Method of calculating the amount of work done by an internal combustion engine

• Main Author: SHINOZAKI KOICHIRO,OKUBO KATSURA,YASUI YUJI,SATO MASAHIRO
• Format: Patent
• Language: English
• Published: 15.02.2006
• Subjects: BLASTING; COMBUSTION ENGINES; CONTROLLING COMBUSTION ENGINES; HEATING; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS; LIGHTING; MEASURING; MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER,MECHANICAL EFFICIENCY, OR FLUID PRESSURE; MECHANICAL ENGINEERING; PHYSICS; TESTING; TESTING STATIC OR DYNAMIC BALANCE OF MACHINES ORSTRUCTURES; TESTING STRUCTURES OR APPARATUS NOT OTHERWISE PROVIDED FOR; WEAPONS

A method of calculating the amount of work done by an internal combustion engine, which is capable of calculating a work amount parameter indicative of the amount of work done with accuracy while compensating for a phase delay in in-cylinder pressure data caused e.g. by a filtering process performed thereon. The method calculates the work amount parameter P mi indicative of the amount of work done by the engine 3 including a combustion chamber 3b, as follows: Pressure in the combustion chamber 3b is detected to obtain in-cylinder pressure data P indicative of the detected pressure. Volume data V indicative of a state of change in volume of the combustion chamber 3b is obtained. The obtained volume data V is subjected to a first predetermined filtering process. The work amount parameter P mi is calculated based on the detected in-cylinder pressure data P, and the volume data filtered value VF obtained by subjecting the volume data V to the first filtering process.