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  2. Swirl flap - Wikipedia

    en.wikipedia.org/wiki/Swirl_flap

    Swirl flap principle in a four-valve engine. A swirl flap is a small butterfly valve fitted to four-stroke internal combustion engines with at least two intake valves.It is installed inside or just before one of a cylinder's two intake ports, allowing to throttle its intake port's air flow, causing a swirl in the other intake port not fitted with a swirl flap.

  3. Pilot-operated relief valve - Wikipedia

    en.wikipedia.org/wiki/Pilot-operated_relief_valve

    A separate actuator on the piping releases pressure in the line if it crosses a threshold. This releases the pressure on the back of the seal, causing the valve to open. The essential parts of a PORV are a pilot valve (or control pilot), a main valve, a pilot tube, the dome, a disc or piston, and a seat. The volume above the piston is called ...

  4. Toyota G16E engine - Wikipedia

    en.wikipedia.org/wiki/Toyota_G16E_engine

    The G16E-GTS is a turbocharged engine model with 10.5:1 compression ratio and D-4ST direct/port injection system with multi-oil jet piston cooling, large-diameter exhaust valves and a part-machined intake port. The turbo boost is set between 1.4 and 1.81 bar (20.3 and 26.3 psi).

  5. Viktor Zolotov - Wikipedia

    en.wikipedia.org/wiki/Viktor_Zolotov

    Viktor Vasilyevich Zolotov (Russian: Ви́ктор Васи́льевич Зо́лотов; born 27 January 1954) is a Russian military officer who is the Director of the National Guard (Rosgvardiya) and a member of the Security Council.

  6. Vanna–Volga pricing - Wikipedia

    en.wikipedia.org/wiki/Vanna–Volga_pricing

    The rationale behind the above formulation of the Vanna-Volga price is that one can extract the smile cost of an exotic option by measuring the smile cost of a portfolio designed to hedge its Vanna and Volga risks. The reason why one chooses the strategies BF and RR to do this is because they are liquid FX instruments and they carry mainly ...

  7. Iron butterfly (options strategy) - Wikipedia

    en.wikipedia.org/wiki/Iron_butterfly_(options...

    A long iron butterfly will attain maximum losses when the stock price falls at or below the lower strike price of the put or rises above or equal to the higher strike of the call purchased. The difference in strike price between the calls or puts subtracted by the premium received when entering the trade is the maximum loss accepted.