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Device for injecting fuel into the combustion chamber of an internal combustion engine

A technology of fuel injection and internal combustion engine, which is applied in the direction of fuel injection device, special fuel injection device, fuel injection device with oil reservoir, etc., and can solve the problem that it can no longer be used

Active Publication Date: 2013-06-26
ROBERT BOSCH GMBH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] The problem in this case, however, is that stresses occur in the transition region of the resonator throttle, wherein micro-movements can be observed when the rod-shaped resonator element is pressed into the high-pressure accumulator body, so that for system pressures greater than 1800 bar In other words, this design of the resonator body as a pressed-in rod resonator is no longer usable due to this micro-movement and also due to the limited pressing-in force

Method used

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  • Device for injecting fuel into the combustion chamber of an internal combustion engine
  • Device for injecting fuel into the combustion chamber of an internal combustion engine
  • Device for injecting fuel into the combustion chamber of an internal combustion engine

Examples

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Embodiment Construction

[0019] Figure 1 shows an injector 1 with a nozzle 2, a throttle plate 3, a valve plate 4, a holding body 5 and a high-pressure accumulator 6, wherein a nozzle clamping nut 7 screwed to the holding body 5 holds the nozzle 2. The throttle plate 3 and the valve plate 4 are assembled together. In the rest state, the solenoid valve 13 is closed, so that high-pressure fuel flows from the high-pressure accumulator 6 via the high-pressure line 8 , the transverse connection 9 and the inlet throttle valve 10 into the control chamber 11 of the nozzle 2 , whereas from the control chamber 11 via the outlet valve The discharge of the flow valve 12 is blocked at the valve seat of the solenoid valve 13 . The system pressure applied in the control chamber 11 together with the force of the nozzle spring 14 presses the nozzle needle 15 into the nozzle needle seat 16 so that the spray opening 17 is closed. If the solenoid valve 13 is actuated, the solenoid valve releases the flow through the sol...

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Abstract

The invention relates to a device for injecting fuel into the combustion chamber of an internal combustion engine with at least one injector (1) comprising an injector body that is equipped with a high-pressure accumulator (6), a nozzle needle (15) which is guided in the injector (1) in an axially movable manner and which is surrounded by a nozzle chamber (19), a high-pressure line (8) that connects the high-pressure accumulator (6) to the nozzle chamber (19), and a resonator line (20) which is connected parallel to the high-pressure line (8) and which is connected to the nozzle chamber (19) and opens into the high-pressure accumulator (6) via a resonator throttle (21). The resonator line (20) and the high-pressure line (8) are formed in a retaining body (5) at least in the line section adjoining the high-pressure accumulator (6), said retaining body being screwed into the accumulator pipe (22) that forms the high-pressure accumulator (6) at the retaining body end face.

Description

technical field [0001] The invention relates to a device for injecting fuel into a combustion chamber of an internal combustion engine, said device having at least one injector comprising: an injector body equipped with a high-pressure accumulator; A nozzle needle guided axially displaceably in the injector, which is surrounded by a nozzle chamber; a high-pressure line connecting the high-pressure accumulator and the nozzle chamber; a resonator line connected in parallel to the high-pressure line, the resonator The line is connected to the nozzle chamber and leads via the resonator throttle into the high-pressure accumulator. Background technique [0002] Electronically controlled injection injectors are used in common rail systems to inject fuel into the engine combustion chambers. The servo valves used in the injectors cause the nozzles to close very quickly, so that due to the inertia of the fuel in the connected high-pressure bores, strong pressure pulsations are create...

Claims

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Application Information

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IPC IPC(8): F02M47/02F02M61/16
CPCF02B17/005F02M47/027F02M61/168F02M2200/31F02M2200/40F02M47/02F02M61/16F02M61/14
Inventor C.格拉斯佩昂纳G.昂特贝格尔F.古根比希勒
Owner ROBERT BOSCH GMBH