The transmission I am working on will need a variable valve for each of the clutches/bands the trans uses in combo to achieve 1st, 2nd, Direct and Reverse. I want to keep the standard shift pattern of PRND21 you find in most vehicles. This would make it easier for someone to use this trans in an automatic conversion.
The Hydraulic pump is a variable displacement unit that will also be used for the power steering and power brakes. The pump will be set up for on demand use and be fed through a hydraulic accumulator so it will not run all the time.
The transmission will use four valves that will be controlled with servos so they can be opened and closed at a variable rate. I.E. if you apply throttle slowly the shifts will slide into place in a smooth manor. When in "Grand Prix" mode, the trans will shift firm and fast for those times when a little Whoop A**
is needed to show an ICE that an electric may be a bit short on range but it will get there hell and gone faster than YOU!
The pump will have one servo to control pump displacement and a set of Fet's to control the motor RPM/Amps.
I first got the build my own EV bug about 4 years ago and I decided early what I wanted to build. I live next door to a guy who has been doing EV conversions for years now and started talking to him about what I wanted to try and have been working to those ends since. I have seen many different builds that have a separate motor for the vacuum pump the power steering pump and the *cough* Air Conditioning… I am not sure why you need AC in Washington but oh well. So I am using one motor instead of three.
Also most of the cars were standard trans models that the owners told me they only use a couple gears of so that got me thinking.
In the schematic the drive section is separated from the logic section by an optoisolator correct? If so then could I place U6 and U7 with supporting components in the drive section box and run a separate 12 volt supply to them and then drive the optoisolator from the logic section in the controller box via CAT5?
Take Care Ya"ll
Cyrus