CN102589677A - 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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- CN102589677A CN102589677A CN2012100406317A CN201210040631A CN102589677A CN 102589677 A CN102589677 A CN 102589677A CN 2012100406317 A CN2012100406317 A CN 2012100406317A CN 201210040631 A CN201210040631 A CN 201210040631A CN 102589677 A CN102589677 A CN 102589677A
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- 238000000691 measurement method Methods 0.000 title abstract 3
- 230000001105 regulatory effect Effects 0.000 claims abstract description 45
- 239000000446 fuel Substances 0.000 claims abstract description 24
- 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
- 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
- 238000000429 assembly Methods 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 made up of valve actuating mechanism 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 influence 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 the top priority that the noisiness of injector assembly under the engine speed condition of different is its noise level of control.
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, and the utility model patent that name is called " a kind of fuel injector noise-measuring system " discloses wherein a kind of fuel injector noise-measuring system on May 19th, 2010, and this device comprises engine; Injector assembly is installed on the engine; Engine top and side are provided with microphone, drive fuel injector through relevant apparatus and work independently, and realize the measurement of injector assembly noise; There is following shortcoming in this measurement mechanism: (1) device is complicated, need 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 the support; Adopt the good ECU individual drive fuel injector work of brush; Carry out noise measurement; This device can only be measured the injector assembly noise under the rated engine speed at every turn, and the injector assembly noise under the energy measurement different rotating speeds not is if will measure the ECU that injector assembly noise under the different rotating speeds then need be demarcated different rotating speeds.
Summary of the invention
The objective of the invention is to overcome the deficiency of prior art; Provide a kind of versatility good; Can be applicable to different injector assembly noise testings, dirigibility is good, and the automobile injector assembly noise-measuring system and the measuring method thereof of the injector assembly noise under the energy measurement different rotating speeds.
To achieve these goals, the technical scheme of the present invention's employing is:
Said automobile injector assembly noise-measuring system comprises injector assembly and fuel pump, and fuel pump is connected with first D.C. regulated power supply, and an end of injector assembly is connected with fuel pump through oil pipe; Also comprise adjustable for height support, support reaches the montant that is connected with cross bar by cross bar and constitutes, and the montant bottom is connected on the surface level; Injector assembly is fixed on the cross bar, and injector assembly is parallel to surface level; The other end of injector assembly is connected with the simulative automobile driver through solenoid valve; The simulative automobile driver is connected with second D.C. regulated power supply and ECU; Directly over cross bar, be provided with first microphone, said first microphone is perpendicular to the injector assembly setting; Be provided with second microphone in the injector assembly that is provided with solenoid valve one side, said second microphone is perpendicular to the injector assembly setting.
Said second microphone equates to the horizontal plane with the injector assembly center to the distance of surface level.
Said injector assembly is fixed through the additional fixation device that is suspended on the cross bar; Said additional fixation device is that an end is connected the elastic pull bar on the cross bar, and the pull bar other end is connected with injector assembly.
Said oil pipe is connected on montant and the cross bar through stationary installation, and said stationary installation is the buckle that is located on cross bar and the montant.
Said montant is provided with the regulating device of the height of regulating montant.
Said regulating device is the set screw that is arranged on the montant.
The measuring method of described automobile injector assembly noise-measuring system may further comprise the steps;
(1) chooses injector assembly; Injector assembly is in place, opens first D.C. regulated power supply and second D.C. regulated power supply, regulate the simulative automobile driver then to first rotating speed; Utilize ECU programmed control injector assembly oil spout frequency; Measure the noise at first microphone and the second microphone place, analyze the noisiness of injector assembly under first rotating speed, record data;
(2) rotating speed of re-adjustments simulative automobile driver is measured the noise of injector assembly under the rotating speed condition of different of simulative automobile driver, record data;
(3) close first D.C. regulated power supply and second D.C. regulated power supply; Choose the injector assembly that different oily rails, different fuel injector are combined into, injector assembly is in place, regulate the montant height and regulate injector assembly and makes the relative position of injector assembly and first microphone and second microphone meet the requirements; Open first direct supply and second direct supply then; Regulate the simulative automobile driver and arrive first rotating speed in the step (1), utilize ECU programmed control injector assembly oil spout frequency, measure the noise at first microphone and the second microphone place; Analyze the noisiness of injector assembly under first rotating speed, record data;
(4) noise of injector assembly under the rotating speed condition of different of simulative automobile driver in the rotating speed of re-adjustments simulative automobile driver, measuring process (3), record data are accomplished test.
