DE1932965C3 - Switching device for a windshield wiper washing system of a motor vehicle - Google Patents

Description

The invention relates to a switching device for a windshield wiper washer system of a motor vehicle, in which the windshield wiper motors at least can be operated at two speeds and with pauses of different sizes via an interval switch and the supply of the washing liquid via a pressure device, in particular pressure valve, is controllable.

To reverse such windshield wiper and washer

three preferred switching devices are provided in known designs. The closing wiper motors can be switched on and off directly via a wiper switch. The windshield wiper _motors are reversed in the direction of rotation. This wiper holder normally has d switch positions if the windshield,, shear motors can be operated at two different speeds. If the windshield wiper motors operate periodically only in different grolkn io time intervals, then the wheel shear motors is supplied with the supply voltage via a gerennten so-called interval switch, which are constructed as an astable multivibrator and adjusted to different sized breaks 15 J _151n This separate step switch can be applied to vcrs edene RastoteHungen are set. Above this, this windshield wiper and washer system also requires a valve that can be operated by foot or hand switch, which enables the supply of the soap nuts , 0 ⁰ ^ 'vvi' _s d, e ', · -

he 1910 873 shows ol, _dje Sche.hm-

η ^ _

need to be changed D
laiiht no | nu.r \ a
minors _r .,

The German _t ^Gehr ^ f _d
a Schalteinchung rn.t d-.
wiper motors as well as you.

liquid over cn ^
controllable snid, so w, e it

according to the German A

wishes is. Aiideeeschrift 1 297 367 is

From the German Aus ^ «.« Intt. ' _{d the W} i-

^ X *** »*« ■ ^If ^ from this out ^ «" ^ "^ _inn angss osition ^ht . ^Rough ^ ^L " ^l f ^ f " _d j _Intor .

adjusted, then et Reg «, wide st ^an , be _concerned

vallschalters verander .JaB e π des W.schermotors m .s chü ^ rna _{aUer in}

can be provided. Ie we r ^c - ^r i _{d dic}

% ££ however in Uh _; -

seer switch one
the BeU «^
ganglion

_The operation of a Schcibenw.sch-Waschan.ag. With these various possibilities, three switching devices are required. which are mostly still arranged \ ne separately from one another. With the help of these switching devices it is not easy, quick and without great considerations to fail the desired operation. To simplify the operation of such a windshield washer system. A simplified switching device provides only two separate switches, one of which controls the windshield wiper motors for continuous operation and the other for intermittent operation. The switch for the continuous run also has an axially adjustable push button that directly controls a pressure valve of the ash system.

So is z. B. by French patent specification 448 267 an interval switch for windshield wipers known with a two-lane rotary switch, m whose starting position the Interval switch can be switched off is, where in the following W.nke be «, ch der Interval switch can be switched on and in steps to different, smaller and smaller pauses can be set. In a subsequent E.nscha production is the wiper motor is switched on continuously.

This known windshield washer system only sees one Actuator in front of which the wiper mc, or in intervals of different lengths and in continuous mode "b can be controlled at a very specific speed

can. A change in the wiping effect through E-heights the engine speed is not provided ^ In addition can switch from one operating position of the common actuator to another Operational status only due to short-term interruption of the motor circuit.

From the German catalog 1 161 161 there is one Washer known in which the W. shear motor be, de actuation of a rotary switch continuously from a first low to a second higher speed is adjustable and one with the rotary switch coupled pressure device for BetaUgen the car wash via one in the rotary knob of the rotary switch-mounted push button with actuation g

regardless of the angular position of the pressure scarf SISÄ

Wiper motor between two speeds conti ^^. ^ X ^ ermotor with distinctions, in which the>% - istnc.

