Diagnosing system and diagnosing method for fuel injector
A diagnostic system and fuel injector technology, applied in the field of fuel injector diagnostic system and portable fuel injector diagnostic system, can solve problems such as failure, inability to use, and no fuel injector diagnostics.
Active Publication Date: 2019-12-20
ROBERT BOSCH GMBH
View PDF6 Cites 0 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
But the method of this prior art can't be used under the situation that starter breaks down at first, secondly starts starter many times and also can cause it to break down, moreover there is difference in the performance of the oil supply pump of each diesel vehicle more or less, therefore This method does not have a uniform basis for injector diagnostics
Method used
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View moreImage
Smart Image Click on the blue labels to locate them in the text.
Smart ImageViewing Examples
Examples
Experimental program
Comparison scheme
Effect test
Embodiment Construction
[0037] In the various figures of the application, structurally identical or functionally similar features are indicated by the same reference numerals.
[0038] figure 1 A schematic diagram of one prior art method of diagnosing fuel injectors without dismantling the engine cylinder head is schematically shown.
[0039] Taking the high-pressure common rail 100 with six oil outlet ports 102 as an example, according to this method, when it is necessary to diagnose whether a fuel injector 400 is faulty, first connect the high-pressure common rail 100 to the fuel injector to be diagnosed. The remaining five oil outlet ports 102 connected to 400 are all blocked with detachable caps 103 . In this way, only one oil outlet port 102 of the high pressure common rail 100 is connected to the oil inlet port of the fuel injector 400 via a connecting pipe, preferably a metal pipe 500 . Then, because the diesel engine cannot drive the oil supply pump 200 to run at this time, the crankshaft o...
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More PUM
Login to View More Abstract
The invention provides a diagnosing system (100) for a fuel injector. The system comprises an oil supply pump (1010), particular an electric oil supply pump, an oil outlet interface (1080), a pressuresensor (1030) and a central control unit (1060), wherein the pressure sensor (1030) is arranged in fluid pipelines (1112,1113) between the oil supply pump (1010) and the oil outlet interface (1080);the central control unit (1060) is operably connected to the oil supply pump (1010) and the pressure sensor (1030) and controls operation of the oil supply pump (1010) and receives a pressure signal in a fluid pipeline from the pressure sensor (1030), and the oil outlet interface (1080) can be in fluid communication to an oil inlet of the fuel injector (400), so that fuel pressurized by the oil supply pump (1010) can be supplied to the fuel injector (400) from the oil outlet interface (1080), and the central control unit (1060) judges whether the fuel injector (400) is normal or not accordingto a variation trend of the fuel pressure signal detected by the pressure sensor (1030).
Description
technical field [0001] The present application relates to a fuel injector diagnostic system, especially a portable fuel injector diagnostic system, and a fuel injector diagnostic method. Background technique [0002] High-pressure common rail is usually used in the fuel supply system of diesel vehicles, and the low-pressure fuel from the fuel tank of diesel vehicles is pressurized and accumulated in the high-pressure common rail through the fuel supply pump. The high-pressure common rail is connected to the fuel injector through a metal pipe, so that high-pressure fuel can be selectively injected into the cylinder of the diesel engine at a certain high pressure through the fuel injector. [0003] In the case of low fuel quality or long-term use of diesel vehicles, the engine or fuel supply system is likely to fail. For example, if the oil return volume of the injector is inaccurate, it will lead to inaccurate high-pressure common rail control, which will affect the output t...
Claims
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More Application Information
Patent Timeline
Login to View More IPC IPC(8): F02M65/00
CPCF02M65/00
Inventor 赵勇戚永爱
Owner ROBERT BOSCH GMBH