Gen Board/Manual/Electronically Controlled Pneumatic Valve

GenBoard/Manual/ElectronicallyControlledPneumaticValve (2013-02-05 22:04:37)

Solenoid

for

[High flow-capacity boostcontrol valve]:

Advantages:

High flowrate
rated from VAC to 120 psi (8.2 bar !)

Disadvantage: slightly higher cost

Fitting information

Below the correct ways are shown from the MAC Valve catalog

Scenarios

External wastegate controlling bottom : 3way normally open

1 : Bottom

2 : Vent

3 : Source

External wastegate controlling top :

1 : Source

2 : Vent

3 : Top

Traditional (lower cost) pneumatic valve.

Used in Audi-s, BMW ad VWs for similar purpose.

Should NOT be used beyond 3 bar boost (400 kPa absolute). Actually, above 2 bar boost (300 kPa absolute), or for large wastegate actuators, the above [High flow-capacity boostcontrol valve] is recommended.

Resistance: R=appr. 30 Ohm ( 14.7V / R < 500 mA max).

electronic driving:

using a free injector channel recommended: Flyback is needed.
power-IGBT ignition output is an option
alternatively stepper output can be used
not recommended: if there is no free injector, ignition and stepper output channel in your app, the TPIC6A259 (nickname: p259) chip can theoretically drive it (TPIC6A259 is rated to 350mA if all channels are loaded continuously: otherwise it can bear max 1A on one channel). In practice, it's a bad idea.
- Using a flyback diode is required when driving inductive load (eg. BoostControl solenoid).
- again, p259 output is not recommended for any boostcontrol solenoid or any inductive load ! (p259 outputs only recommended for LEDs, small lights, or signalling tach-output or logic-level signal to some other controller or driving high-side P-FET drivers, as in the double-vanos camshaft-control application).

A similar solenoid with a different connector:

R=25.1 Ohm

I like this solenoid a lot, but where can we get connectors ?

2x 4mm dia male 7mm between centers
center aligning pin is also 4 mm dia, but 6 mm (between centers) from both conducting pins

Used in all Mercedes families (including E and S classes) and some Daewoo.

See also:

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