4G9x family: Difference between revisions
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Mitsubishi's 4G9x family is a series of inline 4 cylinder engines ranging in size from 1.5 to 2.0 litres. They utilise a cast iron block with aluminum head and belt driven camshafts in single or double overhead form. As a small capacity engine it does not make use of [[Balance shaft|balance shafts]]. | Mitsubishi's 4G9x family is a series of inline 4 cylinder engines ranging in size from 1.5 to 2.0 litres. They utilise a cast iron block with aluminum head and belt driven camshafts in single or double overhead form. As a small capacity engine it does not make use of [[Balance shaft|balance shafts]]. | ||
The 4G9x showcases Mitsubishi's advanced engine technology with some variations available with MIVEC variable valve timing and lift, [[Modulated Displacement]] cylinder deactivation, turbocharging and [[Gasoline Direct Injection|Gasoline Direct Injection (GDI)]]. | The 4G9x showcases Mitsubishi's advanced engine technology with some variations available with MIVEC variable valve timing and lift, [[Modulated Displacement]] cylinder deactivation, turbocharging and [[Gasoline Direct Injection|Gasoline Direct Injection (GDI)]]. It has the distinction of being the first modern GDI engine developed. | ||
As with most of Mitsubishi's modern engines, the 4G9x family can have numerous variations within the same engine model. | As with most of Mitsubishi's modern engines, the 4G9x family can have numerous variations within the same engine model. | ||
Revision as of 10:51, 24 November 2018
| 4G9x | |
|---|---|
 | |
| Overview | |
| Manufacturer | Mitsubishi Motors |
| Layout | |
| Configuration | Inline 4 |
| Cylinder block alloy | Cast Iron |
| Cylinder head alloy | Aluminum alloy |
| Valvetrain | SOHC/DOHC |
Mitsubishi's 4G9x family is a series of inline 4 cylinder engines ranging in size from 1.5 to 2.0 litres. They utilise a cast iron block with aluminum head and belt driven camshafts in single or double overhead form. As a small capacity engine it does not make use of balance shafts.
The 4G9x showcases Mitsubishi's advanced engine technology with some variations available with MIVEC variable valve timing and lift, Modulated Displacement cylinder deactivation, turbocharging and Gasoline Direct Injection (GDI). It has the distinction of being the first modern GDI engine developed.
As with most of Mitsubishi's modern engines, the 4G9x family can have numerous variations within the same engine model.
4G91
The 4G91 was the first engine in the family and is a 1.5 Litre engine displacing 1496cc. It has a 78.4mm x 77.5mm bore and stroke.
The DOHC fuel injected version used a 9.5:1 compression ratio was used in upper-level Japanese Lancer, Mirage and Mirage Astis and produced 84 kW at 6000rpm and 135 Nm at 5000rpm.
The only other version of the engine was a DOHC carburetted version outputting 71 kW at 6000 rpm and 126Nm at 3500 rpm.
4G92
In late 1991, Mitsubishi released its the 1.6 Litre 4G92. The engine used a slightly larger 81mm bore over the 4G91 with the same 77.5mm stroke for a 1597cc displacement.
A DOHC version of the engine with a high 11:1 compression ratio (requiring the use of premium unleaded) generating 107 kW at 7000 rpm and 149 Nm at 4500 rpm was used in the Japanese market Mirage RS and Super R.
In 1992, Mitsubishi released its first MIVEC engine with the 4G92 MIVEC. It is one of the most powerful non-turbocharged Mitsubishi four cylinders built using a 11:1 compression ratio with MIVEC variable valve timing and lift. Power increased to 129kW at 7500 rpm and 1467 Nm at 7000 rpm. It's famed for being a revvy engine. It was used in the Japanese market Lancer MR, Mirage Cyborg/VR and high-power 1994 and newer Mirage Asti.
Following the 4G92 MIVEC, Mitsubishi released a version with Modular Displacement - its cylinder deactivation technology which helps to conserve fuel. It was only available for a few years before being dumped.
Mitsubishi also built a more modest version of the engine with SOHC and a lower 10.0:1 compression ratio. The engine was produced in different variants depending upon the market and year.
The early 4G92 for the European market (until 2001) used camshafts with 20°/42° intake and 54°/2° exhaust valve timing (open/close) and produced 83 kW at 6000 rpm and 137Nm at 5000rpm [1]. Later European and General Export versions of the engine used a camshaft with 4°/58° intake and 52°/16° exhaust valve timing and produced up to 77 kW at 6000 rpm and 141 Nm at 4500 rpm [2].
In Australia, the 4G92 was only available as the General Export 4G92 SOHC in the CC Lancer where it produced 77kW at 6000 rpm and 134 Nm at 4500 rpm.
4G92P
The 4G92P was the designation of the 4G92 used in Proton vehicles. In Australia, it was used in the Proton Satria, Persona and Wira XLi models and produced 83 kW at 6000 rpm and 137 Nm at 4000 rpm.
4G93
The 4G93 is a 1.8 Litre engine with a displacement of 1834cc. It uses a 81.0x89.0mm bore and stroke and is made in 4 valve per cylinder SOHC, DOHC, DOHC turbo and DOHC with GDI forms.
In Australia the SOHC engine was used in the CC-CE Lancer and Pajero iO. The DOHC turbo engine was fitted to the CC Lancer GSR.
4G94
The 4G94 is the largest of the family at 2.0 Litres. It has a displacement of 1999cc with a 81.5x95.8mm bore and stroke and is available in 4 valve per cylinder SOHC and DOHC with GDI versions.
In Australia the SOHC version was used in the CG and CH Lancer and Pajero iO.
| MITSUBISHI PETROL ENGINES | |
| 3 cylinder | |
| 3A9x | 3A90 3A91 3A92 |
| 4 cylinder | |
| Neptune | 4G41 4G42 |
| Orion | 4G11 4G12 4G13 4G15 4G17 4G18 4G19 G4ED |
| Sirius | 4G61 4G62 4G63 4G64 4G67 4G69 |
| Astron | 4G51 4G52 4G53 4G54 |
| Astron II | Original Revised |
| Saturn | 4G30 4G31 4G32 4G33 4G37 |
| 4G9x | 4G91 4G92 4G93 4G94 |
| 4A9x | 4A90 4A91 4A92 |
| 4B1x | 4B10 4B11 4B11T 4B12 |
| Inline 6 | |
| Saturn 6 | 6G34 |
| V6 | |
| 6G7x | 6G71 6G72 SOHC 12v 6G72 SOHC 24v 6G72 DOHC Early 6G74 Late 6G74 Ralliart 6G74 6G75 |
| 6A1x | 6A10 6A11 6A12 6A13 |
| 6B3x | 6B31 |
| V8 | |
| 8A80 | 8A80 |
