[특허]Hydraulic control device for multi-speed automatic transmission

Aisin Aw Co., Ltd.

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특허 상세정보

MyON담기

내보내기 페이스북 공유 트위터 공유 카카오톡 공유

Hydraulic control device for multi-speed automatic transmission

특허상세정보
국가/구분	United States(US) Patent 등록
국제특허분류(IPC7판)	F16H-061/26
미국특허분류(USC)	477/130; 477/160; 477/163; 477/164
출원번호	US-0561742 (2009-09-17)
등록번호	US-8210990 (2012-07-03)
우선권정보	JP-2008-255842 (2008-09-30)
발명자 / 주소	Yoshioka, Yuhei Noda, Kazuyuki Itazu, Naoki Nozaki, Yoshinobu
출원인 / 주소	Aisin Aw Co., Ltd.
대리인 / 주소	Sughrue Mion, PLLC
인용정보	피인용 횟수 : 4 인용 특허 : 1

초록
▼

A hydraulic control device for a multi-speed automatic transmission includes friction engagement elements, several hydraulic servos that engage and release the friction engagement elements, solenoid valves for engagement control, and a sorting switch valve that allocates engagement pressure from at least one of the solenoid valves for engagement control to two of the hydraulic servos. The sorting switch is switched between a first position that supplies engagement pressure to one of the two hydraulic servos in at least a Reverse, non-drive range and a specific Forward gear range, and a second position that supplies engagement pressure to the two hydraulic servos in other than the Forward range. The hydraulic control device supplies the engagement pressure to the two hydraulic servos when an all-solenoids-off failure occurs and the sorting switch is in the second position, and cuts off a source pressure to all solenoid valves when an all-solenoids-off failure occurs while the sorting switch valve is in the first position.

