CN115700360A - Engine friction work testing method - Google Patents
Engine friction work testing method Download PDFInfo
- Publication number
- CN115700360A CN115700360A CN202211368518.1A CN202211368518A CN115700360A CN 115700360 A CN115700360 A CN 115700360A CN 202211368518 A CN202211368518 A CN 202211368518A CN 115700360 A CN115700360 A CN 115700360A
- Authority
- CN
- China
- Prior art keywords
- work
- friction work
- engine
- friction
- testing
- 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.)
- Pending
Links
- 238000012360 testing method Methods 0.000 title claims abstract description 71
- 238000000034 method Methods 0.000 claims abstract description 8
- 239000003921 oil Substances 0.000 claims description 52
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 9
- 239000010705 motor oil Substances 0.000 claims description 7
- 230000000903 blocking effect Effects 0.000 claims description 3
- 238000002360 preparation method Methods 0.000 claims description 3
- 238000010998 test method Methods 0.000 claims 7
- 238000005457 optimization Methods 0.000 abstract description 8
- 239000000446 fuel Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
Landscapes
- Testing Of Engines (AREA)
Abstract
The invention discloses a method for testing the friction work of an engine, which comprises the following steps: s1: disassembling the engine; s2: testing the friction work of the crankshaft journal; s3: testing the friction work of the oil pump; s4: testing the friction work of the piston assembly; s5: testing the friction work of the main journal; s6: testing the friction work of the front end wheel system; s7: testing friction work of other motors; s8: testing the friction work of the valve system of the air valve; s9: testing the friction work of the high-pressure oil pump; s10: the friction work test of the timing chain system adopts the test steps of the invention, the engine can be completely decomposed, the friction work test result is more accurate, and engineers can conveniently know which specific parts have large friction work, thereby finding the optimized direction and facilitating the design optimization in the later period.
Description
Technical Field
The invention relates to the technical field of engines, in particular to a method for testing the friction work of an engine.
Background
With the implementation of the national third-stage fuel consumption regulation, in order to meet the requirements, the fuel consumption of the engine needs to be reduced, and besides combustion optimization, low-friction part structures are designed. The design of each part of the engine is finished, and in the process of engineering development, in order to determine the consumption level of the friction work of the engine and the proportion distribution of the friction work in each friction pair (providing the direction for optimizing the friction loss), the friction work test needs to be carried out on the engine.
However, the existing friction work testing steps are not standardized, the engine friction work is not decomposed or the decomposition testing result is not accurate, so that the engine friction work is large, an engineer does not know which system friction work is large, the optimization direction cannot be found, the final effect cannot be achieved, and the later-stage design optimization is misled.
Disclosure of Invention
The invention provides an engine friction work testing method for improving the accuracy of engine friction work testing.
The invention provides a method for testing the friction work of an engine, which adopts the following technical scheme:
an engine friction work testing method, comprising:
s1: test preparation: disassembling the engine and plugging the crankshaft connecting rod journal oil hole;
s2: testing the friction work of the crankshaft journal: only assembling a crankshaft for testing, adopting an external oil supply pump to supply oil, assembling parts related to an oil duct on an engine, adopting a tool to block an oil hole of the oil pump, and then detecting the indicating work and the effective work of the engine;
s3: testing the friction work of the oil pump: on the basis of S2, an oil pump is installed for testing, the oil pump of an external oil supply stops working, and then the indicating work and the effective work of the engine are detected;
s4: and (3) testing the friction work of the piston assembly: on the basis of S3, assembling a piston assembly, and then detecting the indicated work and the effective work of the engine;
s5: and (3) testing the friction work of the main journal: assembling all parts of the engine except an intake manifold, an exhaust manifold and a piston connecting rod assembly, blocking an oil hole of a crankshaft connecting rod neck, and then detecting the indicating work and the effective work of the engine;
s6: testing the friction work of the front-end wheel system: on the basis of S5, removing a front end wheel train belt, and then detecting the indicated work and the effective work of the engine;
s7: and (3) testing the friction work of other motors: on the basis of S6, only assembling a water pump belt, and then detecting the indicated work and the effective work of the engine;
s8: testing the friction work of the valve system: removing the valve and the spring on the basis of S7, and then detecting the indicated work and the effective work of the engine;
s9: and (3) testing the friction work of the high-pressure oil pump: on the basis of S8, removing the high-pressure oil pump, and then detecting the indicated work and the effective work of the engine;
s10: and (3) testing the friction work of the timing chain system: on the basis of S9, relevant parts of the timing chain and the chain system are removed;
the friction work of the engine at each step = indicated work of the engine at that step-effective work of the engine at that step.
