Mitsubishi Orion 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.

4G11

The 4G11 displaces with a bore and stroke of.
Applications:
The 4G12 displaces with a bore and stroke of. 4G12 was the first to feature Mitsubishi's MD 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 This engine is fairly outdated compared to its counterparts that were used in the later Lancers.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:
This is the turbocharged version of the 4G12, uses a TC-04 turbocharger from Mitsubishi Heavy Industries. The diameter of the blades in this charger is rather small, at 49 mm, and it spins at 90,000 rpm to provide of boost. This increased power and torque by about 30 and 25 percent respectively. The Japanese-specification version of this engine produces at 5,500 rpm and of torque at 3,000 rpm.

4G13

The SOHC 4G13 displaces 12 valves with a bore and stroke of. In the Gulf Countries, gross at 6000 rpm is claimed.
The SOHC 4G15 displaces with a bore and stroke of. A version of the 4G15 was produced with gasoline multi-port fuel injection. It has approximately on the 1993 Mirage model. The DOHC 4G15 produces with of torque. Another DOHC version was combined with GDI fuel injection and delivers and of torque. A DOHC MIVEC turbo variant of the engine is also still in production to date, serving in the Mitsubishi Colt series, offering on the latest Colt Version-R. The most powerful version of this engine is found in the Colt CZT Ralliart with a total output of. The 4G15 is known as one of the longest lived Japanese engines ever produced. There was a recorded instance of the engine exceeding in a 1998 Mitsubishi Mirage sedan.
This version of the 4G15 is a single overhead camshaft 8-valve, carburetor type engine. It is a in-line four with a compact type combustion chamber. The engine's advertised power was and 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: '
Bore x Stroke: '
Compression Ratio: 9.4:1

4G15 12-Valve

A 12-valve version 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 in Japanese market trim at the time of introduction. Later, a natural gas-powered version was added and in 1991 a new lean-burn technology called "Mitsubishi Vertical Vortex" was introduced on this engine.

4G16

The 4G16 displaces from a bore and stroke. This engine was mainly offered in European markets, where it suited local tax regulations.
Applications:
The 4G17 displaces. It is a SOHC 12-valve engine. Bore and stroke is. Output of a carbureted version is at 6,000 rpm and of torque at 3,500 rpm.
Applications:
The SOHC 4G18 displaces with a bore and stroke of. It is a 4-valve per cylinder engine, net with . It uses a COP ignition rely on one coil to fire two cylinders, one of which was by spark plug wire.
The DOHC MIVEC 4G19 displaces 1.3-litres and features four valves per cylinder. It produces at 5,600 rpm and of torque at 4,250 rpm. It was introduced in 2002, powering the then-new Mitsubishi Colt.
Applications: