Plug-in hybrid cars, real consumption is three times the expected

This is not the first time that the issue of the consumption of plug-in hybrid cars, those that can be recharged at the power socket, has been addressed. Today, a study by the Fraunhofer Institute for System Research and Innovation in Karlsruhe sheds light on the topic once again.

In fact, according to the institute, the consumption and emissions data are battery hybrid cars On average three times higher Compared to what has been advertised for private cars, and five times higher for fleets. Disturbing results make us think. However, this is a problem that the European Union is trying to address and find valid remedies and solutions. Unfortunately, all this inconsistency in information is caused by the way homogeneity tests are conducted for plug-in hybrid cars, which in fact do not take into account the actual use of the vehicle.

The Fraunhofer Institute for Systems Research and Innovation (ISI) deals with the analysis and impacts of innovations. The team looks for short and long-term developments in innovation processes and the consequences that new technologies and services bring to society. On this basis, the institute is able to provide clients from industry, politics and science Recommendations for action and perspectives for key decisions Takes. The expertise is based on the scientific competence of the team and on a multidisciplinary and methodological research approach.

New research on the consumption of electric hybrid cars

Rechargeable hybrid models show the data for that They differ more of those consumed during the test cycle, compared to older car models. These cars represent about 9% of all new cars registered in Europe in the first quarter of 2022. They are equipped with an internal combustion engine and an electric motor, and their contribution to reducing emissions largely depends on the type of use in everyday driving.

For the joint study (the official website is here), the Fraunhofer Institute for Systems Research and Innovation ISI and the International Council on Clean Transport (ICCT) analyzed extensive data on About 9,000 plug-in hybrid cars across Europe. The analysis shows that the fuel consumption values ​​​​of plug-in hybrid vehicles are, on average, significantly higher than the results of official tests and have also increased recently.

How were the statistical analyzes performed? The researchers used anonymous data that vehicle drivers voluntarily reported to internet portals, such as Spritmonitor in Germany, and also took into account company vehicle data provided by fleet managers.

research results

Dr Patrick Plotz, Coordinator of the Energy Economy Business Unit at Fraunhofer ISI and lead author of the study, summarizes one of the study’s key findings as follows: “On average, real-world fuel consumption [al di fuori quindi dei test di omologazione] The CO2 emissions values ​​for plug-in hybrid vehicles for private drivers in Germany and other European countries are approximate. three times higher Compared to official testing procedures. For company cars, the deflection is also approx five times Official values.” A really impressive figure, an important gap between the official and real values ​​and it’s much higher for plug-in hybrid vehicles than for vehicles with conventional combustion engines.

The Real fuel consumption For plug-in hybrids driven by the private sector, it is about 4.0-4.4 liters per 100 km of travel. In the case of company cars, the average values ​​​​are between 7.6 and 8.4 liters. The average fuel consumption according to the official test procedure is 1.6-1.7 liters per 100 km, this makes us understand awesome difference Between data collected during the testing and approval phases and those recorded during typical use of plug-in samples in everyday life.

It must also be said that the real-world gap in plug-in hybrids has persisted to grow Over the years, the situation today is worse than it was in the past.

Previous analysis

There’s also an analysis from two years ago: the 2020 Fraunhofer-ICCT study can show us just how large the gap between consumption of hybrids under test and in real life is ever growing. “The new WLTP-certified plug-in hybrids tend to have a greater discrepancy than older NEDC-certified vehicle models,” says Dr. George Baker, one of the study’s co-authors. Every year this difference between the test and real fuel consumption and CO2 values Increases by 0.1-0.2 liters per 100 kmThis is according to what was proven in the latest study by researchers from data analysis.

On average, plug-in hybrid cars used by individuals are primarily powered by electricity for about 45% – 49% of the mileage, and for company cars, the share is from 11% to 15%. Fraunhofer ISI and ICCT researchers, thanks to their analyzes, are able to provide us with specific recommendations on the use of this type of vehicle: “Tax incentives, such as purchase bonuses and reduced taxes on company cars, should be available only to drivers who pretend Travel with electricity for about 80% of their tripsor to consume 2 liters of fuel per 100 km during real driving.

Meanwhile, the European Union is today assessing the real consumption reliability of rechargeable hybrid cars, focusing its attention on these issues that are evident through various studies conducted by experts in the energy sector and assessing whether to implement some New verification protocols starting in 2025.

The long-term CO2 emissions of plug-in hybrid vehicles do not allow us to achieve one of the EU’s biggest goals: the creation of a climate-neutral transport sector. As expected in the European Commission’s proposal for the future (on CO2 emissions standards), no additional hybrid cars should be registered after 2035. An important vote of environment ministers is scheduled for June 28. This system.

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