DE1539173A1 - Electric ignition device for internal combustion engines - Google Patents

Description

^; IUNr »8764 18.11.1966 Li / Sl

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ο B Π I BOSCH GMBH »Stuttgart W, Breitscheidstrasse 4

Electric ignition device for internal combustion engines

The invention relates to an electric ignition device for internal combustion engines, comprising at least one light source whose radiation onto a light-sensitive electrical switch element ¹ overall aligned and utilized to trigger the ignition process, _Oi is

Such ignition devices have the purpose- * that in a Zyw Fuel compressed in the internal combustion engine mifich to inflame. The ignition is triggered by an electrical

'■■ ·' ■ - 2 90984 9/0509 '

6AD ORIGINAL

ROBERT B £> SCH GMBH R ₉ Mr. 8764 Stuttgart 18o11 * 1966 left / sl

see flashover (ignition spark) on the protruding into the cylinder

Spark plug causes. To trigger the ignition process, the

In the present case, the one emanating from the light source, onto the light-sensitive electrical switching element directed radiation

with the aid of a component I moved by the internal combustion engine influenced"

For coil ignition devices where the ignition energy is inductive is saved »is interrupted, for example, using the light-sensitive electrical switching element at the point of ignition the circuit of the primary winding of an ignition coil, creating a Generated high-voltage material in the secondary winding and the. Spark plug is supplied «

In the case of capacitor ignition devices * in which the ignition energy is stored capacitively, a light-sensitive electrical switching element can be used at the point of ignition a suitable charging device charged capacitor via the Discharge the primary winding of an ignition transformer »whereby the spark plug connected to its secondary winding receives the high-voltage surge required for electrical flashover »

In most cases of application, however, the internal combustion engine has several cylinders and consequently the ignition device has several candles to be ignited one after the other, so that a so-called ignition distributor is required, which closes one of the candle supply circuits in a specific order Purpose meh ·; rere. each with a spark plug connected contact and a contact arm assigned to this contact, which sits on a skin driven by the internal combustion engine and in a certain angle of rotation position ignites the spark plug in each case.

009849 / 05Ό9 bad original

ROBERT BOSCH GL1BH RdTr * 8764

Stuttgart 18 «11.1966

The use of a light source in conjunction with a photosensitive one electrical switching element to trigger the ignition, process, gives the advantages that on the otherwise for the purpose provided »can be dispensed with due to a cocci that can be actuated on the distributor shaft. <> Such breaker switches have the disadvantage that their »contacts easily become dirty due to burning and oily and that it as a result of friction, bouncing and a decrease in contact pressure not always exactly at the ignition point - ignition pre

trigger aisle *. . ■ '

In addition, ee. (. According to * DAS 1 120 81.2) for multi-cylinder internal combustion engines also known, with the help of a light source in conjunction with a photosensitive electrical SchaltgljLed the ignition circuit of the respective plug to be ignited switch on and thus. the conventional ignition distributor «

In order to reduce the radiation of the "light source" directed at the light-sensitive electrical switching element at the point of ignition through fin to be able to influence the component moved by the internal combustion engine, in all of the applications mentioned, the light source and the light-sensitive electrical switching element are directly structurally connected to the "internal combustion engine" the component moved by the internal combustion engine as one on the Distributed in the meantime »aperture reaching into the beam path formed and the light source and the light-sensitive electrical Schaltgiied in the housing of the internal combustion engine attached kiücidver parts rs housed, but there are subject these switching elements are subject to heavy use duroh mechanical Vibrations baw <heat effectsβ takes place, for example, ale Light source use an oil lamp ^ so can- the vibrations easily cause a rupture of the filament and consequently the Put the ignition device out of operation

909849/0509 -

ROBERT BOSCH GMBH- R ₈ MiT ₀ 8764 ^

Stuttgart

electrical switching element a photodiode hm ° a phototransistor is provided, the electrical hardening of these switching elements and thus the electrical ignition device can be adversely affected by the effects of heat, since such diodes or «. Iran? "Siatoren very heat are dependent on _β. ...., -. . -