대표
청구항
▼

1. A hydraulic control device for a multi-speed automatic transmission, comprising: a plurality of friction engagement elements;a plurality of hydraulic servos that engages and releases the plurality of friction engagement elements;a plurality of solenoid valves for engagement control that is at least one less than the plurality of hydraulic servos;a sorting switch valve that allocates an engagement pressure from at least one of the plurality of solenoid valves for engagement control to two among the plurality of hydraulic servos,wherein the sorting switch valve takes a first position that supplies the engagement pressure to one of the two hydraulic servos in at least a reverse range, a non-drive range, and a specific gear speed of a forward range, and takes a second position supplies the engagement pressure to another of the two hydraulic servos in other than the forward range, andthe hydraulic control device achieves a first state that forms gear speeds using the solenoid valves for engagement control; a second state that supplies the engagement pressure to two among the plurality of hydraulic servos through two among the plurality of solenoid valves for engagement control when an all-solenoids-off failure occurs; and a third state that cuts off a source pressure to all the solenoid valves for engagement control when the all-solenoids-off failure occurs, whereina state variable oil passage that passes through the sorting switch valve and modifies the second state and the third state depending on a pressure output state,the second state is achieved when the all-solenoids-off failure occurs while the sorting switch valve is in a second position, and the third state is achieved when the all-solenoids-off failure occurs while the sorting switch valve is in a first position. 2. The hydraulic control device for a multi-speed automatic transmission according to claim 1, further comprising: a source pressure switch valve that switches between a supply position that supplies the source pressure to the plurality of solenoid valves for engagement control, and a reverse input position that inputs a reverse input pressure to exhaust ports of the two solenoid valves for engagement control through the sorting switch valve; anda signal pressure output solenoid valve that outputs a signal pressure, which switches the source pressure switch valve to the reverse input position when the all-solenoids-off failure occurs, whereinthe state variable oil passage is formed from a reverse input oil passage that passes through the sorting switch valve from the source pressure switch valve, and communicates the reverse input pressure to the exhaust ports of the two solenoid valves for engagement control, andthe sorting switch valve communicates with the reverse input oil passage when in the second position, and blocks the reverse input oil passage when in the first position. 3. The hydraulic control device for a multi-speed automatic transmission according to claim 1, further comprising: a source pressure switch valve that switches between a supply position that supplies the source pressure to the plurality of solenoid valves for engagement control, and a cut-off position that cuts off the source pressure; anda signal pressure output solenoid valve that outputs a signal pressure that switches the source pressure switch valve to the cut-off position when the all-solenoids-off failure occurs, whereinthe state variable oil passage is formed from a signal pressure passage that passes through the sorting switch valve from the signal pressure output solenoid valve and communicates the signal pressure to the source pressure switch valve, andthe sorting switch valve blocks the signal pressure oil passage when in the second position, and communicates with the signal pressure oil passage when in the first position. 4. The hydraulic control device for a multi-speed automatic transmission according to claim 2, wherein the sorting switch valve includes a biasing mechanism that biases a spool so as to take the first position; a forward engagement pressure input oil chamber that is input with the engagement pressure, which is supplied to the hydraulic servo of the friction engagement element that is engaged during forward travel, and switches the spool to the second position against the biasing force of the biasing mechanism; a second lock pressure input oil chamber that is input with a lock pressure when in the second position to lock the spool in the second position; and a lock release pressure input oil chamber that is input with a lock release pressure that returns the spool locked in the second position to the first position, whereinwhen the source pressure is stopped, the biasing force of the biasing mechanism returns the spool to the first position. 5. The hydraulic control device for a multi-speed automatic transmission according to claim 1, further comprising: a source pressure switch valve that switches between a supply position that supplies the source pressure to the plurality of solenoid valves for engagement control and a cut-off position that cuts off the source pressure, and has a first lock pressure input oil chamber that is input with a lock pressure to lock the source pressure switch valve to the supply position; anda signal pressure output solenoid valve that outputs a signal pressure, which switches the source pressure switch valve to the cut-off position when the all-solenoids-off failure occurs, whereinthe sorting switch valve has a second lock pressure input oil chamber that is input with the lock pressure when in the second position to lock the sorting switch valve in the second position,the state variable oil passage is formed from a lock pressure oil passage that communicates the lock pressure to the first lock pressure input oil chamber of the source pressure switch valve through the second lock pressure input oil chamber of the sorting switch valve, andthe sorting switch valve communicates with the lock pressure oil passage when in the second position, and blocks the lock pressure oil passage when in the first position. 6. The hydraulic control device for a multi-speed automatic transmission according to claim 5, wherein the sorting switch valve includes a biasing mechanism that biases a spool so as to take the first position; a forward engagement pressure input oil chamber that is input with the engagement pressure, which is supplied to the hydraulic servo of the friction engagement element that is engaged during forward travel, and switches the spool to the second position against the biasing force of the biasing mechanism; and a lock release pressure input oil chamber that is input with a lock release pressure that returns the spool locked in the second position to the first position, whereinwhen the source pressure is stopped, the biasing force of the biasing mechanism returns the spool to the first position. 7. The hydraulic control device for a multi-speed automatic transmission according to claim 4, further comprising: a parking switch valve that is switched between a parking state in which the source pressure is cut off from a parking cylinder in a park range of the non-drive range, and a parking release state in which the source pressure is supplied to the parking cylinder in other than the park range, and is held in the switched position;a non-release signal pressure output solenoid valve that outputs to the parking switch valve a switch signal pressure that switches the parking release state to the parking state; anda release signal pressure output solenoid valve that outputs to the parking switch valve a switch signal pressure that switches the parking state to the parking release state, whereinthe signal pressure of the release signal pressure output solenoid valve is also used in combination as the lock release pressure for the sorting switch valve.

이 특허에 인용된 특허 (1)

Gierer, Georg; Ruhringer, Uwe, Control device for an automatic automobile transmission.

이 특허를 인용한 특허 (4)

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Hydraulic control device for multi-speed automatic transmission

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이 특허에 인용된 특허 (1)

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Hydraulic control device for multi-speed automatic transmission

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이 특허에 인용된 특허 (1)

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IPC 상위 출원인

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IPC 상세정보(version : 201201)

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