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Turbocharged and intercooled 4D56 engine in a 1991 Mitsubishi Pajero. Displacement - 2.5 L (2,477 cc) Bore x Stroke - 91.1 mm × 95 mm (3.59 in × 3.74 in) Fuel type - DIESEL This engine is also built by Hyundai in South Korea, meaning it also sees use in some products made by their Kia subsidiary.
This version was called the "New Grace". Both the 2.4-litre petrol and 2.5-litre turbo-diesel inline-four engines were available, both Mitsubishi designs. Hyundai terminology resulted in the 4D56 diesel engine being renamed D4BX / D4BA. It takes two more minor changes at each 1996 and 2002, production ended in end of 2003.
It is fitted with a 93 mm (3.66 in) stroke crankshaft and the cylinder bore diameter is 82.7 mm (3.26 in). This engine uses pistons with a static compression ratio of 22.4:1 and piston pins are 25 mm (0.98 in) OD. It was available either naturally aspirated or turbocharged, and replaced the 4D65 as Mitsubishi's "go-to" diesel.
A piston ring is a metallic split ring that is attached to the outer diameter of a piston in an internal combustion engine or steam engine. The main functions of piston rings in engines are: Sealing the combustion chamber so that there is minimal loss of gases to the crank case.
Both an increased stroke or bore cause an increased secondary vibration; a larger stroke increases the difference in acceleration and a larger bore increases the mass of the pistons. The Lanchester design of balance shaft systems was refined with the Mitsubishi Astron 80, an inline-four car engine introduced in 1975. This engine was the first ...
In a piston engine, the bore (or cylinder bore) is the diameter of each cylinder. Engine displacement is calculated based on bore, stroke length and the number of cylinders: [1] displacement = π ( 1 / 2 × bore ) 2 × stroke × n cylinders
In a reciprocating engine, top dead centre of piston #1 is the point from which ignition system measurements are made and the firing order is determined. For example, ignition timing is normally specified as degrees of crankshaft rotation before top dead centre (BTDC). [2]
The older flathead engine design uses a "bathtub"-shaped combustion chamber, with an elongated shape that sits above both the piston and the valves (which are located beside the piston). IOE engines combine elements of overhead valve and flathead engines; the intake valve is located above the combustion chamber, while the exhaust valve is ...
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