Comparative assessment of vertical vibrations of a vehicle on the road and during the EUSAMA test

Zdanowicz, P.

doi:10.1088/1757-899x/421/2/022045

Cited by 3 publications

(7 citation statements)

References 3 publications

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“…in the road conditions has also been addressed (see also [7]). It has been shown as well that the shock absorbers wear may affect the process of braking a car with the ABS when moving on uneven ground, which has been highlighted by e.g.…”

Section: Issn 1335-4205 (Print Version) Issn 2585-7878 (Online Version)mentioning

confidence: 99%

“…In the simulations, a non-linear, experimentally verified "quarter-car" model was used (see Figure 5), where the sliding friction in the suspension system and smoothing properties of the tires and also tire separation from the ground ("lift-off") were taken into account (mathematical model -see also [2,7]). Most of the model parameters had been previously identified in rig tests (main parameters -see Table 3).…”

Section: Comparison By Simulation Of Selected Operating Parameters Of the Motor Car Suspension System In A Typical Diagnostic Test And Inmentioning

confidence: 99%

“…As one of the peculiarities of such a method, the stroke of the tester vibration plate is to be constant, equal to e.g. 6 mm, as it is in the case of the EUSAMA machines [1][2][3][4][5][6][7]. Unfortunately, such testers, which are the most popular, suffer from a major drawback: the final test result strongly depends on the tire inflation pressure, sprung mass, sliding friction in the suspension system, test conditions, and tester characteristics [1-2, 4, 6-8].…”

Section: Introductionmentioning

confidence: 99%

“…[1,8]). The distorting effect of the sliding friction on the test result was presented in [2,7], as well.…”

Section: Introductionmentioning

confidence: 99%

“…If, however, the half-cycle average values are used then the value of the viscous damping force amplitude may turn out to be markedly lower than the value of the sliding friction force. Hence, a statement may be made that the final result of the diagnostic EUSAMA shock absorber testing depends to a considerable degree on the frictional resistance in the suspension system (see also [7]).…”

Section: Introductionmentioning

confidence: 99%

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Diagnostics of the On-Vehicle Shock Absorber Testing

Zdanowicz¹,

Guzek²

2021

Komunikácie

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The practical problems that usually come up during the on-vehicle testing of motor car shock absorbers have been discussed. Results of example tests carried out to the EUSAMA standard procedure were compared to the test results obtained with using newer methods, i.e. the phase angle method and half power bandwidth method (HPBM). The issue of incompatibility of the typical excitation applied by diagnostic suspension testers with one that often occurs in the road conditions has also been raised. It has also been shown that the wear of shock absorbers may affect the value of braking deceleration of cars with ABS (anti-lock braking system) when moving on uneven ground. The main objective of the work was to assess usefulness and reliability of various diagnostic methods intended for the on-vehicle testing of car shock absorbers.

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Section: Issn 1335-4205 (Print Version) Issn 2585-7878 (Online Version)mentioning

confidence: 99%

Section: Comparison By Simulation Of Selected Operating Parameters Of the Motor Car Suspension System In A Typical Diagnostic Test And Inmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

“…[1,8]). The distorting effect of the sliding friction on the test result was presented in [2,7], as well.…”

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Diagnostics of the On-Vehicle Shock Absorber Testing

Zdanowicz¹,

Guzek²

2021

Komunikácie

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Effects of Using Various Methods for Car Shock Absorbers Diagnostic Tests

Guzek

Zdanowicz

2020

The Archives of Automotive Engineering – Archiwum Motoryzacji

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The work concerns the diagnostic assessment of the technical condition of the car suspension. The paper discusses practical problems that usually appear during testing of car shock absorbers mounted in a vehicle. The results of experimental tests for passenger car, carried out according to the EUSAMA standard test, were compared with the results obtained using newer methods (phase angle method and half power bandwidth method – HPBM). The article also deals with the issue of incompatibility of typical excitation at diagnostic devices for testing suspension with the one that often occurs in road conditions (by simulation method). The main purpose of the work was to assess the usefulness and reliability of various diagnostic methods intended for the testing of vehicle shock absorbers without disassembly them from the vehicle. The analyses carried out indicated the advantages and disadvantages of these methods in practice. It is also shown that the conditions of diagnostic tests correspond poorly to the operating conditions of the shock absorbers under normal vehicle operating conditions. An important factor in this case is the sliding friction in the suspension.

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The Evaluation of Vehicle Vibrations Excited with a Test Plate during Technical Inspection of Vehicle Suspension

Szczypiński-Sala¹,

Kot²,

Hankus³

2022

Applied Sciences

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The main aim of this article is to present the possibility of assessing the intensity of the impact of vibrations on vehicle users. During vehicle operation, many factors can have impacts on changes in the characteristics of car suspension, which can affect passenger comfort. This paper presents the results obtained from calculations based on a mathematical model, as well as from measurements during laboratory tests. The tests were performed on vehicles that differed in characteristics of damping suspension. The tests were carried out using a test stand for evaluating the effectiveness of shock absorbers in vehicles. During the tests, vibration propagations on the driver’s seat and the steering wheel were evaluated. An analysis of the amplitudes and frequencies of vibrations experienced by occupants was carried out. A method for assessing the impact of changes in the damping characteristics of a suspension system on vehicle users’ comfort during technical inspection was proposed.

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Comparative assessment of vertical vibrations of a vehicle on the road and during the EUSAMA test

Cited by 3 publications

References 3 publications

Diagnostics of the On-Vehicle Shock Absorber Testing

Diagnostics of the On-Vehicle Shock Absorber Testing

Effects of Using Various Methods for Car Shock Absorbers Diagnostic Tests

The Evaluation of Vehicle Vibrations Excited with a Test Plate during Technical Inspection of Vehicle Suspension

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