The future fuel efficiency numbers put forth by the EPA had me scratching my head. I was figuring the easy button would be to produce a percentage of pure electric vehicles to meet the numbers, but it seems like there is a lot of research going on behind the scenes to stretch those MPG figures as far as they can go.
http://www.thetruthaboutcars.com/2016/08/h2oh-yeah-boschs-power-boosting-water-injection-system-now-available-automakers/
Lots more than that is going on.
But some would also think it's not enough research... 
Not exactly a new idea. 
Alpha, I figured it was a pretty well funded area, but those outside of the field probably don't hear so much.
Water injection really intrigues me. Both for the power and the efficiency aspects.
The diesel truck I am going to be buying has a "meth" injection setup on it. It guess it should really be called a "menth" injection, as it uses the menthol on the washer fluid.
How is it setup is it has a second pump in the washer fluid tank, and when the "extra power" switch is turned on, once it hits 25psi of boost it starts pumping that into the intake, both cooling it down and helping it have a better burn. He says you can use just water and it will just help cool things down.
I'm not sure how much the idea has to change for gas engines, or if it only makes sense on boosted engines.
Very intriguing though.
I am really intrigued by the six stroke engines that use water vaporization as a separate "combustion" cycle. I wonder if that's every going to hit the mainstream? Seems like an awesome idea. Uses tons of waste heat. I also wonder if you could go so far as to eliminate the radiator and whole cooling system with the right volume of water injected. Obviously the engine would have to shut down if it was out of water in the tank, then.
I'm guessing there were issues with it as the patent application was apparently abandoned.
https://en.wikipedia.org/wiki/Six-stroke_engine#Crower_six-stroke_engine
Brett_Murphy wrote: Alpha, I figured it was a pretty well funded area, but those outside of the field probably don't hear so much.
There are some really odd ideas that would make many "conventional" engine people shake their heads. But the ideas appear to work quite well. Then there are a lot of rehash ideas with small twists on them. Maybe they can work better with better controls.
But, like has been mentioned in the efficiency thread- getting it all balanced is the real key. So that the consumer sees some real benefits.
AWSX1686 wrote: Water injection really intrigues me. Both for the power and the efficiency aspects. The diesel truck I am going to be buying has a "meth" injection setup on it. It guess it should really be called a "menth" injection, as it uses the menthol on the washer fluid.
No, it's meth. As in METHANOL which is an ingredient in washer fluid. MENTHOL on the other hand is a cigarette flavour. I don't know how well it works in a diesel, but it is very effective in my friends MR2 Spider with a Rotrex.
Use a small 12v to 110vac inverter to power an espresso machine boiler feed pump to supply high pressure water/methanol mix to fogging nozzles in the intake.
I wonder if this will solve the DI intake coking problems?
In reply to bentwrench: It should
doc_speeder wrote:AWSX1686 wrote: Water injection really intrigues me. Both for the power and the efficiency aspects. The diesel truck I am going to be buying has a "meth" injection setup on it. It guess it should really be called a "menth" injection, as it uses the menthol on the washer fluid.No, it's meth. As in METHANOL which is an ingredient in washer fluid. MENTHOL on the other hand is a cigarette flavour. I don't know how well it works in a diesel, but it is very effective in my friends MR2 Spider with a Rotrex.
Gotcha. Meth injection.
Oh it's quite effective. If you have it turned off, punch it and turn it on as you're going you feel a kick in the back! :)
Planning on meth injection for my Z build. Guess its the same principle
WWII planes were no strangers to water/meth. Tons of research was done 60+ years ago. The US had "War Emergency Power" (temporary higher boost and water injection) and the German's crappy fuel was supplemented with MW-50 (50:50 water meth) injection to crank the boost up.
Sometimes it seems like we're just catching up to where we left off on piston engine technology, we just use more electronics to do it now.
The Messerschmitt BF109 had a 4-valve SOHC dry sumped engine with direct injection and hydraulically controlled supercharger(s) sprayed with water/meth and N20 injection. 
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