Mercedes-Benz M 270 / M 274
| Mercedes Benz | |
|---|---|
|
|
| M 270 | |
| Manufacturer: | Mercedes Benz |
| Production period: | since 2011 |
| Design: | Inline four-cylinder |
| Engines: | 1.6 liters (1595 cm³) 2.0 liters (1991 cm³) |
| Previous model: |
M 266 M 271 |
| Successor: |
M 254 M 260 / M 264 M 282 |
The M 270 is a four- cylinder in-line petrol engine from Mercedes-Benz , which was presented in November 2011 in the second generation of the B-Class (W 246) . It thus replaces the M 266 series and, as the M 274, also the M 271 model in the medium term .
Production takes place in the Mercedes-Benz works in Stuttgart- Untertürkheim and at MDC Power GmbH in Kölleda . Production of the engine, developed independently by Daimler, began on July 29, 2011.
technology
The most noticeable technical feature of this engine is the possibility of transverse and longitudinal installation. While the engine is installed transversely in the compact front-wheel drive models A- and B- Classes and has the designation M 270 there , in the other models it is arranged lengthways and is referred to here as M 274 . This requires a very compact construction of the unit. For this purpose, the ancillary units were arranged closely and the cylinder spacing was designed to be 90 mm. Another development goal was weight reduction. The all-aluminum engine received a hollow cast crankshaft, which reduces the weight of the basic version to 137 kg thanks to the compact design.
All engines in this series are charged by an exhaust gas turbocharger. Despite the supercharging, the engines are highly compressed with a ratio of 10.3: 1. Initially the engine was built with a displacement of 1.6 l (1595 cm³, bore 83.0 mm, stroke 73.7 mm). In September 2012, a variant with a displacement of 2.0 l (1991 cm³, bore 83.0 mm, stroke 92.0 mm) and 155 kW (211 hp) in the A 250 BlueEFFICIENCY model followed .
The M 270 or M 274 is closely related to the BlueDIRECT V engines M 276 and M 278 . Accordingly, it has third-generation direct injection with jet-guided combustion, which is implemented via an A-nozzle piezo injector. In addition to the conventional, homogeneous mixture formation, stratified charging is also implemented in the large-displacement derivatives , which, in conjunction with charging, represents a novelty in engine technology.
A single-piston pump with a volume control valve integrated in the pump module is used as the high-pressure pump. This generates a map-controlled working pressure of up to 200 bar. Fuel is injected into the combustion chamber up to five times per work cycle, depending on the load range. A multi-spark ignition ignites the air-fuel mixture there.
The engine has two overhead chain driven camshafts . The timing is adjustable on both camshafts . In conjunction with the turbocharger, this enables what is known as scavenging , in which the opening times of the inlet and outlet valves partially overlap. Here, the cold fresh air drawn in flushes the hot exhaust gas still in the combustion chamber into the exhaust manifold , which significantly improves the cylinder filling. Due to the increased gas flow in the exhaust system, the turbocharger responds much faster, especially at low speeds. This avoids turbo lag. Thanks to direct injection, the fresh air is not mixed with fuel when it flows into the cylinder, which prevents purging losses (unburned gasoline escaping into the exhaust manifold).
The 1.6 l engines are optionally equipped with the so-called Camtronic system . This can switch to a smaller intake cam in partial load ranges, which enables a higher intake manifold pressure and thus avoidance of throttle losses. In conjunction with the variable intake camshaft, this allows load control with the camshaft when the loads are appropriate. With the M-270 and M-274 engines, a three-stage load control is implemented when operating with a small inlet cam: At very low loads, a reduced valve lift is selected so that the throttle valve has to be opened further for the same amount of air. At medium loads, the switch is made to the larger intake cams via, and at higher loads the intake manifold pressure is also increased via the turbocharger.
The compact design of the engine and the combustion process require sophisticated engine cooling . The coolant flows through a two-part water jacket with cross-flow cooling and through cooling channels only three millimeters thick between the spark plugs and the fuel injectors to the heat-loaded areas. In order to guarantee acceptable fuel consumption even at higher speeds, full load enrichment is only necessary at speeds above 200 km / h thanks to the efficient engine cooling system to cool the cylinder head. During a cold start, thanks to a demand-controlled water pump with a flow-optimized ball valve, no coolant flows through the engine. This leads to the operating temperature being reached quickly and thus contributes to lower fuel consumption and better wear behavior. The vehicle interior is also heated as quickly as possible. The thermostat also contains a flow-optimized ball valve. This is electronically regulated by the engine control depending on the driving style and ambient conditions and sets the optimal coolant temperature.
