Hybrid vehicle with exhaust gas purifying unit and driving control method therefor

A non-transitory computer-readable recording medium containing program instructions executed by a processor, the non-transitory computer-readable medium comprising:

• program instructions that determine a driving environment condition including a first condition related to at least a driving load when a request for operating an exhaust gas purifying unit is received, wherein the exhaust gas purifying unit includes a filter;
• program instructions that determine a state of an engine clutch and an operation condition of the exhaust gas purifying unit when the exhaust gas purifying unit operates according to a result of determining the driving environment condition;
• and
• program instructions that operate the exhaust gas purifying unit while maintaining the state of the engine clutch determined when the driving environment condition is satisfied;
• wherein the first condition is a gradient;
• wherein determining the state of the engine clutch includes:
• determining the state of the engine clutch to be a disengaged state when the gradient corresponds to downhill;
• determining the state of the engine clutch to be an engaged state when the gradient corresponds to uphill;
• determining a first entry ratio when the gradient corresponds to downhill;
• and
• determining a second entry ratio when the gradient corresponds to uphill;
• wherein determining the driving environment condition includes converting the first entry ratio or the second entry ratio into power;
• wherein, when the entry ratio is converted into the power, the power converted added to outputtable power of the electric motor, thereby finally determining whether to enter operation of the exhaust gas purifying unit;
• and
• wherein the larger the first entry ratio or the second entry ratio, the faster the entry operation of the exhaust gas purifying unit, and the longer an operation time of the exhaust gas purifying unit.

A hybrid vehicle including an electric motor, an engine including an exhaust gas purifying unit, and an engine clutch disposed between the electric motor and the engine, the hybrid vehicle comprising:

• a first controller configured to control the engine and to request operation of the exhaust gas purifying unit, wherein the exhaust gas purifying unit includes a filter;
• and
• a second controller configured to:
• determine a driving environment condition including a first condition related to at least a driving load when the request is received,
• determine a state of the engine clutch and an operation condition of the exhaust gas purifying unit when the exhaust gas purifying unit operates according to a result of determining the driving environment condition, and
• operate the exhaust gas purifying unit while maintaining the state of the engine clutch determined when the driving environment condition is satisfied;
• wherein the first condition is a gradient;
• wherein the second controller determines the state of the engine clutch to be a disengaged state when the gradient corresponds to downhill and determines the state of the engine clutch to be an engaged state when the gradient corresponds to uphill;
• wherein the second controller determines a first entry ratio when the gradient corresponds to downhill and determines a second entry ratio when the gradient corresponds to uphill;
• wherein the second controller converts the first entry ratio or the second entry ratio into power;
• wherein, when the entry ratio is converted into the power, the power is converted is added to outputtable power of the electric motor, thereby finally determining whether to enter operation of the exhaust gas purifying unit;
• and
• wherein the larger the first entry ratio or the second entry ratio, the faster entry operation of the exhaust gas purifying unit, and the longer an operation time of the exhaust gas purifying unit.