EXHAUST EMISSION CONTROL DEVICE FOR DIESEL ENGINE AND DIESEL ENGINE SYSTEM

• Main Author: IKEDA TAKUJI
• Format: Patent
• Language: English; Japanese
• Published: 25.05.2017
• Subjects: BLASTING; 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; LIGHTING; MACHINES OR ENGINES IN GENERAL; MECHANICAL ENGINEERING; PERFORMING OPERATIONS; PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL; SEPARATION; STEAM ENGINES; TRANSPORTING; WEAPONS

PROBLEM TO BE SOLVED: To provide an exhaust emission control device for a diesel engine and a diesel engine system that can inhibit clogging of a diesel oxidation catalyst when an exhaust flow rate is small.SOLUTION: An exhaust emission control device 10 for a diesel engine includes: a baffle plate 30; and a diesel oxidation catalyst 40 disposed downstream of the baffle plate. In the exhaust emission control device for the diesel engine, the baffle plate has an opening portion 34 through which exhaust gas passes and has a structure that can change an area of the opening portion. The exhaust emission control device further includes a drive mechanism for driving the baffle plate so that the area of the opening portion of the baffle plate is reduced when an exhaust flow rate flowing into the baffle plate 30 is relatively small compared to when the exhaust flow rate is relatively large.SELECTED DRAWING: Figure 2 【課題】排気流量が少ない場合におけるディーゼル酸化触媒の目詰まりを抑制することができるディーゼル機関の排気浄化装置及びディーゼル機関システムを提供する。【解決手段】ディーゼル機関の排気浄化装置１０は、バッフルプレート３０と、該バッフルプレートよりも下流側に配置されたディーゼル酸化触媒４０と、を備えるディーゼル機関の排気浄化装置において、バッフルプレートは、排気が通過する開口部３４を有するとともに、開口部の面積を変更可能な構造を有し、排気浄化装置は、バッフルプレート３０に流入する排気流量が相対的に少ない場合の方が排気流量が相対的に多い場合よりもバッフルプレートの開口部の面積が減少するように、バッフルプレートを駆動する駆動機構をさらに備えることを特徴とする。【選択図】図２