ALABC and CPT show 48V LC Super Hybrid : John Day's ...

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12V and 48V LC Super Hybrid demonstrators feature an electric supercharger developed by CPT and acquired by Valeo for high volume production

The Advanced Lead-Acid Battery Consortium (ALABC) and Controlled Power Technologies (CPT) will showcase their 48 volt LC Super Hybrid technology demonstrator at the International Vienna Motor Symposium.

The LC Super Hybrid, based on a 1.4 litre VW Passat family sized saloon, will debut at Austria?s 34th annual powertrain conference. The 48V LC Super Hybrid aims to demonstrate 120g/km, combined with an impressive 0 to 100kph acceleration in less than nine seconds, in a large family car.

Employing low voltage micro-mild hybrid technology, the 48 volt version of the LC Super Hybrid complements the 12 volt technology demonstrator unveiled at the Geneva Motor Show in 2012.? The 48 volt demonstrator offers additional functionality, including torque assist to the petrol engine for launch and low speed transient acceleration; optimised fuelling during idle and motorway cruise conditions, with electric assist ?load point moving? and a leaner fuel calibration; in-gear coast-down, and the ability to harvest significantly more kinetic energy from regenerative braking.?? It combines advanced lead-carbon batteries with CPT?s production-ready SpeedStart? motor-generator system.

The vehicle also includes production-ready electric boosting technology sold by CPT to Valeo.? Other international companies involved are powertrain developer and systems integrator AVL, drive belt specialist Mubea, and battery management systems provider Provector.?

?Our 48 volt demonstrator will assist global carmakers in their technical due diligence, engineering validation and industrialisation of 48V-based micro-mild hybrid vehicles that motorists can afford to buy,? says CPT chief executive Nick Pascoe, ?particularly as we?re now seeing rapidly maturing definitions of 48 volt architectures by leading international carmakers, supported by the global tier 1 supply base, and increasingly diverse powertrain and vehicle applications coming from the market.?

4-8 per cent fuel economy improvement

?We expect to gain an additional 4-8 per cent fuel economy improvement over the 1,450kg kerb weight, 12 volt LC SuperHybrid, which already achieves 50mpg imperial (42mpg US and 5.6l/100km) and 130g/km on the NEDC New European Drive Cycle and significantly more miles per gallon in real world driving ? while delivering the performance and driveability of a 2-litre class vehicle.?

?Mild electrification of the powertrain deploying more than 12 volts, but keeping it safely less than 60 volts, combined with new generation advanced lead-carbon batteries, which offer high power density and feature capacitive negative electrodes with added carbon, which have been shown to tolerate the relentless charging and discharging in this micro-mild hybrid application, will be a major factor in providing carmakers with the required energy efficiency and affordability,? says Allan Cooper European projects coordinator at the Advanced Lead-Acid Battery Consortium, commenting on the ability of lead-carbon batteries to absorb very high power (high current) charge pulses of brake energy and provide high current discharge pulses for frequent engine cranking and torque assist. Most significantly this low voltage micro-mild hybrid technology with nominal 1kWh batteries included can be achieved at a quarter of the add-on costs normally incurred with a full hybrid or electric vehicle.?

Emerging low voltage mild hybrid standards

Emerging low voltage mild hybrid electrification standards, led by the German VDA, but with vehicle OEM and tier 1 defined variations, provide an ideal solution for reducing carbon emissions, without compromising performance or adding significant manufacturing cost.? The 48 volt standard will help in the development of a new generation of affordable super fuel efficient low carbon cars that retain petrol and diesel engines, albeit as radically downsized powertrains, which could also run on a new generation of man-made and environmentally friendly hydrocarbon fuels.?

With EU-led global CO2 emission targets rapidly converging on 130g/km by 2015 and 95g/km by 2020, President Obama?s shake-up of the US car industry, which is aiming for 70-80g/km by 2025 and with 60-70g/km a possible EU target for 2025 or 2030, the auto industry has to achieve continued significant reductions putting pressure on carmakers to come up with ever more innovative and affordable technical solutions.?

?Much of this legislation can be accommodated cost effectively through low voltage hybridisation of advanced petrol and diesel engines supported by kinetic and thermal energy recuperation,? says Pascoe.? ?Even battery technology and cost inhibited pure electric vehicles produce the equivalent of 130g/km of carbon dioxide emissions if the electricity is supplied by coal fired power stations, which still provide the dominant source of the world?s electricity.?

30 percent reduction in CO2 emissions

Pascoe says the auto industry has reckoned the additional cost to the motorist of deploying a 48 volt micro-mild hybrid solution to achieve a 30 percent reduction in CO2 emissions can be as little as ?1,000 ($1,500) for the equivalent performance of a current 2-litre family sized saloon depending on the base vehicle specification and electrical architecture deployed.? This is significantly less than the ?5,000 UK plug-in car grant, ?7,000 French government subsidy, similar tax incentives provided by many other EU member states, incentives up to 60,000 Yuan (US$9,700) in China and up to $7,500 US federal subsidies with specific incentives and tax exemptions for BEVs and PHEVs in a number of US states; an on cost for electric vehicles that would seem to remain unavoidable unless there is a significant chemistry breakthrough to reduce the cost and complexity? of the electronic and thermal management requirements of the high energy density Li-ion batteries required for plug-in hybrids and battery electric vehicles.?

The 12V LC Super Hybrid vehicle has been tested extensively.? ALABC and CPT expect to release comprehensive performance data regarding the 48V vehicle fuel economy and energy management later in the year, after which both vehicles will be available for evaluation and back-to-back comparisons.

Other posts you may be interested in reading:

1. CPT developing 48 volt electric supercharger
2. Ricardo HyBoost car aims for 30-40% CO2 reduction without compromising performance
3. KPIT Cummins, Bharat Forge form joint venture to develop intelligent plug-in parallel hybrid solution, REVOLO

Source: http://johndayautomotivelectronics.com/?p=14083

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