Partial hybrids offer emissions compromise

Controlled Power Technologies claims that its retro-fitted hybrid technology can deliver between 15 and 25 per cent CO2 reduction with an additional cost to the vehicle manufacturer of between €750 (£635) and €1500 (£1269).

This compares with a CO2 reduction upwards of 30% for full plug-in electric hybrids but with additional manufacturing costs of between €6000 (£5077) and €10,000 (£8461). 

‘The concept approaches full hybrid CO2 reduction potential, but at a much lower cost and without compromising dynamic performance,’ said Guy Morris, engineering director and chief technical officer at CPT.

So-called ‘micro’ and ‘mild’ hybrids incorporate a downsized internal combustion engine alongside a combination of stop-start functions, electric superchargers, integrated starter generators, and energy storage systems. They cannot, however, drive on electric alone like full hybrids.

The batteries used to power these add-ons tend to be small, low cost and can be charged quickly from mains outlets.

CPT’s initial demonstrator, called the low carbon super hybrid, is based on the engine from the 1.4 Bluemotion Volkswagen Passat family saloon.