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48V

[Due to the increasing size of the archives, each topic page now contains only the prior 365 days of content. Access to older stories is now solely through the Monthly Archive pages or the site search function.]

Frost & Sullivan projects Volkswagen Group to be the leader in 48V systems over next 10 years

June 15, 2015

In a new report on the prospects for 48V automotive systems (earlier post), consultancy Frost & Sullivan forecasts that the Volkswagen Group will lead in this area primarily because of Audi’s 48V offering (earlier post). The consultancy projects that by 2025, Volkswagen Group will have 48V volumes in excess of 1 million systems in North America and Europe combined, far exceeding its competition.

The report, “The 48V Power-net Market in Europe and North America”, projects that by 2017, Audi and PSA will be the front-runners in Europe, while in North America, the major push is expected by the German OEMs.

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Audi power-dense 2.5L TFSI engine with electric biturbo delivers 591 hp from 2,480 cc; 48V subsystem for the turbo

May 09, 2015

At the Wörthersee festival, Audi is showcasing the Audi TT clubsport turbo technology concept equipped with a new 2.5 TFSI gasoline engine with an electric biturbo (earlier post) that delivers 441 kW (591 hp) and 650 N·m (479.4 lb-ft), with acceleration from 0 to 100 km/h (62.1 mph) in 3.6 seconds. Peak torque is available from 3,000 to 7,000 rpm. Power is transferred via a manual six-speed transmission.

While production car engines with this level of output are available from a number of mainstream OEMs, the displacement of the Audi engine is about half or less that of the others, resulting in a very power- and torque-dense unit. The five-cylinder, 2,480 cc engine produces 178 kW (239 hp) and 262 N·m (193 lb-ft) per liter of displacement. By comparison:

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Hyundai showcasing new Tucson 48V Hybrid Concept and diesel Plug-in-Hybrid Concept at Geneva

March 08, 2015

Hyundai Motor is showcasing a range of innovative fuel efficiency and connectivity technologies at the 2015 Geneva Motor Show, among them a 48V Hybrid concept and a plug-in hybrid vehicle concept, both based on the all new Tucson platform.

The 48V Hybrid combines a 2.0-liter diesel model with 134 hp (100 kW) and a six-speed manual transmission along with a 14 hp (10 kW) electric motor; combined system performance is 148 hp (110 kW) and 413 N·m (305 lb-ft) of torque. This boosts system power by 10% while emitting only 109 g/km CO2. Compared to a full hybrid system, the 48V system delivers similar efficiency, for only a quarter of the cost.

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ALABC showcased three 48V hybrid demonstrators at AABC featuring advanced lead-carbon batteries

February 10, 2015

The Advanced Lead Acid Battery Consortium (ALABC) last month showcased three hybrid electric concept vehicles resulting from its R&D program that demonstrate the real-world potential of lead-carbon batteries in 48V architectures. The cars, two of which were produced in association with major OEMs (Ford and Hyundai/Kia), exhibit substantial environmental and fuel-efficient benefits through low-cost hybridization. The vehicles were part of the ALABC display at the Advanced Automotive Battery Conference (AABC Europe 2015) held at the Rheingoldhalle in Mainz, Germany.

All three vehicles feature advanced lead-carbon batteries, also known as carbon-enhanced lead-acid batteries. The batteries, Exide’s spiral-wound Orbital AGM and East Penn Manufacturing’s UltraBattery (the latest model of which was also on display at the ALABC stand), are some of the most effective lead-carbon designs for 48V hybrid electrification, ALABC said.

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Calls for an international 48V electrical standard for vehicles; looming WLTP implementation

December 01, 2014

At the 2nd International Conference Automotive 48 V Power Supply Systems, held last week in Düsseldorf, Germany, Controlled Power Technologies (CPT), a major sponsor of the event, together with leading car makers and Tier 1 suppliers, argued the need for an internationally agreed 48V electrical standard. Such a standard will be necessary for the global automotive industry to achieve the economies of scale demanded by original equipment manufacturers.

CPT, together with other sponsors of the event, including AVL and Ricardo, is in the vanguard of 48V mild hybrid developments intended to address the ever-tightening European CO2 regulations and potentially a new and more aggressive test cycle—i.e., the Worldwide harmonized Light vehicles Test Procedures (WLTP).

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EALABC paper outlines approach to 48V hybrid systems with advanced lead-carbon batteries

November 19, 2014

The European Advanced Lead-Acid Battery Consortium (EALABC) is delivering a paper this week outlining the consortium’s approach to 48V hybridization at the 2nd International Conference on Advanced Automotive 48V Power Supply Systems in Düsseldorf. The EALABC focus is on the environmental and cost benefits of current and future advanced lead-carbon batteries for 48V hybrid vehicles.

