BMW S65

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S65B40 in the M3 Coupé (E92)

The S65 is a high-speed , naturally aspirated V8 engine with overhead camshafts and 32 valves from BMW . It shares the basic architecture and the aluminum construction with the S85 V10 from the M5 / M6 . It was introduced in the E92 M3 as the successor to the S54 straight-six . The engine won the "3 to 4 liter displacement" category at the International Engine of the Year Awards five years in a row. With a maximum speed of 8,400 revolutions per minute, the S65 is the highest-revving series engine that BMW has ever built.

development

The S65B40 was developed to meet the increasingly stringent Euro V and CARB emission standards . Because the development potential of the predecessor S54 was exhausted, its successor, the S65, was developed.

It shares the same bore of 92 mm and the same stroke of 75.2 mm with the S85 , as does the double VANOS and the compression ratio of 12.0: 1. In contrast to the S85 , the VANOS system in the S65 is driven by the oil pressure of the engine, which makes a separate high-pressure hydraulic system , as installed in the S85 , superfluous.

The engine block , which consists of a eutectic aluminum - silicon alloy, comes from BMW's Formula 1 foundry in Landshut , while the hydroaluminum cylinder heads are produced in Austria. Other notable features are iron-clad aluminum pistons, knock control with ion current , steel-magnesium connecting rods, a crankshaft forged from steel ( crossplane design) and a single throttle valve intake system in which one cylinder bank is always controlled by an electromechanical actuator.

For the S65, a newer version MS S65 was developed from the engine control unit of the S85 . It can perform more than 200 million calculations per second compared to 25 million with the predecessor BMW S54 .

The resulting engine weighs 202 kg, 15 kg less than its predecessor with only 6 cylinders.

Data

Demonstration model of a BMW S65
Engine type Displacement Bore × stroke compression Power at 1 / min Torque at 1 / min Maximum speed year
S65B40 4.0 L (3999 cm 3 ) 92.0 mm x 75.2 mm 12.0: 1 309 kW (420 hp) at 8300 400 Nm at 3900 8400 min -1 2007-2013

use

Web links

Commons : BMW S65  - collection of pictures, videos and audio files

Individual evidence

  1. ↑ a b 2007 BMW E92 M3 . Zerotohundred.com. March 29, 2007. Retrieved April 29, 2007.
  2. ^ The new BMW M3 . BMW USA. April 1, 2007. Archived from the original on October 6, 2007. Info: The archive link was automatically inserted and has not yet been checked. Please check the original and archive link according to the instructions and then remove this notice. Retrieved April 29, 2007. @1@ 2Template: Webachiv / IABot / www.bmwusa.com
  3. ↑ V8 engine from the M3 soon also in the Wiesmann GT . October 29, 2009. Retrieved November 12, 2010.
Timeline of BMW gasoline engines for passenger cars since 1961
Number of cylinders Conception 1960s 1970s 1980s 1990s 2000s 2010s
0 1 2 3 4th 5 6th 7th 8th 9 0 1 2 3 4th 5 6th 7th 8th 9 0 1 2 3 4th 5 6th 7th 8th 9 0 1 2 3 4th 5 6th 7th 8th 9 0 1 2 3 4th 5 6th 7th 8th 9 0 1 2 3 4th 5 6th 7th 8th
3 1.5 l B38
4th (1.5–2.0 l) M10
M40
M42
M43
M44
N40
N42
N45
N46
N43
N13
N20
B48
High performance motor S14
6th Small six-cylinder (2.0-3.0 l) M20
M50
M52
M54
Large six-cylinder (2.5-3.5 l) M30
N52
N53
N54
N55
B58
High performance motor M88
S38
S50
S52
S54
S55
8th 3.0-4.4 l M60
M62
N62
N63
High performance motor S62
S63
S65
10 High performance motor S85
12 5.0-6.6 l M70
M73
N73
N74
High performance motor S70
Number of cylinders Conception 0 1 2 3 4th 5 6th 7th 8th 9 0 1 2 3 4th 5 6th 7th 8th 9 0 1 2 3 4th 5 6th 7th 8th 9 0 1 2 3 4th 5 6th 7th 8th 9 0 1 2 3 4th 5 6th 7th 8th 9 0 1 2 3 4th 5 6th 7th 8th
1960s 1970s 1980s 1990s 2000s 2010s