mechanical arrangement piston engines the main bits and pieces that make up the piston engine
TRANSCRIPT
Mechanical ArrangementMechanical Arrangement
Piston EnginesPiston Engines
The main bits and pieces that make up the piston engineThe main bits and pieces that make up the piston engine
Mechanical Arrangement - BasicsMechanical Arrangement - Basics
Mechanical Arrangement - BasicsMechanical Arrangement - Basics
A
B
Hand force in direction ‘A’ gives rotational
force on nut
Leg force in direction ‘B’ gives rotational
force on pedal/crank propels bicycle along
Mechanical Arrangement - BasicsMechanical Arrangement - Basics
Cylinder
Piston
Connecting Rod
Crank Shaft
‘Big-end’
Gudgeon Pin Main
Bearings
Offset Bearing
Counter Balance Weight
Mechanical Arrangement - BasicsMechanical Arrangement - Basics
11
2233
44Pistons
Crankshaft
Rear
Front
Flywheel attachment
flange
Timing Belt and Water Pump
driving pulley location
Main Bearings
Mechanical Arrangement – Main PartsMechanical Arrangement – Main Parts
Sump (Oil Tank)
‘Rocker Box’ Cover
Cylinder Block
Flywheel
Valve Gear
Crankshaft and Pistons
Exploded View of the Engine
Cylinder Head Assembly
Timing Shaft
Mechanical Arrangement – Valve GearMechanical Arrangement – Valve Gear
Valve Operation
The Inlet Valve needs to be open to allow fuel/air mixture
in
The Exhaust Valve needs to be open to allow burnt gases
out
Inlet Valve Exhaust Valve
Mechanical Arrangement – Valve GearMechanical Arrangement – Valve Gear
Rocker
Rocker Shaft
Closing spring
Valve Seat
Push Rod
Cam Shaft
Inlet Valve Closed Inlet Valve Open
Valve Lift
Push Rod Mechanism
Overhead Cam -No Rocker
Overhead Cam and Rocker Push Rod
Mechanism
Mechanical Arrangement – Valve GearMechanical Arrangement – Valve Gear
Mechanical Arrangement – Valve GearMechanical Arrangement – Valve Gear
Modern Engines use a toothed rubber belt to drive the cam shafts
Cam Drive Mechanism
Crankshaft and
Pistons
Twin Cam System
Chain Tensioners
Put it all together
Mechanical ArrangementMechanical Arrangement
How does it work?