Operation

OPERATION




TURBOCHARGER COMPONENTS





The exhaust gases of the engine are directed through the exhaust manifold into the turbine housing (6) onto the turbine wheel (7). The flow energy of the exhaust gases cause the turbine wheel (7) to rotate. Consequently, the compressor wheel, which is connected through the turbine shaft with the turbine wheel (7), is driven at the same speed. The fresh air (A) inducted by the compressor wheel is compressed and passed to the engine.

The charge pressure is controlled by varying the position of the guide vanes (2). The guide stud (3) of the control linkage of the boost pressure actuator turns the adjusting ring (5) in the turbine housing (6). As a result, all the guide vanes (3) whose guide studs (4) likewise mesh into the adjusting ring (5), are also turned.

At low speeds, the flow cross-section is reduced by closing the guide vanes (2). Consequently the speed at which the exhaust gas impacts on the turbine wheel (7) is increased, as a result of which the speed of the turbocharger and thus the charge pressure rises.

At high engine speeds the guide vanes (2) are increasingly opened and the flow cross-section is thus enlarged, as a result of which the speed of the turbocharger reduces and the charge pressure drops.

The turbocharger guide veins are controlled by the electronic actuator. The ECM monitors the boost and charge air changes to the turbocharger system during operation. The ECM sends a PWM signal to the actuator. The actuator will then respond to the signal adjusting the guide veins.