Compressor for Exhaust Treatment System

摘要

An exhaust aftertreatment system for an engine is provided that includes a burner, an air supply system and a control module. The air supply system may be in fluid communication with the burner and may include an air compressor disposed upstream from the burner. The air compressor may include a pump mechanism, a clutch assembly selectively transferring torque from the engine to the pump mechanism, and a motor selectively driving the pump mechanism. The control module may be in communication with the clutch assembly and the motor. The control module may selectively switch the air compressor between a first operating mode in which the clutch assembly transfers torque from the engine to the pump mechanism and a second operating mode in which the motor drives the pump mechanism.

主权项

1. An exhaust aftertreatment system comprising:
an exhaust passage receiving exhaust gas from an engine; an exhaust aftertreatment device disposed in the exhaust passage; a burner in a heat transfer relationship with the exhaust gas flowing through the exhaust passage upstream of the exhaust aftertreatment device; an air supply system in fluid communication with the burner and including an air compressor disposed upstream from the burner, the air compressor including a pump mechanism, a clutch assembly selectively transferring torque from the engine to the pump mechanism, and a motor selectively driving the pump mechanism; and a control module in communication with the clutch assembly and the motor, the control module selectively switching the air compressor between a first operating mode in which the clutch assembly transfers torque from the engine to the pump mechanism and a second operating mode in which the motor drives the pump mechanism based on a demand for airflow into the burner.