摘要:
An exhaust gas purification apparatus, for an engine having a combustion chamber, comprising an exhaust passage, a particulate filter arranged in the exhaust passage for removing particulate in exhaust gas exhausted from the combustion chamber by oxidation, and a device for controlling the characteristics of the exhaust gas flowing into the particulate filter, wherein, when the judging means judges that the particulate filter will be deteriorated by heat, the controlling device changes the characteristics of the exhaust gas flowing into the particulate filter to prevent the particulate filter from being deteriorated by heat.
摘要:
An exhaust control valve (24) is arranged in an exhaust pipe (22) of an internal combustion engine. At the time of engine startup and warmup operation, the exhaust control valve (24) is substantially fully closed, the amount of injection of main fuel is increased from the optimum amount of injection at the time when the exhaust control valve is fully opened, auxiliary fuel is additionally injected during the expansion stroke, and thereby the unburned hydrocarbons exhausted into the atmosphere is greatly reduced at the time of engine startup and warmup operation.
摘要:
When performing temperature elevation control at a first exhaust purification device, a second exhaust purification device is prevented from being raised in temperature to a set temperature or more.
摘要:
An SOX trap catalyst (11) in which at least one of an alkali metal and alkali earth metal is carried diffused is arranged in an exhaust passage of an internal combustion engine. By holding the temperature of the SOX trap catalyst (11) during engine operation at the temperature where a nitrate of the at least one of the alkali metal and alkali earth metal becomes the melted state, a nitrate movement and coagulation action where the nitrate in the SOX trap catalyst (11) moves to and coagulates at the surface of the SOX trap catalyst (11) is promoted. Due to this nitrate movement and coagulation action, SOX is removed while restoring the SOX trap rate.
摘要:
In an internal combustion engine, an NOx selective reducing catalyst is arranged inside an engine exhaust passage, an oxidation catalyst is arranged upstream of the NOx selective reducing catalyst, and an NOx adsorption catalyst is arranged upstream of the oxidation catalyst. The NOx adsorption catalyst has a property of releasing NOx when the temperature rises and a property of trapping the SOx contained in the exhaust gas. The inflow of SOx into the oxidation catalyst is suppressed by the NOx adsorption catalyst to prevent the NO released from the NOx adsorption catalyst being oxidized to NO2 at the oxidation catalyst from being obstructed by SOx.
摘要:
In an exhaust purification system of an internal combustion engine comprising an exhaust purification device which receives a bad influence from SOX in the exhaust gas and a S trap device arranged upstream of the exhaust purification device, which can store SOX in the exhaust gas, an amount of SOX passing through the S trap device is integrated as an integrated value, each allowance value of the integrated value for each elapsed period from the start time of the use of the S trap device is set, and when the current integrated value exceeds the corresponding allowance value and between a first set period ago and the current time, fuel has been supplied into the fuel tank and engine oil has not been exchanged, it is determined that fuel with a high concentration of sulfur has been supplied into the fuel tank.
摘要:
In an internal combustion engine, the engine is formed so that an output of an electric motor can be superposed on an output of the engine. An SOX trap catalyst able to trap the SOX contained in the exhaust gas is arranged inside the engine exhaust passage upstream of the NOX storage catalyst. The vehicle drive power from the engine and the vehicle drive power from the electric motor are adjusted so that the SOX trap rate of the SOX trap catalyst is maintained at a predetermined high SOX trap rate.
摘要:
An internal combustion engine in which a front end catalyst (12) and rear end catalyst (14) comprising NOx storing catalysts are arranged in an engine exhaust passage. When these catalysts (12, 14) should recover from SOx poisoning, SOx poisoning recovery proceeding is performed in which the temperatures of the corresponding catalysts (12, 14) are raised to the SOx release temperature and the air-fuel ratio of the exhaust gas flowing into the corresponding catalysts (12, 14) is made rich. In this case, the frequency of performing the SOx poisoning recovery proceeding of the rear end catalyst (14) is made higher than the frequency of performing the SOx poisoning recovery proceeding of the front end catalyst (12).
摘要:
An internal combustion engine in which an SOx trapping catalyst (12) and particulate filter (13) are arranged in a engine exhaust passage and in which a recirculation exhaust gas takeout port (17) is formed in the engine exhaust passage downstream of the particulate filter (13). Inside the engine exhaust passage downstream of the recirculation exhaust gas takeout port (17), an NOx storing catalyst (15) and a reducing agent feed valve (21) are arranged. When NOx should be released from the NOx storing catalyst (15), reducing agent is fed into the exhaust passage from the reducing agent feed valve (21).
摘要:
An exhaust purification device, including a NOx storing catalyst comprised of a precious metal catalyst and NOx absorbent, arranged in an engine exhaust passage, which increases the ratio of the nitrogen dioxide to the nitrogen monoxide produced when burning fuel under a lean air-fuel ratio when the NOx storing catalyst is not active compared with the time when the NOx storing catalyst is active under the same engine operating conditions and stores the nitrogen dioxide contained in the exhaust gas in the NOx absorbent at that time.
摘要翻译:一种排气净化装置,其包括设置在发动机排气通道中的由贵金属催化剂和NO x吸收剂构成的NO x x存储催化剂,其增加氮的比例 当储存催化剂的NO x存储催化剂不起作用时,与惰性空气燃料比燃烧燃料时产生的一氧化氮相比,当NO x x存储催化剂为 在相同的发动机工作条件下起作用,并将废气中所含的二氧化氮储存在NO x吸收剂中。