Studied from its original page
Zeuner / Reuleaux valve diagram (Das Diagramm von Reuleaux)
Reuleaux slide-valve diagram · Schieberdiagramm · rival members of the family in the same book: Zeuner's polar diagram and the diagrams of Deprez, Bilgram and Schorch
- Made by
- Franz Reuleaux (this diagram), presented by Gustav Zeuner beside his own polar diagram
- Year
- 1888
- Field
- Engineering
- Kind
- Computing chart
- Room
- Charts that compute

See the original page — Fig. 18, printed p. 57 (archive leaf n76)
Published 1888 (A) and both Zeuner (1907) and Reuleaux (1905) died long before 1955 (B ended 1977 at the latest).
The data it needs
crank angle ωinput (cyclic) · angle · degreeeccentricity ramplitude · quantitative · lengthadvance angle δphase · angle · degreeouter lap e, inner lap i, port width anamed thresholds · quantitative · length
Built in 6 steps, as its maker described
Erster Abschnitt, 'Das Diagramm von Reuleaux', pp. 56–58, Holzschnitt Fig. 18 p. 57; Deprez from p. 58, Bilgram from p. 61 (Fig. 20), Schorch from p. 63
121 other forms share this skeleton
Source
Zeuner 1888, Die Schiebersteuerungen, 5. Aufl.
Attribution checked against the source