Volvo Trucks – D13 Turbo Compound engine

Volvo Trucks' new turbo compounding, available on our D13 engines beginning mid-2017. Turbo compounding can provide dramatic savings through fuel efficiency improvements of up to 6.5%.

[LizardKing]

This is World War 2 aviation technology. There are aspects of this type of supercharging that increase boost without increase fuel consumption. To over simplify if you will, it functions similar to a water wheel. You benefit from the flow of the exhaust without causing back pressure. With a standard turbo charger you have back pressure between the exhaust valves and the turbo equal to or greater than the manifold pressure. Which also traps heat in the exhaust valves/head and turbo. It tough to wrap your head around. I just watched a video on the Douglas DC7 that was capable of 400 mph from the use of the Compound Supercharge Technology. The narrator said this technology has been asleep since the 50s. There are tons of fuel savings and horse power laying on the table if Caterpillar, Cummins and Detroit would revisit this technology. This video only describes one of the general methods of compounding. This is not what we think of in terms of compound turbos that Caterpillar Acert engines use.

[PKWeaver]

Came here from a video about the DC7 and it's turbo compounding engine.
Would be interesting to see this tech coupled to a battery hybrid electric motor in cars.

[teravolt]

Great, so it's basically a secondary axial free turbine, just like helicopter turboshaft engines (and the Chrysler turbine car engine too).

[royb]

Gotta admit cool idea, ish" as long as the engineering is precise

[mchertonok]

Detroit diesel had similar sistem on dd15 and many people hated it. Sure hope volvo does it better.

[pyatt]

#Volvo, Please do an eXceed Package Video 🙏

[royb]

What if they use clutches & vibration dampers to regulate & smoothen the transfer, still it's very complicated, lot of load on the turbines

[hunzolee]

Did Scania start using this technology on the 12-liter engine in 2007. Saab-Scania. Old technology come back?

[fadedsoul]

am i dumb? why is it running off a geared system and exhaust gases? someone said they did something like this in WW2 but ive never seen this before, can someone explain what the gears do?

[valentinpaun]

Ma poate ajuta cineva unde pot gasi o evacuare la turbina la un motor de 500 cai euro 3

[henryblanton]

So it’s a Geared Scavenger Turbo with a Viscous Coupling. Should last as long (maybe longer) as the Service Life of the Engine.

[someotherdude]

Mazda is bringing a rotary range extender to market in 2022 and will even sell them to Toyota. The rotary is not dead, it's an excellent choice for a range extender.

[VARITHMS]

Will the connection keep the turbo "spooled" at idle or when the truck is coasting?

[deanerichardson]

Interesting, did you all go back and research the turbine shaft problems that the US Army Air Corp had with turbine shafts in the Wright 3350 turbo-compound radial engine of the late 1940's up to the 1970's? They never did totally cure the breakage problems.

[davidsica]

What happens during startup, when that massive gear reduction is reversed? What happens in the setup during periods of inadequate exhaust output- say downhill? What kind of stresses does it produce? Is there a way that the system can be disengaged?

[celtisafricana]

Isn't it amazing how old technology get rehashed as new technology?

[miquel]

Are we getting this engine on the FH in Europe as well?

[alvarogeorgenobregeorge]

No SCANIA HAS SINCE 1989 on DS11.0 litler engine .

[SeraphoftheRoundTable]

Who else came here from Greg's video?

[novcha]

It's very complex engine. Very difficult to diagnostic and repair.