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The Subaru FB engine is the third generation of gasoline boxer-4 engine used in Subaru automobiles, and was announced on 23 September 2010. [1] It follows the previous generation EJ-series engine which was introduced in 1989 and the first generation EA-series which was introduced in 1966.
For the first time in a Subaru engine, the centerlines of the cylinder bores do not intersect with the crankshaft axis to reduce friction during the piston downstroke; instead, there is a crank offset of 8 mm (0.31 in). Overall thermal efficiency is 40% due to the adoption of lean-burn combustion with an excess air ratio (λ) of 2. [32]
Subaru Alcyone VX. Created as a refined luxury engine with improved power over the EA82T, Subaru introduced the ER27 engine in November 1985 for the Subaru ACX-II concept car, shown at the Tokyo Motor Show and billed as the 'concept car of the near future.' [2] The concept went into production as the Subaru Alcyone VX (Subaru XT6 in North America) in August 1987, [3] the exclusive application ...
The Subaru EJ engine is a series of four-stroke automotive engines manufactured by Subaru. They were introduced in 1989, intended to succeed the previous Subaru EA engine . The EJ series was the mainstay of Subaru's engine line, with all engines of this series being 16-valve horizontal flat-fours , with configurations available for single, or ...
The Subaru FA engine is a gasoline boxer-4 engine used in Subaru and Toyota automobiles. It is a derivative of the FB engine , with efforts to reduce weight while maintaining durability as the main design goals.
For the first time in a Subaru engine, the centerlines of the cylinder bores do not intersect with the crankshaft axis; instead, there is a crank offset of 8 mm (0.31 in). This offset reduces friction during the piston downstroke. Overall thermal efficiency is 40% due to the adoption of lean-burn combustion with an excess air ratio (λ) of 2. [5]
The Intelligence-Active Valve Lift System (i-AVLS) is a valvetrain technology implemented by Subaru in their 2.5 L SOHC naturally aspirated engine to improve emissions, efficiency and performance. Note that AVLS is different from AVCS used on other Subaru engines.
In Subaru's home market of Japan, the Impreza range started with the 1.5i—powered by the 1.5-liter EJ15 SOHC engine and paired with a manual transmission or optional automatic. Subaru fitted a DOHC version of the same engine to the automatic-only 1.5R, which also featured an active valve control system. For both models, front- and all-wheel ...