CN102589677B - Automobile injector assembly noise measurement device and automobile injector assembly noise measurement method - Google Patents
Automobile injector assembly noise measurement device and automobile injector assembly noise measurement method Download PDFInfo
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- 230000001105 regulatory effect Effects 0.000 claims abstract description 50
- 239000000446 fuel Substances 0.000 claims abstract description 22
- 238000012360 testing method Methods 0.000 claims abstract description 14
- 238000000034 method Methods 0.000 claims description 12
- 238000009434 installation Methods 0.000 claims description 8
- 230000015572 biosynthetic process Effects 0.000 claims 1
- 238000004088 simulation Methods 0.000 abstract 2
- 239000012467 final product Substances 0.000 description 3
- 238000004458 analytical method Methods 0.000 description 2
- 230000000712 assembly Effects 0.000 description 1
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Abstract
The invention discloses an automobile injector assembly noise measurement device and an automobile injector assembly noise measurement method. The measurement device comprises an injector assembly and a fuel pump, wherein the fuel pump is connected with a first direct current (DC) regulated power supply; one end of the injector assembly is connected with the fuel pump by an oil pipe; the measurement device also comprises a bracket with adjustable height; the bracket comprises a cross rod and a vertical rod connected with the cross rod; the bottom end of the vertical rod is connected on the horizontal plane; the injector assembly is fixed on the cross rod; the injector assembly is parallel to the horizontal plane; the other end of the injector assembly is connected with an automobile simulation driver by an electromagnetic valve; the automobile simulation driver is connected with a second DC regulated power supply and an electronic control unit (ECU); a first microphone is arranged just above the cross rod, and is vertical to the injector assembly; a second microphone is arranged at one side of the injector assembly provided with the electromagnetic valve; and the second microphone is vertical to the injector assembly. The measurement method is realized by utilizing the measurement device, and comprises four steps. The invention is high in universality and simple and accurate in test.
Description
Technical field
The present invention relates to the automobile noise measurement mechanism, be specifically related to a kind of automobile injector assembly noise-measuring system and measuring method thereof.
Background technology
The engine mechanical noise is the main source of automobile noise, and the engine mechanical noise mainly partly is comprised of valve train noise, grating of gears, piston knock noise, injector assembly noise, component vibration noise etc.Engine is when idling, the noise level that other noise sources cause is generally lower, and it is comparatively remarkable that the injector assembly noise becomes the medium-high frequency section impact of important noise source, especially a 2K-20KHz at this moment, have a strong impact on the sound pressure level harmony quality of engine, become the main object of client's complaint.Therefore control the injector assembly noise level, engine NVH quality is significant for promoting, and measures injector assembly in the situation that the different noisiness of engine speed is to control the top priority of its noise level.
the measurement mechanism that the measurement of injector assembly noise is at present adopted usually comprises two kinds of structures, publication number is CN200920172352.X, the utility model patent that name is called " a kind of noise measuring apparatus of oil sprayer " discloses wherein a kind of noise measuring apparatus of oil sprayer on May 19th, 2010, this device comprises engine, injector assembly is installed on engine, engine top and side are provided with microphone, driving fuel injector by relevant apparatus works independently, realize the measurement of injector assembly noise, there is following shortcoming in this measurement mechanism: (1) device is complicated, need to prepare special-purpose engine during measurement, (2) versatility is poor, can only measure the noise with the specific injector assembly of Engine Matching, (3) controllability is poor, can not the flexible injector assembly and microphone and ground between distance, measure inconvenient, another kind of injector assembly noise-measuring system is that injector assembly is fixed on support, the ECU that employing brushes drives separately fuel injector work, carry out noise measurement, this device can only be measured the injector assembly noise under rated engine speed at every turn, can not measure the injector assembly noise under different rotating speeds, if will measure the ECU that injector assembly noise under different rotating speeds needs to demarcate different rotating speeds.
Summary of the invention
The object of the invention is to overcome the deficiencies in the prior art, provide a kind of versatility good, can be applicable to different injector assembly noise testings, dirigibility is good, and can measure automobile injector assembly noise-measuring system and the measuring method thereof of the injector assembly noise under different rotating speeds.
