Exhaust gas post processing system

Abstract

An exhaust gas post processing system may include an exhaust line for an exhaust gas exhausted from an engine to pass, a gasoline particulate filter that is disposed on the exhaust line to filter harmful materials included in the exhaust gas, a bypass line that is disposed on the exhaust line such that the exhaust gas bypasses the gasoline particle filter, and a control portion that detects a driving condition of the engine and makes the exhaust gas pass the gasoline particulate filter or makes the exhaust gas bypasses the gasoline particulate filter according to the detected driving condition.

1 . An exhaust gas post processing system, comprising:
 an exhaust line for an exhaust gas exhausted from an engine to pass;   a gasoline particulate filter that is disposed on the exhaust line to filter harmful materials included in the exhaust gas;   a bypass line that is disposed on the exhaust line such that the exhaust gas bypasses the gasoline particle filter; and   a control portion that detects a driving condition of the engine and makes the exhaust gas pass or bypass the gasoline particulate filter according to the detected driving condition.   
     
     
         2 . The exhaust gas post processing system of  claim 1 , wherein a main valve is disposed at an upstream side of the gasoline particle filter to selectively cut off the exhaust gas flowing into the gasoline particle filter, and the control portion closes the main valve such that the exhaust gas passes the bypass line. 
     
     
         3 . The exhaust gas post processing system of  claim 1 , wherein a bypass valve is disposed on the bypass line to selectively cut off the exhaust gas passing the bypass line. 
     
     
         4 . The exhaust gas post processing system of  claim 2 , wherein the control portion makes the exhaust gas pass the gasoline particulate filter if the heating logic is performed so as to heat the gasoline particle filter. 
     
     
         5 . The exhaust gas post processing system of  claim 2 , wherein the control portion detects a rotation speed of the engine and makes the exhaust gas pass the gasoline particle filter if the rotation speed exceeds a predetermined value. 
     
     
         6 . The exhaust gas post processing system of  claim 2 , wherein the control portion detects a coolant temperature of the engine and makes the exhaust gas pass the gasoline particle filter if the coolant temperature is lower than a predetermined value. 
     
     
         7 . The exhaust gas post processing system of  claim 2 , wherein the control portion detects an oil temperature of the engine and makes the exhaust gas pass the gasoline particle filter if the oil temperature is lower than a predetermined value. 
     
     
         8 . The exhaust gas post processing system of  claim 2 , wherein the control portion detects a speed of a vehicle and makes the exhaust gas pass the gasoline particle filter if the speed is higher than a predetermined value. 
     
     
         9 . The exhaust gas post processing system of  claim 2 , wherein the control portion may make the exhaust gas pass the bypass line rather than the gasoline particle filter, if a heating logic for heating the gasoline particle filter is not performed, if a rotation speed of the engine is lower than a predetermined value, if a coolant temperature of the engine is higher than a predetermined value, if an oil temperature of the engine is higher than a predetermined value, and if a speed of a vehicle is lower than a predetermined value.