| Mitsubishi 4A9 engine | |
|---|---|
 | |
| Overview | |
| Manufacturer | Mitsubishi Motors MDC Power |
| Production | 2004–present (1.3 and 1.5) 2010–present (1.6) |
| Layout | |
| Configuration | Naturally aspirated Straight-4 |
| Displacement | 1.3 L (1,332 cc) 1.5 L (1,499 cc) 1.6 L (1,590 cc) |
| Cylinder bore | 75 mm (2.95 in) |
| Piston stroke | 75.4 mm (2.97 in) 84.8 mm (3.34 in) 90 mm (3.54 in) |
| Cylinder block material | Aluminum die cast |
| Cylinder head material | Aluminum die cast |
| Valvetrain | Direct acting DOHC, 16 valves, continuously variable MIVEC intake valve timing |
| Compression ratio | 10.5:1, 11.0:1 |
| Combustion | |
| Fuel system | Fuel injection |
| Fuel type | Gasoline |
| Cooling system | Water cooled |
| Output | |
| Power output | 70–86 kW (95–117 PS; 94–115 hp) |
| Torque output | 125–154 N⋅m (92–114 lb⋅ft) |
| Chronology | |
| Predecessor | Mitsubishi 4G1 engine |
The Mitsubishi 4A9 engine is the newest family range of all-alloy inline four-cylinder engines from Mitsubishi Motors, introduced in the 2004 version of their Mitsubishi Colt supermini, and built by DaimlerChrysler-owned MDC Power in Germany (previously a joint venture).[1][2]
The engine project was begun as a joint effort by Mitsubishi Motors and DaimlerChrysler (DCX), with Mitsubishi handling the development of the engines and MDC Power GmbH, a company previously jointly established by Mitsubishi and DCX, handling production. The 4A9 is Mitsubishi's first four-cylinder engine family to adopt a high-pressure die-cast aluminum block.[1][3]
All engines developed within this family have aluminum cylinder block and head, four valves per cylinder, double overhead camshaft layouts, and MIVEC continuous variable valve timing (intake only).
- ^ a b "Newly Developed Compact, Aluminum Gasoline Engine" Archived 2007-09-29 at the Wayback Machine, Mitsubishi Motors technical review
- ^ "Mitsubishi Motors Corporation and DaimlerChrysler AG have signed agreements concerning the production halt of the smart forfour", Mitsubishi Motors press release
- ^ "Colt Plus gets MDC Power", Jack Yamaguchi, SAE International