Mercedes-Benz M 271

Mercedes Benz
M 271
Manufacturer:	Mercedes Benz
Production period:	2002 to 2015
Design:	Inline four-cylinder
Engines:	1.6 liters (1597 cm³) 1.8 liters (1796 cm³)
Previous model:	M 111
Successor:	M 274

The M 271 is a four- cylinder in-line petrol engine from Mercedes-Benz , which was introduced in 2002 as the successor to the M 111 .

It is manufactured in the Mercedes-Benz plant in Stuttgart-Untertürkheim . The engine has been offered in various Mercedes car models since 2002. It all started with the C-Class 203 series . It is now also offered in the SLK , CLK and the E-Class . It is also used in the Sprinter (W 906) .

technology

M 271

The engine series presented in 2002 showed a noticeable improvement in many properties compared to its predecessor M 111 . These include lower fuel consumption, improved smoothness, improved power and torque characteristics and a stronger focus on lightweight construction. A package of measures called TWINPULSE , consisting of four-valve technology with centrally located spark plugs, variably adjustable camshafts , balancer shafts, adaptive drive dynamics and supercharging with charge air cooling, should enable smooth running and driving pleasure with low fuel consumption at the same time.

The engine weighs 167 kg, that is 18 kg less than the M 111. The weight savings was mm by a cylinder distance of only 90, a die-cast aluminum engine block with cast-in cast iron - cylinder liners and made of a high strength aluminum alloy cylinder head reached.

To improve the running smoothness, the engine has a Lanchester compensation , which eliminates the free inertia forces of the second order. This compensation does not apply to the 1.6-liter variant in order to save friction. The balance shafts are mounted in an aluminum housing that is screwed to the crankcase from below in the oil pan. The counter-rotating balance shafts are driven by a single sleeve chain with low masses. The engine's oil pump is also housed in the crankcase; it is driven by one of the two shafts using a pair of gears.

Two camshafts driven by a single roller chain operate the valves via roller rocker arms. The valves themselves have a maintenance-free hydraulic valve clearance compensation. The phase of the intake and exhaust camshafts can be continuously adjusted independently. For this purpose, a newly developed vane-type adjuster with an integrated control valve enables the most favorable control times to be set continuously, which has a favorable effect on the torque behavior at full load, on fuel consumption and exhaust emissions.

In contrast to their predecessor, all engines in the M-271 series are supercharged using a compressor . Compared to the supercharged M-111 engines, the compressor has been completely redeveloped with the aim of improving air throughput and efficiency. The air gap between the rotors and the charger housing was reduced and the rotors were given a new type of coating. To reduce noise emissions, broadband noise dampers were installed on both the suction and pressure side. The charge air is brought to the optimum temperature by a charge air cooler .

The motor control is calculated by the Siemens SIM 4 LKE. The adaptive drive dynamics monitors pedal movements and registers acceleration maneuvers. In this way, the system is able to recognize whether the driver has a more comfort-oriented or a sporty driving style and adapts the characteristics of the accelerator pedal and throttle valve.

According to the so-called "downsizing concept", the engine delivers the required power with a small displacement and high boost pressure. This makes the engine smaller and lighter, and at partial load, the smaller displacement means that throttle losses are lower. Although the compression has to be reduced with increasing boost pressure in order to avoid knocking at full load, this disadvantage is compensated for by the better cylinder filling.

Until 2008, all versions had 82 mm bore and 85 mm stroke and thus a displacement of 1796 cm³. From April 2008 to April 2010, the C 180 compressor will be available as the first BlueEFFICIENCY model. This has an M 271 with a displacement reduced to 1.6 liters. For this purpose, the stroke was reduced from 82 mm to 75.6 mm with the same bore. The smaller displacement, in conjunction with the needs-based control of the servo pump, the longer rear axle ratio, tires with low rolling resistance and other fuel-saving measures on the vehicle, such as B. aerodynamic improvements or weight-reduced components for lower fuel consumption.

The engine variant without direct injection can be operated with Super E10 (RON 95).

M 271 with direct injection

Already announced when the M 271 was presented, the market launch of the M 271 with direct injection was postponed to mid-2003 due to technical problems. Initially offered as the C 200 CGI in the ( C-Class ), the M 271 DE 18 ML was also used in the CLK 200 CGI ( C / A209 ).

