The present invention relates to an exhaust purification system and detects an amount of PM accumulated in a DPF with high precision. The exhaust purification system includes: a DOC (21) provided on an exhaust path (12) of an engine (10); an upstream DPF (...

The invention relates to a method for operating a vehicle, in particular a watercraft, wherein the vehicle (1) has at least one internal combustion engine (19), in particular one emitting pollutants (35) contained in exhaust gas and/or in wastewater, where...

An engine 1 includes: a urea water injector 40 which is provided in an exhaust pipe 30 of the engine 1 mounted on a vehicle and which injects and supplies urea water into the exhaust pipe 30; a selective reduction catalyst 34 which is provided in the exhau...

There is provided an exhaust gas purifying apparatus for an engine 1 including a urea water injector 40 and a low-pressure exhaust gas recirculation passage 45. The urea water injector 40 supplies urea water to an upstream side of selective reduction catal...

An engine has a LPL-EGR mechanism that recirculates low-pressure EGR gas from the downstream of a NSR catalyst in an exhaust gas emission system to an intake air system via a EGR cooler. A NOx-storage level is calculated for a low-temperature NOx-storing m...

An exhaust heating apparatus (37) according to the present invention, for heating exhaust being led to an exhaust emission purifier (30) from an internal combustion engine (10) in which a first exhaust turbocharger (28) and a second exhaust turbocharger (2...

A method of cooling recirculated exhaust gas from an exhaust manifold (27) of an engine (16) upstream of an intake manifold (29), the method including passing the recirculated exhaust gas from the exhaust manifold through a heat exchanger (36), and convect...

Particles smaller than 50 nanometers emitted from an internal combustion engine, and serving as nuclei for forming PM (particulate matter), are removed to decrease the number of PM particles that are emitted to atmosphere. High efficiency filters are provi...

The apparatus has a primary exhaust gas moved in a direction (30) of a common exhaust (22) and arranged for all cylinders. Periodically, on instruction of a motor control, the fuel injected is increased and the hydrocarbon concentration in the exhaust gas ...