Study Guide
- A gasoline engine is an internal combustion engine.
- In an internal combustion engine, the gasoline is combined with air and burned inside the engine.
- The space above the piston where the combustible mixture burns is called the combustion chamber.
- To reduce vibration during operation the crank shaft has counter weights to equal the weight of the connecting rod.
- Cooling efficiency of air cooled engines is improved through the use of cooling fins.
- Why do aluminum cylinder blocks have steel cylinder sleeves?
- Aluminum, being a soft metal, would wear out quickly due to the friction of the piston.
- Why is a woodruff key used on a shaft?
- This type of key cannot slip out during operation
- Valves are kept in alignment through the use of valve guides.
- A gasoline engine is a mechanism that transforms chemical energy to mechanical energy.
- The force applied to the piston is a result of the expansion or pressure of heated gases.
- Burned gasses are released through an exhaust valve following the power stroke of a piston.
- A fresh air/fuel mixture enters the combustion chamber through the intake valve.
- Gasoline is a petroleum product that is mainly a mixture of hydrogen and carbon.
- To perform useful work, the explosive force caused by burning gas must be contained and controlled.
- List four major parts of an internal combustion engine.
- Crankshaft, piston, connecting rod, crank case, exhaust valve, intake valve, valve spring, spark plug, coil, spark plug wire, cylinder head, cylinder head gasket, cylinder block etc.
- The crankshaft is a major rotating part of the engine.
- The piston is the straight line driving member of the engine.
- The piston is hollow to reduce weight.
- What is the purpose of the cam shaft?
- To open and close the valves.
- What are some functions that a flywheel can provide?
- Carries the momentum or inertia through the non-power strokes
- The fins are used to cool the engine much like a fan
- The magnets are used to produce an electrical current or spark