or drive pressure supplied respectively from a low pressure line, the line pressure line and the drive pressure line, and which supplies hydraulic pressure to the low-reverse brake and the second brake; and a fail-safe valve provided between the solenoid switch valve and the second/low-reverse pressure control valve, and is controlled by operational pressure of the underdrive clutch and overdrive clutch, line pressure, and drive or reverse pressure, the fail-safe valve preventing hydraulic pressure supplied from the second/low-reverse pressure control valve from being simultaneously supplied to the second brake and the low reverse brake. The reverse clutch is directly communicated with the manual valve via a reverse pressure line.
대표청구항
▼
[What is claimed is:] [1.]an underdrive pressure control valve provided between a drive pressure line, connected to the manual valve, and the underdrive clutch, and controlled by a first solenoid valve;an overdrive pressure control valve provided between the drive pressure line and the overdrive clu
[What is claimed is:] [1.]an underdrive pressure control valve provided between a drive pressure line, connected to the manual valve, and the underdrive clutch, and controlled by a first solenoid valve;an overdrive pressure control valve provided between the drive pressure line and the overdrive clutch, and controlled by a second solenoid valve;a second/low-reverse pressure control valve connected to a line pressure line, connected to the manual valve, and controlled by a third solenoid valve;a solenoid switch valve controlled by low pressure, line pressure or drive pressure supplied respectively from a low pressure line, the line pressure line and the drive pressure line connected to the manual valve, and which supplies hydraulic pressure passed through the second/low-reverse pressure control valve to the low-reverse brake and the second brake; anda fail-safe valve provided between the solenoid switch valve and the second/low-reverse pressure control valve, and is controlled by operational pressure of the underdrive clutch and overdrive clutch, line pressure, and drive or reverse pressure, the fail-safe valve preventing hydraulic pressure supplied from the second/low-reverse pressure control valve from being simultaneously supplied to the second brake and the low reverse brake,wherein the reverse clutch is directly communicated with the manual valve via a reverse pressure line.
이 특허에 인용된 특허 (3)
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Sakai Hiromasa (Kanagawa JPX) Oshidari Toshikazu (Kanagawa JPX), Hydraulic control system for automatic transmission.
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Sakaguchi Shinya,JPX ; Takagi Akira,JPX, Hydraulic pressure control apparatus for an automatic transmission.
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Tsutsui Teiji (Himeji JPX) Watanabe Sinji (Amagasaki JPX), Vehicle automatic transmission with valve duty factor control.
이 특허를 인용한 특허 (7)
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Kaizu, Kenichi, Control device for automatic transmission.
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Gierer, Georg; Schmidt, Thilo, Gear control device.
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Chang-Wook Lee KR; Jong-Sool Park KR; Jae-Ho Cho KR; Jae-Duk Jang KR; Tae-Kyun Kim KR; Jin-Hee Lee KR, Hydraulic control system for automatic transmission.
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Ishii, Shigeru; Sugiuchi, Masashi, Hydraulic pressure control method and apparatus of an automatic transmission for a vehicle.
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Tae-Kyun Kim KR; Jae-Duk Jang KR; Jong-Sool Park KR; Hyun-Soo Shim KR; Jin-Hee Lee KR; Chang-Wook Lee KR, Line pressure control system of automatic transmission.
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Tae-Kyun Kim KR; Jae-Duk Jang KR; Jong-Sool Park KR; Hyun-Soo Shim KR; Jin-Hee Lee KR; Chang-Wook Lee KR, Manual valve of hydraulic pressure control system for automatic transmission.
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Miller, Jeffrey David; Fleischmann, Steve Gary; French, Timothy Bernard, Transmission shift system.
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