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Method and device for performing leakage testing on fuel injection valve of internal combustion engine

A fuel injection valve and leakage detection technology, which is applied in the direction of fuel injection device, measurement device, engine test, etc., can solve the problems of unfavorable cost, assembly cost, etc., improve measurement resolution or signal/noise-ratio, and improve expression effect of ability

Pending Publication Date: 2017-12-08
ROBERT BOSCH GMBH
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Not only is this disadvantageous from a cost standpoint, replacing all injectors also requires significant assembly expense
[0005] Furthermore, only for workshop purposes, the leak measurement of individual injectors with measuring tubes on the injectors is known, but this leak measurement is only used for passenger cars and is also not permitted or used by all motor vehicle manufacturers, Since leak measurement requires open operation with fuel running on the internal combustion engine, this represents a significant safety risk

Method used

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  • Method and device for performing leakage testing on fuel injection valve of internal combustion engine
  • Method and device for performing leakage testing on fuel injection valve of internal combustion engine
  • Method and device for performing leakage testing on fuel injection valve of internal combustion engine

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Embodiment Construction

[0024] By means of the known from DE 10 2004 055 575 A1 and in figure 1 The electrically actuatable solenoid valve injector shown in FIG. 1 regulates the start of injection and the injection quantity of fuel into the combustion chambers of cylinders 300 of the internal combustion engine. Fuel enters the high-pressure-inlet channel from a high-pressure fuel source 95 , which includes, for example, in the case of a common rail system, at least one high-pressure fuel pump and a high-pressure accumulator (fuel rail) via a high-pressure connection 90 (Hochdruckanschluss) 92 to the injection nozzle 60 , also referred to as the nozzle needle, and through the inlet throttle valve 100 into the valve control space 50 . The valve control space 50 is connected to the fuel return 10 via a meter-out valve 80 which can be opened by a solenoid valve consisting of a magnetic coil 20 , an armature 30 (Magnetanker) and a valve ball 40 .

[0025] In the closed state of the meter-out valve 80 , ...

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Abstract

The invention relates to a method and a device for performing leakage testing on a fuel injection valve of an internal combustion engine. The fuel injection valve is provided with at least one actuator (630). Through the actuator, the connecting part between the fuel injection valve and a high-voltage fuel source (95) is at least indirectly controlled through electric control equipment (200), wherein at least one actuator (630) is configured in a fuel backflow part (10) or next to the fuel backflow part. Furthermore particularly, the temperature of at least one part of the fuel injection valve is determined through detecting the DC resistance of the actuator (630), and furthermore determining whether leakage exists.

Description

technical field [0001] The invention is based on a method or a device for leak detection of a fuel injection valve of an internal combustion engine according to the preambles of the independent claims. The object of the invention also includes an electronic controller of an internal combustion engine, a computer program, a machine-readable data carrier for storing said computer program and an electronic controller, by means of which the method according to the invention is able to be executed. Background technique [0002] In most modern motor vehicles with an internal combustion engine, fuel is pumped out of a fuel container by means of a fuel pump and delivered via a fuel line to fuel injection valves, also referred to as “injectors”. Excess fuel is typically returned to the fuel container via a return conduit. In the case of internal combustion engines with high-pressure injection (so-called "common rail systems"), especially those with auto-ignition, a further pump is ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F02M65/00
CPCF02M65/006G01M3/002G01M15/048
Inventor T.维茨巴赫M.迪特莱夫森A.亨佩尔H-E.布拉
Owner ROBERT BOSCH GMBH
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