BMW N45#N45B16
{{Infobox automobile engine
|name =BMW N45 engine
|production =2004-2011
|configuration =Inline-4
|head =Aluminium
|block =Aluminium
|fueltype =Petrol
|displacement = {{convert|1596|cc|L|1|order=flip|abbr=on}}
{{convert|1997|cc|L|1|order=flip|abbr=on}}
| bore = {{convert|84|mm|in|2|abbr=on}}
{{convert|85|mm|in|2|abbr=on}}
| stroke = {{convert|72|mm|in|2|abbr=on}}
{{convert|88|mm|in|2|abbr=on}}
|predecessor =BMW N40
|successor =BMW N43
}}
The BMW N45 is a naturally aspirated four-cylinder petrol engine which replaced the BMW N40 and was produced from 2004-2011.{{cite web|url=http://www.bmwheaven.com/database/engine.php?type=N45 |title=Engine specifications for N45 engines |website=www.bmwheaven.com |date= |accessdate=3 June 2012}} It was produced alongside the BMW N46 engine and only sold in some countries, where vehicle taxes favoured small-displacement engines.
The N45 is based on the N46, however it does not have balance shafts or Valvetronic (variable valve lift).{{cite web|url=http://paultan.org/2009/01/08/bmw-116i-now-powered-by-20l-n46-valvetronic/ |title=BMW 116i now powered by 2.0L N46 Valvetronic |website=www.paultan.org |date= |accessdate=3 June 2012}} As per the N42 and N46, the N45 has double-VANOS (variable valve timing). In 2007, the N45 was updated, which was called the N45N.
In 2007, the N45's successor - the BMW N43 - was introduced. However, the direct-injected N43 was not sold in countries with high-sulfur fuel, so the N45 continued to be produced alongside the N43. The N45 was phased out as new generation vehicles were released with the turbocharged BMW N13 four-cylinder engine.
Models
| class="wikitable sortable" style="text-align: center;" | ||||
| Engine | Displacement | Power | Torque | Years |
|---|---|---|---|---|
| N45B16 | {{convert|1596|cc|cuin|1|abbr=on}} | {{convert|85|kW|bhp|0|abbr=on}} at 6,000 rpm | {{convert|150|Nm|lbft|0|abbr=on}} at 4,300 rpm | 2004-2011 |
| N45B20S | {{convert|1997|cc|cuin|1|abbr=on}} | {{convert|130|kW|bhp|0|abbr=on}} at 7,000 rpm | {{convert|210|Nm|lbft|0|abbr=on}} at 4,250 rpm | 2006 |
=N45B16=
=N45B20S=
The N45 was enlarged to {{convert|1997|cc|cuin|1|abbr=on}}, to homologate the E90 320si for the World Touring Car Championship.{{cite web|title=BMW 320si – A real driver's car|url=http://www.bmwblog.com/2009/10/28/bmw-320si-a-real-drivers-car/|website=www.bmwblog.com|date=28 October 2009 |accessdate=14 April 2017}} The N45 was chosen over the N46, because its lack of variable valve lift allows higher engine speeds. Instead, the engine used dual overhead camshafts and 16 valves. The main visual difference is the carbon fiber valve cover.
Applications:
- 2006 E90 320si (Limited production model)
See also
References
{{reflist|30em}}
{{BMW automotive petrol engines: 2000s to 2010s}}
{{DEFAULTSORT:Bmw N45}}