Operating method for an exhaust gas cleaning device and corresponding drive system

Abstract

The invention relates to an operating method for an exhaust gas cleaning device and a corresponding drive system. The device comprises an exhaust gas catalytic converter (4). The method comprises the following steps: determining a catalyst characteristic parameter of the exhaust gas catalytic converter (4), wherein the catalyst characteristic parameter representing the cleaning effect of the exhaust gas catalytic converter (4); taking a measure for improving the cleaning effect of the exhaust gas catalytic converter (4) when the catalytic converter parameter indicates an insufficient cleaning effect of the exhaust gas catalytic converter (4); and determining an operating point of an internal combustion engine (1) in a motor field. The invention provides for the motor measure to be initiated to improve the cleaning effect of the exhaust gas catalytic converter (4) as a function of the operating point of the internal combustion engine (1). Furthermore, the invention comprises a corresponding drive system.

Description

technical field [0001] The invention relates to an operating method for an exhaust gas purification system having an exhaust gas catalytic converter, for example a three-way catalytic converter, for purifying exhaust gas on a combustion engine, in particular in a motor vehicle. Furthermore, the invention relates to a drive system, in particular for a motor vehicle with a combustion engine and an exhaust gas catalytic converter. Background technique [0002] Exhaust gas purification systems are known from the prior art for the purification of exhaust gases on combustion engines, which use three-way catalytic converters. However, such three-way catalytic converters are subject to aging caused by natural and environmental influences, as a result of which the so-called light-off temperature increases, from which the exhaust gas catalytic converter is effective and provides a sufficient cleaning effect. In combustion engines with relatively low exhaust gas temperatures, there is...

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Problems solved by technology

[0003] A disadvantage of such known methods is the fact that engine-side measures for improving the cleaning action of the exhaust gas catalytic converter (for example ignition angle retardation adjustment) lead to more fuel consumption and a correspondingly increased CO 2 emission

That is to say, for such known methods there is optimization of the cleaning effect of the exhaust gas catalytic converter on the one hand and the fuel consumption and CO on the other hand. 2 Contradictions between the objectives of the minimization of emissions

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