jaapv said:Yes - nothing new there, the VTech box is well known on the forum. A nice bargain for the first member to bid.
I have a different experience. I noted 9% less fuel consumption when driving long range, 1100kms + 1100kms, during hunting season. I drive each leg in one go during the same day, only pit stops for refueling incl food/coffe. I have fuel up data from the same pumps and it seems that the weather conditions were similar re winds last year and the year before. With these long range drives my driving pattern is similar. I'd guess it is about 50% cruise control and 50% manual drive. I was a bit surprised over the reduction of ICE fuel consumption after installation of the PHEV box.anko said:I am pretty sure this box will not give you more range (or better fuel economy) than a decent driving style does.
Besides the throttle reprogramming I noted number 1. above when driving long range.Why Outlander PHEV gasoline consumption is lower with PHEV Box?
I have following observation: beside of fuel savings that come from stopping ICE from heating or reducing this behaviour, I see, that during typical long journey noticeable fuel savings (10% or so) are visible. As this is kinda of side effect for me (nice side effect, huh), I tried to find, why PHEV Box causes gasoline savings. It seems that there are two sources of this effect, but I cannot find real proportions:
1. PHEV Box causes car to run with parallel mode even with full throttle starting from 68 km/h (orange arrow, ICE powers wheels directly), there is no need to do two energy conversions typical for serial mode (blue arrow) – from ICE to electrical energy, and then – from electrical energy to mechanical energy at EV motors. These conversions are not 100% efficient (we can assume they are 90% efficient or so). Such two conversions cause serial mode to be about 20% less efficient than parallel mode for same traction power demand.
2. Car bases on sophisticated, predictive algorythm of charging via ICE, dynamic changes of current sunk from battery force it to start ICE more frequently. Driving with PHEV Box reduces noticeably need for quick, short ICE starts, and car looks more for charging in parallel mode (kind of self-learning intelligence is visible in behaviour of the car). Less ICE starts and focusing on parallel side-charging must be a source of fuel savings.
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