Quote:
Originally Posted by akumabito
...
Are there any workarounds to the clutch bearing issue?
|
Yes, and it is appropriately complicated.
You need to add solenoids that can put your transmission in any gear or in neutral (reliably) or just focus on top gear for now.
You also need a vehicle speed sensor
And you need an rpm signal
And you need to know the RPM to MPH ratio for each gear you want to automate.
And you need to have a way to control the throttle (of course) by automation.
And you need to have a way to kill the engine by automation.
And you need to have a way to start the engine by automation.
And you might want to have a reading on manifold pressure.
However, unless you are at a complete stop, you do not need to do anything with the clutch.
So to initiate a glide, your robo-shifter would:
"unload" the engine so it could slip the transmission into neutral, i.e.
a. if the engine is providing torque then kill it and while there is slack in the driveline slip it into neutral.
b. if the engine is in overrun (high vacuum) then give it some gas to load it, then kill it and slip into neutral.
c. ensure engine is killed.
To initiate a pulse, your robo-shifter would:
a. start the engine
b. examine vehicle speed
c. determine appropriate gear selection
d. bring engine rpm up to the precise speed needed to slip the transmission into the next gear.
e. start accelerating at most efficient rate.
And of course you want to think about how much pressure your robo-shifter should apply and when, perhaps with pressure feedback, and expect many experiments (broken bits) while you get it perfected. It also will work better with more vss (vehicle speed sensor) pulses per revolution, i.e. perhaps an ABS sensor might be a good choice.