Mercedes-Benz M271 | |
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Overview | |
Manufacturer | Mercedes-Benz |
Production | 2002–2015 |
Layout | |
Configuration | Straight-4 |
Displacement | 1.6 L (1,597 cc) 1.8 L (1,796 cc) |
Cylinder bore | 82 mm (3.23 in) |
Piston stroke | 75.6 mm (2.98 in) 85 mm (3.35 in) |
Cylinder block material | Cast aluminium |
Cylinder head material | Aluminium |
Valvetrain | DOHC 4 valves x cyl. and VVT |
Combustion | |
Supercharger | In some versions and intercooled |
Turbocharger | In DE18LA (M271Evo, 271.8XX) |
Fuel system | Sequential fuel injection Direct injection |
Fuel type | Gasoline |
Cooling system | Water cooled |
Output | |
Power output | 122–204 PS (90–150 kW; 120–201 hp) |
Chronology | |
Predecessor | Mercedes-Benz M111 engine |
Successor | Mercedes-Benz M274 engine |
The Mercedes-Benz M271 engine is a straight-4 automobile piston engine family used in the 2000s (decade).
All M271 engines are built in Untertürkheim, Germany. The family has a cast aluminium engine block and aluminium DOHC cylinder heads with 4 valves per cylinder and variable valve timing and a coil-on-plug ignition system.
The KE18 ML is a 1.8 L (1,796 cc) version. Bore and stroke is 82 mm × 85 mm (3.23 in × 3.35 in). Output ranges from 122 PS (90 kW; 120 hp) at 5200 rpm to 194 PS (143 kW; 191 hp) at 5800 rpm.
It uses sequential fuel injection, is supercharged and intercooled, and features fracture-split forged steel connecting rods. A version running on natural gas was introduced in the German market in 2002.
Applications: [1]
This engine had the same dimensions as E18 ML and almost the same features including a supercharger, but used CGI (Stratified Charged Gasoline Injection) gasoline direct injection. It has been produced since 2003 in only one version, with an output of 170 PS (125 kW; 168 hp) at 5300 rpm. The production ceased in 2005.
Applications: [3]
The KE16 ML is a 1.6 L (1,597 cc) version introduced in 2008. Bore and stroke is 82 mm × 75.6 mm (3.23 in × 2.98 in). It shares the same features with the KE18ML version, like supercharger and multi-point fuel injection. Output ranges from 129 PS (95 kW; 127 hp) at 5000 rpm to 156 PS (115 kW; 154 hp) at 5200 rpm.
Applications: [4]
This is the last version of M271 engine family. Dimensions are the same as E18 ML and DE18 ML, but the supercharger has been replaced with a turbocharger; like the DE18 ML it uses the CGI (Stratified Charged Gasoline Injection) gasoline direct injection. Output ranges from 156 PS (115 kW; 154 hp) at 5200 rpm to 204 PS (150 kW; 201 hp) at 5500 rpm.
Applications: [5]
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