Definition

Noun: 1. An internal combustion engine that uses gasoline as its fuel: A gasoline engine is a type of heat engine where fuel (gasoline) is mixed with air inside a cylinder, compressed by a piston, and ignited by a spark plug. The resulting combustion creates high-pressure gases that drive the piston, converting chemical energy into mechanical motion to power a vehicle or machine.

Examples of Usage

• Noun:
  • The classic car is powered by a simple yet robust gasoline engine.
  • Modern gasoline engines are designed to be more fuel-efficient and produce fewer emissions.
  • Hybrid vehicles combine a gasoline engine with an electric motor.

Advanced Usage

• Technical Context: In engineering, the term specifies the fuel type and ignition method (spark-ignition), distinguishing it from diesel engines (compression-ignition).
  • The efficiency of a gasoline engine is heavily influenced by its compression ratio and ignition timing.

Variants and Related Words

• Gas engine (n): A common, shortened synonym for "gasoline engine." (Note: In some regions, "gas" is short for "gasoline," not natural gas).
• Petrol engine (n): The British English equivalent term.
• Internal combustion engine (ICE) (n): The broader category to which gasoline engines belong.
• Spark-ignition engine (n): A technical term highlighting the ignition method used in gasoline engines.

Synonyms

• Petrol engine (UK English)
• Gas engine (informal, region-dependent)

Related Phrases

• Four-stroke gasoline engine: Specifies the most common thermodynamic cycle (intake, compression, power, exhaust) used in automotive engines.
  • Nearly all modern cars use a four-stroke gasoline engine.
• Two-stroke gasoline engine: Specifies a different, often simpler cycle common in smaller machinery like chainsaws and mopeds.
  • The lawn equipment is powered by a two-stroke gasoline engine.

Noun

1. an internal-combustion engine that burns gasoline; most automobiles are driven by gasoline engines