Husqvarna Ab

Johnson Matthey Public Limited Company

Mats Lavenius

Martyn Vincent Twigg

Andrew Peter Walker

Bo P Carlsson

Mikael Larsson

Claus Friedrich Goersmann

Anders Klas Andreasson

Björn Landén

Eive Tord Ronny Allansson

A fuel supply unit () is provided e.g. a carburetor or a low pressure injection system of an internal combustion engine. The fuel supply unit () includes a main air passage (), which has a throttle valve () mounted therein and the throttle valve () includes a throttle shaft () extending between two to one another opposite located shaft sides (). A control module () for the fuel supply () is mounted to one () of the shaft sides (), which control module () includes throttle position detecting means () for monitoring the position of the throttle valve (), and fuel valve means () for controlling the fuel supply to the main air passage (). Also, an ignition system is provided which is able to control the ignition timing with respect to status of the at least one of the means () in the control module () in order to at least control the idle speed of the engine. The ignition system further being arranged to power at least one of the means () of the control module ().

Fuel supply unit

An exhaust system for a vehicular lean-burn internal combustion engine includes a NOreduction catalyst, a source reductant, means () for contacting the catalyst with the reductant, means for sensing the temperature of the exhaust gas and/or the catalyst bed and means, when in use, for controlling reductant addition. The reductant addition control means supplies an amount of reductant to the catalyst at a rate corresponding to a measured temperature value of the exhaust gas and/or catalyst bed, which temperature value has been pre-determined to correlate, in use, with an amount of NOin the exhaust gas.

Methods of controlling reductant addition

Growing community of inventors

Partille, Sweden

Mats Lavenius