초록 ▼

A first filter is disposed in an engine exhaust passage. A second filter is disposed in the engine exhaust passage at a location downstream of the first filter. Thus, the first and second filters are connected in series with one another. The first and second filters are designed so that an amount of

A first filter is disposed in an engine exhaust passage. A second filter is disposed in the engine exhaust passage at a location downstream of the first filter. Thus, the first and second filters are connected in series with one another. The first and second filters are designed so that an amount of exhaust particles trapped by the first filter is greater than an amount of exhaust particles trapped by the second filter. A pressure across the series combination of the filters may be detected. The filters may be rejuvenated when the detected pressure across the series combination of the filters reaches a reference pressure.

대표청구항 ▼

An exhaust particle removing system for an engine comprising: (a) first and second filter means disposed separately in an exhaust passage of the engine and connected in series with one another, the first filter residing at a location upstream of the second filter, the first filter being operative to

An exhaust particle removing system for an engine comprising: (a) first and second filter means disposed separately in an exhaust passage of the engine and connected in series with one another, the first filter residing at a location upstream of the second filter, the first filter being operative to trap an amount of exhaust particles greater than an amount of exhaust particles trapped by the second filter; (b) means for sensing a pressure across the series combination of the first and second filter means; and (c) means for rejuvenating the first and second filter means, when the sensed pressure reaches a reference pressure, (d) said first filter comprising sub-filters respectively disposed in branches of an exhaust manifold of the engine.