I have seen cheap torque wrench modules and I am thinking of taking the load cell out and adding a small instrumentation amp/wireless data/power circuit so it can be mounted on a spinning shaft. A real time data feed would probably have to be heavily filtered but it would be a good complement to the real time imep data. I have 100 amp 1 wire alternator turned by a belt to the engine. The alternator provides a uniform load over a range of speed. The load on the alternator would be controlled by the PIC. This along with input from the trigger disk sensor and duty cycle to the fuel injector valve allows negative feedback control of both the speed and load on the engine. Thinking of developing a cheap software electronics package for DIY engine test lab. I am thinking main customers would be some DIY guys but also mechanical engineering and technology departments at smaller schools.
I am not planning on measuring external engine torque initially. I will calculate indicated mean effective pressure (imep) in real-time to get the engine load variable. This is done by integrating the area within the curve of the indicator diagram. The indicator diagram requires a fairly accurate track of the crank position. Especially on a small engine, there will be enough fluctuation of rotation speed to require accurate tracking. An optical encoder would be one approach. The trigger disk and prox sensor is how it is typically done on most engines, though. It is cheaper, very rugged and reliable. There are a lot of thermodynamic calculations that can be done on indicator diagram data. The indicator diagram gives a good view of what is happening in the cylinder. I also plan to install a thermocouple in the exhaust and several RTD sensors on the engine block and cylinder head. I would like to try and do energy budget studies on HHO injection.
The experimental setup will be controlled by a PIC with USB laptop interface for data transfer. Spark angle and mixture ratio can be set by computer. I also have an Optrand fiber optic pressure sensor installed in the cylinder head and a 60 tooth trigger disk with variable reluctance sensor to track crank angle in order to do indicator diagrams. Carburetor will be replaced by electronically controlled fuel injector valve. Leaner mixtures seem to be better for HOD injection. Various fuels can be used tested.
Hi Peter will be in Colburg on the weekend at my daughters i think Pickering is close by if you would like to get together let me know i will bring along my two cells that i am working on ok later
Yes I am using ripstop nylon. I found some Joann Fabrics, but they did not know whether it was coated or not. It turned out to be coated, so I was not able to use it. I got some on line at Quest Outfitters in Sarasota FL.
I am about half through building a 4" square cell an I will post my results when I get to the testing part.
I would be glad to share my construction results. The main ideas were on Utube.
I still have several questions about using hydrogen only. How much gas is needed? Is it 1/2 the engine size such as with HHO or is it 1/3.
I read that you don't have to fool the computer like you do with HHO. Is this true?
And some other minor questions. I guess I will have to find out with testing.
I hope to find some others that are building separator cells to compare results.
I went through the building of HHO cells of several types and found that the "dry" cell type was the best. Now i can hardly wait to start testing the separator design.
I have several drawings of my new design and would be willing to share them with anyone that wants them. I will get them in a form that I can email soon.
I have a 2006 Miata MX5. I have installed a generator and a EFIE and after a lot of tweaking I have been able to get my gas mileage back to even. I have not gotten any mileage gains yet, I see flash units that claim to deal with the computer with custom maps. I have seen where some people say that they will not work. I have heard of some that just plug into the OBD II port but I have not been able to find any. I see other ones on ebay (see link below) that you wire into the harness behind the OBD II port. It seems to me that this should work however I have not found anyone that has used one and had success. I do not know very much about this but I want to find out. What is a PIC, I haven’t even heard that term before. I have a Harley with customized pipes and air cleaner and I have a unit on it that is programmable with custom maps to deal with the non stock system. The unit on my bike is quite large compared to the one on ebay and it only deals with a few adjustments I am sure a lot less than what is needed for my car.
Currently I have only addressed the front o2 sensor with the EFIE and I think I need to address the o2, MAP, MAF, and rear o2 sensor. Will a flash be able to address all of these (and any other sensor that may need to be addressed) to give me the MPG gains that I am wanting?
WARNING: THE DEVICES ON THIS WEBSITE CAN CAUSE PROPERTY DAMAGE AND POTENTIALLY CAUSE BODILY HARM OR EVEN DEATH. IF YOU ARE A MINOR STOP AND GET ADULT SUPERVISION. IF YOU ARE UNSURE ABOUT ANYTHING ASK SOMEONE WHO KNOWS THE ANSWER FIRST. THIS SITE IS HERE TO HELP PEOPLE BE SAFE, NOT TO ENCOURAGE RECKLESS BEHAVIOR. IF YOU DECIDE TO BUILD OR USE A DEVICE YOU SEE ON THIS WEBSITE OR ANY WEBSITE WE LINK TO YOU DO IT AT YOUR OWN RISK. PLEASE TAKE ALL SAFETY PRECAUTIONS. PLEASE READ THE TERMS OF SERVICE.