An exhaust after treatment apparatus for an internal combustion engine capable of suppressing excess of fuel component efficiently when it is determined that the operating state is such that the active state of the exhaust after treatment device is not maintainable. The exhaust after treatment…
Provided is an exhaust injection control method for an exhaust gas aftertreatment device that can perform optimal exhaust pipe injection in accordance with a catalyst temperature and a degree of catalyst deterioration when exhaust pipe injection is performed during DPF regeneration. When PM has…
An exhaust gas purifier for an internal combustion engine (10) capable of removing a deposit from an addition nozzle (32) without consuming excessive fuel is provided. The addition nozzle (32) included in the exhaust gas purifier adds fuel to exhaust gas in an exhaust passage (27, 28), which guides…
An object of the invention is to prevent, in an internal combustion engine (1) equipped with a supercharger (8), excessive increase in the turbine expansion ratio resulting from a decrease in the atmospheric pressure, while reducing the decrease in the supercharging pressure. A filter (12) for…
A three-way catalyst (20) having an oxygen storage function and an exhaust purification catalyst (22) are arranged in the exhaust passage of an internal combustion engine. During medium-load operation of the engine the degree of lean of the air-fuel ratio in the combustion chamber (5) is increased…
An exhaust gas control system (10) includes a DOC (oxidation catalyst) (52) and a DPF (particulate filter) (53) in an exhaust passage. The exhaust gas control system executes feedback control over an amount of energy supplied to the DPF (post fuel injection amount) such that an actual temperature…
An exhaust purification system of an internal combustion engine is provided with an exhaust purification catalyst which removes NO x and a post treatment device. The exhaust purification catalyst has the property of reducing NO x if making the concentration of hydrocarbons vibrate by within a…
An object of this invention is to maintain favorable exhaust emissions while preventing clogging of a fuel addition valve. An engine 10 includes a fuel addition valve 34 that adds fuel to exhaust gas. The fuel addition valve 34 executes a fuel addition operation when a reduction process of an…
Provided is an exhaust pipe injection control device capable of controlling an appropriate fuel injection amount regardless of engine rotation speed. The exhaust pipe injection control device includes: a target injection amount setting unit 172 which sets, according to an engine rotation speed and…
Provided is an exhaust pipe injection control device capable of optimally controlling an degree of EGR opening during DPF regeneration. The device comprises a regeneration-time opening control unit (173) which controls a degree of EGR opening of an EGR device (123) during DPF regeneration. The…
A fuel spray nozzle 16 has a cylindrical spray block 18 with an inner air passage 17 for flow of nebulizing air 4' and a fuel injection valve 20 for injection of fuel intermediately of the inner air passage 17 in the spray block 18 at a flow rate adjusted by duty control. The nebulizing air is…
The exhaust purification system of an internal combustion engine of the present invention is provided with an NO x storage reduction catalyst and a particulate filter which is arranged at the upstream side of the NO x storage reduction catalyst. When causing the NO x storage reduction catalyst to…
An exhaust gas purifier for an internal combustion engine (10) capable of removing a deposit from an addition nozzle (32) without consuming excessive fuel is provided. The addition nozzle (32) included in the exhaust gas purifier adds fuel to exhaust gas in an exhaust passage (27, 28), which guides…
The method involves determining a set point temperature of gas, and determining a temperature request for controlling the temperature. A stationary gain is defined as ratio between a stationary value of a variation and a stationary value of a hydrocarbon mass flow rate variation. A control law for…
The device has a fuel injector (2) for injecting fuel under an injection pressure into an exhaust line (4) through a radial opening (5) in a pipe section. The injector is connected indirectly through an injector mount to a coolant circulation system (7) to transfer heat. An injector receptacle (10)…
An apparatus for controlling an exhaust purifying catalyst has a high sulfur switch (84) that is switched between an on state and an off state by an occupant such as a driver according to the sulfur concentration level of the fuel used. The control procedure of sulfur poisoning elimination control…
A temperature sensor (9) is fitted in the exhaust of an internal combustion engine (1) downstream of the catalyser or of the particle filter if no catalyser is fitted. The exhaust temperature (Te) is compared (12) to a reference value (Tc) set by the vehicle calculator (4) and the departure (eta)…
An exhaust gas purification device of an internal combustion engine in accordance with the present invention is provided with a NOx absorbent (70), which is provided in an exhaust passage (106,107) of the internal combustion engine (101), for occluding nitrogen oxide when an oxygen concentration of…