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Nicolaus Otto patents the four-stroke internal combustion engine

When
1876
Where
Deutz, Germany
Episodes
2

Nicolaus Otto developed the compressed charge internal combustion engine, culminating in the 1876 four-stroke cycle. While a 1862 patent by Beau de Rochas preceded the concept, Otto's practical implementation established the 'Otto cycle.' The engine's success relied on overcoming technical limitations of earlier atmospheric designs, leading to significant industrial adoption.

Episodes

  1. 1876 · Deutz, GermanyDevelopment of the Four-Stroke Engine

    Otto and Langen created the first internal combustion engine that compressed the fuel mixture prior to combustion, achieving higher efficiency than previous designs.

  2. 1876 · Deutz, GermanyAppearance of the Rings-Schumm Engine

    The engine developed by Franz Rings and Herman Schumm appeared in autumn 1876 and was immediately successful.

Background and detail

Background. Nicolaus Otto, a German engineer, founded NA Otto and Cie in 1864, the first company dedicated to internal combustion engines. By 1875, the company produced 634 engines annually, but the existing atmospheric engine design faced technical limitations, producing only 3 hp and requiring excessive headroom. This stagnation necessitated a new approach to engine efficiency.

Technical Development. The breakthrough occurred when Otto, aided by Franz Rings and Herman Schumm, developed a compressed charge engine. Unlike previous atmospheric engines, this design compressed the fuel-air mixture before ignition. The resulting four-stroke cycle, acknowledged as the 'Otto cycle,' achieved significantly higher efficiency than any engine created up to that time.

Patent and Legal Context. Although Otto is credited with the 1876 four-stroke engine, a lawyer discovered that a patent for the four-cycle concept had been issued to French engineer Beau de Rochas in 1862. This prior patent resulted in Otto losing one of his patents, allowing competitors like Daimler to sell engines in Germany without paying royalties.

People involved

Sources

  1. Nicolaus Otto Wikipedia, revision of 2026-09-14
  2. Four-stroke engine Wikipedia, revision of 2026-10-02

Machine-drafted from the cited Wikipedia passages and checked by a reviewing model, not by a human editor. Every passage cites the revision it was written from; dates and places follow those passages.