CN112857821A - Failure recognition device and failure recognition method for fuel distribution pipe assembly - Google Patents
Failure recognition device and failure recognition method for fuel distribution pipe assembly Download PDFInfo
- Publication number
- CN112857821A CN112857821A CN202011545685.XA CN202011545685A CN112857821A CN 112857821 A CN112857821 A CN 112857821A CN 202011545685 A CN202011545685 A CN 202011545685A CN 112857821 A CN112857821 A CN 112857821A
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- distribution pipe
- fuel
- fuel distribution
- pipe assembly
- control
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- 239000000446 fuel Substances 0.000 title claims abstract description 84
- 238000000034 method Methods 0.000 title claims abstract description 16
- 230000007246 mechanism Effects 0.000 claims abstract description 39
- 238000012360 testing method Methods 0.000 claims description 18
- 238000005259 measurement Methods 0.000 claims description 8
- 239000007788 liquid Substances 0.000 claims description 4
- 238000007789 sealing Methods 0.000 claims description 3
- 238000004519 manufacturing process Methods 0.000 abstract description 9
- 239000003921 oil Substances 0.000 description 6
- 239000007789 gas Substances 0.000 description 4
- 230000008859 change Effects 0.000 description 3
- 238000009434 installation Methods 0.000 description 2
- 238000009530 blood pressure measurement Methods 0.000 description 1
- 239000000306 component Substances 0.000 description 1
- 239000008358 core component Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000000295 fuel oil Substances 0.000 description 1
- 238000002309 gasification Methods 0.000 description 1
- 239000011261 inert gas Substances 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 238000007726 management method Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000000691 measurement method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000010349 pulsation Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000013022 venting Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Images
Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M17/00—Testing of vehicles
- G01M17/007—Wheeled or endless-tracked vehicles
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Fuel-Injection Apparatus (AREA)
Abstract
The invention discloses a failure recognition device for a fuel distribution pipe assembly, which comprises a pressure generating mechanism, a measuring mechanism, a first control piece, a second control piece, a third control piece, a connecting piece and a connecting interface, wherein the pressure generating mechanism is connected with the measuring mechanism; the pressure generating mechanism is connected with a first connecting end of the three-way pipe fitting, the measuring mechanism is connected with a second connecting end of the three-way pipe fitting, the connecting piece is connected with a third connecting end of the three-way pipe fitting, the first control piece is arranged between the pressure generating mechanism and the three-way pipe fitting, the second control piece is arranged between the three-way pipe fitting and the connecting piece, the third control piece is arranged on the connecting piece, and the connecting piece is connected with the fuel distribution pipe assembly through a connecting interface. The invention also discloses a fuel distribution pipe assembly failure identification method using the fuel distribution pipe assembly failure identification device. The invention can distinguish the failure modes which can not be distinguished and identified by the existing fuel distributing pipe assembly production line, has low production and manufacturing cost and is convenient to use and operate.
Description
Technical Field
The invention relates to the field of automobiles, in particular to an identification device for a fuel distribution pipe assembly. The invention also discloses a failure identification method for the fuel distribution pipe assembly
Background
The fuel rail assembly is one of the core components of an engine management system. The fuel distribution pipe assembly is a component of an air/fuel subsystem in an electronic control fuel injection system, is a mechanical device arranged on an intake manifold and positioned at a fuel injector, and has the main function of ensuring that sufficient fuel flow is provided and is uniformly distributed to the fuel injectors of cylinders, and simultaneously, the installation and the connection of the fuel injectors are realized.
The fuel distribution pipe assembly is used as a controlled actuator which is a cavity with certain size and pressure in shape, and ensures that the fuel distribution pipe assembly receives an ECU instruction in function and injects specified amount of fuel to the engine in a specified time range. The fuel distribution pipe assembly has important influence on fuel pressure pulsation, fuel high-temperature gasification and the like. The aims of reducing fuel consumption and reducing harmful gas emission can be achieved through the fuel distribution pipe assembly. The fuel distribution pipe assembly has the advantages of long manufacturing period, complex production process, numerous failure modes, long failure identification period and high cost.
For example, in the failure mode of the oil inlet pipe plug of the fuel distribution pipe assembly, once the oil inlet pipe is installed on an engine, the oil inlet pipe plug can be only installed in a whole vehicle oil through hot test mode under the existing condition, the single hot test time period is about 10 minutes, and the cost is 200 yuan; and once the parts are invalid, the client side can lock all the parts in the same batch, and the number of the parts is more than 1000 pcs. There is a need for a quick and economical failure identification device in terms of time and production costs.
