Analysis on the factors and effects of engine tapping noise by Design of Experiment (DOE) / Mohd Shahrudin Mohd Alias … [et al.]

Mohd Alias, Mohd Shahrudin and Saad, Nor Hayati and Saedon, Juri and Hassan, Nor Hidayahti and Harun, Saidi (2015) Analysis on the factors and effects of engine tapping noise by Design of Experiment (DOE) / Mohd Shahrudin Mohd Alias … [et al.]. Journal of Mechanical Engineering (JMechE), 12 (2). pp. 28-47. ISSN 1823-5514 ; 2550-164X


The effect of various factors on engine noises have been studied in several ways involving component simulation and product investigations. However, the solution remain exclusive and investigation may be expensive but yet to solve the engine noise issues entirely for several engine Original Equipment Manufacturers (OEMs). Manufacturing has many factors that much to be considered and this includes the uncontrolled or 'noise 'factors that exist within the process and product operation. The main research objective is to determine the optimum combination of control factors for engine valvetrain tapping sound while robust to noise factors by using Taguchi method. The objective is also to identify the most significant factors by using Analysis of Variance (ANOVA) approach. In this study, the effects of seven controlled factors and two uncontrolled factors were investigated by implementing the Orthogonal Arrays (OA) of Taguchi experimental method on a DOHC gasoline engine. The Orthogonal Array design of L₈2⁷ was chosen and eight experiment runs with pre-test run were conducted at the manufacturing plant in actual engine running condition. The optimum parameters from the DOE yield the best sound pressure level of 70.34 dB SPL based on software prediction, while the most significant factor found to be considered for improvement was the camshaft exhaust waviness of minimum level (waviness curve-maximum, WCM 2.0jum and below). Based on the confirmation run result, the optimum parameters yield the actual sound pressure level of 70.4 dB SPL which equal to predicted value. This result further convince that the implemented methodology is effective to find the best combinations of the studied factor parameters and able to reduce the engine valvetrain noise level.


Item Type: Article
Email / ID Num.
Mohd Alias, Mohd Shahrudin
Saad, Nor Hayati
Saedon, Juri
Hassan, Nor Hidayahti
Harun, Saidi
Subjects: T Technology > TJ Mechanical engineering and machinery > Miscellaneous motors and engines.Including gas, gasoline, diesel engines
Divisions: Universiti Teknologi MARA, Shah Alam > Faculty of Mechanical Engineering
Journal or Publication Title: Journal of Mechanical Engineering (JMechE)
UiTM Journal Collections: UiTM Journal > Journal of Mechanical Engineering (JMechE)
ISSN: 1823-5514 ; 2550-164X
Volume: 12
Number: 2
Page Range: pp. 28-47
Keywords: Valvetrain noise, DOHC (Double Overhead Camshaft) gasoline engine, Taguchi methodologies, Orthogonal Array, Controlled and Uncontrolled factors.
Date: 2015
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