I recently bought a Kia Ceed 2020 PHEV (Plug-in Hybrid Electric Vehicle). Its specs mention a 6-gear Dual-Clutch Transmission (DCT), a 105 kW Internal Combustion Engine (ICE) and a 44 kW Motor-Generator (MG). The user manual mentions a Hybrid Starter-Generator (HSG).
I'm struggling to understand how all these components are connected and how they transfer power in some modes. There are plenty of YouTube videos describing the Toyota hybrid drive train, but I didn't manage to find anything that describes a drive train with a DCT -- except some rather uninformative marketing videos.
In particular, the car seems to like turning on the ICE for cabin heating, even if propulsion is completely electric. In this mode, the ICE seems to run at constant RPM and charge the high-voltage battery for additional load and better energy conservation. This suggests two separate "paths" for the high-voltage battery to be charged mechanically, one from the wheels and one from the ICE.
I tried "reverse engineering" the drive train in the diagram below, based on marketing material and my observation that the MG seems to be connected through the DCT to the wheels. I highlighted more "hypothetical" components with a question mark.
- Does this arrangement make sense?
- Can the HSG charge the high-voltage battery?
- Is there a clutch between the ICE and the MG?