Detection of Combustion Resonance Using an Ion Current Sensor in Diesel Engines

Abstract

This paper discusses the use of an ion current sensor to detect combustion resonance in a heavy duty direct injection diesel engine. A modified glow plug is used to measure the ion current in addition to its main function in warming up the combustion chamber. A comparison is made between the combustion resonance determined from the signals of an ion current sensor, a cylinder pressure transducer, and an engine vibration sensor. Experiments are conducted on a four cylinder, turbocharged 4.5 liter diesel engine to determine the potential of using the ion current sensor to detect combustion resonance under different injection pressures and exhaust gas recirculation rates. It is concluded that the ion current signal can be used to determine the timing, amplitude, frequency, and duration of the resonance. The sensor output has the potential to be used as a feedback signal to the ECU (electronic control unit) to minimize engine vibration and noise.

Engine valve clearance diagnostics based on vibration signals and machine learning methods

“…The authors of [34] proposed a system for the diagnosis of damage to combustion engines using wavelet packet transform (WPT) and artificial neural network (ANN) techniques. Article [5] discusses the application of the ionic current sensor for detecting combustion resonance in a direct injection diesel engine. A modified glow plug is used to measure ionic current in addition to its main function of heating the combustion chamber.…”

Experimental Investigation on the High-frequency Pressure Oscillation Characteristics of a Combustion Process in a DI Diesel Engine

“…There are many experimental studies on the identification of high-frequency pressure oscillation of the engine by signal processing methods [25][26][27][28][29]. Saeed Siavoshani [25] defined a Wiener filter that characterizes the fluctuation of the cylinder pressure and multiplies the Wiener filter by the combustion pressure signal to obtain combustion contribution of the vibration of the engine block.…”

“…Saeed Siavoshani [25] defined a Wiener filter that characterizes the fluctuation of the cylinder pressure and multiplies the Wiener filter by the combustion pressure signal to obtain combustion contribution of the vibration of the engine block. Badawy et al [26] studied the effect of injection pressure and exhaust-gas recirculation (EGR) on combustion resonance by inserting an ion current sensor. Albarbar et al [27] investigated the air-borne acoustic signal in the vicinity of injector head combined with independent component analysis (ICA) to decompose the acoustic signals, and found that the recovered energy level of high frequency band 9-15 kHz was affected by the injector pressure setting.…”

The advancement of the methods of vibro-acoustic control of the ICE gas distribution mechanism

“…Therefore, the task of developing highly sensitive and accurate methods for diagnosing the gas distribution mechanism is very relevant [19,20]. This will allow us to determine the emerging failures at the initial stages [21][22][23][24]. Thus, according to some data, more than 30 % of engine failures fall at the GDM (Figure 1).…”