Comparison of Experimental NVH Analysis Techniques on Automotive HVAC Systems

Schillemeit, Balthasar; Cucuz, Stojan

doi:10.4271/2002-01-1173

Cited by 4 publications

(1 citation statement)

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“…From this result, it can be inferred that the components have a considerable amplitude of vibration when operating close to the natural frequencies, particularly in the range of 250~350 Hz. Studies by Scheillemeit et al [18] and Rodarte et al [19] reported similar results implying that they were typical for these systems. Vibration Spectrum Result Figure 9 shows the correlation between the vibration and clicking noise-induced among five major components in the HVAC model system.…”

Section: Experimental Setup Of Model and Vehicle Hvac Systemsmentioning

confidence: 55%

Validation of Clicking-type Noise and Vibration in Automotive HVAC System

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Mazlan

Hamdan

et al. 2021

IJAME

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In this study, the characteristics of clicking-type noise and vibration occurring in the automotive heating, ventilation and air conditional (HVAC) systems are investigated. A lab-scale model of HVAC system is developed, and validation is carried out with a vehicle system. A fixed blower speed of 1 (at an airflow of 2.53 m/s) with alternated air conditional (AC) was implied in this study. Three different sensors namely as tachometer, accelerometer, and microphone were used to measure and prove the existing noise in the HVAC system. The study inferred that the compressor contributed significantly to the total vibration and noise in the HVAC system. Other components such as AC pipe, evaporator, and thermal expansion valve (TXV) also contributed to a slight extent. The clicking noise was observed in the operating frequency range of 200 ~ 300 Hz. This noise and vibration issues are partly influenced by the running conditions of the AC and the effect was significant when the AC was turned on. The validation of the findings in the model shows a good agreement with the results obtained in the vehicle system, whereby the clicking noise and vibration can be observed at a similar frequency range.

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Section: Experimental Setup Of Model and Vehicle Hvac Systemsmentioning

confidence: 55%