CN107061094B - A kind of pressure measurement method and device of diesel injector pressure chamber - Google Patents
A kind of pressure measurement method and device of diesel injector pressure chamber Download PDFInfo
- Publication number
- CN107061094B CN107061094B CN201710308826.8A CN201710308826A CN107061094B CN 107061094 B CN107061094 B CN 107061094B CN 201710308826 A CN201710308826 A CN 201710308826A CN 107061094 B CN107061094 B CN 107061094B
- Authority
- CN
- China
- Prior art keywords
- pressure
- oil return
- oil
- diesel injector
- pressure chamber
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M65/00—Testing fuel-injection apparatus, e.g. testing injection timing ; Cleaning of fuel-injection apparatus
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Fuel-Injection Apparatus (AREA)
Abstract
The present invention provides a kind of pressure test devices of diesel injector pressure chamber, including diesel injector to be measured, oil return set, gasket, flow sensor, adapter, low pressure oil return hole is processed in diesel injector to be measured, low pressure oil return hole is connect with the clearance leakage low pressure oil way of testing pressure chamber.Oil return set is mounted on diesel injector to be measured, and oil storage tank, the installation site of adjustment oil return set so that the fuel oil flowed out from low pressure oil return hole flows into oil storage tank are designed on oil return set.Oil return Analysis of Nested Design connecting hole is mounted on for installing adapter, flow sensor on adapter.The present apparatus is mounted on diesel injector to be measured, by measuring the flow curve of low pressure oil return, the pressure oscillation curve of testing pressure chamber can be obtained using clearance leakage calculation formula, can reduce the difficulty of test and cost of pressure chamber pressure oscillation curve.
Description
Technical field
The invention belongs to the pressure test technical fields of diesel injector pressure chamber, are sprayed more particularly, to a kind of diesel engine
The pressure measurement method and device of oily device pressure chamber.
Background technology
General diesel injector pressure cavity pressure is directly tested using pressure sensor, and pressure sensor is mounted on
The connection hole being connected to pressure chamber.The test method proposes stringent high pressure sealing requirement to the processing of connecting hole.In addition,
It is limited by fuel injector structure size, some cavity pressures are difficult arrangement pressure sensor, as common-rail injector control chamber can not be completed
Pressure sensor is installed and pressure test.
Invention content
In view of this, the present invention is directed to propose a kind of pressure measurement method and device of diesel injector pressure chamber, lead to
The low pressure flow variation for crossing the clearance leakage for measuring pressure chamber, utilizes the incidence relation of clearance leakage flow and pressure, Ke Yiji
Calculation obtains the pressure of testing pressure chamber.
In order to achieve the above objectives, the technical proposal of the invention is realized in this way：
A kind of pressure measurement method of diesel injector pressure chamber, including following content：
Low pressure oil return hole is processed on diesel injector to be measured, the gap of the low pressure oil return hole and testing pressure chamber is let out
Leak low pressure oil way connection；
Pass through the flow information for the fluid passage that flow sensor acquisition is connected to the low pressure oil return hole；
The flow information bonding gap leak calculation formula that will be obtained, the i.e. incidence relation of flow and pressure, obtain to be measured
The pressure information of pressure chamber.
In formula, d is couple diameter；Δ p is the difference of the pressure and low pressure oil way pressure of testing pressure chamber；δ is between couple
Gap；μ is the dynamic viscosity of fuel oil；L is clearance fit length；U is the speed of related movement of couple relative gap outer surface.Formula
In, d, low pressure oil way pressure, δ, μ, l and U are easier to measure and obtain.
A kind of pressure test device of diesel injector pressure chamber, including oil return set, adapter and flow sensor, institute
The side for stating oil return set is equipped with connecting hole, for installing adapter and being connected to the fluid channel of adapter, the flow sensing
Device is mounted on the flow information that fluid channel is acquired on adapter；The oil return is put on equipped with connection connecting hole and diesel engine to be measured
The clearance leakage low pressure oil way of the oil circuit for the low pressure oil return hole processed on fuel injector, the low pressure oil return hole and testing pressure chamber connects
It is logical.
Further, the oil return is put on equipped with oil storage tank and back oil road, and the oil storage tank is connected to low pressure oil return hole；Institute
State back oil road connection oil storage tank and connecting hole.
Further, the oil return is put on equipped with the upper seal groove and lower seal groove cavity for sealing low pressure oil return hole oil return,
Interior placement sealing ring.
Further, gasket is placed between the adapter and connecting hole.
Compared with the existing technology, the method for the present invention and device have the advantage that：
The present invention utilizes being associated with for clearance leakage flow and pressure by measuring the changes in flow rate of the clearance leakage of pressure chamber
The pressure of pressure chamber can be calculated in relationship, to reduce processing request and cost to connecting hole, while can reduce by
The influence of diesel injector structure size limitation, completes the pressure test of such as control chamber.
