"Engine throttle" refers to a device or control that regulates the amount of fuel or air going into an engine. It helps in controlling the speed and power output of the engine. Full definition
Being a highly - tuned, normally - aspirated engine throttle response is razor sharp, which means you can precisely manipulate the rear axle under power. (evo.co.uk)
ESC applies brake pressure to alternating wheels and can adjust engine throttle if necessary to help you maintain stability. (palmendodgechryslerjeepofracine.com)
It does not lower the total volume of gas inhaled by the engine as in a gasoline engine throttle. (mechanics.stackexchange.com)