Abnormality diagnosis apparatus and abnormality diagnosis method for internal combustion engine system
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United States of America Patent
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Jan 30, 2018
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app pub date -
Dec 18, 2014
filing date -
Jan 30, 2014
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Abstract
An object is to provide a starting diagnosis apparatus for an internal combustion engine system, capable of diagnosing an abnormal location of an internal combustion engine system. The starting diagnosis apparatus includes: a pressure sensor 35 which measures a cylinder pressure for each of the cylinders; a starting confirming unit 91 which confirms whether the internal combustion engine system fails to start; a cylinder-pressure increase confirming unit 92 which confirms an increase of the cylinder pressure for each of the plurality of cylinders, on the basis of a pressure measurement result of the pressure sensor 35, if the starting confirming unit 91 confirms a failure; a normal-cylinder confirming unit 93 which confirms whether the cylinder for which the increase of the cylinder pressure is confirmed by the cylinder-pressure increase confirming unit 92 is a normal cylinder; and a diagnosing unit 96 which diagnoses an abnormal location of the internal combustion engine system on the basis of confirmation results of the cylinder-pressure increase confirming unit 92 and the normal-cylinder confirming unit 93.
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