Patent ID: 7886525
Filing Date: 2011-02-15
Classification: F01N,Y02T,Y10T

Abstract:
1. An exhaust gas purification device of an internal combustion engine, comprising: a storage tank storing an exhaust gas purification solution that is injected into an exhaust passage of the internal combustion engine; a solution supply line that is constructed to introduce the exhaust gas purification solution from the storage tank to the exhaust passage; a supply pump disposed on the solution supply line; and a gas-liquid selection device, wherein the gas-liquid selection device is constructed to selectively introduce the exhaust gas purification solution and air into the solution supply line, wherein the exhaust gas purification solution is injected from the solution supply line into the exhaust passage when the internal combustion engine is operated, thereby purifying an exhaust gas in the exhaust passage, and wherein air in the storage tank is fed into the solution supply line when the internal combustion engine is stopped, thereby evacuating the solution supply line.