**Eaton Supercharger: The Fastest Spinning Supercharger**

When it comes to supercharging engines, Eaton is known for its high-performance technology. One such example is their supercharger that can run up to 3500 RPM before disengaging and engaging at an incredible pace of eight one-hundredths of a second. This means that the supercharger can spin up to around 23,000 RPM in just over 8 seconds.

To put this into perspective, if you were watching the video being filmed at 30 frames per second, two frames would be roughly equivalent to about 0.07 seconds. This is slightly faster than how quickly the supercharger can spool up, giving you an idea of its impressive acceleration capabilities.

**The Bypass Valve and Turbocharger**

Once the supercharger has reached 3500 RPM, the clutch disengages, and the bypass valve opens, allowing exhaust gases to flow through and fully spool up the turbocharger. This ensures a smooth transition from boost and maintains the torque curve flat from 2200 RPM all the way to 5400 RPM.

As a result, you get immediate torque without waiting for the turbo to catch up. The supercharger takes over in low-RPM scenarios, providing instant response. This technology allows Volvo to offer their engines with peak power output while also improving fuel efficiency.

**The T8 Engine: A Plug-in Hybrid Solution**

Volvo's T8 engine is a plug-in hybrid solution that combines the best of both worlds – electric motors and supercharging. The engine features two motors, one between the transmission and the engine, providing an additional 47 horsepower and 111 pound-feet of torque. Another motor is located at the rear of the vehicle, adding another 87 horsepower and 177 pound-feet of torque.

The result is a total output of 400 horsepower and 472 pound-feet of torque, making it a wildly quick and powerful solution for heavy vehicles like the XC90. With a weight of around 5100 pounds, the T8 engine can propel the vehicle from 0-60 in just 5.3 seconds.

**Cost Savings through Simplification**

One of the notable features of Volvo's new engine technology is the simplification of their engine variants. They used to have eight different engine options but have narrowed it down to just two – a gasoline and a diesel variant. By eliminating the need for multiple engine architectures, they've been able to reduce costs.

This cost savings has enabled them to maintain price competitiveness with their previous engines, making the T8 engine a more affordable option. While these vehicles are undoubtedly luxury cars and come with a premium price tag, Volvo's efforts to simplify their product range have helped keep costs in check.

**Conclusion**

The Eaton supercharger and Volvo's T8 engine technology represent a significant step forward in terms of performance, efficiency, and cost savings. By combining the benefits of electric motors, turbocharging, and supercharging, Volvo has created a unique solution that provides instant torque and response while also improving fuel efficiency.

Whether you're looking at the supercharger's impressive acceleration capabilities or the T8 engine's plug-in hybrid powertrain, it's clear that Volvo is pushing the boundaries of what's possible in automotive engineering.

