DE1998753U - INTAKE AIR FILTER FOR COMBUSTION MACHINERY - Google Patents

Description

RA. 166239 * 21.3.

PATENT Attorney DIPL.-INO. EGGS, 7 STUTTOART, NECKARSTR.

18. MSrζ

Applicant in s Filterwerk: Mann & Hummel OmbH, Ludwigeburg,

Hindenburgstrasse 37-45

uebräuoh & Musteranmenung
A 11 683 ~ VSS 561

Air intake filter for internal combustion engines

The invention relates to an intake air filter for internal combustion engines, in which a Stsuklappa arranged in the raw air channel, which closes a Kaitluftansaugkanal in its one end position and a V / armluf tansaugkanal in its other end position, through a thermostat around which the sucked air flows via a swivel lever attacking Äntriebsatange and a helical overload spring is pivotable against the force of a helical return spring supported on one side on rigid housing parts in its position closing the hot air intake duct, the return spring concentrically enclosing a guide sleeve that holds the load spring. The overload spring is pretensioned so that it can transmit the forces for pivoting the flap without changing its shape. But it is then compressed _s if

A 11 68?

after closing the Waraluftaneaugkanala the outside temperature continues to rise, thereby preventing the thermostat Can exert forces that are detrimental to the drive mechanism would be.

In a known embodiment of such an air intake filter, the guide sleeve is firmly connected on the one hand to the drive rod and on the other hand to a plate that supports like a return spring, the drive pin of the thermostat pushing the plate and acting on a piston that is slidably guided in the guide sleeve, against which the overload spring is supported. Uisi * bsi listen <ii £ about ^ r ljn? * r V.ns ° i '* ^< ^ -'^<t y * vr. * 4ü # b »^! / ·« »» 11 f ^ day in the power flow from the thermostat to the drive rod one behind the other. The overload spring must therefore be able to transmit the forces necessary to compress the pre-tensioned return spring without changing its shape and must accordingly be highly pre-tensioned. This has the disadvantageous consequence that the thermostat has to transfer a relatively large force to the drive mechanism in order to avoid the overloading of each \ * m ± ! Warslurt-su ^ ftTÄskassi zu ängn änärnial ^ m to be able to.

The task of the invention is to reduce the drive mechanism of the control flap su verbtssensj issbesesders di * vö « 4 *» Si th forces to be transmitted to the drive system.

- 3 -A 11 633

This object is achieved according to the invention by that the return spring and the overload spring with their The ends facing the thermostat rest against a support part driven by the thermostat and that at least one of the two support parts of the Überlaatungsifeder in the guide sleeve from a stop arranged at the adjacent end of the sleeve can be moved from.

Now the forces of the return spring and the überglas processing spring are independent of each other. The two feathers can therefore be voted independently of each other. The overload spring only has - its actual purpose snfesprs5fes «4 * 4t ·? ü» 4as Verst * !! * »de? flap to transmit necessary forces without changing shape, and their Advance payment can therefore be chosen to be relatively small. In the event of overrule, the thermostat only has one proportionately exert a small force to compress the overload spring.

The invention is explained below with reference to an exemplary embodiment shown in the drawing the drawing show

Fig. 1 is a side view erfindungsgsmäSen tu intake air filter,

Fig. 2 is a longitudinal section of the ^ Rohluftkanals in the area of thermostatic control

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Vorriohfcung, on a larger scale,

Pi.g. 3 shows a section line NaOH 111 - III of Pig. 2.

Ann miglirffcfi ίfcer »liat a tooiformlccea ßöhJLuise 1 ₁

'which is closed by a removable cover 2. At the A Rohloft duct opens into the filter housing 1 at the side 3 a * At the "ehUusiiiboden opens a clean air duct 4 the end.

The unfiltered air duct 3 forms one with its front part Cold air intake duct 5. From below into the unfiltered air duct 3 a Warmluftansaugkaaal 6 a. Before the dog parts the latter is in the unfiltered air duct 3 around an axis pivotable control flap «8 arranged, which in their one .End position (drawn in solid line in Fig. 2) the cold air intake duct 5 and in its other end position (shown in phantom in Fig. 2) the warm air intake channel β closes.

