Hyllion ERX - A Natural Gas Hybrid Electric Semi
 

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

https://i.ytimg.com/vi/Sn4hI7CjcEY/maxresdefault.jpg

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

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.

Do you remember how many GGEs it could hold?

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.

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.

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.

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

What is a DGE? Distance per Gallon Equivalent?

Diesel gallon equivalent