Microprocessor controlled three-way catalyst efficiency monitoring system

被引：2

作者：

Botsaris, PN

Sparis, PD

机构：

[1] Democritus University of Thrace, Electrical Engineering Department, Mechanical Engineering Laboratory, Xanthi

来源：

MICROPROCESSORS AND MICROSYSTEMS | 1997年 / 20卷 / 10期

关键词：

on board diagnosis; catalytic converter efficiency monitoring; temperature monitoring; emissions;

D O I：

10.1016/S0141-9331(96)01121-0

中图分类号：

TP3 [计算技术、计算机技术];

学科分类号：

0812 ;

摘要：

The present paper describes a new design for a microcontrolled three way catalyst efficiency monitoring system. The system is based on the Motorola 68HC 1 1e2 microprocessor and utilizes the differential signal from a pair of thermocouples installed at the catalyst outlet and inlet sections. This signal is processed in real time using an appropriate statistical algorithm and the corresponding results are compared to experimentally determined limiting values to assess the current state of the catalyst efficiency during driving conditions. The result of this comparison is presented on an LCD display as an A, B, C, or FAIL catalyst condition signal. The system can be readily installed and can operate on new and used cars provided that the type of catalyst used has been experimentally tested to provide the necessary limiting values that characterize its relative levels of efficiency. It can also be reprogrammed and calibrated via a RS232C serial interface. (C) 1997 Elsevier Science B.V.

引用

页码：585 / 593

页数：9