Thermal measuring and testing – Temperature measurement – Combined with diverse art device
Patent
1995-06-07
1997-07-15
Gutierrez, Diego F. F.
Thermal measuring and testing
Temperature measurement
Combined with diverse art device
123198D, 364557, 364581, G01K 1302
Patent
active
056476680
ABSTRACT:
A method and device for forming a signal relating to a temperature in the exhaust system of an internal combustion engine. The method can be used, for example, to form a signal for the exhaust gas temperature upstream of the catalytic converter, a signal for the temperature in the catalytic converter, or a signal for the temperature downstream of the catalytic converter. The first step is to form a signal for a steady-state exhaust gas temperature as a function of at least one operating characteristic of the internal combustion engine. This signal can be subjected to a series of corrections in order to take into account parameters such as the efficiency of the internal combustion engine, the air/fuel ratio, the temperature of the intake air, the mixture flow rate, the vehicle speed, a possibly activated cylinder cutout, and the presence of condensed water in the exhaust system.
REFERENCES:
patent: 3990308 (1976-11-01), McCormick et al.
patent: 4178798 (1979-12-01), Wessel
patent: 4442424 (1984-04-01), Shirasaki et al.
patent: 5255511 (1993-10-01), Maus et al.
Schnaibel Eberhard
Schneider Erich
Zhang Hong
Gutierrez Diego F. F.
Robert & Bosch GmbH
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