How Volkswagen plans to clean up after Dieselgate

In the wake of Dieselgate, Volkswagen is planning what he calls a “broad band” of new propulsion technologies to meet the future demands CO2-led by Europe, North America and China.

The company says the achievement of the climate goals is become a “principal objective” and the massive, resources are allocated in a money-no-object assault on the emissions. The developments include a wide range of hybrid, electric and advanced combustion engine technologies. it 95g/km CO2 fleet average set for 2020 is likely to fall well below that by the year 2030. To meet this challenge, the electrification of powertrains will be essential for all the manufacturers.

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Volkswagen expects 25% of the cars will be battery electric by 2025, more than 50% will be electrified in some way, compared with just 3% today. Research is also continuing in bio and synthetic fuels and synthetic natural gas.

Fast plug-in hybrid vehicles and electric cars:

VW already has the electric e-Golf and e-Up, as well as the Golf and the Passat GTE plug-in hybrid, and it is the development of the beach. Current hybrids are equipped with a seven-speed DSG gearbox with built-in 60bhp electric motor/ generator. The engineers are also working on a ” GTI ” prototype, called the Golf GTE in the Performance, where the modifications made to the software boost acceleration in electric-only mode up to a speed unlimited if the battery is sufficiently charged. An all-new seven-speed DSG transmission, waiting to enter the production, can also support full-hybrid.

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Improvement of the technology cleans up diesel:

The recall on the VW diesel cars following Dieselgate is 70% in the whole of Europe, with fixes on the 2.0-litre, 1.6-litre and 1.2-litre engines are carried out at the rate of one car every 1.4 sec on a global scale. VW says independent testing confirms the recalled cars to meet the legislative requirements by using the new Real Driving Emissions measurement, even if it is facing repeated calls that the patch is harmful, and to make cars more polluting in some cases.

The options for the future of reducing NOx include the introduction of a second selective catalytic reduction module in the exhaust system with a NOx storage catalyst. The amount of NOx produced inside the engine will also be reduced, by using a higher pressure injection systems and combustion strategies. Electrically powered compressors operating on the new 48-VOLT electrical systems may also reduce emissions of NOx peaks,” reducing the work that remains to be done by the catalysts.

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The essence of the technology gets a boost:

The new 128bhp 1.5-litre TSI evo gas engine is a redesign of the existing engine using advanced and expensive technology to improve fuel economy and emissions.

The engine is the first volume of the production of a gasoline engine to be equipped with a variable geometry turbine of the turbocharger, has the highest compression ratio of a petrol engine turbocharged to 12:1 and runs on a special Miller the cycle of operation of the plan. The combination of the three, adds to the claimed best-in-class fuel consumption and flexible power delivery throughout the rev range.

The engine is about to go on sale in the UK in the Golf, but more powerful, 158bhp version exists in prototype form (and can be added to the Mk8 Golf, described as a Coach made below). The future of the gasoline technologies considered are water injection and a variable compression ratio.

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CNG and e-fuels:

The compressed natural gas (CNG) has been popular in Europe for decades and is now joined by renewable, bio-methane produced from the fermentation of plant materials such as straw. Bio-fuels are carbon neutral because the plants absorb CO2 during growth. Some 1800kg of straw on seven circular balls – can make 300 kg of CNG, enough to power a Polo shirt to 6200 km. The VW Group has been working on the production of synthetic e-fuels for a few years. The process combines CO2 from the atmosphere or fermentation processes with sustainably produced hydrogen to make carbon-neutral synthetic liquid e-fuel. It is worth the effort, as engineers, due to the switching of carbon-neutral synthetic or bio-fuels can have an immediate effect in the old as well as new engines.

Two types of mild hybrid:

Mild-hybrid electric vehicles (MHEVs) should become the norm in the coming years as a 48V electrical systems become commonplace. The combination of a 48V belt integrated starter-generator (BISG) and a small, affordable 48V lithium ion battery means that they can recover and store electrical energy as the other hybrids. The BISG can also increase the torque of the engine, the fuel savings and the improvement of the response.

VW has two prototypes, and a Golf course 1.5 STI MHEV and a MHEV More. The two have 15bhp BISGs but has a second, 34bhp electric motor driving the front axle, but it can also be mounted on the rear axle to create a low-power all-wheel-drive system to aid traction. The Most has the advantage that it can recover energy while coasting with the engine off and can also shoot from distance under electric-only power as a full hybrid.

The two prototypes are equipped with a new generation of seven-speed DSG transmission, which cuts CO2 emissions by 10g/km compared to VW first DSG was launched in 2003.

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