Algorithms for diagnostics of the hydraulic pressure modulators of ABS / ESP systems in stand conditions

Gajek, Andrzej; Strzępek, Piotr; Dobaj, Krzysztof

doi:10.1051/matecconf/201818201020

Cited by 4 publications

(1 citation statement)

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“…The scope of obligatory control tests of active and passive safety systems is being developed as well as the requirements in this regard for diagnostic testers used at PTI stations [1,2,12]. This applies to testing brakes (roller stations) and engines (chassis braking) [4,5].…”

Section: Introductionmentioning

confidence: 99%

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2021

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Section: Introductionmentioning

confidence: 99%

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2021

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Verification of Sensors for Yaw Rate and Lateral Acceleration in Car ESP System

Gajek

Pieniążek

Janczur

et al. 2020

The Archives of Automotive Engineering – Archiwum Motoryzacji

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This study analyzed the possibilities to validate the indications of sensors for yaw rate and lateral acceleration within the scope of extended diagnostic routine of the car ESP system at Vehicle Inspection Stations (SKP). The stand tests were performed using the reference sensors and a standard diagnostic tester. The comparison of the yaw rate and lateral acceleration results obtained from the working sensor under examination, recorded with the V box unit, and the results from the reference sensor demonstrated a good conformity both in quality and quantity. But these tests were demonstrated also a pure conformity (both in quality and quantity) with runs obtained from tester. The Root Mean Square (RMS) was used as factor of qualitative estimation. These inconveniences were caused from in sampling frequency incompatibility and lack of recording synchronization for signals from the tester and from reference sensors. The primary importance question is a firmware modification for selected testers. Such a tester should be able to record signals from a reference sensor and have a set sampling frequency for signals from a working sensor. On the basis of already carried out research analyses the suggested frequency should be no fewer than about of 10 Hz. It resulted from a spectral analysis carried out for possessed runs maintaining the Nyquist limit frequency.

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Identification of the ESP sensors condition during the vehicle service life

Gajek¹,

Kot²,

Strzępek³

2021

Eksploatacja i Niezawodność – Maintenance and Reliability

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The paper presents the proposals of extension of the periodic tests of the selected ESP system sensors: angular velocity sensor and lateral acceleration sensor using a universal diagnostics tester and a plate stand (a wheel play detector unit). The idea of this approach is to evaluate the signals from the above sensors in terms of their amplitude and frequency in the case of known forcing at the plate stand. Knowledge of the amplitude and frequency of the plates excitation and the model of tested vehicle allows for predicting the response of vehicle. On this way the verification of sensors indications is possible. This article presents the flat model of a vehicle placed on the plate stand, simulation tests and the results of its validation for three different vehicles. The results of the investigation show that the wheelbase of vehicle has a significant impact on the steady-state vibration amplitude. This conclusion is important in the practical application of this method to test the vehicle yaw rate sensor in the ESP system.

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Algorithms for diagnostics of the hydraulic pressure modulators of ABS / ESP systems in stand conditions

Cited by 4 publications

References 1 publication

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Verification of Sensors for Yaw Rate and Lateral Acceleration in Car ESP System

Identification of the ESP sensors condition during the vehicle service life

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