quote:Originally posted by No Quarter:
Thank you! The above input is appreciated.
So, if the ERK in fact does not reduce the total effort but only moves it from the initial part to the end part of pressing down the clutch, then I accept that the MC and therefore the slave moves the same amount. But I also read about one bracket maybe being reversed and that it needs adjustment to work right. Maybe Peter's is out of adjustment.
Personally I would prefer the least effort was required at the point of engagement, because that's where you sometimes have to make a slow and measured engagement, while at the start and end of the travel, it's just full force.
When I made that model a year ago, I was a little "broad" with my exactness. at that time I just wanted to know the basics of how it worked and a general ideal how it works.
from an academic objective, once I saw the design was a "quick take up" stroke followed by a ~70% reduced effort stroke,
1) I randomly chose a starting point for the initial setting of that b/c angle, where I compared the expected pedal travel of the non versus the ERK. It did show there was a need for a small increase in pedal stroke (no way near the amount if the total stroke was 70% reduced)
2) as you imply, it would be vary easy to adjust the linkage so that the "quick take up" is ommitted and only a 70% LONG pedal travel would be need. I would expect this would put the "pedal on the carpet" before the MC piston bottomed out at full stroke
for that first modeling, I did a lot of the simplification assumptions in my head as I wrote the excel to provide the graphs. when the comments about being able to reverse that toggle, I wanted to perform a comparison calculations. However that is when I noticed I am no longer able to reconize the needed math. I have not given up on making this comparison as I am now trying to see if I can use "canned equations" and a Math evaluation software to solve for me. this also causes me to question the exactness of my first solutions, so at this time I will state those results should not be considered the absolute, but just the general response
3) as for where in the clutch's operation the different efforts zones are located, that initial "quick take up" which actually increases the effort, the pedal effort will be the force required for that clutch operation zone. that initial clutch force need to remove the ToB not touching clearance would be very small, so the fact the ERK makes it harder makes no noticable differance to your leg.
4) The clutch operation zone where finding the point of first "grab" will be in the reduced effort zone, thus requiring more foot travel to provide a better control during a normal take off.
an observation I have made during the years of working with levers, links and hydrualics; the general population falls to the perseption that making a setting to a link is most importaint in getting the system back in operation, ie the instructions of set the link to 3.4". where my approach is that the provided length is just where I can put the device back together and then the length MUST be trimmed to match the others