Author Topic: quick question/ lamda table  (Read 6869 times)

Offline AVP

  • Hero Member
  • *****
  • Posts: 743
  • BHP: 11
quick question/ lamda table
« on: January 15, 2011, 12:10:12 pm »
On the lamda table, or any table for that matter, if the first kpa value is set, any other kpa value below that, is keeping the lamda that was used on that first value?

eg:

first value on lamda table is : 30kpa which has lamda=1.01  for say up to 1500rpm

any kpa below that, unless specified otherwise is going to have lamda =1.01  for the same rpm?

Offline GintsK

  • Hero Member
  • *****
  • Posts: 1257
  • BHP: 50
Re: quick question/ lamda table
« Reply #1 on: January 15, 2011, 01:01:00 pm »
Outside table interpolation is done between two border values (not four as usually). Or used corner value in case if engine works outside of both axis ranges.
It should be so for all tables.

Offline AVP

  • Hero Member
  • *****
  • Posts: 743
  • BHP: 11
Re: quick question/ lamda table
« Reply #2 on: January 15, 2011, 01:13:02 pm »
so for example if my lower lamda values on 30kpa are:

800  : 1.01
1400: 1.01
1900: 1.07
2900: 1.07
3600: 1.07
4500: 1.02
5500: 1.00
7800: 1.00

which are the 2 axis (border values) that get interpolated?

Offline GintsK

  • Hero Member
  • *****
  • Posts: 1257
  • BHP: 50
Re: quick question/ lamda table
« Reply #3 on: January 15, 2011, 01:32:42 pm »
At 1500: 1.01 and 1.07.
Finally lambda will be somewhat like 1.022

Offline AVP

  • Hero Member
  • *****
  • Posts: 743
  • BHP: 11
Re: quick question/ lamda table
« Reply #4 on: January 15, 2011, 01:35:58 pm »
i see

so it will interpollate similar to the last horizontal line then. ok.

thanks

Offline GintsK

  • Hero Member
  • *****
  • Posts: 1257
  • BHP: 50
Re: quick question/ lamda table
« Reply #5 on: January 15, 2011, 04:22:50 pm »
You can prove it by reviewing your log file.