* _{5 borrowed} speeds besides ₎ ^ dcr

Be. ^ ^bek »D ^^^^^^ interval

Na <: h ^ ^ _{n only vice} -

Can be set if the ^^ 5ϊΓΪ position is switched on yj ^ _{to not [u} „.

h g J% ^S _c ^ S "gen. ⁸ in _S special « then. ^^^ "Suddenly a heavy rain be T ^{n {c} ^^ J _kuno _ _by continuous running only

^^^^^ interruption can be increased 35 over around. Briefly

can. ^ _{Invention by} SchaHeinrich-

f _{ir (w} wiper-washer system of a power development for Line ^S ^ ™ 'J ⁰ "* ^1;?" mtervallbetrieb _inen and

^ '^^^, ^ t ^ tei speeds enables 40 a continuous run m .: ζ _{ch des Scha} , _lcr .

where be, all. corridors. _{any increase} or

^^ Si effect is achievable. In the case of an _{ichtu in the one} or

^^ X ^ tion in the work area should be 45 other ^ "" ehnchtu g ^^^^ ^ _{5 wipe to s}

be avoided. The well-known E.nknopfeher ve ™ eae _Interval i _b etneb and the permanent words "" g ^ _{n should be} kept .au ία

50 ^ko "^ ⁿ _{switching means} f _or a windscreen ^ ^fe jna't _{Kr aftfahrzeug} it, in which the

Wa ^^ J ^an ^ ^e _chermotoren at least two rotary ^ J ^e 'J ™, ™ “ _an interval switch with various ^ ™ ^T can be operated and

55 Jn gn, Be ^ Paa. ^ _{Over a} ßruck-

L suffered nrung u. Pressure valve, controllable

pay attention 'n ^ ondere ^^ ^

is. ⁿ is ^"n ° ^e j _{ichtung ei} n multilane continuously aB.ris switching" mj * J _{f provided practice. the}

60 ^ ⁿ J ^ell ^ ^r _s ^e ; _{Switch position of the} wiper ^{motors in} J ^ ^A ^ ^s ^ _rva , _{| scha} , _t | _{r are} switched off in one and the « _{dcn de,. Interva} 11schaltcr e.nge-

_{d stu} f _e is in different NLOS, always small ^ ^^ adjustable and in a further 65 ^ '^ I _winkelbere the wiper motor e.

via a pushbutton with an actuation glicd mounted in the rotary knob of the rotary switch and with the Rotary switch coupled pressure device, / .. B. a pressure valve, to operate the washing system independently can be controlled from the angular position of the rotary switch. This combination of known features above all has the advantage that by simply turning the rotary switch in a certain Direction of rotation the cleaning effect can be continuously increased or reduced, with the Continuous running end position with the higher speed and; lic switching position through the end stops of the Rotary switches are highlighted. This is despite the large number of adjustable operating options Optimum achieved for operating the switchgear.

The design of the interval switch and the influencing of the breaks are characterized according to a further development of the invention that an astable toggle switch with an electromagnetic switching means is used in the output of the toggle switch which determines the pulse phase and that a first switching path of the rotary switch in the interval The angular range of the resistance value of the RC- Glicdes of the flip-flop that determines the pause is continuously reduced.

The supply and control of the interval switch is carried out according to the invention so that the supply voltage for the interval switch can be supplied via a second switching path of the rotary switch. whereby in the interval angle range the toggle switch and in the continuous run angle range the electromagnetic one Schaltmittcl are directly controllable.

According to a further embodiment, the control of the windshield wiper motors is carried out according to the invention Switching device executed in that the supply voltage for the windshield wiper motors in the interval angle range of the rotary switch via a working contact of the electromagnetic Switching means of the interval switch and a third switching path of the rotary switch can be fed. whereby the wiper motors can be controlled via the control input for a first, lower speed. To increase the speed in the continuous running range, the invention provides that the supply voltage for the windshield wiper motors via the third switching path of the rotary switch also in the continuous running angle range can be continuously fed to the control input of the windshield wiper motors for the lower speed and that via a working contact of the Switching means of the interval switch and a fourth switching path of the rotary switch in the continuous running angle range the supply voltage for the windshield wiper motors via a continuously decreasing variable resistor can also be fed to the control input for the second, higher speed.

