| Mitsubishi 3B2 engine | |
|---|---|
 | |
| Overview | |
| Manufacturer | Mitsubishi Motors |
| Production | 2005–2020 |
| Layout | |
| Configuration | Three cylinder |
| Displacement |
|
| Cylinder bore | 65.4 mm (2.57 in) 72 mm (2.83 in) |
| Piston stroke | 65.4 mm (2.57 in) 81.8 mm (3.22 in) |
| Cylinder block material | Aluminum die cast |
| Cylinder head material | Aluminum die cast |
| Valvetrain | Direct actingDOHC,12 valves, intakecontinuously variable valve timingMIVEC |
| Compression ratio | 8.8:1-10.8:1 |
| Combustion | |
| Turbocharger | On 3B20T and 3B21T |
| Fuel system | Fuel injection |
| Fuel type | Gasoline |
| Cooling system | Water-cooled |
| Output | |
| Power output | 38–50 kW (52–68 PS) |
| Torque output | 57–95 N⋅m (42–70 lb⋅ft) |
| Dimensions | |
| Length | 286 mm (11.3 in) |
| Height | 191 mm (7.5 in) |
| Dry weight | 67 kg (148 lb) |
| Chronology | |
| Predecessor | Mitsubishi 3G8 engine |
| Successor | NMKV BR06 engine |
TheMitsubishi 3B2 engine is a family of all-alloythree cylinderengines developed byMitsubishi Motors, first produced in December 2005 at the company's Mizushima powertrain facility inKurashiki, Okayama,[1] for introduction in their 2006Mitsubishi ikei car. All engines developed within this family have aluminum cylinder block and head,double overhead camshafts,four valves per cylinder, andMIVECcontinuous variable valve timing.[1][2]
The 3B20 was designed with the "rear midship" layout in mind but is not limited to that. The basic dimensions chosen reduced the powerplant's height, thecylinder block's structure was simplified, a timing chain was adopted, modularized components were used for the oil and water pumps, engine mounts, and fuel system.[1] The aluminum construction and lightweight parts and materials in themanifolds helped reduce the weight of the engine by 20 percent compared with its iron-block3G83 predecessor, while gains were also seen in torque,fuel economy andemissions.[1]Bore pitch is 80 mm.
The preliminary version of the 0.7 L (659 cc) engine was first seen in the"i" Concept test car introduced in 2003, and used Mitsubishi'sSmart Idling system which turns off the engine automatically when the vehicle is stationary, and can restart it within 0.2 seconds.[3] So equipped, Mitsubishi claimed the prototype was capable of fulfilling the "three litre initiative" forgasolineengines, meaningfuel consumption of no more than 3 L/100 km (94 mpg‑imp; 78 mpg‑US).[3]
The larger 1.0 L (999 cc) capacity of the development engine was outside the limits of thekei class in Japan and was introduced in the second generation of thesmart fortwo.[4]
| Production | 2006-2013 | 2013 - 2020 |
| Configuration | Three cylinder 45° inclined | Three cylinder upright |
| Valve Train | chain drivenDOHC | |
| Aspiration | naturally aspirated | |
| Displacement | 0.7 L (659 cc) | |
| Bore x stroke | 65.4 mm × 65.4 mm (2.57 in × 2.57 in) | |
| Compression ratio | 10.8:1 | 10.9:1 or 12:1 |
| Fuel type | Regular unleaded gasoline | |
| Peak power | 38 kW (52 PS) at 7000 rpm | 36 kW (49 PS) at 6500 rpm |
| Peak torque | 57 N⋅m (42 lb⋅ft) at 4000 rpm | 56–59 N⋅m (41–44 lb⋅ft) at 5000-5500 rpm |
Applications:
| Production | 2006-2013 | 2013 - 2020 |
| Configuration | Three cylinder 45° inclined | Three cylinder upright |
| Valve Train | chain drivenDOHC | |
| Aspiration | turbocharger andIntercooler | |
| Displacement | 0.7 L (659 cc) | |
| Bore x stroke | 65.4 mm × 65.4 mm (2.57 in × 2.57 in) | |
| Compression ratio | 8.8:1 | 9.0:1 |
| Fuel type | Regular unleaded gasoline | |
| Peak power | 47 kW (64 PS) at 6000 rpm | 47 kW (64 PS) at 6000 rpm |
| Peak torque | 94 N⋅m (69 lb⋅ft) at 3000 rpm | 100 N⋅m (74 lb⋅ft) at 3000 rpm |
Applications:
This engine is also known asMercedes-Benz M132 E10
| Engine Type | 3B21 | 3B21 | 3B21 (North America) |
|---|---|---|---|
| Configuration | Three cylinder, 45° inclined, DOHC | ||
| Aspiration | naturally aspirated | ||
| Displacement | 1.0 L (999 cc) | ||
| Bore x stroke | 72 mm × 81.8 mm (2.83 in × 3.22 in) | ||
| Compression ratio | 10.0:1 | ||
| Fuel type | 95 Octane | Premium unleaded gasoline | |
| Peak power | 45 kW (61 PS) at 5800 rpm | 52 kW (71 PS) at 5800 rpm | 50 kW (68 PS) at 6000 rpm |
| Peak torque | 89 N⋅m (66 lb⋅ft) at 3000 rpm | 92 N⋅m (68 lb⋅ft) at 4500 rpm | 92 N⋅m (68 lb⋅ft) at 3000 rpm |
Applications:
This engine is also known asMercedes-Benz M132 E10 AL
| Engine Type | 3B21T | 3B21T (Brabus) | 3B21T (Brabus) |
|---|---|---|---|
| Configuration | Three cylinder, DOHC | ||
| Aspiration | turbocharger andIntercooler | ||
| Displacement | 1.0 L (999 cc) | ||
| Bore x stroke | 72 mm × 81.8 mm (2.83 in × 3.22 in) | ||
| Peak power | 62 kW (84 PS) at 5250 rpm | 72 kW (98 PS) at 5500 rpm | 75 kW (102 PS) at 6000 rpm |
| Peak torque | 120 N⋅m (89 lb⋅ft) at 3250 rpm | 140 N⋅m (103 lb⋅ft) at 3500 rpm | 147 N⋅m (108 lb⋅ft) at 2500 - 3600 rpm |
Applications: