Tag Archives: Diesel engines

News

Stellantis suspends orders for diesel commercial vehicles

Stellantis will no longer accept orders for light commercial vehicles powered by diesel engines! This is official information from the company, and the reason is the new CO2 emission regulations that will come into force in 2025.

Although diesel engines are the most acceptable in the truck segment, manufacturers decide to remove them from the offer. Dacia gave up diesel engines forever with the second generation Duster, while Toyota took this step much earlier and replaced its diesels with hybrid engines, which are equally economical and with similar performance. However, the Volkswagen Group is still resisting pressure, and continues to sell cars powered by TDI engines, even as it prepares to phase them out in the coming years.

Vehicles such as the Peugeot Rifter, Citroen Berlingo and Opel Combo will be available only with petrol or electric engines. It should also be noted that this decision should also include cargo versions, although this remains questionable.

Source: Stellantis

News

This diesel engine has a thermal efficiency of more than 53 percent

In 1897, the first diesel engine was built with an effective efficiency of 26.2%. Since then, scientists have been trying to increase its efficiency, which until recently was between 30 and 50%. However, the Chinese company Weichai Power presented at the World Congress on Internal Combustion Engines the first ever diesel engine with an intrinsic thermal efficiency of more than 53 percent.

Engine thermal efficiency is the percentage of diesel combustion energy transferred into usable engine work without the need for a waste heat recovery mechanism. In 2020, the Chinese company presented its diesel engine with a thermal efficiency of 50.23 percent, and two years later the efficiency increased to 52.28 percent.

In 500 days of work, the research team achieved the optimization of four vital systems: fuel supply, air intake, combustion and friction reduction. This resulted in a higher thermal efficiency of the engine, but also a higher economy of the engine, which in this case is nearly 14%. The team has effectively advanced high expansion combustion, pressurized mixed flow, highly efficient fuel injection and low drag friction reduction technology.

How significant this achievement is is shown by the fact that it would lead to annual fuel savings of around 30 million tons and a reduction in carbon emissions by almost 100 million tons. If we consider individual vehicles, a heavy tractor with an annual mileage of 250,000 km can save about 12,000 gallons/45,425 liters of fuel thanks to this technology. That would mean an additional nearly $13,500 for the owner, based on current fuel prices.

It should be noted that during the research and development phase, the team received 176 patents for inventions and 68 patents for utility models.

Source: Reuters

News

Volkswagen will keep the diesel engines

At a time when the EU is tightening regulations on CO₂ emissions, Volkswagen has found a solution for its diesel engines. To preserve four-cylinder diesel engines, Volkswagen has received a license to use biofuels, which will reduce CO₂ emissions to 10-30 percent compared to current diesel engines.

“The use of environmentally friendly fuel is approved for Volkswagen models, thus enabling customers in Europe to significantly reduce carbon emissions as soon as fuel is available locally. The use of paraffin fuel is a reasonable additional option, especially for companies with a mixed fleet of electric vehicles. and conventional propulsion,” said Professor Thomas Garbe, Volkswagen’s head of petrol and diesel fuels.

Biofuel is produced from biological residues and waste materials such as hydrotreated vegetable oil. It has been available on the market for many years (C.A.R.E diesel, NEXTBTL and HVO) and its share is expected to increase by 30 percent by the end of the decade.

According to the European standard EN 15940, the license applies to all vehicles sold from the end of the first half of 2021.

Source: Volkswagen