Mitsubishi Orion engine

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Mitsubishi Orion engine
Overview
Manufacturer	Mitsubishi Motors
Also called	4G1
Production	1977–present
Layout
Configuration	Straight-4
Displacement	1.2–1.6 L (1,244–1,584 cc)
Cylinder bore	68.2 mm (2.69 in) 69.5 mm (2.74 in) 71 mm (2.8 in) 72.2 mm (2.84 in) 74 mm (2.91 in) 75.5 mm (2.97 in) 76 mm (2.99 in)
Piston stroke	82 mm (3.23 in) 87.3 mm (3.44 in)
Cylinder block material	Cast iron
Valvetrain	OHV 2 valves x cyl. SOHC 2 or 3 valves x cyl. DOHC 4 valves x cyl. with MIVEC or without
Compression ratio	9.4:1
Combustion
Turbocharger	TC06 (on 4G12T only)
Fuel system	Carburetor Multi-port fuel injection Direct injection
Fuel type	Gasoline
Cooling system	Water-cooled
Output
Power output	73–197 hp (54–147 kW)
Torque output	10.9–15.3 kg⋅m (107–150 N⋅m; 79–111 lb⋅ft)
Chronology
Predecessor	Neptune engine

The Mitsubishi Orion or 4G1 engine is a series of inline-four internal combustion engines introduced by Mitsubishi Motors in around 1977, along with the Astron, Sirius, and Saturn. It was first introduced in the Colt and Colt-derived models in 1978. Displacement ranges from 1.2 to 1.6 L (1,244 to 1,584 cc).

The 4G11 displaces 1.2 L (1,244 cc) with a bore and stroke of 69.5 mm × 82 mm (2.74 in × 3.23 in).

Applications:

• Mitsubishi Colt/Mirage A151A
• 1977.04-1979.03 Mitsubishi Lancer A141A
• 1979.03-1985.02 Mitsubishi Lancer Van A141V/A148V
• 1979.11-1983 Mitsubishi Lancer EX A171A

The 4G12 (also known as the G11B) displaces 1.4 L (1,410 cc) with a bore and stroke of 74 mm × 82 mm (2.91 in × 3.23 in). 4G12 was the first to feature Mitsubishi's MD (modulated displacement) technology, a form of variable displacement which shut off two cylinders during light load and at low speeds. The 4G12 was not offered by Mitsubishi with fuel injection. This engine is fairly outdated compared to its counterparts that were used in the later Lancers.

Applications:

• Mitsubishi Colt/Mirage A152A
• 1978.04-1979.03 Mitsubishi Lancer A142A
• 1979.03-1985.02 Mitsubishi Lancer Van A142V/A149V
• 1978.04-1981.07 Mitsubishi (Lancer) Celeste A142
• Mitsubishi Lancer EX A172A
• Mitsubishi Tredia/Cordia A211
• Dodge/Plymouth Colt
• Plymouth Champ

This is the turbocharged version of the 4G12, uses a TC-04 turbocharger from Mitsubishi Heavy Industries.^[1] The diameter of the blades in this charger is rather small, at 49 mm, and it spins at 90,000 rpm to provide 0.53 bar (7.7 psi) of boost. This increased power and torque by about 30 and 25 percent respectively.^[1] The Japanese-specification version of this engine produces 105 PS (77 kW) at 5,500 rpm and 15.5 kg⋅m (152 N⋅m; 112 lb⋅ft) of torque at 3,000 rpm.^[2]

The SOHC, 12 & 16 valve 4G13 displaces 1.3 L (1,298 cc) and produces 75–85 PS (55–63 kW) with a bore and stroke of 71 mm × 82 mm (2.80 in × 3.23 in). In the Gulf Countries, 90 PS (66 kW) gross at 6000 rpm is claimed on the mitsubishi lancer CB1.^[3] The 4G13 engine has been produced by Dongan Mitsubishi Motors Engine Manufacturing, in Harbin, China since September 1998.^[4]

