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Originally Posted by simple
Currently looking in to how to drive HSV. Probably will test varying pump speed with conjunction with HSV. Calculation for water delivery will be a nightmare but this is a software guy problem
By the way, Richard, ?peak and hold? drive principle is not suitable as HSV has high resistance. Do you supply them with 3-4Ohm coils suitable for ?peak and hold? ? |
I would not recommend vary the pressure of pump the AS WELL AS varying the duty cycle of the HSV. The only time when you want to vary the speed/pressure of the pump is to compensate the manifold/water pressure differential.
Life would be a great deal simplier if you deal with a valve-PWM system rather then pump-PWM system. As the early chart show, the relationship between the pump speed and flow in not linear at all. It will definately a nighmere to map/tune the water flow with some consistancey fuel flow. I based on the assumption that the purpose of water is the replace the necessarity of running an over-rich fuel mix and result in better power, cooler potential.
Richard