Hi Jason, thanks for this video on mild hybrid technology. I’m 58 and have done the majority of my own car maintenance since the 1980’s, as you will know, car electronics has evolved hugely since then. My first car was a 1974 Renault 12TS, the TS got a rev counter and a coolant temperature gauge 😂. This car had an old school electrical system with no electronics, an alternator with mechanical voltage regulator, a distributor with points and condenser driving a coil. The fuel system was entirely mechanical ending in a carburettor. This design was simple and generally reliable, though points and condensers needed regular adjustment. 48V systems would have made sense even with this technology, cold cranking these old cars put a huge strain on the 12V battery, and coils had a ‘starting mode’ to boost the output HV when the starter motor was engaged. Cars have come a long way, mainly due to their electronics and better metalagery allowing less ware of the internals. I think this process reached its optimum in the 1990’s, but has now gone too far creating too much complexity. Nearly all the problems I help friends and family with now are related to anti-pollution systems such as EGR. I also advise people to disable their Stop/Start feature 90% of engine ware occurs at startup, so this technology goes against the long term heath of a combustion engine. Having said all this, I actually think the future of personal cars belongs to the pure battery vehicle. Traction battery technology will continue to get better and an AC motor makes for a very reliable, low maintenance and efficient propulsion system. It’s very hard to fight the laws of physics.
Nice to watch a UA-cam video on hybrids that's not loaded up with extremist & alarmist nonsense. Just out of curiosity, as batteries get better, lighter & cheaper, might we see further developments in mild hybrid tech, say a move to 60V or higher? If a mild hybrid could do just a couple of miles on electrical power alone, this might make a lot of sense to a lot of people who consider themselves 'green' but see EVs & PHEVs as costly & very compromised technologies.
Hi, very informative video. Since the FMO mode handles stalling speeds and the ICE shutdown, can a CVT be paired directly to the ICE avoiding the torque converter from the drivetrain?
Hey Jason, thank you so much for this very detailed info. Ive just purchased a Volvo XC40 Mild hybrid and wondered about the system and fascinated in how it actually does work and altho not a fan of the 'stop start' I had on my Audi S3, I had a feling the new car would have it. I'm embracing the stop start with the Volvo now after watching this So does this also mean the 12v battery up front is also Lithium Ion due to being smaller now?
I have a jeep with a 2.0 e tourqe engine. I deliver mail so I stop/start about every 50 feet all day long. All is uphill or down hill. Should I turn off the auto start stop?
HI Jason, i take it that there would be 48 volt at the starter/generator when the engine is not running. and it would use the 12 volt battery to crank the engine over with the normal starter motor? and when engine is running you would move off and when we get to a stop the engine would shut down and when we need to move on the starter generator would start the engine to move on. is this right? thanks Bert
If the 48V system has a DC-DC converter to bring the voltage down to 12V, why do you need a 12V battery at all? If the MHSG can start the car after you come to a stop at a traffic light, why can't it start the car initially?
Ive got a 2022 hyundai i20 with this system , I have to charge the 12 volt battery every 3 days or the stop/start and the mode they call sailing stops working , within 3 months from new the 12 volt battery went flat so i couldnt start the engine AA came out to it and charged the battery . had into the dealer they done a software upgrade but its still the same , I have to charge the battery overnight for the stop/start and sailing mode to work , after 2 days its back to not working , i have found out that if the 12 volt battery drops below 80% these things stop working. I dont think the hyundai dealer hasn't a clue whats wrong with it but they wont admit it, never buy one of these again.
Hi Jason, are you aware of the massive problems with the Kia/Hyundais 1.6crdi mhev48v. The tensioner from the starter generator fails and in some cases the engine seizes. As of September 2022 several hundred of these vehicles are at dealerships awaiting either new engines, rebuilds or new tensioner. I’ve bought one some 6 weeks ago unaware of the ticking timebomb I’m sat behind.
Batteries are very very expensive & not cost-effective for ordinary users. A mild hybrid battery costs 3000$... The life-span of a mild hybrid battery is 5 to 8 years only...
I'm sorry, but this is stupid. They should have been able to throw out the 12V starter. This is just lazy engineering! Anyway, thank you for the nice presentation, I've been looking for proper information on these 48V systems.
If the 48V system has a DC-DC converter to bring the voltage down to 12V, why do you need a 12V battery at all? If the MHSG can start the car after you come to a stop at a traffic light, why can't it start the car initially?
12V is the auxiliary battery, for powering accesories (lights, aircon, audio etc). 48V battery is purely for the ISG. even BEV with large main battery still have separate 12V battery. even Tesla still use 12V aux battery
48V battery barely have enough capacity for ISG, let alone integrating whole car electronics into it. and ISG can do the initial start of the car, thats why when you start-up MHEV car they dont have starter motor sound, because its done by ISG
@@ProfessorOzone modern electronics in car like ECU, sensors are very sensitive to current and voltage change. 12V battery ensure these sensitive electronics to receive a stable and constant flow of electrics
AWESOME video. I recently bought a 2024 BMW mild hybrid. Had no idea how it worked. You thoroughly explained the mechanics & benefits! Thank you!
