Ford Global Technolgoies, LLC

Volvo Personvagnar Ab

Magnus Blomroos

Roger Tengblad

G&ouml;ran Wirmark

Jan-Erik Larsson

Robert Wassmur

S&ouml;ren Karlsson

Mats Laurell

Andreas Sundberg

Conny Johansson

Lennart Johansson

The present invention relates to a secondary air injection system for an internal combustion engine, and an automotive vehicle comprising such a secondary air injection system. The arrangement includes shut-off valve for selectively passing on or restricting airflow form the secondary air injection system. A flexible connector is arranged to receive the airflow and pass it on to at least two reed-type non-return valves arranged to substantially only allow airflow in the downstream direction. At the downstream side of each respective reed-type non-return valve a conduit for communicating any airflow passed there through to an associated exhaust bank of the internal combustion engine.

Secondary air injection system for an internal combustion engine

The invention relates to a device and a method for reducing emissions in catalytic converter exhaust systems for a vehicle provided with a combustion engine. The invention comprises a control unit adapted to control the air-fuel being fed to the engine so that a high concentration of hydrogen is generated in the exhaust gas during start-up of the engine. Furthermore, secondary air is supplied downstream of the engine during cold starting thereof for foaming a gas mixture with the exhaust gas. This gas mixture is oxidized, so that heat energy generated by means of this oxidation is supplied to the catalyst, thereby providing a reduction of the light-off time of the catalyst.

Device and method for reducing emissions in catalytic converter exhaust systems

Growing community of inventors

Västra Frölunda, Sweden

Magnus Blomroos