AT Power Throttles patented “shaftless” technology explained. Power Starts Here.
In 2005, AT Power revolutionised butterfly throttle design with our patented ‘Shaftless’ technology, addressing its only significant drawback, airflow disruption. While butterfly throttles excel in idle and part-throttle control, traditional designs are hindered by the rotating blade and screws, which obstruct airflow and reduce efficiency.
The Problem with Traditional Butterfly Throttles, found in conventional throttles, rely on a thick shaft and screws to secure the butterfly valve. These components:
- Disrupt airflow
- Reduce flow velocity
- Decrease engine performance
AT Power’s Shaftless Solution
Our innovative, award-winning design eliminates the shaft from the throttle bore, supporting the blade at both ends. Key features include:
- Ultra-Thin Blade: Knife-edged leading and trailing edges minimise air separation.
- No Shaft or Screws: Eliminates obstructions, improving flow efficiency.
- Exceptional Performance: Achieves 99.5% of the airflow of an open bore, increasing volumetric efficiency.
Butterfly throttles feature a flat plate mounted on a rotating spindle, which opens and closes the passage to regulate airflow. These throttles can be controlled with high precision using either mechanical cables or electronic actuators.
Performance Benefits
- Up to 10% more airflow compared to traditional throttles of the same size.
- Higher airflow velocity for improved volumetric efficiency, horsepower, and torque.
- Ability to specify smaller throttle bores without compromising performance.
Inlet Geometry and R&D – AT Power invests heavily in R&D to optimise airflow through the throttle body, reducing flow separation and enhancing inlet geometry. Combined with precision CNC machining, we manufacture compact, lightweight throttles that outperform larger traditional systems.
Advantages of Butterfly Throttles
- Mechanical simplicity
- Cost-effectiveness
- Accurate control
- Superior part-throttle response
Butterfly throttles are widely used across motorsport applications, from grassroots racing through to Formula One, WEC, and WRC. As one of the oldest and most developed throttle systems, AT Power has pushed their development to the highest level of performance and reliability.
