Real-Time Combustion Parameters Estimation for HCCI-Diesel Engine Based on Knock Sensor Measurement

An Analytical Approach to Converting Vibration Signal to Combustion Characteristics of Homogeneous Charge Compression Ignition Engines

“…However, the phenomenological complexity of the combustion and the nonlinearities associated with it render purely data-driven vibroacoustic combustion estimation approaches, commonly proposed for CI engines, ineffective for LTC applications (refer to Table 1). Limited works that proposed such an approach for HCCI, using a full operational envelope test matrix, were bearly able to predict the combustion onset with errors below 4 CA [37,39]. Notably, peak HRR or PRR values that are relevant for establishing operational limits are extremely difficult to capture in HCCI due to their rapid and random nature.…”

“…Experimental verification under variable engine operating conditions proved only ± 0.5 CAD error in the estimation of the start of combustion. Applying a similar premise, Chauvin et al [37] used a knock sensor signal to determine CA50 in a diesel engine operated in HCCI mode. The approach involved a Gaussian function fitted to the knock energy curve to smooth the signal harmonics.…”

Bayesian Inference for Combustion Phasing Estimation in Diesel Engine

“…(2) The Fourier observer which is a method based on a on-line estimation of the harmonic decomposition of the signal (see Chauvin et al (2008a)). …”

Estimation of Combustion Parameters from Engine Vibrations Based on Discrete Wavelet Transform and Gradient Boosting

“…A combustion analysis can be performed to reduce emissions and fuel consumption and improve performance based upon the in-cylinder pressure measurements [1]. Despite the accurate indication, these intrusive pressure sensors (PSs) have the disadvantages of high cost and issues with their durability [2][3][4]. In addition, the cylinder head requires modifications for the installation of these sensors, making the mounting process complex [1].…”