Definition

Noun: 1. An internal combustion engine that uses natural gas as its primary fuel: A gas engine is a type of heat engine where the fuel (natural gas) is mixed with air and ignited inside cylinders to produce power through the controlled explosion of this mixture. It is mechanically similar to a gasoline engine but designed to operate on a gaseous fuel rather than a vaporized liquid.

Usage

The term "gas engine" specifically refers to an engine powered by combustible gas, most commonly natural gas (methane). It is crucial to distinguish this from the common but informal use of "gas" as a shortening for "gasoline" in American English. A "gas engine" in the technical sense does not use gasoline.

Examples

• Many factories use gas engines to generate electricity because natural gas is a readily available fuel.
• Compared to a diesel generator, the gas engine produced significantly lower emissions.
• The technician specialized in maintaining large industrial gas engines.

Advanced Usage

• Historical Context: In the late 19th and early 20th centuries, "gas engine" was a common term for early internal combustion engines that often used coal gas or town gas before the widespread adoption of gasoline.
• Technical Specification: In engineering contexts, the term specifies the fuel type, influencing design aspects like the fuel injection system, compression ratio, and ignition timing.

Variants and Related Words

• Natural gas engine: A more precise term that explicitly names the fuel, often used interchangeably with "gas engine."
• Internal combustion engine (ICE): The broader category to which gas engines belong.
• Gasoline engine / Petrol engine: A different type of internal combustion engine that uses liquid gasoline/petrol as fuel. This is a key distinction, not a variant.
• Dual-fuel engine: An engine that can operate on a mixture of natural gas and another fuel, such as diesel.

Synonyms

• Natural gas-fired engine
• Gaseous-fuel engine

Antonyms

• Diesel engine
• Gasoline engine / Petrol engine
• Steam engine
• Electric motor

Noun

1. an internal-combustion engine similar to a gasoline engine but using natural gas instead of gasoline vapor