Throttle grip

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Throttle twist grip on an NSU OSL 251

The throttle twistgrip is a control element for controlling the engine power by hand.

It is installed in particular on motorized two-wheelers and helicopters , but also on disabled vehicles , small outboard motors or ultralight aircraft .


In addition to the actual handle, the throttle twist grip consists of a sleeve that carries it and a housing that rotates the sleeve. The part of the sleeve located in the housing has circumferential grooves that guide a Bowden cable . A torque on the handle is converted into a tensile force that opens the throttle valve or slide ( slide valve carburetor ) and thereby increases the engine output. As the pulling force decreases, the springs close the throttle valve or slide and pull the throttle grip back into its starting position. An additional, counteracting Bowden cable is provided if it is to be ensured under all circumstances that the engine output can be reduced.

With the increasing use of electronic engine controls, more and more vehicle concepts are moving towards implementing the engine control via electronic actuation (via a Hall sensor in the throttle grip and a servomotor on the throttle valve) instead of a mechanical Bowden cable (ride-by-wire / drive). by-wire ).


Patent drawing from US Patent 765138 (registered 1903)

The throttle twist grip for motorcycles was developed and patented by Oscar Hedstrom during his time at Indian in 1904 .

On motorized two-wheelers, the twistgrip is usually on the right side of the handlebar. In DIN 73005 "Control levers for motorcycles" from May 1940, the right end of the handlebar is specified as a place for the throttle grip and the direction of rotation of the throttle grip is graphically defined with arrows.


When flying a helicopter, the pilot controls the collective pitch control with his hand using a lever and, at the same time, the engine or turbine output with the throttle grip attached to the top of the pitch lever .

Individual evidence

  1. US Patent 765138 (accessed January 8, 2014)