Smooth Throttle for UpRev

1slow370 · 05-14-2014, 06:32 PM

Quote:

Originally Posted by esfourteen

My throttle bodies are squeaky clean, and completely unrelated to throttle on this car. For most driving scenarios the throttles are fully open and air intake is controlled using VVEL by adjusting lift, throttle % is just a simulated number.

not quite entirely there is always some amount of throttle applied to create vacuum for the brake booster. this is why the car has two map sensors

Also could somebody with logging post up a graph of a 3,4, or 5 gear pull from 2k to 7500rpm on a warm engine logging tps, vvel, vvt with voltage on the vertical and rpm on the horizontal.

jrb55gh · 05-14-2014, 10:08 PM

Here is a data log from my Ecutek software of throttle pedal sensor and throttle opening sensor for several easy starts. It appears that the throttle roughly follows the throttle pedal and does not remain wide open. The pedal sensor voltage is in blue and the throttle opening sensor is in yellow. The second screenshot overlays the VVEL (magenta) and VVT (red). There is truly a lot going on with every movement of the throttle pedal.

juld0zer · 08-07-2014, 04:47 AM

Quote:

Originally Posted by jrb55gh

Here is a data log from my Ecutek software of throttle pedal sensor and throttle opening sensor for several easy starts. It appears that the throttle roughly follows the throttle pedal and does not remain wide open. The pedal sensor voltage is in blue and the throttle opening sensor is in yellow. The second screenshot overlays the VVEL (magenta) and VVT (red). There is truly a lot going on with every movement of the throttle pedal.

from what i've read about VVT, the VVT advance should be zero (ie. not advanced nor retarded) when the gas pedal is at rest. Unless Nissan's CVTC system is different to that of other makes. Or i may have just misunderstood the materials i've read.

Your screenshot is of interest to me because i am trying to figure out an intermittent throttle response loss, which occurs mainly when the engine is fully warmed up.

Your VVT cam angle appears to be advanced at approx 35* when you are coasting which is pretty much the same conclusion i formed after graphing my Uprev logs. The only time cam angle is at zero is at a standstill idling.

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05-14-2014, 10:08 PM	#2 (permalink)
jrb55gh Base Member Join Date: Mar 2013 Location: DFW Texas Posts: 149 Drives: '13 370z black 7AT Rep Power: 13	Here is a data log from my Ecutek software of throttle pedal sensor and throttle opening sensor for several easy starts. It appears that the throttle roughly follows the throttle pedal and does not remain wide open. The pedal sensor voltage is in blue and the throttle opening sensor is in yellow. The second screenshot overlays the VVEL (magenta) and VVT (red). There is truly a lot going on with every movement of the throttle pedal.