In this engine, the fuel is injected into the cylinders via an injector at an angle of 42 degrees and at a pressure of 50 to 120 bar (depending on the operating state), where the fuel forms a mixture cloud with the air. This is guided to the spark plugs by specially shaped piston recesses. The CGI engine has two separate intake ducts, one of which is additionally equipped with an adjustable swirl flap. In this way, turbulence is created in the air that is drawn in, which makes the combustion process more efficient. The injection pressure is generated by a high-pressure fuel pump. This is driven by the intake camshaft.

In contrast to the other M-271 motors, the Siemens SIM 4 LDE motor control works here , which has been expanded to include specific functions, such as regulating the pressure in the fuel line. In partial load operation, at a mean pressure of four to five bar, and at low engine speeds, direct injection works using the stratified charge process . The fuel is injected relatively late into the air compressed by the piston. This creates an ignitable mixture in the area of ​​the spark plug, while a lean mixture that is difficult to ignite exists in the rest of the combustion chamber. Outside this range, the direct injection engine is operated with the air-fuel mixture (lambda 1) that is usual for catalytic converter engines. The nitrogen oxides produced in lean operation are filtered by a NO _x storage catalytic converter.

The prescribed fuel type is Super Plus E5 (98 RON); Refueling with Super E10 (RON 95) or Normal E10 (RON 91) is not possible, even in exceptional cases, as the model may not be operated with a bioethanol admixture of more than 5 percent.

During the entire construction period, the direct injection engine was only available with the 6-speed manual transmission . In 2005 the engine was withdrawn from the sales program.

M 271 EVO

M 271 DE 18 AL installed in a C-Class

The exhaust gas turbocharger

After seven years of construction and over a million units of the M 271 series produced, the M 271 EVO (EVO = Evolution) was launched in the E 250 CGI BlueEFFICIENCY in September 2009 . This represents a further development of the well-known supercharged engine with direct injection and replaces the M 271 in some vehicles.

The newly designed variant received an exhaust gas turbocharger instead of the compressor . In addition to the lower production costs, this has the advantage that the motor does not have to generate any additional power to drive the compressor. This improves the efficiency of the engine. In addition, the turbocharger, which is welded to the exhaust manifold, is more compact, weighs around four kilograms less and scores better than the compressor with its better noise and vibration properties. The charger has a wastegate and a recirculation valve to regulate the pressure ratios .

A warm-up control interrupts the coolant flow when the engine is cold, which means that the engine oil warms up more quickly and thus shortens the warm-up phase. The oil pump received a needs-based control.

The direct injection has been further developed and equipped with magnetic multi-hole injectors that inject the fuel at an angle of 30 degrees. The engine now works in the homogeneous air-fuel mixture of 14.6: 1 (lambda = 1) and dispenses with stratified charge.

Until mid-2010, the M-271 EVO engines were only available in conjunction with the automatic 5-speed gearbox . Since then, the 180/200 CGI BlueEFFICIENCY models can also be ordered with the 6-speed manual transmission. The manually operated models have the ECO start / stop function. With this function, the engine is automatically switched off as soon as the vehicle coasts to a traffic light, as soon as the vehicle rolls slower than 8 km / h, the brake is applied and idling is engaged. If the driver presses the accelerator pedal or the clutch pedal, the engine starts automatically immediately. In mid-2011 the 5-speed automatic was replaced by a 7-speed automatic (designation 7G-TRONIC), which has also been equipped with a start-stop function since September 2011 (designation 7G-TRONIC-PLUS).

