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There are a few different places to source reference pressure, usually the best is at the compressor since its has the quickest response time. You'll be 'cracking open' the wastegate really quickly (lowering the chance of spiking and such), but you'll have a softer response from the turbo. Electronic boost control using the compressor boost reference is probably the best way to manage boost pressures, though there are pressure changes (temperature related) in the charge cooler and into the intake manifold that may cause erratic power output as the charge cooler heat soaks and the temperature of the air entering the intake manifold rises. I would not recommend putting it on the intake manifold, wastegate actuators are not meant to take vacuum at all, and would likely have some sort of erratic spiking as you transition from manifold vacuum to pressure as the wastegate diaphram and line has to go from vacuum, pass atmospheric pressure, and then be at positive pressure, where feedback regulation occurs.
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Oct 3, 2014 17:37
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| # ¿ May 13, 2024 13:26 |
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