water injection

[Roy]

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Hi allI think water injection on turbo engines offers to many benifits for it to be discarded, therefore I would say that it's worth the extra effort to make sure the system is fail safe.Hydrolocking is the biggest and most costly problem and the safest way of controling  the system would be with a microcontroller system rather than just a simple pressure switch.This way you could map the volume of water injection to engine needs and ensure certain parameters are met before allowing the system to function, ie is there water in the reservoir.If the system does not meet these parameters then no water would be injected and you could switch to a SAFE engine calibration that is not based upon the use of water injection to help control detonation.As for the system you have two basic choices, a pump or a pressurised reservoir.  I  like the idea of a pressurised reservoir but the volume injected will decrease as the bottle empties as the pressure will be falling.  You could use one of those 12 volt portable tyre pumps to maintain the reservoir pressure and a pressure switch to control the pump.A good pumped system is made by a company called aquamist here in the UK, www.aquamist.co.uk.To prevent hydrolocking try using a solenoid that vents the water injection pipe to atmosphere, this opens to drain the pipe before the engine is shut down and remains open so as no syphoning effects occur.Hope this helps                Roy ( Spectric's Ltd ) Aquamist.co.uk  


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Hi all

I think water injection on turbo engines offers to many benifits for it to be discarded, therefore I would say that it's worth the extra effort to make sure the system is fail safe.

Hydrolocking is the biggest and most costly problem and the safest way of controling  the system would be with a microcontroller system rather than just a simple pressure switch.

This way you could map the volume of water injection to engine needs and ensure certain parameters are met before allowing the system to function, ie is there water in the reservoir.

If the system does not meet these parameters then no water would be injected and you could switch to a SAFE engine calibration that is not based upon the use of water injection to help control detonation.

As for the system you have two basic choices, a pump or a pressurised reservoir.  I  like the idea of a pressurised reservoir but the volume injected will decrease as the bottle empties as the pressure will be falling.  You could use one of those 12 volt portable tyre pumps to maintain the reservoir pressure and a pressure switch to control the pump.

A good pumped system is made by a company called aquamist here in the UK, www.aquamist.co.uk.

To prevent hydrolocking try using a solenoid that vents the water injection pipe to atmosphere, this opens to drain the pipe before the engine is shut down and remains open so as no syphoning effects occur.

Hope this helps

                Roy ( Spectric's Ltd ) 



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