Patent ID: 7606651
Filing Date: 2009-10-20
Classification: F02D

Abstract:
1. A control apparatus for a multi-cylinder internal combustion engine, comprising at least two cylinder pressure sensors respectively coupled to corresponding cylinders of said multi-cylinder internal combustion engine, with each said cylinder pressure sensor adapted to detect values of combustion chamber pressure of said corresponding cylinder, and processing circuitry adapted to acquire digital data as combustion chamber pressure data for each of said cylinders, from detection results of said corresponding cylinder pressure sensor, within each angular region of a specific series of angular regions that correspond to said cylinder and that are part of a continuous non-overlapping sequence of angular regions, each of said angular regions corresponding to a rotation of an output shaft of said multi-cylinder internal combustion engine through a specific angular displacement; wherein said control apparatus comprises timing adjustment circuitry adapted to set a timing of each of said angular regions in accordance with a current operating condition of said multi-cylinder internal combustion engine, said timing being determined for each of said angular regions with respect to a reference position of a piston of said corresponding cylinder.