MECHANICAL ENGINEERING TERMS 2

MECHANICAL ENGINEERING TERMS:-

1.)GEAR – A wheel with teeth that engage or mesh with teeth of another wheel.

2.)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.

3.)GEAR RATIO – The ratio of the number of teeth on two gears to mesh with each other.

4.)HANDLING– The ease of maneuvering a vehicle without slipping or skidding.

5.)HYDRAULIC BRAKE – A brake system using hydraulic fluid, piston and cylinders to provide extremely high pressure for brake application.

6.)HYDRAULIC CLUTCH – A clutch that uses hydraulic pressure to actuate the clutch. Used in heavy duty equipment and where the engine is away from the drivers compartment so that it would be difficult to use mechanical linkages.

7.)HYDRAULIC CONTROL VALVES – A system of valves that senses driving conditions and automatically shifts the transmission.

8.)HYPOID GEARS – Drive pinion and ring gears whose shape allows them to mesh off centre.

9.)INDEPENDENT SUSPENSION – A type of suspension system in which each wheel is independently supported by a spring. A suspension that allows up and down movement of one wheel without affecting the opposite wheel.

10.)INNER TUBE (tyre) – The inside rubber tube assembled in the tyre casing, it maintains the air at sufficient pressure to inflate the casing and adequately support the vehicle weight.

11.)FLUID FLY WHEEL– A liquid coupling used to transmit the engine effort (torque) to a clutch and transmission. This coupling is always a major part of the engine flywheel.

12.)FORWARD CONTROL TRUCK– has the engine either in or below the driver’s cabin.

MECHANICAL ENGINEERING TERMS 1

13.)FORWARD EFFICIENCY – is the ratio of the amount of driver input torque which is available at the wheels to turn the same to the total amount of input torque from the driver at the steering wheel.

14.)FOUR WHEEL DRIVE– Some cross country vehicles (Jeeps) have this arrangement. In this case, the engine power is transmitted to all the four wheels of the vehicle. The main advantage of this arrangement is the entire vehicle weight is available for traction.

15.)FRAME – The assembly of metal structural parts and channel sections that forms the base and supports the engine and body and is supported by the vehicle wheels.

16.)EMERGENCY BRAKE– is the hand brake, operated by a lever, is used when the vehicle is left parked and prevents the vehicle from moving. The hand brake can be applied to stop the vehicle when the service brake fails.

17.)EPICYCLIC GEAR– In the epicyclic gearing, at least one gear not only rotates about its own axis, but also rotates about some other axis.

18.)FADE (brake) – A condition that occurs when there is little braking effect with full brake pedal force.

19.)FINAL DRIVE – The final gear reduction between the engine and the drive wheels.

20.)FIXED CALIPER DISC BRAKES – Disc brakes using a caliper which is fixed in position and cannot move.

MECHANICAL ENGINEERING TERMS 1