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Goodbye optional, the harsh law of emissions

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ENGINES – Do you want a car with a sunroof to enjoy the view or one equipped with roof bars to comfortably load your luggage? Attention, these options could soon disappear from the model ranges offered by the houses. It is the fault of the new European WLTP homologation tests, which impose on vehicles much more stringent parameters for consumption and emissions than the previous NEDC system and, above all, assign a single WLTP value to the entire vehicle, including the options, which were not previously involved in the calculation of the final value.

This means that any modification made to a standard model can increase the vehicle’s WLTP and this has led manufacturers to eliminate some options that modify the aerodynamics, weight or rolling resistance of the car, significantly affecting efficiency. and CO2. This is the case for example – underlines a study by Jato Dynamics – of the panoramic ceiling, of the bars on the roof but also of the oversized tires which, by producing more friction and resistance, can increase CO2 levels. To avoid this inconvenience, some manufacturers have even decided to reduce the average tire size of their cars in the range. However, going into detail, Jato Dynamics’ analysis points out that a sunroof can add around 2g / km of CO2 to a vehicle’s emissions levels, as can the fitting of larger routes. But if you add both the sunroof and the increased routes to the car, the CO2 emitted will not necessarily increase by 4 g / km. Much will also depend on the different combinations of options. This means that the advent of WLTP will also revolutionize the production and assembly processes of cars.

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Several changes to the model range and options have already been planned between 2017 and 2020, the period of the transition from the NEDC to the WLTP homologation system. And it is during these years that – specifies Jato Dynamics – the houses have had to push with even more force on the electric, in order to lower the average emissions and remain within the new European parameters. In Holland for example – the study specifies – the zero-emission models on the market have gone from 18 to 50; in France from 13 to 29; in Ireland, in 2020 alone, from 7 to 24.

“While once the options of a vehicle were the main source of income for homes, now with the advent of the new WLTP homologation standards – specifies the CEO of Jato Dynamics David Krajicek – manufacturers must considerably limit their offer in order in the EU fines on emissions. To offset the impact on the accounts, therefore, the houses will probably continue to push on electric vehicles. At the moment – continues the CEO of Jato Dynamics – we are not able to say with certainty what future models will be in range, but one thing is certain: it will be essential for manufacturers to know every single WLTP value, to meet their budgets and determine the guidelines of their company policies. ” So goodbye forever to options? Maybe not. But for homes the best way to be able to return to earn on customizations and aftermarket, even of combustion models, could be precisely to lower your average CO2 emissions spi ngendo on the electric.

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