Hot-tube ignitor

Hot-tube ignitor

A hot-tube ignitor was an early device that fit onto the cylinder head of an internal-combustion engine and ignites the compressed fuel/air mixture by means of a flame heating part of the tube red hot. A hot-tube ignitor consisted of a metal or porcelain tube, closed at one end and attached to the cylinder head at the other, and an adjustable burner that could be moved to position its flame at any point along the length of the tube.

The compression stroke in the cylinder pushed some left over combustion products in the tube followed by fresh (unburned) fuel/air mixture. When the compression was enough that the fuel reached the red hot area of the tube, ignition occurred. On early designs, ignition timing was adjusted by adjusting the position of the red hot spot on the tube -- this was accomplished by moving the burner along the length of the tube. Most later styles used a fixed burner and varied tube lengths to change ignition timing.

Hot-tube ignitors had many problems, most caused by the sudden pressure changes in the tube because of the operation of the engine and the high temperature of the tube. It was very hard to find materials that were both durable enough for these conditions and inexpensive.

It was also very important never to make the mistake of setting the burner flame so that it heated the tube white hot, which rapidly damaged the tube and could cause it to burst explosively. This was an easy mistake to make and happened all too often.

The tubes used were typically 6 to 12 inches long, which tended to make them impractical for use on anything but large engines (e.g., stationary motors in factories). Tubes rarely lasted longer than a year before needing replacement, especially when the engines were fueled with high sulfur gases like unpurified producer gas or high sulphur natural gas.


*cite book
last = Hiscox
first = Gardner Dexter
title = Gas, Gasoline, and Oil-Engines including Producer-Gas Plants A complete and practical work treating on gas, gasoline, kerosene, and crude petroleum oil-engines, including producer-gas plants for gas-engine owners, gas engineers, and intending purchasers of gas-engines, fully describing and illustrating the theory, design, construction, and management of the explosive motor for Stationary, Marine, and Vehicle Motor Power
edition = Twentieth edition, revised and enlarged
publisher = Norman W. Henley Publishing Company
location = 132 Nassau Street, New York, U. S. A.
year = 1911
pages = pp. 122-127

External links


Wikimedia Foundation. 2010.

Игры ⚽ Нужно сделать НИР?

Look at other dictionaries:

  • Hot tube engine — The hot tube engine is a relative of the hot bulb engine with better timing control. The hot bulb engine only ran well at one speed and a low one at that, typically 100 RPM. The timing of a hot tube engine is controlled by means of varying the… …   Wikipedia

  • Ignitor (disambiguation) — Ignitor may mean:*An ignitor is a device used to trigger an explosive reaction, more commonly called a detonator. *Ignitor, a heavy metal band from Austin, Texas.An ignitor is also a part of the ignition system of an internal combustion engine… …   Wikipedia

  • Crossley — For people named Crossley, see Crossley (surname). Crossley, based in Manchester, United Kingdom, was a pioneering company in the production of internal combustion engines. Since 1988 it has been part of the Rolls Royce Power Engineering group.… …   Wikipedia

  • Split cycle engine — The split cycle engine is a type of internal combustion engine. Design In a conventional otto cycle engine, each cylinder performs four strokes per cycle: intake, compression, power, and exhaust. This means that two revolutions of the crankshaft… …   Wikipedia

  • Furnace — For other uses, see Furnace (disambiguation). Industrial Furnace from 1907 A furnace is a device used for heating. The name derives from Latin fornax, oven. In American English and Canadian English, the term furnace on its own is generally used… …   Wikipedia

  • Metal-halide lamp — A metal halide gas discharge lighting system provides illumination for a college baseball game at Olsen Field in College Station, Texas, United States. Note the various colors of the lights as they warm up. Metal halide lamps, a member of the… …   Wikipedia

  • Components of jet engines — Diagram of a typical gas turbine jet engine. Air is compressed by the fan blades as it enters the engine, and it is mixed and burned with fuel in the combustion section. The hot exhaust gases provide forward thrust and turn the turbines which… …   Wikipedia

  • Thermostat — This article is about the temperature regulating device. For the French cooking oven temperature scale, see Gas Mark#Other cooking temperature scales. Honeywell s iconic The Round model T87 thermostat, one of which is in the Smithsonian …   Wikipedia

  • Headlamp — Headlight redirects here. For other uses, see Headlight (disambiguation). High Beams redirects here. For the urban legend also known by that name, see Killer in the backseat. A motor scooter s front with an impractical number and variety of… …   Wikipedia

  • Nuclear fusion — Nuclear physics Radioactive decay Nuclear fission Nuclear fusion Classical dec …   Wikipedia

Share the article and excerpts

Direct link
Do a right-click on the link above
and select “Copy Link”