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  2. Mechanism of diving regulators - Wikipedia

    en.wikipedia.org/wiki/Mechanism_of_diving_regulators

    A Dräger two-stage twin-hose regulator Beuchat "Souplair" single stage twin hose regulator Twin 7l cylinders with Draeger harness, valves, manifold and regulator from c. 1965 Duckbill exhaust valve for Draeger twin hose regulator. The "twin", "double" or "two" hose configuration of scuba demand valve was the first in general use. [16]

  3. 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.

  4. Pressure regulator - Wikipedia

    en.wikipedia.org/wiki/Pressure_regulator

    A back-pressure regulator, back-pressure valve, pressure sustaining valve or pressure sustaining regulator is a control valve that maintains the set pressure at its inlet side by opening to allow flow when the inlet pressure exceeds the set value.

  5. Pneumatic circuit - Wikipedia

    en.wikipedia.org/wiki/Pneumatic_circuit

    The normally closed valves will not permit flow from the inlet port of the valve to the outlet port, normally the flow will be permitted only by changing the position of the valve. In general, valves are designated as 2/2 DCV, 3/2 DCV, 5/2 DCV, 5/3 DCV etc., in which the first number indicates number of ports and second number indicates number ...

  6. Ball valve - Wikipedia

    en.wikipedia.org/wiki/Ball_valve

    In reduced bore (sometimes reduced port) ball valves, flow through the valve is one pipe size smaller than the valve's pipe size resulting in the flow area being smaller than the pipe. As the flow discharge remains constant and is equal to the area of flow (A) times velocity (V), A 1 V 1 = A 2 V 2 {\displaystyle A_{1}V_{1}=A_{2}V_{2}} the ...

  7. Variable valve timing - Wikipedia

    en.wikipedia.org/wiki/Variable_valve_timing

    Cylinder head of Honda K20Z3.This engine uses continuously variable timing for the inlet valves. Variable valve timing (VVT) is the process of altering the timing of a valve lift event in an internal combustion engine, and is often used to improve performance, fuel economy or emissions.

  8. Diode modelling - Wikipedia

    en.wikipedia.org/wiki/Diode_modelling

    When more accuracy is desired in modelling the diode's turn-on characteristic, the model can be enhanced by doubling-up the standard PWL-model. This model uses two piecewise-linear diodes in parallel, as a way to model a single diode more accurately. PWL Diode model with 2 branches. The top branch has a lower forward-voltage and a higher ...

  9. Camless piston engine - Wikipedia

    en.wikipedia.org/wiki/Camless_piston_engine

    Camless valve trains have long been investigated by several companies, including Renault, BMW, Fiat, Valeo, General Motors, Ricardo, Lotus Engineering who developed electro-hydraulic valve actuation in the late 1980s as a spinoff of their active suspension program (both utilised similar electro-hydraulic actuation and control), Ford, Jiangsu Gongda Power Technologies, and Koenigsegg's sister ...