Intake Values, Opening Angle (Ca)

The parameter corresponds to the "Camshaft shift angle" but is calculated from another reference position on the crankshaft.

The engine control module (ECM) calculates the value using signals from the impulse sensor (crankshaft position) and the camshaft sensor (camshaft position).

The value indicates when the intake valves open relative to top dead center (TDC) of the cylinders.

The value reduces the farther out the camshaft is guided.

When the camshaft is in its 0 position (camshaft not guided out), the angle is 27°CA; when it has been guided out fully the angle is -23°CA.

CA = Crank Angle.