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Injector for internal-combustion engine

A technology for injectors and internal combustion engines, used in fuel injection devices, special fuel injection devices, machines/engines, etc., can solve problems such as the adverse effect of nitrogen oxide emissivity, and achieve reduced impact, easy disassembly, and minimized action leakage Effect

Inactive Publication Date: 2007-11-07
MAN B & W DIESEL AS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But this effect is very important for nitrogen oxide emission rate (Emissionsrate) (NO X emissivity) adversely affects

Method used

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  • Injector for internal-combustion engine
  • Injector for internal-combustion engine

Examples

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Embodiment Construction

[0032] The invention is described below with the aid of FIGS. 1 and 2 .

[0033] FIG. 1 shows a cross-sectional view of a novel injector 1 . The fuel under pressure is initially located in a pressure accumulator 13 , the so-called rail. The fuel is fed to the control piston 9 of the 3 / 2-way valve 8 via the pressure line 14 (framed area). If the 3 / 2-way valve 8 is actuated and the control piston 9 is raised, fuel can be delivered via the pressure line 14 and via the pressure line 15 both to the upper pressure chamber 4 and to the lower pressure chamber 7 of the nozzle needle 2 . Fuel is delivered to the upper pressure chamber 4 in a throttled manner via the inlet throttle valve 11 .

[0034] The fuel is injected through a nozzle cross-section (not shown) into a combustion chamber (not shown). In this case, the nozzle needle 2 opens and closes the nozzle cross section. If the nozzle needle 2 moves upwards, the nozzle cross section is opened. The more the nozzle needle is mo...

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PUM

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Abstract

The invention relates to a marine diesel engine having a fuel injection jet (1) needle (2) that opens and closes a nozzle throat area. The needle has an upper pressure chamber (4) and a lower pressure chamber (7) for fuel under pressure. Fuel is delivered to both chambers from a pressurized reservoir (13) via a 3 / 2-way valve (8) thru a first fuel line (15) to both chambers. The upper chamber (4) also receives fuel via a second fuel line (16) and has a release-valve (17) that opens at a predefined pressure. The upper pressure chamber (4) has an integral fuel-feed throttle (11) and a discharge throttle (10).

Description

technical field [0001] The invention relates to an injector (Einspritzinjektor) for an internal combustion engine, in which a nozzle needle opens or closes a nozzle cross-section, wherein an upper pressure chamber and a lower pressure chamber are formed above the nozzle needle, the fuel being delivered under pressure To the pressure chamber, one of the 3 / 2-way valves delivers fuel from an accumulator through a first fuel line not only to the upper pressure chamber but also to the lower pressure chamber, and the upper pressure chamber through a second fuel The line is connected to a pressure-stabilizing valve, which opens at a defined pressure and thus relieves the upper pressure chamber. Background technique [0002] It is known from the prior art for injection systems to control the injection mostly hydraulically, for example via various switching valves, such as 2 / 2-way valves and / or 2 / 3-way valves. [0003] The use of such switching valves in the automotive sector is mos...

Claims

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Application Information

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IPC IPC(8): F02M47/02F02M47/06
CPCF02M47/025F02M63/0029F02M63/0045F02M63/0225F02M2200/28F02M47/02F02M61/00
Inventor L·迈尔H·雅尔辛
Owner MAN B & W DIESEL AS
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