Instantaneous data acquisition and processing system for internal-combustion engine control

A data acquisition and processing system for controlling running cycles of a two-stroke or four-stroke internal-combustion engine comprising:

• a crankshaft and at least one combustion chamber having at least one cylinder and a piston, an angular encoding means for producing pulses indicative of angular increments of the crankshaft and cycle synchronization pulses at each revolution thereof, means for delivering angular increments at regular angular intervals, a sensor for sensing at least pressure values in each combustion chamber, a measuring signal acquisition set including means for acquisition of the pressure values, a digital processor including storage means for storing parameters of the engine, means for locating automatically a true angular position of the crankshaft within each cycle by reference to pressure variations in the at least one combustion chamber, means for phasing the synchronization pulses with the angular increments, means for calculating in real time a mean indicated pressure PMI in the at least one combustion chamber at each one of successive cycles of the engine and a control for controlling at least from the calculated mean indicated pressure PMI optimum running parameters for the engine, and angular locating means for applying to the digital processor data relative to a position of the cycle synchronization pulses with respect to top dead center of the piston.