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The Daihatsu A-series engine is a range of compact two-cylinder, internal combustion piston engines, designed by Daihatsu with the aid of their owner Toyota. The petrol-driven series has cast iron engine blocks and aluminum cylinder heads, and are of an SOHC lean burn design, with belt driven heads. The head design was called "TGP lean-burn", for "Turbulence Generating Pot". The engine also had twin-balancing shaft, which provided smoothness equivalent to that of a traditional four-cylinder engine - although it also cost nearly as much to build. The engine was developed with some haste in order to replace the dirty two-stroke "ZM" engines used in Daihatsu's earlier Kei cars, and was the first unit to take full advantage of the new 550 cc displacement limit in effect from 1 January 1976. It was first presented in May 1976, as the AB10.〔Baobab Street, ''Enjoy'', p. 130〕 Eventually, even a turbocharged version was produced.〔Baobab Street, ''Enjoy'', p. 133〕 The engine was replaced by the three-cylinder EB-series in 1985. ==AB-series (547 cc)== The AB-series is a version originally installed into the 1976 Fellow Max 550 but soon found its way into Daihatsu's entire Kei car lineup. Bore is 71.6 mm and stroke is 68 mm. Unlike the export versions, the Japanese market engines have a small catalyzer fitted. The engine (AB20) was also installed in the tiny Portuguese Entreposto Sado 550 citycar, of which about 500 were built in the early eighties. Surprisingly, Daihatsu's close competitor Suzuki fitted AB10 engines into their Suzuki Fronte 7-S for a short period, as their own two-stroke engines had a hard time meeting ever stricter emissions requirements. AB10 is the code used for engines meant to be installed in an upright position, while those intended for a horizontal position (for underfloor usage) are called AB20. The AB55 is a horizontal version equipped with a turbocharger. A downtuned version with at 2900 rpm and at 2000 rpm was installed in Toyota's FG5 forklift from the late seventies. Applications: * 1976.05–1977.06 Daihatsu Fellow Max 550 (L40/L40V) * 1977.06–1980.06 Daihatsu Max Cuore/Cuore (L45/L40V) * 1980.06–1985.08 Daihatsu Cuore/Mira (L55/L55V) * 1976.04–1980.04 Daihatsu Hijet (S40) * 1977.04–1981.04 Daihatsu Hijet (S60) * 1982–1984 Sado 550 (Portugal) * 1977.06–1978 Suzuki Fronte 7-S (SS11) 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「Daihatsu A-series engine」の詳細全文を読む スポンサード リンク
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