Said automobile injector assembly noise-measuring system and measuring method, the technical scheme of employing compared with prior art, has the following advantages:
At first; Said automobile injector assembly noise-measuring system; Can measure the noise of injector assembly under the engine speed condition of different, test result can be used for analyzing and estimating the noisiness under the injector assembly different rotating speeds, for the injector assembly structure optimization provides foundation;
Secondly, said automobile injector assembly noise-measuring system need not adopt special-purpose engine, and can accomplish 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, said 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 to adjust repeatedly the position of first microphone and second microphone, and convenient test, dirigibility is good.
The measuring method of said automobile injector assembly noise-measuring system utilizes said 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
Face the content of each width of cloth accompanying drawing expression of instructions of the present invention and the mark among the figure down and make brief description:
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 second microphone of Fig. 1 automobile injector assembly noise-measuring system;
Mark among the above-mentioned figure is:
1, fuel pump, 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, second D.C. regulated power supply, 11, ECU, 12, first microphone, 13, second microphone.
Embodiment
Contrast accompanying drawing below, through the description to optimum embodiment, specific embodiments of the invention is done further detailed explanation.
Extremely shown in Figure 3 like Fig. 1; Said automobile injector assembly noise-measuring system; Comprise injector assembly 8 and fuel pump 1; Fuel pump 1 is connected with first D.C. regulated power supply 2, and an end of injector assembly 8 is connected with fuel pump 1 through oil pipe, provides power drive fuel pump 1 to pass through oil pipe to injector assembly 8 fuel feeding by first D.C. regulated power supply 2; Also comprise adjustable for height support, support reaches the montant 3 that is connected with cross bar 5 by cross bar 5 and constitutes, and montant 3 bottoms are connected on the surface level, regulate the adjusting that realizes support height through the height of montant 3; Injector assembly 8 is fixed on the cross bar 5, and injector assembly 8 is parallel to surface level; Oil pipe is connected on montant 3 and the cross bar 5 through stationary installation 6; Injector assembly 8 is fixing through the additional fixation device 7 that is suspended on the 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 through solenoid valve; Simulative automobile driver 9 is connected with second D.C. regulated power supply 10 and the ECU11; Simulative automobile driver 9 can simulated engine different rotating speeds, injector assembly 8 noises under the test different engine; Second D.C. regulated power supply 10 provides power drives simulative automobile driver 9, and simulative automobile driver 9 is through 8 work of solenoid control injector assembly, and ECU11 is through formulating the oil spout frequency of good programmed control injector assembly 8; Can regulate different rotating speeds through simulative automobile driver 9, measure injector assembly 8 noises under the different rotating speeds; Directly over the cross bar 5 of fixing fuel injector assembly 8, be provided with first microphone, 12, the first microphones 12 and be provided with, can just measure the noise of injector assembly 8 like this in vertical direction perpendicular to injector assembly 8; Being provided with second microphone, 13, the second microphones 13 in the injector assembly that is provided with solenoid valve 8 one sides is provided with perpendicular to injector assembly 8; Second microphone 13 equates to the horizontal plane with injector assembly 8 centers to the distance of surface level, can guarantee better to measure the noise on injector assembly 8 horizontal directions like this.
