WO2014071936A1 - Hydraulic housing of an electrohydraulic valve actuating mechanism - Google Patents

Abstract

A hydraulic unit for an internal combustion engine is proposed - having an electrohydraulic valve actuating mechanism, comprising - a hydraulic housing (2) with a receiving opening (33), - a piston guide (32) which is caulked with the receiving opening, and a pump piston (8) which is guided longitudinally movably therein, - and a cam follower which is configured as a tappet for transmitting a cam elevation to the pump piston. The tappet is to be configured as a bucket tappet (23, 23') with a cam tapping surface and a bucket skirt (24) which is guided longitudinally movably in a tappet guide (25) of the hydraulic housing.

Description

 Hy $ mufikg * a.ys mmr ^ in m i hm Var ftft uerwng

The invention relates to a hydraufeinheif for a Bfennkraffmaschine with eiekt-> fohydraullseher valve control. The hyalocele urnfasat

a Hydraullkge Äyse with a Äufnahmeöffnyng,

 one with the Äufnabmeöffnung versten mfe olbeniyhryng and a longitudinally wegheweglich led Pompenkolben,

·· - and one: as shocks! trained Nöckenfelger transfer of a resettlement to the Fumpenkol.

Behind the rim of the inventions

Brennkraftmasenioeo with eleikfrQhydradischer yentilsteueryng _s at de the essential, for the hydraulic transmission of geberseiigen Noekenerheböf - are in a vermontlerten and the Z iinderkopf fortified H dra likeinhelt arranged nth gen ayl the contractor side Gasweehselyentile required Compon, part of the prior art and the Äutomohil FIAT under the name ^' ultialr in mass production, essential part of the philosophy in hydraulics is in Hydraylikgehausej as is apparent inter alia from DE 18 2ÖÖ8 OOS 076 A. The Keifoen guide, which stores the sorbent pump cooktop, is screwed into the hydraylic housing there

Alternatively to this, oh oh. febef s "og. ^" should be added to the oil-bearing ring with the Hydrayl khusius by means of a series of hexachloro-oxygenation.

In DE ^'10 2010 021 304 Ä.1 it is suggested ights di Ikel en öhrung and Hydraylikgehäuse by plastic ateriaiumforn yng -to. The existing relatively resistant steel material Kelbenföhrung is in the Aufnahmeöf ~ voltage of relatively wherein: Alumlnlum erketcff existing Hydraullkgetiäu-: ses elngepresst un "read locally significantly ^Übermal" the olhenfyhrung causes Wefkstofffileßen of Hydraulikge ayse ^ in ayßere lngnyten the Kclhenfuhryng, This non Ersförongsfrei releasable Formschiussverbindung is from the literature Also known as self-stemming. In the cited document, however, the joining process is referred to as clinching, presumably in reference to the duro-joints of 8tesh workpieces, which are to be understood under this name.

According to the latter document, it is known to the applicant that the transmission of the cam lobe on the follicle can be done by means of a pawl or a pusher as well as a ram.

Aufg e of the invention ng

der Erfindung Object of the invention Is to develop a Hvdraulikeinheif of the aforementioned type constructively with a StöEet as Nockenfölger.

the invention

The solution to this problem results from the fact that the pestle is designed as a cup-tappet with a nude-tapping surface and a cup-hiddle, which is initially guided in a tappet guide of the Hydrayi-gorgius

Preferred methods of administration and of the dependent claim, and the claims of the claimant

Further features of the invention will become apparent from the following description and from the drawings, in which iwei Ausführiggsbeisplefe the invention daraesfellf. Unless otherwise stated, the same or fynktl- önsejelche features or components are provided with the same Sezugszahlen. Show it:

Figure 1 is a known Hydraufikeinhelf a elektrohydraulisehen valve control in perspective view; FIG. 2 shows a hydraulic circuit through the hydraulic unit along a motor vehicle.