Description of the drawings
The attached drawing for constituting the part of the present invention is used to provide further understanding of the present invention, schematic reality of the invention
Example and its explanation are applied for explaining the present invention, is not constituted improper limitations of the present invention.In the accompanying drawings：
Fig. 1 is the schematic diagram of the pressure test device of diesel injector pressure chamber described in the embodiment of the present invention.
Reference sign：
Diesel injector (1) to be measured, low pressure oil return hole (2), oil return set (3), upper seal groove (4), gasket (5), stream
Quantity sensor (6), adapter (7), connecting hole (8), back oil road (9), oil storage tank (10), lower seal groove cavity (11).
Specific implementation mode
It should be noted that in the absence of conflict, the feature in embodiment and embodiment in the present invention can phase
Mutually combination.
The present invention will be described in detail below with reference to the accompanying drawings and embodiments.
The pressure test device of diesel injector pressure chamber of the embodiment of the present invention, as shown in Figure 1, including oil return set 3, turning
The side of connector 7 and flow sensor 6, oil return set 3 is equipped with connecting hole 8, for install adapter 7 and with adapter 7
Fluid channel is connected to, and the flow sensor 6 is mounted on the flow information that fluid channel is acquired on adapter 7；The oil return set 3
It is equipped with the oil circuit for the low pressure oil return hole 2 processed on connection connecting hole 8 and diesel injector 1 to be measured, the low pressure oil return hole 2
It is connected to the clearance leakage low pressure oil way of testing pressure chamber.
The oil return set 3 is equipped with oil storage tank 10 and back oil road 9, and the oil storage tank 10 is connected to low pressure oil return hole 2, described
Back oil road 9 is connected to oil storage tank 10 and connecting hole 8.
The oil return set 3 is equipped with upper seal groove 4 and lower seal groove cavity 11, interior placement sealing ring, for sealing diesel oil to be measured
The oil return of the low pressure oil return hole 2 of machine fuel injector 1.
Gasket 5 is placed between the adapter 7 and connecting hole 8, plays sealing function.
When test：
Oil return set 3 is mounted on diesel injector 1 to be measured, the installation site of adjustment oil return set 3 so that returned from low pressure
The fuel oil that oilhole 2 flows out flows into oil storage tank 10, and is sealed by upper seal groove 4 and lower seal groove cavity 11.By measuring low pressure oil return
Flow curve, the pressure oscillation curve of testing pressure chamber can be obtained using clearance leakage calculation formula, pressure chamber can be reduced
The difficulty of test and cost of pressure oscillation curve.
The present apparatus can be used for any one in mechanical diesel injector, electric-controlled type diesel injector.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all essences in the present invention
With within principle, any modification, equivalent replacement, improvement and so on should all be included in the protection scope of the present invention god.
Claims (5)
1. a kind of pressure test device of diesel injector pressure chamber, it is characterised in that：Including oil return set (3), adapter (7)
It is equipped with connecting hole (8) with the side of flow sensor (6), the oil return set (3), for installing adapter (7) and and adapter
(7) fluid channel connection, the flow sensor (6) are mounted on the flow information that fluid channel is acquired on adapter (7)；Institute
State the oil that oil return set (3) is equipped with the low pressure oil return hole (2) processed on connection connecting hole (8) and diesel injector to be measured (1)
Road, the low pressure oil return hole (2) are connected to the clearance leakage low pressure oil way of testing pressure chamber；
Pass through the flow information for the fluid passage that flow sensor (6) acquisition is connected to the low pressure oil return hole (2)；
Obtained flow information is combined into following clearance leakage calculation formula, the i.e. incidence relation of flow and pressure, is obtained to be measured
The pressure information of pressure chamber；
In formula, d is couple diameter；Δ p is the difference of the pressure and low pressure oil way pressure of testing pressure chamber；δ is couple gap；μ
For the dynamic viscosity of fuel oil；L is clearance fit length；U is the speed of related movement of couple relative gap outer surface.
2. the pressure test device of diesel injector pressure chamber according to claim 1, it is characterised in that：The oil return
It covers (3) and is equipped with oil storage tank (10) and back oil road (9), the oil storage tank (10) is connected to low pressure oil return hole (2)；The back oil road
(9) connection oil storage tank (10) and connecting hole (8).
3. the pressure test device of diesel injector pressure chamber according to claim 1, it is characterised in that：The oil return
It covers (3) and is equipped with the upper seal groove (4) and lower seal groove cavity (11) for being used for sealing low pressure oil return hole (2) oil return, interior placement sealing ring.
