Who invented desmodromic valve system?
Fabio Taglioni
In 1956, Fabio Taglioni, a Ducati engineer, developed a desmodromic valve system for the Ducati 125 Grand Prix, creating the Ducati 125 Desmo. He was quoted to say: The specific purpose of the desmodromic system is to force the valves to comply with the timing diagram as consistently as possible.
Does Ducati still use desmodromic valves?
The Ducati 1199 Panigale, for example, had chain-driven cams and still had desmodromic valves. So did its smaller sibling the 899 Panigale. They kept this in the 1299 Panigale, and then in the Ducati Panigale V4. Meanwhile, many other motorcycles in the Ducati line-up still use belts.
What is desmodromic distribution?
Desmo is short for desmodromic, and it refers to the way that a poppet valve inside of an engine is controlled. In almost every four-stroke piston engine, the valves are opened via a camshaft and closed by spring pressure which comes from a valve spring. It’s a well-known system, it works, and it’s pretty simple.
Is the Ducati V4 desmodromic?
The Ducati Panigale V4 is a sport bike with a 1,103 cc (67.3 cu in) desmodromic 90° V4 engine introduced by Ducati in 2018 as the successor to the V-twin engined 1299.
What does desmo service include?
Desmo Service: it includes over 20 different checks and adjustments listed in the Check List of the Maintenance operations, including engine oil and oil filter change and valve clearance check and/or adjustment. It includes the Oil Service or Annual Service operations.
Is the Ducati superleggera V4 street legal?
The Superleggera V4 is powered by a 998cc engine that develops 224hp in the street-legal trim. Fitting the Akrapovic track exhaust liberates an additional 10hp, taking the total output to 234hp! You can read more about the Superleggera V4 here.
When was the desmodromic valve system first invented?
Fully controlled valve movement was conceived during the earliest days of engine development, but devising a system that worked reliably and was not overly complex took a long time. Desmodromic valve systems are first mentioned in patents in 1896 by Gustav Mees.
How is a desmodromic valve in a Ducati engine?
Desmodromic valve. Jump to navigation Jump to search. Desmodromic poppet valve in Ducati engine. A desmodromic valve is a reciprocating engine poppet valve that is positively closed by a cam and leverage system, rather than by a more conventional spring.
Where does the word desmodromic come from in an engine?
In a conventional four-stroke engine valves are opened by a cam and closed by return spring. An engine using desmodromic valves has two cams and two actuators, each for positive opening and closing without a return spring. The word comes from the Greek words desmos ( δεσμός, translated as “bond” or “knot”) and dromos ( δρόμος, “track” or “way”).
When did Maserati introduce the desmodromic valve system?
In 1959, the Maserati brothers introduced one of their final designs: a desmodromic four-cylinder, 2000cc engine for their last O.S.C.A. Barchetta. In modern engines, valve spring failure at high RPM has been mostly remedied. The main benefit of the desmodromic system is the prevention of valve float at high rpm.
