28 lines
1.0 KiB
Markdown
28 lines
1.0 KiB
Markdown
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### Step 1. Set bias curve.
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1.1 Calibrate throttle position sensor in your electronic throttle body.
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Zero position usually requires you to push throttle closed. Full throttle would definitely require you to push throttle open.
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Default position is usually somewhere around 4-8%.
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1.1 Feed-forward curve/Bias curve.
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"Bias curve" is a curve of PWM duty cycle values which kind of get TPS close to desired value, for each of the 8 points on the curve.
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It measures how much duty is required to hold the throttle at that spot.
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The goal is that at position X, the bias will somewhat hold it there on it's own.
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Bias is also known as feed-forward.
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We are interested in positions like 0, between-0-and-default, default, a bit open, a bit more open, 50% open, wide open,
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Set P=I=D=0. Set curve to all zeros.
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Now use offset (offset is same thing as constant bias) to manually control duty cycle. Try different values and see which offset sets throttle to closed, which offset
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starts to open throttle, which offset is enough to open throttle completely.
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