CONTROL DEVICE FOR ENGINE

• Main Authors: KATO JIRO, KOGA TATSUYA, KUWABARA KAZUNORI
• Format: Patent
• Language: English; Japanese
• Published: 23.09.2016
• Subjects: BLASTING; CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TOTRANSPORTATION; COMBUSTION ENGINES; COMBUSTION ENGINES IN GENERAL; 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; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; HEATING; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS; INTERNAL-COMBUSTION PISTON ENGINES; LIGHTING; MACHINES OR ENGINES IN GENERAL; MECHANICAL ENGINEERING; STEAM ENGINES; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS; TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINSTCLIMATE CHANGE; WEAPONS

PROBLEM TO BE SOLVED: To activate a catalyst earlier.SOLUTION: An exhaust system 30 has a plurality of independent exhaust passages 31 connected to respective exhaust ports 7, an exhaust collection part 35 provided on the downstream sides of the independent exhaust passages 31 and forming a common space communicated with the independent exhaust passages 31, negative pressure changing means 39 capable of changing a negative pressure to be generated in the exhaust collection part 35, and a catalyst 48a provided on the downstream side of the exhaust collection part 35. At the cold start of an engine, the negative pressure changing means 39 is controlled to reduce the negative pressure in the exhaust collection part 35.SELECTED DRAWING: Figure 13 【課題】触媒をより早期に活性化させる。【解決手段】排気システム３０に、各排気ポート７に接続された複数の独立排気通路３１と、各独立排気通路３１の下流側に設けられて各独立排気通路３１と連通する共通の空間を形成する排気集合部３５と、排気集合部３５で発生する負圧を変更可能な負圧変更手段３９と、排気集合部３５の下流側に設けられた触媒４８ａとを設け、エンジンの冷間始動時において、排気集合部３５内の負圧が小さくなるように、負圧変更手段３９を制御する。【選択図】図１３