Patent ID: 7775089
Filing Date: 2010-08-17
Classification: G01M

Abstract:
1. An abnormality detection apparatus for detecting an abnormality of an internal combustion engine in a motive power output apparatus for outputting motive power to a drive shaft by utilizing said internal combustion engine and a motor generator as power sources, said motive power output apparatus including: a power split device configured to mechanically connect an input shaft receiving the motive power from said internal combustion engine, a rotation shaft of said motor generator and said drive shaft, and also to mechanically split the motive power from said internal combustion engine to said motor generator and said drive shaft; and a damper connected between an output shaft of said internal combustion engine and said input shaft for transferring the motive power while suppressing relative rotation of the output shaft of said internal combustion engine and said input shaft, said abnormality detection apparatus comprising: a torque estimating unit estimating output torque of said internal combustion engine based on rotation angular acceleration of the output shaft of said internal combustion engine; a torque correcting unit calculating elastic force to be imposed on the output shaft of said internal combustion engine so that said damper suppresses the relative rotation of the output shaft of said internal combustion engine and said input shaft, and to correct said estimated output torque of said internal combustion engine based on the calculated elastic force of said damper; and an abnormality diagnosing unit diagnosing the abnormality of said internal combustion engine based on the corrected output torque of said internal combustion engine.