Integrated load bank and exhaust heater system for a diesel genset exhaust aftertreatment system
OwnerHerman Van Niekerk, Eric G. Wiemers +1inventors
InventorsHerman Van Niekerk, Eric G. Wiemers, Mark Yragui
Life of this patent
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Abstract
An integrated load bank and exhaust heater for a diesel genset exhaust aftertreatment system of the type having a diesel particulate filter (DPF) and a selective catalytic reduction (SCR) section. The load bank/heater can function as a load bank when testing the genset, as a heat source to optimize SCR efficiency, as to thermally regenerate the DPF filter.
Claims44
A method for operating a control system to control the application of power from a genset to a load bank/heater in an exhaust aftertreatment (AT) system of the type having a selective catalytic reduction (SCR) section coupled to the genset, including:
- applying power from the genset to the load bank/heater during genset operation to heat exhaust from the genset;
- monitoring temperature of the exhaust in the AT system;
- and
- regulating the amount of power applied from the genset to the load bank/heater during the genset operation to maintain the monitored temperature of the exhaust in the AT system within an SCR operating temperature range.
A method for operating a control system to control the application of power from a genset to a load bank/heater in an exhaust aftertreatment (AT) system of the type having a diesel particulate filter (DPF) section and selective catalytic reduction (SCR) section coupled to the genset, the method including:
- operating the AT system in a run mode;
- applying power to the load bank/heater during the run mode operation to heat exhaust from the genset;
- monitoring temperature of the exhaust during the run mode operation;
- regulating the amount of power applied to the load bank/heater during the run mode operation to maintain the temperature of the exhaust in the AT system within an SCR operating temperature range;
- operating the AT system in a DPF filter regeneration mode;
- applying power to the load bank/heater during the filter regeneration mode operation to heat exhaust from the genset;
- and
- regulating the amount of power applied to the load bank/heater during the filter regeneration mode operation to maintain the temperature of the exhaust in the AT system within a DPF filter regeneration temperature range.
An exhaust aftertreatment (AT) system for use with a genset, including:
- a load bank/heater configured to be powered by the genset and to heat exhaust from the genset;
- a selective catalytic reduction (SCR) section for treating the heated exhaust;
- a temperature sensor to monitor the temperature of the exhaust;
- and
- a control system coupled to the load bank/heater and the temperature sensor, to regulate the amount of power applied from the genset to the load bank/heater during genset operation to maintain the temperature of the exhaust in the AT system within an SCR operating temperature range.
An exhaust aftertreatment (AT) system for use with a genset, including:
- a load bank/heater configured to be powered by the genset and to heat exhaust from the genset;
- a diesel particulate filter (DPF) section to filter the heated exhaust;
- a selective catalytic reduction (SCR) section to process the heated exhaust;
- a temperature sensor to monitor the temperature of the exhaust;
- and
- a control system coupled to the load bank/heater and the temperature sensor to operate the AT system in a run mode and a DPF filter regeneration mode and switch the system between the run mode and the filter regeneration mode, wherein:
- in the run mode the control system regulates the amount of power applied to the load bank/heater to maintain the temperature of the exhaust within an SCR operating temperature range;
- and
- in the DPF filter regeneration mode the control system regulates the amount of power applied to the load bank/heater to maintain the temperature of the exhaust within a DPF filter regeneration temperature range that is different than the SCR operating temperature range.
Dependencies are inferred from the claim text.