Device for inserting a sensor into the exhaust conduits of an internal combustion engine and a fuel-control system using such a device

A device for supporting at least one sensor in at least one exhaust conduit of an internal combustion engine having a cylinder head and at least one exhaust port each, said sensor being adapted to measure at least one parameter of the exhaust gasses in said conduit and including output leads conveying electrical signals representative of said parameters, said device comprising:

• a flat element formed by at least one sheet of insulating and compressible material resistant to high temperatures;
• fixing means for fixing said flat element in a gas tight manner between two pieces of each said exhaust conduit;
• a first aperture having walls defined by said flat element, said first aperture being coaxial with, and having the same dimensions as, said exhaust conduit, whereby said flat element forms a gasket in said exhaust conduit;
• at least one first cavity having walls defined by said flat element and extending to said first aperture, whereby each said first cavity communicates with said exhaust conduit but is out of the flow path of gasses in said exhaust conduit, each said first cavity being adapted to support said sensor;
• and
• means associated with said flat element for rigidly supporting said leads of each said sensor, whereby each said sensor is rigidly held in one said first cavity.