Disclosure of Invention
The invention aims to provide a device capable of quickly, accurately and economically identifying the failure of an oil distribution pipe assembly.
The invention also provides a fuel distribution pipe assembly failure identification method for identifying failure of the fuel distribution pipe assembly
In order to solve the above technical problem, the present invention provides a fuel distribution pipe assembly failure recognition apparatus, comprising: the pressure generating mechanism, the measuring mechanism, the first control piece, the second control piece, the third control piece, the connecting piece and the connecting interface are arranged on the measuring mechanism;
the pressure generating mechanism is connected with a first connecting end of the three-way pipe fitting, the measuring mechanism is connected with a second connecting end of the three-way pipe fitting, the connecting piece is connected with a third connecting end of the three-way pipe fitting, the first control piece is arranged between the pressure generating mechanism and the three-way pipe fitting, the second control piece is arranged between the three-way pipe fitting and the connecting piece, the third control piece is arranged on the connecting piece, and the connecting piece is connected with the fuel distribution pipe assembly through a connecting interface.
Wherein the pressure generating mechanism is a pneumatic pump or a hydraulic pump.
Wherein the first control member is a shut-off valve.
Wherein the second control member is a pressure relief valve.
Wherein the third control is a ball valve.
Wherein, the connecting piece is a hard sealing connecting pipe.
A fuel distribution pipe assembly failure identification method using any one of the above fuel distribution pipe assembly failure identification devices includes:
1) connecting a failure recognition device of the fuel distribution pipe assembly with the input end of the fuel distribution pipe assembly;
2) closing the third control;
3) starting a pressure generating mechanism to accumulate a test body with preset conditions in the failure recognition device of the fuel distribution pipe assembly;
4) the first observation measuring mechanism records a first measuring parameter;
5) opening a third control and continuing for a first preset time period;
6) closing the first control element for a second preset time period
7) Observing the measuring mechanism and recording the second measuring parameter;
8) and if the second observation measurement parameter is less than or equal to the first observation parameter and is greater than zero, judging that the fuel distribution pipe assembly is invalid.
If the second observation parameter is equal to the first observation parameter, judging that the fuel distribution pipe assembly is completely blocked;
if the second observation parameter is equal to 1% -99% of the first observation parameter, judging that the fuel distribution pipe assembly is partially blocked;
wherein the preset condition is the volume of the test body or the pressure of the test body.
Wherein, the test body is gas or liquid. Gases such as air and various commonly used inert gases. Liquids such as various test oils, and even water.
Wherein the first preset time period is 5-30 seconds, and the second preset time period is 5-10 seconds.
The installation mode of the invention is as follows:
a digital display pressure meter is connected to the pressure pump, one end of a hard connecting pipe with a certain pipe diameter (the pipe diameter is determined according to the fuel distribution pipe assembly) is connected to the air outlet end of the pressure pump, and the other end of the hard connecting pipe is connected to the air inlet end of the ball valve. The air outlet end of the ball valve is connected to the air inlet end of the quick connector through a hard connecting pipe made of the same material. After the equipment is assembled, the quick connector is connected with a fuel distribution pipe assembly to be tested.
The invention judges the failure:
compared with the traditional defect identification mode of the fuel distribution pipe assembly, the method has the following technical effects:
1) the invention adopts an equivalent measurement method, and can distinguish the failure modes which cannot be distinguished and identified by the existing fuel distribution pipe assembly production line.
2) The weight of the whole device can be controlled within 5 kilograms, and the device is convenient to carry and move.
3) The engine and the whole vehicle are suitable for various occasions such as an engine and whole vehicle production line, an outdoor test yard, a whole vehicle rack, a 4S store and the like, and the applicability is high.
4) The whole set of device low in production cost, whole set of device cost is within 3 ten thousand yuan, compares current fuel distributing pipe assembly and produces line check out test bench, the low price.
5) The identification process does not need to disassemble parts, does not discharge harmful substances, and really achieves cleanness and no pollution.
Drawings
The invention will be described in further detail with reference to the following detailed description and accompanying drawings:
fig. 1 is a schematic view of the overall structure of the identification device of the present invention. A
FIG. 2 is a flow chart illustrating the identification method of the present invention.
