Guest |350| Posted June 18, 2010 Report Share Posted June 18, 2010 Hi I’m thinking about making a multi-fuel car which runs on gasoline, E85 and LPG. This will require normal gasoline injectors and some low Z LPG-injectors + a LPG fuel pump. With E85 I would properly need extra fuel for cranking and extra fuel for sudden throttle opening (compared to gasoline mode). With LPG I don’t think that extra cranking- and warm-up fuel is needed(less or no enrichment compared to gasoline mode) because LPG will boil/vaporise immediately when it is injected – even when it is a very very cold-start. When switching to LPG-mode the LPG fuel pump has to prime for about 5 sec first. Then switch to LPG injectors(thinking about doing that with a Solid State relay because it is a 5cyl Audi engine) and then turn off the gasoline/E85 pump... And almost the same procedure when going back to gasoline or E85 mode. So... Is it possible to have: Switchable master-fuel, switchable injector setup, switchable cranking- and warm-up fuel enrichment, and the fuel pump prime + switching sequence? If not now.. What about in the future? yruwet 1 Quote Link to comment Share on other sites More sharing options...
rayhall Posted June 19, 2010 Report Share Posted June 19, 2010 Is it possible to have: Switchable master-fuel, switchable injector setup, switchable cranking- and warm-up fuel enrichment, and the fuel pump prime + switching sequence? If not now.. What about in the future? You can switch on a fuel overlay table and set the axis of this table to ECT. This would provide extra enrichment while the engine is warming up. To use a different fuel pump, you can use two Aux Output with conditions set to an external switch. The down side to this you would not have the prime feature and shut off on stall. It is not possible to do the other things, other then loading in another map each time you change fuel. The Vipec now supports FlexFuel sensors. This allows you to have automatic tune changes to suit 0 to 85% ethanol. Ray. Quote Link to comment Share on other sites More sharing options...
Guest |350| Posted June 19, 2010 Report Share Posted June 19, 2010 OK. Thank you. But do you think that switchable enrichment settings will be available in the future? Quote Link to comment Share on other sites More sharing options...
Guest |409| Posted June 22, 2010 Report Share Posted June 22, 2010 "The Vipec now supports FlexFuel sensors. This allows you to have automatic tune changes to suit 0 to 85% ethanol." Could you please explain this further, Ray? Does this work through the ECU blending a gas and E85 fuel map according to what a sensor says the ethanol content is? Thanks Anders Quote Link to comment Share on other sites More sharing options...
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