The SOHC 4G15 displaces 1.5 L (1,468 cc) with a bore and stroke of 75.5 mm × 82 mm (2.97 in × 3.23 in). A version of the 4G15 was produced with gasoline multi-port fuel injection. It has approximately 94 hp (69 kW) on the 1993 Mirage model. The DOHC 4G15 produces 109 hp (81 kW) with 137 N⋅m (101 lb⋅ft) of torque. Another DOHC version was combined with GDI fuel injection and delivers 100 hp (74 kW) and 137 N⋅m (101 lb⋅ft) of torque. A DOHC MIVEC turbo variant of the engine is also still in production to date (4G15T), serving in the Mitsubishi Colt series, offering 165 hp (121 kW) on the latest Colt Version-R (with exhaust enhancement). The most powerful version of this engine is found in the Colt CZT Ralliart (special model in Switzerland) with a total output of 197 hp (147 kW). When installed in the Smart ForFour Brabus, the engine received the Mercedes-Benz engine code M122 E15 AL.

The 4G15 is known as one of the longest living Japanese engines ever produced where new variants of the engine are still being produced and used in Chinese cars since 2005. The 4G15 engine has been produced by Dongan Mitsubishi Motors Engine Manufacturing in Harbin, China. And also the new engines have been produced by GAC Mitsubishi Motors, a joint venture from the Hunan province in southern China, since April 2017.^[5]

This version of the 4G15 is a single overhead camshaft (SOHC) 8-valve, carburetor type engine. It is an in-line four with a compact type combustion chamber. The engine's advertised power was 77 PS (57 kW; 76 hp) (DIN) and 127 N⋅m (94 lb⋅ft) of torque.

The engine is an analogue of the Mitsubishi G15B in terms of the engine mechanical specifications except for the valve timing. The G13B is also equipped with jet valves and jet springs.

SPECIFICATIONS:

Total displacement: 1.5 L (1,468 cc)

Bore x Stroke: 75.5 mm × 82 mm (2.97 in × 3.23 in)

Compression Ratio: 9.4:1

A 12-valve version (two intake and one exhausts per cylinder) of the 1468 cc 4G15 engine. It entered production in 1989, for the third generation Mitsubishi Mirage/Lancer. It was available with a carburettor or fuel injection, producing 85 or 100 PS (63 or 74 kW) in Japanese market trim at the time of introduction.^[6] Later, a natural gas-powered version was added and in 1991 a new lean-burn technology called "Mitsubishi Vertical Vortex" (MVV) was introduced on this engine.

The 4G16 displaces 1.2 L (1,198 cc) from a 68.2 mm × 82 mm (2.69 in × 3.23 in) bore and stroke. This engine was mainly offered in European markets, where it suited local tax regulations.

Applications:

• Mitsubishi Colt/Mirage
• Mitsubishi Lancer

The 4G17 displaces 1.3 L (1,343 cc). It is a SOHC 12-valve engine. Bore and stroke is 72.2 mm × 82 mm (2.84 in × 3.23 in). Output of a carbureted version is 78 PS (57 kW; 77 hp) at 6,000 rpm and 10.9 kg⋅m (107 N⋅m; 79 lb⋅ft) of torque at 3,500 rpm.^[7]

Applications:

• 1991-2005 Mitsubishi Colt T120SS (Indonesia); production stopped due to Euro 2 emission standard that requires usage of gasoline-direct injection system, engine control unit / module (ECU/ECM), and catalytic converter usage.^[8]

The SOHC 4G18 displaces 1.6 L (1,584 cc) with a bore and stroke of 76 mm × 87.3 mm (2.99 in × 3.44 in). It is a 4-valve per cylinder engine, which produces from 98 PS (72 kW) to 110 PS (81 kW) with 150 N⋅m (111 lb⋅ft) (European specifications). It uses a COP (Coil-On-Plug, also known as Plug-top coil) ignition rely on one coil to fire two cylinders, one of which was by spark plug wire. The 4G18 engine has been produced by Dongan Mitsubishi Motors Engine Manufacturing , in Harbin, China since April 2010.^[9]

The DOHC MIVEC 4G19 displaces 1.3–litres and features four valves per cylinder. It produces 90 PS (66 kW; 89 hp) at 5,600 rpm and 121 N⋅m (89 lb⋅ft) of torque at 4,250 rpm. It was introduced in 2002, powering the then-new Mitsubishi Colt.

Applications:

• Mitsubishi Colt

• List of Mitsubishi engines
• List of Hyundai engines
• List of engines used in Chrysler products

• Mitsubishi Motors Technical Review 2003, p.111