EXHAUST EMISSION CONTROL DEVICE OF ENGINE

摘要

PROBLEM TO BE SOLVED: To increase an exhaust performance in regeneration while securing the regeneration efficiency of a filter.

SOLUTION: When a DPF is forcibly regenerated, a fuel is supplied to an oxidation catalyst using a cylinder post injection when an engine is under low load or rotated at low speeds and using only an exhaust pipe fuel adding valve when the engine is under high load and rotated at high speeds. The recirculation of exhaust gas by an EGR device is restricted during the regeneration by the cylinder post injection.

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