Vehicle transmission and method for its operation
원문보기
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
F16H-061/00
F16H-057/04
F16H-061/686
출원번호
US-0270472
(2014-05-06)
등록번호
US-9631719
(2017-04-25)
우선권정보
DE-10 2013 212 428 (2013-06-27)
발명자
/ 주소
Brushkivskyy, Vyacheslav
Lutz, Bernd
출원인 / 주소
ZF Friedrichshafen AG
대리인 / 주소
Davis & Bujold PLLC
인용정보
피인용 횟수 :
0인용 특허 :
29
초록▼
A transmission having a plurality of shifting elements which are selectively engaged and disengaged when a gearshift is carried out, and a plurality of gearsets which, depending on the shifting position of the shifting elements produce a defined transmission ratio, and a shifting oil system which su
A transmission having a plurality of shifting elements which are selectively engaged and disengaged when a gearshift is carried out, and a plurality of gearsets which, depending on the shifting position of the shifting elements produce a defined transmission ratio, and a shifting oil system which supplies the shifting elements with oil in order to operate them and a cooling and lubricating oil system which supplies assemblies of the transmission with oil for cooling and/or lubricating. From the shifting oil provided by the shifting oil system, a partial stream of oil can be tapped off for cooling and/or lubricating the shifting elements, such that a quantity of cooling and lubricating oil that is or can be supplied by the cooling and lubricating oil system can be reduced to the quantity required for cooling and/or lubricating those assemblies of the transmission which do not contain the shifting elements.
대표청구항▼
1. A transmission of a motor vehicle comprising: a plurality of shifting elements (A, B, C, D, E) which are selectively engaged and disengaged when a gearshift is carried out,a plurality of gearsets (11, 12, 13, 14) for producing, depending on a shifting position of the shifting elements and hence d
1. A transmission of a motor vehicle comprising: a plurality of shifting elements (A, B, C, D, E) which are selectively engaged and disengaged when a gearshift is carried out,a plurality of gearsets (11, 12, 13, 14) for producing, depending on a shifting position of the shifting elements and hence depending on a gear engaged, a defined transmission ratio,a shifting oil system (15) for supplying the shifting elements with shifting oil in order to operate the shifting elements, the shifting oil system having a central shifting oil line and a plurality of shifting oil supply lines, and each of the shifting oil supply lines communicates with the central shifting oil line and a respective one of the plurality of shifting elements such that a flow of shifting oil is deliverable to each of the shifting elements via a respective one of the plurality of shifting oil supply lines, anda cooling and lubricating oil system for supplying assemblies of the transmission with cooling and lubricating oil for at least one of cooling and lubricating the assemblies of the transmission,a tap is arranged in each of the shifting oil supply lines such that a partial stream of shifting oil is divertable, via the tap, from the flow of shifting oil to the respective shifting element for at least one of cooling and lubricating the shifting elements (A, B, C, D, E) such that a quantity of the cooling and lubricating oil, that is supplied by the cooling and lubricating oil system is reducible to a quantity required for the at least one of cooling and lubricating the assemblies of the transmission which do not contain the shifting elements (A, B, C, D, E). 2. The transmission according to claim 1, wherein the shifting oil system (15) comprises a control valve (17) for each of the plurality of shifting elements (A, B, C, D, E) by which the flow of shifting oil supplied, as necessary, to the associated shifting element, and the partial stream of shifting oil, used for the at least one of cooling and lubricating the associated shifting element, is tapped off from the flow of shifting oil to be supplied to the associated shifting element downstream of the respective control valve (17). 3. The transmission according to claim 2, wherein the partial shifting oil stream, used for the at least one of cooling and lubricating, is tapped off from the shifting oil to be supplied to the shifting element concerned upstream of either a shifting piston (22) or a shifting oil pressure chamber (33) of the shifting element concerned (A, B, C, D, E). 4. The transmission according to claim 2, wherein the partial shifting oil stream, used for the at least one of cooling and lubricating, is tapped off from the shifting oil to be supplied to the shifting element concerned in an area of either a shifting piston (22) or a shifting oil pressure chamber (33) of the shifting element concerned (A, B, C, D, E). 5. The transmission according to claim 1, wherein, for each of the shifting elements (A, B, C, D, E), the shifting oil system (15) comprises first and second control valves (17, 32) connected in parallel with one another, the first control valve (17) supplies, from the shifting oil system, the shifting oil required for operating the shifting element concerned, and the second control valve (32) supplies, from the shifting oil system, the partial shifting oil stream required for the at least one of cooling and lubricating the shifting element concerned. 6. The transmission according to claim 1, wherein the partial stream of shifting oil used for the at least one of cooling and lubricating the associated shifting element (A, B, C, D, E) is tapped off from the flow of shifting oil at least during a shifting process of the associated shifting element. 7. The transmission according to claim 6, wherein the partial shifting oil stream used for the at least one of cooling and lubricating the shifting element (A, B, C, D, E) concerned is tapped off from the shifting oil after the shifting process of the shifting element. 8. The transmission according to claim 1, wherein the transmission further comprises a rotation element for uniform distribution of the partial stream tapped off from the shifting oil.
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