If the windshield wiper motors have an automatic return device, then this can Return can be ensured in intermittent operation if the windshield wiper motors have break contacts of the electromagnetic switching means of the interval switch, the two for automatic reset required potentials of the supply voltage source are supplied separately.

The structural design of the new switching device can be designed so that the range of rotation of the rotary switch is limited to 90 ° and the switching paths in a switching level around the switching level of the rotary switch are grouped and arranged accordingly offset on the switching shaft Shift arms work together. However, the arrangement can also be made so that the range of rotation of the rotary switch is limited to ', where n-Schaltbahncn of the rotary switch in a switching level summarized and the switching paths are distributed over several switching levels.

ίο The union of the switching device with the interval switch can be made so that the components of the interval switch in the housing of the rotary switch are housed. In extension of the switching shaft of the rotary switch is interposed of a hinged control element on the housing of the rotary switch, a pressure switching device for switching an electric pump on and off, or a pressure valve, permanently attached. This control element is via a hole in the selector shaft

ao led and in connection with the push button standing actuator deflectable and thus controls the pressure switching device or the pressure valve the car wash.

The invention is based on the drawings

»5 explained in more detail. It shows

F i g. 1 the circuit diagram of the interval switch, which can be controlled via a switching device according to the invention.

F i g. 2 the connection between an interval switch according to Fig. 1 and one equipped with two control inputs for different speeds Wiper motor and

F i g. 3 shows in section a structural embodiment of a switching device according to the invention.

The circuit diagram according to FIG. The interval switch shown in FIG. 1 is connected to the supply voltage source of the motor vehicle via the terminals -l · and -. The interval switch is essentially an astable toggle switch with the transistors T1 and T2, to which a four-band rotary switch with the switching tracks 51, 52, S3 and 54 is assigned. This rotary switch has, for. B. at the left stop, a rest position ivO, which are followed by two angular ranges h> 1 to wl and w3 to m> 4, the angular position w4, z. B. '., Eim right stop, the other end position of the rotary switch is. Four switching arms of the rotary switch are mechanically coupled via the switching shaft of the switch, so that they run synchror when turning the rotary knob DK. In the pulse phase of the flip-flop the transistor T1 is conductive and the electromagnetic switching means SR connected in the collector circuit is excited. The transistor Tl is non-conductive and remains non-conductive until the capacitor Cl has discharged through the resistor R 1. The time constant of this RC element determines the pulse phase. When conducting the transistor Tl, the capacitor C charges! About the conductive base-emitter path of the transistor Tl and the collector resistor R2 of the Tran sistor TT. quickly, the base of the Tran sistor Tl facing terminal assumes positive potential. If the capacitor Cl is discharged, then the transistor Tl is conductive and the transistor T is non-conductive. The capacitor Cl discharges via the conductive transistor Tl and the resistor series connection of the resistor R 3 and the control resistor Rp controlled by the wiper of the switching track 51. This discharge time can be as

through the division of the rotary switch int Inlersall angle range ir I to ir2 can be continuously changed. As the adjustment angle increases, the effective resistance Rp becomes smaller. The discharge time nirr, it iib and the pause of the inertia circuit becomes smaller. After the capacitor has been recharged ("2 the pulse phase begins again with the hurrying transistor 71 and the non-conductive transistor / '2. The duration of the discharge is determined by the constant discharge time of the capacitor C" 1 via the resistor R 1 chosen so that the windshield wipers can perform a certain number of cycles.

via terminals 31 / '. 53. 53a and 53, this interval switch is connected to a two-way wiper motor Λ / (Fig. 2), which is equipped accordingly with two power supply inputs 53 and 53 /) for the two speeds. If a vehicle has several windscreen wiper motors. then the corresponding connections are connected in parallel. A switching device Rl! co-controlled. which ensures the automatic return of the wiper motor M.

