That same lubricant also has to protect bearings and seals and resist degradation in the face of increasingly extended drain periods. It must also survive higher temperatures caused by reduced airflow due to improved vehicle aerodynamics and the increased energy density typical of modern, high performance powertrains.
Considering the long and hard life of synchronizers and their mechanical complexity, it becomes easier to understand the importance of using the correct fluid. Maintenance mistakes that shorten the life of a manual transmission include filling with engine oil or even automatic transmission fluid ATF.
Dedicated manual transmission fluids MTF offer far better protection against wear and pitting. They combine high temperature resistance with high levels of gear and bearing protection, and they are individually designed to adapt to the behaviors of various synchronizor materials.
Additive and viscosity modifier technology can be tailored during the design process to meet individual OEM specifications, so as to provide a fluid that functions as an integral component of the transmission. The trend is toward lower viscosity MTFs that reduce churning losses and improve fuel efficiency, without compromising protection. This is achieved through the use of robust additive and sophisticated viscosity modifier technologies. Using dedicated fluids has a major impact on the cost of equipment ownership, reducing service costs and fuel consumption, and delivering improved reliability.
And, from the drivability point of view, shift quality is also improved. Using a dedicated MTF to protect manual transmissions does not represent a significant additional cost compared to using an inappropriate fluid, but it does have major benefits for both owners and drivers. Sign Up Today. This site uses cookies to aid in navigation, analyze the use of our products and services, assist with our marketing efforts, and provide content from third parties. Privacy Policy. Accept Cookies. Contact Privacy Statement Terms of Use.
The Synchronized Manual Transmission-Defined. Related Posts. The ring has fine grooves or friction material on its inner cone that grip the gear and bring it to the same speed as the output shaft. It's made of a soft brass or copper material and has pointed teeth that align the sleeve with the dog teeth on the gear. This produces the desired gear ratio. Study Tips Feedback. Manual Transmission Synchronizers Many of today's cars and light trucks use synchromesh synchronized manual transmissions.
A significant of the feature of the invention is that its design facilitates and improves material utilization compared to traditional facing configurations and provides low cost for creating grooves in the material '.
It should be appreciated that the length L FIG. Advantageously, the grooves ' define an interrupted operating surface which tends to inhibit the formation of an undesirable hydro-dynamic oil film not shown which, in turn, facilitates providing a quick and smooth frictional engagement between the blocker 10' and a mating frictional member not shown.
Thus, when the features of this invention are used with a synchronizer ring 10 of the type shown and described, the invention has been found to facilitate providing a quick and low effort shift between gears of a transmission.
As alluded to earlier herein, the raised rib ' facilitates "cutting through" the hydrodynamic oil film during the engagement process. This acts as a seal to reduce or entirely eliminate the supply of oil at the frictional interface to aid in the elimination of oil supply moving centrifugally from the area 10a' to the area 10b' , thereby quickening the elimination of oil film in the area 10c'.
It has been found that the raised rib ' may be very economically produced by contouring the molding member or punch not shown which is used to force, densify and bond the material ' onto ring 10'. In this regard, the punch forces the material to densify during the bonding process from a nominal thickness of about 0.
A method for bonding material ' onto ring 10' will now be described relative to the schematic shown in FIG. The process begins at block ' wherein the adhesive 20' is applied to material '. At block ' the material ', which is in the generally rectangular and elongated form FIGS. At block ' FIG. At block ', the bonded punch not shown is used to force the material ' against wall 12' of ring 10'. As mentioned earlier herein, the bonded punch not shown may cause the rib ', chamfer ' or a series of alternating ribs ' and chamfers ' to be provided at the area 10a' FIGS.
Having shown and described the preferred embodiments of the present invention, wherein an inventive friction facing material, the method of making the friction facing material, and a friction element including the friction facing material thereon have been disclosed, it will be understood that further adaptations thereof may be accomplished by appropriate modifications by one of ordinary skill in the art without departing from the scope of the invention.
In particular, while the embodiments of the inventive friction facing material have been described herein as preferably including warp yarns weaving with a plurality of substantially linear fill yarns, the opposite thereof is also contemplated i. Further, the specific weaves and materials disclosed herein are also preferred embodiments, since the yarns may also be braided, but should not be deemed limiting on the intent of the resent invention.
It should also be appreciated that the invention could be applied to a wet or dry environment where the control of fluid flow is required, and the channels defined by the predetermined yarn arrangement may be used to channel heating or cooling fluids, including gases and liquids. All rights reserved. Login Sign up. Search Expert Search Quick Search. Synchronizer blocker rings used in manual transmissions.
United States Patent In accordance with one aspect of the present invention, a material for an element of a power transmission-absorption assembly and the method of making such material is disclosed. The material has a pre-selected channel configuration to permit flow of a cooling medium thereacross or therethrough. Another embodiment of the invention discloses a material and method for slotting the material and situating the material on a blocker ring to facilitate providing a plurality of spaced grooves having an open end which is substantially larger than a closed end.
The material may comprises a raised rib or chamfer which facilitates controlling the fluid at an area of engagement between the material and a mating frictional member not shown.
