week 2.pdf
- 6. The drive-train of a motor vehicle is the group of components that deliver power to the driving wheels. It varies the torque applied to the drive wheels, depending on load. Transmission Axles Drive shaft Differential
- 12. Suspension is the system of tires, tire air, springs, shock absorbers and linkages that connects a vehicle to its wheels and allows relative motion between the two. •Struts •Shocks •Springs •Control arms •Ball Joints •Knuckle •Damper
- 14. Steering is the collection of components, linkages, etc. which allows any vehicle (car, motorcycle, bicycle) to follow the desired course. The primary purpose of the steering system is to allow the driver to guide the vehicle(Controls the direction of the vehicle). •Steering Wheel •Steering Gear Box •Power steering Pump •Steering Linkage •Rack-and-pinion •Tie rod •Idler arm
- 15. A brake is a mechanical device that inhibits motion by absorbing energy from a moving system. It is used for slowing or stopping a moving vehicle, wheel, axle, or to prevent its motion, most often accomplished by means of friction. •Converts kinetic Energy into Heat. •Wheel cylinder, Shoes, Drums – Rear •Caliper, Pads, Rotors – FRONT •Master Cylinder •Brake Fluid •Lines / Hoses
- 17. The engine is the source of power for the vehicle It converts the energy stored in fuel into motion
- 31. Fuel is burned inside the engine’s combustion chamber to produce heat Heat causes expansion of gases in the engine Expansion in the combustion chamber produces pressure Engine components convert pressure into rotating motion
- 33. Top dead center (TDC) ▪ piston is at its highest point in the cylinder Bottom dead center (BDC) ▪ piston is at its lowest point in the cylinder Piston stroke ▪ distance the piston slides up or down from TDC to BDC
- 35. Requires four piston strokes to complete one cycle Every four strokes, the engine produces one power stroke Two complete crankshaft rotations are required to complete the four-stroke cycle Almost all automobiles use four-stroke- cycle engines
- 36. Draws fuel and air into the engine Intake valve is open Exhaust valve is closed Piston slides down and forms a low pressure area in the cylinder Atmospheric pressure pushes the air-fuel mixture into the cylinder
- 37. Compresses (squeezes) the air-fuel mixture, making it more combustible Piston slides upward Both valves are closed
- 38. Burns the air-fuel mixture and pushes the piston down with tremendous force Both valves are closed Spark plug fires, igniting the air-fuel mixture Pressure forms on the top of the piston Piston is forced down, rotating the crankshaft
- 39. Removes the burned gases from the cylinder Piston moves upward Intake valve is closed Exhaust valve is open Burned gases are pushed out the exhaust port
- 44. Designed to reduce friction between moving parts. By reducing friction, engine temperature drops, hence lowering wear on the moving parts. ➢Grease ➢Oil ➢Oil Pump ➢Oil Pan ➢Oil Filter ➢Oil Gauge ➢Oil Galleries
- 45. A vehicle’s engine-cooling system serves not just to keep the engine cool, but to also keep its temperature warm enough to ensure efficient, clean operation. •Radiator •Fan •Hoses •Thermostat •Water Jackets •Coolant •Water pump •Reserve Tank •215°F - 235°F
- 46. A vehicle’s engine-cooling system serves not just to keep the engine cool, but to also keep its temperature warm enough to ensure efficient, clean operation. •Radiator •Fan •Hoses •Thermostat •Water Jackets •Coolant •Water pump •Reserve Tank •215°F - 235°F
- 47. Removes the Exhaust gases from the engine, muffles the sound, cleans and cools the burned gases before they enter the atmosphere. •Headers / Exhaust manifold •Catalytic Converter •Exhaust Pipes •Muffler •Resonator
- 48. The function of the vehicle fuel system is to store and supply fuel to the engine. •Correct Air to Fuel ratio is 14.7 : 1 (Stoichiometric Ratio) •Four common fuels: ▪Petrol ▪Diesel ▪Propane (LPG) ▪Natural Gas (Compressed Natural Gas) •Fuel Pump •Injectors •Carburetor •Fuel Tank / Lines •Fuel Filter