CN100489481C - Automobile absorber damping force indisintegrated quick-measuring method - Google Patents
Automobile absorber damping force indisintegrated quick-measuring method Download PDFInfo
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- CN100489481C CN100489481C CNB2005100296410A CN200510029641A CN100489481C CN 100489481 C CN100489481 C CN 100489481C CN B2005100296410 A CNB2005100296410 A CN B2005100296410A CN 200510029641 A CN200510029641 A CN 200510029641A CN 100489481 C CN100489481 C CN 100489481C
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- damping force
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- shock absorber
- vehicle shock
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Abstract
This invention provides non-disintegrating quick test method for vibration damper force, the test can be completed in five minutes without dismounting the vibration damper from car.
Description
Technical field:
The invention belongs to automotive field, it relates to a kind of to automobile absorber damping force undisintegrated quick-measuring method.
Background technology:
Vehicle shock absorber plays crucial effect for vehicle handling stability, and the vehicle shock absorber damping force adopted mostly in the past and vehicle shock absorber is disassembled the back from automobile utilizes conventional specialized equipment to test, there is the shortcoming that wastes time and energy like this, is not easy to Auto repair shop's operation.
Summary of the invention:
Just must disassemble the test shortcoming that can waste time and energy from automobile in order to solve vehicle shock absorber, the invention provides a kind of automobile absorber damping force undisintegrated quick-measuring method.
The technical scheme of technical solution problem of the present invention is as follows:
Automobile absorber damping force undisintegrated quick-measuring method of the present invention is characterized in that comprising the following steps:
1) automotive wheel P is anchored on the testing stand 4 of weighing;
2) repeatedly firmly push body of a motor car Q with hand, fast hand is unclamped from body of a motor car Q then, make body of a motor car Q produce up-down vibration more than 10 times, vibration frequency is 1Hz～2Hz;
3) gather and preserve step 2 with the universal industrial Control Software that is equipped with in A/D capture card that is equipped with in the computing machine 5 and computing machine 5 storeies) in the test curve 1 of displacement transducer 1 in last 2 seconds and the test curve 3 of LOAD CELLS 3, and the average of calculating test curve 3, test curve 1 is carried out calculus of differences try to achieve test curve 2;
4) draw vehicle shock absorber by the maximal value of test curve 2 and be in the damper piston maximal rate c of extension during the stage
sUnit is m/s, finds on test curve 3 corresponding to damper piston maximal rate c then
sThe time automotive wheel P act on vertical direction acting force b on the testing stand 4 of weighing
sThe N of unit deducts b with the average of test curve 3
sCan try to achieve vehicle shock absorber and be in extension stage damper piston maximal rate c
sThe time absorber damping force F
s,,, utilize formula [1] to obtain the modified value F of absorber damping force by computing machine 5 in order to reduce test error according to practical experience
S0
F
s0＝0.3F
s/c
s [1]
Damper piston maximal rate c when 5) drawing vehicle shock absorber and be in compression stage by the minimum value of test curve 2
pUnit is m/s, finds on test curve 3 corresponding to damper piston maximal rate c then
pThe time automotive wheel P act on vertical direction acting force b on the testing stand 4 of weighing
pUnit is N, and the average of test curve 3 is deducted b
pCan try to achieve vehicle shock absorber and be in compression stage damper piston maximal rate c
pThe time absorber damping force F
p,,, utilize formula [2] to obtain the modified value F of absorber damping force by computing machine 5 in order to reduce test error according to practical experience
P0
F
p0＝0.3F
p/c
p [2]
6) uphold the modified value F of the absorber damping force in stage by the vehicle shock absorber that calculates by step 4)
S0Standard value F with same model
SbRatio and the modified value F of the absorber damping force of the vehicle shock absorber compression stage that calculates by step 5)
P0Standard value F with same model
PbRatio whether be greater than or less than the 80% damping vibration attenuation performance that can draw the vehicle shock absorber of surveying and whether be in normal condition.
Compared with prior art, advantage of the present invention is as follows:
The present invention can not detect the vehicle shock absorber damping force fast with disintegrating, whole test process is no more than 5 minutes, thereby solve vehicle shock absorber and disassemble the test shortcoming that just can waste time and energy from automobile, and test result can provide foundation for the damping vibration attenuation degree of monitoring vehicle in use vibration damper, and Auto repair shop is had Practical significance.
Description of drawings:
Fig. 1 is the vehicle shock absorber damping force device for quick testing synoptic diagram that do not disintegrate
Among Fig. 1, P-automotive wheel, Q-body of a motor car, R-bearing spring, S-vehicle shock absorber, 1-displacement transducer, 2-displacement transducer mounting bracket, 3-LOAD CELLS, the 4-testing stand of weighing, 5-computing machine;
Fig. 2 is the various squiggles of test
The wavy curve of in time t variation of the relative displacement of test curve 1-body of a motor car Q and the automotive wheel P that surveys, the wavy curve of in time t variation of the relative velocity of test curve 2-body of a motor car Q and the automotive wheel P that surveys, test curve 3-automotive wheel P acts on the wavy curve of the in time t variation of vertical direction active force on the testing stand 4 of weighing, Cs-vehicle shock absorber is in the damper piston maximal rate of extension during the stage, bs-and corresponding to damper piston maximal rate csThe time automotive wheel P act on vertical direction active force on the testing stand 4 of weighing, the damper piston maximal rate when Cp-vehicle shock absorber is in compression stage, bp-corresponding to damper piston maximal rate cpThe time automotive wheel P act on hanging down on the testing stand 4 of weighing Nogata is to active force.
Embodiment:
In order to implement automobile absorber damping force undisintegrated quick-measuring method of the present invention, the inventor provides a kind of vehicle shock absorber damping force as shown in Figure 1 device for quick testing that do not disintegrate, and it is made of jointly displacement transducer 1, displacement transducer mounting bracket 2, LOAD CELLS 3, the testing stand 4 of weighing, computing machine 5.The lower end of its displacement transducer mounting bracket 2 by magnetic suction disc be installed in survey on the automotive wheel P, the upper end that displacement transducer 1 is installed in displacement transducer mounting bracket 2 is used to measure test curve 1, LOAD CELLS 3 is installed on the testing stand 4 of weighing and is used to measure test curve 3, and the output of displacement transducer 1 and LOAD CELLS 3 links to each other with computing machine 5 by signal wire.1～5 all can purchase on market among Fig. 1, assembles then.
Vehicle shock absorber S is enclosed among the bearing spring R after the parallel connection, and its upper end connects body of a motor car Q, and its lower end connects automotive wheel P.
The vehicle shock absorber damping force that the inventor the provided device for quick testing that do not disintegrate can adopt automobile absorber damping force undisintegrated quick-measuring method of the present invention that the damping force of each wheel vehicle shock absorber of various vehicles is not understood body examination examination, and the damping force of being surveyed is meant the damping force of the vehicle shock absorber S among Fig. 1.Be that example further specifies the present invention now, but this example only is used for explanation, can not limit the scope of the invention with Sail car left side rear wheel.
Referring to Fig. 1, Fig. 2, automobile absorber damping force undisintegrated quick-measuring method of the present invention is characterized in that comprising the following steps:
1) Sail car left side rear wheel P is anchored on the testing stand 4;
2) repeatedly firmly push body of a motor car Q with hand, fast hand is unclamped from body of a motor car Q then, make body of a motor car Q produce up-down vibration more than 10 times, vibration frequency is 1Hz～2Hz;
3) with the universal industrial Control Software such as the Labview software collection that are equipped with in A/D capture card that is equipped with in the computing machine 5 and computing machine 5 storeies and preserve step 2) in the test curve 1 of displacement transducer 1 in last 2 seconds and the test curve 3 of LOAD CELLS 3, and the average that calculates test curve 3 is 1186N, test curve 1 carried out calculus of differences try to achieve test curve 2;
4) draw this car vibration damper by the maximal value of test curve 2 and be in the damper piston maximal rate c of extension during the stage
sBe 0.28m/s, on test curve 3, find then corresponding to maximum damper piston speed c
sThe time automotive wheel P act on vertical direction acting force b on the testing stand 4 of weighing
sBe 345N, the average of test curve 3 is deducted b
sCan try to achieve this car vibration damper and be in extension stage damper piston maximal rate c
sAbsorber damping force F during for 0.28m/s
sBe 841N,,, utilize formula [1] to obtain the modified value F of absorber damping force by computing machine 5 in order to reduce test error according to practical experience
s
F
s0＝0.3F
s/c
s＝0.3×841/0.28＝901N [1]
Damper piston maximal rate c when 5) drawing this car vibration damper and be in compression stage by the minimum value of test curve 2
pBe 0.26m/s, on test curve 3, find corresponding to damper piston maximal rate c then
pThe time automotive wheel P act on vertical direction acting force b on the testing stand 4 of weighing
pBe 1721N, the average of test curve 3 is deducted b
pCan try to achieve this car vibration damper and be in compression stage damper piston maximal rate c
pAbsorber damping force F during for 0.26m/s
pBe 535N,,, utilize formula [2] to obtain the modified value F of absorber damping force by computing machine 5 in order to reduce test error according to practical experience
P0
F
p0＝0.3F
p/c
p＝0.3×535/0.26＝617N [2]
6) general vehicle shock absorber is upheld the modified value F of the absorber damping force in stage
S0Modified value F with the vehicle shock absorber damping force of compression stage
P0Measured value respectively with the ratio of identical standard value less than 80% o'clock, can think that the damping vibration attenuation performance of vehicle shock absorber does not reach request for utilization, its ratio can think that greater than 80% o'clock the damping vibration attenuation performance of vehicle shock absorber is in normal condition.This car vibration damper is in extension absorber damping force standard value F during the stage
SbBe 910N, the institute's measuring car vibration damper that is calculated by step 4) is upheld the modified value F of the absorber damping force in stage
S0Standard value F for 901N and same model
SbFor the ratio of 910N is 99%; Absorber damping force standard value F when this car vibration damper is in compression stage
PbBe 635N, the modified value F of the absorber damping force of the institute's measuring car vibration damper compression stage that calculates by step 5)
P0Standard value F for 617N and same model
PbFor the ratio of 635N is 97%, can judge that thus the damping vibration attenuation performance of the vehicle shock absorber of surveying is in normal condition.
The present invention can not disintegrated and be detected the vehicle shock absorber damping force apace, and whole test process is no more than 5 minutes, and test result can provide foundation for the damping vibration attenuation degree of monitoring vehicle in use vibration damper, and Auto repair shop is had Practical significance.
Claims (1)
1. an automobile absorber damping force undisintegrated quick-measuring method is characterized in that comprising the following steps:
1) automotive wheel (P) is anchored on the testing stand of weighing (4);
2) repeatedly firmly push body of a motor car (Q) with hand, fast hand is unclamped from body of a motor car (Q) then, make body of a motor car (Q) produce up-down vibration more than 10 times, vibration frequency is 1Hz～2Hz;
3) gather and preserve step 2 with the A/D capture card that is equipped with in the computing machine (5) with the universal industrial Control Software that is equipped with in computing machine (5) storer) in the test curve 1 of displacement transducer (1) in last 2 seconds and the test curve 3 of LOAD CELLS (3), and the average of calculating test curve 3, test curve 1 is carried out calculus of differences try to achieve test curve 2;
4) draw vehicle shock absorber by the maximal value of test curve 2 and be in the damper piston maximal rate c of extension during the stage
sUnit is m/s, finds on test curve 3 corresponding to damper piston maximal rate c then
sThe time automotive wheel (P) act on vertical direction acting force b on the testing stand of weighing (4)
sThe N of unit deducts b with the average of test curve 3
sCan try to achieve vehicle shock absorber and be in extension stage damper piston maximal rate c
sThe time absorber damping force F
s,,, utilize formula [1] to obtain the modified value F of absorber damping force by computing machine (5) in order to reduce test error according to practical experience
S0
F
s0＝0.3F
s/c
s [1]
Damper piston maximal rate c when 5) drawing vehicle shock absorber and be in compression stage by the minimum value of test curve 2
pUnit is m/s, finds on test curve 3 corresponding to damper piston maximal rate c then
pThe time automotive wheel (P) act on vertical direction acting force b on the testing stand of weighing (4)
pUnit is N, and the average of test curve 3 is deducted b
pCan try to achieve vehicle shock absorber and be in compression stage damper piston maximal rate c
pThe time absorber damping force F
p,,, utilize formula [2] to obtain the modified value F of absorber damping force by computing machine (5) in order to reduce test error according to practical experience
P0
F
p0＝0.3F
p/c
p [2]
6) uphold the modified value F of the absorber damping force in stage by the vehicle shock absorber that calculates by step 4)
S0Standard value F with same model
SbRatio and the modified value F of the absorber damping force of the vehicle shock absorber compression stage that calculates by step 5)
P0Standard value F with same model
PbRatio whether be greater than or less than 80%, can judge whether the damping vibration attenuation performance of the vehicle shock absorber of surveying is in normal condition.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005100296410A CN100489481C (en) | 2005-09-14 | 2005-09-14 | Automobile absorber damping force indisintegrated quick-measuring method |
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|---|---|---|---|
| CNB2005100296410A CN100489481C (en) | 2005-09-14 | 2005-09-14 | Automobile absorber damping force indisintegrated quick-measuring method |
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| CN1743829A CN1743829A (en) | 2006-03-08 |
| CN100489481C true CN100489481C (en) | 2009-05-20 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101995330B (en) * | 2009-08-21 | 2012-03-21 | 中国船舶重工集团公司第七一三研究所 | Nondestructive testing device for disc spring damper and using method thereof |
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| CN102139613B (en) * | 2011-02-15 | 2012-09-26 | 北京科技大学 | Oil gas suspension pressure balance device for mine automobile |
| CN102706567B (en) * | 2012-05-14 | 2015-02-18 | 广东工业大学 | Real-time judgment method for plumpness of sedan damper indicating characteristics in assembling line |
| CN103728142B (en) * | 2014-01-14 | 2016-09-07 | 安徽佳通乘用子午线轮胎有限公司 | The evaluation method of bank rear axle power attenuation characteristic crossed by a kind of tire |
| JP6516735B2 (en) | 2014-05-28 | 2019-05-22 | 株式会社ショーワ | Inspection method of damping force variable mechanism and inspection method of pressure shock absorber |
| CN107782538A (en) * | 2016-08-24 | 2018-03-09 | 长城汽车股份有限公司 | The method of testing of absorber damping force |
-
2005
- 2005-09-14 CN CNB2005100296410A patent/CN100489481C/en not_active Expired - Fee Related
Non-Patent Citations (4)
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|---|
| 在用汽车减振器阻尼测试方法. 周建鹏，陈昌锡，曹永上.上海工程技术大学学报，第18卷第1期. 2004 |
| 在用汽车减振器阻尼测试方法. 周建鹏，陈昌锡，曹永上.上海工程技术大学学报，第18卷第1期. 2004 * |
| 汽车悬架减振器不解体测试方法的研究. 周建鹏，曹永上，徐兆坤，陈昌锡，高蔚.汽车工程，第26卷第1期. 2004 |
| 汽车悬架减振器不解体测试方法的研究. 周建鹏，曹永上，徐兆坤，陈昌锡，高蔚.汽车工程，第26卷第1期. 2004 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101995330B (en) * | 2009-08-21 | 2012-03-21 | 中国船舶重工集团公司第七一三研究所 | Nondestructive testing device for disc spring damper and using method thereof |
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|---|---|
| CN1743829A (en) | 2006-03-08 |
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