Talk:Herbert Akroyd Stuart

Untitled
I thought Akroyd-Stewart invented the direct injection known as "airblast injection"? Swatoa 21:28, 7 July 2006 (UTC)

To me this page seems to be a try to put an opinion over. There are some parts that I find questionable, I would like some references so I would not have to hunt up the facts myself. If I do not find some references posted in a fesw weeks I will start hunting up references for the full subject of high compression engines (Diesel and other) and probably write an overwiew article with references. If I just start editing I am afraid that it will start a edit war, I have a feeling that some POVs are strong. Seniorsag 17:36, 15 February 2007 (UTC)

patent dispute
quote from hot bulb

""Akroyd-Stuart's heavy oil engine (compared to spark-ignition) is distinctly different from Rudolf Diesel's better-known engine where ignition is initiated through the heat of compression. An oil engine will have a compression ratio of about 3:1, where a typical Diesel engine will have a compression ratio ranging between 15:1 and 20:1. Furthermore fuel was injected during the intake stroke and not at the end of the compression stroke as in a diesel. "" Wdl1961 (talk) 00:20, 21 December 2008

It seems to me that the diesel or hot bulb principle was actually known hundreds if not thousands of years before in the East Indies. It was applied to the fire-piston, which was a bamboo cylinder containing tinder which was ignited by the heat produced by the compression of air when a sharp rap was given to the piston. It is perhaps still used by the tribes of Indonesia to make fire.

This article describes no patent dispute; so why the heading? Ttocserp 11:53, 30 May 2015 (UTC) — Preceding unsigned comment added by Prkprescott (talk • contribs)

Hyphen
Is there any well-sourced consensus on the hyphen between Akroyd and Stuart? Should it exist or not? Ran into this over on Diesel engine. Thanks. Kajabla (talk) 15:24, 23 June 2016 (UTC)

"spilt"?
"Spilt" is not the common spelling of "spilled" today, even in British English. — Preceding unsigned comment added by 23.119.204.117 (talk) 01:18, 19 December 2016 (UTC)

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"Hot bulb engines were produced until the late 1920s"
It is claimed that "Hot bulb engines were produced until the late 1920s". [] says they where produced until the 1950s. I read somewhere else (source unknown) that Vierzon built tractors with this type of engine until the 1950s. May be 1920s should be changed. — Preceding unsigned comment added by Rudipedia (talk • contribs) 15:50, 14 February 2022 (UTC)


 * Lanz Bulldog tractors with hot-bulb (Akroyd) engines (50 and 60 PS) were made until 1957. The last Bulldog engines were direct-injected hot-bulb engines which have a higher ε-number than normal hot-bulb engines (id est a compression ratio comparable to a 2022 DI Turbo petrol (Otto) engine), but still, they have no compression igntion, and they retain their hot-bulb ignition. This makes them almost as efficient as antechamber-injected 1950s Diesels – however, their BMEP figures are still very low (<0.5 MPa) even when compared against the most archaic Diesels. Direct-injected hot-bulb (Akroyd) engines are also known as "half diesels" because of their increased compression ratio and their fuel (direct-injected Akroyds were designed with fuel injectors unsuited for fuels other than DIN-51601-compliant Diesel fuel, which is different from "bog standard Akroyds" that can use virtually any liquid petroleum product as fuel). Best regards, --Johannes (Talk) (Contribs) (Articles) 17:49, 14 February 2022 (UTC)