Denso-Common Rail System – Electrical turbocharger guide vane adjustment actuator

fig 1 33 Denso Common Rail System   Electrical turbocharger guide vane adjustment actuator

1 Electrical turbocharger guide vane adjustment actuator
2 Variable geometry turbocharger

In this system, a simplified electrical turbocharger guide vane adjustment actuator is used. The integral electronics in the actuator unit are no longer required.

This means
• that the DC motor is actuated directly by the PCM.
• that the position of the guide vanes is detected directly via the position sensor by the PCM.

fig 1 34 Denso Common Rail System   Electrical turbocharger guide vane adjustment actuator

1 Connection 1: DC motor (+)
2 Connection 2: DC motor (–)
3 Connection 3: Position sensor (–)
4 Connection 4: PWM position sensor output signal
5 Connection 5: Position sensor reference voltage
6 PCM
7 DC motor
8 Position sensor (breakerless)
9 Electrical turbocharger guide vane adjustment actuator

The inductive (breakerless) position sensor transmits PWM signals to the PCM. The duty cycle is determined by the position of the guide vanes.

Duty cycle of the position sensor:
• with minimum opening of the guide vanes (maximum boost pressure): approx. 90 %
• with maximum opening of the guide vanes (minimum boost pressure): approx. 10 %

04. September 2018 by sam
Categories: Denso-Common Rail System | Leave a comment

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