Combustion loss detecting method for controlling internal combustion engine, involves calculating energy release volume, and comparing energy release volume with predefined threshold during internal combustion engine cycle

摘要

#CMT# #/CMT# The method involves measuring pressure in a combustion chamber (2), and calculating an energy release volume. The energy release volume is compared with a predefined threshold during an internal combustion engine cycle. A combustion loss of an internal combustion engine (1) is detected when the energy release volume remains lower than the predefined threshold during the entire engine cycle, where the threshold is determined based on an operating point of the engine. #CMT#USE : #/CMT# Used for detecting a combustion loss for controlling an internal combustion engine with a variable compression rate (claimed). #CMT#ADVANTAGE : #/CMT# The method enables detection of the combustion loss for effectively and robustly controlling the internal combustion engine with a low compression rate. The utilization of the energy release volume amplifies a combustion peak in a useful area and reduces a noise measurement in other zones, thus facilitating thresholding. #CMT#DESCRIPTION OF DRAWINGS : #/CMT# The drawing shows a schematic view of an internal combustion engine that is suited for a method of detecting a combustion loss. 1 : Internal combustion engine 2 : Combustion chamber 3 : Intake manifold 4 : Exhaust manifold 5 : Pressure sensor.