DE1912276A1 - Device for controlling the amount of pressurized oil flow to a pressurized oil-actuated friction clutch in transmission devices - Google Patents

Description

HÜHDA GIKEN KOGYO KABUSHIKI KAISHA,
5, 5-chome, Yaesu, Chuo-ku,

Tokyo / Japan

Patent registration

Device for controlling the amount of Druoköl influx to a pressure oil-operated friction clutch in transmission

supply devices

It is known that in the transmission device of a motor vehicle or the like. A friction clutch is actuated by the supply of pressurized oil, thus resulting in a predetermined speed ratio aes transmission system is determined. It was so far It is common in these devices that the supply of pressurized oil to the friction clutch at an almost constant rate takes place «If the supply speed of the pressure oil is relatively high, the frictional contact is violent and a shock can thereby occur in the transmission system. On the other hand, when the supply speed of the pressure oil is proportionate is low, the impact that occurs is only weak, but a longer period required, which delays the switching process will.

The invention has set itself the task of providing such a transfer

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to make carrying device so that they do not have this defect to achieve this, the invention proposes the Installation of a control slide, which controls the flow of pressurized oil to the clutch coupling so that the pressurized oil is initially relatively high is strong and then decreases

A particular embodiment of the invention is characterized in that that the control slide is switched into the pressure oil supply line leading from a pressure oil source to the friction clutch is and by a first pressurized-oil-operated apparatus m direction to its locking position and a second pressurized-oil-operated The device is sealed against its open position is and that the two pressurized oil-operated apparatus with the outlet opening of the control valve housing through a first and a second connecting line are connected, the second-mentioned connecting line having a greater flow resistance than the first-mentioned connecting line »

Another proposal of the invention is that the capacity aer the pressure oil chamber of the second pressure oil-actuated Apparatus is larger than that of the first pressurized oil-operated apparatus

In the following an embodiment of the invention is under Described in more detail with reference to the drawing. They represent:

Fig. 1 is a diagram in an embodiment of the invention,

Pig. Fig. 2 is an explanatory diagram of the effectiveness of this embodiment Magramm,

With 1 a Jieibungskuppiung is designated, aie by pressure oil is operated. A transmission device, not shown, is designed so that a transmission system for the first ü-speed, which has a free had (not shown) and a transmission system for a second, higher speed can optionally be switched on in their respective working position when the clutch 1 is either off or is indented. A slide control 8 consists of - 3 -

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a cylindrical housing 6 and a piston-shaped one sliding therein Control slide 7. The inlet opening 4 and the outlet opening 5 of the slide housing 6 are located in a friction clutch 1 with a pressurized oil supply line 3 connecting a pressurized oil source 2. The valve housing 6 contains the control valve 7 at its one end, i.e. at its left end according to the drawing, and is slightly in diameter at its other end expanded and there comprises a control piston 9 with a matching, larger diameter. Between the control slide 7 and the control piston 9 is a spring 10 so that normally the control slide 7 is on the left in its open position, in which the inlet port 4 is fully open. At the left end of the filter housing 6 is located between its left inner end wall and the control slide 7 a free space Vi and at the right end of the valve housing is located between it right inner end wall and the control piston 9 a free seam 12. The two free spaces 11 and 12 are with the outlet opening. tion 5 of the slide control 8 through a first connection line 13 and a second connecting line 14 are connected, so that these spaces have a first and a second oil chamber 11 and 12,: .- 4ar: put-. The first pressure oil chamber 11 forms in cooperation with the control slide 7 a first pressurized oil-operated apparatus 15 consisting of a pressure piston and a cylinder m-.Apjpar, at pressure oil supplied, the control slide 7 according to der: Drawing. to the right in the direction of its locking position pushed. The second pressure oil chamber 12, in cooperation with the control piston 9, forms a second pressure oil-actuated Pressure piston and cylinder existing apparatus 16. If this apparatus is supplied with pressure oil, the piston 9 is shown in the drawing pushed to the left. This compresses the spring 10 and thereby increases its force until the Control slide 7 is moved to the left into its open position. Because the diameter of the piston and cylinder of the second pressurized oil-actuated Apparatus 16 is larger than the diameter of the piston and cylinder of the first oil operated apparatus 15 » exceeds the force to close the control slide 7 through

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the apparatus 16 the liraf t to open the control slide "- ¹ F * '''-^" ⁷ through the apparatus 15. -But since the capacity of the pressure oil chamber 12 is greater, the air is. of the apparatus 16 is delayed when the return oil flow rate is not "particularly""increased." ■ ■ - ^; '- ■ "■"' ■ "'""-' ^r '■''''- ^: "''■"." - "

The second connecting line 14 has a constriction 17 in its center, so that its flow resistance, compared with that of the first connecting line T3, is increased. As a result, the pressure oil supply to the second "pressure oil" chamber 12 is slowed down. " ^:

In the illustrated embodiment, a 'first return oil source 18 for generating an oil pressure corresponding to the engine power and a second control pressure oil source for generating one of the rotational speed of the anirri-ebs -'-' shaft of the - Transmission device corresponding oil pressure '; · - "provided. With uiesen oeiden Druckölquellem- 18' and '19 -are' the Deiden -ünd a Druckäifferenzschieber.s 20 connected,;. '. ^ E2? -'- ^: ~ in the pressure oil supply line 3 is switched on. Di; @s has "- z ^: ur ^: - ^: Polge that the friction clutch 1- is thereby optionally disengaged, depending on whether it depends on <iem" between the iuasohinenxeistung and the ueschwinaigk-ei't ■■ aes' liraf twagens- automatically either with the- pressure oil source · 2 ^: '- ^v ' ■ or connected with the outside air. This ^: leads to a 'atitö'-maiisciien switching of the speed ratio. In the embodiment shown, there is also a second Dungs clip. .- ■ - arrangement 21 provided by the effectiveness of "a second pressure difference ^ slide valve 22 switched on in the pressure oil supply line 3 for the purpose of engaging a third gear optionally together with the first, wedge clutch. - X with the pressure oil - ^: · - 'Source 2 can be connected .: .- ·, - .:. - ·' .-.. "- '. ::' ■ :. ■ ·. - /

The. with the zv / eite pressure difference.enzs.chiebers- 22isind. · -'- ■ with, the first or second tax return oil source 18 or »-, 19: in; - 'almost, the same way as over the first .Druckdifierenzsöhi.eber .- / 20

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BATH ORIGINAL

connected so that it automatically passes through, the pressure difference between these two control pressure & oil wells is controlled. But the two pressure differential slides 20 and 22 are in the Drawing on the left drawn, connected to the second control pressure oil source 19 pressure receiving surfaces different from one another, so ° that they are at different ü-eschätze of the motor vehicle be operated. Furthermore, the second friction clutch 21 is on its pressure oil supply side with a second Slide control 23 is connected, which is similar to the slide control 8 described above and in a similar manner. Way controlled will.

The method of operation of the device according to the invention is described below shown:

If, based on the in aer]? Ig. 1 position shown, the first differential pressure slide 20 to the right oewegt and so the uruckölzuführleitung 3 is opened, first flows a lot of pressure oil from the pressure oil source 2 through the -vuii opened slide control 8 to the friction clutch .1, in which a piston 1 a is moved forward through a gap peculiar to these clutches; oil from the outlet opening 5 of the slide control 8 through the .Connection lines 13 and 14 in the first and second pressure oil-operated Apparatus 15 and 16. This has the consequence that the control slide 7 is actuated by the first-mentioned pressure oil Apparatus 15 in the direction of its closed position and through the second-mentioned pressurized oil-operated apparatus 16 into its open position is moved. Now the effectiveness of the second-mentioned apparatus is due to the increase in the flow resistance of the: connecting line 14 through the constriction 17 and because of the large Capacity of the associated pressure oil chamber 12 ver; slow. Accordingly, the spool 7 is first by the The first-mentioned pressurized oil-operated apparatus 15 shifted towards the closed position, so that the flow of pressurized oil to the friction clutch 1 is significantly reduced '. Then the control slide 7

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by the second-mentioned pressurized oil-operated apparatus 16 to the open position shifted towards so that the flow of pressure oil to the friction clutch 1 is gradually increased «These flow conditions are represented by curve A of FIG. In this figure, the ordinate shows the amount of pressure oil supplied or the oil pressure is plotted, while the abscissa values reflect the time of the switching process. The intersection of the abscissa axis with the urinary data axis indicates the beginning of the pressure oil supply, the intersection of the abscissa axis with the left, vertical dashed line gives the time of the start and the Point of intersection of the Ibscissa axis with the one further to the right, The vertical dashed line indicates the point in time at which the switch-on process was completed. Curve B of FIG. 2 relates to Usual design with a constant pressure oil supply »

The main feature of the invention is the pressurized oil supply flow to the friction clutch initially large and then decreases, so that the flow characteristic follows curve A of FIG. The comparison with that usual procedures represented by curve B of the same figure not only shows a reduction in the time for the holding process according to the invention, but also that the upward Inclination of the curve A where the frictional engagement essentially takes place, is relatively small, so that there a relief of the pressure is brought about, which could occur at the time of the surgery.

Expectations;

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Claims (1)

' Ans ρ r -ü c Ii e - - ^; ■ - ■ - ■■■■■ ■■ - ■ - ■ - '■■ - (1. Apparatus for controlling uei Bruekölzuflußmenge a ^ - ■ / pressure oil-operated K ei bung 3 clutch in ubertragun-svarrich- obligations ", characterized by a control slide ^(7), which the Drucköxzufluß to the iteibun ^ skuppiung (1, 21st } · Controls so that -the pressurized oil flow is initially proportional to the ratio and then decreases. " .... · .- 2. Device iiach claim 1, characterized in that the control slide '(7)' is switched on in ale of a Uruckölquelle (2) to the Reibungskuppxung (ι, '21) fünrende urucköizufünrleitung (3) and through a first pressure oil-actuated apparatus (15) in liichtung to its Ver »3chi.ußlage and a second urückÖlDetati]: (16) Len Apparat- · ^■: is shifted in Hichtung to its uffnungslage and that the pressure oeiden oil-operated apparatus (15, 16) with α he jiuslaß opening ( 5) of the valve valve housing (6) are connected by a first and a second connecting line (13 or 14), v; although the central connecting line (14) has a greater flow resistance than the first-mentioned connection; line (13) - ο device according to aen claims 1 and 2, üaüuroh characterized, that the absorption capacity of the Uruckölaminer des z-.eiten pressure-oil-operated apparatus (16) is larger than aie of the first pressurized oil actuating apparatus (15) ο The patent attorney 9 09 8 /, 1/0 9 U Empty soap