G - Physics – 01 – N
Patent
G - Physics
01
N
G01N 27/26 (2006.01) F02D 41/14 (2006.01) F02B 1/04 (2006.01) F02B 75/02 (2006.01)
Patent
CA 2058452
Abstract The method for controlling the fuel-air mixture in an Otto engine having at least one cylinder, especially in an automobile engine, serves for the optimum use of a catalyser (18) with a probe in the hot exhaust gas stream (20) with carbon monoxide, nitrogen oxides and hydrocarbons. The measuring signals of the probe are converted through electronic means into control signals for the mixture preparation and ignition. The oxygen content of the exhaust gas stream (20) is measured in the combustion chamber of the cylinders, after the outlet valve in the cylinder heads or in the single pipes (12), in the protective region of a smooth, aerodynamic deflection device (40) it is measured without a reference atmosphere with a resistive ceramic oxygen probe (24) having a heat resistance up to approximately 1300°C and an adjustment time within the millisecond range. The oxygen probe (24) has a specific electrical conductivity dependent upon the oxygen partial pressure. The sensor layer (32), in the form of a thin diffusion layer, consists of a semi conducting titanate arranged on a small ceramic support (30). Fig. 3.
Klaus Leistritz Engineering Ag
Swabey Ogilvy Renault
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