DE1939451C3 - Windshield wiper system with pneumatic windshield washer system for motor vehicles - Google Patents

Description

'>. Mixing and washing plant according to Ar, spiueli ν characterized in that the L tv: pressure valve f 23) au! the operating pressure is set; and.!. αϊ the disc wiper motor (13) and die ki'lhenpump ·· (14! permanently coupled inik'inandei are.

I.V.- l-rlinduiii · concerns a disc ^ ischaniage ■ with pneumaii-di operated sdieibenuasch.mlage door Urafifahr / euge. consisting of a piston pump / um L.i / eiiLien von Druckliitt for the Druekleitung-sv stone of a liquid storage container and one TV washer room. the one interval switching area / ur periodic short / urgent connection of the Sdieibcnv-isehermotors via a pneumatic Has switch which can be controlled by the pressure of the piston pump in adjustable time intervals.

Fine such windshield washer is due to the U.S. Patent 3,426,350 known. In this known windshield washer, the pneumatic Switch actuated via the pressure build-up in the supply system. There is also an adjustable pressure chamber necessary. Depending on the pre-tensioning of the membrane in the pressure chamber, after a certain Time the pressure at the output of the pressure chamber! autitet-ΜΊ and press the pneumatic switch. By continuously placing a spring in the pressure chamber, the switching interval for set the pneumatic switch.

This known adjustable pressure chamber requires a considerable effort and also has the disadvantage that it does not work reliably with the robust operating conditions of a Kraftfahrzei ¹ ^. This pneumatic actuation of the windshield wiper motor also has the disadvantage that the wiping process begins with a variable pause, which is followed by a short wiping process with the control via the reset switching device of the windshield wiper motor. For this purpose, the pressure reduction for the pneumatic switch must then be initiated via a valve controlled by a further switching device of the windshield wiper motor.

The object of the invention is a windshield washer system to modify this type so that also in intermittent operation of the windscreen wiper motor is started immediately with a short wiping process to the there is then a changeable pause. The effort for deriving the adjustable Control intervals of the pneumatic switch reduced and only operationally reliable components be used. This is achieved according to the invention in that the pneumatic switch is in the interval switching range of the wiper washer switch can be actuated via the pressure of the piston pump and then introduced via the control nozzle Pressure reduction is resettable in adjustable time intervals and that with actuated pneumatic Switch a switching contact interrupts the circuit for the windshield wiper motor, while others Switching contacts the reset potential (s) to the reset switching device of the windshield wiper motor turn on. To change the tax inter-

3 4

.,!: -, üi! - den pueuin.iir.chei ^ Sdialler i-. _: ium ii, .Ji ₁ pneumatic switch each via a pressure \ orkaiii-

'"''' ^llL1 - ^ι ' ^Πι -' ¹¹ Si ¹ Ul. ' -ι k -..--, klk ιν ■ _L e.,. u--, -ι iner is controllable.

■ ^; - ^: · ^{ί :::! Ι Nhl llcr ln} it - ■ ΐ ι · -: 11 · -; dc \ J. _i; v ,, ul Like 1 ι ü. I / ciiit. becomes the curtain wiper motor

· ■■ - ^ "'i ^ sbetiieb -, unit he, in ISl-i.UhA des pn, - _u 13 over the wiping-washing sounder Kt an / we.

■ - ¹ '. u ^ V n μ, ι-. '«' Υ ' ¹ Me .in will:'. ■■ .- J) .- \ kiu- ■■. Siciieremeiingeii driven. In the shared parking

'- "' ^Lin ^ ^rs l-iiKi ..- eü de-. Piiei, i, i: ,,, - Jieii SJi.il J-aiiiiiig / 'is the shift rod 11 so because inserted.

■ ''^{:; ::} '"- ¹ ·''Ι<Ίι ^ -!' .- IIslIiiiIhmi, icliiuu- d · <.!, H the kuiitaklhriickenlrager 12 the top row

■ ^: ■■ enwi-.uieiini.hM -, .-:.! Jen S Jk, benw ι-die, - w. Ii contacts. The two po; entiale of the

^1Uv - '' ^! ' ^Vi ''e' ^ iii'U'iii pneiiüi iti-Lliein Sei- iiei Sp; innuiii; si. | Tielle are therefore attached to the two external

N.ich den Dn.,>..!>■!> .. ii, mv, - J _u - Reu. m! uc:., contact springs of the reset switch! t \ ornchtuiii; 17 de-

■ ^: " ^: '! -' I 'pneunii, m-Jk- VhJi.-. Ui.kk ι, ι ,, ι liii.t S J.eiheii-A ischermotors 13 switched on With the help of ■ ^: ^ ■■ eibciiw'-chc!>'!>'; ■: iieul ju j _vS , ujeortlneti ■■ switching cams w-will your control-

