Power Transfer Review

Small engines convert __________ from the combustion of fuel into mechanical energy.

• Phyiscal Energy

• Heat energy

• Compressed Air

• Kinetic energy

True or False? Engine shaft orientation is based on the axis of the crankshaft as horizontal or vertical.

• True
• False

The valves are opened by the lobes on the ________?

• Crankshaft
• Camshaft
• Tappets
• Timing Gear

Power is transferred from the PISTON PIN > CONNECTING ROD > CONNECTING ROD CAP > _______________

• Crankshaft
• Valve Spring
• Dipstick
• Cam Lobe
• Valves (Intake/Exhaust)

Power is transferred from the CRANKCASE COVER > CYLINDER HEAD > _______________

• Piston
• Valve Spring
• Dipstick
• Cam Lobe
• Valves (Intake/Exhaust)

Power is transferred from the CAM LOBE > _______________ > VALVE SPRING RETAINER

• Tappet
• Valve Spring
• Dipstick
• Cam Lobe
• Valves (Intake/Exhaust)

List the 4 Strokes of Compression, or otherwise known as the 4 Stroke Theory of a small gas engine.

• Exhaust

• Compression

• Intake

• Power/Ignition

Indicate what direction the piston is traveling at each stroke.

Groups:

(a) Top Dead Center (TDC)

,

(b) Bottom Dead Center (BDC)

• Exhaust

• Power/Ignition

• Compression

• Intake

Match the compression stroke to the position of the Intake Valve.

• Closed #1

• Exhaust

• Closed #2

• Intake

• Open

• Power/Ignition

• Closed #3

• Compression

Match the compression stroke to the position of the Exhaust Valve.

• Closed #3

• Power/Ignition

• Open

• Intake

• Closed #2

• Compression

• Closed #1

• Exhaust