Monitoring of some functional parameters for an internal-combustion engine
Sorin Aurel Rațiu, Gabriel Nicolae Popa, Vasile Alexa · 2008
This work presents the achievement of a monitoring, recording, processing and interpretation concept, at laboratory scale, of some functional parameters for a spark-ignition engine, based on an electronic equipment, which measures the values of 17 parameters that describe the operation of an internal-combustion engine. In order to be able to control the optimal operation of an internal-combustion engine, an important parameter that should be measured is the pressure in the combustion chamber, which has high values (50-70 bar), the developed temperature is high and the frequency of appearance is high (depending on the crankshaft's speed). The measured pressure depends on the crankshaft's position. Is used a pressure transducer with strain-gauge socket, and measurement of the crankshaft's position with a speed transducer with variable reluctance. From experimental data, on one hand, can be analyzed the pressure modification in the combustion chamber depending on the crankshaft's position, and on the other hand, the maximum pressure modification in the cylinder depending on the speed.