The external combustion chamber enables the engine to use diesel fuel in small engine sizes, giving it unique capabilities for unmanned aerial vehicle propulsion and other applications.

One advantage of utilizing zinc-air batteries for vehicle propulsion is that earth's supply of zinc metal is 100 times greater than that of lithium, per unit of battery energy.

The attraction of using hydrogen as an energy currency is that, if hydrogen is prepared without using fossil fuel inputs, vehicle propulsion would not contribute to carbon dioxide emissions.

Continuous tracks, also called tank treads or caterpillar tracks, are a system of vehicle propulsion in which a continuous band of treads is driven by two or more wheels.

The batteries that are used in vehicle propulsion are much larger, have a higher voltage and are more complex than the batteries that have been used in vehicle ignition.

Attempts were made to use free-piston gas generators for vehicle propulsion (e.g. in gas turbine locomotives) but without success.

The Lombard Steam Log Hauler, patented 29 May 1901, was the first successful commercial application of a continuous track for vehicle propulsion.

Common standards for the approval of hydrogen-powered engines are required in order to guarantee the safe use of hydrogen for vehicle propulsion.

The transit system then used only motor buses, but retained the name Johnstown Traction Company (in which "traction" is a reference to electric vehicle propulsion).

Three integrating accelerometers measured the three components of velocity resulting from vehicle propulsion.