Combustion monitoring in engines using accelerometer signals

Abstract

Recent regulations for emission control from combustion engines have led to focus on various methods to monitor control and the combustion process. The presented work explores the potential relationship between various combustion events monitored using in-cylinder pressure transducer and the resulting block vibration measured using accelerometers. Various features of combustion development process were derived from the vibration data acquired. The methodology was analyzed using a single cylinder diesel engine. The heat release data was able to detect and extracted various indicators of the combustion process like start of combustion and half of injected fuel positions. Higher correlation was observed for the data computed using heat release curve obtained from the in-cylinder pressure measurements and those obtained using the accelerometer signals. The proposed methodology can be used to optimize the fuel injection timing in order to reduce emissions from engines to comply with various regulations. The practical importance of presented work demonstrates use of monitoring of block vibration signals as a mean of non-intrusive methods of diagnosis of engine for its effective condition monitoring.

User’s determination of a proper method for quantifying fuel consumption of a passenger car with compression ignition engine in specific operation conditions

“…Petrol (gasoline) and diesel are the most widely used sources of energy worldwide for internal combustion engines [13]. A vehicle powered by compression ignition engine using diesel was selected for the intended examination.…”

Design of a Daily-User Methodology to Detect Fuel Consumption in Cars with Spark Ignition Engine

“…Before the very fuel consumption investigation, measurements of deviations were needed to be carry out. Each measurement was executed on the same pump stand and by the same pump pistol with the aim to eliminate deviations which may occur due to using multiple fuel pump pistols [13].…”

Tdnn-Based Engine In-Cylinder Pressure Estimation from Shaft Velocity Spectral Representation

“…Therefore, several techniques estimate the in-cylinder pressure signal from non-intrusive measurements such as vibration [ 11 , 12 , 13 , 14 ], crankshaft position [ 15 ], and other easily measured variables [ 16 ]. Despite the vibration signals reach reasonable prediction rates, locating the accelerometers over the engine is an open research field, even being necessary to add more sensors to cope with the spatial variability [ 17 , 18 , 19 ]. The heat transfer and release rates have also been considered to be wrapper features to estimate pressure from a mathematical model [ 20 , 21 ].…”