ENGINE

• Main Authors: YUGAWA YOJI, TANAKA HIROKI, NISHIOKA TAKAAKI, ONISHI KENYA
• Format: Patent
• Language: English; Japanese
• Published: 30.04.2015
• Subjects: BLASTING; CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TOTRANSPORTATION; COMBUSTION ENGINES; COMBUSTION ENGINES IN GENERAL; 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 provide an engine that enables improvement of responsiveness of supercharger during low-speed rotation of the supercharger and engine fuel economy FC during high-speed rotation of the supercharger.SOLUTION: In an engine 1 including a supercharger 3, three or more exhaust manifolds 8-11 are connected to the supercharger 3, respectively. Each of the exhaust manifolds 8-11 is connected by a connecting pipe 12, and on-off valves 12b, 12d, 12f for making the respective exhaust manifolds 8-11 independent are arranged in the connecting pipes 12, respectively. With respect to each speed N of the engine 1, a first reference value La and a second reference value Lb of a load factor L(n) of the engine 1 are set. When the load factor L(n) is less than the first reference value La, all of the on-off valves are closed. When the load factor L(n) is equal to or more than the first reference value La and is less than the second reference value Lb, part of the on-off valves is opened. When the load factor L(n) is equal to or more than the second reference value Lb, all of the on-off valves are opened. 【課題】過給機の低速回転時における過給機の応答性と過給機の高速回転時におけるエンジンの燃費ＦＣとを向上させることができるエンジンを提供する。【解決手段】３以上の排気マニホールド８から１１が過給機３にそれぞれ接続されている過給機３付きのエンジン１であって、各排気マニホールド８から１１が連結管１２によってそれぞれ連結され、各連結管１２には各排気マニホールド８から１１を独立した状態にする開閉弁１２ｂ・１２ｄ・１２ｆがそれぞれ設けられ、エンジン１の回転数Ｎ毎にエンジン１の負荷率Ｌ（ｎ）における第一基準値Ｌａと第二基準値Ｌｂとが設定され、負荷率Ｌ（ｎ）が第一基準値Ｌａ未満の場合、全ての開閉弁を閉状態にし、負荷率Ｌ（ｎ）が第一基準値Ｌａ以上であって第二基準値Ｌｂ未満の場合、一部の開閉弁を開状態にし、負荷率Ｌ（ｎ）が第二基準値Ｌｂ以上の場合、全ての開閉弁を開状態にする。【選択図】図２