Automobiles 266 Design and construction 137 Motors 63 Motor vehicles 55 Electronic equipment 32 Internal combustion engines 28 Testing 27 Dynamics 26 Technological innovations 25 Automobiles, Racing 18 Diesel motor 18 Exhaust gas 18 Fuel systems 16 Fuel cells 15 Hybrid electric vehicles 15 Materials 14 Electric vehicles 13 Environmental aspects 13 Safety measures 13 Brakes 12 Pollution control devices 12 Spark ignition engines 12 Aeronautics 11 Safety appliances 11 Automatic control 10 Automotive computers 10 Computer control systems 10 Electric equipment 10 Mathematical models 10 Mechanical engineering 10