Aquamist VS Snow Performance
If your afr is correct then the water/alcohol will be correct - it spends its whole life tracking the fuel DC.
Last edited by Richard L; Feb 10, 2007 at 06:12 PM.
cij911,
The Aquamist progressive system uses an inline valve to control flow, almost identical to the fuel injector. The water pressure is static and set at 125psi.
The Aquamist pump's sole job is to keep the pressure constant regardless of flow, again similar to the fuel injection system except the water is recirculating within the pump instead of "back to tank" as in the fuel inejction system.
This is done by incorporating three 125psi by-pass valves between the inlet and exit port internally. This arrangement is a very effective way to regulate system pressure.
The video merely demonstrated the valve's responsiveness to an on/off command. It is not trying to demonstrate the progressive operation.
In order to be able to follow a progressive PWM signal faithfully, the inline valve must be able to open and shut within 2ms (1/500s). The video clearing shown the water spray was reacting well during the rapid-firing of the "on" pulses.
The nozzle on the right showed the response time of a valveless "progressive" pump speed system, widely used on a low cost WI system. It clearly shown it could not respond to the rapid-firing pulse trains. If the system is used to control fluid in the rapid throttle, RPM and Boost changes, it will not cope. This is due to the rotating inertia of pump motor, resisting speed changes. As a result, it will always lags behind a few tenths of a second. It might not seem much, but it is a life time for an engine spinning at 5,000rpm with rapid throttle and gear change.
I hope my explaination it is not too confusing.
The Aquamist progressive system uses an inline valve to control flow, almost identical to the fuel injector. The water pressure is static and set at 125psi.
The Aquamist pump's sole job is to keep the pressure constant regardless of flow, again similar to the fuel injection system except the water is recirculating within the pump instead of "back to tank" as in the fuel inejction system.
This is done by incorporating three 125psi by-pass valves between the inlet and exit port internally. This arrangement is a very effective way to regulate system pressure.
The video merely demonstrated the valve's responsiveness to an on/off command. It is not trying to demonstrate the progressive operation.
In order to be able to follow a progressive PWM signal faithfully, the inline valve must be able to open and shut within 2ms (1/500s). The video clearing shown the water spray was reacting well during the rapid-firing of the "on" pulses.
The nozzle on the right showed the response time of a valveless "progressive" pump speed system, widely used on a low cost WI system. It clearly shown it could not respond to the rapid-firing pulse trains. If the system is used to control fluid in the rapid throttle, RPM and Boost changes, it will not cope. This is due to the rotating inertia of pump motor, resisting speed changes. As a result, it will always lags behind a few tenths of a second. It might not seem much, but it is a life time for an engine spinning at 5,000rpm with rapid throttle and gear change.
I hope my explaination it is not too confusing.
.What does the Aquamist use as inputs to drive fueling? How does the system act like an injector to ensure consistent and varying fuel amounts based upon need? Does it use ECUload or variables that comprise (air volume, MAF hz, etc.) to determine the appropriate amount and how is this different than the Snow 2d setup? Thanks
The aquamist controller (FIA2) reads the fuel duty cycle waveform from the pulsed leg of a fuel injector.
The fuel injector's dc has every bit of information about RPM, load etc - this is the most direct way of referencing the water/methanol flow. You can use raw signals such MAP, MAF sensors and RPM to workout your final Water/methanol flow.
We have been using this signal since 2002 on our system2d water injection.
The fuel injector's dc has every bit of information about RPM, load etc - this is the most direct way of referencing the water/methanol flow. You can use raw signals such MAP, MAF sensors and RPM to workout your final Water/methanol flow.
We have been using this signal since 2002 on our system2d water injection.
Last edited by Richard L; Feb 10, 2007 at 06:58 PM.
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