trunk piston
In a single-acting engine, an elongated hollow piston, open at the end, in which the end of the connecting rod is pivoted. The piston rod, crosshead and stuffing box are thus dispensed with.
Mechanical engineering
261 entries in this trade.
two-stroke
adjectiveMechanical engineering
Of or relating to a design of internal combustion engine, the working cycle of which is completed during two strokes of the piston.
underactuate
To make less easily actuated or responsive.
undershift
A misalignment resulting from failure to shift gears far enough.
unport
To flow away from, and, thus, fail to enter, its intake or drain port.
unporting
The action or process of unporting.
utters
Unwanted depressions or other marks on the surface of an object caused when a tool is pressed too hard or vibrates against the surface.
V16
An internal combustion engine with sixteen cylinders in two banks of eight in a V-shaped formation.
V4
An internal combustion engine with four cylinders in two banks of two in a V-shaped formation.
valve gear
The mechanism of a steam engine that operates the inlet and exhaust valves to admit steam into the cylinder and allow exhaust steam to escape, respectively, at the correct points in the cycle.
vapor lock
A problem mostly affecting gasoline-fueled internal combustion engines, where the liquid fuel changes state from liquid to gas while still in the fuel delivery system, reducing the pump pressure and causing transient power loss or complete stalling.
Varignon's theorem
A theorem stating that the torque of a resultant of two concurrent forces about any point is equal to the algebraic sum of the torques of its components about the same point.
Vickers hardness
The hardness of a material according to the Vickers hardness test, based on its ability to resist plastic deformation from a standard source.
virial
One-half of the product of the stress of attraction or repulsion with the distance between two particles.
VSV
Initialism of variable stator vane.
wastegate
A valve that allows exhaust gases to bypass an engine's turbocharger, in order to keep from overspeeding the turbocharger rotor or driving the boost pressure high enough to risk engine knocking or detonation.
wedge gear
A specialized friction gear characterized by circumferential grooves of wedge-shaped cross section on its wheel periphery.
wet heater
A torpedo engine where water is injected into the combustion chamber alongside fuel and compressed air or oxygen, cooling the engine and increasing its power through the production and expansion of steam.
wheel lathe
A lathe for the manufacture and resurfacing of the wheels for rail vehicles.
workspace
The set of points that can be reached by the end-effector of a robotic manipulator.
zoomy
sleek, speedy, streamlined