Hi Jason, thanks for this video on mild hybrid technology. I’m 58 and have done the majority of my own car maintenance since the 1980’s, as you will know, car electronics has evolved hugely since then. My first car was a 1974 Renault 12TS, the TS got a rev counter and a coolant temperature gauge 😂. This car had an old school electrical system with no electronics, an alternator with mechanical voltage regulator, a distributor with points and condenser driving a coil. The fuel system was entirely mechanical ending in a carburettor. This design was simple and generally reliable, though points and condensers needed regular adjustment. 48V systems would have made sense even with this technology, cold cranking these old cars put a huge strain on the 12V battery, and coils had a ‘starting mode’ to boost the output HV when the starter motor was engaged.
Cars have come a long way, mainly due to their electronics and better metalagery allowing less ware of the internals. I think this process reached its optimum in the 1990’s, but has now gone too far creating too much complexity. Nearly all the problems I help friends and family with now are related to anti-pollution systems such as EGR. I also advise people to disable their Stop/Start feature 90% of engine ware occurs at startup, so this technology goes against the long term heath of a combustion engine.
Having said all this, I actually think the future of personal cars belongs to the pure battery vehicle. Traction battery technology will continue to get better and an AC motor makes for a very reliable, low maintenance and efficient propulsion system. It’s very hard to fight the laws of physics.
Great job.
Really nice video, thank you! Just small hint for your next video volt symbol is capital V and watt is capital W.
Really informative.
Well explained, thank you
Nice to watch a UA-cam video on hybrids that's not loaded up with extremist & alarmist nonsense. Just out of curiosity, as batteries get better, lighter & cheaper, might we see further developments in mild hybrid tech, say a move to 60V or higher? If a mild hybrid could do just a couple of miles on electrical power alone, this might make a lot of sense to a lot of people who consider themselves 'green' but see EVs & PHEVs as costly & very compromised technologies.
Hi, very informative video.
Since the FMO mode handles stalling speeds and the ICE shutdown, can a CVT be paired directly to the ICE avoiding the torque converter from the drivetrain?
Interesting, thanks. So hard to find specifics around my B5
Hey Jason, thank you so much for this very detailed info. Ive just purchased a Volvo XC40 Mild hybrid and wondered about the system and fascinated in how it actually does work and altho not a fan of the 'stop start' I had on my Audi S3, I had a feling the new car would have it. I'm embracing the stop start with the Volvo now after watching this So does this also mean the 12v battery up front is also Lithium Ion due to being smaller now?
Hello Jason. Any recomandations for on the shelf components ? I am looking have my turbo diesel car to a mild hybrid.
I have a jeep with a 2.0 e tourqe engine. I deliver mail so I stop/start about every 50 feet all day long. All is uphill or down hill. Should I turn off the auto start stop?
HI Jason, i take it that there would be 48 volt at the starter/generator when the engine is not running. and it would use the 12 volt battery to crank the engine over with the normal starter motor? and when engine is running you would move off and when we get to a stop the engine would shut down and when we need to move on the starter generator would start the engine to move on. is this right? thanks Bert
If the 48V system has a DC-DC converter to bring the voltage down to 12V, why do you need a 12V battery at all? If the MHSG can start the car after you come to a stop at a traffic light, why can't it start the car initially?
does it make ur car faster?
Ive got a 2022 hyundai i20 with this system , I have to charge the 12 volt battery every 3 days or the stop/start and the mode they call sailing stops working , within 3 months from new the 12 volt battery went flat so i couldnt start the engine AA came out to it and charged the battery . had into the dealer they done a software upgrade but its still the same , I have to charge the battery overnight for the stop/start and sailing mode to work , after 2 days its back to not working , i have found out that if the 12 volt battery drops below 80% these things stop working. I dont think the hyundai dealer hasn't a clue whats wrong with it but they wont admit it, never buy one of these again.
Hi Jason, are you aware of the massive problems with the Kia/Hyundais 1.6crdi mhev48v. The tensioner from the starter generator fails and in some cases the engine seizes. As of September 2022 several hundred of these vehicles are at dealerships awaiting either new engines, rebuilds or new tensioner. I’ve bought one some 6 weeks ago unaware of the ticking timebomb I’m sat behind.
What is FMO mode
The ICE is shut down and the vehicle is driven by the ISG.
Batteries are very very expensive & not cost-effective for ordinary users. A mild hybrid battery costs 3000$... The life-span of a mild hybrid battery is 5 to 8 years only...
From Which sourcrs you found those informstions?
I'm sorry, but this is stupid. They should have been able to throw out the 12V starter. This is just lazy engineering!
Anyway, thank you for the nice presentation, I've been looking for proper information on these 48V systems.
If the 48V system has a DC-DC converter to bring the voltage down to 12V, why do you need a 12V battery at all? If the MHSG can start the car after you come to a stop at a traffic light, why can't it start the car initially?
12V is the auxiliary battery, for powering accesories (lights, aircon, audio etc). 48V battery is purely for the ISG. even BEV with large main battery still have separate 12V battery. even Tesla still use 12V aux battery
48V battery barely have enough capacity for ISG, let alone integrating whole car electronics into it. and ISG can do the initial start of the car, thats why when you start-up MHEV car they dont have starter motor sound, because its done by ISG
@@rel6294 Yeah, still doesn't make sense to me. The 48V battery has a lower density than the 12V battery?
@@ProfessorOzone i would say its not about the density, the purpose of having 2 separate battery is a way to stabilize the electric supply to the car
@@ProfessorOzone modern electronics in car like ECU, sensors are very sensitive to current and voltage change. 12V battery ensure these sensitive electronics to receive a stable and constant flow of electrics