Stationary installation 6 is for being located at the buckle on cross bar 5 and the montant 3; Additional fixation device 7 is that an end is connected the elastic pull bar on the 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 scalable montant 3, and injector assembly 8 is through the effect of the regulating device on the montant 3; Between injector assembly 8 centers and surface level apart from scalable, when changing different injector assemblies 8 and carry out noise testing, need not move first microphone 12 and second microphone 13 comes adjustable range; And only need regulate montant 3 highly; And then the adjustment injector assembly 8 get final product, measurement result accurately and reliably, the measurement data good comparability; Regulating device is the set screw that is arranged on the montant 3, unclamps set screw when needing to regulate montant 3 height, makes montant 3 move down in vertical direction, and the set screw of behind montant 3 arrival precalculated positions, screwing fixedly montant 3 gets final product.
The measuring method of said automobile injector assembly noise-measuring system may further comprise the steps;
(1) chooses injector assembly; Injector assembly is in place, opens first D.C. regulated power supply and second D.C. regulated power supply, regulate the simulative automobile driver then to first rotating speed; Utilize ECU programmed control injector assembly oil spout frequency; Measure the noise at first microphone and the second microphone place, analyze the noisiness of injector assembly under first rotating speed, record data;
(2) close first D.C. regulated power supply, regulate the simulative automobile driver, open first D.C. regulated power supply then, measure the noise at first microphone and the second microphone place, analyze the noisiness of injector assembly under this second rotating speed to second rotating speed; Close first D.C. regulated power supply, regulate simulative automobile driver to the three rotating speeds, open first D.C. regulated power supply then, measure the noise at 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 the noise of injector assembly under simulative automobile driver rotating speed condition of different, record data;
(3) close first D.C. regulated power supply and second D.C. regulated power supply; Choose the injector assembly that different oily rails, different fuel injector are combined into, injector assembly is in place, regulate the montant height and regulate injector assembly and makes the relative position of injector assembly and first microphone and second microphone meet the requirements; Open first D.C. regulated power supply and second D.C. regulated power supply then; Regulate the simulative automobile driver and arrive first rotating speed in the step (1), utilize ECU programmed control injector assembly oil spout frequency, measure the noise at first microphone and the second microphone place; Analyze the noisiness of this injector assembly under first rotating speed, record data;
(4) close first D.C. regulated power supply; Regulate the simulative automobile driver to second rotating speed; Open first D.C. regulated power supply then, measure the noise at first microphone and the second microphone place, the noisiness of injector assembly under this second rotating speed in the analytical procedure (3); Close first D.C. regulated power supply, regulate simulative automobile driver to the three rotating speeds, open first D.C. regulated power supply then, measure the noise at first microphone and the second microphone place, the noisiness of injector assembly under this 3rd rotating speed in the analytical procedure (3); The noise of injector assembly under simulative automobile driver rotating speed condition of different in the rotating speed of re-adjustments simulative automobile driver, measuring process (3), record data are accomplished test.
Above the present invention has been carried out exemplary description; Obviously the concrete realization of the present invention does not receive the restriction of aforesaid way; As long as adopted the improvement of the various unsubstantialities that method of the present invention design and technical scheme carry out; Or design of the present invention and technical scheme are directly applied to other occasion without improving, all within protection scope of the present invention.
Claims (7)
1. an automobile injector assembly noise-measuring system comprises injector assembly (8) and fuel pump (1), and fuel pump (1) is connected with first D.C. regulated power supply (2), and an end of injector assembly (8) is connected with fuel pump (1) through oil pipe; It is characterized in that: also comprise adjustable for height support, support reaches the montant (3) that is connected with cross bar (5) by cross bar (5) and constitutes, and montant (3) bottom is connected on the surface level; Injector assembly (8) is fixed on the 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) through solenoid valve; Simulative automobile driver (9) is connected with second D.C. regulated power supply (10) and ECU (11); Directly over said cross bar (5), be provided with first microphone (12), said first microphone (12) is provided with perpendicular to injector assembly (8); Be provided with second microphone (13) in the injector assembly that is provided with solenoid valve (8) one sides, said second microphone (13) is provided with perpendicular to injector assembly (8).
