-
公开(公告)号：EP0414826A1
公开(公告)日：1991-03-06
申请号：EP89911151.0
申请日：1989-05-09
申请人： CATERPILLAR INC.
发明人： LORIMOR, Larry, W.
CPC分类号： F16D48/0206 , F16D2048/0209 , F16D2048/0224 , F16D2048/0281
摘要： Les systèmes de fluide commandant l'embrayage d'un train d'entraînement de véhicule, comprennent normalement des soupapes de surpression de modulation, destinées à faciliter l'embrayage. On cherche, dans lesdits systèmes, à assurer que la pression du système est réduite pendant un changement, de sorte que le piston de charge de la soupape de surpression de modulation, soit entièrement remis à l'état initial avant l'embrayage du train d'entraînement du véhicule. Dans cet agencement, on a prévu un système de fluide (10) comportant une pluralité d'embrayages (12, 14, 16). Afin d'assurer que le système de charge est entièrement remis à l'état initial, un mécanisme de commande (110) de remise à l'état initial dudit piston de charge établit un chemin permettant de purger le fluide sous pression provenant d'une chambre de pression (80) dudit piston de charge d'une soupape de sûreté (54) à pression de modulation en réponse à la pression du fluide située dans un desdits embrayages (16), se trouvant en dessous d'un niveau de pression prédéterminé.
-
公开(公告)号：EP0338018A1
公开(公告)日：1989-10-25
申请号：EP88900649.0
申请日：1987-12-17
申请人： CATERPILLAR INC.
CPC分类号： F16F15/163 , F16D3/06 , Y10T403/255 , Y10T403/7028
摘要： A lubricated spline joint (30) for providing a viscous damping function includes a first member (32) defining an in ternal spline (62), a second member (34) defining an external spline (64) engaged therewith, a seal ring (76) between the members (32, 34) at one end of the splines, and a radially inwardly facing chamber (80) at the other end which is exposed to lubrication fluid. The improvement features an internal barrier (84) for assuring a fixed internal radius R and thus a preselected centrifugal pressure head of the fluid mass (86) in the chamber (80) and about the splines, and a plurality of venting passages (94) located radially outwardly of the radius R for continually exhausting fluid from the splines as a re sult of centrifugal force so that fresh and/or less aerated fluid is circulated through the splines.
-
公开(公告)号：EP0414826B1
公开(公告)日：1993-09-15
申请号：EP89911151.2
申请日：1989-05-09
申请人： CATERPILLAR INC.
发明人： LORIMOR, Larry, W.
CPC分类号： F16D48/0206 , F16D2048/0209 , F16D2048/0224 , F16D2048/0281
摘要： Fluid systems for controlling clutch engagement of a vehicle drive train normally have modulating pressure relief valves to aid in smooth clutch engagement. It is desired in such systems to ensure that the system pressure is reduced during a shift so that the load piston of the modulating pressure relief valve is fully reset prior to engagement of the vehicle drive train. In this arrangement, a fluid system (10) is provided which has a plurality of clutches (12, 14, 16). In order to ensure that the load system is fully reset, a load piston reset control mechanism (110) is provided which establishes a path to vent the pressurized fluid from a load piston pressure chamber (80) of a modulating pressure relief valve (54) in response to the pressure of the fluid in one of the clutches (16) being below a predetermined pressure level.
-
公开(公告)号：EP0338018B1
公开(公告)日：1993-08-11
申请号：EP88900649.0
申请日：1987-12-17
申请人： CATERPILLAR INC.
CPC分类号： F16F15/163 , F16D3/06 , Y10T403/255 , Y10T403/7028
摘要： A lubricated spline joint (30) for providing a viscous damping function includes a first member (32) defining an internal spline (62), a second member (34) defining an external spline (64) engaged therewith, a seal ring (76) between the members (32, 34) at one end of the splines, and a radially inwardly facing chamber (80) at the other end which is exposed to lubrication fluid. The improvement features an internal barrier (84) for assuring a fixed internal radius R and thus a preselected centrifugal pressure head of the fluid mass (86) in the chamber (80) and about the splines, and a plurality of venting passages (94) located radially outwardly of the radius R for continually exhausting fluid from the splines as a result of centrifugal force so that fresh and/or less aerated fluid is circulated through the splines.
-
-
-
搜索结果
4 条记录 (耗时 0.009 秒)
