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Injection device for fuel motors

A technology for injection devices and internal combustion engines, which is applied in fuel injection devices, fuel injection pumps, low-pressure fuel injection, etc., and can solve problems such as the influence of nitrogen oxide emission rates

Inactive Publication Date: 2010-10-20
MAN ENERGY SOLUTIONS SA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this effect on the nitrogen oxide emission rate (NO x -emission rate) negatively affects

Method used

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  • Injection device for fuel motors
  • Injection device for fuel motors
  • Injection device for fuel motors

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Experimental program
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Embodiment Construction

[0019] Below, refer to the attached figure 1 and 2 to describe the invention.

[0020] figure 1 A schematic diagram of an injection device of a fuel engine is shown. The embodiment of the invention is preferably suitable for pressure-controlled injection valves / injectors 7 , but also for injection valves / injectors which only open when the fuel pressure is connected.

[0021] The fuel in the fuel tank 1 is supplied to the accumulator 3 at a pressure of about 600-2500 Bar through the high-pressure fuel supply device 2 . The 3 / 2-way valve 4 , which is connected to the pressure accumulator 3 , feeds fuel into the injector 7 depending on the switching position. In the first position 4.1 of the 3 / 2-way valve, the throttle control valve 10.2, in which the constant-pressure control valve 8.1 and the adjustable throttle valve 8.2 are arranged, is separated from the 3 / 2-way valve 4. Simultaneously, when the 2 / 2-way valve 6 is open, fuel from the pressure accumulator 3 is fed into t...

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PUM

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Abstract

The present invention relates to an ejection apparatus of internal combustion engine. According to the invention, in the ejection apparatus with stroke-controlled injector (9) with the front-set 3 / 2 reversal valve (4) it realizes the forming of the spraying speed (forming of the directing speed), and in the ejection apparatus with pressure-controlled injector (7) with the front-set 3 / 2 reversal valve (6) it realizes the forming of the spraying speed (forming of the directing speed).

Description

technical field [0001] The invention relates to an injection device for an internal combustion engine. Background technique [0002] Injection systems that inject fuel at variable pressures, such as common rail injection systems, mainly have a very fast injection velocity at the start of injection. It injects a lot of fuel at high pressure. However, this effect on the nitrogen oxide emission rate (NO x - emission rate) have a negative impact. By releasing / opening the injection nozzles in stages or by defining an opening characteristic in the injection nozzles (boot rate shaping), a stepped injection rate can be achieved and thus have a favorable influence on the discharge rate. [0003] Injection systems for internal combustion engines are known from the prior art, by means of which injection velocity shaping can be achieved. In one possible embodiment of the injection system of such an internal combustion engine, the 2 / 2-way valve is arranged upstream of the stroke-cont...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F02M47/06F02M45/04F02M47/02
CPCF02M47/027F02M63/0007F02M63/0005F02M63/0045F02M45/00F02M59/20F02M69/16
Inventor L·梅尔C·施罗特
Owner MAN ENERGY SOLUTIONS SA