Welcome to the community, @boristbear !
There certainly is start/stop in the hybrid. Anything else would be quite remarkable.
However, in Sport mode the engine (ICE) is always on.
And if the battery is empty it might also keep the engine on when stopping.
The E-tense lacks a traditional Start&Stop system. In Hybrid mode, the ICE sometimes operates even after the vehicle is stationary (when it acts as a generator). This depends on the electric motor’s demand for electricity. If the computer determines it needs it, it will engage the ICE in any situation.
BTW. In the BSI settings (for the DS7 hybrid), the Start&Stop system is set to “Absent.”
Not the battery, because that’s the same in the E-tense. I’m referring to the ICE turning on and off. When does this happen and why does it work when the vehicle stops while driving? In start&stop mode, the ICE turns off whenever the speed drops to zero. It can then turn on after about 30-45 seconds only due to low or high outside temperatures to maintain cabin comfort. In the E-tense (in hybrid or comfort mode), however, the ICE can turn on at any time, regardless of the car’s current speed.
Well, it becomes a strange comparison between a conventional petrol/diesel car with S&S and a plug-in hybrid without conventional S&S just because the hybrid might turn on the ICE at anytime due to certain hybrid specific factors.
If we subjectively answer OP’s question, I believe the answer must be Yes, it should stop the ICE in most situations when coming to a stand still (just as a conventional S&S would do). Otherwise I’m not sure what OP actually is asking.
The exceptions would be when either the traction battery is empty, or one of the many “mystery” conditions when the car decides it needs to run the ICE for a little while (a plug-in hybrid specific feature).
Running in Sports mode is another situation you won’t experience any S&S-like behavior since you just told the car to run with as much power as possible.
Conclusion, it sounds like there might be a problem with OP’s car. It should in most situations turn off the ICE not only at a stand still but also with a lift of the gas pedal.
Exactly, that’s why the Start&Stop system is part of the eco-friendly design of diesel/petrol engines. Hybrids are a different story.
The car is stationary and the ICE is working, the car is moving and the ICE is not working - such a situation does not occur in diesel/petrol with the Start&Stop system.
