Patent ID: 7599786
Filing Date: 2009-10-06
Classification: B60K,B60W,F02D,Y02T,Y10T

Abstract:
1. A control method of a power output apparatus, said power output apparatus comprising: an internal combustion engine that is operable independently of a rotating state of a driveshaft; a motoring structure that is capable of motoring the internal combustion engine; and an oxygen concentration measurement unit that is located in an exhaust system of the internal combustion engine to measure an oxygen concentration in exhaust emission from the internal combustion engine, said control method comprising the steps of: (a) detecting a current status of the oxygen concentration measurement unit based on a measurement result of the oxygen concentration measurement unit, when a predetermined execution condition is satisfied in a fuel injection-stop engine rotation state where the internal combustion engine is rotated with stop of fuel injection; and (b) controlling the internal combustion engine and the motoring structure to maintain the fuel injection-stop engine rotation state upon satisfaction of a predetermined cancellation condition for canceling the fuel injection-stop engine rotation state during detection of the current status of the oxygen concentration measurement unit in said step (a), and controlling the internal combustion engine and the motoring structure to cancel the fuel injection-stop engine rotation state on completion of the detection of the current status.