Enhanced post injection control system for diesel particulate filters
AssigneeGM Global Technology Operations LLC
InventorsChad E. Marlett, Julian C. Tan
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Abstract
A post injection control system for regulating diesel particulate regeneration of a diesel particulate filter (DPF) with a diesel engine includes a mass airflow sensor that generates a mass airflow signal. A temperature sensor senses the temperature of exhaust and generates an exhaust temperature signal. And a control module commands post injection at a post injection value determined from the mass airflow signal and at a post injection rate determined from the exhaust temperature signal.
Claims17
A post injection control system for regulating diesel particulate regeneration of a diesel particulate filter (DPF) with a diesel engine, comprising:
- a mass airflow sensor that generates a mass airflow signal;
- a temperature sensor that senses the temperature of exhaust and generates an exhaust temperature signal;
- and
- a control module that determines a post injection value based on transient engine operating conditions and that commands post injection at the post injection value determined from said mass airflow signal and at a post injection rate determined from said exhaust temperature signal.
A method of regulating post injection in a diesel engine for diesel particulate regeneration, comprising:
- determining transient operation of said diesel engine;
- and
- during said transient operation of said diesel engine:
- determining a mass airflow from a mass airflow sensor;
- determining a temperature of exhaust from a temperature sensor;
- determining a post injection value based on said mass airflow;
- determining a post injection rate based on said temperature;
- and
- commanding post injection according to said post injection value and said post injection rate.
A post injection control system for regulating diesel particulate regeneration of a diesel particulate filter (DPF) with a diesel engine, comprising:
- a mass airflow sensor that generates a mass airflow signal;
- and
- a control module that determines a post injection value based on at least one of transient engine operating conditions and steady state engine operating conditions and that commands post injection at the post injection value determined from said mass airflow signal.
Dependencies are inferred from the claim text.