The oil pump was also equipped with a needs-based control, which contributes to further fuel savings. This is also the aim of the ECO start / stop function , which automatically switches the engine off and starts again without delay when it comes to short stops, such as traffic jams or red lights. It is the result of the simultaneous development of motors and gearboxes for transverse installation. For example, the control unit of the 7G-DCT dual clutch transmission communicates with the engine control unit in order to ensure the best possible response.
The following transmission variants are available for power transmission:
- Six-speed manual gearbox with automatic start-stop
- Seven-speed dual clutch transmission 7G-DCT with automatic start-stop for front-wheel drive vehicles
- 7G-Tronic Plus seven- speed automatic transmission with automatic start-stop for rear-wheel and all-wheel drive vehicles
- 9G-Tronic nine- speed automatic transmission with automatic start-stop for rear-wheel and all-wheel drive vehicles
variants
M 270: installed horizontally
M 270 DE 16 AL red. *
| Sales description | model series | Construction period |
|---|---|---|
| Displacement: 1595 cm³, power: 75 kW (102 hp) at 4500-6000 / min, torque: 180 Nm at 1200-3500 / min | ||
| A 160 | W 176 | 2015-2018 |
| B 160 | W 246 | since 2015 |
| Displacement: 1595 cm³, power: 90 kW (122 hp) at 5000 rpm, torque: 200 Nm at 1250–4000 rpm | ||
| CLA 180 | C 117 | since 2013 |
| CLA 180 BlueEFFICIENCY Edition | C 117 | since 2013 |
| A 180 A 180 BlueEFFICIENCY |
W 176 | 2013–2018 2012–2013 |
| A 180 BlueEFFICIENCY Edition | W 176 | 2013-2018 |
| B 180 B 180 BlueEFFICIENCY |
W 246 | since 2013 2011–2013 |
| B 180 BlueEFFICIENCY Edition | W 246 | since 2015 |
| GLA 180 | X 156 | since 2015 |
M 270 DE 16 AL *
| Sales description | model series | Construction period |
|---|---|---|
| Displacement: 1595 cm³, power: 115 kW (156 hp) at 5000 rpm, torque: 250 Nm at 1250–4000 rpm | ||
| CLA 200 | C 117 | since 2013 |
| GLA 200 | X 156 | since 2014 |
| A 200 A 200 BlueEFFICIENCY |
W 176 | 2013–2018 2012–2013 |
| B 200 B 200 BlueEFFICIENCY |
W 246 | since 2013 2011–2013 |
M 270 DE 20 AL *
| Sales description | model series | Construction period |
|---|---|---|
| Displacement: 1991 cc, power: 115 kW (156 hp) at 5000 rpm, torque: 270 Nm at 1250–4000 rpm | ||
| B 200 Natural Gas Drive | W 246 | 2013-2017 |
| Displacement: 1991 cc, power: 135 kW (184 hp) at 5000 rpm, torque: 300 Nm at 1250–4000 rpm | ||
| A 220 4MATIC | W 176 | 2014-2018 |
| B 220 4MATIC | W 246 | since 2013 |
| Displacement: 1991 cc, power: 155 kW (211 hp) at 5500 rpm, torque: 350 Nm at 1200–4000 rpm | ||
| CLA 250 | C 117 | since 2013 |
| GLA 250 | X 156 | since 2013 |
| Infiniti Q30s | Q30 | since 12/2015 |
| A 250 A 250 BlueEFFICIENCY |
W 176 | 2013–2018 2012–2013 |
| B 250 B 250 BlueEFFICIENCY |
W 246 | since 2013 2012–2013 |
| Displacement: 1991 cc, power: 160 kW (218 hp) at 5500 rpm, torque: 350 Nm at 1200–4000 rpm | ||
| CLA 250 Sport | C 117 | since 2015 |
| A 250 sport | W 176 | 2015-2018 |
M 274: installed lengthways
M 274 DE 16 AL *
| Sales description | model series | Construction period |
|---|---|---|
| Displacement: 1595 cm³, output: 95 kW (129 hp) at 5000 rpm, torque: 210 Nm at 1200–4000 rpm | ||
| C 160 | W / S 205 | since 2015 |
| Displacement: 1595 cm³, power: 115 kW (156 hp) at 5300 rpm, torque: 250 Nm at 1250-4000 rpm | ||
| C 180 BlueEFFICIENCY | W / S / C 204 | 2012-2015 |
| C 180 | W / S 205 | since 2014 |
| E 180 | W 212 | 2013-2016 |
| SLC 180 | R172 | since 2016 |
