Engine: Honda B16A2 with the pattakon VVAr on intake and exhaust valves (full version).
Data Logger: Hondata s200.
Open loop mode.
The log files
A1MOV.PNG and A1MOV.pdf
correspond to the video at
A1.MOV (QuickTime format, 4MB).
This data logging is one of the first, with the engine still having the original valve springs on it.
The injection/ignition tables finish at 1 Bar.
The log files
no70.PNG and no70.pdf
is an indicative data logging.
A set of "egg shape" Toda valve springs are installed (they are harder than the original valve springs and allow more than 12mm valve lift).
The columns from B11 to B16 of Hondata’s system (typically used for turbo applications) are active in injection/ignition tables.
The no70Analysis.pdf is an analysis of the no70 data log. The blue curve is the lambda value times the injection duration value, i.e. it is the quantity, per cycle, of air that is handled by the engine. At a first approach the blue curve gives the form of the torque curve.
The red curve is the value of the blue curve times the revs (horizontal axis). Roughly speaking, the red curve gives the form of the power curve.
The cyan curve is the MAP sensor. It gives an idea of how much the gas pedal was pressed (i.e. of the valve lift) at the specific revs.
The log files
ja21.PNG and ja21.pdf
is another indicative data logging.
The car moves slowly with 3rd gear at a steep uphill road.
The ja21Analysis.pdf is an analysis of the ja21 data log. The blue curve is the lambda value times the injection duration. This curve simply says that the engine at 750 rpm can handle per cycle some 130 units of air quantity, while the same engine at medium and high revs can handle some 150 units of air quantity.
The red curve is the value of the blue curve times the revs.
The cyan curve is the MAP sensor. It gives an idea of how much the gas pedal was pressed at the specific revs.
The log files
de96.PNG and de96.pdf
is another indicative data logging.
The car accelerates at an uphill road (the same road as in the no70 logs).
Next versions:
Fully Variable VVA
Desmodromic VVA
mailto:vva@pattakon.com
Pattakon Greece