PL31376B1

PL31376B1 -

Info

Publication number: PL31376B1
Application number: PL31376A
Authority: PL
Filing date: 1939-06-14
Publication date: 1943-01-30

Description

KI. 4&£v-«4 Mc, *%£ Wynalazek dotyczy zaworu wtryskowe¬ go, zwlaszcza do silników spalinowych, po¬ siadajacego otwierajaca sie w kierunku wtrysku, prowadzona na pewnej dlugosci w opirawie iglice, na której koncu przeciw¬ leglym wtryskowi dziala sprezyna na grzy¬ bek zaworowy, zamykajacy przekrój wtry¬ skowy.W znanych zaworach wtryskowych tego rodzaju zdarza sie w razie zlamania sie iglicy, zwykle w najslabszym jej miejscu, ze dolny odlamany koniec spada do komo¬ ry spalania silnika i wywoluje tam uszko¬ dzenia, Wade te usuwa sie w mysl wyna¬ lazku w ten sposób, ze najmniejszy prze¬ krój nadiaje sie iglicy pomiedzy czescia prowadzona^w jej oprawie a oparciem dla sprezyny zamykajacej oraz ze pomiedzy tym najslabszym miejscem a czescia pro¬ wadzona znajduje sie wystajaca pofca sred¬ nice wrzeciona nasadka, która w razie zla¬ mania sie iglicy w najislabszym miejscu za¬ pobiega wypadnieciu ulamanej prowadzo¬ nej i uszczelniajacej czesci iglicy z jej oprawy.Na rysunku pokazano przyklad wyko¬ nania przedmiotu wynalazku w przekroju podluznym.Cyfra la oznaczono podstawe oprawy iglicowej 1. W oprawie tej miesci sie iglica 2, posiadajaca na jednym koncu grzybek zaworowy 3. Na drugim koncu, iglicy po stronie przeciwnej wtryskowi opiera sie o jej wystep 5 talerzyk 7 sprezyny za po¬ srednictwem posredniego pierscienia 6.Sprezyna 8, oparta pomiedzy czolowa po-wierzchnia 9 oprawy iglicowej 1 i kolnie¬ rzem 10 talerzyka 7, naciska iglice zaworo¬ wa 2 w kierunku przeciwnym wtryskowi i utrzymuje zawór zamknietym. Przy ze¬ stawianiu zaworu wprowadza sie iglice 2 od strony wtryskowej do oprawy zaworu 1, nastepnie nasuwa na iglice 2 z drugiej strony pierscien 11, który zaskakuje w wy¬ zlobienie 12 iglicy. Tuleja 7a, stanowiaca wydluzenie talerzyka 7, posiada rozszerze¬ nie 13, które obejmuje pierscien lii zabez¬ pieczal gO' w ten sposób od zsuniecia sie z powierzchni iglicy. Stozkowe rozszerze¬ nie 14 w oprawie iglicowej l, w przypadku pekniecia iglicy 2 w najslabszym jej miej¬ scu, to jest w wytoczeniu 4, zatrzymuje pierscien 11 iglicy, opadajacy w kierunku wytrysku, i zapobiega przedostaniu sie ula¬ manej czesci iglicy do przestrzeni spalania. PLKI. The invention relates to an injection valve, in particular for internal combustion engines, which has an opening in the direction of injection, guided over a certain length by a needle, on the end of which a spring acts on the opposite side of the injection. valve plug closing the injection cross-section. In known injection valves, it happens in the event of a needle breakage, usually at its weakest point, that the lower broken end falls into the combustion chamber of the engine and causes damage there, Wade these are removed in the context of the invention in such a way that the smallest cross-section is given to the needle between the part guided in its housing and the support for the closing spring, and that between this weakest point and the lead part there is a protruding diaphragm the spindle an attachment which, in the event of a needle breakage at its weakest point, prevents the broken, guided and sealing part of the needle from falling out of its holder. and the subject of the invention in a longitudinal section. The number denotes the base of the needle mount 1. This mount houses a needle 2 having a valve plug at one end 3. At the other end, the needle on the side opposite to the injection rests against its protrusion 5 plate 7 of the spring by By means of the intermediate ring 6, the spring 8, resting between the face 9 of the needle mount 1 and the collar 10 of the plate 7, presses the valve needles 2 against the injection direction and keeps the valve closed. When the valve is folded up, the needles 2 are inserted from the injection side into the valve holder 1, then the ring 11 is slipped over the needles 2 on the other side, which snaps into the groove 12 of the needle. The sleeve 7a, constituting an extension of the plate 7, has an extension 13 which encloses the ring and prevents it from sliding off the surface of the needle. The conical expansion 14 in the needle mount 1, in the event of a breakage of the needle 2 at its weakest point, i.e. in the recess 4, stops the needle ring 11 falling in the direction of ejection and prevents the sloped part of the needle from entering the combustion space. . PL

Claims

Claims 1. An injection valve, especially for internal combustion engines, having a needle opening in the direction of injection, guided for a certain length in a housing, on the end of which, on the side opposite to the injection, a spring is activated, which seeks to close the injection section by by a valve disc, characterized in that the said needle has the narrowest cross-section between the part guided in the housing and the rest for the closing spring, and is provided between the weakest point and the part guided on an acre larger than the needle diameter, preventing the needle from breaking at its weakest point falling out of the base of the broken part, guiding and sealing the needle.

2. The valve according to claim 1, the needle of which is inserted into the valve housing on the injection side, characterized in that the needle base is a ring, preferably resilient, slid over the needles from the end opposite to the injection side,

3. A valve according to claims 1 and 2, characterized in that the opposite side of the injection side of the guide hole in the needle holder is conically flared and sticks in the event of breakage of the needle ring.

4. The valve according to claim 1 and 2, characterized in that the part of the needle protruding from its mount on the side of the spring is located in a sleeve whose opening at the end facing this mount is widened and covers the rings with this expansion. spring-loaded, securing it against sliding off the needle.

5. The valve according to claim A method as claimed in claim 4, characterized in that the sleeve is one piece with the spring support plate mounted on the needles. Robert Bosch G. m. B. H. Zastepca: Eng. Cz. Raczynski patent attorney Staatsdruckerei Warschau - Nr. 11332-43. To the patent description No. 31376 3 PL