variants

M 271

Sales description	Engine type *	Model	Power at (1 / min)	Torque at (1 / min)	construction time
Displacement: 1.6 L 1597 cm³, bore × stroke: 82 × 75.6 mm
Port injection, supercharging
CLC 160 BlueEFFICIENCY ( CL 203 )	M 271 E 16 ML	271.911	95 kW (129 hp) at 5000	220 Nm at 2500-3800	2009-2011
C 180 Compressor BlueEFFICIENCY ( W / S 204 )	M 271 E 16 ML	271.910	115 kW (156 hp) at 5200	230 Nm at 3000-4500	2008-2010
Displacement: 1.8 L 1796 cm³, bore × stroke: 82 × 85 mm
Port injection, supercharging
C 160 ( CL 203 )	M 271 E 18 ML red.	271.921	90 kW (122 hp) at 5200	190 Nm at 1500–4200	2005-2006
C 180 compressor ( W / S / CL 203 )	M 271 E 18 ML red.	271,946	105 kW (143 hp) at 5200	220 Nm at 2500-4200	2002-2008
CLC 180 compressor ( CL 203 )	M 271 E 18 ML red.	271,946	105 kW (143 hp) at 5200	220 Nm at 2500-4200	2008-2011
C 180 compressor ( W / S 204 )	M 271 E 18 ML red.	271,952	115 kW (156 hp) at 5200	230 Nm at 2600-4600	2007-2008
Sprinter 216, 316, 516 ( W 906 )	M 271 E 18 ML	271,951	115 kW (156 hp) at 5000	240 Nm at 3000-4000	since 2008
Sprinter 316 NGT, 516 NGT ( W 906 )	M 271 E 18 ML NGT	271,951 NGT	115 kW (156 hp) at 5000	240 Nm at 3000-4000	since 2008 (bivalent natural gas drive)
C 200 compressor ( W / S / CL 203 )	M 271 E 18 ML	271.940	120 kW (163 hp) at 5500	240 Nm at 3000-4000	2002-2008
CLK 200 compressor ( C / A 209 )	M 271 E 18 ML	271.940	120 kW (163 hp) at 5500	240 Nm at 3000-4000	2004-2007
SLK 200 compressor ( R 171 )	M 271 E 18 ML	271,944	120 kW (163 hp) at 5500	240 Nm at 3000-4000	2004-2008
E 200 compressor ( W / S 211 )	M 271 E 18 ML	271.941	120 kW (163 hp) at 5500	240 Nm at 3000-4000	2002-2006
E 200 NGT ( W 211 )	M 271 E 18 ML NGT	271,941 NGT	120 kW (163 hp) at 5500	240 Nm at 3000-4000	2007-2006 (bivalent natural gas drive)
C 200 compressor ( W / S 204 )	M 271 E 18 ML	271,950	135 kW (184 hp) at 5500	250 Nm at 2800-5000	2007-2010
CLC 200 compressor ( CL 203 )	M 271 E 18 ML	271.955	135 kW (184 hp) at 5500	250 Nm at 2800-5000	2008-2011
CLK 200 compressor ( C / A 209 )	M 271 E 18 ML	271.955	135 kW (184 hp) at 5500	250 Nm at 2800-5000	2007-2010
SLK 200 compressor ( R 171 )	M 271 E 18 ML	271,954	135 kW (184 hp) at 5500	250 Nm at 2800-5000	2008-2011
E 200 compressor ( W / S 211 )	M 271 E 18 ML	271,956	135 kW (184 hp) at 5500	250 Nm at 2800-5000	2006-2009
E 200 NGT BlueEFFICIENCY ( W 211 )	M 271 E 18 ML NGT	271,956 NGT	120 kW (163 hp) at 5500	240 Nm at 3000-4000	2006–2009 (bivalent natural gas drive)
C 230 compressor ( W / S / CL 203 )	M 271 E 18 ML / 1	271,948	141 kW (192 hp) at 5800	260 Nm at 3500-4000	2002-2005
E 200 NGT BlueEFFICIENCY ( W 212 )	M 271 E 18 ML NGT	271,958 NGT	120 kW (163 hp) at 5500	240 Nm at 3000-4000	2011-2013 (bivalent natural gas drive)
Direct injection, compressor charging
C 200 CGI ( W / S / CL 203 )	M 271 DE 18 ML	271,942	125 kW (170 hp) at 5500	250 Nm at 3500	2003-2005
CLK 200 CGI ( C / A 209 )	M 271 DE 18 ML	271,942	125 kW (170 hp) at 5500	250 Nm at 3500	2003-2005

