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A sleeve valve takes the form of one (or in the case of double sleeve valves, two) machined cylinders which fit concentrically between the piston and the cylinder block bore of an internal combustion engine having cross-flow induction/exhaust. These sleeves have inlet and exhaust ports machined in the periphery, analogous to a two-stroke motor ...
The sleeves are operated by small connecting rods actuated by an eccentric shaft and have ports cut out at their upper ends. The cylinder head (known as the "junk head") is like a fixed, inverted piston with its own set of rings projecting down inside the inner sleeve. The heads are individually detachable for each cylinder.
In the 1980s, many U.S. production engine remanufacturers began reaming valve guides, rather than replacing them, as part of their remanufacturing process. They found that by reaming all the valve guides in a head to one standard size (typically 0.008 in. diametrically oversized), and installing remanufactured engine valves having stems that are also oversized, a typical engine head can be ...
Cylinder liners (also known as sleeves) are thin metal cylinder-shaped parts which are inserted into the engine block to form the inner wall of the cylinder. [4] [5] Alternatively, an engine can be 'sleeveless', where the cylinder walls are formed by the engine block with a wear-resistant coating, such as Nikasil or plasma-sprayed bores.
Sectioned cylinder showing sleeve valve. The Centaurus had a cylinder swept volume of 3,272 cu in (53.6 L), nearly as much as the American 3,347.9 cu in (54.9 L) Wright R-3350 Duplex-Cyclone large radial, making the Centaurus one of the largest aircraft piston engines to enter production, while that of the Hercules was 2,363 cu in (38.7 L). The ...
Wet liner cylinder blocks use cylinder walls that are entirely removable and fit into the block using special gaskets. They are called "wet liners" because their outer sides come in direct contact with the engine's coolant. In other words, the liner is the entire cylinder wall, rather than merely a sleeve.
2002–2006 Bowler Wildcat- this used a hybrid 5.0-litre V8 with Land Rover cylinder heads and a TVR block and piston assembly. Moreover, in the mid-1980s, hot rodders discovered the 215 could be stretched to as much as 5.0 L (305 cu in), using the Buick 300 crankshaft, new cylinder sleeves, and an assortment of non-Buick parts. [12]
Piston engines are usually designed with the cylinders in lines parallel to the crankshaft. It is called a straight engine (or 'inline engine') when the cylinders are arranged in a single line. Where the cylinders are arranged in two or more lines (such as in V engines or flat engines), each line of cylinders is referred to as a 'cylinder bank ...
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