Developing a Multistep Tumble Flap for Air Intake Systems

Autoren

Jörg Rückauf, Jürgen Stehlig, Ivano Morgillo, Martin Janssen,
MAHLE Filtersysteme GmbH, Stuttgart;
Shunichi Inamijima, Masahito Shiraki, Kazuki Tanzawa, Isei Matsuzaki,
Nissan Motor Co. Ltd., Kanagawa, Japan;
Junichi Matsuzaki, Takashi Kawano,
MAHLE Filter Systems Japan Co. Ltd., Saitama, Japan

Zusammenfassung

High tumble ratio is required to achieve stabilized combustion conditions and high exhaust gas recirculation (EGR) tolerance in future internal combustion engines.

Tumble generation can be adjusted to all engine conditions with the help of variable flap systems. The flap position can be adjusted to the airflow or opened fully to prevent pressure loss, which enables the engine to operate with high tumble ratios and prevent the disadvantages of high-load conditions.

To this end, Nissan and MAHLE developed a new swing type multistep tumble control valve (MS-TCV) system for the air intake manifold. It provides optimal tumble airflow for various engine operation conditions with minimum airflow resistance and variable tumble—one valve system to improve both emission and fuel consumption.

Several opening ratios with intermediate positions can be set with the multistep TCV system, optimizing all engine conditions to further improve fuel consumption by up to 0.3% (JC08 mode).

Mitglieder-Login