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Mitsubishi 3B2 engine

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Mitsubishi 3B2 engine
Overview
ManufacturerMitsubishi Motors
Production2005–2020
Layout
ConfigurationThree cylinder
Displacement
  • 659 cc (0.7 L)
  • 999 cc (1.0 L)
Cylinder bore65.4 mm (2.57 in)
72 mm (2.83 in)
Piston stroke65.4 mm (2.57 in)
81.8 mm (3.22 in)
Cylinder block materialAluminum die cast
Cylinder head materialAluminum die cast
ValvetrainDirect acting DOHC, 12 valves, intake continuously variable valve timing MIVEC
Compression ratio8.8:1-10.8:1
Combustion
TurbochargerOn 3B20T only
Fuel systemFuel injection
Fuel typeGasoline
Cooling systemWater-cooled
Output
Power output38–50 kW (52–68 PS)
Torque output57–95 N⋅m (42–70 lb⋅ft)
Dimensions
Length286 mm (11.3 in)
Height191 mm (7.5 in)
Dry weight67 kg (148 lb)
Chronology
PredecessorMitsubishi 3G8 engine
SuccessorNMKV BR06 engine

The Mitsubishi 3B2 engine is a family of all-alloy three cylinder engines developed by Mitsubishi Motors, first produced in December 2005 at the company's Mizushima powertrain facility in Kurashiki, Okayama,[1] for introduction in their 2006 Mitsubishi i kei car. All engines developed within this family have aluminum cylinder block and head, double overhead camshafts, four valves per cylinder, and MIVEC continuous 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, the cylinder 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 the manifolds helped reduce the weight of the engine by 20 percent compared with its iron-block 3G83 predecessor, while gains were also seen in torque, fuel economy and emissions.[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's Smart 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" for gasoline engines, meaning fuel 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 the kei class in Japan and was introduced in the second generation of the smart fortwo.[4]

Specifications

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3B20

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Production 2006-2013 2013 - 2020
Configuration Three cylinder 45° inclined Three cylinder upright
Valve Train chain driven DOHC
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:


3B20T

[edit]
Production 2006-2013 2013 - 2020
Configuration Three cylinder 45° inclined Three cylinder upright
Valve Train chain driven DOHC
Aspiration turbocharger and Intercooler
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:


3B21

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This engine is also known as Mercedes-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:


3B21T

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This engine is also known as Mercedes-Benz M132 E10 AL

Engine Type 3B21T 3B21T (Brabus) 3B21T (Brabus)
Configuration Three cylinder, DOHC
Aspiration turbocharger and Intercooler
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:

See also

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References

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  1. ^ a b c d "Newly Developed Three-Cylinder MIVEC Engine" Archived 2007-09-29 at the Wayback Machine, Yukihiro Ryugo, Hiroaki Miwa, Mitsubishi Motors Technical Review, 2006, no.18, pp.95–97
  2. ^ "Development of Mitsubishi “i” Powertrain" Archived 2007-09-29 at the Wayback Machine, Hirofumi Higashi, Kuniaki Kaihara, Hideki Miyamoto, Masayuki Takagaki, Kazuteru Kurose, Satoshi Yoshikawa, Hideo Nakai, Masayuki Yamashita, Mitsubishi Motors Technical Review, 2004, no.16, pp.45–50
  3. ^ a b "Development of “i” Concept Test Car for 2003 IAA and 2003 Tokyo Motor Show" Archived 2007-09-29 at the Wayback Machine, Yoshinaka Kawakami, Takanori Yoshii, Mitsubishi Motors Technical Review, 2004 no.16, pp.29-50
  4. ^ "Mitsubishi Motors and smart sign agreement on engine supply", Mitsubishi Motors press release, Tokyo, October 28, 2005
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