Hot-bulb engine

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Notion

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Science and technology

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What Wikipedia says

The hot-bulb engine, also known as a semi-diesel or Akroyd engine, is a type of internal combustion engine in which fuel ignites by coming in contact with a red-hot metal surface inside a bulb, followed by the introduction of air (oxygen) compressed into the hot-bulb chamber by the rising piston.

Excerpt from the Wikipedia article “Hot-bulb engine”, under the CC BY-SA 4.0 license. Read the article on Wikipedia

Image: Tändkulemotor.png: NH / derivative work: Malyszkz (talk), Public domain, via Wikimedia Commons.