M 271 EVO

Sales description	Engine type *	Model	Power at (1 / min)	Torque at (1 / min)	construction time
Displacement: 1.8 L 1796 cm³, bore × stroke: 82 × 85 mm
Direct injection, exhaust gas turbocharger
C 180 BlueEFFICIENCY ( W / S / C 204 )	M 271 DE 18 AL red.	271,820	115 kW (156 hp) at 5000	250 Nm at 1600–4200	2009–2012
C 200 BlueEFFICIENCY ( W / S / C 204 )	M 271 DE 18 AL	271,820	135 kW (184 hp) at 5250	270 Nm at 1800–4600	2009-2015
SLK 200 BlueEFFICIENCY ( R 172 )	M 271 DE 18 AL	271,820	135 kW (184 hp) at 5250	270 Nm at 1800–4600	2011-2015
E 200 BlueEFFICIENCY ( W / S 212 )	M 271 DE 18 AL	271,820	135 kW (184 hp) at 5250	270 Nm at 1800–4600	2009-2013
E 200 BlueEFFICIENCY ( C / A 207 )	M 271 DE 18 AL	271,820	135 kW (184 hp) at 5250	270 Nm at 1800–4600	2010-2013
C 250 BlueEFFICIENCY ( W / S / C 204 )	M 271 DE 18 AL	271.860	150 kW (204 hp) at 5500	310 Nm at 2000-4300	2009-2015
SLK 250 BlueEFFICIENCY ( R 172 )	M 271 DE 18 AL	271.860	150 kW (204 hp) at 5500	310 Nm at 2000-4300	2011-2015
E 250 BlueEFFICIENCY ( W / S 212 )	M 271 DE 18 AL	271.860	150 kW (204 hp) at 5500	310 Nm at 2000-4300	2009-2013
E 250 BlueEFFICIENCY ( C / A 207 )	M 271 DE 18 AL	271.860	150 kW (204 hp) at 5500	310 Nm at 2000-4300	2009-2013

 * Engine designation is encoded as follows: M = engine (Otto), series = 3 digits, E = manifold injection, DE = direct injection, displacement = deciliters (rounded), M = compressor, A = exhaust gas turbocharger, L = charge air cooling, red. = reduced power, NGT = Natural Gas Technology

