3B Scientific Four-Stroke Engine User Manual

3B SCIENTIFIC

Four-Stroke Engine, Transparent 1002995

Instruction sheet

04/12 JS

®

PHYSICS

1 Outlet
2 Spark plug
3 Inlet
4 Piston
5 Combustion chamber
6 Valve control
7 Crank shaft

1. Description

A four-stroke engine (or Otto engine) is a kind of
internal combustion engine which requires four
strokes to operate, whereby the combustible
mixture of air and fuel is ignited by a spark plug.

The crankshaft conveys the force and also con­trols the changes in the gas mixture.

Fig. 1: Working strokes of four-stroke engine

(from left to right):
Intake, compression, ignition (power), exhaust

2. Operation

Additionally recommended:

Overhead Projector (230 V, 50/60 Hz) 1003264
or
Overhead Projector (115 V, 50/60 Hz) 1003263

• Lay the transparency on the daylight projec-

tor.

• Move the components by hand to the places

which correspond to the various strokes.

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Subject to technical amendments

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