Title: Fault diagnosis of ICE valve train for abnormal clearance and valve head crack using vibration signals

Authors: Eid S. Mohamed

Addresses: Faculty of Engineering, Automotive and Tractors Engineering, Helwan University, P.O. Box 11718, Mataria, Cairo, Egypt

Abstract: Vibration signature analysis (VSA) is one of many technologies for condition monitoring (CM) and diagnosis of reciprocating and rotating machines such as internal combustion engines (ICEs) valve train. CM practices have generally led to improved machine availability and decreased maintenance costs. The cylinder head with overhead valve (OHV) of diesel ICE was used as the experimental set-up. The objective of this paper is focused specifically on the effects on VSA of two types of valve train artificial fault conditions (abnormal clearance of intake valve and crack of the exhaust valve head). The experimental results and analysis showed that surface vibration signature is an effective method to detect damage and the type of damage in valves in both the time and frequency domains. The results indicated the proposed statistical technique is effective in fault diagnosis for experimental cases, and this is considered to be a unique approach to condition monitoring of valve performance.

Keywords: condition monitoring; vibration signals; fault diagnosis; intake valves; valve clearance; valve conditions; abnormal conditions; ICE valve train; abnormal clearance; valve head cracking; vibration signature analysis; VSA; internal combustion engines; cylinder head; overhead valves; diesel engines.

DOI: 10.1504/IJVNV.2015.067974

International Journal of Vehicle Noise and Vibration, 2015 Vol.11 No.1, pp.18 - 38

Available online: 10 Mar 2015 *

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