2) Application, advantage and disadvantage
Fill in what the application(s) of the various types of engine are and compare the engines with regard to their advantage(s) and disadvantage(s).
Types of engines |
Application(s) |
Advantage(s) |
Disadvantage(s) |
Slow-speed engine |
|
|
|
Medium-speed engine |
|
|
|
High-speed engine |
|
|
|
V-Engine |
|
|
|
In-line engine |
|
|
|
Trunk engine |
|
|
|
Crosshead engine |
|
|
|
Two-stroke engine |
|
|
|
Four-stroke engine |
|
|
|
3) Sequence of events
Indicate by means of the letters A/N the sequence of events in a two-stroke engine. Start with the letter A (Piston is in its BDC).
1 |
2 |
3 |
4 |
5 |
6 |
7 |
8 |
9 |
10 |
11 |
12 |
13 |
14 |
A |
|
|
|
|
K |
|
|
|
|
|
M |
|
|
A Piston is in its BDC.
B The exhaust gases are passed to the exhaust manifold.
C The crank is actuated.
D The camshaft actuates the push rod.
E The fuel/air mixture is ignited.
F Cylinder is filled with air.
G The reciprocating motion changes into a rotary motion.
H The rocking lever is actuated by the pushrod.
I Scavenging air removes exhaust gases.
J The piston goes up and compresses the air in the cylinder.
K The piston and connecting rod are pushed down.
L The crankshaft actuates the camshaft.
M The exhaust valves are opened.
N Fuel is admitted during the compression stroke.
4) Sequence of events
Indicate by means of the letters A / J the sequence of events in a four-stroke engine. Start with the letter A (Piston is in its TDC).
1 |
2 |
3 |
4 |
5 |
6 |
7 |
8 |
9 |
10 |
A |
|
|
|
|
|
|
|
|
|
A Piston is in its TDC.
B All the valves are closed; compression of the air in the cylinder.
C Piston removes the exhaust gases from the cylinder.
D Explosion forces the piston down.
E At the end of the compression stroke the atomiser sprays fuel through the nozzle.
F The cylinder is filled with air.
G Power stroke, during which the mixture is ignited.
H The inlet valve is opened during the air-induction stroke.
I Piston passes its BDC.
J Piston passes its BDC again.