The drive for the control flap is carried out by the thermostat 9, the housing wall 10 of a bulge 11 of the unfiltered air duct interspersed with a threaded pin. Buriih two Nuts 12 and 13, the mounting position of the thermostat can be changed. The drive pin 14 of the thermostat acts indirectly via a screw-shaped overload spring 15 "which

A 11 6 * 3

ra a frontal support part 16 is the drive rod 1? supported on a pivot lever 13 de? Control flap δ. One helical return spring 19 lies with a £ tirä < © & ifc # on an abutment rigidly attached to the unfiltered air duct 5 20 and surrounds a guide sleeve 21 ″ which the overload f © of 15 picks up,

The ends of the thermostat 9 facing the 15 and the return spring 19 rest on a common support part 22 driven by the thermostat. The guide sleeve 21 is firmly connected to the drive rod 17. To support the overload fader 15 has the support! 1 22 a piston 25 which is guided displaceably in the guide sleeve 21 and which the overload spring presses against a stop 24 arranged at the end of the sleeve.

When the intake air is cold, the drive pin 14 of the thermostat 9 is pushed so far into the thermostat by the return spring 19 via the support part 22 that the drive rod 17 has the control flap via the pivot lever 18 into its end which closes the cold air intake channel 5 ( is Fig. 2 sucked gsseioSast), With the same suction temperature, the drive pin 14 emerges from the Theraoataten 9 and swivels the control flap 8 until it has reached its other end position closing the W & ftttluftanaaugkan & l 6 (shown in phantom in Fig. 2 ) “Until then, the overload spring 15 has only

1098753

-6 A 11 6S>

which have to be transmitted to adjust the control flap 8 n < twenäigen KrSffc @. The Obarl & sfcungs »spring behaves like a rigid transmission link, and it is pretensioned accordingly. If, after the warm air intake duct 6 has been closed, the intake temperature increases, the overload spring 15 is compressed and destruction in the drive mechanism is avoided.

Notwithstanding the exemplary embodiment, this can be done on the drive rod 17 provided support part 16 for the overload spring 15 in the guide sleeve 21 can be displaced «In this The catch is the winding sleeve 21 with the return spring 19 and support part 22, 25 common to the overload spring 15 firmly connected. The stop 24 is then provided at the end of the sleeve facing away from the thermostat 9.

Finally it is also possible «<Si @ guide sleeve 21 neither with the dome support part 22.25 nor with the drive rod 17 . to connect firmly. Then the two support parts 25 and 16 are in the FUnrungshUls® of both sleeves © n®nd © n arranged Attacks can be advanced.

Claims (3)

^ 7 _ RA. 166239 * 21.3. A 11 683 "4 / (^ aIu claims 1. Air intake filter for internal combustion engines, in which eina Ste. 'arranged in the unfiltered air duct, open the in their t C \ an end position a cold air intake cranal and in their Ι another end position closes a warm air intake duct, $ by a thermo flow from the sucked in air mostats attacking a swivel lever via sin © Drive rod and a helical overload spring counter the force on the one hand on rigid housing sets supported helical return spring in their position closing the hot air intake duct pivotable Isit, whereby the return spring is one of the Concentric Pühiomga sleeve that takes up overload encloses, characterized in that the return spring (19) and the overload spring (15) with their dem Thermostats (9) facing ends rest on © in © m of the thermostat-driven support part (22,25) f. and that at least one of the two support parts (25, 16) -. Skm ^ * _ _. j_. __ _ _ JK λ λ __i. _a _ ^^. • ^ • ■ % -. »1» lt1 + *. *>. ^ Λ4 \ _{M. M.} a stop arranged at the adjacent end of the sleeve (24) is slidable from. - 8 A 11 685 2. Intake air filter according to claim I _4, characterized in that the d «r overload spring (15) and the return spring (19) entire support part (22,25) for supporting the Überlastungsfedsr one in the guide sleeve © (21) displaceable iColbsn (25) and the guide sleeve with the Ajtstriabsstang © (17) is firmly connected. 3. Ansaugluftfiltsr according to claim 1, characterized in that; _a that the support part (16) provided on the drive rod (1?) for the overload spring (15) can be displaced in the guide sleeve (21) and the guide sleeve with the support part (22,25) common to the return spring (19) and the overload fiber is firmly connected. k. Intake air filter according to claim 1, characterized in that the two support parts (25 * 16) for the overload spring (15) are displaceable in the guide sleeve (21).