Throttle - what a wonderful word!
Throttle. Marvellous. It sounds & feels satisfying to say. It conjoures up images of Spitfires and the early days of aviation for me. You know that someone knows about engines when they refer to a throttle rather than an accelerator or some other comparatively banal terminology - perhaps a racing driver, but definitely a Spitfire pilot and certainly my Dad. I also like the fact that more throttle means less restriction on the fuel supply, so technically less throttling being done! Presumably the issue the throttle was created for was to limit the speed of an engine rather than increase it. Here's a Wikipedia description for those wanting some technical detail.