2. according to the described automobile injector assembly of claim 1 noise-measuring system, it is characterized in that: said second microphone (13) equates to the horizontal plane with injector assembly (8) center to the distance of surface level.
3. according to claim 1 or 2 described automobile injector assembly noise-measuring systems, it is characterized in that: said injector assembly (8) is fixing through the additional fixation device (7) that is suspended on the cross bar (5); Said additional fixation device (7) is that an end is connected the elastic pull bar on the cross bar (5), and the pull bar other end is connected with injector assembly (8).
4. according to the described automobile injector assembly of claim 3 noise-measuring system, it is characterized in that: said oil pipe is connected on montant (3) and the cross bar (5) through stationary installation (6), and said stationary installation (6) is for being located at the buckle on cross bar (5) and the montant (3).
5. according to the described automobile injector assembly of claim 4 noise-measuring system, it is characterized in that: said montant (3) is provided with the regulating device of the height of regulating montant (3).
6. according to the described automobile injector assembly of claim 5 noise-measuring system, it is characterized in that: said regulating device is for being arranged at the set screw on the montant (3).
7. the measuring method of the described automobile injector assembly of claim 1 noise-measuring system is characterized in that: may further comprise the steps;
(1) chooses injector assembly; Injector assembly is in place, opens first D.C. regulated power supply and second D.C. regulated power supply, regulate the simulative automobile driver then to first rotating speed; Utilize ECU programmed control injector assembly oil spout frequency; Measure the noise at first microphone and the second microphone place, analyze the noisiness of injector assembly under first rotating speed, record data;
(2) rotating speed of re-adjustments simulative automobile driver is measured the noise of injector assembly under the rotating speed condition of different of simulative automobile driver, record data;
(3) close first D.C. regulated power supply and second D.C. regulated power supply; Choose the injector assembly that different oily rails, different fuel injector are combined into, injector assembly is in place, regulate the montant height and regulate injector assembly and makes the relative position of injector assembly and first microphone and second microphone meet the requirements; Open first direct supply and second direct supply then; Regulate the simulative automobile driver and arrive first rotating speed in the step (1), utilize ECU programmed control injector assembly oil spout frequency, measure the noise at first microphone and the second microphone place; Analyze the noisiness of injector assembly under first rotating speed, record data;
(4) noise of injector assembly under the rotating speed condition of different of simulative automobile driver in the rotating speed of re-adjustments simulative automobile driver, measuring process (3), record data are accomplished test.
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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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 |
| CN105699085A (en) * | 2016-01-15 | 2016-06-22 | 重庆长安汽车股份有限公司 | Engine air inlet noise sound power test system and test method thereof |
| CN107436240A (en) * | 2017-09-26 | 2017-12-05 | 重庆长安汽车股份有限公司 | Oily rail assembly monomer NVH method of evaluating performance |
| 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 |
| CN108871791A (en) * | 2018-06-28 | 2018-11-23 | 奇瑞汽车股份有限公司 | A kind of automobile starting noise-measuring system and test method |
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| Publication number | Priority date | Publication date | Assignee | Title |
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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 |
| CN105699085A (en) * | 2016-01-15 | 2016-06-22 | 重庆长安汽车股份有限公司 | Engine air inlet noise sound power test system and test method thereof |
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| CN107436240A (en) * | 2017-09-26 | 2017-12-05 | 重庆长安汽车股份有限公司 | Oily rail assembly monomer NVH method of evaluating performance |
| 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 |
| CN108871791A (en) * | 2018-06-28 | 2018-11-23 | 奇瑞汽车股份有限公司 | A kind of automobile starting noise-measuring system and test method |
| 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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| CN102589677B (en) | 2013-11-06 |
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