Optionally, the crankshaft journal friction work = S2 friction work; the friction work of the oil pump = S3 friction work-S2 friction work; the piston assembly friction work = S4 friction work-S3 friction work; the friction work of the front end wheel train is = S5 friction work-S6 friction work; the friction work of the other motors = S5 friction work-S7 friction work; the water pump friction work = S7 friction work-S6 friction work; the valve train friction work = S6 friction work-S8 friction work; the friction work of the high-pressure oil pump is = S8 friction work-S9 friction work; the timing chain system friction work = S9 friction work-S10 friction work; the total friction work of the engine = crankshaft journal friction work, engine oil pump friction work, piston assembly friction work, front end wheel system friction work, other motor friction work, water pump friction work, valve system friction work, high-pressure oil pump friction work, timing chain system friction work and timing chain system friction work.
Optionally, the indicated work is tested by a cylinder pressure sensor, and the effective work is tested by a dynamometer.
Optionally, the oil passage related parts include a camshaft, a VCP, a cylinder head and a cylinder head cover.
Optionally, the crankshaft journal includes a connecting rod journal and a main journal.
Optionally, the piston assembly comprises a piston and piston rings.
Optionally, the engine oil temperature of the engine is controlled within the range of 95-105 degrees during the testing of the above steps.
Optionally, the engine speed during the testing of the above steps ranges from 1500rpm to 3000rpm.
In summary, the present invention includes at least one of the following beneficial effects:
1. the test result of the friction work of the engine tested by the step is more accurate, and an engineer can conveniently find the optimization direction of the engine.
Detailed Description
The embodiment of the invention discloses a method for testing the friction work of an engine.
An engine friction work testing method, comprising:
s1: test preparation: disassembling the engine and plugging the oil hole of the crankshaft connecting rod neck;
s2: testing the friction work of the crankshaft journal: only assembling a crankshaft for testing, adopting an external oil supply pump to supply oil, assembling parts related to an oil duct on an engine, adopting a tool to block an oil hole of the oil pump, and then detecting the indicating work and the effective work of the engine;
s3: testing the friction work of the oil pump: on the basis of S2, an oil pump is installed for testing, the oil pump of an external oil supply stops working, and then the indicating work and the effective work of the engine are detected;
s4: and (3) testing the friction work of the piston assembly: on the basis of S3, assembling a piston assembly, and then detecting the indicated work and the effective work of the engine;
s5: and (3) testing the friction work of the main journal: assembling all parts of the engine except an intake manifold, an exhaust manifold and a piston connecting rod assembly, blocking an oil hole of a crankshaft connecting rod neck, and then detecting the indicating work and the effective work of the engine;
s6: testing the friction work of the front-end wheel system: on the basis of S5, removing a front end wheel train belt, and then detecting the indicated work and the effective work of the engine;
s7: and (3) testing the friction work of other motors: on the basis of S6, only assembling a water pump belt, and then detecting the indicated work and the effective work of the engine;
s8: testing the friction work of the valve system: on the basis of S7, removing the valve and the spring, and then detecting the indicated work and the effective work of the engine;
s9: and (3) testing the friction work of the high-pressure oil pump: on the basis of S8, removing the high-pressure oil pump, and then detecting the indicated work and the effective work of the engine;
s10: and (3) testing the friction work of the timing chain system: on the basis of S9, relevant parts of the timing chain and the chain system are removed;
the indicating work is tested by the cylinder pressure sensor, and the effective work is tested by the dynamometer. The engine friction work of each step S2-S10 = indicated work of the engine of that step-effective work of the engine of that step.
The engine oil temperature during the test of the above steps is controlled within the range of 95-105 degrees, the engine speed during the test of the above steps is within the range of 1500rpm-3000rpm, in this embodiment, the engine oil temperature is 100 degrees, and the engine speed is 2000rpm. The friction work measured by the engine friction work is closer to the friction work of the actual operation of the engine, and an engineer can find the optimization direction more conveniently.
The oil passage related components include a camshaft, a VCP, a cylinder head, and a cylinder head cover. The crankshaft journal includes a connecting rod journal and a main journal. The piston assembly includes a piston and piston rings.
And (3) when the friction work of the crankshaft journal is calculated, the friction work of the crankshaft journal = the friction work calculated by S2.
When the oil pump friction work is calculated, the oil pump friction work = the friction work calculated in S3-the friction work calculated in S2.
