CONTROL DEVICE FOR EXHAUST EMISSION CONTROL SYSTEM

• Main Authors: FURUKAWA KENGO, MOTOO KOHEI
• Format: Patent
• Language: English; Japanese
• Published: 17.05.2018
• Subjects: BLASTING; COMBUSTION ENGINES; CONTROLLING COMBUSTION ENGINES; ENGINE PLANTS IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNALCOMBUSTION ENGINES; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES ORENGINES IN GENERAL; HEATING; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS; LIGHTING; MACHINES OR ENGINES IN GENERAL; MECHANICAL ENGINEERING; STEAM ENGINES; WEAPONS

PROBLEM TO BE SOLVED: To provide a control device for an exhaust emission control system for reducing emissions of hydrocarbon compounds that reduce nitrogen oxide included in exhaust gas to outside.SOLUTION: A control device 20 provided in an exhaust emission control system 1 includes a flow sensor 21, an oxygen concentration sensor 22, a hydrocarbon concentration sensor 24, a catalyst temperature sensor 25, a slip amount calculation section 261 and a control section 262. The flow sensor 21, the oxygen concentration sensor 22 and the catalyst temperature sensor 25 can detect a state of an exhaust emission control section 13 capable of reducing nitrogen oxide in exhaust gas. The hydrocarbon concentration sensor 24 can detect a type and concentration of hydrocarbon compounds flowing into the exhaust emission control section 13. The slip amount calculation section 261 calculates hydrocarbon slip amount that is outflow amount of the hydrocarbon compounds flowing out from the exhaust emission control section 13. The control section 262 controls a fuel addition section 11 capable of adding fuel to gas flowing in the exhaust emission control section 12 on the basis of a calculation result obtained by the slip amount calculation section 261.SELECTED DRAWING: Figure 1 【課題】 排気に含まれる窒素酸化物を還元する炭化水素化合物の外部への排出量を低減する排気浄化システムの制御装置を提供する。【解決手段】 排気浄化システム１が備える制御装置２０は、流量センサ２１、酸素濃度センサ２２、炭化水素濃度センサ２４、触媒温度センサ２５、スリップ量演算部２６１および制御部２６２を有する。流量センサ２１、酸素濃度センサ２２および触媒温度センサ２５は、排気中の窒素酸化物を還元可能な排気浄化部１３の状態を検出可能である。炭化水素濃度センサ２４は、排気浄化部１３に流入する炭化水素化合物の種類および濃度を検出可能である。スリップ量演算部２６１は、排気浄化部１３から流出する炭化水素化合物の流出量である炭化水素スリップ量を演算する。制御部２６２は、スリップ量演算部２６１における演算結果に基づいて排気浄化部１２を流れる気体に燃料を添加可能な燃料添加部１１を制御する。【選択図】 図１