"WEBVTTKind: captionsLanguage: enhello everyone and welcome to another episode of the best engines the show where I talk about award-winning engines in this episode we're going to be talking about Volvo's 2-liter inline four-cylinder which is not only supercharged it's also turbocharged now this T6 engine has a bit of a history winning Ward's Auto 10 best engine Awards in 2011 the t61 has a straight six-cylinder engine in 2015 the T5 one which is a turbocharged four-cylinder 2-liter in 2016 the t61 which adds on to that 2-liter four-cylinder turbocharged engine a supercharger and then in 2017 the twin charged 2-liter Volvo S60 pole star one the vehicle we are looking at here is the 2018 Volvo S90 T6 all-wheel drive inscription its 2-liter twin charged engine produces 316 horsepower at 5700 RPM and 295 pound-feet of torque from 2200 RPM all the way to 5400 RPM now pump the hood reveals a pretty bland understated engine bay that doesn't reveal the potency that this engine has the engine is mounted transversely slightly ahead of the center line of the front wheels and it is tilted slightly back the battery is not up in the main engine compartment but rather stored in the back of the car to the side of the trunk now as far as the airflow for this engine it's a bit complicated looking at the engine bay and things are pretty well hidden so we're going to look at the Whiteboard here so we can get a better understanding of this and so we've got a representation of what this looks like kind of sprawled out here where here we have our engine we've got the supercharger right here we've got the turbocharger sending air through an intercooler that engine is going to be sending that power eventually through the transmission to the driven wheels and here we have our intake so this is the basic setup of our engine and there's really three scenarios we need to talk about in order to talk about how this airflow is working so in low throttle scenarios you know scenarios where maybe you're just cruising on the highway when you're not asking for a whole lot of power obviously you don't need that supercharger working and so it has a clutch which can decouple so you're no longer spinning the Supercharger so your airflow when you're just kind of cruising along not asking for a whole lot of power it's going to come in your intake this bypass valve is going to be open so it's not going to flow through the supercharger instead it'll flow through this bypass valve into the turbocharger through the intercooler and then into the engine and so that's going to be more efficient you know you're not requiring the supercharger to be used to create that additional power but let's say now you floor it when you're in that low throttle low RPM scenario so you're less than 3500 RPM and you floor it well in this scenario this bypass valve is going to close so once you step on the gas there that bypass valve is going to close this supercharger clutch is going to engage so that the supercharger starts spinning and so instead of your airflow throwing this path it's going to flow directly through the supercharger and then pass around that bypass valve here before it is then fed into the turbocharger through the intercooler and then into the engine so this is going to provide you that response that drivers want you know in those low RPM scenarios where you may not have enough exhaust pressure to spool up that turbo but you can get that supercharger and act it very quickly and start getting Boost from that supercharger very quickly so you get great quick response and a lot of torque in those lower RPM so this supercharger will run up to 3500 RPM before this clutch is disengaged and it can engage if it's not you know let's say you're at a low throttle and then you floor it it can engage as fast as eight one hundredths of a second and it will spin up to about 23 000 RPM so I was reading a road and track article on this supercharger and they were saying that Eaton was claiming that this was their fastest spinning supercharger and to give you a quick little visual of you know what is 0.08 seconds well this video is being filmed in 30 frames per second so you know if you were to take two frames that's about 0.07 seconds and so I'm just going to take this marker right here and then I'm going to show you how far it drops in just two frames or just slightly quicker than how fast this supercharger can spool up so I'm just going to let it go and then show you the frames uh so you know about 0.07 seconds here so a little bit faster than this supercharger actually reacts but that's giving you an idea of how quickly it can start to then split up the supercharger and give you that immediate boost now what happens once you've reached 3500 RPM well at this point if you're still fully on the throttle and you've reached 3500 RPM that supercharger clutch disengages and so now this bypass valve is going to open you're no longer going to be sending airflow through the supercharger instead you now have sufficient exhaust gases which have built up and they're fully spooling up this turbocharger so it's a smooth transition and boost there's not a dip in boost that torque curve remains totally flat from 2200 RPM all the way to 5400 RPM and so you have that airflow come through pass through this bypass valve right here into your turbocharger through the intercooler and into the engine so you have this nice smooth transition where you maintain Peak torque and so at really any moment you know within the engine RPM you can get immediate torque um and get the response that you're looking for without waiting for that turbo to school up because you have the supercharger to take its place and those low RPM scenarios now Volvo doesn't just stop here with this engine so it's supercharged it's turbocharged and you can also get it as a plug-in option with their T8 engine and so what they do is they add in a motor right here between the transmission and the engine so this is what they call a crank integrated starter generator and so this is going to have an additional 47 horsepower and 111 pound-feet of torque and then they also add an additional motor to the rear of the vehicle with 87 horsepower 177 pound-feet of torque so this gives the total output Peak for this system at 400 horsepower 472 pound-feet of torque with the T8 engine option the twin engine option and in a vehicle the XC90 which is weighing about 5100 pounds they're climbing 0-60 time in 5.3 seconds so wildly quick for a super heavy vehicle using all the technology that's out there turbocharger electric motors superchargers let's throw it all in there let's get rid of that 0.0 second uh delay in response and have an electric motor that gives you that immediate torque that immediate response so a very cool solution um in that T8 engine lots of advantages of this with the response time with the efficiency of using that small engine still having super high power outputs so getting you know the speed that you want getting the efficiency that you want of course you know a bit complicated uh you know the cost could be associated with that one of the things they have done from a cost perspective is that they used to have quite a bit uh different engine variants about eight different engine variants and they took these architectures down to pretty much just two so a gasoline and a diesel variant so simplifying the architecture so that they can make these engines more affordable so it's not you know quite as when you look at it okay this is quite complicated it's a plug-in hybrid it supercharges turbocharged it's got all these features but yet you know because they simplified their product range with these engines they're able to keep the cost uh relatively you know in the the more affordable range we're at the same price point that their previous engines were at and that's not to say that these vehicles are cheap they are certainly luxury cars and they are priced accordingly but it is pretty cool what they've been able to do from a cost perspective by eliminating all of the different engine variants out there and then simplifying That Into You know several cooler uh unique efficient powerful options so I hope you've enjoyed this if you have any questions