• Volvo XC70 with Darios hand controls for handicap driver
  • Volvo V70 with digital accelerator ring Darios and main hand brake
  • Volvo S60 with hand controls for disabled drivers
  • Volvo XC60 for driver with disability with handcontrols by Kempf


DARIOS - the digital accelerator ring which adapts itself to the speed of your vehicle - a world premiere for Volvo vehicles

Volvo V70 with hand controls for gas and brake
Volvo V70 with Darios and brake

DARIOS Description

DARIOS - (Digital Accelerator RIng Optimized for Speed) is worldwide the first accelerator which adapts itself to the speed of a vehicle. Its purpose is to give a high level of comfort and safety to a driver accelerating with his hands.

At low speed the acceleration is smooth, progressive and economical. It makes delicate manoeuvres during parking or backing up very easy. The gas consumption is reduced, because even a rough handling of the accelerator ring will not result in a rough acceleration, and so avoiding any over consumption.
However the full engine power of the vehicle always remains available.

At high speed the acceleration is dynamic and responsive making quick and precise moves like passing on the freeway very safe. It allows you to keep your hands on the wheel in an ergonomical and natural position requiring very little effort.

DARIOS constantly measures the speed of the vehicle and adjusts its reponse to give you an optimal level of comfort and safety while driving. DARIOS never reduces the full engine power which remains available at any speed.

To accelerate the ring is smoothly pushed toward the steering wheel with very little effort.
The needed effort remains constant at all time.

DARIOS can be installed on most vehicles with automatic transmissions.


Volvo S60 with digital hand controls for disabled drivers
Volvo S60 with Darios hand controls

Discover DARIOS-DUO with its "sport" mode ...
... a real pleasure to drive!

The version "duo" enables the driver to choose between two driving styles : "Standard" or "Sport" (also called "Fun" by some drivers) using a selector on the dashboard. In both styles Darios still adapts the acceleration response to the speed of the vehicle:

I - The "Standard" style gives the driver an excellent sensibility in acceleration, very smooth starts and an enjoyable and economical ride.

II - The "Sport" style gives the driver a dynamic sensation enabling him to skillfully get a very precise acceleration, fast starts and a real pleasure in driving while still enjoying all the advantages of the ring adapting its response to the speed of the car.


Volvo XC60 with digital hand controls
Volvo XC-60 with digital hand controls

Driving Comfort

DARIOS - (Digital Accelerator RIng Optimized for Speed ) is an accelerator ring on the steering wheel which adapts its response to the speed of the vehicle to provide you with exceptional driving comfort:

Very little effort is required to accelerate, and the driver can keep both hands on the steering-wheel.

The distance from idle to full throttle is only about 3/4 inch

The leather-covered ring turns freely on its cicular holder to enable a smooth acceleration coming out of a curve.


Volvo XC 70 with hand controls for drivers with disability
Volvo XC-70 with Darios hand controls

Elegant Design

The adaptation fits well in the car's interior, and the vision of the dashboard remains clear.

The distance between the accelerator ring and the steering-wheel is only about 3/4 inch.

As an option to improve the esthetics, the accelerator ring can be covered with leather matching the color of the steering-wheel.


Volvo V70 with hand controls for gas and brake
Volvo V70 with Darios and brake

Driving Safety

The digital accelerator ring is compatible with the driver's side airbag and with an airbag installed in the knee area.

The original pedals remain functional as well as all multifunctions and adjustments of the steering-wheel.

The main hand brake is a lever coming out of the dashboard, pivoting around one horizontal and invisible axis. The mechanical connection with the brake pedal is hidden behind the dashboard - therefore, in the event of a crash, the driver's legs will have no chance of coming in contact with any mechanical elements of the handcontrols : the car's passive safety is not compromised by the presence of the hand brake.

The digital transmission of the accelerator ring guarantees the level of safety of modern cars, by assuring to be insensitive to electromagnetic noise.


Darios Technology
Two sensors for safety

The Technology

DARIOS uses two sensors inside the steering wheel to comply with all car manufacturers’ safety requirements. All original electronic throttle pedals have two sensors to be immune to electromagnetic noise.
These two sensors are required to avoid unintended accelerations.

Be aware that any electronic accelerator using just one sensor can’t garantee the absence of unintended accelerations.

DARIOS uses a wired connection between the steering wheel and the dashboard to transmit the position of the accelerator ring to the gaspedal.

DARIOS sends digital signals through this connection because they are immune to electromagnetic noise.

DARIOS constantly senses the speed of your vehicle and adapts its response to be progressive at low speed and dynamic at high speed.
DARIOS requires the matching of two independent signals before deactivating the original throttle pedal and controlling the acceleration of your vehicle with signals identical to the original pedal.

Each steering wheel model is measured in 3D before installing the mechanism, the two sensors and the electronic circuit.
The position of the ring is sent twice every millisecond to the DARIOS electronic unit under the dashboard which controls the acceleration.


Volvo V-50 with hand controls for disabled driver
Volvo V-50 with Darios and brake

Airbag Deployment Tests

Darios - the digital accelerator ring has been tested in several airbag deployment tests performed by two car manufacturers and by an independent University laboratory, with the same result : The digital accelerator ring doesn't affect the deployment of the airbag.

The result of the airbag deployment tests:

Darios - the digital accelerator ring on the steering wheel doesn't affect the deployment of the airbag.


Test de Compatibilité Electromagnétique (CEM)

Darios - the digital accelerator ring was tested for electromagnetic compatibility by several car manufacturers in anechoic chambers and has been found to be in compliance with the European requirement E1 2009/19 EC for electromagnetic compatibility.

The result of all EMC Tests:

Darios is immune to electromagnetic noise. It is garanteed that with Darios you will never experience any unintended accelerations.


Kempf in Europe

Request a quotation or contact us at 1-888-4KEMPF-US or 1-888-453-6738..
Download a brochure.

“I’ve had people sit in my car and ask me, “How do you drive this? There aren’t any hand-control thingy’s here?” The throttle ring seems as if it belongs on the steering wheel.”

... read what our customers are saying.

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