| General > General Technical Chat |
| Murphy’s Law with my OBD2 reader |
| << < (12/13) > >> |
| PlainName:
--- Quote from: AVGresponding on February 09, 2023, 08:48:51 pm --- --- Quote from: PlainName on February 09, 2023, 08:17:31 pm --- --- Quote --- I think that does indicate it is bad (5% state of charge according to a graph I found) - would others concur? --- End quote --- Scrap it. It will let you down when you least need to be let down. If the car is reporting it as problematic then it's really buggered and I'm surprised you haven't had to jump start your car in the recent cold weather. --- End quote --- Presumably because it's an EV... --- End quote --- Ah! I missed that bit - fixated on the normal one this thread is about :) Edit: no, the GTE is a proper car, not an EV. |
| tom66:
--- Quote from: PlainName on February 09, 2023, 10:06:40 pm ---Edit: no, the GTE is a proper car, not an EV. --- End quote --- It may have a 'proper engine', but it lacks a starter, alternator and a starter battery and has much more in common with an EV than an ICE. It has a high-voltage battery (350V lithium-ion, 8.9kWh), motor-generator (80kW rated) and clutch packs which allow the electric motor to start the engine and use the engine as a generator when needed. The 12V battery is only 44Ah and rated for 200A CCA, which would be more appropriate in a 1.0L city car if it did need to start anything. Fun benefit of this is I know someone with a GTE in Norway, who started his car in -25C weather. It doesn't even blink - the engine starts absolutely immediately because the electric motor can put 10kW into the crankshaft to get it up to operating speed pronto (though I hope the oil works well when it does this.) |
| PlainName:
OK, so holding on to being a proper car by the tips of its finge sparkplugs. I won't ask if it has a trout pout. Can it start from the EV battery? |
| tom66:
--- Quote from: PlainName on February 09, 2023, 11:19:51 pm ---OK, so holding on to being a proper car by the tips of its finge sparkplugs. I won't ask if it has a trout pout. Can it start from the EV battery? --- End quote --- It *only* starts the engine from the EV battery. If you mean can it drive on the EV battery, yes, it can do so for about 20-25 miles before that tiny battery is exhausted. (Only about 60% of the battery is usable capacity. The rest is reserved, probably for those -25C engine starts after sitting for months on end kind of scenarios.) Edit: Actually, sometimes starting the engine is more complicated. Since it is a parallel hybrid, the engine and motor are connected together, with a clutch separating the engine for when it is not needed (coasting, regen, pure-EV mode, etc.) Starting the car while stopped entails having the gearbox into a virtual 'neutral' with both clutches disengaged, turning the motor to the required speed and pulling in the engine clutch then adding fuel and spark. All happens very quickly and with very little bother. While moving, it is a bit more challenging, because you can't stop driving the wheels (parallel hybrid = only one motor, unlike a Prius which has two, or a Volt/Ampera where the engine and wheels are often not connected at all.) So, the electric motor adds in a small amount of torque and a precise balancing act between the clutch pulling in the engine and the electric motor adding the torque in is performed over the course of about 500ms. This again happens very seamlessly, and besides under hard acceleration, you don't notice the engine starting and providing torque. It happens all the time when doing lower speed driving on the engine when the computer determines which powertrain is best to use. Once the engine is running, the motor switches to a generator (usually, just to provide enough energy to keep the hybrid battery from discharging - it runs the air con, 12V, etc.) or blends in extra torque as needed to map in little troughs on the power/efficiency map. |
| james_s:
--- Quote from: tom66 on February 09, 2023, 10:26:53 pm ---It may have a 'proper engine', but it lacks a starter, alternator and a starter battery and has much more in common with an EV than an ICE. It has a high-voltage battery (350V lithium-ion, 8.9kWh), motor-generator (80kW rated) and clutch packs which allow the electric motor to start the engine and use the engine as a generator when needed. The 12V battery is only 44Ah and rated for 200A CCA, which would be more appropriate in a 1.0L city car if it did need to start anything. Fun benefit of this is I know someone with a GTE in Norway, who started his car in -25C weather. It doesn't even blink - the engine starts absolutely immediately because the electric motor can put 10kW into the crankshaft to get it up to operating speed pronto (though I hope the oil works well when it does this.) --- End quote --- It's a hybrid, this is a distinctly separate category from either conventional or EV. It has pretty much all of the components of both, about the only thing missing is the separate starter motor and alternator since it uses a motor-generator for that. The "plug in" aspect just means it has a charger tacked on that allows charging the traction battery from the grid. Overall I would argue that a hybrid is closer to a conventional ICE vehicle than to a BEV, although it is a spectrum. The electric propulsion is only active at parking lot speeds, once you reach a certain speed the ICE fires up and it drives much like a conventional car. |
| Navigation |
| Message Index |
| Next page |
| Previous page |