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Desmodromic valve

Imagine a super-strong engine part that opens and closes like a tiny door, but without any springs!

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Desmodromic valve

Desmodromic valve

wikipedia
15.b. 33,000km odometer, 240kph max speed, redline @ 9,000rpm
THE MONDIAL MOTORCYCLE. ITALY.
21.c. 1998 Bimota DB4 900cc 90°Twin Cylinder, top speed 212km-hr
DUCATI 750cc SPORT. 1973 ITALY.
15.c. 1991 Ducati 900SS 33,000km odometer, 240kph max speed, redline @ 9,000rpm
21.a. 1998 Bimota DB4 900cc 90°Twin Cylinder, top speed 212km-hr
THE DUCATI 996. MOTORCYCLE.
DUCATI 999
18.j. Ducati ST3S 992cc & Owner (also part of Honda CBR1100 Super Blackbird owner/riders
21.d. 1998 Bimota DB4 900cc 90°Twin Cylinder, top speed 212km-hr
DUCATI 200 SS (SUPER SPORTS) .

Key Facts

Mechanism Type
Positively closed poppet valve.
How It Closes
Uses a cam and leverage system, not a spring.
Key Feature
Has separate mechanisms for opening and closing.
Common Use
High-performance engines like race cars and motorcycles.
Fun Fact
The word 'desmodromic' comes from Greek words meaning 'controlled by a lever'.

What's a Desmodromic Valve?

Have you ever seen a door that slams shut all by itself? A desmodromic valve is kind of like that, but for engines! In most car engines, little springs help close tiny doors called valves.

These valves let air and fuel into the engine and let out smoky exhaust. But a desmodromic valve is special because it uses clever levers and cams, like a tiny mechanical arm, to open and close the valve. It's like having a helper that makes sure the door is always shut tight, no matter what!

How Does This Clever Contraption Work?

Think about how you push a swing. You push it to make it go, and it swings back on its own. A regular engine valve is like that swing, with a spring helping it come back.

But a desmodromic valve is different! It has two special parts, like two different pushes, to open it and then another one to close it. It's like having someone to push the swing to go forward and then someone else to pull it back.

This makes it super reliable and strong, so it always works perfectly.

Why Are These Valves So Cool?

These special valves are super important because they can work really, really fast! Imagine trying to open and close a door thousands of times every minute. A regular spring might get tired, but a desmodromic valve is built to handle it.

This means engines with these valves can go faster and perform better. They are often used in super-fast race cars and motorcycles where every little bit of speed counts. It's like having a superhero part for an engine!

Where Do We Find These Amazing Parts?

You won't find desmodromic valves in every car you see. They are usually found in high-performance machines where speed and power are super important. Think of fancy sports cars that zoom around a race track or powerful motorcycles that riders take on exciting adventures.

These engines are built with extra care, and desmodromic valves are a part of that special design. They help these machines perform at their very best, making them exciting to watch and ride.

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Based on content from Wikipedia · Licensed under CC BY-SA 4.0