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A boxer-style flat-six engine is able to have perfect primary and secondary balance.As in other six-cylinder engines, the overlapping of the power strokes of the different cylinders (with a firing interval of 120 degrees in a four-stroke engine) reduces the pulsating of the power delivery relative to that of similar engines with fewer cylinders.
Unlike prior Subaru flat-6 designs, the EZ30 has a significantly smaller bore pitch (the distance between adjacent cylinder centerlines on each bank of the engine block) than the contemporary flat-4 EJ-series. The bore pitch of the EZ30 is 98.4 mm (3.87 in), [36] compared to a bore pitch of 113 mm (4.4 in) in the EJ series.
[5] [6] The most common design of flat engine for motorcycles is the boxer-twin, beginning with the 1905 Fée flat-twin engine, manufactured by the Light Motors Company, which was the first production motorcycle engine. [7] BMW Motorrad have a long history of boxer-twin motorcycles, beginning in 1923 with the BMW R32 [5]
The Porsche flat-six engine series is a line of mechanically similar, naturally aspirated and sometimes turbocharged, flat-six boxer engines, produced by Porsche for almost 60 consecutive years, since 1963. [8] [9] The engine is an evolution of the flat-four boxer used in the original Volkswagen Beetle. [10] [11] [12
Subaru unveiled the world's first boxer diesel engine to be fitted in a passenger car at the Geneva Auto Show in 2007. [3] This 2.0L DOHC engine, designated the EE20, [ 4 ] has an output of 110 kW (150 PS; 150 hp) at 3600 rpm and develops 350 N⋅m (36 kg⋅m; 260 lb⋅ft) of torque at 1800 rpm, [ 5 ] [ 6 ] with a redline of 4750 rpm. [ 7 ]
Douglas flat-twin motorcycle engine. Flat engines (also known as "horizontally-opposed" engines) have the cylinders arranged in two banks on either side of a single crankshaft. Boxer engines are a subtype of flat engines where opposing pistons move in and out in tandem. Types of flat engines include: Flat-2, commonly called "flat-twin" Flat-4 ...
Vehicle Type Type MY Engine numbers Technical data Cayenne S M48.00 03 3 813 00501>60000 8 Cyl/4,5L /250 KW Cayenne Turbo M48.50 03 3 823 00501>60000 8 Cyl/4,5L /331 KW Cayenne M02.2Y 04 4 BFD 00501>60000 6 Cyl/3,2L /184 KW Cayenne S M48.00 04 4 814 00501>60000 8 Cyl/4,5L /250 KW Cayenne Turbo M48.50 04 4 824 00501>60000 8 Cyl/4,5L /331 KW ...
The Volkswagen air-cooled engine is an air-cooled, gasoline-fuelled, boxer engine with four horizontally opposed cast-iron cylinders, cast aluminum alloy cylinder heads and pistons, magnesium-alloy crankcase, and forged steel crankshaft and connecting rods.