Nels, Terry E. Beavercreek, OH. Click for automatic bibliography generation. Select Powertrain Technologies Corp. Dayton, OH. Download PDF EP Fixture and method for bonding friction material. EP Frictional material. What is claimed is: 1. A friction lining material for use on a vehicle comprising: a material having a first edge and a second edge comprising a rib portion, said lining material comprising a plurality of apertures; and each of said plurality of apertures extending between said first edge and said rib portion a predetermined distance and defining a plurality of slots extending between said first edge and said rib portion, with each of said plurality of slots defining an open end associated with said first edge and a closed end associated with said second edge, said open end defining a first width and said closed end defining a second width, said first width being larger than said second width when said lining material is situated on a friction element.
The friction lining material as recited in claim 1 wherein said rib comprises a chamfer. The friction lining material as recited in claim 2 wherein said chamfer communicates with said plurality of slots.
The friction lining material as recited in claim 1 wherein said lining material comprises a paper material. The friction lining material as recited in claim 1 wherein said lining material comprises a woven material. A friction member comprising: a metal support ring; a friction lining material; an adhesive for securing said friction lining material onto said metal support ring; said friction lining material defining a frusto-conical shape having a first edge and a second edge, said lining material comprising a plurality of apertures; and each of said plurality of apertures comprising a predetermined length and defining a plurality of slots extending between said first edge and said rib portion, with each of said plurality of slots defining an open end associated with said first edge and a closed end associated with said second edge, said open end defining a first width and said closed end defining a second width, said first width being larger than said second width when said lining material is adhered to said a ring member.
The friction member as recited in claim 8 wherein said second edge comprises a rib. The friction member as recited in claim 8 wherein said second edge comprises a chamfer. The friction member as recited in claim 8 wherein said lining material defines a frusto-conical and partially interrupted bearing surface for engaging a mating member. The friction member as recited in claim 13 wherein said plurality of slots each comprise an imaginary centerline which intersect an axis of said metal support ring.
The friction member as recited in claim 13 wherein said second edge comprises a plurality of alternating chamfers and raised ribs. The friction member as recited in claim 8 wherein said friction lining material comprises either a composite or a paper material. The friction member as recited in claim 13 wherein said friction lining material comprises a woven material. A method for forming a friction member for use on a vehicle comprising the steps of: slotting a friction material to form spaced slots on a friction material having a open end associated with a first edge of said friction material and a closed end associated with a second edge of said material; forming said friction material into a frusto-conical shape such that an open end of each of said spaced slots is wider than a closed end of said spaced slots by a predetermined distance; and bonding said friction material onto a support ring.
The method as recited in claim 18 wherein said method further comprises the step of forming a raised rib associated with said second edge. The method as recited in claim 18 wherein said method further comprises the step of forming a raised rib associated with said second edge, said raised rib comprising a chamfer which communicates with said plurality of slots. The method as recited in claim 18 wherein said method further comprises the step of forming a chamfer associated with said second edge.
The method as recited in claim 18 wherein said method further comprises the step of providing a woven material as said friction material. The method as recited in claim 18 wherein said method further comprises the step of providing a paper composition material as said friction material. A friction lining material for use on a vehicle comprising: a material having a first edge and a second edge comprising a rib portion, said lining material comprising a plurality of apertures; and each of said plurality of apertures extending between said first edge and said rib portion a predetermined distance and defining a plurality of slots extending between said first edge and said rib portion, with each of said plurality of slots defining an open end associated with said first edge and a closed end associated with said second edge, said open end defining a first width and said closed end defining a second width, said first width being substantially the same as said second width when said lining material is situated on a friction element; wherein said rib comprises a chamfer.
A method for forming a fiction member for use on a vehicle comprising the steps of: slotting a friction material to form spaced slots on a friction material having an open end associated with a first edge of said friction material and a closed end associated with a second edge of said material; bonding said friction material onto a support ring; a width of said open end being substantially the same as a width of said closed end; wherein said method further comprises the step of forming a raised rib associated with said second edge.
A method for forming a fiction member for use on a vehicle comprising the steps of: slotting a friction material to form spaced slots on a friction material having an open end associated with a first edge of said friction material and a closed end associated with a second edge of said material; bonding said friction material onto a support ring; a width of said open end being substantially the same as a width of said closed end; wherein said method further comprises the step of forming a raised rib associated with said second edge, said raised rib comprising a chamfer which communicates with said plurality of slots.
A method for forming a fiction member for use on a vehicle comprising the steps of: slotting a friction material to form spaced slots on a friction material having an open end associated with a first edge of said friction material and a closed end associated with a second edge of said material; bonding said friction material onto a support ring; a width of said open end being substantially the same as a width of said closed end; wherein said method further comprises the step of forming a chamfer associated with said second edge.
Field of the Invention The present invention relates to a fabric arrangement and method for controlling fluid flow and, more particularly, to a fabric arrangement and method for controlling fluid flow which may be utilized with friction elements. Description of Related Art In clutches, brakes, automatic transmissions, limited slip differentials, hoists and similar friction power transmission and energy absorption devices, there is generally provided one or more sets of cooperating members, in which one of the cooperating members drives the other.
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