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IDProjectCategoryView StatusDate SubmittedLast Update
0000171FirmwareDecoderspublic2011-06-16 16:122012-09-03 16:45
ReporterFred 
Assigned ToFred 
PrioritynormalSeverityminorReproducibilityhave not tried
StatusclosedResolutionfixed 
PlatformOSOS Version
Product Version0.2.0-SNAPSHOT 
Target Version0.2.0Fixed in Version0.2.0 
Summary0000171: Optimise and fine tune 4and1 CAS angles
DescriptionThat code was written when we had 1.0 degree scheduling and calcs. We now have 0.02 degree scheduling and calcs and it can be fine tuned to provide accurate scheduling. There are notes in the code about what is wrong and what to improve. A lathe or other spinning device is necessary for testing this as compression effect and/or friction variations and/or valve spring compression will produce bad results if a real engine is used.
TagsNo tags attached.
FirmwareVersion
Issue TypeImprovement
Risk of Breakagevery low
Attached Files

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User avatar (0000286)
Fred (administrator)
2011-09-24 19:57

Logic is inverted and code is functional again. This step must wait until I have a soldering iron and drill or similar.
User avatar (0001372)
Fred (administrator)
2012-04-01 20:45

I now have a soldering iron, a drill, and a working CAS unit. I may try to tackle this at some point.
User avatar (0001992)
Fred (administrator)
2012-09-03 13:55

A picture of the disk in question, partly obscured: http://i240.photobucket.com/albums/ff150/inspector72/car%20stuff/FE3distributor.jpg [^]
User avatar (0001993)
Fred (administrator)
2012-09-03 14:29

((17.0885833 / 27.8986667 ) * 180)
110.254193402009
69.7458065979906

((17.1125833 / 27.93575 ) * 180)
110.262477076864
69.7375229231361

((17.1613333 / 28.0056667 ) * 180)
110.300534070128
69.699465929872

180 - ((17.1335 / 27.97175) * 180)
110.255168160734
69.7448318392664

Inner angle:

((21.762 / 111.8634167 ) * 720)
140.069385168351

((21.7486667 / 111.8353333 ) * 720)
140.018718252436

((21.7145833 / 111.9624167) * 720)
139.640608311378

((21.8273333 / 112.0089167) * 720)
140.30740086606
 
 
Rolling with 69.74 and 140.00 for next test.
User avatar (0001997)
Fred (administrator)
2012-09-03 15:46

6 - 7 = 2.26925
7 - 8 = 10.9546667 ~= 69.74
8 - 9 = 8.6346667

21.8585833 outer ~= 140

(2.26925 / 21.8585833) * 140 = 14.5341075237936
(10.9546667 / 21.8585833) * 140 = 70.1625222893562
(8.6346667 / 21.8585833) * 140 = 55.3033708273308

OR

(2.26925 / 10.9546667) * 69.74 = 14.4465823866645
(21.8585833 / 10.9546667) * 69.74 = 139.156912856326
(8.6346667 / 10.9546667) * 69.74 = 54.9703311062855

540 - 14.5 = 525.5

AND again

2.2885833
11.0455
8.6976667
22.03175

(2.2885833 / 22.03175) * 140 = 14.5427241140627
(11.0455 / 22.03175) * 140 = 70.1882510467848
(8.6976667 / 22.03175) * 140 = 55.2690248391526

OR

(2.2885833 / 11.0455) * 69.74 = 14.4498482949617
(22.03175 / 11.0455) * 69.74 = 139.105902403694
(8.6976667 / 11.0455) * 69.74 = 54.9160541087321

525.5 again.
User avatar (0002000)
Fred (administrator)
2012-09-03 16:36

New angles available in hash c29b8ae, clean up/optimisation coming in a different issue.
User avatar (0002001)
Fred (administrator)
2012-09-03 16:45

Logic was swapped in hash 2e3fc21e54c218e17e09bc711d938e885016d45b and now-wrong comments removed in hash 21ec22119887325400334b6840d18a7c81a2d615, just FYI.


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