3 h the Rydraylikelhelf along a mors-

FIG. 4 is a cross-sectional view of the hydrotubing inlet along a hydrofluidic vessel mounted therein; Figure 5 shows the cross section according to Figure 2 with the harvesting Ausfübrungsbelspiel a invention ungsgernaßen encoder unit;

FIG. 6 shows the cross section according to FIG. 2 with the second audible signal of a transmitter unit according to the invention:

Figure? the evolution between the hydration chamber and the columnar foot in an enlarged position,

Thank you very much for the eicbn ngei

Figure 1 shows the overall view of a known Hydraulikeinhelf 1, which is ready for installation in a 2-cylinder head a four-cylinder in-line engine with electro-hydraulic valve control is ready pre-assembled. In, a: at the n n oil circuit of the internal combustion engine: connected Hydra ufikgehause: 2 are picked up by the cams of a camshaft, not shown Öebereinheiten 3 received. On the side opposite the walking units long side of the H draulikgehauses electromagnetic Hydraulikverstile 4 can be seen.

in das Hydrau^¬ likgehäuse eingeschraubter Sensor 13 dient zur Erlassung der Fl öraüiikmiitel- temperatut. A quemel joins one of the hayglelehen G © r @ inh i | n 3 is shown in FIG. The Geoeinhelt includes as a cam follower on a rigid Abyföelement S articulated Schiepphehel 8 with a needle-bearing roller 7 as Nookenabgrl fifliche and a spring-loaded F m ^ nkol ^ 8, on which the cam lobe is transmitted and a velumenverände io en Pressure chamber 9 limited!;. In order to control the Hdl kmifteidryoke dissolving in the drip chamber in the range of 200 bar plus pressure peaks of the pressurized impurities, the dM ^' rssf. For this reason, the covered lid took away 10 sealed Hydraujlkgehius 2 as pressure-tight aluminum forged! executed. When geöff net Nydraülikventll 4 s de pressure chamber with ei em pressure relief chamber 11 connected, in turn, by a spring-loaded piston 12 of a pressure accumulator

in the Hydrau ^¬ likgehäuse screwed sensor 13 öraüiikmiitel- temperatut serves to remission of Fl.

FIG. 3 shows an ehms ready 14 for actuating a gas eebselyeutile of the internal combustion engine, which is connected to the pump piston 8 of the governor unit 3 above ducts 15 according to FIGS. 2 and 18 according to FIG. 3 in hydraulic VVFRK connection. Oils e mereinr esf includes a irsgehäusgehäuses the Hydraulikgehiyse 2 screwed 1? ₅ a hermetic piston 18 mounted between the: Nehrner-Felben and the alternating valve and a hydrau- lic valve brake 20, which ensures a defined deceleration and gentle closing during the stroke phase of When the hydraulic cam valve 4 is opened hydraulically, a rapid outflow of hydraulic fluid occurs as follows: the pressure chamber into the strain relief space 1 1 (see FIG. 2), the separation of the pressure chamber 9 from Druckhastungsraum 1 through the H d ~ raullkventil 4 goes from the cross-section shown in Figure 4 along the Hyth raulikyentifs ervor. The channels 15 (s, Figure 2). and 10 (see Figure 3) are hydraulically connected to one another via a lifting groove 21 running on the drainage valve, so that the annular groove as well as the channels 15 and 15 are part of the drive (s _> Figure 2), in the opened state the hydraulic valve is open an overflow of H draulikmiriel from the pressure chamber in the Druc entlastuogsraum and back to: Ober a the Druckenttastyngsraum with the annular groove connecting hole 22 u. Segenüfoer the well-known Röllensebfef3pbebel 6 aemiS Figure 2 is now the Nockenfeiger erfindungsgeniaß as TassenstüSe! 23 or 23 ^! gemii the figures 5 z. 6 trained and led with a cup shirt 2 in a Stölelföbryng 25 of Hydrayllkgehauses 2 along a egüeb,

In the TassenstöSel 23 with Gleifahg ff gives the cup shirt 2 mn a cup bottom 26, the outside of which forms the Noekenahghffsf surface and the inside of a bottom 27 of Ryn penkolheos 8 actuated For Druok- ausgieiob the Stögelinneren the cup bottom: 28 of white openings 28 passes As an alternative to the illustrated flat cup bottom, it can also be arched in a cylindrical neck in order to be able to reduce the emigration of the vertical contact sphincter and, consequently, the sfd eidufchrnesser. Differently than shown, the cup would be secured against twisting in the Stöielföbrong 25 in this case,

With the bucket 23 ^! Is the ockenabgriffsfliehe a low-friction needle-bearing (alternatively: sliding bearing) cckenrole 7 di axle cupsheid 24, the operation of Pumpenfco! Oens 8 you raw an intermediate bottoms 29 with a cup shirt 24 radially superior pre tion 30 of the TassenstöSe in a longitudinal groove 31 of Stoi fubrung 26 against twisting seven.

