Hyllion ERX - A Natural Gas Hybrid Electric Semi

[JSH]

This is Hyliion's new hybrid system. It is an electric truck with a natural gas powered generator to charge the battery. It can run EV only for 25 miles to enter EV only areas in cities and cruise 1,300 mile on a tank.

This is a great idea for a realistic way to transition long-haul trucking to alternative fuels. Natural gas stations already exist and NG trucks have very low emissions. It is likely actually simpler than a modern diesel truck with all the emission controls and little fuel economy tweeks.

https://www.hyliion.com/erx-page/#/performance

[MeteorGray]

Amazing it can hold enough CNG to run 1300 miles working a load. Or can it?

[Piotrsko]

Using 6mpg, you need 216 gallons of diesel so perhaps 1000 gallon high pressure gas. The tanks shown look almost big enough for1/2 that, one on each side.

The CNG transit vans I drove had a 50 gallon tank where the gasoline tank was but I could only get maybe 60 miles out of it before refill. Some days I refilled 3 times.

[cRiPpLe_rOoStEr]

Originally Posted by Piotrsko

The CNG transit vans I drove had a 50 gallon tank where the gasoline tank was but I could only get maybe 60 miles out of it before refill. Some days I refilled 3 times.

Do you remember how many GGEs it could hold?

[JSH]

Originally Posted by MeteorGray

Amazing it can hold enough CNG to run 1300 miles working a load. Or can it?

It has a side tank on each side and a giant cabinet tank behind the cab.

Also as a hybrid it should be more efficient than CNG converted diesel.

EDIT: I believe the 1300 mile range is for liquid natural gas which is about 4x denser than compressed natural gas.

[Piotrsko]

Originally Posted by cRiPpLe_rOoStEr

Do you remember how many GGEs it could hold?

The outfit I worked for was hugely non technical, so, unfortunately no. They had issues scheduling how far I could run before refueling even after I gave them a tank range.

Liquid gas is comparable to gasoline for BTU content, so if that's the case 1300 miles is much easier.

[redpoint5]

I wonder what happened to that one guy who was on a mission to improve MPGs on a huge fleet? He kept going on and on about HHO, insisting that testing proved a benefit.

[JSH]

Some more detail now that I have access to a computer:

Agility LNG side tanks are up to 160 DGE each
Agility CNG side tanks are up to 60 DGE each
Agility CNG Cabinet tanks are up to 175 DGE

[redpoint5]

What is a DGE? Distance per Gallon Equivalent?

[samwichse]

Originally Posted by redpoint5

What is a DGE? Distance per Gallon Equivalent?

Diesel gallon equivalent