EXHAUST EMISSION CONTROL DEVICE FOR INTERNAL COMBUSTION ENGINE

• Main Author: KORENAGA SHINGO
• Format: Patent
• Language: English; Japanese
• Published: 05.04.2018
• 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 an exhaust emission control device for an internal combustion engine, capable of reducing the possibility of wasting fuel by performing/not performing PM (Particulate Matter) removal treatment based on the consideration that a change in the electrical resistivity of PM depends on the temperature of the PM.SOLUTION: The exhaust emission control device comprising an electric heating type catalyst, for an internal combustion engine performs PM removal control to remove particulate matter deposited on the electric heating type catalyst by raising the temperature of the electric heating type catalyst using energy discharged from the engine into an exhaust passage (S409) if PM temperature and an insulation resistance value (a resistance value between a catalyst carrier and a case) satisfy predetermined removal conditions to be satisfied when the particulate matter deposited on the electric heating type catalyst should be removed (S408).SELECTED DRAWING: Figure 7 【課題】ＰＭの電気抵抗率がＰＭの温度に依存して変化することを考慮した上でＰＭ除去処理を実行したり実行しなかったりすることにより、無駄に燃料を消費する可能性を低下することができる、内燃機関の排気浄化装置を提供する。【解決手段】電気加熱式触媒を備える内燃機関の排気浄化装置は、電気加熱式触媒に堆積した粒子状物質を除去すべきであるときに満たす所定の除去条件をＰＭ温度と絶縁抵抗値（触媒担体とケースとの間の抵抗値）とが満たす場合（Ｓ４０８）、機関から排気通路へと排出されるエネルギによって電気加熱式触媒を昇温させることにより前記堆積した粒子状物質を除去するＰＭ除去制御を実行する（Ｓ４０９）。【選択図】図７