Catalyst temperature control system for a hybrid engine
AssigneeCaterpillar Inc.
InventorsBrian C. Applegate, William L. Easley, Jr., Michael S. Bond
Life of this patent
Estimating the term…
Abstract
A temperature control system is provided for use with a hybrid engine. The system includes a controller configured to receive a signal representative of a temperature associated with a selective catalytic reduction (SCR) catalyst configured to receive an exhaust gas stream produced by a hybrid engine. The controller is also configured to transmit a first signal to a generator operably coupled to a battery and the hybrid engine, and transmit a second signal to a heater configured to heat the SCR catalyst, wherein the first and second signals are configured to regulate the temperature associated with the SCR catalyst.
Claims11
A power system, comprising:
- a hybrid engine configured to produce an exhaust gas stream;
- a generator operably coupled to the hybrid engine and configured to supply electrical power to a battery;
- a selective catalytic reduction (SCR) catalyst configured to receive the exhaust gas stream;
- a heater configured to heat the SCR catalyst;
- and
- a controller operably connected to the generator and the heater, wherein the controller is configured to:
- receive a signal representative of a temperature associated with the SCR catalyst and a signal representative of a power level of the battery, and to
- control the heater and the generator based at least in part on the temperature associated with the SCR catalyst and the power level of the battery,
- wherein controlling the generator based at least in part on the temperature associated with the SCR catalyst includes:
- loading the hybrid engine with the generator, in response to the power level of the battery being below a predefined threshold, to heat the exhaust gas stream, and
- maintaining the temperature associated with the SCR catalyst within a predefined range via the heated exhaust gas stream while the power level of the battery is below the predefined threshold.
Dependencies are inferred from the claim text.