Diesel with a Lambda sensor with display

sooty · Post by **sooty** » 03 Feb 2005, 00:06

Browsing the net the other night, someone asked if a diesel could use a Lambda sensor with a suitable display indicating the oxygen levels when tuning the fuel system.
Good idea, yes??
Anyone seen or heard if this is possible.
[8D]

AndersDK · Post by **AndersDK** » 03 Feb 2005, 00:14

Why not ?
The Lambda figure for petrols is optimised for 1, for diesels the Lambda figure is 2.
Honestly I dont think it is the best way to optimise a diesel engine using a Lambda tester. Instead you go for a soot particle test.

sooty · Post by **sooty** » 03 Feb 2005, 00:38

Yes, but could be used or setup while you are motoring doing your tests for best fuel settings.

rossd · Post by **rossd** » 03 Feb 2005, 02:15

Not really, as the relationship between soot levels (which most people limit their fuelling too) and oxygen levels is not very simple. Its easy in a petrol engine, as both fuel and air amounts can be changed, (thus increasing or decreasing the oxygen content) but harder in a diesel where the amount of air is constant. You might say that the amount of air is changed in a diesel by the turbo, but adding more air actually cleans the exhaust of soot particles.