Mitsubishi 3G8 engine
From Wikipedia, the free encyclopedia
| 3G8 | |
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| Manufacturer | Mitsubishi Motors |
| Type: | Three cylinder |
| Production: | 1989–present |
| Block alloy: | Cast iron |
The Mitsubishi 3G8 engine is a range of three cylinder powerplant from Mitsubishi Motors, introduced in the fifth generation of their Mitsubishi Minica kei car. In common with other contemporary engines in the class, it could be specified with many advanced technologies despite its diminutive size, including multi-valve cylinder heads and double overhead camshafts. The top-of-the-line Dangan ZZ variant was also the first kei car to benefit from turbocharging, and in 1989 became the world's first production car to feature five valves per cylinder, ahead of similar developments by Bugatti, Audi and Ferrari.[1][2]
Its 3G81 three cylinder engine has a displacement of 548 cubic centimetres and features three intake valves and two exhaust valves incorporated into each cylinder. The valves are controlled by twin overhead camshafts through roller cam followers on finger rockers with hydraulic automatic lash adjusters. Gasoline is electronically injected through triple-jet nozzles (also a technological first). The water-cooled turbocharger operates through an air-to-air intercooler. The ignition timing advance is also controlled electronically, and a knock-sensing system is included.[1]
Originally a 550 cc engine, it was enlarged to 660 cc in 1990 following changes in the class regulations.
Contents |
[edit] 3G81
Displacement — 548 cc
Bore — 62.3 mm
Stroke — 60.0 mm
Fuel type — Unleaded regular gasoline
[edit] Single carb (1989)
- Engine type — Inline 3 cylinder SOHC
- Compression ratio — 9.8:1
- Fuel system — Single down-draft carburettor
- Power — 22 kW (30 PS) at 6500 rpm
- Torque — 41 N·m (30 ft·lbf) at 3000 rpm
[edit] Double carb (1989)
- Engine type — Inline 3 cylinder SOHC
- Compression ratio — 9.8:1
- Fuel system — 2-barrel down-draft carburettor
- Power — 24 kW (32 PS) at 6500 rpm
- Torque — 42 N·m (31 ft·lbf) at 4000 rpm
[edit] DOHC (1989)
- Engine type — Inline 3 cylinder DOHC 15 valve
- Compression ratio — 10.0:1
- Fuel system — ECI multiple
- Power — 34 kW (46 PS) at 7500 rpm
- Torque — 46 N·m (34 ft·lbf) at 5500 rpm
[edit] Turbo (1989)
- Engine type — Inline 3 cylinder DOHC 15 valve intercooled turbo
- Compression ratio — 8.5:1
- Fuel system — ECI multiple
- Power — 47 kW (64 PS) at 7500 rpm
- Torque — 75 N·m (55 ft·lbf) at 4500 rpm
[edit] 3G83
Displacement — 657 cc
Bore — 65.0 mm
Stroke — 66.0 mm
Fuel type — Unleaded regular gasoline
[edit] Double carb (1990)
- Engine type — Inline 3 cylinder SOHC
- Power — 29 kW (40 PS) at 6000 rpm
- Torque — 51 N·m (38 ft·lbf) at 4000 rpm
- Fuel system — 2-barrel down-draft carburettor
- Compression ratio — 9.8:1
[edit] DOHC (1990)
- Engine type — Inline 3 cylinder DOHC
- Compression ratio — 9.8:1
- Fuel system — ECI multiple
- Power — 38 kW (52 PS) at 7500 rpm
- Torque — 56 N·m (41 ft·lbf) at 5700 rpm
[edit] Turbo (1990)
- Engine type — Inline 3 cylinder DOHC 15 valve intercooled turbo
- Compression ratio — 8.5:1
- Fuel system — ECI multiple
- Power — 47 kW (64 PS) at 7500 rpm
- Torque — 96 N·m (71 ft·lbf) at 4500 rpm
[edit] See also
[edit] References
- ^ a b “A baby that sprints: tiny Mitsubishi engine blasts off with five valves”, Ward's Auto World (no. April 1989), <http://findarticles.com/p/articles/mi_m3165/is_n4_v25/ai_7535123>. Retrieved on 28 July 2007
- ^ "Mighty Minica ZZ-4", Michael Knowling, Autospeed, issue 353, October 19, 2005
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