When Irene was in England, she visited the transportation museum and was impressed with the large atmospheric steam engines on display.
2. An engine that operates by the energy of combustion of a fuel.
3. Any of various types of engines driven by energy produced by combustion.
2. A rocket engine in which the propellant is accelerated by some electric device.
2. An engine for space travel in which neutral plasma is accelerated and directed by external magnetic fields that interact with the magnetic field produced by electric current flow through the plasma.
The term plasma in these definitions refers to a gas-like state of matter consisting of positively charged ions, free electrons, and neutral particles.
Plasma is found in the stars, the sun, the solar wind, in lightning, and in fire.
2. A precision control of engine-spark timing and exhaust gas recirculation for emissions control and fuel efficiency.
2. An engine set up for propelling a flight vehicle which is based on the use of spark discharges through which intense electric and magnetic fields are established for times ranging from microseconds to a few milliseconds.
A resulting electromagnetic force drives the plasma along the leads and away from the spark gap.
2. An engine that provides thrust by expelling accelerated or high-velocity ions.
Ion engines using energy provided by nuclear reactors are proposed for space vehicles.
3. A type of rocket engine that generates thrust from the electrostatic acceleration of ionized particles.Diesel engines burn heavier oil than gasoline, and are more efficient than gasoline engines. They produce high torque at relatively low speeds which is ideal for trucks and buses.
External combustion engines; such as, steam engines, produce power less efficiently by burning fuel in an external chamber to heat a liquid or gas, which then moves a piston or a turbine.
Each piston in an internal combustion engine makes four "strokes"
- The piston moves down, sucking in air through the inlet valve while a tiny squirt of gasoline is injected into the air.
- The inlet valve at the top closes, trapping everything inside and then the piston moves up, squeezing the air and gasoline tightly together.
- When the piston reaches the top, a carefully timed spark sets fire to the gasoline; as the gas burns explosively, forcing the piston back down.
- Finally, the piston moves back up and pushes the burned gases out of the outlet valve which leave the car through the exhaust.
The four-stroke cycles include explosions inside the engine's cylinders, on top of the pistons, and the blast force pushes the pistons down; then, the crankshaft swings around and pushes the pistons back up for the next stage in the cycle. The cycles for one piston are described in the following sequences:
A jet engine moves a plane or car forward by firing a stream of hot gas backward; a scientific idea known as action and reaction or Newton's third law.
The steam pushes pistons back and forth to drive one or more wheels.