Volkswagen ID production to start in November
Improved tech cleans up diesel:
The recall on VW diesel cars following Dieselgate is 70% complete in Europe as a whole, with fixes on 2.0-litre, 1.6-litre and 1.2-litre engines being carried out at the rate of one car every 1.4sec globally. VW says independent testing confirms the recalled cars meet the legislative requirements using the new Real Driving Emissions measurements, although it is facing repeated calls that the fix is damaging and making cars more polluting in certain cases.
Future options for significantly reducing NOx include the introduction of a second selective catalyst reduction module into the exhaust system along with a NOx storage catalyst. The amount of NOx generated inside the engines will be reduced too, using new higher-pressure injection systems and combustion strategies. Electrically powered compressors operating on the new 48V electrical systems can also reduce NOx ‘peaks’, lessening the work left to do by the catalysts.
Volkswagen UK boss: 'no systematic issue' with dieselgate fix
￼￼Petrol technology gets a boost:
The new 128bhp 1.5-litre TSI evo petrol engine is a rework of the existing engine employing advanced and expensive technology to improve fuel economy and emissions.
The engine is the first volume-production petrol engine to be equipped with a variable turbine geometry turbocharger, has the highest compression ratio of a turbocharged petrol engine at 12:1 and runs on a special Miller cycle operating regime. The combination of the three adds up to 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 a more powerful, 158bhp version exists in prototype form (and could be added to the Mk8 Golf, pictured as an Autocar rendering below). Future petrol technologies being considered include water injection and variable compression ratios.
2019 Volkswagen Golf first official picture revealed
CNG and e-fuels:
Compressed natural gas (CNG) has been popular in Europe for decades and is now joined by renewable bio-methane made from fermenting plant materials such as straw. Bio-fuels are carbon neutral because the plants absorb CO2 when growing. Some 1800kg of straw - about seven circular bales - can make 300kg of CNG, enough to power a Polo for 6200 miles. The VW Group has been working on the production of synthetic e-fuels for some years. The process combines CO2 from the atmosphere or from fermentation processes with sustainably produced hydrogen to make a carbon-neutral synthetic liquid e-fuel. It’s worth the effort, say engineers, because switching to carbon-neutral synthetic or bio-fuels can have an immediate effect when used in older as well as new engines.