Electric Supercharger

Low cost electric supercharger for small vehicles
We are developing an electric supercharger (eSC) based on our patented TurboClaw® technology. Traditional superchargers are not viable on engines smaller than 2.5L. Our product is ideally suited to small engines (<1.2L) and has the additional advantages of being very small and compact making it very low cost at high volume manufacture.


Engine downsizing is changing how vehicles are designed and manufactured fundamentally. Automotive OEMs must identify ways to reduce engine displacement and CO2 emissions, whilst also increasing power. Where possible, these enhancements must be delivered with compact, low-cost and lightweight components that minimise adverse impact to powertrain configuration or manufacturing profitability. Responding to these changing demands, boosting companies have developed a number of solutions to these challenges, but none have yet improved significantly the low-end torque or optimised transient response on smaller engines (<1.2L). This is exactly where DBS’ innovative TurboClaw® electrically-driven supercharger, (eSC) could make a difference.

Design Features

  • High efficiency even at low flow rates.
  • Low speed and low impeller inertia.
  • Low cost, grease packed sealed-for-life bearings. 
  • Compact and light weight.
  • 12V and 24V versions available, subject to desired response time.

Proposed Downsized Engine System with eSC

Dual Charging

  • A turbocharger for higher engine speeds
  • A low flow-rate, engine speed independent, charging system for the lower engine speeds to boost torque and overcome turbo-lag

Engine Performance Improvements

The TurboClaw® compressor has been evaluated in a Hardware-in-the-Loop that simulated steady state and transient engine duty requirements. 
Results from eSC trials, sponsored by the UK Department of Trade and Industry’s Technology Strategy Board (TP BS088J) are depicted on the right.
The data show that the eSC was able to delver a 31% improvement in the torque of the engine at low revs. This allows a 1.0L engine to behave like a 1.4L engine at low revs. Additionally due the downsizing of the engine we were able to show a 12% reduction in CO2 emissions. 

On-going Development

DBS is currently developing the next generation of its eSC product based on TurboClaw® technology. Critical developments to deliver include compact packaging (around 1 litre and weighing less than 5kg), high efficiency, (compressor 65%, motor 95%, controller 95%), low cost mass manufacture, (target €100, £ 81 at >100,000 units/annum), and high temperature operation, (to 230° C). The new product is intended for HiL and vehicle evaluation in 2016. The mechanical, electrical, and control integration tasks for the vehicle, as well as track and chassis evaluation, will be supported by DBS OEM partners.


If you are interested in supporting the developement of this technology, please contact us at  [email protected]