Subaru FB engine

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The Subaru FB engine is the third-generation and currently 4-boxer gasoline engine used in Subaru cars, and announced on September 23, 2010. It follows the previous generation EJ-series engine introduced in 1989 and generations The first EA-series was introduced in 1966. By increasing the piston stroke and reducing the piston hole, Subaru aims to reduce emissions and improve fuel economy, while increasing and expanding the torque output compared to the EJ series.

Video Subaru FB engine

Overview

FB has all new block and heads featuring dual overhead cams with intake and variable valve timing exhaust (which Subaru designates as AVCS, stands for Active Valve Control System), and timing chain that replaces the timing belt. Moving to chain-driven cams is said to allow the valves to be placed at a much narrower angle to each other and shrink the cylinder holes from 99.5 mm to 94. This results in less fuel burning during cold start, thus reducing emissions. Subaru is able to maintain its exterior dimensions substantially unchanged by using an asymmetric linking rod as in the EZ36 engine. FB is only slightly heavier than an EJ equivalent-displacement. In January 2011, Car and Driver were notified of direct injection will be added immediately.

Subaru claims a 28 percent reduction in friction losses, mainly due to lighter pistons and connecting rods. The compact oil pump is also credited with the contribution of friction reduction losses. FB has a 10% increase in fuel economy with its coming power faster and torsion bands becoming more widespread.

The compression ratio is slightly higher, and stroke has increased compared to the EJ engine; previously, the casing was blocking longer strokes. This change improves the combustion efficiency and allows higher torque at lower speeds. The FB was built at Gunma Oizumi Plant and was initially available as a 2.5-liter displacement engine, starting with the Forester model, with a 2.0-liter model to follow the Imprezas. 0W-20 oil is used to help fuel economy, and about 1 liter more oil is used as newly adopted time chains require oil supply.

Maps Subaru FB engine

FB16

FB16

• Displacement: 1.597 cc DOHC
• Bore: 78.8 mm
• Stroke: 82 mm
• Compression: 11.0: 1
• Power: 84 kW (114 PS; 113 hp) at 5,600 rpm
• Torque: 150Ã, N? m (15Ã, kg? m; 111Ã, lb? ft) at 4.000Ã, rpm
• Applications: 2012 EUDM Subaru Impreza XV 1.6i

FB16 DIT

FB16 DIT is the first FB-turbocharged engine series, and includes direct injection with auto stop/start system. This is the base engine on the 2014 model Subaru Levorg. The Levorg also has the option of a 2.0-liter direct-injection turbo engine, the FA20F.

• Moving: 1.599Ã, cc
• Bore: 78.8 mm
• Stroke: 82 mm
• Compression: 11: 1
• Application: 2014 Subaru Levorg
  • Power: 170 PS (125 kW; 168 hp) at 4,800-5,600 RPM
  • Torque: 25.5 kg? m (250Ã, N? m; 184Ã, lb? ft) at 1,800-4,800Ã, RPM

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FB20

The previous EJ20 used oversquare 92 mm (mm 3.0 mm) and stroke for 1,994 cm ³ (121.7 Â ° cuÃ, in) sweep removal; For comparison, the FB20 has a bottom hole and a thickness of 84 mm (3.3 inches 3.5 inches) and a slightly larger 1,995 cm ³ (121.7 Â ° cu) displacement.

FB20B

• Moving: 1.995Ã, cc DOHC
• Bore: 84 mm
• Stroke: 90 mm
• Compression: 10.5: 1
• 2011 JDM Subaru Forester:
  • Power: 109 kW (148 PS, 146 hp) at 6,000 rpm
  • Torque: 196Ã, N? m (20Ã, kg? m; 145Ã, lb? ft) at 4,200Ã, rpm
• Subaru Impreza 2012-2016 USDM and Subaru XV 2012-2017:
  • Power: 148 hp (150 PS; 110 kW) at 6,200 rpm
  • Torque: 145Ã, lb? ft (197Ã, N? m; 20Ã, kg? m) at 4,200Ã, rpm

FB20D

Used in fifth-generation sedans and Impreza hatchbacks.

• Bore: 84 mm
• Stroke: 90 mm
• Compression: 12.5: 1
• 2016 Subaru Impreza and 2018 Subaru XV
  • Power: 152 hp (154 PS, 113 kW), crashing 156 PS (154 hp; 115 kW) at 6,000 RPM
  • Torque: 20.0Ã, kg? m (196Ã, n? m; 145Ã, lb? ft) at 4.000Ã, RPM

FB20X

• Moving: 1.995Ã, cc DOHC
• Bore: 84 mm
• Stroke: 90 mm
• Compression: 10.5: 1
• Applications: 2014 Subaru XV Hybrid
  • Power: 160 hp (162 PS, 119 kW) at 6,000 rpm
  • Torque: 163Ã, lb? ft (221Ã, N? m; 23Ã, kg? m) at 2,000 rpm

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FB25

Compared with the previous EJ25, which had a displacement of 2,457 cm ³ (149.9 cuÃ, in) of a 99.5 mm hole ÃÆ'â € "79 mm (3.92 in 3.11 inches) and stroke , FB25 has a slightly larger displacement of 2,498 cm ³ (152.4 cuÃ, in) on bore and stroke 94 mm-90 mm (3.7 in 3.5 inches).

FB25B

• Moving: 2.498Ã, cc DOHC
• Bore: 94 mm
• Stroke: 90 mm
• Compression: 10.0: 1
• Power: 170 hp (172 PS; 127 kW) at 5,800 rpm
• Torque: 174Ã, lb? ft (236Ã, N? m; 24Ã, kg? m) at 4,100Ã, rpm
• Application:
  • 2011 Subaru Forester North America
  • 2012 Subaru Legacy North America

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References

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External links

(Bahasa Jepang: Mesin Subaru FB )

• Tanigawa, Kiyoshi (29 September 2010). "??????????????? FB ?????" [Subaru generasi baru "konferensi pers" seri FB]. Jam Mobil . Diperoleh 28 Februari 2018 .
• "Teknologi: Kinerja - The Subaru Boxer Engine". Subaru Global . Diperoleh 28 Februari 2018 .
• "Apa Perbedaan Antara Mesin Subaru?". Subaru dari Australia . Diperoleh 28 Februari 2018 .

Source of the article : Wikipedia