Device for ascertaining the composition of combustion gases in internal combustion engine

Abstract

Abstract The device (1) which can be used for detecting the richness of the combustion gases of an internal-combustion engine comprises a first optical system (2) equipped with a radiation source (4), a second optical system (24) equipped with a radiation sensor (27), and a chamber (18) which is arranged in a pipe (23) and is located on an optical path between the two optical systems (2, 24) and through which exhaust gases from the engine can pass. The sensor (27) then measures the absorption of the radiation from the source (4) by a chemical compound contained in the gases. The optical systems (2, 24) are equipped with a substantially cylindrical radiation guide (13, 20), one face (15, 21) of which is in contact with the high-temperature exhaust gases, thus making it possible to clean this face (15, 21) by pyrolysis. The invention is used in the motor-vehicle industry. <IMAGE>

Inventors

• 👤 Louis Société Civile S.P.I.D. Scoarnec
• 👤 Jacques Société Civile S.P.I.D. Villain

Bibliographic Details