In addition, there is the possibility that as a result of 'the constantly; Acting vibrations for fastening the light source or ", of the light-sensitive electrical visual limb before" seen very robbery "" solve verbicides and that thereby the situation these switching elements changed, which is also the correct one May endanger the operation of the ignition device

The invention is based on the object of an ignition device, of the genus mentioned at the beginning, in which the Lieht * - source and / or the light-sensitive electrical switching element be provided in a place where the vibrations b ^ Where the thermal effects of the internal combustion engine no longer have a harmful influence on these switching elements «» In addition ..... should, the radiation emanating from the light source during the Constantly operating with safety on the light-sensitive electrical Be directed ". ; :

This object is solved by the radiation of the light source daß'erfindungsgemäß with the aid of an optical fiber to the electric Üchtemiifindliehe scarf tglied directed and 'einflußbar in. To s, I sawn bekaniiter manner by a moving of & SSY Brennkraftma'achine component is, " ·. ... ■ _, - ■ .. ^ _=,. - ', .., -.-: ..- ■? "^ V .-. ■ ......, -....- ... -

Under, ^w Liclatl € ite7 ⁿ so, !! a structure through which the beam path not only regulates, but also changes. Curves "Seken can be steered, ο. Suitable for this are β ogeiianate itabe vorzueweie-inflexible design, mirrored f ^ channels and the like. -, ·

909849> 0509

"ROBERT'BOSCH GMBH R« Hr · 8764.

\ Stuttgart 18 »11ö1966 Ll / Sl

Details and other features of the invention are based on Bind the embodiments shown in the drawing in more detail described and explained *

It shows! · .- .. '. . "

1 shows the circuit arrangement of an electrical ignition device for an internal combustion engine, the ignition distributor shown physically in partial longitudinal section and with components for realizing the Invention is provided,

FIG. 2 shows a circuit arrangement modified compared to FIG. 1, FIG. ₀ 3 and FIG. 4, basic implementation possibilities. the invention to a cut perpendicular to the longitudinal axis NEN distributor,

FIG. 5 shows an embodiment that is structurally modified compared to FIG of the invention also at a perpendicular to the longitudinal axis cut distributor and. "

Figure "6 is a section along section line VI-YI in fig _0th Λ _β

According to FIG. 1, an ignition distributor 1, shown in its structural design, is in a coil ignition device chosen as an example housed, which is indicated in terms of circuitry, it is designed for a Zweizyiinderbrennkraftmaschine 2 and has two, each one of the cylinders assigned spark plugs 3 or 4 o The ignition distributor 1 is attached to the internal combustion engine by means of tabs 5 one of which is shown o The spark plugs 3 »4 are each with a connector to earth and the other connection to a fixed contact 6 or 7 of the ignition distributor 1 indicated> The two fixed *,. A contact arm 8 is assigned to contacts 6, 7, which is Insertion of an insulating piece 9 on a skin 10 of the ignition «· Distributor 1 sits o oils shaft 10 is, as with the striohpunktier «: th line 11 indicated, with the output 12 of the Brennicrafii = ' machine 2 coupled .. The contact arm 8 sitting on // line 10 is available via a contact spring 13 and a sliding contact14 with *

909849/0509 _8ΛΕ5 obWAL '^'

. ROBERT BOSCH GWBH R ₀ Hr * Θ764

. · '., Stuttgart 11/18/1966 left / sl

a connection of the secondary winding 15 of an ignition coil 16 in Ver <*> bindingο The other stop of the secondary winding 15 is common with one connection of the primary winding 17 of this ignition coil 16 to ground. laid «The other connection of the primary winding 17 is via a light-sensitive an electrical switching element 18 by a Be = » Drive switch (ignition switch) 19 to the positive pole of a power source

20 can be connected, the negative pole of which is connected to ground «is at the same time with the operating switch 19 also the circuit of a light source

21 can be switched on. In the event of a failure, a photodiode is used as the light-sensitive electrical switching element 18 and a photodiode as the light source 21 Incandescent lamp instead of the photodiode can also be used, for example a phototransistor and a glow lamp instead of the incandescent lamp? an ionase radioactive diode or the like can be used »

