초록 ▼

An exhaust passage extends from an internal combustion engine to conduct exhaust from the engine. A filter is disposed in the exhaust passage to filter particles out of the exhaust. A burner is disposed in the exhaust passage upstream of the filter to burn off the particles retained by the filter. A

An exhaust passage extends from an internal combustion engine to conduct exhaust from the engine. A filter is disposed in the exhaust passage to filter particles out of the exhaust. A burner is disposed in the exhaust passage upstream of the filter to burn off the particles retained by the filter. A sensor senses the pressure across the filter and generates a signal indicative thereof. Another sensor senses an operating condition of the engine. A first device generates a primary reference signal on the basis of the sensed engine operating condition. A second device samples the pressure signal when the pressure sensor is subject to a zero pressure difference. A third device stores the sampled pressure signal. A fourth device corrects the primary reference signal on the basis of the stored pressure signal and generates a secondary reference signal reflecting the correction. A fifth device compares the pressure signal to the secondary reference signal and generates a signal reflecting the result of the comparison. A sixth device activates the burner on the basis of the comparison signal.

대표청구항 ▼

An exhaust particle removing system for an internal combustion engine, comprising: (a) an exhaust passage extending from the engine for conducting exhaust from the engine; (b) a filter disposed in the exhaust passage for filtering particles out of the exhaust; (c) a burner disposed in the exhaust pa

An exhaust particle removing system for an internal combustion engine, comprising: (a) an exhaust passage extending from the engine for conducting exhaust from the engine; (b) a filter disposed in the exhaust passage for filtering particles out of the exhaust; (c) a burner disposed in the exhaust passage at a point upstream of the filter for burning off the particles retained by the filter; (d) a pressure sensor for sensing the pressure across the filter and generating a signal indicative thereof; (e) an engine condition sensor for sensing an operating condition of the engine and generating a signal indicative thereof; (f) means for generating a primary reference signal on the basis of the engine operating condition signal; (g) means for sampling the pressure signal when the pressure sensor is subject to a zero pressure difference; (h) means for storing the sampled pressure signal; (i) means for correcting the primary reference signal on the basis of the stored pressure signal and generating a secondary reference signal reflecting the correction; (j) means for comparing the pressure signal to the secondary reference signal and generating a signal reflecting the result of the comparison; and (k) means for activating the burner on the basis of the comparison signal.