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A flat-four engine, also known as a horizontally opposed-four engine or boxer engine, [1] is a four-cylinder piston engine with two banks of cylinders lying on opposite sides of a common crankshaft. The most common type of flat-four engine is the boxer-four engine , each pair of opposed pistons moves inwards and outwards at the same time.
The FB16 direct injection turbocharged (DIT) engine is the first FB-series engine with a turbocharger, and includes direct injection with an auto stop/start system. It is the base engine in the first-generation (2014–20 model years) Subaru Levorg. The Levorg also has an option for a 2.0 litre direct injection turbo engine, the FA20F.
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. There are two distinct families/variations of the aircooled engine namely Type 1 and Type 4.
In addition, an oil cooler has been added to the engine. [21] One important difference is that the 2022 Toyota GR86 engine requires an oil that meets the ILSAC GF-5 standard while the 2023 GR86 engine requires ILSAC GF-6A, while in markets like Australia the 2022 Subaru BRZ still allows ILSAC GF-5 and additionally allows older ACEA A3 and A5 ...
The wasserboxer features a cast aluminium alloy cylinder block, cylinder heads, and pistons; and a die-forged steel flat plane crankshaft with four main bearings. [1]As in Volkswagen's earlier air-cooled luftboxer engines, the wasserboxer's three-bearing camshaft is driven directly from the crankshaft by means of a small steel gear on the crankshaft and a larger aluminium gear on the camshaft ...
The company also produced boxer-six engines from 1988 to 1996 and 2001–2019. [16] In 2008, the Subaru EE engine became the world's first passenger car diesel boxer engine. This engine is a turbocharged boxer-four with common rail fuel injection. [4] [17] [18] [19] Ferrari used flat-twelve engines for various Formula One cars in the 1970s.
All Subaru EJ engines have a 1-3-2-4 firing order, which, given the longer exhaust runners on cylinders 2 and 4 causes the characteristic "subaru boxer rumble". Some of the 2005 and later Subaru vehicle Engines (especially the turbo charged engines) are using CAN bus as their sole Vehicle/Vessel speed input channel.
The engine was stroked up to 64 mm (2.52 in) to create the 1.3 L (1,286 cc) version. This engine produced 68–75 PS (50–55 kW). [3] A version of this engine (engine type 901.U0) was fitted with a catalytic converter, air injection, and evaporative emissions controls and received Californian emissions certification in 1976. [8]