The old Diesel engine and transmission can be removed from an old semi truck (glider) and replaced with a New Engine Type with simple high/low/reverse gears. The old drive shaft can be used with old differentials. Basically all of the old "glider" body and hood can be used with ~ 1.8/3 times better fuel economy, HWY/City. The lower weight (3k lbs) with new engine can be used for shower, kitchen, toilet and water in old glider.
Cost would be around $70k with used glider.
Each axle can have it's own power system with multiple motors and compressors for redundancy for each axle. With a conventional USA semi tractor, the engine can be 3-4 times higher power (1600-2000 hp) for greater acceleration. The RPM range would be 0-4200, and not the old 900-1800 in old Diesels. The climb ability is 6% at 80 mph, 80k lbs. An all new tractor would have 2-3 axles with drives depending on needs. Each axle can be turned on or off as needed.
Brake recovery is used to recovery brake energy during decelerations. Unlike a Jake-Brake that dissipates the energy, the compressors stores the energy to be recovered and used later in NET engine. During long hills, excess energy is vented off and lost depending on tank sizes and hill length. Usually several compressors of different sizes are used allowing good resolution of the braking force in 5% increments up to 6% grade at 80 mph. Brakes are seldom used.
The acceleration would be sized for 80,000 lb and 0.15 G's, 0-60 in 18 seconds, 2 less than Tesla. It can be much more, if Tesla wants to play that game. The larger engine does not affect fuel economy, unlike old Diesel trucks. An old glider with a NET engine would be around 3k LBS lighter, 16k LBS for sleeper and 13k LBS for day cab, thus giving a 3k LBS advantage over a BEV and Diesel day or sleeper standard trucks. An all new tractor might be 10k LBS with shower, kitchen, toilet and water standard, less without.
The engine system is like having several independent engines working together. Should one fail, the other systems can continue driving with them disabled or shut down in part or whole. This eliminates most all brake downs, except for flat tires and running out of fuel. Axles can be turned off in the cruise, lowering wear on the engines.
One of several smaller motors (found in cars) is used for micro power for sleeping nights with heat/cooling and electricity comfort.
1,000,000 miles between overhauls min.
Many fuels can be used, such as Gasoline, Diesel, Jet, Ethanol, Methanol, etc.. Propane tanks are needed for NH3 and propane. Solar RE Electro fuels can be used, such as NH3, C8 and C10. Range on Diesel fuel is over 3600 miles on 300 gallons with old glider at 12 mpg (twice the old Diesel range), and 4,400 with new tractor (14.6 mpg). Fill time is 5 min for 3600-4400 miles. A 300-500 kwh BEV at 80% is 130-175 miles at 65 mph and 1-1.6 hrs for a 240-400 kwh charge, respectively, ~547x slower than fuel.