To achieve these goals, the technical solution used in the present invention is:
Described automobile injector assembly noise-measuring system comprises injector assembly and fuel pump, and fuel pump is connected with the first D.C. regulated power supply, and an end of injector assembly is connected with fuel pump by oil pipe; Also comprise adjustable for height support, support is made of cross bar and the montant that is connected with cross bar, and the montant bottom is connected on surface level; Injector assembly is fixed on cross bar, and injector assembly is parallel to surface level; The other end of injector assembly is connected with the simulative automobile driver by solenoid valve; The simulative automobile driver is connected with the second D.C. regulated power supply and ECU; Be provided with the first microphone directly over cross bar, described the first microphone is perpendicular to the injector assembly setting; Be provided with the second microphone in injector assembly one side that is provided with solenoid valve, described the second microphone is perpendicular to the injector assembly setting.
Described the second microphone equates to the horizontal plane with the injector assembly center to the distance of surface level.
Described injector assembly is fixed by the additional fixation device that is suspended on cross bar; Described additional fixation device is that an end is connected to the elastic pull bar on cross bar, and the pull bar other end is connected with injector assembly.
Described oil pipe is connected on montant and cross bar by stationary installation, and described stationary installation is the buckle that is located on cross bar and montant.
Described montant is provided with the regulating device of the height of regulating montant.
Described regulating device is the set screw that is arranged on montant.
The measuring method of described automobile injector assembly noise-measuring system comprises the following steps;
(1) choose injector assembly, injector assembly is in place, open the first D.C. regulated power supply and the second D.C. regulated power supply, then the vehicles analog driver is to the first rotating speed, utilize ECU programmed control injector assembly oil spout frequency, measure the noise at the first microphone and the second microphone place, analyze the noisiness of injector assembly under the first rotating speed, record data;
(2) rotating speed of re-adjustments simulative automobile driver is measured injector assembly in the situation that the different noise of the rotating speed of simulative automobile driver, record data;
(3) close the first D.C. regulated power supply and the second D.C. regulated power supply, choose different oily rails, the injector assembly that different fuel injectors are combined into, injector assembly is in place, adjusting montant height is regulated injector assembly and is made the relative position of injector assembly and the first microphone and the second microphone meet the requirements, then open the first direct supply and the second direct supply, the vehicles analog driver arrives the first rotating speed in step (1), utilize ECU programmed control injector assembly oil spout frequency, measure the noise at the first microphone and the second microphone place, analyze the noisiness of injector assembly under the first rotating speed, record data,
(4) rotating speed of re-adjustments simulative automobile driver, injector assembly in measuring process (3) are in the situation that the different noise of the rotating speed of simulative automobile driver, and record data are completed test.
Described automobile injector assembly noise-measuring system and measuring method, the technical scheme of employing compared with prior art, has the following advantages:
At first, described automobile injector assembly noise-measuring system, can measure injector assembly in the situation that the different noise of engine speed, test result can be used for analyzing and estimate the noisiness under the injector assembly different rotating speeds, for the injector assembly structure optimization provides foundation;
Secondly, described automobile injector assembly noise-measuring system does not need to adopt special-purpose engine, and can complete the injector assembly noise measurement of different size; Its applicability and highly versatile, and simple in structure, handling ease, cost is low, and is easy to use, have test simply, advantage accurately and efficiently;
At last, described automobile injector assembly noise-measuring system is when the injector assembly noise of test different size, the position that only needs to regulate support height adjusting injector assembly gets final product, and do not need repeatedly to adjust the position of the first microphone and the second microphone, and convenient test, dirigibility is good.
The measuring method of described automobile injector assembly noise-measuring system utilizes described automobile injector assembly noise-measuring system to realize, has that to measure dirigibility good, and versatility is high, test simply, advantage accurately and efficiently.