or commentshello everyone and welcome to another episode of the best engines the show where I talk about award-winning engines in this episode we're going to be talking about Volvo's 2-liter inline four-cylinder which is not only supercharged it's also turbocharged now this T6 engine has a bit of a history winning Ward's Auto 10 best engine Awards in 2011 the t61 has a straight six-cylinder engine in 2015 the T5 one which is a turbocharged four-cylinder 2-liter in 2016 the t61 which adds on to that 2-liter four-cylinder turbocharged engine a supercharger and then in 2017 the twin charged 2-liter Volvo S60 pole star one the vehicle we are looking at here is the 2018 Volvo S90 T6 all-wheel drive inscription its 2-liter twin charged engine produces 316 horsepower at 5700 RPM and 295 pound-feet of torque from 2200 RPM all the way to 5400 RPM now pump the hood reveals a pretty bland understated engine bay that doesn't reveal the potency that this engine has the engine is mounted transversely slightly ahead of the center line of the front wheels and it is tilted slightly back the battery is not up in the main engine compartment but rather stored in the back of the car to the side of the trunk now as far as the airflow for this engine it's a bit complicated looking at the engine bay and things are pretty well hidden so we're going to look at the Whiteboard here so we can get a better understanding of this and so we've got a representation of what this looks like kind of sprawled out here where here we have our engine we've got the supercharger right here we've got the turbocharger sending air through an intercooler that engine is going to be sending that power eventually through the transmission to the driven wheels and here we have our intake so this is the basic setup of our engine and there's really three scenarios we need to talk about in order to talk about how this airflow is working so in low throttle scenarios you know scenarios where maybe you're just cruising on the highway when you're not asking for a whole lot of power obviously you don't need that supercharger working and so it has a clutch which can decouple so you're no longer spinning the Supercharger so your airflow when you're just kind of cruising along not asking for a whole lot of power it's going to come in your intake this bypass valve is going to be open so it's not going to flow through the supercharger instead it'll flow through this bypass valve into the turbocharger through the intercooler and then into the engine and so that's going to be more efficient you know you're not requiring the supercharger to be used to create that additional power but let's say now you floor it when you're in that low throttle low RPM scenario so you're less than 3500 RPM and you floor it well in this scenario this bypass valve is going to close so once you step on the gas there that bypass valve is going to close this supercharger clutch is going to engage so that the supercharger starts spinning and so instead of your airflow throwing this path it's going to flow directly through the supercharger and then pass around that bypass valve here before it is then fed into the turbocharger through the intercooler and then into the engine so this is going to provide you that response that drivers want you know in those low RPM scenarios where you may not have enough exhaust pressure to spool up that turbo but you can get that supercharger and act it very quickly and start getting Boost from that supercharger very quickly so you get great quick response and a lot of torque in those lower RPM so this supercharger will run up to 3500 RPM before this clutch is disengaged and it can engage if it's not you know let's say you're at a low throttle and then you floor it it can engage as fast as eight one hundredths of a second and it will spin up to about 23 000 RPM so I was reading a road and track article on this supercharger and they were saying that Eaton was claiming that this was their fastest spinning supercharger and to give you a quick little visual of you know what is 0.08 seconds well this video is being filmed in 30 frames per second so you know if you were to take two frames that's about 0.07 seconds and so I'm just going to take this marker right here and then I'm going to show you how far it drops in just two frames or just slightly quicker than how fast this supercharger can spool up so I'm just going to let it go and then show you the frames uh so you know about 0.07 seconds here so a little bit faster than this supercharger actually reacts but that's giving you an idea of how quickly it can start to then split up the supercharger and give you that immediate boost now what happens once you've reached 3500 RPM well at this point if you're still fully on the throttle and you've reached 3500 RPM that supercharger clutch disengages and so now this bypass valve is going to open you're no longer going to be sending airflow through the supercharger instead you now have sufficient exhaust gases which have built up and they're fully spooling up this turbocharger so it's a smooth transition and boost there's not a dip in boost that torque curve remains totally flat from 2200 RPM all the way to 5400 RPM and so you have that airflow come through pass through this bypass valve right here into your turbocharger through the intercooler and into the engine so you have this nice smooth transition where you maintain Peak torque and so at really any moment you know within the engine RPM you can get immediate torque um and get the response that you're looking for without waiting for that turbo to school up because you have the supercharger to take its place and those low RPM scenarios now Volvo doesn't just stop here with this engine so it's supercharged it's turbocharged and you can also get it as a plug-in option with their T8 engine and so what they do is they add in a motor right here between the transmission and the engine so this is what they call a crank integrated starter generator and so this is going to have an additional 47 horsepower and 111 pound-feet of torque and then they also add an additional motor to the rear of the vehicle with 87 horsepower 177 pound-feet of torque so this gives the total output Peak for this system at 400 horsepower 472 pound-feet of torque with the T8 engine option the twin engine option and in a vehicle the XC90 which is weighing about 5100 pounds they're climbing 0-60 time in 5.3 seconds so wildly quick for a super heavy vehicle using all the technology that's out there turbocharger electric motors superchargers let's throw it all in there let's get rid of that 0.0 second uh delay in response and have an electric motor that gives you that immediate torque that immediate response so a very cool solution um in that T8 engine lots of advantages of this with the response time with the efficiency of using that small engine still having super high power outputs so getting you know the speed that you want getting the efficiency that you want of course you know a bit complicated uh you know the cost could be associated with that one of the things they have done from a cost perspective is that they used to have quite a bit uh different engine variants about eight different engine variants and they took these architectures down to pretty much just two so a gasoline and a diesel variant so simplifying the architecture so that they can make these engines more affordable so it's not you know quite as when you look at it okay this is quite complicated it's a plug-in hybrid it supercharges turbocharged it's got all these features but yet you know because they simplified their product range with these engines they're able to keep the cost uh relatively you know in the the more affordable range we're at the same price point that their previous engines were at and that's not to say that these vehicles are cheap they are certainly luxury cars and they are priced accordingly but it is pretty cool what they've been able to do from a cost perspective by eliminating all of the different engine variants out there and then simplifying That Into You know several cooler uh unique efficient powerful options so I hope you've enjoyed this if you have any questions or comments\n"