Internal combustion engines 435 Combustion engineering 149 Automobiles 94 Motors 79 Combustion 60 Design and construction 57 Fuel systems 49 Internal combustion engines, Spark ignition 42 Testing 34 Diesel motor 22 Spark ignition engines 21 Mathematical models 20 Environmental aspects 19 Fluid dynamics 18 Maintenance and repair 18 Two-stroke cycle engines 18 Heat 17 Transmission 17 Exhaust gas 15 Valves 14 Cylinders 13 Computer simulation 12 Ignition 12 Noise 12 Control systems 11 Thermodynamics 11 Biodiesel fuels 10 Internal Combustion engines 10 Internal combustion engine 10 Motor vehicles 10