ONE WAY CLUTCH – A clutch that holds in one direction but allows movement in another direction. OVER DRIVE – A device in the power train of some vehicles that introduces an extra set of gears into the power train. This causes the propeller shaft to overdrive or drive faster than the engine crankshaft. Engine speed is…
NEUTRAL STEER – A vehicle that will maintain the selected turn with no driver input. NON DIRECTIONAL SENSE – Steering does not lead in any direction. NON LOAD CARRYING BODY – In this, the loads on the vehicle are transferred to the suspension system entirely by a separate chassis. The body is isolated from the chassis deflection by…
MECHANICAL EQUIVALENT OF HEAT – Relationship between the unit of heat and unit of work. MEAN EFFECTIVE PRESSURE – The average resultant pressure acting on the piston during the stroke that is the effective pressure which compresses and discharges the air. This is the difference between the mean forward pressure and the mean back pressure. MECHANICAL EFFICIENCY –…
LATERAL LOAD (tyre) – The force on the side of the tyre treads. LEADING SHOE – A brake shoe that has the drum rotating from the toe toward heel. LEADING TRAILING BRAKE – A drum brake assembly having one shoe energized in either forward or rearward wheel rotation. LEAF SPRING – A spring made up of a series of…
KINETIC ENERGY – Energy due to momentum, that is, the energy of a moving body, which is equivalent to saying, dynamic inertia. KING PIN – The steel pin on which the steering knuckle pivots, it attaches the steering knuckle to the knuckle support or axle. KING PIN INCLINATION – Inward tilt of the king pin from the vertical….
JOUNCE – A compression load on the springs as the space between the frame and the axle is reduced. JOUNCE BUMPER – A rubber bumper used to absorb shock during full suspension system movement. JOURNAL – In a shaft, the hardened polished area that is used with a bearing. JET PROPULSION – The unit in which the gas turbine…
INDICATED HORSE POWER – The actual power developed within a cylinder as calculated from the indicator diagram. INDICATED WORK – The work of compression plus the work of expulsion of the air from the cylinder minus the work done on the piston by the pressure of the air during admission. INLET LINE LOADER – An unloader that automatically…
HOPPER COOLED SYSTEM – A non (external) circulating system. The cylinder has an open water jacket of considerable volume. HALF AXLE DRIVE SHAFTS – Two in number, transmit the driving torque from the final drive and differential unit to the driving road wheels. HANDLING – The ease of manoeuvring a vehicle without slipping or skidding. HARSHNESS – Bumpy ride…
GEAR – A wheel with teeth that engage or mesh with teeth of another wheel. GEAR BOX – A unit which has a series of gears and shafts to vary the speed of the gearbox output shaft compared to the engine speed. This in turn increases the torque and thereby improves acceleration of the vehicle. GEAR CLASH –…
FEATHER VALVE – A valve which consists of a strip of ribbon steel which covers a slightly narrower slot when the value is closed. FINGER VALVES – Valves consist of narrow strips of stainless steel, fastened to the seat at one end and free to flex along their length. Suitable for light service. FIXED COMPRESSOR – A compressor…