Web links

Commons : Mercedes-Benz M 271  - Collection of pictures, videos and audio files

Individual evidence

1. ↑ http://www.atzonline.de/Artikel/3/935/Neue-Vierylinder-Ottomotoren-von-Mercedes-Benz-mit-Kompressoraufladen-Teil-1-M-271-KE-drei-Leistungsvarianten-mit-Kanaleinspritzung .html  ( page no longer available , search in web archives )  Info: The link was automatically marked as defective. Please check the link according to the instructions and then remove this notice.  
2. ↑ http://media.daimler.com/dcmedia/0-921-658793-49-795726-1-0-0-0-0-1-12759-614216-0-0-0-0-0-0 -0.html? TS = 1282231685949  ( Page no longer available , search in web archives )  Info: The link was automatically marked as defective. Please check the link according to the instructions and then remove this notice.  
3. ↑ Archived copy ( Memento of the original from July 11, 2012 in the web archive archive.today ) Info: The archive link was automatically inserted and not yet checked. Please check the original and archive link according to the instructions and then remove this notice. 
4. ↑ http://www.mercedes-benz.de/content/media_library/germany/mpc_germany/de/mercedes-benz_deutschland/pkw_emb_nextgen/mehr_ueber_mercedes-benz/aktuelles___events/pkw_mercedes_world14.object-Single-MEDIA.download.tmp/20090714% % 20E10.pdf
5. ↑ http://www.autobild.de/artikel/kaufberatung-mercedes-benz-c-klasse_39951.html
6. ↑ http://www.mercedes-benz.de/content/media_library/germany/mpc_germany/de/mercedes-benz_deutschland/pkw_emb_nextgen/mehr_ueber_mercedes-benz/aktuelles___events/pkw_mercedes_world14.object-Single-MEDIA.download.tmp/20090714% % 20E10.pdf
7. ↑ http://www.autobild.de/artikel/mercedes-clk-200-cgi-elegance_39029.html
8. ↑ http://media.daimler.com/dcmedia/0-921-656512-49-1235386-1-0-0-0-0-1-12759-614216-0-0-0-0-0-0 -0.html? TS = 1282251740451  ( Page no longer available , search in web archives )  Info: The link was automatically marked as defective. Please check the link according to the instructions and then remove this notice.  
9. ↑ Archived copy ( memento of the original from July 10, 2012 in the web archive archive.today ) Info: The archive link was automatically inserted and not yet checked. Please check the original and archive link according to the instructions and then remove this notice. 
10. ↑ Archived copy ( Memento of the original from July 28, 2014 in the Internet Archive ) Info: The archive link was automatically inserted and not yet checked. Please check the original and archive link according to the instructions and then remove this notice. 
11. ↑ http://www.carmondo.de/forum/Mercedes-Benz/CLC-Klasse/Mercedes-CLC-160-BlueEfficiency-absofort-verfuegbar/show/5447
12. ↑ http://www.jesmb.de/news/news/w204.htm
13. ↑ http://www.ultimatespecs.com/?option=4&brand=13&model=355&car=1527
14. ↑ http://www.ultimatespecs.com/?option=4&brand=13&model=342&car=2404
15. ↑ Archived copy ( memento of the original from August 21, 2010 in the Internet Archive ) Info: The archive link was inserted automatically and has not yet been checked. Please check the original and archive link according to the instructions and then remove this notice. 
16. ↑ Archived copy ( Memento of the original from March 5, 2016 in the Internet Archive ) Info: The archive link was inserted automatically and has not yet been checked. Please check the original and archive link according to the instructions and then remove this notice. 
17. ↑ http://www.ultimatespecs.com/?option=4&brand=13&model=355&car=1529
18. ↑ http://www.ultimatespecs.com/?option=4&brand=13&model=354&car=1518
19. ↑ http://www.ultimatespecs.com/?option=4&brand=13&model=346&car=1424
20. ↑ Archived copy ( memento of the original from January 14, 2016 in the web archive archive.today ) Info: The archive link was automatically inserted and not yet checked. Please check the original and archive link according to the instructions and then remove this notice. 
21. ↑ http://www.ultimatespecs.com/?option=4&brand=13&model=484&car=2454
22. ↑ Archived copy ( memento of the original from August 21, 2010 in the Internet Archive ) Info: The archive link was inserted automatically and has not yet been checked. Please check the original and archive link according to the instructions and then remove this notice. 
23. ↑ http://www.carfolio.com/specifications/models/car/?car=150271
24. ↑ http://www.carfolio.com/specifications/models/car/?car=169268
25. ↑ Archived copy ( memento of the original from January 14, 2016 in the web archive archive.today ) Info: The archive link was automatically inserted and not yet checked. Please check the original and archive link according to the instructions and then remove this notice. 
26. ↑ http://www.ultimatespecs.com/?option=4&brand=13&model=342&car=1363
27. ↑ http://blog.mercedes-benz-passion.com/2010/04/e-klasse-ngt-limousine-mit-bivalenten-erdgasantrieb-feiert-auf-der-ami-leipzig-premiere/
28. ↑ http://www.carfolio.com/specifications/models/car/?car=119438
29. ↑ http://www.carfolio.com/specifications/models/car/?car=96404
30. ↑ Archived copy ( Memento of the original dated August 14, 2010 in the Internet Archive ) Info: The archive link was inserted automatically and has not yet been checked. Please check the original and archive link according to the instructions and then remove this notice. 
31. ↑ Archived copy ( Memento of the original dated August 14, 2010 in the Internet Archive ) Info: The archive link was inserted automatically and has not yet been checked. Please check the original and archive link according to the instructions and then remove this notice. 
32. ↑ Archived copy ( Memento of the original dated August 14, 2010 in the Internet Archive ) Info: The archive link was inserted automatically and has not yet been checked. Please check the original and archive link according to the instructions and then remove this notice. 
33. ↑ Archived copy ( Memento of the original dated August 14, 2010 in the Internet Archive ) Info: The archive link was inserted automatically and has not yet been checked. Please check the original and archive link according to the instructions and then remove this notice. 
34. ↑ Archived copy ( Memento of the original dated August 14, 2010 in the Internet Archive ) Info: The archive link was inserted automatically and has not yet been checked. Please check the original and archive link according to the instructions and then remove this notice. 
35. ↑ Archived copy ( Memento of the original dated August 14, 2010 in the Internet Archive ) Info: The archive link was inserted automatically and has not yet been checked. Please check the original and archive link according to the instructions and then remove this notice. 
36. ↑ Archived copy ( Memento of the original dated August 14, 2010 in the Internet Archive ) Info: The archive link was inserted automatically and has not yet been checked. Please check the original and archive link according to the instructions and then remove this notice.