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Fuel injection nozzle

A technology of fuel nozzle and nozzle needle, which is applied in the direction of fuel injection device, fuel injection device with measures to reduce wear, charging system, etc.

Inactive Publication Date: 2016-01-13
MAN ENERGY SOLUTIONS SA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Furthermore, in the known fuel nozzles, the conically contoured surfaces of the nozzle body and the nozzle needle have to be produced with a high surface quality, resulting in high manufacturing effort.

Method used

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  • Fuel injection nozzle
  • Fuel injection nozzle
  • Fuel injection nozzle

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Experimental program
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Embodiment Construction

[0016] The invention relates to a fuel nozzle for an internal combustion engine, especially a marine diesel internal combustion engine. The fuel nozzles may be fuel injectors.

[0017] figure 1 A cross-section through a fuel nozzle 10 according to the invention is shown, wherein the fuel nozzle 10 has a nozzle body 11 and a nozzle needle 12 located in the nozzle body 11 . The nozzle body 11 provides a valve seat 13 for the nozzle needle 12 serving as a valve body, wherein the elastic element 14 presses the region 15 of the nozzle needle 12 against the valve seat 13 provided by the nozzle body 11 when the fuel nozzle 10 is closed. When the nozzle needle 12 is pressed with its region 15 against the valve seat 13 provided by the nozzle body 11 with the fuel nozzle 10 closed, fuel cannot be injected through the so-called nozzle opening 16 of the nozzle body 11 . Only when the nozzle needle 12 with its region 15 is lifted from the valve seat 13 of the nozzle body 11 can fuel be ...

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PUM

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Abstract

Fuel injection nozzle of an internal combustion engine, comprising a nozzle body (11) and a nozzle needle (12) located in said nozzle body (11), the nozzle body (11) providing a valve seat (13) for the nozzle needle (12) that serves as the valve body, such that, when the fuel injection nozzle is closed, a region (15) of the nozzle needle (12) pushes against the valve seat (13) provided by the nozzle body (11). The valve seat (13) provided by the nozzle body (11) has a conical contour and the region (15) of the nozzle needle (12) which pushes against the valve seat (13) provided by the nozzle body (11) when the fuel injection valve is closed is provided by a spherically contoured section (17) of the nozzle needle (12).

Description

Field of Invention [0001] The invention relates to a fuel nozzle according to the preamble of claim 1 . Background technique [0002] Fuel nozzles are well known from practice. In this way, the fuel nozzle, which can also be embodied as a fuel injector, has a nozzle body and a nozzle needle located in the nozzle body. The nozzle body provides a valve seat (Ventilsitz) for the nozzle needle used as a valve body (Ventilkörper). With the fuel nozzle closed, a region of the nozzle needle is pressed against the valve seat provided by the nozzle body. With the fuel nozzle open, this region of the nozzle needle lifts off the valve seat of the nozzle body. [0003] In the fuel nozzles known from practice, not only the valve seat provided by the nozzle body but also the region of the nozzle needle which presses against the valve seat of the nozzle body when the fuel nozzle is closed have correspondingly conical contours, ie have different contours. cone angle. [0004] In the fu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F02M61/18F16K1/36F16K1/42
CPCF02M61/188F02M61/1886F02M61/1893F02M2200/02
Inventor M.因德里希S.柯恩T.克劳亚A.庞普斯H.沙尔
Owner MAN ENERGY SOLUTIONS SA