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Fuel jetting nozzle for internal combustion engine

A technology for fuel injection devices and internal combustion engines, which is applied in fuel injection devices, fuel injection pumps, fuel injection control, etc., and can solve problems such as the loss of the piezoelectric element's working ability, and achieve reduced piezoelectric elements, small volume flow, and fast degree of effect

Inactive Publication Date: 2005-01-12
ROBERT BOSCH GMBH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Here, due to the ready-to-close force, part of the piezo element's ability to work is lost

Method used

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  • Fuel jetting nozzle for internal combustion engine
  • Fuel jetting nozzle for internal combustion engine
  • Fuel jetting nozzle for internal combustion engine

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Embodiment Construction

[0024] This kind of fuel injection that can be changed greatly with higher fuel injection pressure and less cost, especially the fuel injection device that can control the fuel injection timing and fuel injection quantity very precisely, is through a so-called common rail system (Common Rail System) -Rail-System) to achieve. It can provide other kinds of fuel high-pressure sources different from those given by the usual high-pressure fuel injection pumps, but here, the invention can be used not only for this so-called common rail system, but also for fuel injection pumps, where common rail system is better.

[0025] In Figure 1, in view of the common rail pressure supply system as a fuel high-pressure source, a high-pressure fuel reservoir 1 is installed, and a high-pressure fuel delivery pump 2 supplies fuel to the high-pressure fuel reservoir from a fuel tank 4 . The pressure in the high-pressure oil reservoir 1 is controlled by a pressure control valve 5 connected to a pre...

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Abstract

In a fuel injection device for internal combustion engines, provides fuel oil from the fuel oil high pressure source to the fuel injection valve (9), the fuel injection valve has a fuel injection valve controlling the oil injection (12) and a control chamber (25). The control chamber is confined by the movable wall (23) and includes an oil feed duct (726) and an oilout duct (29). A valve seat (39) is consituted at the oilout duct, the valve seat is controlled by the sealing surface (47) of the valve elements (44, 46), wherein, the high pressure fuel is supplied from the vertical pressure passage of one fuel injection valve to the oil feed duct. The fuel injection valve is made into multi-part, which includes the junction plane (60), the pressure passage leading to the junction plane and forming the oil feed duct (726) starting from the pressure passage inlet (61) of the junction plane, wherein there is a residual chamber (738) at the uppermost of the movable wall (721), at the end face of the hole (722) accomodating the movable wall and between the movable walls, the oil feed duct (726) opening thereinto.

Description

[0001] This application is a divisional application of a patent application with an application date of January 9, 1997, an application number of 97190454.5, and an invention title of "Fuel Injection Device for Internal Combustion Engines". technical field [0002] The invention relates to an oil injection device for an internal combustion engine. Background technique [0003] In this type of injection device known from GB-PS 1 320 057, the oil outlet passage from the control chamber leads to a collection chamber, which is connected to the pressure relief chamber by a forward pressure relief channel . At the inlet of the oil outlet channel to this collection chamber, a valve seat is provided for the valve element of the control valve, which has a piezo element as drive and is designed as a valve element with a conical sealing surface. This control valve fulfills the function of controlling the pressure in the control chamber. It must be taken into account here that, in orde...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F02M47/00F02D41/30F02M47/02F02M59/46
CPCF02M47/027F02M63/0035F02M63/0026F02M63/0036F02M47/02
Inventor 罗格·波青弗里德里希·伯金
Owner ROBERT BOSCH GMBH