The paper presents main methods of monitoring catalytic converters in CI engines. Methods and sensors are characterized. This paper presents a modified test bed used for testing the exhaust pipe in light of determining the possibility of applying a measurement probe to determine NOx concentration. These investigations could help evaluate the possibility of catalytic converter monitoring within the framework of on-board diagnostic systems.CONDITIONS PREVAILING IN THE EXHAUST SYSTEM OF A CI ENGINE IN LIGHT OF THE APPLICATION OF NOX SENSORS TO DETERMINE THE EFFICIENCY OF A CATALYTIC CONVERTER
In the article, selected methods of monitoring a catalytic converter in compression-ignition engines are presented. These methods are characterized and the executive elements are described. A modified test stand is presented, on which exhaust system tests were conducted to determine the possibility of using measurement probes to determine NOx concentrations.
These studies were conducted to identify the possibilities of monitoring the catalytic converter within the framework of on-board diagnostic systems.
1. INTRODUCTION
The OBD system (On Board Diagnostic system; known in the United States as the OBD II system and in Europe as the EOBD one) is a set of diagnostic tests and calculation and decision-making procedures which are performed in real time and are intended as a measure for the evaluation of emission efficiency and the efficiency of elements responsible for the passive and active safety of a vehicle. The OBD system is an integral part of the vehicle connected with the engine control system. Nowadays, the investigation of on-board diagnostic systems in their different applications is one of the basic problems that the OBD method is concerned with. (…)
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Source: Logistyka Magazine