Method for monitoring an exhaust after treatment device
A technology of exhaust gas treatment device and exhaust pipeline, which is applied to electronic control of exhaust gas treatment device, diagnostic device of exhaust gas treatment device, exhaust gas treatment, etc., can solve the problem of poor temperature control, dynamic difference of estimated temperature, Problems such as error diagnosis reports
Active Publication Date: 2021-09-07
DELPHI INT OPERATIONS LUXEMBOURG S A R L
View PDF10 Cites 1 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
If the thermal inertia of the exhaust treatment device (high inertia components are catalytic converters and particulate filters) differs from the nominal value (production tolerances, parts removal, aftermarket parts...), the dynamics of the estimated temperature will be different and different from the actual value can cause large temperature errors compared to
Large temperature errors can lead to poor temperature control or false diagnostic reports
Method used
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View moreImage
Smart Image Click on the blue labels to locate them in the text.
Smart ImageViewing Examples
Examples
Experimental program
Comparison scheme
Effect test
Embodiment Construction
[0035] Figure 4 Illustrated is a conventional exhaust tract system 10 connected to an internal combustion engine 12, such as a multi-cylinder diesel engine, which produces an exhaust flow containing pollutants with soot and / or particulates. An engine control unit (ECU - not shown) is signally and operatively connected to a number of sensors and actuators for controlling and monitoring engine operation, as known in the art.
[0036] Figure 4 The figure in FIG. 2 illustrates a simple exhaust system 10 comprising an exhaust line 14 in which aftertreatment components 16 are arranged, including for example an oxidation catalyst. The aftertreatment device 16 is arranged such that the entire exhaust flow has to pass through it. This is only an example, and as known to those skilled in the art, the exhaust line may include one, two or more after Processing device.
[0037] It should also be noted that while in the above examples component 16 includes a single oxidation catalyst,...
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More PUM
Login to View More Abstract
The present invention relates to a method of monitoring an exhaust after treatment device, in particular to a method of operating an exhaust piping system comprising at least one exhaust treatment device. A control unit receives temperature signals from a pair of temperature sensors arranged upstream and downstream of an exhaust treatment device. The control unit runs a temperature model to estimate a temperature of the exhaust treatment device, taking into account the thermal inertia of the exhaust treatment device and receiving as input an inlet temperature determined by the upstream temperature sensor. The thermal model uses a nominal inertia corrected by a correction coefficient, the correction coefficient being determined by a learning procedure on the basis of a deviation between modelled and measured outlet temperatures during a transient engine operating phase, such as at cold start.
Description
technical field [0001] The present invention generally relates to the field of exhaust gas treatment in internal combustion engines. Background technique [0002] Modern internal combustion engines are characterized by various exhaust aftertreatment devices to reduce the toxicity of engine emissions. Components commonly used to handle exhaust include: [0003] Catalytic converters, which break down gaseous pollutants in the exhaust into less harmful components; [0004] • Particulate filters (or soot filters) for removing fine solid particles in exhaust gases, especially in diesel engines. [0005] Optimum operation of these components requires, among other things, that the exhaust gas temperature and / or the exhaust aftertreatment device be adjusted within predetermined ranges. For example, the catalytic activity of known catalytic converters for converting pollutants in exhaust gases is strongly temperature dependent. This means that a minimum temperature at the catalyt...
Claims
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More Application Information
Patent Timeline
Login to View More IPC IPC(8): F01N9/00F01N11/00
CPCF01N9/005F01N11/005F01N2900/0402F01N2900/0416F01N2900/1404F01N2560/06F01N2560/14F01N2900/1602F01N2900/08Y02T10/40
Inventor P·鲍维
Owner DELPHI INT OPERATIONS LUXEMBOURG S A R L