Filter regeneration process
AssigneeGM Global Technology Operations LLC
InventorsRahul Mital, Bryan D. Axe, Sarah Funk, Jianwen Li
Life of this patent
Estimating the term…
Abstract
A vehicle includes an internal combustion engine. An exhaust system is connected to an exhaust output of the internal combustion engine. The exhaust system includes a passive storage component upstream of an electric heating unit and a selective catalytic reducer and a particulate filter downstream of the electric heating unit. A controller is controllably coupled to the exhaust system and configured to initiate a soot burn of the particulate filter while maintaining the passive storage component within a predetermined temperature range.
Claims20
A vehicle comprising:
- an internal combustion engine, wherein operation of the internal combustion engine generates exhaust gasses;
- an exhaust system connected to an exhaust output of the internal combustion engine, wherein the exhaust system is configured to receive the exhaust gasses, the exhaust system including a passive storage component, wherein the passive storage component is upstream of an electric heating unit, and the exhaust system further including a selective catalytic reducer and a particulate filter, wherein the selective catalytic reducer and the particulate filter are downstream of the electric heating unit;
- and
- a controller controllably coupled to the exhaust system, wherein the controller is configured to initiate a soot burn of the particulate filter while maintaining a temperature of the passive storage component within a predetermined temperature range, and wherein the controller is configured to maintain the soot burn for a predetermined time period, the predetermined time period being a length of time where the length is determined prior to initiating the soot burn.
A method for refreshing a particulate filter of an exhaust system of a vehicle, the method comprising:
- initiating a soot burn of a particulate filter while maintaining a passive storage component within a predetermined temperature range using a controller;
- maintaining the soot burn of the particulate filter until after a predetermined time period has elapsed, the predetermined time period being a length of time where the length is determined prior to initiating the soot burn;
- and
- wherein the vehicle includes an internal combustion engine, an exhaust system connected to an exhaust output of the internal combustion engine, the exhaust system including the passive storage component upstream of an electric heating unit and a selective catalytic reducer and the particulate filter downstream of the electric heating unit and the controller being controllably coupled to the exhaust system.
Dependencies are inferred from the claim text.