Overview of noise and vibration in automotive engines

Zouani, Abdelkrim; Hanim, Salah

doi:10.1504/ijvnv.2016.079054

Cited by 17 publications

(8 citation statements)

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“…Noise generated by an electric motor and an ICE are perceived differently by our auditory system. Engines have multiple vibration sources, which lead to a wide range of noise frequencies [11]. Fuel combustion in the cylinder, which is the source of power generation, is the primary noise source.…”

Section: Noise Characteristics Of Ices and Electric Motorsmentioning

confidence: 99%

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Noise and Vibration in Switched Reluctance Motors: A Review on Structural Materials, Vibration Dampers, Acoustic Impedance, and Noise Masking Methods

2023

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Today, the majority of the commercial electrified vehicles use Interior Permanent Magnet Motors (IPMSMs) for propulsion. An IPMSM can deliver high starting torque and high efficiency in the low-and medium-speed operation, which makes it attractive for propulsion applications. However, IPMSMs generally utilize rare-earth permanent magnets and there are growing concerns about the price volatility and supply chain of these materials. Switched Reluctance Motors (SRMs) can potentially replace IPMSMs in various applications including propulsion. An SRM has a simple and low-cost construction, and it can provide reliable operation at high-speed and high-temperature conditions. Compared to IPMSMs, SRMs radiate considerably higher acoustic noise, which have historically hindered their widespread acceptance. Various approaches to mitigate acoustic noise and vibration at the source level have already been explored in the literarture by improving the electromagnetic design and current control. This paper explores multiple noise and vibration mitigation methods that can be applied at the transmission stage. First, the noise comparison between the Internal Combustion Engine (ICE) and SRMs is discussed, and then the methods used for ICEs are presented for their applicability to SRMs.

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Section: Noise Characteristics Of Ices and Electric Motorsmentioning

confidence: 99%

“…The reason lies in how we perceive the noise generated by an electric motor and an ICE. An ICE have multiple noise sources, leading to broadband noise comprising tonal, impulsive, and flow noises [11], [12]. Even though ICE noise has a tonal component, it is masked by impulsive and flow noises.…”

Section: Introductionmentioning

confidence: 99%

Noise and Vibration in Switched Reluctance Motors: A Review on Structural Materials, Vibration Dampers, Acoustic Impedance, and Noise Masking Methods

2023

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“…Excessive vibration leads to fatigue damage of engine parts, and affects the stability and mechanical efficiency of the engine's operation. The resulting noise may also cause irreversible hearing loss in operators [1,2]. Numerous scholars have carried out in-depth research on vibration sources.…”

Section: Introductionmentioning

confidence: 99%

A Novel Coaxial Balance Mechanism for Reciprocating Piston Engines

Guan

Wang

et al. 2021

Applied Sciences

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Vibration is an important issue faced by reciprocating piston engines, and is caused by reciprocating inertia forces of the piston set. To reduce the vibration without changing the main structure and size of the original engine, we proposed a novel coaxial balance mechanism design based on a compact unit body. By introducing a second-order balance mass, this mechanism can significantly increase the efficiency of vibration reduction. The proposed mechanism can effectively balance the first-order and second-order inertia forces with the potential of balancing high-order inertia forces. To accurately determine the second-order balance mass, a closed-form method was developed. Simulation results with a single-cylinder piston DK32 engine demonstrate the effectiveness and advantage of the proposed mechanism. At a crankshaft speed of 2350 r/min, compared with the first-order balance device, the average root mean square velocity of the test points on the engine’s cylinder was reduced by 97.31%, and the support reaction force was reduced by 96.54%.

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“…Since the 1980s, automotive noise and vibration has received tremendous attention by researchers and has become an essential factor in vehicle design and validation process. As a result, the main sources of vehicle noise, vibration and harshness (NVH) that were identified consist of the tyre-road noise which dominates in the medium and high-speed ranges, the powertrain noise (Zouani and Hanim, 2016) which is dominant in low to medium speed ranges and the wind noise that is dominant in high speed ranges (Hanouf and Faris, 2009). The interior NVH can be classified into air-borne noise and structure-borne noise based on their transmission to the passenger cabin.…”

Section: Introductionmentioning

confidence: 99%

Genetic and random search algorithms for optimising vehicle interior noise and vibration

Al‐Dhahebi

Junoh

Muhamad

2018

IJVNV

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The goal of this paper is to optimise the vehicle noise and vibration using genetic and random search algorithms (RSAs) approach. Toward this end, an experimental design was carried out to acquire the noise and vibration data using three local compact cars namely Viva, Myvi and Axia on stationary and running conditions with a variety of engine speeds transmissions. The measured noise and vibration were analysed to obtain the sound quality parameters loudness and sharpness, sound pressure level and vibration exposures in the interior vehicle cabin. Overall findings of this study indicate that the comfort level is factually influenced by factors including type of road surface, engine transmissions and vehicle design characteristics. The results also indicate that the proposed approach is reliable and can be utilised by automotive researchers to identify the optimal NVH values necessary for vehicle refinement and noise control.

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Overview of noise and vibration in automotive engines

Cited by 17 publications

References 0 publications

Noise and Vibration in Switched Reluctance Motors: A Review on Structural Materials, Vibration Dampers, Acoustic Impedance, and Noise Masking Methods

Noise and Vibration in Switched Reluctance Motors: A Review on Structural Materials, Vibration Dampers, Acoustic Impedance, and Noise Masking Methods

A Novel Coaxial Balance Mechanism for Reciprocating Piston Engines

Genetic and random search algorithms for optimising vehicle interior noise and vibration

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