Throttle Posted on 23rd December 20155th May 2021 by ThePD (The Project Definition) A Throttle is a device or valve controlling the flow of fuel or power to an engine. Click to share on Twitter (Opens in new window)Click to share on Facebook (Opens in new window)Click to share on LinkedIn (Opens in new window) Related Posted in Technology and tagged device, mechanical. ThePD (The Project Definition) ThePD has been developing the Preferred Project Definitions based on the actual project execution and operation experiences and knowledge with the Project Language, and sharing with you daily basis.