Description of the reference numerals
1 is a pressure generating mechanism
2 is a first control member
3 is a measuring mechanism
4 is a second control member
5 is a connecting piece
6 is a third control
7 is a connection interface
8 is a fuel distribution pipe assembly
First connecting end of A three-way pipe fitting
Second connecting end of B three-way pipe fitting
Third connecting end of C three-way pipe fitting
Detailed Description
As shown in fig. 1, an embodiment of the present invention includes a pressure generating mechanism 1, a first control member 2, a measuring mechanism 3, a second control member 4, a connecting member 5, a third control member 6 and a connecting interface 7;
the pressure generating mechanism 1 is connected with a first connecting end A of the three-way pipe fitting, the measuring mechanism 3 is connected with a second connecting end B of the three-way pipe fitting, the connecting piece 5 is connected with a third connecting end C of the three-way pipe fitting, the first control piece 4 is arranged between the pressure generating mechanism 1 and the three-way pipe fitting, the second control piece 4 is arranged between the three-way pipe fitting and the connecting piece 5, the third control piece 6 is arranged on the connecting piece 5, and the connecting piece 5 is connected with the fuel distribution pipe assembly 8 through a connecting interface 7.
The pressure generating mechanism 1 is a pneumatic pump or a hydraulic pump, and gas or liquid is pressurized as a measuring body and filled into the fuel distribution pipe assembly 8.
The first control element is a stop valve, the second control element is a pressure release valve, the third control element is a ball valve, and the failure recognition device of the fuel distribution pipe assembly is pressurized during recognition testing, so that a hard sealing connecting pipe is required to bear certain testing pressure.
As shown in fig. 2, the present invention provides a fuel dispensing pipe assembly failure recognition method using the fuel dispensing pipe assembly failure recognition apparatus, including:
1) connecting a failure recognition device of the fuel distribution pipe assembly with the input end of the fuel distribution pipe assembly;
2) closing the third control;
3) starting a pressure generating mechanism to accumulate a test body with preset conditions in the failure recognition device of the fuel distribution pipe assembly;
4) the first observation measuring mechanism records a first measuring parameter;
5) starting a third control and continuing for a first preset time period, wherein the step is to fully pressurize the fuel oil distribution pipe assembly, and failure judgment is easier to execute due to the existence of high pressure after full pressurization;
6) closing the first control member for a second predetermined period of time, the step being directed to substantially venting pressure using the fuel dispensing tube assembly; if plugged, the pressure will remain constant, if partially plugged, the pressure will change, and if unplugged, the pressure will become zero. By ensuring that the pressure has a sufficiently long time by the second preset period of time, it is easier to distinguish between partial and full occlusions.
7) Observing the measuring mechanism and recording the second measuring parameter;
8) and if the second observation measurement parameter is less than or equal to the first observation parameter and is greater than zero, judging that the fuel distribution pipe assembly is invalid.
If the second observation parameter is equal to the first observation parameter, judging that the fuel distribution pipe assembly is completely blocked;
and if the second observation parameter is equal to 1% -99% of the first observation parameter, judging that the fuel distribution pipe assembly is partially blocked. In the case of actual users, the percentage of the second observed parameter equal to the first observed parameter does not reach the extreme value of 1% or 99% (the extreme value is only a theoretical value), which is determined by the occlusion specific condition.
Wherein the preset condition is the volume of the test body or the pressure of the test body.
Wherein the first preset time period is 5-30 seconds, preferably 10 seconds, 15 seconds, 20 seconds or 25 seconds; the second preset period of time is 5-10 seconds, preferably 10 seconds, 15 seconds, 20 seconds or 25 seconds; .
According to the identification method, the failure identification device of the fuel distribution pipe assembly is connected with the input end of the fuel distribution pipe assembly and is in closed connection with the quick connector through the hard connecting pipe, and then the ball valve on the hard connecting pipe is closed, so that the failure identification device of the fuel distribution pipe assembly forms a closed space and is pressurized. When a predetermined condition, such as a volume (volume convertible to pressure) or a pressure, is reached, the ball valve on the rigid connector is opened for a period of time, such as 5 seconds, and the accumulated pressure is substantially released into the fuel dispensing line assembly, and during this 5 seconds the predetermined volume or pressure measurement is filled into the fuel dispensing line assembly failure identification means, and then the shut-off valve is closed and the pressure generating means stops generating pressure. If the fuel distribution pipe assembly is completely blocked, a measuring body of preset volume or pressure is basically kept (the change is negligible slightly, and the failure judgment accuracy is not influenced). If the fuel delivery line assembly becomes partially clogged, a measurement volume leak will occur during a second predetermined period of time, which will cause a significant change in the predetermined volume or pressure. If the fuel distribution pipe assembly is not blocked, the measurement body of the preset volume or pressure can be released quickly, the measurement mechanism cannot measure the measurement body of the preset condition volume or pressure, and the measured parameter is zero (namely atmospheric pressure) due to the release of the measurement body.