If the tier rotary switch is in the starting position ιιΊΙ. Then, the switching valve Sl interrupting the feed line fiii the astable circuit. The windshield wiper motor A / and the flip-flop switch are switched off. In the following interval Y-angle range from the angular position vr 1 to the angular position h-2 of the rotary switch, the potential is switched on to the toggle switch via the switching path S "2. The toggle switch works as already described. The electromagnetic switch SR responds in each pulse phase. The contacts sr 1 and sr Z are actuated. Via the normally open contact sr2 and the downstream contact track S3 , supply voltage is supplied to the wiper motor M via the connection 53 in the interval angle range it 1 to iv2 and the continuous running angle range u ¹ 3 to Vi-4 This connection corresponds to the control input for the first speed. As long as the switching means SR is energized and has closed its contact srl . The windshield wiper motor M runs at this first speed. After the pulse phase, the switching means SR drops and becomes via the normally closed contacts 5rl and srl the beden potentials - and + separately supplied to the switching contact RU via the connections 316 and 53 a . This switching contact leads RU depending on the position of the switching cam SN to terminal 53, the one or the other potential too, so that the back shaving Hung of the wiper motor M is also executed, switch off the potential on the terminal 53rd Tm the interval angle range w \ to h> 2, the pause between the pulse phases becomes smaller and smaller and depends on the angular position of the rotary switch.

If the rotary switch is turned further into the continuous running angular range w3 to η · 4, then the switching means SR of the interval switch is continuously excited via the switching path 52. The diode D in the collector circuit of the transistor Tl causes the decoupling to the astable multivibrator. As long as the rotary switch assumes an angular position in the continuous running angular range iv3 to H'4, the switching means SR remains energized. The connection 53 continuously carries the potential and the windshield wiper motor Λ / runs continuously at a first speed.

With a closed contact srl of the switching means SR in the Daiierlaul angular range n-3 to ti · 4, the supply voltage is also fed to the terminal 53 /) of the windshield wiper motor s M via a fourth switching path. The current flowing in this circuit depends on the angular position of the rotary switch. tla the wiper of the switching path .S'4 with different angular positions influences the rheostat Rq in the sense of a resistance reduction. The slider for the switching path .S'4 and the resistor R (j can be set up as a potentiometer in a known manner. In the end position n'4 the resistor Ri / is switched off and the supply voltage is directly at connection 53/1. The Seheibenwisehermolor Λ In this embodiment of the switching device, the speed of the windshield wiper motor Λ7 can be continuously adjusted from the first, low speed to the second, higher speed in the continuous running angle range tt-3 to vr4.

The rotary switch can be rotated in any direction. Therefore, when turning clockwise, the Cleaning effect on and off when turned to the left.

In Fig. 3, a structural Ausl'ührungsbeispiel a Schititeinrichtung according to the invention is shown in section. In the housing 10 of the rotary switch, the switching shaft 11 is mounted, the four switching arms 14 of the switching tracks .S1, S2. .S'3 and .S'4 carries. These switching arms 14 work together with four switching tracks, which are grouped accordingly around the switching shaft 11 in a switching plane 13 and of which the 'switching tracks .S'1 and .S'4 with the control resistors

stands Rp and Rq are designed as potentiometers. The components 16 of the interval switch are arranged on a building plate 15 which is also accommodated in the housing 10 of the rotary switch.

In addition to the thread 12 for the rotary knob, the sound wave 11 has a continuous longitudinal bore 17 through which an actuating member is guided. which is in connection with the axially displaceable push button mounted in the rotary knob. A deflectable control member 18 with a receptacle 19 for this actuating member is arranged in the extension of the switching shaft 11. This control member 18 actuates the valve plug 20, which closes the opening 26 and is pressed on by the spring 21. When the valve plug 20 is actuated, a path for the washing liquid is free via the bore 26 of the valve, which path leads from the bore 23 of the connector 22 to the bore 25 of the connector. The connections -J-. -, 31 i>, 53, 53 a and 53 b of the interval switch according to FIG. 1 can be tapped off via flat connectors 27 on the housing 10 of the rotary switch.

The invention is not limited to the combination with a pressure valve. Instead of one can be an electrical switching device for switching an electrical feed pump on and off be provided for the washing liquid. The windshield washer system is not generally used for cleaning the windshield, but also the rear and side windows and the cover glasses of lights arranged on the vehicle, if this arrangement is desired.