4. the pressure test device of diesel injector pressure chamber according to claim 1, it is characterised in that：The switching
Gasket (5) is placed between head (7) and connecting hole (8).
5. the pressure test device of diesel injector pressure chamber according to any one of claims 1 to 4, it is characterised in that：
It can be used for test mechanical formula diesel injector or electric-controlled type diesel injector.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710308826.8A CN107061094B (en) | 2017-05-04 | 2017-05-04 | A kind of pressure measurement method and device of diesel injector pressure chamber |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710308826.8A CN107061094B (en) | 2017-05-04 | 2017-05-04 | A kind of pressure measurement method and device of diesel injector pressure chamber |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107061094A CN107061094A (en) | 2017-08-18 |
| CN107061094B true CN107061094B (en) | 2018-11-06 |
Family
ID=59597774
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710308826.8A Active CN107061094B (en) | 2017-05-04 | 2017-05-04 | A kind of pressure measurement method and device of diesel injector pressure chamber |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107061094B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109026387B (en) * | 2018-09-05 | 2023-05-26 | 常熟市国瑞科技股份有限公司 | Fuel leakage early warning system of diesel engine oil outlet valve |
| CN114753993A (en) * | 2022-03-25 | 2022-07-15 | 江铃汽车股份有限公司 | Noise reduction method and system for automobile oil pump |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE10031203C2 (en) * | 2000-06-27 | 2002-06-27 | Siemens Ag | Method and device for leak testing of injection valves |
| CN102192066B (en) * | 2011-04-15 | 2013-03-13 | 江苏大学 | Method for measuring effective internal sectional area of each hole of oil nozzle of diesel engine |
| JP6344851B2 (en) * | 2014-08-26 | 2018-06-20 | 株式会社小野測器 | Injection measuring device |
| CN104405553B (en) * | 2014-11-19 | 2017-01-25 | 江苏大学 | Measuring device for oil injection rule of each hole of oil injection nozzle of diesel engine |
| CN105888910B (en) * | 2016-05-19 | 2018-05-08 | 中国第一汽车股份有限公司无锡油泵油嘴研究所 | A kind of atomizer balancing gate pit pressure measurement method |
| CN105927444B (en) * | 2016-05-23 | 2018-08-07 | 中国第一汽车股份有限公司无锡油泵油嘴研究所 | The device and method for measuring restricting orifice high-pressure leakage |
-
2017
- 2017-05-04 CN CN201710308826.8A patent/CN107061094B/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| CN107061094A (en) | 2017-08-18 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104142215B (en) | The method of testing and its device of a kind of sliding-contact packing sealing property | |
| CN107061094B (en) | A kind of pressure measurement method and device of diesel injector pressure chamber | |
| CN102865271A (en) | Detection method and device of internal leakage of hydraulic valve | |
| JPH03125098A (en) | Lubrication monitoring system | |
| CN106353043B (en) | Undercarriage buffer sealing property tester | |
| CN104677432A (en) | Magnetostrictive displacement sensing flowmeter and flow measuring method | |
| CN105864148B (en) | The quantitatively measuring device and measuring method of a kind of hydraulic cylinder sealing ring leakage rate | |
| CN114088924B (en) | Monitoring device and monitoring method for engineering machinery lubricating oil | |
| CN104358560B (en) | A kind of downhole flow test device with protection mechanism | |
| CN101349581B (en) | Insert type flow measuring device based on MEMS sensor | |
| CN108169071A (en) | Oil viscosity detection device under a kind of ultra-high voltage environment | |
| CN108444563A (en) | Fuel tank fuel quantity detection device based on pressure balance type | |
| CN107035593A (en) | The method of testing and device of a kind of fuel injector injection pressure | |
| CN206668255U (en) | Gas surveys fracture guide instrument | |
| CN201262559Y (en) | Plug-in flow measuring device based on MEMS sensor | |
| CN110174235A (en) | The measuring device and its application method of a kind of surface pressing of model in wind-tunnel | |
| CN111058985B (en) | Measuring device for dual fuel injector | |
| CN212844249U (en) | Leakage quantity detection device leaks in pneumatic cylinder | |
| CN112867909B (en) | Magnetic inductive flowmeter | |
| CN105673134B (en) | Oil level gauge of engine mounting structure | |
| RU83836U1 (en) | ELECTROMAGNETIC FLOW SENSOR | |
| CN209430529U (en) | A kind of hydraulic cylinder interior leakage leakage test device | |
| CN209131763U (en) | A kind of explosion-proof digital gas mass flow meter | |
| CN104728011B (en) | Pressure measuring device comprising oil spraying nozzle with pressure chamber | |
| KR20170023836A (en) | Pressure sensor for detecting a pressure of a liquid medium in a measuring chamber |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |