Diesel Engines Flashcards
Difference between petrol and diesel engines
Petrol - mix of fuel and air, ignites with a spark
Diesel - takes in air, compresses it, and injects fuel into it
Heat of compressed air ignites it
Applications of a diesel engine
Diesel Generators
Main generators and motor boats
Air compressors
Fire pumps
What are diesel generators?
Diesel engines are prime movers for diesel generators
Engine connected via drive shaft
Engine drives generator which generates electrical power
Engine Numbering
Generator. B block
Drive propellers. Flywheel. Diesel engine. Free en
End. Gearbox. A block
What is an engine block?
Holds and supports all other engine components
Contains crankshaft, cylinder liners, mountings for aux cooling and lubricants systems
Cylinder / Cylinder Block
Cylinder guides piston to dissipate surplus heat
Cylinder blocks contain cylinders and support Cylinder heads
Cylinder Numbering
Inline
Free end 1 2 3 4
V engine
- 4
- 3
- 2
- 1
A. B
Flywheel
What is a cylinder head?
Closes off cylinder at the top
Contains intake/exhaust parts
Contains valves and valve gears
What is a cylinder head joint?
Makes water/air/gas tight seal between cylinder block/head
What is a sump?
Reservoir for lubricants oil from bearings, and rocker gears
What is a piston?
Reciprocates inside cylinder
Enables compression to receive pressure forces from combustion of air
Transfers them via gudgeon pin, connecting rod to crankshaft
What is a piston ring?
Provides sliding seal between inner and outer edges of the cylinder
3 rings per piston
2 compression for sealing
1 oil control ring to prevent oil rising past the piston
What is a connecting rod?
Connects piston to crankshaft
Holds gudgeon pin
What is a gudgeon pin?
Connects piston to connecting rod
Transmits load from piston to conrod
What is a crankshaft?
Changes reciprocating motion into rotary motion
Contains oil drilling to allow lubricants to get to bearings
