Volvo B8444S engine

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Volvo B8444S
2006 Volvo XC90 V8 engine.jpg
B8444S installed in a 2006 Volvo XC90
Overview
Manufacturer Volvo Cars (design)
Yamaha (manufacturing)
Production2005–2010
Layout
Configuration 60° V8
Displacement 4.4–5.0 L; 269.4–305.1 cu in (4,414–5,000 cc)
Cylinder bore 94 mm (3.70 in)
Piston stroke 79.5 mm (3.13 in)
Cylinder block materialAluminium
Cylinder head materialAluminium
Valvetrain DOHC 4 valves / cyl.
Compression ratio 9.6:1, 10.4:1, [1] 12.0:1
Combustion
Turbocharger Twin-turbo (on Noble M600)
Fuel system Port fuel injection [2]
Fuel type Petrol
Cooling system Water-cooled
Output
Power output 232 kW (315 PS; 311 hp)
478 kW (650 PS; 641 hp) [1]
485 kW (659 PS; 650 hp) (V8 Supercar engine) [3]
Torque output 440 N⋅m (325 lb⋅ft) [1]
819 N⋅m (604 lbf⋅ft) [4]
660 N⋅m (487 lbf⋅ft) (V8 Supercar engine)
Dimensions
Length754 mm (29.7 in)
Width635 mm (25.0 in)
Dry weight 190 kg (420 lb)
Chronology
Predecessor Volvo V8

The B8444S is an automobile V8 engine manufactured by Yamaha Motor Corporation [5] for Volvo Cars. It was built in Japan and based on Volvo designs.

Contents

Usage

Volvo began offering a 4.4 L (4,414 cc) V8 engine in its large P2 platform automobiles in 2005. [6] [7] It was initially offered only for the Volvo XC90 [6] [7] but later found its way in the second generation Volvo S80, [5] and was mated to a six speed Aisin Seiki AWTF80-SC transmission of Japan also with a Swedish Haldex all-wheel drive (AWD) system. The 4.4 L V8 Volvo engine was built by Yamaha in Japan under Volvo design and specifications.

Although the B8444S shares its Yamaha origination, its transverse layout, and its 60 degree bank angle, officials of all three companies involved insist that the Volvo V8 is not related to the SHO engine; the die-cast open-deck aluminum Volvo block is clearly different from the sand-cast closed-deck aluminum SHO engine block although the two engines share many common dimensions including bore centers, stroke, bearing journal diameters, and deck height.

As revealed in BBC's Top Gear show (Series 14 Episode 5) this basic engine is also used in the Noble M600, albeit longitudinally mounted, developing some 650 PS (478 kW; 641 hp) with the addition of Garrett AiResearch twin-turbochargers. The engine also features a MoTeC M190 and Injector Dynamics ID725 electronic fuel injection. The Noble unit is custom built by a 3rd party firm expressly for Noble Cars UK.

Volvo discontinued the engine subsequent to its change in ownership and management in August, 2010. The new management intends to offer a single engine across all Volvo models, ultimately a four cylinder, [8] and at that point Volvo Cars was owned by Ford.

Applications:

Specification

As a Volvo V8, this new engine uses the similar Volvo engine naming system. The engine is called the Volvo B8444S. B being for bensin (gasoline), 8 for the number of cylinders, 4.4 for the total displacement of the engine, the last 4 for the number of valves per cylinder and S for suction, meaning it's naturally aspirated. This engine also uses original Volvo parts.

The engine is a 4.4 L (4,414 cc) aluminum DOHC V8 which produces 315 PS (232 kW; 311 hp) and 440 N⋅m (325 lb⋅ft). It has a 60 degree cylinder bank. The engine block and heads are cast from aluminium reducing its weight to a comparatively light 418 lb (190 kg).

To retain its 90 degree firing interval with its 60 degree bank angle and cross plane crankshaft the b8444s utilised offset crank journals.

Originally debuted in the Volvo XC90, which previously used 5- or 6-cylinder transverse inline engines, the B8444S had a number of significant packaging challenges to overcome. To save space and enable transverse orientation, the alternator is mounted directly to the engine block without brackets, The exhaust camshafts are linked to the intake camshafts with smaller secondary chains, and the left-hand cylinder bank is offset from its counterpart by half a cylinder's width. These tactics resulted in what was, at the time, the most compact V8 for its given 4.4 L displacement. [7]

The B8444S also made strides in emissions standards as the first V8 engine to meet the Ultra-low-emission vehicle (ULEV II) standard. The emissions standards were met using a combination of four catalytic converters and continuous variable valve timing. [7]

[[

Volvo V8 badge V8 badge of Volvo XC90.jpg
Volvo V8 badge

|thumb|Volvo V8 badge on a XC90]]

Motorsport

A 5.0 L version was developed for use in Volvo S60s by Garry Rogers Motorsport in the V8 Supercars series between 2014 and 2016. [9]

Marine

The engine block is also used for the Yamaha F300V8, F350V8, and XTO Offshore outboards. The displacement ranges from 5.3 to 5.6 litres.

This displacement increase was achieved by increasing the stroke to 96 mm (3.78 in). The heads are also modified to “reverse flow” types where the inlet ports are on the outside of the engine, and the exhaust ports exit in towards the Vee of the engine. This allows a single exhaust exit path from the center of the engine which aids packaging the unit into an outboard form factor. The compression ratio was also dropped to 9.6:1. Whilst not ideal from an efficiency standpoint, it does reduce heat and stress on the engine which increases durability; an essential attribute for marine duty. It also allows 87 octane rated fuels to be used.

The latest development of this outboard is called the ”XTO Offshore” and is rated at 425 hp (317 kW; 431 PS). It has an increased displacement of 5.6-litres achieved by increasing the bore diameter from 94 to 96 mm (3.70 to 3.78 in). The stroke remains the same, however the compression ratio is now 12.0:1. It also utilizes a gasoline direct injection system, a first for a 4-stroke outboard engine, and it requires 89 Octane rated fuel.

Related Research Articles

Yamaha Motor Co., Ltd. is a Japanese mobility manufacturer that produces motorcycles, motorboats, outboard motors, and other motorized products. The company was established in the year 1955 upon separation from Nippon Gakki Co., Ltd. and is headquartered in Iwata, Shizuoka, Japan. The company conducts development, production and marketing operations through 109 consolidated subsidiaries as of 2012.

<span class="mw-page-title-main">Volvo Cars</span> Swedish multinational manufacturer of luxury vehicles

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The Volvo S60 is a compact executive car manufactured and marketed by Volvo since 2000.

<span class="mw-page-title-main">Volvo S80</span> Swedish executive sedan

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<span class="mw-page-title-main">Volvo XC90</span> Swedish mid-size luxury crossover SUV

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<span class="mw-page-title-main">Balance shaft</span> Weights used to balance otherwise unbalanced engine movement

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<span class="mw-page-title-main">Transverse engine</span> Vehicle engine whose crankshaft axis is perpendicular to the direction of travel

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<span class="mw-page-title-main">Noble M600</span> Motor vehicle

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References

  1. 1 2 3 "2008 Volvo S80 specifications". www.media.volvocars.com. Volvo Car Corporation. 2007. Archived from the original on 2016-03-04. Retrieved 2017-08-17.
  2. ↑ "Volvo XC90 V-8". Car and Driver. 2004-11-01.
  3. ↑ "Volvo reveals V8 Supercars engine". 11 February 2014.
  4. ↑ "Noble Reveals M600 with 650-hp, Twin-Turbo 4.4-Liter V8". 27 January 2011.
  5. 1 2 Jonathan Elfalan (11 May 2007). "2007 Volvo S80 V8 AWD". www.roadandtrack.com. Retrieved 2017-08-17.
  6. 1 2 Frank Wald (15 March 2005). "Volvo XC90 V8: Fauchendes Kraftpaket" [Volvo XC90 V8: Hissing powerhouse]. Der Spiegel (in German). Retrieved 2017-08-17.
  7. 1 2 3 4 Volvo Car Corporation (10 January 2005). "Volvo XC90 gets the state-of-the-art V8 powertrain". www.media.volvocars.com. Retrieved 2017-08-17.
  8. ↑ Evans, Scott (18 March 2009). "Volvo to Switch to Only Four-Cylinder Engines". Motor Trend.
  9. ↑ Daniel DeGasperi (17 June 2013). "Volvo announces V8 Supercars program, using Yamaha V8". www.caradvice.com.au. Retrieved 2013-06-17.
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