Patent ID: 8606484
Filing Date: 2013-12-10
Classification: F02D,G01M

Abstract:
1. An in-cylinder pressure measurement apparatus that measures an in-cylinder pressure of an internal combustion engine, comprising: crank angle detection means that detects a crank angle of the internal combustion engine; crank angle recording means that records time history of the detected crank angle; in-cylinder pressure detection means that detects an in-cylinder pressure; in-cylinder pressure recording means that records time history of the detected in-cylinder pressure; peak in-cylinder pressure time crank angle exhaust pressure detection means disposed in an exhaust port of the internal combustion engine to detect an exhaust pressure in the exhaust port; exhaust pressure recording means that records time history of the detected exhaust pressure; peak exhaust pressure detection means that detects a peak value of the exhaust pressure for each pulsation cycle on a basis of the recorded time history of the exhaust pressure; peak in-cylinder pressure time crank angle reference crank angle setting means that sets a reference crank angle so that a deviation between a crank angle crank angle combination detection means that compares a sum of the reference crank angle and a crank angle operation means that calculates, in the detected combination of crank angles, a pressure deviation between a peak in-cylinder pressure correction means that corrects an output characteristic of the in-cylinder pressure detection means using the calculated pressure deviation.