1 sheet of drawings

Claims (10)

932 965 claims: 1. Switching device for a Seheibenwiseh washing system of a motor vehicle, ie the wiper motors can be operated at least at two speeds and an interval switch with different sized pauses and the supply of the washing liquid via a pressure device, in particular pressure valve, is controllable, characterized in that as Switching device a melubahnigcr continuously adjustable rotary switch (SI, S 2, S3, SA) is provided. via which the windshield wiper motors (M) and the interval switch are switched off in the initial position (icO), the interval switch is switched on in a foL.Miden angle range (u'l to m'2) and can be continuously adjusted to various, increasingly smaller pauses and all in one further following angular range (ic 3 to ic4) the windshield wiper motors are continuously adjustable from a first low to a second higher speed, B. ei "pressure valve (20, 21, 26) for actuating the washing system can be controlled independently of the angular position of the rotary switch. 2. Switching device n; 'ch claim!,. Characterized in that an astable toggle switch (Tl, 72) with an electromagnetic switching means (SR) is used in the output of the toggle circuit which determines the pulse phase and that via a first switching path (Sl) of the rotary switch in the interval angle range (u'l to m'2) the resistance value of the /? C element (R 3, Rp, C2) of the flip-flop that determines the break is continuously reduced. 3. Switching device according to claims 1 and 2, characterized in that the supply voltage (+) for the interval switch can be supplied via a second switching path (52) of the rotary switch, the toggle switch (Tl , T2) and in the continuous running angle range (ve 3 to M '4) the electromagnetic switching means (SR) can be controlled directly. 4. Switching device according to one or more of claims 1 to 3, characterized in that the supply voltage (+) for the wiper motors (M) in the interval angle range (icl to w 2) of the rotary switch via a normally open contact (ir 2) of the electromagnetic switching means (SR) of the interval switch and a third switching path (53) of the rotary switch can be fed, the windshield wiper motors (M) being controllable via the control input (53) for a first, lower speed. 5. Switching device according to claim 1 and one or more of claims 2 to 4 thereby characterized in that the supply voltage (t-) for the wiper motors (M) via the Third switching path (S3) of the rotary switch also in the continuous running angle range (ic 3 to tv4) of the rotary switch continuously to the control input (53) of the windscreen wiper motors (M) for the first, small nere speed can be supplied and that the supply voltage (*) for the windshield wiper motors (M) via a continuously decreasing value via a working contact of the switching means (SR) of the interval switch and a fourth switching path (54) of the rotary switch in the continuous running angle range (ic3 to ic4) Rheostat (Rq) auc. _: the control input (53 b) for the second, higher speed can be fed. 6. Switching device according to one or more of claims I to 5, characterized in that via normally closed contacts (irl, vr2) of the electromagnetic switching means (SR) of the interval switch the wiper motors (M) the two potentials required for automatic resetting after disconnection (-t ~ and -) can be fed separately to the supply voltage source. 7. Switching device according to one or more of claims I to 6, characterized in that the range of rotation of the rotary switch to 90
is limited and the switching tracks (51, 52, 53, 54) are grouped in a switching plane around the switching will (11) of the rotary switch and work together with switching arms (14) arranged accordingly offset on the switching shaft. 8. Switching device according to one or more of claims 1 to 7, characterized. that the turning range of the rotary switch is ¹ is limited, with n-switching tracks of the rotary switch summarized in one switching level and the necessary switching paths on several Switching levels are distributed. 9. Switching device according to one or more of claims 1 to 8, characterized in that that the components (16) of the interval switch housed in the housing (10) of the rotary switch are. 10. Switching device according to one or more of claims 1 to 9, characterized in that in extension of the switching shaft (11) of the Rotary switch with the interposition of a steerable control element (18) on the housing (10) of the Rotary switch a pressure valve (20, 21, 22, 24) is firmly attached and that this control member (18) via one in a bore (17) of the switching shaft (11) and with the push button in the rotary knob of the rotary switch connected actuator deflectable and above the Washing system is controllable.