Ok so been reading more about CV carbs and I guess I can see how cv slide/needle height can be a function of engine RPM without needing to consider load. More cycles per second, a certain volume of air per second exhausted from the cylinders, greater vacuum..
I’d like to see a graph of engine load, throttle position, vacuum pressure and rpm. Think that would be mighty helpful in understanding this better. See if can track something like that down from google.
Ok well Wikipedia says “The mass flow through the engine is the product of the rotation rate of the engine, the displacement of the engine, and the density of the intake stream in the intake manifold” so almost totally linear to rpm excluding blips relative to fuel mixture.
And from mechanics stack exchange the definition of calculated engine load is:
Quote:
LOAD_PCT = [current airflow] / [(peak airflow at WOT@STP as a function of rpm) *
(BARO/29.92) * SQRT(298/(AAT+273))]
Where:
- STP = Standard Temperature and Pressure = 25 °C, 29.92 in Hg BARO,
- SQRT = square root
- WOT = wide open throttle
- AAT = Ambient Air Temperature (in °C)
Characteristics of LOAD_PCT are:
- Reaches 1.0 at WOT at any altitude, temperature or rpm for both naturally
aspirated and boosted engines.
- Indicates percent of peak available torque.
- Linearly correlated with engine vacuum.
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