Premium Only Content

How does the combustion engine work?
The four-stroke internal combustion engine seen in today's cars and trucks is an elegant study in fluid mechanics.
Its centerpiece: a piston in a cylinder.
Each stroke of the piston accomplishes a different task.
First, a downstroke creates a partial vacuum that sucks in vaporized, fuel mixed with air.
Nest, an upward stroke compresses this mixture and, at the top, sets off the spark plug, which ignites the gases.
In what's referred to as the power stroke, the hot gases expand, pushing the piston down and transferring power to the crankshaft.
An exhaust valve opens, and the piston rises again, expelling the combusted air-and-fuel mixture.
A third stroke draws the fuel mixture into the cylinder, and a fourth compresses it to start the cycle again.
This process is sometimes called the Otto cycle, after Nicolaus Otto, the German inventor who built the first working four-stroke internal combustion engine in 1876.
-
LIVE
THOUGHTCAST With Jeff D.
1 hour ago $0.01 earnedSunday Night FORTNITE with THOUGHTCAST Jeff D & crew.
251 watching -
55:10
The Mel K Show
9 hours agoMel K & Mike L | The Tylenol Piece: It's a Marathon, Not a Sprint | 10-19-25
80.5K10 -
MrMoBetta13
3 hours agoCFB26 CUT Ranked + NEW NIGHTMARE CARDS and talking college football!!
8.36K2 -
LIVE
Spartan
5 hours agoOMiT Spartan | God of War Ragnarok and then Halo
82 watching -
3:19:39
FusedAegisTV
1 day agoλ Black Mesa λ (Half Life 1 Remake) █ Western Retread
14.2K1 -
40:22
MattMorseTV
4 hours ago $22.93 earned🔴They just tried it... AGAIN.🔴
22.1K51 -
2:08:52
Nerdrotic
5 hours ago $14.39 earnedUncovering Egypts Greatest Mysteries w/ Hugh Newman| Forbidden Frontier #121
100K9 -
2:25:58
vivafrei
12 hours agoEp. 287: Bolton INDICTED! Gaza Ceasefire BREACHED? Alex Jones Injustice Continues, ANTIFA & MORE!
111K135 -
16:16
Robbi On The Record
6 hours ago $5.66 earnedThe Dark History of Halloween | What You Should Know
25.2K13 -
LIVE
DHG
21 hours agoRE4R - BIORAND X3 ENEMY MULTIPLIER MOD - PROFESSIONAL
148 watching