Throttle

Throttles are a part of the intake system used to modulate engine output.

Throttle form factors

now that I think about this, I think the rabbit hole details for throttle like cabling and non-butterfly throttles should get a separate page - will do later if y'all dont (-simon)

Cabling

If using a cable actuated throttle, the choice and routing of cable are important considerations. A push-pull cable has negligible stretch/flex over time and will give the greatest consistency [citation needed for strecth comparison].

Other popular choices are shifting and brake cables used on bicycles. [structure of bike brake cable v shifter cable]. A brake cable will always have some stretch, and a thicker gage will stretch less.

Cable fittings are either swage or swageless. Swage fittings are permanently attached by crimping (swaging). Swawgeless fittings can be attached to the cable in a number of ways including set screws or collets. [citation for fittings] Swageless fittings allow for a degree of adjustment as the cable stretches.

[insert image of swageless v swage fittings]

Dry lube like graphite or molybdenum disulfide are the best go to for high quality cable sheathing. However, if the cable is in a wet/humid environment or the sheathing is old or slightly damaged, a liberal dose of a high quality oil such as motor oil is desirable[ciitation needed]. Non-synthetic oils like mineral oil can degrade the cable housing [citation needed]. WD-40 may also degrade the housing and will dissolve the lubricant applied to the cable by the manufacturer [citation needed].

Further reading here: <a href="https://www.sheldonbrown.com/cables.html">https://www.sheldonbrown.com/cables.html</a>

add routing info also

Electronic Throttle Control

Main page: Electronic Throttle Control

overview and driving rationale how it fits into system not specific design info