The state-of-charge (SoC) of current lead-carbon batteries is typically maintained at between 30 and 50%, with the voltage and amperage meeting VDA requirements by not exceeding 54V at 150A when recovering joules of energy from vehicle deceleration (kinetic energy recovery) and exhaust gas energy recuperation (thermal energy recovery), also dropping not less than 38V at 180A when discharging energy for engine starting and torque assist. Advanced lead-carbon batteries for vehicles currently under development will be capable of operating in the 30 to 70% SoC range at 12.5kW.

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USABC reopens 4 RFPIs for development of advanced high-performance batteries for start/stop, 48V HEV, PHEV and EVs

October 10, 2014

The United States Advanced Battery Consortium LLC (USABC), a collaborative organization operated by Chrysler Group LLC, Ford Motor Company and General Motors, has reopened four requests for proposal information (RFPIs) for the development of advanced high-performance batteries for vehicle applications.

The RFPIs will remain active indefinitely to prompt more submissions from individual developers as well as collaborative R&D/supplier teams. Each requires a 50% minimum cost share. USABC seeks proposals the resulting technology from which will have the capability of meeting or approaching its technology targets for commercialization by 2020 for the following applications:

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Hyundai showcasing new downsized turbo engines and 7-speed dual-clutch transmission; i40 48V Hybrid, i30 CNG

October 02, 2014

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New engines and transmission. Click to enlarge.

Hyundai Motor is showcasing two new turbocharged gasoline direct injected (T-GDI) engines at the Paris Motor Show 2014. Both engines—1.0-liter and 1.4-liter units which are part of a new generation of engines from the Kappa family—meet growing demand for small capacity, turbocharged engines to reduce fuel consumption and CO2 emission without compromising performance.

In addition, Hyundai is premiering at the Paris show its first 7-speed dual-clutch transmission, fitted into the i30 CNG natural gas concept car, which contributes to improved fuel efficiency. Hyundai is also displaying the diesel i40 48V hybrid concept, featuring a lead-carbon battery.

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Ricardo to display functional integration prototype of ADEPT 48V “intelligent electrification” diesel

September 09, 2014

ADEPT schematic
ADEPT schematic. Click to enlarge.

Ricardo will display the first functional integration prototype of the Advanced Diesel Electric Powertrain (ADEPT) collaborative research project (earlier post) in public for the first time this week at the Low Carbon Vehicle Event (LCV 2014) in the UK.

The ADEPT project was launched in 2013 to demonstrate the potential for 48V-based intelligent electrification to deliver full hybrid-scale fuel efficiency from a highly cost-effective package. As the project approaches its mid-point, the research team—led by Ricardo and including Ford Motor Company, Controlled Power Technologies (CPT), the European Advanced Lead Acid Battery Consortium (EALABC), Faurecia and the University of Nottingham—has completed the build of the first functional integration prototype ADEPT vehicle.

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Audi moving ahead with 48V system in vehicles; mild hybrids

August 25, 2014

Audi will upgrade part of its vehicle electrical system from 12 to 48 volts. The move represents another technical building block for facilitating the integration of new automotive technologies while increasing the power and efficiency of its cars.

Audi recently showcased the scope of the 48-volt electrical system with the two technology demonstrators Audi A6 TDI concept and RS 5 TDI concept. (Earlier post.) Both models are fitted with an electrically powered compressor. This operates independently of the engine load and therefore fundamentally improves the acceleration performance. 48-volt technology is also suited for realizing convenience systems for dynamic chassis control. Audi will shortly be unveiling a variety of applications in this field.

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Two Audi TDI technology studies with electric biturbo, 48V electrical systems; both technologies to go into series production

July 17, 2014

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V6 TDI bi-turbo with electric compressor. Click to enlarge.

Audi has built two technology studies with the “electric biturbo” technology it is developing (earlier post): the Audi A6 TDI concept is equipped with a new 3.0 TDI monoturbo (i.e., a single turbo with supplementary electric compressor), while the Audi RS 5 TDI concept with a 3.0 TDI biturbo (two in-series turbochargers with supplementary electric compressor).

The electric biturbo system comprises a classic exhaust turbocharger (mono- or bi-turbo) working together with a supplemental, electric-powered compressor arranged in series and powered by a separate 48-volt electrical system. Instead of a turbine wheel, it contains a small electric motor that applies a maximum drive power of 7 kW to accelerate the compressor wheel to maximum speed within 250 milliseconds.

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