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A desaxe engine, is one in which each cylinder is positioned with its exact center (the bore axis) slightly offset from the center line of the crankshaft. "Désaxé", in French, means "unbalanced". Desaxe engines are usually automotive, but the term can also apply to steam engines. An animation of a Scuderi Split Cycle Engine.
An engine is described as oversquare or short-stroke if its cylinders have a greater bore diameter than its stroke length, giving a bore/stroke ratio greater than 1:1. An oversquare engine allows for more and larger valves in the head of the cylinder, higher possible rpm by lowering maximum piston speed, and lower crank stress due to the lower ...
Testing is done on an engine which is not running, and normally with the tested cylinder at top dead center on compression, although testing can be done at other points in the compression and power stroke. Pressure is fed into a cylinder via the spark plug hole and the flow, which represents any leakage from the cylinder, is measured. Leak-down ...
Most were four-cylinders, but six-cylinder versions were also offered, mainly for boats but also for heavier vehicles. Volvo Penta made a series of engines based on the six-cylinder XDP (MD27-32). [1] The two-digit codes refer to the bore of the engine: XD75; XD80 — 1.6 L (1,608 cc) XD85 — 1.8 L (1,816 cc) XDP-6.85 — 2.7 L (2,724 cc ...
Bore × stroke are 3.501 by 3.625 inches (88.9 mm × 92.1 mm), and compression is 8.0:1. Overheating was a serious concern for the engine, since the engine block was of an open-deck design, severe overheating could cause the cylinder barrels to warp and pull away from the head gasket, causing coolant leaks into the cylinders and cylinder scuffing.
Bent connecting rod after Hydrolock Same connecting rod, turned 90°. Hydrolock (a shorthand notation for hydrostatic lock or hydraulic lock) is an abnormal condition of any device which is designed to compress a gas by mechanically restraining it; most commonly the reciprocating internal combustion engine, the case this article refers to unless otherwise noted.
Bright light therapy, a standard treatment for seasonal depression, may also help people who experience depression year-round, a study shows. Researchers found that patients with non-seasonal ...
If the detonation is severe, the cylinder pressure can increase to eight times above normal pressures, [citation needed] which can cause the cylinder head to lift away from the engine block, disrupting the seal between the two. Most gaskets used in standard production engines can be critically damaged by severe detonation.
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