Thread: OLFA table vs. Custom OS A0008 table

1. OLFA table vs. Custom OS A0008 table

My custom OS does not have OLFA, it has a A0008 file. The A0008 states its a multiplier. Is this truely a multiplier or is it a divider?

Thanks,
Glenn  Reply With Quote

2. It is a multiplier. I'm going to assume that your display units are AFR or EQ Ratio , and that the commanded AFR is 14.63:1 (or EQ Ratio of 1.0) for the example.

- A multiplier of 1.00 the commanded AFR will be 14.63:1
- A multiplier of 1.20 the commanded AFR will be 12.19:1 (Richer)
- A multiplier of 0.80 the commanded AFR will be 18.29:1 (Leaner)

The multiplier is for enrichment (richening the mixture) and the lower the AFR numbers are richer the mixture.

Hope that makes sense.  Reply With Quote

3. how is 0.80*14.629=18.29 a multiplication? i'd call it a division  Reply With Quote

4.  Originally Posted by redhardsupra
how is 0.80*14.629=18.29 a multiplication? i'd call it a division
No wonder my AFRs are out of whack   Reply With Quote

5. All I can say is 'whatever', a higher number is more fuel. Multipliers generally give 'more', which in this case is fuel.

Either way, that's how it works.  Reply With Quote

6.  Originally Posted by redhardsupra
how is 0.80*14.629=18.29 a multiplication? i'd call it a division
If you look at it on EQ basis, it's a multiplier   Reply With Quote

7. Could have sworn Lamda was the multiplier and EQ was the divisor.   Reply With Quote

8.  Originally Posted by Garry
If you look at it on EQ basis, it's a multiplier This is the key. It multiplies the current EQ to get the target EQ; the current EQ equals 14.63 divided by current AFR.

AFR = 14.63 / EQ = 14.63 * Lambda

or

EQ = 14.63 / AFR = 1 / Lambda

EQ, Lambda, AFR are all units of how much air/fuel.

A008 is a multipler in the sense that it multiplies current EQ to give target EQ.

Like Tordne said, the higher numbers are richer.

Edit: the more I write here, the muddier it is becoming...   Reply With Quote

9. Okay, I am going to try what Tordne said and see what happens.

The whole multiplier/division thing confuses me; however, I understand what is being stated!

I will let you know how it goes.

Thanks for all of the help!

GLenn  Reply With Quote

10.  Originally Posted by redhardsupra
how is 0.80*14.629=18.29 a multiplication? i'd call it a division
Thats what i am trying to wrap my head around...lol. My commanded AFR is 14.70:1 and my multiplier (for a specific cell) is 1.0229. 14.70 x 1.0229 = 15.036 which equals a leaner AFR. So regardless of the table description of "multiplier", if i put a number larger than 1.00 in there, thats going to equal more fuel right?  Reply With Quote Posting Permissions

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