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The Mitsubishi 4N1 engine is a family of all-alloy four-cylinder diesel engines developed by Mitsubishi Motors, produced at the company's powertrain facility in Kyoto, Japan for use in Mitsubishi's small to mid-sized global passenger cars.〔("Environmental Highlights of the 2007 Tokyo Motor Show" ), Keith Hardy, .pdf file, Advanced propulsion news〕〔("Joint Development of a New Generation Diesel Engine" ), Mitsubishi Motors press release〕〔("Mitsubishi Motors to Bring Forward Market Introduction of Next-generation Diesel Car Engine" ), Mitsubishi Motors press release〕 In June 2006, Mitsubishi Motors and Mitsubishi Heavy Industries announced a joint development project for a new generation of clean diesel engines to be used in cars exported to Europe with a target of beginning mass production in 2010〔 and later announced that the engines will be gradually phased into other global markets.〔〔("Mitsubishi Motors Lineup at 2007 North American International Auto Show" ), Mitsubishi Motors press release〕 The preliminary version of the 1798 cc engine was first seen in the Concept-cX test car introduced in 2007. The larger 2268 cc was first exhibited in the Concept-ZT test car introduced in the same year and later used in the Concept-RA test car introduced in 2008.〔("MITSUBISHI Concept-cX" ), Mitsubishi Motors press release〕〔("Mitsubishi Motors lineup at the 40th Tokyo Motor Show" ), Mitsubishi Motors press release〕〔("Mitsubishi Motors new "MITSUBISHI Concept-RA" to receive global premiere at 2008 Detroit Motor Show ), Mitsubishi Motors press release〕〔("Mitsubishi Motors Lineup at 2008 North American International Auto Showto receive global premiere at 2008 Detroit Motor Show ), Mitsubishi Motors press release〕 With a clean diesel emission performance in mind, all engines are designed to comply with Tier 2 Bin 5 emission regulations in the United States, Euro 5 standard in Europe and Japan's Post New Long Term regulations.〔〔〔 Together with Mitsubishi's electric vehicle technology the new diesel engines are positioned as a core element in the Mitsubishi Motors Environment Initiative Program 2010 (EIP 2010) announced in July 2006.〔〔("Mitsubishi Motors Environment Initiative Program 2010" ), Mitsubishi Motors press release〕 The 4N1 engine family is the world's first to feature a variable valve timing (intake side) system applied to passenger car diesel engines.〔Mitsubishi Motors UK Geneva motor show 2010 presskit〕 All engines developed within this family have aluminum cylinder block, double overhead camshaft layouts, four valves per cylinder, a common rail injection system with a variable geometry turbocharger and ''MIVEC'' variable valve timing. ==Engine family characteristics== Mitsubishi's new clean diesel engines use a high-pressure common rail injection system to improve combustion efficiency. The ''4N13'' 1.8-liter uses solenoid fuel-injectors. The larger ''4N14'' 2.3-liter engine uses piezo fuel-injectors that produce a finer fuel spray. Both engines feature a fast ceramic glowplug system. The engines are designed to operate at a lower compression ratio, thus lowering the combustion pressure, allowing the use of an aluminium cylinder block that reduces weight.〔〔("Mitsubishi Reveals New Concept-cX" ), Mitsubishi Motors Australia press release〕 The ''4N13'' 1.8-liter engine uses a Variable Geometry (VG) turbocharger with a variable vane turbine, which provides optimal boost pressure control for different driving conditions. The ''4N14'' 2.3-liter engine also uses a VG turbocharger plus a Variable Diffuser (VD) that uses both variable geometry vanes in the turbine housing and a compressor with variable vanes in the diffuser passage, further improving combustion efficiency.〔〔 Within the engine, Mitsubishi used an offset angle crankshaft that reduces friction, therefore noise and vibration, allowing the engine to run smoothly and quietly at all engine speeds.〔〔 To meet the requirements of global emissions standards, Mitsubishi developed a new catalyst system that combines a Diesel Oxidation Catalyst (DOC), NOx Trap Catalyst (NTC) and Diesel Particulate Filter (DPF).〔〔 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Mitsubishi 4N1 engine」の詳細全文を読む スポンサード リンク
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