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发明授权
CN105612320B 排气净化系统 失效 - 权利终止

排气净化系统
摘要：
本发明涉及一种排气净化系统，高精度地检测DPF的PM堆积量。该排气净化系统具备：DOC(21)，设置于发动机(10)的排气通路(12)；DPF(22)，设置于比DOC(21)靠下游侧的排气通路(12)，捕集排气中的PM；电极(27)，对DOC(21)的静电电容进行检测；PM堆积量推测部(51)，基于从电极(27)输入的静电电容，推测DPF(22)的PM堆积量；以及强制再生控制部(53)，当从PM堆积量推测部(51)输入的PM堆积量超过规定量时，朝DOC(21)喷射燃料，执行至少将堆积于DPF(22)的PM燃烧除去的强制再生。
摘要（英）：

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 passage (12) of an engine (10); a DPF (22) provided on the exhaust passage (12) at a position downstream of the DOC (21) to collect the PM contained in exhaust gas; electrodes (27) that detect a capacitance of the DOC (21); a PM accumulation estimating unit (51) that estimates an amount of PM accumulated in the DPF (22) on the basis of the capacitance received from the electrodes (27); and a forced regeneration control unit (53) that injects fuels into the DOC (21) and performs forced regeneration that burns and removes at least the PM accumulated in the DPF (22) when the accumulated PM amount that is received from the PM accumulation estimating unit (51) surpasses a predetermined amount.

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