No, I do not believe that to be the case.dren wrote:Also looks like he is showing the MGUH mounted under the turbo. Thought they had to be on the same axis?
5.2.4 The MGU-H must be solely mechanically linked to the exhaust turbine of a pressure charging system. This mechanical link must be of fixed speed ratio to the exhaust turbine and may be clutched.
It only requires a mechanical link to the turbo's shaft with a fixed ratio. It doesn't specify that the MGU-H need be on the same axis.
While there are some advantages to not having the MGU-H on the same axis - such as lowering the CoG - there are disadvantages.
The offset location requires a geartrain of some description. Because of the size of the turbo, the MGU-H will need to be offset by a relatively large distance, requiring either a pair of large gears, a train of several smaller gears or a shaft drive with bevel gears. The last has the additional disadvantage of lowering the drive efficiency, meaning more energy will be lost to the lubricating oil and less energy recovered (about 5-10% less IIRC). All have the disadvantage of putting side loading on the turbo shaft, requiring bigger and stronger bearings and a bigger and stronger shaft.
A co-axial layout allows the use of an epicyclic gear train, which will not put any additional side loading on the turbo's shaft and would maintain very high transmssion efficiencies.