If now the Betriebssohalter "19 is closed so the light source 21, the radiation illuminates ₀ Applies to the light-sensitive electrical circuit element 18, this" Schaltglled has a re »latiy low resistance value and it flows. High current through the primary winding 17 of the ignition coil 16. If, on the other hand, the beam path emanating from the light source 21 and directed at the switching element is interrupted at the ignition point, the resistance value of the switching element 18 rises very sharply, "which stops the ignition process". The sudden increase in the resistance value of the switching element 18 is approximately equivalent to an interruption of the circuit of the primary winding 17, so that a high voltage surge occurs in the secondary winding 16, which is caused by the contact arm 8 via one of the two contacts 6 or 7 one the two spark plugs 3 or «4 is fed and caused an electrical flashover (ignition spark) there,

ITm now for the structural arrangement of the light source 21 bsw «des light-sensitive electrical switching element / to be able to choose a place where neither heat nor vibration effects of the fire engine 2 has a detrimental effect on these switching elements exercise "is the radiation of the light source 21 according to the invention

ROBERT BOSCH GMBH RoNr ₀ 8764

Stuttgart. . 18. »11β1966 Li / Si

With the help of a light guide 22 directed to the light-sensitive electrical circuit element 18 = »In the example, the ignition device should be intended for an internal combustion engine that drives a motor vehicle so that the light source 21 and the light-sensitive electrical retaining element 18 are expediently attached to the body wall 25 which delimits the engine compartment The light guide 22 can, for example, be a mirrored channel or a light guide rod, preferably in a flexible design The component 24 moves alternately with a transparent section a and an opaque section b through the beam path, namely at an intersection 25 of the light guide 22 _O Eisylinderbrennkraftmasch.ine, two translucent sections a and lawei lichtuhduröhläeaigQ 'sections b are provided in the component 24' SJ The two- 'tTorbrechungsendexi 22 *' and 22 * * at the interruption atelle 25 of the light guide'22 are facing each other * The interruption end 22 'assigned to the light source 211 sits firmly in the housing wall of the divider 1 _f whereas - that of the switching element 18 ΧΙη-ίίβ-ρΐΐΓΘοΑαΐΐδΒβΜβ 22 ″> through the gray housing wall 26

1 hindar Gh and by means of a clamp 27 · fixed on a carrier plate i 28 let * - lie carrier plate: 28 is ^ "mounted on the ver %% iierwelle 10, but - not with this twisting -

If necessary, the carrier plate 28 has a lower known per se. druclcveÄteÄvo ¥ riön ^ timg; ^; 29 * -aur ^: - automatic regulation of the, ignition ^ - timely zugeortinei "· # β4Α * Aüßerdete" also exists _.; Die..Ilögiichkelt; zvvischeii dem Baiiteil-2Φ-'und be = lcö'tiiite'i 'schemä ^ tiöiili ang ^ deü-tet © flieMcraftverstellvorriehtung ^ 30 .., · also zwt ■ ■ pe-Ibsttätigeii' B «gtilic-.rung; ... des: Zündaeitputiktes y

¹¹ ·, 909849 / 05O ₉ ' _BAD original

■■ ... 8 -

ROBERT BOSCH GMBH R ₀ Ir ₀ 8764. ''

_v Stuttgart 18 _a 11o1966 Li / Sl

To focus the .Strahlung before the interruption end 22 ^{9 of} the light guide 22 a lens 31 is provided lens 31 ferst mechanically connected to a sickle-shaped adjusting part 32 ,, the toothing 52 ° has (Figo 6) the _n Yerst.ellteil is together with the lens 31 mounted in a projection. 33 of the G-ehäusewandi 26 of the Züiadvertei »iera 1 and a« tea hits! -34- by a "Yenaahaung 35" provided in the outer surface of the carrier plate 28 depending on the underpressure fouling in the corresponding © !! sense,

Further eo empfiolilij siolu that region within manifold dee _"f in the housing is effected, the influence of the radiation and hence optically effective parts are" by covers 36 against dirt su sichernc

