Tenneco develops Gasoline Particulate Filter technology

Company to launch new gasoline particulate filter (GPF) technology ahead of Euro 6c emissions regulation

Tenneco has announced that it is leveraging its expertise in diesel particular filter technology to develop gasoline particulate filters for 2017 model year light vehicles. These filters are designed for gasoline direct injection (GDI) engines to reduce particulate emissions in compliance with the Euro 6c emissions regulation, which takes effect on September 1, 2017.

GDI engines help improve fuel economy and therefore reduce CO2 emissions; however, they can have higher particulate emissions due to shorter fuel/air mixing times in the cylinder compared to multiport fuel injection engines. Advanced fuel injection strategies are currently used to control gasoline particulate emissions in-cylinder but they are designed for a particular emission test cycle and may be less effective under real driving conditions. Gasoline particulate filters effectively control particulate emissions under all operating conditions.

“At Tenneco we understand the functional requirements for gasoline particulate filters based on our experience as one of the first global suppliers to offer diesel particulate filter technologies in serial production,” said Josep Fornos, Executive Vice President, Clean Air, Tenneco. “With our design, engineering, systems integration and advanced manufacturing capabilities, we provide customers flexible solutions for any powertrain to meet future emissions regulations without compromising vehicle performance or durability.”

Diesel particulate filters for original equipment applications remove particulate matter from engine exhaust gases in a closed system. When gases carrying particulate matter flow through the filter’s substrate walls, particulate matter is trapped and collected in the filter. A regeneration process, triggered by the engine management system, then burns off the soot using either a fuel borne additive or a catalytic filter coating.

Gasoline particulate filters use the same type of wall-flow substrates as diesel particulate filters and can be included in the exhaust system in addition to the series three-way catalyst or the catalyst coating can be directly applied to the filter substrate to form a four-way catalyst. Improvements in the acoustic function of the gasoline particulate filter make it possible to reduce muffler volume, helping to reduce backpressure, increase performance, reduce weight and save cost.

Tenneco produces more than 2 million DPFs annually at its clean air manufacturing facilities in Edenkoben, Zwickau and Saarlouis, Germany; Rybnik, Poland; Hodkovice, the Czech Republic; Tredegar, the U.K. and Port Elizabeth, South Africa. The company’s special simulation and test procedures accelerate the development process, while optimized design and efficient manufacturing technologies help guarantee the quality of the company’s filter systems.

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