The present invention has been described in detail with reference to the specific embodiments and examples, but these are not intended to limit the present invention. Many variations and modifications may be made by one of ordinary skill in the art without departing from the principles of the present invention, which should also be considered as within the scope of the present invention.
Claims (11)
1. A fuel dispensing tube assembly failure identification device, comprising: the pressure generating mechanism, the measuring mechanism, the first control piece, the second control piece, the third control piece, the connecting piece and the connecting interface are arranged on the measuring mechanism;
the pressure generating mechanism is connected with a first connecting end of the three-way pipe fitting, the measuring mechanism is connected with a second connecting end of the three-way pipe fitting, the connecting piece is connected with a third connecting end of the three-way pipe fitting, the first control piece is arranged between the pressure generating mechanism and the three-way pipe fitting, the second control piece is arranged between the three-way pipe fitting and the connecting piece, the third control piece is arranged on the connecting piece, and the connecting piece is connected with the fuel distribution pipe assembly through a connecting interface.
2. A fuel dispensing line assembly failure recognition arrangement as claimed in claim 1, wherein: the pressure generating mechanism is a pneumatic pump or a hydraulic pump.
3. A fuel dispensing line assembly failure recognition arrangement as claimed in claim 1, wherein: the first control member is a shut-off valve.
4. A fuel dispensing line assembly failure recognition arrangement as claimed in claim 1, wherein: the second control member is a pressure relief valve.
5. A fuel dispensing line assembly failure recognition arrangement as claimed in claim 1, wherein: the third control is a ball valve.
6. A fuel dispensing line assembly failure recognition arrangement as claimed in claim 1, wherein: the connecting piece is a hard sealing connecting pipe.
7. A fuel dispensing line assembly failure recognition method using the fuel dispensing line assembly failure recognition apparatus as set forth in any one of claims 1 to 6, comprising:
1) connecting a failure recognition device of the fuel distribution pipe assembly with the input end of the fuel distribution pipe assembly;
2) closing the third control;
3) starting a pressure generating mechanism to accumulate a test body with preset conditions in the failure recognition device of the fuel distribution pipe assembly;
4) the first observation measuring mechanism records a first measuring parameter;
5) opening a third control and continuing for a first preset time period;
6) closing the first control element for a second preset time period
7) Observing the measuring mechanism and recording the second measuring parameter;
8) and if the second observation measurement parameter is less than or equal to the first observation parameter and is greater than zero, judging that the fuel distribution pipe assembly is invalid.
8. The fuel dispensing tube assembly failure identification method of claim 7, wherein: if the second observation parameter is equal to the first observation parameter, judging that the fuel distribution pipe assembly is completely blocked;
and if the second observation parameter is equal to 1% -99% of the first observation parameter, judging that the fuel distribution pipe assembly is partially blocked.
9. The fuel dispensing tube assembly failure identification method of claim 7, wherein: the preset condition is the volume of the test body or the pressure of the test body.
10. The fuel dispensing tube assembly failure identification method of claim 7, wherein: the test body is gas or liquid.
11. The fuel dispensing tube assembly failure identification method of claim 7, wherein: the first preset time period is greater than or equal to 5 seconds.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011545685.XA CN112857821A (en) | 2020-12-24 | 2020-12-24 | Failure recognition device and failure recognition method for fuel distribution pipe assembly |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011545685.XA CN112857821A (en) | 2020-12-24 | 2020-12-24 | Failure recognition device and failure recognition method for fuel distribution pipe assembly |
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| Publication Number | Publication Date |
|---|---|
| CN112857821A true CN112857821A (en) | 2021-05-28 |
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| CN202011545685.XA Pending CN112857821A (en) | 2020-12-24 | 2020-12-24 | Failure recognition device and failure recognition method for fuel distribution pipe assembly |
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| CN (1) | CN112857821A (en) |
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2020
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Application publication date: 20210528 |
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