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Fuel pressure regulating system

A technology of fuel pressure, regulation system, applied in the direction of fuel injection control, electrical control, machine/engine, etc., can solve the problems of inaccurate regulation, slowness, disadvantage, etc.

Active Publication Date: 2010-11-24
VTESCO TECH GMBH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But this disadvantageously leads to slower and thus less accurate regulation

Method used

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  • Fuel pressure regulating system
  • Fuel pressure regulating system
  • Fuel pressure regulating system

Examples

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Embodiment Construction

[0024] exist figure 1 In the exemplary embodiment shown, a fuel pressure regulating system 1 according to the invention comprises a prefeed pump 2 and a main pressure pump 3 , which are connected to one another via a line 4 . A flow valve VCV is provided inside the pipeline 4 .

[0025] The outlet (ie, the high-pressure end) of the main pressure pump 3 is connected to the pressure accumulator 6 of the internal combustion engine through a pipeline 5 . The pressure accumulator 6 itself is connected to four injectors 7, which are used to make the combustion chamber 8 (in figure 1 Only one of them is shown in the diagram for simplified illustration) is supplied with high-pressure fuel (the pressure in the pressure accumulator 6). The fuel pressure regulation system 1 is therefore designed as a fuel injection system.

[0026] The two pumps 2 and 3 form the high-pressure pump 9 , which delivers fuel from the fuel tank 10 to the pressure accumulator 6 and thus assumes a given pres...

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Abstract

The invention relates to a fuel pressure regulating system for an internal combustion engine, said system comprising a pressure accumulator (6) which is used to store fuel under pressure and to feed the combustion chambers (8) of the internal combustion engine by means of fuel-supplying injectors, a high-pressure pump (9) which supplies a fuel mass flux to the pressure accumulator (6), a first valve (PCV) via which the fuel can be guided out of the pressure accumulator (6), and a second valve (VCV) for restricting the fuel mass flux. The system is provided with a first control loop (16) comprising the first valve (PCV) as an actuator for regulating the pressure in the pressure accumulator (6), and a second control loop (17) comprising the second valve (VCV) as an actuator for regulating the pressure in the pressure accumulator, and the two control loops (16, 17) are embodied as cascade regulators, the first control loop (16) being a master regulator and the second control loop (17) being a follower regulator.

Description

technical field [0001] The invention relates to a fuel pressure regulating system for an internal combustion engine, having a pressure accumulator, which stores fuel under pressure and supplies it to the combustion chamber of the internal combustion engine through an injector supplying the fuel, and a high pressure pump, which delivers the fuel flow to the accumulator The pressurizer also has a first valve and a second valve through which the fuel is discharged from the pressure accumulator, and the second valve is used to regulate the fuel flow. Background technique [0002] In such fuel pressure control systems, which are frequently used in rail injection systems, very high demands are placed on the precision and performance of the pressure control in the pressure accumulator. Fast and accurate regulation is achieved by using the first valve as the regulating link in the regulating loop. The disadvantage here is that a fuel delivery that satisfies the requirements can no ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F02D41/14F02D41/38
CPCF02D2250/31F02D41/3863F02D2041/1419F02D41/1401F02D41/3845
Inventor C·阿德勒U·琼格黎晖M·沃科夫斯基张宏
Owner VTESCO TECH GMBH