Each car/Truck has at LEAST TWO redundant systems, two motors and two compressors. Should a motor or compressor fail, the engine system can continue to function with only peak power affected. A motor/compressor can easily be removed and repaired on a bench while the car is used. Multiple independent axles ok. Motors can be stopped for low power needs maintaining efficiency from 5-1000+ Hp.
The compressor can be turned off and the motor for the compressor used to torque along side the motors. The air for combustion comes from special tank(s). During braking, the compressor stores compressed air that can be later used in motors. The more compressors there are, the more braking available, as well as optional short duration peak power with stored air.
The exhaust be be made to be cold or hot depending on the need. This is done by pressure and fuel variation in the motors. The water from combustion can be collected to allow hot water storage for a type of thermal battery (cold or hot). Vapor compression distillation can also be enabled with additions equipment so that water can be provided to the car from the fuels. About 1:1 ratio of water : fuel is enabled. Key feature.
The engine does not have a fuel type dependency like an Otto or Diesel engine has. You can use any of 14 fuels:
Gasoline, Diesel, Jet, 100LL, Ethanol, Methanol, bio Diesel, C8, C10, NH3, NH4OH, N2H2. propane, and Natural Gas.
Electricity from a battery can also be used via heating in the motors with normal compressed air as fluid and no combustion occurs. Normal combustion gives no NOx, HCs or soot...no smog...just CO2/N2 and water. Pure fuels like C8, C10, NH3, N2H2 lead to the lowest emissions due to purity of fuels. EVs don't come close in total.
Engine has option for 100% zero emission (no exhaust at all) with a CLOSED cycle (CO2 or N2) that combusts fuel and injected O2 and captures all emissions. The emissions are then turned into fuel by fuel maker at house/building over time between fills, thus recycling the CO2 over and over again. The fuel makers are driving by electricity from solar system on building.
Range of zero emissions depends on fuel tank size and number of tanks and pressures enabled. a range of 600-1000+ miles and more is enabled. No EV can come close to the range of a zero emissions combustion car.
A 6 kw electric generator/motor can be used to drive the car slowly (<25 mph) with super low gear to the electric motor. In neutral it can generate power for the house using fuel. This allows ~13 cent/kwh with $2.4/gal gasoline. This gives a person nearly grid costs from their car without the grid should grid power go out. It also allows camping electricity, and eliminates the need for generators for back up to grid or solar PV and other intermittent sources.