four-stroke engines
Most car motors
Four-stroke engines are internal combustion engines that complete a power cycle in four distinct piston movements: intake, compression, combustion, and exhaust.
This design dominates automotive and motorcycle applications, offering better fuel efficiency and lower emissions than two-stroke alternatives.
Most cars run on four-stroke engines.
Also called four-cycle engines.
Reciprocating cylinder component
- crankshaftRotating engine shaft
- camshaftLobed rod operating valves
- valvetrainEngine valve operating system
- cylinderCircular-based solid form
combustion chamber · spark plug · intake valve · exhaust valve · cylinder head · timing belt · carburetor · fuel injection
Motorized two-wheeled vehicles
- automobilesSelf-propelled road vehicles
- lawnmowersMotorized grass-trimming machines
- generatorsDevices converting motion to electricity
- outboard motorsRemovable boat propulsion units
scooters · ATVs · go-karts · dirt bikes · snowmobiles · tractors · pressure washers · chainsaws
Vehicle efficiency rating
- thermal efficiencyUseful output per heat input
- compression ratioComparison of original to reduced
- direct injectionFuel sprayed into combustion chamber
- turbochargerExhaust-powered engine booster
intercooler · overhead cam · emissions · catalytic converter · fuel consumption
Fuel ignites in cylinders
- patentObvious; inventor's monopoly
- inventionNew device or method
- industrial revolutionRapid economic mechanization period
- horseless carriageArchaic term for automobile
piston
Reciprocating cylinder component
- crankshaftRotating engine shaft
- camshaftLobed rod operating valves
- valvetrainEngine valve operating system
cylinder · combustion chamber · spark plug · intake valve · exhaust valve · cylinder head · timing belt · carburetor · fuel injection · connecting rod
motorcycles
Motorized two-wheeled vehicles
- automobilesSelf-propelled road vehicles
- lawnmowersMotorized grass-trimming machines
- generatorsDevices converting motion to electricity
outboard motors · scooters · ATVs · go-karts · dirt bikes · snowmobiles · tractors · pressure washers · chainsaws · water pumps
fuel economy
Vehicle efficiency rating
- thermal efficiencyUseful output per heat input
- compression ratioComparison of original to reduced
- direct injectionFuel sprayed into combustion chamber
turbocharger · intercooler · overhead cam · emissions · catalytic converter · fuel consumption
internal combustion
Fuel ignites in cylinders
- patentObvious; inventor's monopoly
- inventionNew device or method
- industrial revolutionRapid economic mechanization period
- scootersscooter, scooters, kick scooter, push scooter, motor scooter
four-stroke engineselectric motors
Machines producing rotational force electrically
steam engines · jet engines · rocket engines · fuel cells · human-powered
stroke, engine, fours, fourth, fourths, fourteen, fourteenth, fortieth, strokes