AMT 212 WEEK 1 PPT 1

Question 1

Piston Engine fundamentals

Answer 1

1. Mechanical, Thermal, and Volumetric Efficiencies
2. Operating principles:

Rotary, Diesel, 2 Stroke, 4 Stroke

3. Piston displacement and Compression ratio
4. Engine configuration and firing order

Question 2

What are the Engine Requirements:

Answer 2

• Lightweight
• Reliable
• Durable
• Flexible
• Balance
• Weight per horsepower

Question 3

What is a reciprocating engine?

Answer 3

A reciprocating engine
Is a type of internal
combustion engine that
derives its name from the
back-and-forth movement,
or reciprocating
movement of the pistons.

Question 4

Operating principles

Answer 4

An internal combustion
engine is a device for
converting Heat energy
into mechanical energy

Question 5

Basic parts of an Internal Combustion Engine

Answer 5

• Cylinder
• Intake/Exhaust Valve
• Connecting rod
• Piston
• Crankshaft
• Spark plug

Question 6

It forms a part of
the chamber in which the
fuel and air mixture is
compressed and burned.

Answer 6

Cylinder

Question 7

An _____ is needed to
let the fuel / air mixture go
inside the cylinder

Answer 7

Intake Valve

Question 8

An _______ is needed to
let the burned fuel / air
mixture or exhaust gassed go
out from the cylinder.

Answer 8

Exhaust Valve

Question 9

It is the component that
connects the piston and the
crankshaft.
Transfers the power from the
piston to the crankshaft.

Answer 9

Connecting rod

Question 10

forms like a moving wall
inside the cylinder that moves up and
down or in reciprocating motion.
The purpose of the piston is to transfer
force from expanding gas in the
cylinder to the crankshaft via a
connecting rod.

Answer 10

Piston

Question 11

is a rotating
shaft that converts
reciprocating motion of the
pistons into rotational
motion.

Answer 11

Crankshaft

Question 12

is a device used for
delivering electric current from an
ignition system to the combustion
chamber of a spark-ignition engine to
ignite the compressed fuel/air mixture
by an electric spark

Answer 12

Sparkplug

Question 13

Operating Cycles

Answer 13

• Rotary
• Diesel
• 2 Stroke
• 4 Stroke

Question 14

What is the four stroke cycle

Answer 14

• Intake/Induction
• Compression
• Power/Combustion
• Exhaust

Question 15

Piston moves down to BDC
( bottom dead center) by
the rotation of the
crankshaft, it draws air and
fuel into the cylinder
through the intake port.

Answer 15

Induction/Intake Stroke

Question 16

The piston moves up to TDC
(top dead center),
compressing the air and
fuel mixture.

Answer 16

Compression Stroke

Question 17

As the piston travels
through TDC (top dead
center) in the compression
stroke the spark plug
ignites the fuel and air
mixture, forcing the piston
down.

Answer 17

Combustion/Power stroke

Question 18

As the piston moves
upward again from BDC (
bottom dead center) it
forces the burnt air and fuel
mixture out of the exhaust
port.

Answer 18

Exhaust Stroke