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'''Overview of boostcontrol''' * Configuration: GenBoard/Manual/Config/BoostControl * Testing: GenBoard/Manual/Testing/BoostControl '''Typical Pneumatic connections''' * http://www.autronic.com/technical_data_files/BoostValveInternal.pdf * http://www.autronic.com/technical_data_files/BoostValveExternal.pdf For both installs, activating the solenoid raises resulting boost. We need to control PWM-duty to get to boost target. Raised duty = raised pressure. An install where raised solenoid duty is needed to (open wastegate and) lower boost is just dangerous. Firmware supports it, of course, but avoid it. ---- '''Boost control system layout:''' Primary system for internal wastgate: * adjustable leak valve between the turbo compressor housing (or after IC to compensate for pressure drop over IC.) and node A * Bottom chamber of wastegate connected to node A * Solenoid from node A that in it's rest position is blocked and in it's activated position is open to atmosphere Primary system for external wastgate: * Wastegate bottom chamber connected to compressor housing (or after intercooler to compensate for pressure drop over intercooler) * Solenoid from the top chamber of the wastegate, switched to either atmosphere (rest state) or directly to compressor housing. Or to bottom chamber if you are lazy and don't want long pressure lines and don't plan on ever using the extended range system below. Improved spoolup and range for external wastegate: * Primary system for internal wastegate connected to the bottom chamber. * Primary system for external wastegate connected to the top chamber. The systems are sequenced, first pressure is applied to the top chamber but if that is not enough (remember EBP pushing on the wastegate valve) the boost control working on the lower chamber will start to bleed off boost. In addition to this the system acting on the bottom chamber is always bleeding off as much boost as possible until the system is getting over the adjustable 'spoolup' threshold. Note that the atmosphere connection can be replaced with a vacuum connection. A vacuum reservoir will NOT work, it has to be a fairly high capacity vacuum pump. (If a zero break pressure check valve is found and used (never seen one) to atmosphere a vaccum reservoir can be used.) -Jörgen ---- '''See also''' * GenBoard/Manual/Config/BoostControl - config variables * GenBoard/Manual * GenBoard/Manual/Config * GenBoard/Manual/PneumaticTube * InTake/VariableIntake (same type of small solenoid air valve) * BoostController is the old, developer and brainstorming page
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