Similarly, piston assembly friction work = S4 friction work-S3 friction work; the friction work of the front end wheel train is = S5 friction work-S6 friction work; friction work of other motors = S5 friction work-S7 friction work; water pump friction work = S7 friction work-S6 friction work; valve train friction work = S6 friction work-S8 friction work; the friction work of the high-pressure oil pump = S8 friction work-S9 friction work; the timing chain friction work = S9 friction work-S10 friction work.
The total friction work of the engine = crankshaft journal friction work, engine oil pump friction work, piston assembly friction work, front end wheel system friction work, other motor friction work, water pump friction work, valve system friction work, high-pressure oil pump friction work, timing chain system friction work and timing chain system friction work.
And calculating the friction work ratio of each part according to the test result, and determining the optimization direction according to the part ratio standard.
By adopting the testing steps of the invention, the engine can be completely decomposed, the friction work testing result is more accurate, and engineers can conveniently know which specific parts have large friction work, thereby finding the optimized direction and facilitating the later design optimization.
The above are all preferred embodiments of the present invention, and the protection scope of the present invention is not limited thereby, so: all equivalent changes made according to the structure, shape and principle of the invention are covered by the protection scope of the invention.
Claims (8)
1. A method for testing the friction work of an engine is characterized by comprising the following steps: the method comprises the following steps:
s1: test preparation: disassembling the engine and plugging the crankshaft connecting rod journal oil hole;
s2: testing the friction work of the crankshaft journal: only assembling a crankshaft for testing, adopting an external oil supply pump to supply oil, assembling parts related to an oil duct on an engine, adopting a tool to block an oil hole of the oil pump, and then detecting the indicating work and the effective work of the engine;
s3: testing the friction work of the oil pump: on the basis of S2, an oil pump is installed for testing, the oil pump of an external oil supply stops working, and then the indicating work and the effective work of the engine are detected;
s4: and (3) testing the friction work of the piston assembly: on the basis of S3, assembling a piston assembly, and then detecting the indicated work and the effective work of the engine;
s5: and (3) testing the friction work of the main journal: assembling all parts of the engine except an intake manifold, an exhaust manifold and a piston connecting rod assembly, blocking an oil hole of a crankshaft connecting rod neck, and then detecting the indicating work and the effective work of the engine;
s6: testing the friction work of the front-end wheel system: on the basis of S5, removing a front end wheel train belt, and then detecting the indicated work and the effective work of the engine;
s7: and (3) testing the friction work of other motors: on the basis of S6, only assembling a water pump belt, and then detecting the indicated work and the effective work of the engine;
s8: testing the friction work of the valve system: on the basis of S7, removing the valve and the spring, and then detecting the indicated work and the effective work of the engine;
s9: and (3) testing the friction work of the high-pressure oil pump: on the basis of S8, removing the high-pressure oil pump, and then detecting the indicated work and the effective work of the engine;
s10: and (3) testing the friction work of the timing chain system: on the basis of S9, relevant parts of the timing chain and the chain system are removed; the friction work of the engine at each step = indicated work of the engine at that step-effective work of the engine at that step.
2. The engine friction work test method according to claim 1, characterized in that: the crankshaft journal friction work = S2 friction work; the friction work of the oil pump = S3 friction work-S2 friction work; the piston assembly friction work = S4 friction work-S3 friction work; the friction work of the front end wheel train is = S5 friction work-S6 friction work; the friction work of the other motors = S5 friction work-S7 friction work; the water pump friction work = S7 friction work-S6 friction work; the valve train friction work = S6 friction work-S8 friction work; the friction work of the high-pressure oil pump is = S8 friction work-S9 friction work; the timing chain system friction work = S9 friction work-S10 friction work; the total friction work of the engine = crankshaft journal friction work + engine oil pump friction work + piston assembly friction work + front end wheel system friction work + other motor friction work + water pump friction work + valve system friction work + high pressure oil pump friction work + timing chain system friction work.
3. The engine frictional work test method according to claim 1, characterized in that: the indicated work is tested by a cylinder pressure sensor, and the effective work is tested by a dynamometer.
4. The engine friction work test method according to claim 1, characterized in that: the oil passage related components include a camshaft, a VCP, a cylinder head, and a cylinder head cover.
5. The engine friction work test method according to claim 1, characterized in that: the crankshaft journal comprises a connecting rod journal and a main journal.
6. The engine friction work test method according to claim 1, characterized in that: the piston assembly includes a piston and a piston ring.
