Sound Quality and Engine Performance Development Utilizing Air-to-Air Simulation and Interior Noise Synthesis

2003 ◽  
Author(s):  
Michael G. Hueser ◽  
Kiran Govindswamy ◽  
Klaus Wolff ◽  
Ralf Stienen
Keyword(s):  
Engine Performance ◽  
Sound Quality ◽  
Interior Noise ◽  
Performance Development

scholarly journals Interior Sound Quality Prediction of Pure Electric Vehicles Based on Transfer Path Synthesis

2021 ◽  
Vol 11 (10) ◽  
pp. 4385
Author(s):  
Kun Qian ◽  
Zhichao Hou ◽  
Jie Liang ◽  
Ruixue Liu ◽  
Dengke Sun
Keyword(s):  
Electric Vehicles ◽  
Sound Quality ◽  
Interior Noise ◽  
Experimental Comparison ◽  
Noise Component ◽  
Acoustic Environment ◽  
Evaluation Indexes ◽  
Transfer Path ◽  
New Ideas ◽  
Path Synthesis

The interior sound quality (SQ) of pure electric vehicles (PEVs) has become an important consideration for users purchasing vehicles. At present, it is insufficient to take the sound pressure level as the interior acoustics design index of PEVs. Transfer path analysis (TPA) and transfer path synthesis (TPS) that take the SQ of interior noise as the improvement target remains in the preliminary exploration stage. In this paper, objective psychoacoustic parameters of SQ were taken as evaluation indexes of interior PEV noise. A virtual interior SQ synthesis model was designed on the basis of TPA and TPS, which combines experimentation and simulation. The SQ synthesis model demonstrates each noise component contribution in a PEV by new SQ separation technology. First, the interior noise transfer path and noise source of the PEV were determined in a synthesis analysis method of the interior PEV noise. Second, on the basis of the composition mechanism of interior noise and the basic principle of TPA, the excitation signal and transfer function of each interior noise path in the PEV were tested. On the basis of TPS, the interior SQ synthesis model of PEV was then established. Finally, the accuracy of the prediction model was verified in simulation and experimental comparison studies on the psychoacoustic objective parameters of SQ. The SQ objective parameter value of each transfer path was quantified by using contribution analysis. The results are expected to improve the comfort of the interior acoustic environment and enhance the competitiveness of vehicle products. They also provide an effective reference and new ideas for the development of interior SQ in PEVs.

Some Effects of Size on the Performances of Small Gas Turbines

2003 ◽  
Author(s):  
C. Rodgers
Keyword(s):  
Gas Turbine ◽  
Gas Turbines ◽  
Engine Performance ◽  
Lessons Learned ◽  
Rapid Expansion ◽  
Cycle Performance ◽  
Frictional Drag ◽  
Component Design ◽  
Turbine Component ◽  
Performance Development

By the new millennia gas turbine technology standards the size of the first gas turbines of Von Ohain and Whittle would be considered small. Since those first pioneer achievements the sizes of gas turbines have diverged to unbelievable extremes. Large aircraft turbofans delivering the equivalent of 150 megawatts, and research micro engines designed for 20 watts. Microturbine generator sets rated from 2 to 200kW are penetrating the market to satisfy a rapid expansion use of electronic equipment. Tiny turbojets the size of a coca cola can are being flown in model aircraft applications. Shirt button sized gas turbines are now being researched intended to develop output powers below 0.5kW at rotational speeds in excess of 200 Krpm, where it is discussed that parasitic frictional drag and component heat transfer effects can significantly impact cycle performance. The demarcation zone between small and large gas turbines arbitrarily chosen in this treatise is rotational speeds of the order 100 Krpm, and above. This resurgence of impetus in the small gas turbine, beyond that witnessed some forty years ago for potential automobile applications, fostered this timely review of the small gas turbine, and a re-address of the question, what are the effects of size and clearances gaps on the performances of small gas turbines?. The possible resolution of this question lies in autopsy of the many small gas turbine component design constraints, aided by lessons learned in small engine performance development, which are the major topics of this paper.

Optimum order spectrum profiles for improvement of sound quality of car interior noise

2013 ◽  
Vol 61 (6) ◽  
pp. 578-589 ◽  
Author(s):  
Sung-Hwan Shin ◽  
Takeo Hashimoto
Keyword(s):  
Sound Quality ◽  
Interior Noise ◽  
Order Spectrum ◽  
Optimum Order

Landfill Gas Application Development of the Caterpillar G3600 Spark-Ignited Gas Engine

1995 ◽  
Vol 117 (4) ◽  
pp. 820-825 ◽  
Author(s):  
G. P. Mueller
Keyword(s):  
Natural Gas ◽  
Field Test ◽  
Landfill Gas ◽  
Engine Performance ◽  
Development Work ◽  
Fuel System ◽  
Application Development ◽  
Gas Engine ◽  
Performance Development ◽  
Simulated Landfill

A G3600 engine was developed to operate on landfill gas to demonstrate engine performance and identify any operational problems caused by this application. Fuel system and engine performance development were completed using simulated landfill gas containing carbon dioxide and natural gas at the Caterpillar Technical Center. The engine was packaged as a generator set and has operated for 12,000 hours on landfill gas. Engine performance goals similar to those for G3600 natural gas applications were achieved during development and were attained during the field test. Development work and field test endurance results are presented in this paper.

Sound Quality Evaluation of the Interior Noise of Pure Electric Vehicle Based on Neural Network Model

2017 ◽  
Vol 64 (12) ◽  
pp. 9442-9450 ◽  
Author(s):  
Conggan Ma ◽  
Chaoyi Chen ◽  
Qinghe Liu ◽  
Haibo Gao ◽  
Qing Li ◽  
...  
Keyword(s):  
Neural Network ◽  
Electric Vehicle ◽  
Network Model ◽  
Neural Network Model ◽  
Quality Evaluation ◽  
Sound Quality ◽  
Interior Noise

Assessment of Lightweight Automotive Glass Solutions on Interior Noise Levels & amp; Sound Quality

2017 ◽  
Author(s):  
Todd Tousignant ◽  
Kiran Govindswamy ◽  
Vikram Bhatia ◽  
Shivani Polasani ◽  
W Keith Fisher
Keyword(s):  
Sound Quality ◽  
Interior Noise ◽  
Noise Levels
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