As you say Mike it will be to lower hydrocarbons @ idle, the multi striking will cease around 1200 RPM-ish .
Capture again with a longer time base & increase RPM (1µs sample interval) & use the time cursors where the multi striking ceases to give an idea of RPM
PS Animated GIF's would have looked sweet
Last edited by Robski on Thu Jun 20, 2013 5:45 pm, edited 2 times in total.
AuthorMike wrote: these were purley taken for Waveform pre-sets.
Come on Mike you were very clearly in St Neots not in the Croydon borough!
Sorry could not resist that one
As Robski says multi strike has been used in the US of A for some time as an element of emissions strategy at idle(ish), i have heard of some systems that maintain multi strike > 3K rpm, quite prevalent in racing engines, also a number of the specialist ECU manufacturers offer the function.
I am guessing that the Pico breakout leads did not fit then!
At 699.3 ms through to 806.4 ms you can see the reduction from 3 events to one.
I placed the time cursors at the last multi-strike event & the first single strike event and this indicated 1200 RPM on the frequency/RPM info tab at the bottom right of the graticule
Where did you get the test leads that you are using between the ignition coil and the coil connector, or are those home-made? They look like a big time saver compared to peeling back insulation to get the amp probe around the wire.