Mitsubishi 3G8 engine
Template:Infobox automobile engine 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. In 1987 Mitsubishi was the first manufacturer to supercharge a kei vehicle, and in 1989 became the world's first production car to feature five valves per cylinder, ahead of similar developments by Bugatti, Audi, Ferrari and Toyota.[1][2]
Its 3G81 three-cylinder engine has a displacement of Template:Convert and the 15-valve versions feature 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 Template:Cvt engine, it was enlarged to Template:Cvt in 1990 following changes in the class regulations. The four-cylinder 4A3 engine is derived from the 3G8, sharing a Template:Cvt bore pitch.[3]
3G81
.JPG){kind=link}
Engine dimensions — Template:Convert inline three-cylinder
Bore — Template:Convert
Stroke — Template:Convert
Fuel type — Unleaded regular gasoline
Versions
| Valvetrain | Fuel feed | Comp. | Power (JIS net) | Torque | Fitment | Notes | |||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| PS | kW | at rpm | kgm | Nm | lbft | at rpm | |||||
| SOHC 6-valve | Single-barrel, downdraught carburetor |
9.8:1 | Template:Convert | 6,500 | Template:Convert | 3,000 | Mitsubishi Minica Econo H14V/15V (87.01–88.12) Mitsubishi Minica H21V/26V (89.01–90.02) |
Commercial vehicle emissions standards | |||
| Single-barrel, sidedraught variable venturi carburetor |
Template:Convert | 5,500 | Template:Convert | 4,000 | Mitsubishi Minicab U14T/V, U15T/V (87.06–90.02) Mitsubishi Bravo U14V/15V (89.02–90.02) | ||||||
| Double-barrel, downdraught carburetor |
Template:Convert | 6,500 | Template:Convert | 4,000 | Mitsubishi Minica H14A/15A (87.01–88.12) Mitsubishi Minica H21A/26A (89.01–90.02) |
||||||
| Single-barrel, sidedraught variable venturi carburetor, Supercharger |
8.5:1 | Template:Convert | 6,000 | Template:Convert | 4,000 | Mitsubishi Minicab U14T/V, U15T/V (87.06–91.02) Mitsubishi Bravo U14V/15V (89.02–91.02) |
|||||
| Single-barrel, downdraught carburetor, turbocharger |
Template:Convert | 6,500 | Template:Convert | 3,500 | Mitsubishi Minica/Econo H14A/V (87.01–88.12) | ||||||
| DOHC 15-valve | Double-barrel, downdraught carburetor | 10.0:1 | Template:Convert | 7,000 | Template:Convert | 4,500 | Mitsubishi Minica H21/26 (89.08–90.02) | ||||
| EFI | Template:Convert | 7,500 | Template:Convert | 5,500 | |||||||
| EFI, turbocharger, IC | 8.5:1 | Template:Convert | 7,500 | Template:Convert | 4,500 | Mitsubishi Minica Dangan ZZ H21/26 (89.01–90.08) | |||||
3G82
Displacement — Template:Convert
Bore — Template:Convert
Stroke — Template:Convert
Engine type — Inline three-cylinder SOHC 6 valves
Power — Template:Convert at unknown rpm
This was built only for the Taiwanese market Mitsubishi Towny (Minica) and Minicab 800, from 01.87 - 11.88. Most specifications are unknown.
3G83
Displacement — Template:Convert
Bore — Template:Convert
Stroke — Template:Convert
Fuel type — Unleaded regular gasoline
Double carb (1990)
- Engine type — Inline three-cylinder SOHC
- Power — Template:Convert at 6000 rpm
- Torque — Template:Convert at 4000 rpm
- Fuel system — two-barrel down-draft carburettor
- Compression ratio — 9.8:1
DOHC (1990)
- Engine type — Inline three-cylinder DOHC
- Compression ratio — 9.8:4
- Fuel system — ECI multiple
- Power — Template:Convert at 7500 rpm
- Torque — Template:Convert at 5700 rpm
Turbo (1990)
- Engine type — Inline three-cylinder DOHC 15-valve intercooled turbo
- Compression ratio — 8.5:1
- Fuel system — ECI multiple
- Power — Template:Convert at 7,500 rpm
- Torque — Template:Convert at 4,500 rpm
4G82
Displacement — Template:Convert
Bore — Template:Convert
Stroke — Template:Convert
Engine type — Inline four-cylinder SOHC
Power — Template:Convert JIS at 5,500 rpm
Torque — Template:Convert at 3,500 rpm[4]
Of the same dimensions as the 3G82 but with a fourth cylinder, this was built in Taiwan by CMC (China Motor Corporation). Used in the Mitsubishi Varica (LWB version of fourth generation Mitsubishi Minicab).