\ :, i an e.geiieii Λ: ii11J, -; _M ,,;, " _{! ΙΜ} j _k - k .--! Bcii- gang for the low rotation / ahl the required

; . ·. · And never elekin-J.v-i "sJi.ii'nhliei, -u; MiiKet-! <Iick-ie !! potential supplied until the reset switch-

■ ■: .ier Kolbeiipnmp · ι -; - n, i n.-ieiH-ii des lietnel-.s- i ₅ \, .rnchuing 17 the ejection division shown

■ -. ic- im DiucklciliM. iem k..nn ·, ei, · ι:>; ci is taken. In the endurance switchgear I is

if the ktiliv! Mv μ: i Jeu. N ₁ i μ, ivn w ι - Stciierpoteiitial to the control input for the low

i'iu'tor coupled, t m:;,; MM -. E ki'ppliiiii: applied continuously at speed. The windshield wise man

■■ Jk ilv- operation -,;! , 1 - .. S. ^ - ...:; .-n.ii ig .iiitgehobe: 'um rotates constantly with the low speed.

: \ .. ii decrease Ue-, Ueüiiiwil] ul'ncs -eliisitatig 20 and the piston pump 14 is also controlled, mi dal.i

..! he produced and how it si,! 1 by the in the Druckleilui ^. , star 18 an operating pressure

- Wei / erische PatentsJ ₁ ni .ιλ3 2 («ή ivN.mni it aufhaut. This operating return is sufficient, in the liquid-

i) the actuation of the pnetimatis. : A switch can be used to generate a pressure, -o

., • 1 emc upstream pressure chamber take place, the dal. ', When the valve 24 is actuated, the washing

. A ('berd, > ick \ ent, l and the control disc are printed in liquidity in the fluid line system 19

there is a bond. With the ('herdruckvcnlil becomes and at the find over the spray nozzles exits the

·. i prevents the coupling between the windshield wiper motor 13

. Hcibenwischermotors in the Druckleinmgssystem and the piston pump 14 is chosen so that the

ι, high pressure builds up while coupling with the Uegcldüse when the operating pressure is reached

he Diuckabhau in the Di uckieitung.ssysiem at InIe ₁ - 30 automatically canceled and when the load

.illbetrieb is adjustable. The liilerwillbetrieb is the drive pressure is automatically restored. the

r continuously adjustable. The valve 24 can be actuated via a switching element

According to one embodiment of the invention, this is the Wiscn wash switch, e.g. via an in the

Conical nozzle axially displaceable via a sound element of the wiper-washer switch rod 11 of the wiper switch

V iialters adjustable. By the German Offen! ·. · - 35 bares actuator, are carried out

gungsschrift MSO 2T-) and the USA patent specification In the continuous running switch position II the preliminary

3 431 578 it is known to operate a control device by means of a gear similar. Via the contact bridge support 12

screw attached to the dashboard or the control potential is now the 'wide control input

A manually operable cam disk is supplied to the input / output of the windshield wiper motor 13, which

^ste " ^en - 40 thus operated at the second higher speed

Since the control nozzle is practiced after a further configuration.

In the additional interval switch position Iv , continuous running switch positions and the parking switch position, the control potential is closed via a separate circuit of the wipe-wash switch. If the control input for the low speed is again supplied to these switching processes, a pressure reduction in the pressure 45 is supplied. In this circuit, however, the resting system is prevented. contact 21 c of a pneumatic switch 20 turned on. The design of the pneumatic switch can drag. First of all, the windshield wiper motor 13 runs, in this case it is expedient to make it so that and the piston pump 14 coupled therewith builds up the operating pressure in the operating pressure for actuating the pneumatic pressure line system 18. The switch is larger than the one for resetting this 50 pneumatic switch 20 responds, and the control switch requires he cut-off pressure and that this circuit for the windshield wiper motor 13 is cut-off pressure for conveying the liquid from via the contact 21 c interrupted. The two übdem liquid reservoir ring in the Flüssigkuts- working contacts 21 α and 21 b cause sufficient conduction system ( '! Produces a switching member of the Intcrvall switching position Iv appended reset wipe-switch may then also during the 55 potentiate the reset switching device 17 of the intermittent operation of the windshield wipers, a washer / windshield wiper motor 13. The windshield wiper process is initiated when a valve in the flow therefore automatically assumes the switch-off position.
fluid line system is opened. However, on the pressure line system 18 or on the pneumatic system is known from the USA patent specification 3 137 8Kl, a switch 20 is connected to a control nozzle 15 in the liquid line system of the washing system, which is operated via a switching element of the wiping-washing valve by a switching element of the wiping system. Switch is adjustable. To be controlled depending on the setting of this wash switch. Control nozzle 15 is the pressure in the pressure line system. The invention is reduced to Fland by two in the star 18 more or less quickly. This drawing, which is shown schematically in the windshield wiper pressure reduction, determines the break in intermittent operation, and washing systems are explained in more detail. It shows 65 reaches the pressure in the conduit system 18 is a Fig. "1, a windscreen wiper and washing system with the value at which the pneumatic switch 20 zuriickpneumatischem interval switch and is provided, closes the contact 21 c in Figs. 2 shows another embodiment, in which The pressure in the pressure line

processing system 18 is rebuilt via the piston pump 14. The switching processes are repeated and interval operation is ensured.

The liquid is discharged from the liquid storage container 16 via the valve 24 as a result of the pressure pressed in the pressure line system 18 into the liquid line system 19 and occurs at the spray nozzles out. So that this washing process can also be carried out during interval operation, the Cut-off pressure for the pneumatic switch 20 is not set too low.

The system according to FIG. 2 does not differ in its mode of operation from the system according to FIG. 1. Only the wipe / wash switch 10 is wired differently, since both reset potentials are permanently applied to the reset switching device 17. The switching contact 21 d of the pneumatic switch 20 is designed as a changeover contact, which interrupts the windshield wiper circuit, which runs via the interval switching position / r of the wiper-washer switch 10 and switches to the central spring of the reset switch device 17 of the windshield wiper motor 13, which is currently switching over relinquishes the required restoring potential.

The pneumatic switch 20 of this system is connected to the pressure line system via a pressure chamber 22 18 connected. This pressure pre-chamber 22 has, in addition to the control nozzle 15, which in turn is shown in

ίο the interval switch position / v of the wipe / wash switch 10 is adjustable by a switching element of this switch, a pressure relief valve 23 on. This Pressure relief valve 23 limits the pressure in the pressure line system 18, so that the piston pump 14 can be permanently and directly coupled to the wiper motor 13. Even when the Only the operating pressure set at the pressure relief valve 23 in the pressure line system is used in the windshield wiper motor 18 built.

1 sheet of drawings

3601

Claims (8)

Patent claims: I. Disks «ischanlagc with pneumatic hcta-!. 'JkT windshield washer system for !" Vraflfahr / cuiic. Consisting of a piston pump / um Lir / eueen \. chc! - ■> \ .tsehersehalicr, the emeu Inters allsdialtbereich. ■ ui periodic short / urgent l-inschaluuiü of the ij Nchcihcnw ischermotors over a "! pneumali- -v üen Vhalter, which from the pressure de ι Κ. 'Hvnpuinpe in adjustable line intervals alk ■■ <■ U; . ib.ir ii. thereby geke η η / e ι eh η ο; . d.! ¹ the pneumatic Sehalier (2 (() in the interval'- ι s and then the pressure reduction, which can be initiated by means of a Rcjeldüse (15), can be returned at adjustable time intervals and that when the pneumatic switch (20) is activated, a switching contact (21 r or 21 (/) interrupts the circuit for the windshield wiper motor (13), while further sound contacts (21 ei. 21 b or 21 ti) connect the reset potential (s) to the reset device (17) of the windshield wiper motor (13). 2 windscreen washer and washing system according to claim 1, characterized in that the piston pump (1 l) with the windshield wiper motor (13) is coupled, the coupling being canceled automatically when the operating pressure is reached and is automatically restored when the operating pressure drops. 3. Windshield wiper and washer system according to Claims 1 and 2, characterized in that that the pneumatic switch (20) is preceded by a pressure chamber (22), which with a pressure relief valve (23) and the control nozzle (15) is in communication. 4. Windshield wiper and washer system according to the Claims 1 to 3, characterized in that the control nozzle (15) via a switching element (11) of the Wipe-wash switch (10) is adjustable. 5. windscreen washer and washing system according to claims 1 to 4, characterized in that the control nozzle (15) in the continuous switching positions (II, I) and the park switching position (/ ') of the wipe-wash switch (10) closed is. 6. Windshield wiping and washing system after the Claims 1 to 5, characterized in that a switching element (11) of the wipe-wash switch (10) a valve (24) of the liquid transfer system (19) can be controlled. 7. Windshield wiper and washer system according to claim 1, characterized in that the wiper-wash switch in the interval switching position (Iv) and the switching contact (21) of the pneumatic switch (20) of the windshield wiper motor (13) the control input for the low speed can be controlled. 8. Windshield wiper and washer system according to one or more of claims 1 to 7, characterized in that the operating pressure for actuating the pneumatic switch (20) is greater than the cut-off pressure required to reset the pneumatic switch (20) and that this cut-off pressure for promotion the 1 iu-siiikcit from the liissigkeitsvorratsbehälier; I6> m the liquid succession system (I ¹ J) from icidu.