In the known encoder unit in Figure 2 tsi. The pump piston 8 is located slowly in a piston chamber 32, which is buried in the hydraylic zone 2. In order to avoid the associated files and risks of this kind of fastening in view of premature loosening of the bushing In the figures 5 to 7 illustrated self-restraint of the oibenföbrung Replaced in Hy Jraulikgehäuse. In this joining process, which is known by the method of sieving, the two partners to be joined consist of materials of differing strength, namely the Kelben leadership of steel and the Hull of aluminum, as it is from the enlarged view in FIG. becomes clear, the H draufikgehiuse has a: stepped in diameter receiving opening 33 for also styled in Byrchmesser on top of it. In the process, the diameter overlaps so much locally in front of the joining projec- tion that when the Kelhenfübrung is pressed into the recess the soft fluid of the hydrofluidic cage flows into external annular grooves 34 and 35 of the Kolhenfehfimg and this is permanently attached in the hydraulic gel groove.

As can also be seen in FIGS. 5 and 8 ^' , the Kelhen guide 32 faces the opening 33 of the opening 33 and, together with the stop guide 2 $, defines an annular space; 38, into which the cam skirt 24 following the cam lift dips in. The return spring 3 loading the pyrnene piston 8? is located within the pump piston and the RotbenfdbryHg and is based on the one hand on the open bottom 38 of the piston guide and the other hand on the closed bottom 27 of the Pompenkolbens, By this arrangement and by opposite to Figure 2 contrary efe orientation de open soap of hohfeyll döschen P mpenkölbens to Druekraum 9 bn, the spring length can be rnaxlmierten in favor of an improved spring characteristic,

Ais Foreign stroke limitation of the pump piston B opposite the olbenföh- tion 32 a Sicberongsrin 39 is used, against which a Durchmesserstyfe 40 of the pump piston starts (see Figure 7% if it is not by means of the Tassenstö- trade 23 or ^23! Mm cam is supported. Also provided, but shown in the figure, is a transporting fault, which secures the cup from falling out of the way of the squeeze-lead

1 hydraulic unit

 2 Hydraollkgehäuse

 3 work

4 hydraulic valves

§ towing lift

7 roll 6 pyrnpanköfeen

9 pressure chamber

 10 cover

11 Driiekentlasiungsraym

13 Temp ratyrsensor

14 newsletters

15 channel

 6 kanai

IT Neehgehäyse

18 ■ Receiver wheels

19 valve splitter equals 20 mechanic remse

21 ring groove

22 bore

23 Cups

24 cup herod

25 SiöSefuhrung

 26 cups »

27 Söder * of pumping strokes

Opening in the cup bottom

Zwäsclianbo

 Vorsfurg m Zwlsehen oden

31 Lingsnut the Stößerführung 32 piston guide

33 On nab l open s

34 annular groove

^Rm gn i

 36 Ringraurr!

 37 Rücksteirfeder

38 Floor guide 39 Circlip

40

Claims

 Hydrauilkeinheit for a Brermkraftnmsenine with elektrohydrauliseher valve control, ssend ~ · Hydraulic housing

an olefinic ring (32) caulked with the receiving opening (33), and a pympenal vine (8) infused slowly therein _:  - and one as Steile! trained Noekenfölger r Carrying a nook-raising ayf the pump piston (8), dadurc ^ k denotes _" that the pestle is designed as a cup (23, 23 ') with an oelcenafegrifffiache and a cup-shirt (24), since in a stot effyhryng (2 $) of the Hydrayilkgehiyses (2) fcgs ewegilch is passed, Hydrayilkeinhelt n ch claim 1, adurcii

senhemd (24) from serving as a Noekengteitahgriff cup testicles (28). Hydraulic unit according to claim 2 _S dad "rch gckcn" zi hn t _f as the "senboden (2) of one or more openings (28) is dyrehse, Hydraylikeinhelt according to claim 1, «ladörch

that the mosquito surface is formed as a mug pile (7) supported on the cup shirt {24} Hydraulic unit according to one of the preceding claims, characterized in that the column (32) protrudes from the door (33): and together with the guide (25) extends a space (36) into the socket (24) following the necking )