In the embodiment just described, the beam path is interrupted at the point of ignition by the component 24 offset by the internal combustion engine In the case described, the sections b of the component 24 would then be translucent and the sections a impermeable to light "shows? with its connection on the ane4side to ground, and with its em on the cathode-side via a resistor 3t and a limiting resistor 38 communicates; the operating switch 19 can be connected to the positive pole of the power source 20 _e The negative pole of the power source 20 is connected to Masae .; In addition, with the operating switch 19 ', the circuit from "belDplele ^ eiss al s incandescent lamp running

_S 9 p 9 8 4 9/0 S 0 9

<■ = »4 = 3

• ROBERS-BOSCH GMBH RoNr * 8-64

Stuttgart. 19έ11 · 1966 I »i / Sl

Light source 21 closable, "Parallel au resistor 37 is the base-emitter path of a npn ~ switching transistor 4O ₉ has its collector through the primary winding 17 of the ignition coil 16 with ground connection ₀ The circuit of the secondary winding 15 of the ignition" coil 16 ist.der same as "in Pig". 1 and therefore not presented and explained again.

If the operating switch 19 is inserted and the beam path emanating from the light source 21 "directed to the light-sensitive electrical switching element 18 is interrupted, the switching element 18 has a / high resistance;" that the base of the switching transistor 40 via the resistors 37 _P 38 with respect to the emitter has a positive potential, nit <, X) emzufoige the emitter collector "S track of the switching transistor 40 is conductive and the circuit of the primary winding 17 is closed. If, on the other hand, the beam path is released at the time of ignition, then the resistance value of the switching element 18 falls so sharply as Sb ₉ . that the base of the switching transistor 40 now receives a negative potential in relation to the emitter o As a result, the emitter "collector" = circuit is blocked and the circuit of the primary winding - interrupted, whereby, as already described by Pig ",? an ignition spark occurs

The influence of the light source 21 with the help of the light conductor 22 on the light-sensitive electrical switching element 18 can also take place in the manner «- as can be seen in principle from fig» 3 »- the interference 22% 22" of the light guide 22 both sit opposite each other in the housing and 26 of the ignition distributor 1 ". The beam path runs at the interruption point 2%, that is, inside the ignition distributor housing according to an imaginary line of the circular housing cross-section" If we assume that the ignition device for a two-cylinder ^^ Brennkrafitma ». if they are used and the triggering of the ignition process is to take place by releasing the beam path, that is from

ä098 /, 9 / 0B09 _R4nOR1B1NAL "ro

ROBERT BOSCH GMBH RoNr ₀ 8764

\ "» Stuttgart 18 * 11.1966 Li / Sl

the internal combustion engine moving component 24 with four translucent

casual sections a, and correspondingly with four opaque Guide sections b through the beam path <> There are two sections each of the four translucent sections a assigned to each other The two assigned Lichtäua »ch <= Läseigen sections a are arranged so that one of these Sections a with the lower end 22 ° and the other with the Interrupting end 22 "of the light guide 22 can align ν ^ This the beam path becomes twice for one revolution of the component 24 released and in each of the two cylinders of the internal combustion engine There is an ignition spark on the corresponding spark plug 3 or ^ 4 (Figot generates »Should the triggering of the ZÜnd in the last described case« If the process is carried out by interrupting the beam path, the opaque sections b must have that arrangement ^ which have the translucent sections a «.

If necessary, the lens can also be used in such an embodiment 31 for focusing or correcting the direction of the radiation

If the component 24 is provided with a fan assembly 41 known per se and the light guide 22 is formed as a mirrored waveguide _9, it is possible to achieve "that an air flow passes through the light guide during operation," removes the dust from the optically active parts and at the same time for cooling in particular the light-sensitive electrical switching element 18 can be used

In the embodiment principle shown in FIG. 4, the radiation emanating from the light source 21, with the aid of the light guide 22, is influenced by reflection at the light-sensitive electrical switching device 18. © iö ünterbrechifagsenden 22% 22 "sit, both in the housing walls 26 of the ignition distributor 1 in such a way ¹ that the beam path enter .. the interior of the ignition distributor housing and through fl

'[' 909849 / 05Q9

■ - '■ .. = 11

ROBERT BOSGH GMBH R ₀ Ur ₀ 8764

Stuttgart 18th century 11 β T966 Li / Sl

tion can emerge again at an angle © £ _'o Under eggs An = -. would take _f that the ignition device for a two-cylinder internal combustion == machine designed and ZÜrd process were to release duroh the beam ienganges triggered iet ^ is the reflectance in the present case, dur (3h ewei light-reflecting sections c causes "which by means of the component 24 moved by the internal combustion engine through, the apex is passed through the angle oC and thereby sweeps the sub-section menu 22% 22" double light guide 22 eyes "with its reflective slat," one of these two light-reflecting sections u ia% of one of the two spark plugs 3 or "4 (Fig« 1} associated and passes thus on rotation of the member 24 are each in the ignition timing of the corresponding candle 3 or "4 in the apex" region of the Winkele u. ■> the light reflektier The end of section e can sometimes be an example or a priama

If, in a modification of the Aueführungebeispiels of FIG ₀ 4 From the "solution, effected ignition process by interruption of the beam path, the portions above of a light does not produce re = inflecting material _or until further notice at the Unterbreehungs ^endeii-22? _r 22 "exposed surface to be covered with such a material. and. the."

· ..-; -.- '■ ·> - ■■■■■ "- .. as' ■■■■

Also ■ -recommends / see _; innen.-.an the Gehäuaewand 26 Zündver dee "tellers -1 Bür a" te voi'ausehen 42 which extends "ü reflecting portions in the region of the light and any of you Ver" schmutzungeii abstreicht ο Also, on which the Bronnteraft »mas.chlnö bevie ^ teii component. 24 a brush or the like, which is not normally used in the present case, is provided, which during operation is guided over the interrupting areas 22 ° - "22" of the light guide 22, which is designed as a light guide.

90 984 970509 ORIGINAL BATHROOM

ROBERK BOSCH (JRlBH RoNr ₀ 0764

Stuttgart ■■. ■■■ 18cIU1966 Li / SI

5 aelgt a structurally modified version compared to Figo 1.? by daa photosensitive electrical switching member 18 heat Feist accordingly selected and given to the carrier plate 28 = optionally is fixed with the interposition of an elastic or _D wärmeiaolierenden intermediate piece 43 ₀ The light source 21 befin contrast "· is determined for an optionally ffiaseepotentiäl having holding part 44? that elastic in the example case by means of springs 45 "is attached to the outside of the housing wall 26 of the ignition distributor 1" so that the vibrations of the internal combustion engine can be kept away from the light source 21, which is designed for example "ala incandescent lamp" 22 directed at daa switching element 18 The light guide 22 is now sitting "with its end opposite the switching element 18 in the housing = wall 26 of the ignition distributor Io Analog, it is also possible, the light source / elastic on the carrier plate © 28 and the switching element 18 on the To fasten the holding part 44, although the realizable according to Fig. 5 also make it possible to dispense with a light guide between the light source 21 and the switching element 18, if the radiation is through a light guide, there is a greater battery life 22 is directed exactly to the switching element 18. _c

The invention is of course / limited to the application in coil ignition devices, but also suitable for use in eator ignition devices when the discharge of the storage capacitor and consequently the initiation of the ignition process with the aid of a light source and a light-sensitive electrical switch basking-gliedea be made 'should read further can' invention there findsia use ,. where the distributor is replaced by electric switching elements which -are controllable by .Lichtstrahlen * Finally, the moving of the internal combustion engine component 24 · did not measure necessarily the '.'felle. 10 dea- ignition distributor 1 sit ^ but can also be a component combined, for example, with the flywheel of the Eremi-KraftmaBChine Law> the flywheel itself

^ßGi71 '' 909849/0509

ROBBRI BOSCH GMBH ■ R ₀ Wr ₀ 8764

Stuttgart 18o11 »1966 III / Sl

Pernsr Confesses certainly also the possibility of the measures according to the invention not only alone for triggering the Züridvorganges but suaätzlich noeh to control in connection therewith ate "budding Funktionavorgänge such _{ö ö} B of Benzineinapritaung" apply "