Description of drawings
The below is briefly described the content of each width accompanying drawing expression of instructions of the present invention and the mark in figure:
Fig. 1 is the structural representation of automobile injector assembly noise-measuring system of the present invention;
Fig. 2 is the structural representation of the injector assembly of Fig. 1 automobile injector assembly noise-measuring system;
Fig. 3 is the structural representation of the second microphone of Fig. 1 automobile injector assembly noise-measuring system;
Mark in above-mentioned figure is:
1, fuel pump, the 2, first D.C. regulated power supply, 3, montant, 4, regulating device, 5, cross bar, 6, stationary installation, 7, additional fixation device, 8, injector assembly, 9, the simulative automobile driver, 10, the second D.C. regulated power supply, 11, ECU, the 12, first microphone, the 13, second microphone.
Embodiment
The below contrasts accompanying drawing, and the description by to optimum embodiment is described in further detail the specific embodiment of the present invention.
As shown in Figure 1 to Figure 3, described automobile injector assembly noise-measuring system, comprise injector assembly 8 and fuel pump 1, fuel pump 1 is connected with the first D.C. regulated power supply 2, one end of injector assembly 8 is connected with fuel pump 1 by oil pipe, by the first D.C. regulated power supply 2 provide power drive fuel pump 1 by oil pipe to injector assembly 8 fuel feeding; Also comprise adjustable for height support, support is made of cross bar 5 and the montant 3 that is connected with cross bar 5, and montant 3 bottoms are connected on surface level, realize the adjusting of support height by the height adjusting of montant 3; Injector assembly 8 is fixed on cross bar 5, and injector assembly 8 is parallel to surface level; Oil pipe is connected on montant 3 and cross bar 5 by stationary installation 6; Injector assembly 8 is fixing by the additional fixation device 7 that is suspended on cross bar 5; Cross bar 5, montant 3, stationary installation 6 and additional fixation device 7 constitute the easily-testing stand, can be applicable to injector assembly 8 noise testings that different oily rails, different fuel injector combine; The other end of injector assembly 8 is connected with simulative automobile driver 9 by solenoid valve; Simulative automobile driver 9 is connected with the second D.C. regulated power supply 10 and ECU11; Simulative automobile driver 9 can simulated engine different rotating speeds, injector assembly 8 noises under the test different engine; The second D.C. regulated power supply 10 provides power drives simulative automobile driver 9, and simulative automobile driver 9 is by 8 work of solenoid control injector assembly, and ECU11 is by the oil spout frequency of the programmed control injector assembly 8 that makes; Can regulate different rotating speeds by simulative automobile driver 9, measure injector assembly 8 noises under different rotating speeds; Be provided with the first microphone 12, the first microphones 12 and arrange perpendicular to injector assembly 8 directly over the cross bar 5 of fixing fuel injector assembly 8, can just measure like this injector assembly 8 at the noise of vertical direction; Being provided with the second microphone 13, the second microphones 13 in injector assembly 8 one sides that are provided with solenoid valve arranges perpendicular to injector assembly 8; The second microphone 13 equates to the horizontal plane with injector assembly 8 centers to the distance of surface level, can guarantee so better to measure the noise on injector assembly 8 horizontal directions.
Stationary installation 6 is for being located at the buckle on cross bar 5 and montant 3; Additional fixation device 7 is that an end is connected to the elastic pull bar on cross bar 5, and the pull bar other end is connected with injector assembly 8; Additional fixation device 7 makes injector assembly 8 remain parallel to the state of surface level; Montant 3 is provided with regulating device, the height of regulating device adjustable vertical bar 3, injector assembly 8 is by the effect of the regulating device on montant 3, distance between injector assembly 8 centers and surface level can be regulated, and when changing different injector assemblies 8 and carry out noise testing, need not move the first microphone 12 and the second microphone 13 comes adjustable range, and only need regulate montant 3 highly, and then adjust injector assembly 8 and get final product, measurement result accurately and reliably, the measurement data good comparability; Regulating device is the set screw that is arranged on montant 3, unclamp set screw when need regulating montant 3 height, makes montant 3 lower mobile in vertical direction, screw after montant 3 arrives the precalculated position set screw fixedly montant 3 get final product.