7. The engine friction work test method according to claim 1, characterized in that: the engine oil temperature control range of the engine in the test process of the steps is 95-105 degrees.
8. The engine friction work test method according to claim 1, characterized in that: the engine speed during the test in the above step ranged from 1500rpm to 3000rpm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211368518.1A CN115700360A (en) | 2022-11-03 | 2022-11-03 | Engine friction work testing method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211368518.1A CN115700360A (en) | 2022-11-03 | 2022-11-03 | Engine friction work testing method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN115700360A true CN115700360A (en) | 2023-02-07 |
Family
ID=85121074
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202211368518.1A Pending CN115700360A (en) | 2022-11-03 | 2022-11-03 | Engine friction work testing method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN115700360A (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104122019A (en) * | 2014-07-23 | 2014-10-29 | 上汽通用五菱汽车股份有限公司 | Engine subsystem friction work measuring method |
| CN104502111A (en) * | 2014-11-24 | 2015-04-08 | 华晨汽车集团控股有限公司 | Engine friction work analysis device and method |
| CN109540533A (en) * | 2018-05-23 | 2019-03-29 | 中国汽车技术研究中心有限公司 | A kind of engine friction pumping loss decomposition method |
-
2022
- 2022-11-03 CN CN202211368518.1A patent/CN115700360A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104122019A (en) * | 2014-07-23 | 2014-10-29 | 上汽通用五菱汽车股份有限公司 | Engine subsystem friction work measuring method |
| CN104502111A (en) * | 2014-11-24 | 2015-04-08 | 华晨汽车集团控股有限公司 | Engine friction work analysis device and method |
| CN109540533A (en) * | 2018-05-23 | 2019-03-29 | 中国汽车技术研究中心有限公司 | A kind of engine friction pumping loss decomposition method |
Non-Patent Citations (1)
| Title |
|---|
| 张世康等编: "《热工与热机》", 30 November 1981, 北京：石油工业出版社, pages: 245 - 251 * |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN108350824B (en) | Method for combined recognition of phase differences between the strokes of a piston, an inlet valve and an outlet valve of an internal combustion engine | |
| CN109790789B (en) | Method for detecting a phase difference between an inlet valve stroke and an outlet valve stroke of an internal combustion engine | |
| CN111693291B (en) | Quantitative diagnosis method for combustion fault variable working condition of diesel engine based on vibration signal | |
| US20130087111A1 (en) | Internal combustion engine and method for control | |
| CN109973280A (en) | A kind of combustion knock automatic calibration method | |
| JPWO2012111145A1 (en) | Control device for internal combustion engine | |
| CN111133184B (en) | Method for checking the function of a pressure sensor in the intake or exhaust line section of an internal combustion engine and engine control unit | |
| CN102308072B (en) | Fault analysis method and fault analysis device for an internal combustion engine | |
| Gritsenko et al. | The Advancement of the Methods of Vibro-Acoustic Control of the ICE Gas Distribution Mechanism. | |
| CN115700360A (en) | Engine friction work testing method | |
| CN109506942B (en) | Method for analyzing correlation between engine cold test detection data and station by big data | |
| KR20140059205A (en) | Method and apparatus for controlling knock in an internal combustion engine | |
| JP6420915B2 (en) | Internal combustion engine control device | |
| US11401881B2 (en) | Fourier diagnosis of a charge cycle behavior of an internal combustion engine | |
| Witkowski | The increase of operational safety of ships by improving diagnostic methods for marine diesel engine | |
| Koeser et al. | Predictive Piston Cylinder Unit Simulation-Part I: Novel Findings on Cyclic Inter-Ring Pressure Measurements and Piston Ring Dynamic Simulation Validation | |
| US6055852A (en) | Method and apparatus for estimation of relative cylinder compression balance by cranking speed analysis | |
| JP2012013637A (en) | Adaptation method and adaptation device for engine control parameter | |
| Ariga et al. | On-line oil consumption measurement and characterization of an automotive gasoline engine by SO2 method | |
| CN110118521B (en) | Valve clearance rule measuring device and method in real engine working state | |
| US20210140838A1 (en) | Camshaft torque measurement arrangement | |
| Dąbrowski et al. | Identification of engine vibroacoustic model for diagnostics of mechanical defects | |
| JP5233660B2 (en) | Method for adapting control parameters of an internal combustion engine | |
| RU2534640C2 (en) | Evaluation of ice cylinder-piston assembly operating conditions | |
| Witkowski | Diagnosis of injection system marine diesel engine with the use of the heat release characteristics |
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 |