DE6607982U - INJECTION COMBUSTION ENGINE. - Google Patents

Description

76 766 / 46C • ····· ..! / Gbm 91
.7. 99
1968 Ka * · .. I! '... *: (Q / Km B. R.
i 25

Annex to the utility model aid ssrmieldung

ROBSHT BOSCH GIiBH, Stuttgart

The invention "relates to an internal combustion engine Manifold injection device with preferably electronic Control, with at least one injection valve, duty cycle required fuel metering.

In internal combustion engines, it is necessary that xianr ^ nci. ces Starting process, especially with a cold start, an increased fuel amount is injected into the intake pipe or pipes of the internal combustion engine.

There are internal combustion engines with electronically controlled Spray devices known in which the Mehrinenge thereby it was achieved that the all-out process; the opening time of the injector it is lengthened, thereby reducing the

660798219.5.71 ~ ² '

Robert Bosch GmbH _{Ώ ninn Vr} . / _v

Stuttgart ^{R 91} " ^{Ka / Km}

The amount of fuel reaching the intake manifold during the individual injection processes is increased.

However, complex circuitry measures are required for this purpose required and the production of the system is disproportionately expensive. The Additional amount can be achieved at the start that according to the invention An electromagnetically actuated auxiliary valve that injects into the intake manifold is provided as a starting aid.

Further details and advantages of the invention emerge in connection with the subclaims from the following description of an embodiment and from the accompanying drawings.

Show it:

Pig. 1 the top view of the auxiliary valve in partially sectioned depiction

Pig. 2 shows a section of the auxiliary valve of a fuel injection system Fig. 3 Eiseii cross section of the magnetic core sit SüsenkÖi-ger ^

Inside a coil IO is a substantially cylindrical one Armature 11 guided in the bore 12, the armature protruding about 1/3 beyond w the coil. The anchor has planar surfaces on its circumference 13 or longitudinal grooves for the fuel flow. Another possibility for receiving the armature 11 is to drill the hole 12 longitudinal ribs are to be provided which are cylindrical in this pail Anchor.

On dea anchor 11 is made of hociisrärinef estern plastic In an axial plan view, square disk 14, the edges 15 of which cause the disk 14 to be flushed in the bore 12. A helical compression spring 16, against which the armature 11 works, is arranged within the armature 11. The compression spring 16, the rests with one end of the armature 11, is supported with hers the other end on a magnetic core 17 which has a transverse bore 18

Robert Bosch GmbH _{B Q1QQ}

Stuttgart ^{R '91} "

and a longitudinal bore 19 door has the fuel supply to the actual nozzle 20, which is arranged in a nozzle body 31 composed of two parts. The Eohrungßdiameter are determined so that the necessary feed cross-section is exceeded Uüd öisse Behrunges smoothly sXs KrsfistnfXrgseryair this, can. Subsequent to the longitudinal bore 19, a cylindrical cavity 21 is arranged in the nozzle body 31, to which fuel supply bores 22 lead, which open eccentrically, preferably tangentially, into this. At the lower end of the cavity 21, the nozzle 20 is arranged. The magnetic core 17 just described in its structure is held in a flange 23, which is used to attach the valve ^ for example to the intake manifold of the internal combustion engine. The housing 24 made of iron pipe is attached to the plansch 23 and surrounds the coil and partially the power connection parts molded with synthetic resin 29, the fuel supply and discharge lines being contained in the synthetic resin compound.

The mode of operation of this auxiliary valve is as follows: If voltage is applied to the coil 10 via its connection terminals, the armature 11 is drawn against the magnetic core 17. The magnetic circuit of the valve is created by the armature Π _5, the magnetic core 17j, the puddle 23 and. the housing 24 is formed.

When the armature 11 is tightened, the fuel pressure pushes the disk 14 off an annular bearing surface 26 and the fuel guided in a fuel line 27 reaches the cylindrical outlet 12 via a bore 2S. Fuel flies along the plane surfaces 13 to the magnet core 17 and succeeds Via its transverse and longitudinal bores 18 and 19 and via the bores 22 into the cylindrical cavity 21 of the nozzle body 31. The eccentric or tangential arrangement of the bore 22 causes the fuel in Hohlraxaff "" 2T to rotate and exits finely atomized the nozzle 20 off. After the valve has dropped, ie vfeim. the opening flow through the winding 10 will -anterbrociien, the spring 16 presses ir.it the armature 11, the disc 14 against iiire

660798219.5.71 ~ ⁴ ~

Robert Bosch GmbH E. 9199 Ka / Km

Stuttgart

Support surface 26 and blocks the further supply of fuel. Nevertheless, fuel can still be sucked into the suction pipe from the cavities of the valve, mainly from the longitudinal bore 19 and the inner space: 30 of the compression spring 16, so that an excess amount of fuel is available for a certain period of time after the start-up . How long this amount of fuel can still be supplied after the valve is closed is determined by the size of this fuel reserve, which is mainly formed by the bore i * j and <2en inside 30 of the compression spring 16.

In addition, there is also the possibility of the valve with a delay device, For example, to provide an electrical delay switch, whereby the valve also after the starting process is open for a desired time.

The particular advantages of this valve are that it is simple, uncomplicated Structure and inclusion of the housing 24 and the Flange 23 in the magnetic circuit. Veiter, the auxiliary valve is suitable for connection to an existing fuel supply ring line. It has also proven to be particularly advantageous that the i.e. when the valve is de-energized, it can still be sucked in again and ensuring that the internal combustion engine runs automatically Fuel finehrnen ^ c by the size of the bore 19 and the remaining cavities can be determined. This allows extensive Schaltune.Minaßnahir.en are waived. Even with delayed shutdown can run the delays .; «Setup is very simple, for example by. Connect a capacitor to the terminals of the Starthilfnve-ntils be built up.

Claims (1)

1. Srermkraftnaschine with an intake manifold injection device with preferably electronic control, with at least an injection valve which metering the fuel flow required per working cycle, characterized in that as Starting aid an electromagnetically actuated auxiliary valve projecting into the intake manifold is provided. 2. Internal combustion engine according to claim 1, characterized in that that an auxiliary valve v. 'is continuously open during the starting process is. 3. Erermkraftaaschiike according to claim 1, dadvirch characterized, that the auxiliary valve is controlled by a delay switch which opens the auxiliary valve after the start process stop. 4. Internal combustion engine according to claim 1, characterized in that the auxiliary valve during the starter. ^ It before applying. el eVtrischer. Pulses is open. Tre: incremental machine according to one of claims 1 Vis 4> thereby ^ ey.c ^ r.fiic ^ net). that the vots auxiliary force to be injected r ^J .:. ^: ' ^- P'.io der zur. cicer.lichen injection valve leading Zuej.fbar int. j :; -2- Robert Bosch GmbH -2- R. 9199 Ka / Kk Stuttgart 6. Internal combustion engine according to claim 2 or 4, characterized in that that the auxiliary valve is still arranged after the closing member (14) by the size aer after closing Cavities, especially the bores (19.30) bectiimte Kenge supplies fuel to the intake manifold. 7 »Internal combustion engine according to one of claims 1 to 6, characterized characterized in that the auxiliary valve with a mounting flange (25) and a housing (24) made of magnetically conductive Material is provided. 8. Internal combustion engine according to claim 7> characterized in that the magnetic circuit of the auxiliary valve via the housing (24), the mounting flange (23), the magnetic core (17) and con AnVer (11) 9. Internal combustion engine according to claim 8, characterized in that the armature of the auxiliary valve in the axial direction by approximately 1/3 beyond the bobbin. 10. Prer.rV.raftraschine according to Αϊ.Such 9 _5, characterized in the essential, sylir.drisehe Aryans (11) on his F .r.tclflac ^ .e Flanflnc ^ rr. (IJ) oufKeift, the cen flow of the fuel to DÜBenK'rr * -r (14) crrönlichen * 11. Prenr.V.raft machine r.ocb claim 9j characterized thereby, caß the anVer has a cylindrical shape ur.d in a -3- Robert Bosch GmbH -3- R. 9199 Ka / Kk Stuttgart is guided with longitudinal ribs bore. 12. Internal combustion engine according to one of the preceding claims, characterized in that as the closing member of the auxiliary valve a plate (14) is ws sent Heikes more rectangular Base and top surface is provided, the edges of the plate for guiding the closing member in the longitudinal bore (12) serve. 13. Internal combustion engine according to claim 12, characterized in that the, preferably made of highly heat-resistant plastic produced plate (14) presses in the closed state against an annular bearing surface (26) and in the open state stands out from this. 14. Internal combustion engine according to claim 13, characterized in that that the nozzle body (17) has a cylindrical cavity (21) to which eccentrically, preferably tangentially in These opening fuel lines (29) lead v; o through the fuel exits the nozzle (20) with a twist. 1 ^ - 3 reriiikreitnasciiine according to one of the preceding claims, cacurch nekermsrSchnell that the electrical connections (25) are CtT Sp "t; Ie with synthetic resin" unspritst, wherein the Einist— r * srz33se-e cie Eraftrtoffzu— and acleitiiHgen are included. 6 € 07382is.5.? I