EXHAUST EMISSION CONTROL SYSTEM OF HYBRID VEHICLE

摘要

To make compatible both the suppression of an amount of fuel which is consumed in order to reduce NOx occluded in an NSR catalyst, and the suppression of the deterioration of an exhaust component caused by the flow-out of unreacted fuel from the NSR catalyst.SOLUTION: In the case that an SOC of a battery is not smaller than a prescribed charge amount when a prescribed NOx reduction execution condition is established, when a NOx reduction execution part performs NOx reduction processing, a control part decelerates an engine rotation speed of an internal combustion engine, or stops an operation of the internal combustion engine, and controls an electric motor in order to compensate for required torque. On the other hand, in the case that the SOC of the battery is smaller than the prescribed charge amount when the prescribed NOx reduction execution condition is established, the NOx reduction execution part performs the NOx reduction processing while the control part maintains an operation state of the internal combustion engine at a normal operation.SELECTED DRAWING: Figure 3