M 274 DE 20 AL *
| Sales description | model series | Construction period |
|---|---|---|
| Displacement: 1991 cc, power: 115 kW (156 hp) at 5000 rpm, torque: 270 Nm at 1250–4000 rpm | ||
| E 200 Natural Gas Drive | W 212 | 2013-2016 |
| Displacement: 1991 cc, power: 135 kW (184 hp) at 5500 rpm, torque: 300 Nm at 1200–4000 rpm | ||
| SLK 200 | R 172 | since 2015 |
| GLK 200 | X 204 | since 2013 |
| C 200 | W / S 205 | 2014-2018 |
| E 200 | C / A 207 | since 2013 |
| E 200 | W / S 212 | 2013-2016 |
| E 200 | W / S 213 | since 2016 |
| Displacement: 1991 cc, power: 155 kW (211 hp) at 5500 rpm, torque: 350 Nm at 1250–3500 rpm | ||
| Q50 | Infiniti Q50 | since 2014 |
| Metris | W / V 447 | 2015-2019 |
| Displacement: 1991 cc, power: 155 kW (211 hp) at 5500 rpm, torque: 350 Nm at 1200–4000 rpm | ||
| GLK 250 | X 204 | since 2013 |
| GLC 250 4MATIC | X / C 253 | since 2015 |
| C 250 | W / S 205 | 2014-2018 |
| C 350 e | W / S 205 | 2015-2018 |
| E 250 | C / A 207 | since 2013 |
| E 250 | W / S 212 | 2013-2016 |
| E 250 | W / S 213 | since 2016 |
| E 350 e | W / S 213 | since 2016 |
| GLE 350 e 4MATIC | V 167 | since 2020 |
| GLE Coupé 350 e 4MATIC | C 167 | since 2020 |
| Displacement: 1991 cm³, output: 180 kW (245 hp) at 5500 rpm, torque: 370 Nm at 1300–4000 rpm | ||
| SLK 300 | R 172 | since 2015 |
| C 300 | W 205 | 2015-2018 |
| E 300 | W / S 213 | since 2016 |
| GLC 300 4MATIC | X / C 253 | since 2016 |
* Engine designation is encoded as follows: M = engine (Otto), series = 3 digits, DE = direct injection, displacement = deciliters (rounded), A = exhaust gas turbocharger, L = charge air cooling, red. = reduced power
literature
- Norbert Merdes, Christian Enderle, Guido Vent, Ralph Weller: The new four-cylinder gasoline engine with turbocharging from Mercedes-Benz , in: MTZ - Motortechnische Zeitschrift 72 (2011), No. 12, pp. 942–951, Springer Vieweg, Wiesbaden
- Norbert Merdes, Reiner Pätzold, Nico Ramsperger, Hans-Georg Lehmann: The new R4 petrol engines M270 with turbocharging , in: ATZ extra - The new A-Class from Mercedes-Benz , pp. 58–63, Springer Vieweg, Wiesbaden, September 2012
- Mario Mürwald, Roland Kemmler, Anton Waltner, Fritz Kreitmann: The new four-cylinder gasoline engines from Mercedes-Benz , in: MTZ - Motortechnische Zeitschrift 74 (2013), No. 11, pp. 832–841, Springer Vieweg, Wiesbaden
Individual evidence
- ↑ Mercedes-Benz at the Geneva Salon 2012: Two world premieres, three European premieres in Geneva ( Memento of the original from April 6, 2013 in the Internet Archive ) Info: The archive link has been inserted automatically and has not yet been checked. Please check the original and archive link according to the instructions and then remove this notice.
- ↑ Daimler expands engine production bild.de, July 29, 2011
- ↑ The new A-Class - the drive: New engines for gasoline and diesel fuel ( Memento of the original from October 27, 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.
- ↑ media.daimler.com: The drive: high tech under the bonnet ( memento of the original from January 2, 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.
- ↑ media.daimler.com: Under the microscope: CAMTRONIC valve lift switching. ( Memento of the original from August 1, 2013 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.
- ↑ The B-Class: High Tech under the bonnet ( Memento of the original from May 25, 2012 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.
- ↑ New engine for the C 180 ( Memento of the original from April 6, 2013 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.
