The four stroke engine powers essentially all of today’s cars and trucks. But how? In the above image, the complexities of a working engine are broken down into four different actions, or strokes, that occur over and over at great speeds to keep a vehicle moving. While we can’t take credit for the genius of this great gif (a big thanks to a German animator who goes by the name UtzOnBike), we can take credit for the reference information below pertaining to each stroke—taken from A Dictionary of Mechanical Engineering, released digitally on Oxford Reference last week.
- Suction Stroke: The piston stroke that draws a fresh charge of air and, for a non-injected engine, fuel, into the cylinder of a piston engine.
- Compression Stroke: The stroke in a reciprocating compressor or engine during which the working fluid is compressed and ignited.
- Power Stroke: A piston is caused to move and deliver power by high-pressure combustion gases or steam.
- Exhaust Stroke: The piston or rotor forces the exhaust gases from the engineOxford Reference is the home of Oxford’s quality reference publishing, bringing together over 2 million entries, many of which are illustrated, into a single cross-searchable resource.
Image credit: Stroke Engine by UtzOnBike. Creative Commons License via Wikimedia Commons.
Imagine the engine power that would be required for this!
Goliath: World’s Largest Jet Engine Scores GE Aviation’s Largest Deal
GE Aviation received the largest order from an airline in its history for the GE9X, the world’s largest jet engine, at the Dubai Air Show on Sunday. A flock of 450 new GE9X engines, whose front fan is 11 feet in diameter, will power a fleet of next-generation Boeing 777X aircraft ordered by Emirates, Qatar Airways and Etihad Airways.
The total value of the deal, which also includes service agreements, is $26 billion (list price in U.S. dollars). Emirates alone agreed to purchase 300 GE9X engines, valued at $11 billion, making it the largest order from an airline in GE Aviation’s history.
The GE9X engine, which is still in development, builds on the legacy of the GE90, the world’s most powerful jet engine. The new engines will use advanced parts and materials like 3-D printed fuel nozzles, carbon composite fan blades and heat-resistant ceramic matrix composites inside the high-pressure turbine. The new technologies will make the engine lighter, quieter and more fuel efficient. They will also help reduce emissions.
More info on the big jet engine.
This week at the Dubai Air Show, GE Aviation received the largest order in its history for 450 of the new GE9x engines. With front fans 11-feet in diameter, the GE9x engines are the world’s largest jet engines and are currently still in development. They employ cutting-edge technology like 3-D printed fuel nozzles, carbon composite fan blades, and heat-resistant ceramic matrix composites inside the high-pressure turbine. The new technologies will make the engines lighter, quieter and more fuel efficient, and will also help reduce emissions.
Thats a big jet!
It’s a two-seat, rear-wheel-drive sports coupe built on an aluminum architecture and offers perfect 50:50 weight distribution. It measures 4,445mm long and 1,297mm tall (for reference, the new 911 measures 4,535mm in length). It’s also the smallest Jaguar built since 1954 and the XK120.
Now, the good part: it’s going into production. Soon. We’ll likely see the C-X16 at the end of 2012 with a naturally-aspirated V6, supercharged V6 and a hybrid. Diesel and V8 variants will probably follow, if you ask nicely…
See more deets and photos at TopGear.com
We love the diesel cars!