The measuring method of described automobile injector assembly noise-measuring system comprises the following steps;
(1) choose injector assembly, injector assembly is in place, open the first D.C. regulated power supply and the second D.C. regulated power supply, then the vehicles analog driver is to the first rotating speed, utilize ECU programmed control injector assembly oil spout frequency, measure the noise at the first microphone and the second microphone place, analyze the noisiness of injector assembly under the first rotating speed, record data;
(2) close the first D.C. regulated power supply, then the vehicles analog driver opens the first D.C. regulated power supply to the second rotating speed, measures the noise at the first microphone and the second microphone place, analyzes the noisiness of injector assembly under this second rotating speed; Close the first D.C. regulated power supply, then vehicles analog driver to the three rotating speeds open the first D.C. regulated power supply, measure the noise at the first microphone and the second microphone place, analyze the noisiness of injector assembly under this 3rd rotating speed; The rotating speed of re-adjustments simulative automobile driver is measured injector assembly in the situation that the different noise of simulative automobile driver rotating speed, record data;
(3) close the first D.C. regulated power supply and the second D.C. regulated power supply, choose different oily rails, the injector assembly that different fuel injectors are combined into, injector assembly is in place, adjusting montant height is regulated injector assembly and is made the relative position of injector assembly and the first microphone and the second microphone meet the requirements, then open the first D.C. regulated power supply and the second D.C. regulated power supply, the vehicles analog driver arrives the first rotating speed in step (1), utilize ECU programmed control injector assembly oil spout frequency, measure the noise at the first microphone and the second microphone place, analyze the noisiness of this injector assembly under the first rotating speed, record data,
(4) close the first D.C. regulated power supply, the vehicles analog driver is to the second rotating speed, then open the first D.C. regulated power supply, measure the noise at the first microphone and the second microphone place, the noisiness of injector assembly under this second rotating speed in analytical procedure (3); Close the first D.C. regulated power supply, vehicles analog driver to the three rotating speeds, then open the first D.C. regulated power supply, measure the noise at the first microphone and the second microphone place, the noisiness of injector assembly under this 3rd rotating speed in analytical procedure (3); The rotating speed of re-adjustments simulative automobile driver, injector assembly in measuring process (3) are in the situation that the different noise of simulative automobile driver rotating speed, and record data are completed test.
The above is exemplarily described the present invention; obviously specific implementation of the present invention is not subject to the restrictions described above; as long as adopted the improvement of the various unsubstantialities that method of the present invention design and technical scheme carry out; or without improving, design of the present invention and technical scheme are directly applied to other occasion, all within protection scope of the present invention.
Claims (7)
1. automobile injector assembly noise-measuring system, comprise injector assembly (8) and fuel pump (1), fuel pump (1) is connected with the first D.C. regulated power supply (2), and an end of injector assembly (8) is connected with fuel pump (1) by oil pipe; It is characterized in that: also comprise adjustable for height support, support is by cross bar (5) and the montant (3) that is connected with cross bar (5) formation, and montant (3) bottom is connected on surface level; Injector assembly (8) is fixed on cross bar (5), and injector assembly (8) is parallel to surface level; The other end of injector assembly (8) is connected with simulative automobile driver (9) by solenoid valve; Simulative automobile driver (9) is connected with the second D.C. regulated power supply (10) and ECU (11); Be provided with the first microphone (12) directly over described cross bar (5), described the first microphone (12) arranges perpendicular to injector assembly (8); Be provided with the second microphone (13) in injector assembly (8) one sides that are provided with solenoid valve, described the second microphone (13) arranges perpendicular to injector assembly (8).
2. according to automobile injector assembly noise-measuring system claimed in claim 1, it is characterized in that: described the second microphone (13) equates to the horizontal plane with injector assembly (8) center to the distance of surface level.
3. according to the described automobile injector assembly of claim 1 or 2 noise-measuring system, it is characterized in that: described injector assembly (8) is fixing by the additional fixation device (7) that is suspended on cross bar (5); Described additional fixation device (7) is that an end is connected to the elastic pull bar on cross bar (5), and the pull bar other end is connected with injector assembly (8).
