Jaemin Jin

Hyundai Motor Group (South Korea)

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Insoo Jung

Hyundai Motors (South Korea)

Dong-Chul Lee

Hyundai Motors (South Korea)

Sang‐Kwon Lee

Inha University

Min Chul Lee

Korea Institute of Nuclear Safety

Jung Kyu Park

Daejin University

Kwang-Min Won

Hyundai Motors (South Korea)

Jeong-Kuk Yeom

Dong-A University

Seungwook Yang

Hyundai Motors (South Korea)

Dongheun Ha

Inha University

Taejin Shin

Hyundai Motors (South Korea)

Cooperative Institutions

Hyundai Motors (South Korea)

Inha University

Seoul National University

Korea Advanced Institute of Science and Technology

Kia Motors (South Korea)

Pohang University of Science and Technology

Dong-A University

Turbo Power Systems (United Kingdom)

Korea Atomic Energy Research Institute

Kyungpook National University

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디젤 연소음 개발 전략 및 적용

Insoo Jung Jaemin Jin Dongchul Lee Seunghyun Lee

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Method of NVH Quality Rating of Diesel Combustion Noise Using Typical Driving Modes

SAE technical papers on CD-ROM/SAE technical paper series (2009)

Till Papenfus Klaus Genuit Peter Blaschke Koo Tae Kang Insoo Jung

10.4271/2009-01-2078

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Citations (3)

Identification of Rumbling Noise in a Passenger Car Using Blocked Force Transfer Path Analysis

Transactions of the Korean Society for Noise and Vibration Engineering (2020)

Jiseon Back Kanghyun An Taejin Shin Sang‐Kwon Lee Doo‐Hee Han

Rumbling noise generated in a car interior is a phenomenon that occurs when vibration and noise generated by the engine are transmitted to the vehicle interior. Resonance may occur in the main parts of the transmission path during the transmission of the vibration and noise, causing the rumbling noise to increase. A transmission path analysis technique has been used to identify the transmission path that causes the rumbling noise. This method measures the contact force of the mount that connects the vehicle body and the engine, based on which it analyses the transmission path. However, to measure the contact force, the engine must be separated from the vehicle body. To compensate for this shortcoming, this study proposes a method called blocked force transfer path analysis, which does not require the separation of the engine and vehicle body. The proposed method is applied to the identification of the transmission path responsible for the rumbling noise generated in a small passenger car.

10.5050/ksnve.2020.30.3.294

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Citations (1)

Using Analytical Techniques to Understand the Impacts Intelligent Thermal Management Has on Piston NVH

SAE technical papers on CD-ROM/SAE technical paper series (2022)

Alastair Jay Insoo Jung Jaemin Jin Simon Tate

Piston (optics)

10.4271/2022-01-0930

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The Oxidation of Methane at HCCI Engine Combustions

한국동력기계공학회 학술대회 논문집 (2007)

Chen Liao Jaemin Jin Dongheun Ha Jeong-Kuk Yeom

압축천연가스(CNG)의 주요성분인 메탄의 산화와 연소를 HCCI엔진조건하에서 컴퓨터 시뮬레이션으로 연구하였다. 먼저, 당량비를 0.2에서 0.45까지 변화시켜 얻은 압력과 온도효과를 CHEMKIN을 사용하여 계산하였다. 그리고, 메탄의 운동학적 특성을 당량비 Ф=0.3, GRI 3.0 방법을 사용하여 계산하였다. 반응물과 생성물의 반응과정과 매개물의 프로파일은 운동학적 모델을 사용하였다. 마지막으로, 메탄의 산화반응의 주요 반응경로를 확인하기 위해 완전반응유동해석을 사용하였다.

CHEMKIN

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Diagnosis of the Combustion Characteristics of Spark Ignition Engine with Compressed Natural Gas(CNG) Injection Type

Journal of Power System Engineering (2012)

Dongheun Ha Jaemin Jin Seong-Ill Hwang Jeong-Kuk Yeom Sung-Sik Chung

희박예혼합기의 급속연소에 관한 연구를 위하여 2-실린더 가솔린 엔진을 부실 타입의 압축천연가스(CNG) 분사 엔진으로 개조하였다. 본 연구에서는 부실의 최적설계에 관심을 두고 두 종류의 부실을 적용하여 실험을 실시하였고, 부실의 체적과 홀 개수는 1.5cc와 6개로 각각 동일하게 하고, 홀 직경을 0.8mm 및 1.1mm로 달리하였다. CNG연료는 포트연료분사(Port fuel injection; PFI)와 부실분사(Sub-chamber injection; SCI)에 의해 엔진에 독립적으로 공급되고, 그 실험결과로 구한 연소압력, 평균유효압력(IMEP), 질량연소분율과 사이클변동계수(COV) 등을 서로 비교하였다. 본 연구의 대표적 실험연구결과로서 PFI 타입의 엔진연소특성은 희박예혼합기의 경우를 제외하고 모든 조건에 있어서 기존의 가솔린 엔진과 비슷하였고, SCI 타입의 엔진연소특성으로 평균유효압력은 부실 내에 불완전 예혼합기형성으로 PFI 타입보다 낮았으며, COV는 SCI 타입이 희박가연한계가 확대됨으로 인하여, 특히 높은 공기과잉률 범위에서 PFI 타입과 비교해 보다 좋은 결과를 나타내었다.

Compressed natural gas

SPARK (programming language)

10.9726/kspse.2012.16.5.005

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Citations (6)

Study for the Radiated Noise from Engine Depending on Assembly Condition

SAE technical papers on CD-ROM/SAE technical paper series (2017)

Taejin Shin Jaemin Jin Sang‐Kwon Lee Insoo Jung

10.4271/2017-01-1843

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Citations (1)

Development of Deep Learning-based Vehicle Diagnosis Technology Using Noise Data

Transactions of the Korean Society for Noise and Vibration Engineering (2023)

Kyoungjin Noh Dong-Chul Lee Jaemin Jin Insoo Jung Joon‐Hyuk Chang

In this paper, we propose deep learning models for fault diagnosis and noise level estimation using vehicle noise data. First, we use two spectrograms as a feature vector by converting the input signal and the signal of the separated percussive component in the input signal. For fault diagnosis, we design a classification model. Two spectrograms are respectively fed into a series of convolutional layers that includes a convolutional block attention module(CBAM) block and max-pooling. Then, the two outputs are combined and passed through fully connected layers that is finally converted to a probability. Next, we design a regression model for noise level index estimation. We first define the noise level index using signal processing techniques and use it as a target for the deep learning model. Unlike the fault diagnosis model, the two spectrograms are combined and fed into a series of convolutional layers. Then, the output is passed through fully connected layers, and the estimated real value is rounded to the nearest integer value from 1 to 5. Experimental results showed excellent performance with an accuracy of 96 % for fault diagnosis and 86 % for noise level index estimation.

Spectrogram

Feature (linguistics)

Pooling

SIGNAL (programming language)

10.5050/ksnve.2023.33.3.306

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Closed-Loop Control Method for Monitoring and Improving the Diesel Combustion Noise

SAE technical papers on CD-ROM/SAE technical paper series (2016)

Insoo Jung Jaemin Jin Dong-Chul Lee Seung‐Hyun Lee Seungwook Yang

10.4271/2016-01-1770

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