Apparatus and method for controlling nitrogen oxide sensor of hybrid vehicle
AssigneesHyundai Motor Company, Kia Motors Corporation
InventorJeong Sik JIN
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Abstract
A method of controlling a nitrogen oxide sensor of a hybrid vehicle includes: determining whether starting of a vehicle is turned on according to a manipulation of a starting switch; determining whether an engine is operating; determining whether a control condition of a nitrogen oxide sensor is satisfied; and measuring, if an engine is operating and if a control condition of a nitrogen oxide sensor is satisfied, a concentration of nitrogen oxide that is included in an exhaust gas by heating the nitrogen oxide sensor.
Claims13
A method of controlling a nitrogen oxide sensor of a hybrid vehicle, the method comprising:
- determining whether starting of a vehicle is turned on according to a manipulation of a starting switch;
- determining whether an engine is operating;
- determining whether a control condition of a nitrogen oxide sensor is satisfied;
- and
- measuring, a concentration of nitrogen oxide in an exhaust gas by heating the nitrogen oxide sensor when the engine is operating and the control condition of the nitrogen oxide sensor is satisfied.
A nitrogen oxide sensor control apparatus of a hybrid vehicle, the nitrogen oxide sensor control apparatus comprising:
- an exhaust pipe through which an exhaust gas discharged from an engine flows;
- a selective catalytic reduction (SCR) catalyst that is installed in the exhaust pipe to reduce nitrogen oxide in the exhaust gas;
- an exhaust temperature sensor that is installed at a front end of the SCR catalyst configured to measure a temperature of the exhaust gas and a dew point temperature;
- first and second nitrogen oxide sensors installed at a front end and a rear end of the SCR catalyst, respectively, and configured to measure a concentration of nitrogen oxide in the exhaust gas;
- and
- a controller configured to control measuring of the concentration of nitrogen oxide in the exhaust gas by heating the nitrogen oxide sensors while the engine is operating and when a control condition of the nitrogen oxide sensor is satisfied.
Dependencies are inferred from the claim text.