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The F20C and F22C1 are inline-4 engines produced by Honda. They are one of the few Honda 4-cylinder automobile engines that are designed to sit longitudinally for rear wheel drive. These engines are a distant relative to the F-series engines found in the mid 90s Honda Accord and Prelude. To get most out of the compact sized engine, Honda engineers utilized technology derived from Honda's racing engines.〔(JDM Spec Engines - Honda F20C Engine )〕 The F20C and F22C1 have two overhead cams with roller followers, a ladder-frame main bearing stiffener, a VTEC system for both the intake and exhaust camshaft, Fiber-Reinforced Metal cylinder liners (FRM), molybdenum disulfide-coated piston skirts for reduced friction, and uses a timing chain. The VTEC system consists of two separate cam lobe profiles. Variable cam phasing is not used. Roller followers are used to reduce friction in the valvetrain. The rocker arms are constructed using metal injection molding. The engine block is constructed of aluminum with fiber-reinforced metal sleeve. A timing chain drives an intermediate gear, which drives the cams. The pistons are forged aluminum. The intake plenum was designed with minimal volume for fast engine response, and a 14 lb flywheel was fitted until 2004. A high-flow catalyst is supplied along with an exhaust air-injection system, which greatly decreases catalyst light-off time and cold emissions. ==F20C== *Displacement: *Compression: 11.7:1 (Japan), 11.0:1 (North America, Europe) *Bore: *Stroke: *Rod Length: 153 mm *Rod/stroke ratio: 1.82 *Power: * *JDM 250 PS (183.88 kW) @ 8,600rpm & 22.2kgm (217.71 Nm) @ 7,500 rpm * *USDM 237 HP @ 8,300 rpm; 153 ft lb, 207 Nm @ 7,500 rpm *Redline: 9200 rpm *VTEC: "around 6000 rpm" 〔(【引用サイトリンク】url=http://www.honda.com/newsandviews/article.aspx?id=200707112298 )〕 The F20C was designed with high maximum rpm capability in mind, for increased power output; redline is at 8900 rpm, with VTEC engagement at 6000 rpm. Its relatively long stroke of 84mm results in a mean piston speed of 4965 ft/m, or 25 m/s, second highest than any other production car to date.〔http://hondaswap.com/members-lounge/engines-fastest-piston-speeds-72614/〕 It is only beaten by the B7 Audi RS4 (2006-2008). Power output is at 8300 rpm in North America and Europe. The Japanese version, which has a higher compression ratio, is capable of at 8600 rpm. Honda's F20C Engine won a spot on Wards' ''10 Best Engines List'' four times, in 2000, 2001, 2002 and 2003. The engine displaces , lending to the Honda S2000's name. This method of naming follows suit with the rest of the Honda S roadsters (i.e. Honda S500, S600, and S800). Applications: * 1999-2005 Honda S2000 (Japan) * 2000-2003 Honda S2000 (North America) * 1999–2009 Honda S2000 (United Kingdom, Europe, Australia) The F20C produces the highest specific output for any naturally aspirated 2.0L piston engine in a car priced under US$100,000, at per liter, ahead of the SR16VE N1 found in the homologation version of JDM Nissan Pulsar producing for a specific power of per liter. The F20C held the record for producing the highest specific power output for any mass production naturally aspirated piston engine. 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「Honda F20C engine」の詳細全文を読む スポンサード リンク
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