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Volkswagen 1.0 TSI engine fitted with a catalyzed GPF

6 June 2018

The newest version the Volkswagen 1.0 TSI engine offered in the up! GTI city car since the Spring 2018 comes equipped with a catalyzed gasoline particulate filter (GPF). The 85 kW (115 hp), 3 cylinder petrol engine—the latest addition to the VW EA211 engine range—is the first of its kind to be combined with a four-way catalytic converter, said the company. The “four-way” designation refers to the combination of the three-way catalyst (TWC) with the particle emission control functionality of the filter.

The new 1.0 TSI engine has won the International Engine of the Year 2018 British journalist award in the sub 1-liter engine category.

The 999 cm3, four-valve engine contains two adjustable camshafts, a turbocharger with electric wastegate actuator, an intake manifold with integrated intercooler and an exhaust manifold integrated into the cylinder head. With a pressure of 350 bar, the fuel mixture is injected directly into the combustion chambers. The engine delivers 115 hp at 5,000-5,500 rpm and 200 Nm of torque at 2,000-3,500 rpm.

The engine meets the Euro 6d-TEMP (EU 6AG) emission standards. This has been achieved through a combination of in-cylinder technology—such as a 5-hole piezoelectric injector, high injection pressure, newly developed turbocharger, and new pistons—with emission aftertreatment. A core element of the emission aftertreatment system is a new four-way catalytic converter with integrated gasoline particle filter, also referred to as Ottopartikelfilter or OPF. The GPF reduces particle emissions by 95% (presumably as particle numbers). A second three-way catalytic converter in the underbody ensures a sufficient overall TWC catalyst loading to meet the Euro 6d-TEMP gaseous emission limits, even under heavy loads.

The Euro 6d-TEMP emission standards include fuel consumption measurements according to the new Worldwide Harmonized Light Vehicles Test Procedure (WLTP) and Real Driving Emissions (RDE) test. The up! GTI with the 1.0 TSI engine has a WLTP combined fuel consumption of 5.7-5.6 L/100 km and CO2 emissions of 129-127 g/km. Over the NEDC, the combined fuel consumption is 4.8 L/100 km (urban: 6.0; extra-urban: 4.1) and CO2 emissions are 110 g/km.

Volkswagen announced in 2016 that it intends to use particle filters on all direct injection TSI and TFSI engines. By 2022, the number of Volkswagen Group vehicles equipped with GPF technology could reach seven million per year, said the company. The process started in June 2017 with the 1.4 L TSI engine in the Tiguan and the 2.0 TFSI in the Audi A5.

Gasoline particulate filters were first launched in 2014 on the Mercedes-Benz S500 model. The S500 GPF and other earlier GPF installations utilized a bare (uncatalyzed) filter positioned downstream of the three-way catalyst.

Source: Volkswagen