When does the turbo-charger waste gate fully open?

The turbocharger waste gate fully opens at maximum boost pressure. This is an important aspect of turbocharger functionality, as the waste gate's primary role is to control the amount of exhaust gas that flows through the turbocharger. When the engine reaches maximum boost pressure, the waste gate opens fully to ensure that excessive pressure is not built up, which can lead to turbocharger and engine damage. By regulating the flow, the waste gate helps maintain optimal performance and efficiency without over-pressurizing the intake system.

Other options, such as predetermined engine speed, during engine warm-up, or at idle engine speed, do not accurately describe the conditions under which the waste gate would open fully. These scenarios involve situations where the engine does not require maximum boost, and controlling the boost pressure at those times is not the primary concern of the waste gate.