🛠️ Invention or technique

Lenoir gas engine

Motor de combustión interna de gas (Lenoir)

Date
1860 · confidence high
Place
Paris, France
Credited to
Étienne Lenoir
Field
Matter & energy

⚠️ Disputed: the sources disagree.

What it is

The first commercial internal combustion engine, double-acting and without compression, fuelled by coal gas with electric ignition. Inefficient, but it demonstrated that internal combustion could drive workshops and vehicles (the Hippomobile, 1863).

Experimental precedents from De Rivaz (1807) and Barsanti-Matteucci (Florence, 1853-1854); Lenoir was the first to sell engines commercially (around 500 units).

What it led to

  • The four-stroke Otto engine (1876) and the petrol engine
  • Small-scale motorised industry without a steam boiler
  • The automobile (Daimler, Benz)
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Sources✓ verified 2026-09-25