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Injection nozzle for fuel

A nozzle and fuel technology, applied in fuel injection devices, special fuel injection devices, charging systems, etc., to achieve the effect of reducing wear

Inactive Publication Date: 2012-04-04
WAERTSILAE SCHWEIZ AG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At this point the temperature in the combustion space may have dropped such that it is no longer sufficient for complete combustion

Method used

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  • Injection nozzle for fuel
  • Injection nozzle for fuel
  • Injection nozzle for fuel

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Experimental program
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Embodiment Construction

[0024] figure 1 A longitudinal section through a conventional nozzle 10 for injecting fuel in diesel engines, in particular two-stroke large diesel engines, is shown. The nozzle 10 comprises a nozzle holder 1, a nozzle body 2 with a cylinder hole (or a cylindrical hole), and a nozzle tip 3 with a longitudinal hole 5 and a nozzle opening 4 starting from the longitudinal hole for injecting fuel into the combustion space of the diesel engine. The nozzle 10 also includes: a piston 8 that is movably arranged in the cylinder seat (or cylinder seat); figure 1 Valve needle 6 in the shown nozzle; Valve seat 7 arranged in the extension of valve needle 6; Push rod 11 arranged in the extension of piston 8; Compression spring 9, the spring force of which is via the push Rod 11 transmits to piston 8 . As long as the combustion pressure acting on the nozzle is low, the valve needle 6 connected to the piston is thus pressed against the valve seat 7 , thereby interrupting the fuel supply ...

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PUM

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Abstract

This invention is related to a fuel spray nozzle, specifically, providing a spray nozzle for diesel engine, especially spraying fuel in two-stroke large-scaled diesel engine. The nozzle comprises a spray nozzle body (2) and a nozzle head (3) connected to the spray nozzle body. The nozzle head comprises a longitudinal bore (5) and one or more nozzle openings (4.1, 4.2) originated from the longitudinal bore so as to spray the fuel to the burning space of the diesel engine. The nozzle further comprises a valve needle (6) installed in the nozzle body (2) and a valve base (7) matched with the valve needle so as to control the fuel supply to the longitudinal bore (5) and nozzle openings (4.1, 4.2). Slide valves (14, 14') are additionally installed in the longitudinal bore of the nozzle head (3)so as to open and close nozzle openings (4.1, 4.2). And the slide valve is provided with actuators (8.2, 9.2, 15) thereof so as to operate the shift of the slide valves(14, 14') corresponding to thevalve needle (6).

Description

technical field [0001] The invention relates to a nozzle for injecting fuel in a diesel engine, and to a diesel engine, in particular a two-stroke large diesel engine with at least one such nozzle. Background technique [0002] In some diesel engines, especially two-stroke large diesel engines of conventional configuration (such as those used in ships and power stations), nozzles are used, the nozzles include a nozzle body and a nozzle head connected to the nozzle body, the nozzle head has A longitudinal hole and one or more nozzle openings originating from the longitudinal hole for injecting fuel into a combustion space provided in the diesel engine. The nozzle also includes a valve needle arranged in the interior of the nozzle body, and a valve seat cooperating with the valve needle to control the supply of fuel to the longitudinal bore and the nozzle opening. [0003] The valve seat of the fuel nozzle is generally located away from the one or more nozzle openings, since...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F02M61/06F02M61/10F02M61/12F02M61/16
CPCF02M45/086F02M2200/46F02M63/0047F02M63/0028F02M61/1806F02M61/20F02M53/043F02M2200/29F02M61/042F02M63/004F02M61/18F02M61/16F02M61/10
Inventor R·舒尔茨
Owner WAERTSILAE SCHWEIZ AG