■ 9098A9 / 0509

Claims (1)

ROBERO! BOSCH GMBH A <LR ₀ No. ₀ 8764 • / Stuttgart '18.11 _B 1966 Li / Si EXPECTATIONS Electric ignition device for internal combustion engines, the minimum Contains a light source whose radiation is directed to a light-sensitive electrical. Switching element directed and to Triggering of the ignition process is exploited, characterized in that that the radiation from the light source (21) with the aid of one Light guide (22) on the light-sensitive electrical switch " member (18) directed and known per se, / eise by a component (24) moved by the internal combustion engine (2) can be influenced, 2n Electrical ignition device according to claim 1, characterized labeled in = · characterized in that da3 running of the internal combustion engine (2) moved member (24) a rotating movement and in the ignition timing = · _o release point for the interruption or the guided through the light guide (22) beam path _{0 is used} Electrical ignition device according to Claims 1 and 2, characterized in that the component (24) moved by the internal combustion engine (2) is ^{guided through the beam path in the area between: the} light source (2t) and the beam entrance of the light guide (22) Electric. Ignition device according to claims 1 and 2, characterized in that indicates that the component (24) moved by the internal combustion engine (2) in the area between the light-sensitive elec · « tric switching element (18) and the. Radiation exit of the light = ! another (22) is guided through the beam path " 5ο Electrical ignition device according to claim 1 and 2, characterized ge * = ... indicates that the light guide (22) is interrupted and let und.dae Component (24) moved by the internal combustion engine (2) in the area. the crossing point; (25) guided through the beam path 909849/0509 ROBERT BOSCH GMBH . RcNrο 8764 Stuttgart / 5 "18, 11, 1966 Li / Sl 6- Electrical ignition device according to one of claims 3 to 5 _? characterized in that at least one light-permeable section (a) and an opaque section (b) of the component (24) moved by the internal combustion engine (21) are alternately guided through the beam path Tn Electrical ignition device according to one of Claims 5 to 5%, characterized in that the component (24) moved by the internal combustion engine (2) has at least one light-reflecting section (c), with the aid of which the beam path can be steered onto the line-sensitive electrical switching element (18) is* 8γ Electrical ignition device according to claim 6 or I _9, characterized ^ that there is at least one lens (31) in the beam path. Ir. Electrical ignition device according to Claim 8, characterized in that that the position of the lens (31) is determined by the ignition point self-regulating device (29) Can be changed - - Ο- üJlektrische- ignition device according to claim 6 or 7 "characterized ge" that during operation per se known means (42) srui ¹ cleaning, such as ζ-, Β * one or more brushes _t over the optis.olfaktiv- ßanujii parts are guided- i ^J ^ Electrical ignition device according to claim 6 or 7, characterized ge ^ · denotes t o.aß the BEV of the internal combustion engine (2) / EGTE construction "= part (24) is-known-means (41) for generating a stream of air is provided, which is guided through the light guide designed as a mirrored waveguide (22 ^, - Electrical Zrütiaoineinrichtung according to claim 6 or 7 "thereby ge ~" coin! Huet _f ■ π S the optie.ch -effective; parts by 'I' covers (30 y ίτβι en Vc5 '.'<CLmutCung gesc / jotzt sincL BAD ORIGINAL 9 0 9 8 A 9/0 5 0 9 ROBERT UOSCH GMBH., H ₀ Hr ₀ 8764 Stuttgart. Jffa 18o11 ₃ 1966 U / Si 13 « h? Octagonal ignition device according to claim δ or 7 * characterized in that the component (24) moved by the internal combustion engine (2) is positioned on the level (10) of an ignition distributor (1) 14 Electrical ignition device according to claim 13 , characterized in that the Li-chi source (21) and / or the light-sensitive oil supply element (18) is elastic on the, for example, "in the ignition distributor";"1) attached l 9098A9 / 0509 Empty soap