General Motors is looking to put the woes of typical, two-stage turbochargers behind, AutoGuide reports. The patent, filed on May 19, 2016, details a low and high pressure turbine arranged in a series.
The clever engineering behind this design is it utilizes a bypass system to optimize high- and low-end pressure, whereas in normal, two-stage turbos, both turbines operate at lower speeds; at higher speeds, only the low-pressure operates. Inevitably, it leads to loss of lower-end performance
This system would allow for isolation of either the low- or high-end side of things. According to filing, the actuator, a single rotating spindle with discs corresponding to flanges on the high and low pressure sides, behaves with the ECU, taking readings from engine speed and load.
All of this technical speak leads to increased, and fluid, performance. Therefore, we can expect the system to reach premium vehicles first before we see it trickle down GM’s portfolio of vehicles.