A B C D E F G H I J K L M N O P Q R S T U V W X Y Z
N
Nave: Part of a wheel: connects the rim to wheel hub.
NDS: Neutral Drive Switch.
Needle Bearing: A bearing made from small diameter rollers in between inner and outer bearing tracks.
Needle Valve: (1) Valve by which fluid flow rate is controlled by the degree of insertion of a tapered needle into a fixed diameter orifice. This type of valve can provide a fine gradation of flow. (2) Valve in which a blunt, conically ended needle seats on a fixed diameter orifice. With this type of valve there is little or no gradation of flow, control being limited to full, with needle lifted, or none, with needle seated.
Negative Camber: Steering geometry where the road wheel leans inward at the top.
Negative Castor: Angle in side elevation between the steering and vertical axis. Steering axis hits the ground behind the vertical axis.
Negative Offset (Wheel): The position of the wheel nave or disc when inside the centre line of the wheel.
Negative Scrub: Negative scrub radius steering geometry where a line through the steering swivel axis meets the road surface outside of the tyre centre line.
Negative Temperature Coeffcient: Type of resistor that has resistance reducing with increases in temperature. These resistors are used in electrical circuits to give temperature sensing and control. Thermistor.
Neutral: Gearbox position when no gear is selected and no drive transmitted.
Neutral Drive Switch: On a transmission system, a switch that makes when neutral is selected.
Neutral Steer: Steering condition when the vehicle follows a true line in relation to the steered wheels.
Neutron: One of a number of particles in the nucleus of an atom. The neutron has no polarity and is electrically neutral.
Newton (N): A standard unit of force.
Nip (Bearing): The amount by which shell bearing halves are clamped in order to secure them in their housing.
Non Independent: Describes suspension systems using a solid beam axle where the movement of one wheel affects the other wheel on the same axle.
Non-porous: Prevents flow or holds back a liquid.
Non-Return Valve: A valve that will allow fluid or gas to pass in one direction only.
Normally Aspirated: Non pressure-charged engine using atmospheric pressure and cylinder vacuum to charge the cylinders.
North Pole: The term used to describe one of the poles of a magnet where the magnetic field lines of force start.
NOx: Oxides of nitrogen. An exhaust emission pollutant.
Nozzle: The tip of an injector from where the fuel is sprayed.
NTC Resistor: Type of resistor that has resistance reducing with increases in temperature. Used for temperature sensors.
Nucleus: (1) The mass of neutrons and protons at the centre of an atom. (2) A group of atoms forming the base of a compound.