FAILURE PREDICTION METHOD OF RECIPROCATING INTERNAL COMBUSTION ENGINE AND DEVICE THEREOF

摘要

PURPOSE: To limit the cylinder so as to easily predict fused failure of an intake/exhaust valve by periodically detecting exhaust temperature at every cylinder during operation, comparing them with each other so as to store the order of degree, comparing this with the order of degree of exhaust temperature of respective cylinders at normal operation previously stored, and finding out large variation of both order. ;CONSTITUTION: At first, comparison is carried out with a first cylinder. Exhaust temperature are taken out from N cylinders by respective exhaust gas temperature detecting means 1, the degrees of the exhaust temperature are compared with it by a comparator 2, and the order of degrees (TDk order) at the time is judged and stored in a memory means 3. The order reference (RTDk order) of respective exhaust temperature previously measured at normal engine condition is readout from a memory means 4, the TDk order is compared with the RTDk order by a comparator 5, and when it is larger than a fixed order difference, a failure prediction signal is output by a failure prediction means 6, and the order difference is compared with a second cylinder. When the fixed order difference is small, similarly they are compared with the second cylinder, and the failure prediction operation is completed at exceeding the N cylinders.;COPYRIGHT: (C)1996,JPO