4. according to automobile injector assembly noise-measuring system claimed in claim 3, it is characterized in that: described oil pipe is connected on montant (3) and cross bar (5) by stationary installation (6), and described stationary installation (6) is for being located at the buckle on cross bar (5) and montant (3).
5. according to automobile injector assembly noise-measuring system claimed in claim 4, it is characterized in that: described montant (3) is provided with the regulating device of the height of regulating montant (3).
6. according to automobile injector assembly noise-measuring system claimed in claim 5, it is characterized in that: described regulating device is for being arranged at the set screw on montant (3).
7. the measuring method of an automobile injector assembly noise-measuring system claimed in claim 1, is characterized in that: comprise the following steps;
(1) choose injector assembly, injector assembly is in place, open the first D.C. regulated power supply and the second D.C. regulated power supply, then the vehicles analog driver is to the first rotating speed, utilize ECU programmed control injector assembly oil spout frequency, measure the noise at the first microphone and the second microphone place, analyze the noisiness of injector assembly under the first rotating speed, record data;
(2) rotating speed of re-adjustments simulative automobile driver is measured injector assembly in the situation that the different noise of the rotating speed of simulative automobile driver, record data;
(3) close the first D.C. regulated power supply and the second D.C. regulated power supply, choose different oily rails, the injector assembly that different fuel injectors are combined into, injector assembly is in place, adjusting montant height is regulated injector assembly and is made the relative position of injector assembly and the first microphone and the second microphone meet the requirements, then open the first direct supply and the second direct supply, the vehicles analog driver arrives the first rotating speed in step (1), utilize ECU programmed control injector assembly oil spout frequency, measure the noise at the first microphone and the second microphone place, analyze the noisiness of injector assembly under the first rotating speed, record data,
(4) rotating speed of re-adjustments simulative automobile driver, injector assembly in measuring process (3) are in the situation that the different noise of the rotating speed of simulative automobile driver, and record data are completed test.
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Families Citing this family (6)
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| CN103712683A (en) * | 2013-12-23 | 2014-04-09 | 哈尔滨东安汽车动力股份有限公司 | Noise measurement apparatus for fuel rail fuel injector for gasoline engine |
| CN105092025A (en) * | 2015-09-16 | 2015-11-25 | 重庆长安汽车股份有限公司 | Engine fuel oil manifold assembly noise test method and test system thereof |
| CN105699085B (en) * | 2016-01-15 | 2018-07-13 | 重庆长安汽车股份有限公司 | A kind of engine intake Noisy acoustic power test system and test method |
| CN108122560A (en) * | 2016-11-28 | 2018-06-05 | 华晨汽车集团控股有限公司 | A kind of system and method for extracting engine noise tone degree |
| CN107436240B (en) * | 2017-09-26 | 2019-03-22 | 重庆长安汽车股份有限公司 | Oily rail assembly monomer NVH method of evaluating performance |
| CN108871791B (en) * | 2018-06-28 | 2020-08-04 | 奇瑞汽车股份有限公司 | Automobile starting noise testing device and testing method |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JPH0862085A (en) * | 1994-08-19 | 1996-03-08 | Fujitsu Ltd | Liquid supply monitoring device and method |
| JP2920355B2 (en) * | 1995-06-13 | 1999-07-19 | 株式会社クリハラント | Vibration meter adjustment method |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101187571A (en) * | 2006-10-11 | 2008-05-28 | 三星电子株式会社 | System and method for measuring the degree of wobble of image display device |
| CN201476874U (en) * | 2009-06-01 | 2010-05-19 | 奇瑞汽车股份有限公司 | Noise measuring apparatus of oil sprayer |
| KR101105743B1 (en) * | 2010-10-27 | 2012-01-17 | 한국철도기술연구원 | Vertical geophone with automatic alignment correction and noise control, and borehole apparatus having vertical geophone for measuring ground-bore vibration |
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