The dihedral synchro-helix actuation door system is a type of door with a hinge mechanism which allows the doors to rotate 90° by sweeping outwards and upwards at the hinge. It was designed and developed by

Christian von Koenigsegg Christian Erland Harald von Koenigsegg (born July 2, 1972) is a Swedish automotive engineer and entrepreneur. He is a descendant of the House and lineage of the Koenigsegg, a noble family from Germany. He is the founder and CEO of the Swedish hi ...

on behalf of high-performance sports cars manufacturer, Koenigsegg Automotive AB. It was conceived as revolutionary when it made its debut on the CC prototype (1994–2000). The first production car to be fitted with these doors was the

Koenigsegg CC8S The Koenigsegg CC8S is a mid-engine sports car produced by the Swedish automobile manufacturer Koenigsegg. It was the company's first production automobile and the first production car to use the company's trademark dihedral synchro-helix actuation ...

(2002–2003). The door's primary intention was to open high enough to avoid most curbs, but low enough to avoid garage ceilings. It also minimizes the space taken at the side of the car while opening the door, which makes it easier to open the doors while being parked on tight spaces with another parked car at the side. The

Koenigsegg Regera The Koenigsegg Regera is a limited production, plug-in hybrid grand touring sports car manufactured by Swedish automotive manufacturer Koenigsegg. It was unveiled at the March 2015 Geneva Motor Show#2015, Geneva Motor Show. The name Regera is a ...

was the first car to be equipped with Autoskin, a feature which allowed this mechanism to be completely motorized by making the door sweep automatically by pressing a button. These doors are found on all Koenigsegg cars which includes: *

Koenigsegg Agera The Koenigsegg Agera is a Mid-engine design, mid-engine sports car produced by Swedish car manufacturer Koenigsegg. It is a successor to the Koenigsegg CCX, CCX/Koenigsegg CCX#CCXR, CCXR. The name comes from the Swedish verb 'agera' which means ...

* Koenigsegg Agera Final * Koenigsegg Agera R *

Koenigsegg Agera RS The Koenigsegg Agera is a mid-engine sports car produced by Swedish car manufacturer Koenigsegg. It is a successor to the CCX/ CCXR. The name comes from the Swedish verb 'agera' which means "to act" or in imperative form "(You) act". It was n ...

Koenigsegg CC The Koenigsegg CC is a prototype car made by the Swedish automobile manufacturer Koenigsegg. Overview Work on the car started in 1994. Koenigsegg wanted to build a sports car that could exceed the standards set by the McLaren F1 at the time, and ...

* Koenigsegg CC850 * Koenigsegg CCR *

Koenigsegg CCX The Koenigsegg CCX is a Mid-engine design, mid-engine sports car manufactured by Swedish automotive manufacturer Koenigsegg, Koenigsegg Automotive AB. The project began with the aim of making a global car, designed and engineered to comply with ...

Koenigsegg CCXR The Koenigsegg CCX is a mid-engine sports car manufactured by Swedish automotive manufacturer Koenigsegg Automotive AB. The project began with the aim of making a global car, designed and engineered to comply with global safety and environment ...

* Koenigsegg CCXR Trevita *

Koenigsegg Jesko The Koenigsegg Jesko is a limited production mid-engine sports car produced by the Swedish automobile manufacturer Koenigsegg. The car was introduced at the Geneva Motor Show#2019, 2019 Geneva Motor Show and was completely sold out before the s ...

* Koenigsegg One:1 *

Koenigsegg Gemera The Koenigsegg Gemera is a limited production four-seat plug-in hybrid grand tourer (or 2-door sports saloon) to be manufactured by the Swedish automobile manufacturer Koenigsegg. It was unveiled on 3 March 2020 at an online broadcast by Koenig ...

Peugeot HR1 The Peugeot HR1 is a concept car that was designed by Peugeot for the 2010 Paris Motor Show. It is a supermini SUV and features an innovative hybrid powertrain. Instead of using a diesel linked to an electric motor like in the Peugeot 3008 and Peu ...

Mercedes-Benz F200 The Mercedes-Benz F 200 "Imagination" coupe is a concept study by then Daimler-Benz unveiled at the 1996 Paris Motor Show. The goal was to show off innovations in control, design, and comfort in passenger cars. The car's exterior design was in par ...

This door system isn't without its flaws. When the door is opened while the battery is connected, the power window opens down a quarter of the way. This is because if the battery fails or is disconnected, and the door is opened, the window will not open. If the door and bonnet are open at the same time, this can cause a collision between the bonnet and the door window, which can damage the bonnet. As a preventive measure, all cars with these doors come with a warning label visible when the door is open:

ATTENTION: ''Always avoid operating the bonnet and the doors at the same time when the battery is out/off. This is in order to avoid potential risk of collision resulting in scratches on the hood.''

The warning also has dimensions of interval between the car and other obstacle placed near it which is recommended to be followed. The dimensions mentioned are a distance of 40 cm of gap towards the sides of the car and 10 cm of gap between the door at its open position to avoid any curbs present.

References

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External links

US Patent 10,662,687
patent on the mechanism by Koenigsegg Car doors Koenigsegg vehicles