WO2009056532A1

WO2009056532A1 - Method for operating a device

Info

Publication number: WO2009056532A1
Application number: PCT/EP2008/064577
Authority: WO
Inventors: Magnus Labbe; Andreas Koring
Original assignee: Robert Bosch Gmbh
Priority date: 2007-11-02
Filing date: 2008-10-28
Publication date: 2009-05-07
Also published as: DE102007052360A1

Abstract

The invention relates to a method for operating a device (4), wherein, upon the occurrence of a fault (8) in the device (4), at least one measure (10) for operationally-linked remedying of the fault (8) is performed, at least one fault registration being provided if said fault (8) is still present after the at least one measure (10), and said at least one fault registration not occurring if the fault (8) is remedied after the at least one measure (10). Furthermore, the invention relates to a control unit (2) for controlling a device (4), a computer program, and a computer program product.

Description

description

title

METHOD FOR OPERATING A DEVICE

The invention relates to a method for operating a device, a control device for

Controlling a device, a computer program and a computer program product.

State of the art

In a so-called on-board diagnosis in a vehicle, which is typically carried out by a control unit, the properties of various actuators, sensors and other components are evaluated and their current actual operating parameters are compared against error thresholds. If a component is detected as faulty, an error is entered in the fault memory. Even after debouncing the error this is indicated by an indicator lamp (MIL).

The document DE 100 49 68 Al shows a method and a device for the own diagnosis of a NOX sensor. In this case, a time interval for forming a diagnostic signal in the event of an error is described, so that it is possible to avoid false error messages and to cure set error signals. In addition, it is disclosed here that a signal lamp is driven only when not healed error signals. Thus, a signaling of an error and / or a storage of the error does not initially, if this no longer occurs within a time interval.

A method and a device for diagnosing a diverter valve of a supercharger are described in the publication DE 101 11 271 A1. This is indicated by turning on a diagnostic lamp to the driver that there is an error in the engine control system. Furthermore, a storage of a corresponding entry in the error memory. This allows a quick elimination of the error condition. In detail, it can be provided here that in the event that a stored error value exceeds an upper limit value, a counter signal is stored in a further memory cell and if necessary an error lamp is activated. If, however, the meter reading falls below the predetermined lower limit threshold, the error entry is reset and the lamp is switched off. Accordingly, a cure of the error is assumed.

An ignition system for an internal combustion engine is known from the document DE 41 40 147 A1. This ignition system includes a monitoring switch, which serves to initiate emergency measures to protect a catalyst in case of faulty ignitions. For this purpose, the ignition system further comprises an evaluation device, which subjects the ignition diagnosis signal to a statistical weighting and initiates corresponding emergency measures when a predetermined threshold of the weighted ignition diagnosis value is exceeded, wherein the expansion is continued steadily, so that the subsequent undershooting of an error threshold a cure is recognized and the emergency measures are withdrawn.

Disclosure of the invention

In the case of the method according to the invention for operating a device, if a fault occurs in the device, at least one measure for the in-service elimination of the fault is provided

Made mistakes. If the error still exists after the at least one measure, it is provided that at least one error registration is provided. If the error is remedied after the at least one measure, it is provided that the at least one mentioned error registration is omitted.

With the inventive method, for example, an automatic, in-service repair of the error is possible. The elimination of the fault can be performed by the device itself or by supporting other devices, for example. By control units that interact with the device within a motor vehicle, in-service.

Various conditions can be attached to the implementation of the method. Thus, for example, it can be taken into account how serious the error is, and how great is the effort in the context of the at least one measure to remedy this error. Accordingly, can It is decided how often the at least one measure and / or the period of time during which this at least one action is taken. A condition on the basis of which it is decided on the basis of how often this at least one measure is carried out may depend on a current operating situation of the device and on operating situations of devices which interact with this device. Furthermore, values for operating parameters provided for the device or provided by the device can also be taken into account.

Typically, the described method may then begin as soon as an error or error symptom is registered within the device. In response to such an event, the at least one remedial action is then taken. Depending on whether the error still exists after performing the at least one measure, the registration action or error registration is provided or not provided.

It can be provided in a first variant that only after the occurrence of the error at least one error registration or error message is provided if the error after the at least one measure is still present.

In a further variant, for example, immediately after the occurrence of the error, the at least one error registration can be provided. However, this already provided error registration can be withdrawn after the error after the at least one measure. Such a withdrawal of an already provided error registration thus corresponds to the fact that after the implementation of the at least one measure to complete the procedure, the error registration in this case is actively omitted or omitted.

To remedy the error operating parameters of the device can be adapted in an embodiment. For carrying out the at least one measure, this may mean that a first operating parameter is set to a first value during a first execution of the measures and, in the case that a further measure for correcting the error is required, this operating parameter is set to a second measure second value is set. Alternatively and / or additionally, it can also be provided that in succession - A -

measures to be taken, different operating parameters are set in combination or in isolation to different values.

In addition, the occurrence of the error can be variously defined. So it is possible in a variant that at least one property of the device is compared with an error threshold, wherein the at least one measure to remedy the error is already initiated shortly before reaching the error threshold. For this purpose, an example. Percentage tolerance value can be set for the error threshold, so that in this case already reaching the error threshold plus / minus this tolerance value can be defined as a premature achievement of the error threshold.

Depending on the nature of the property to be investigated, the at least one measure can also be initiated when the error threshold is reached or when the error threshold is exceeded.

Thus, it is possible to specify different errors and / or a different occurrence or occurrence of an error for different properties of the device.

In order to provide the at least one error registration, in particular a driver or a user of the device can be provided with a sound that can be heard well. This may be an optical signal, acoustic signal and / or audiovisual signal, which is provided, for example, via a display device, typically a signal lamp.

If it should be possible in the context of the method to remedy the error that occurred after performing the at least one measure, such a signal is not required or such a signal is reset, if this signal already at

However, the error is displayed after the at least one measure has been remedied or cured. In this variant too, the error registration is omitted or the error registration is omitted, so that the error registration is not confirmed by further maintenance.

As a further possibility, provision is made for information about the error to be stored in a suitable error memory in order to provide the at least one error registration. Such storage of the information about the error is omitted if it possible to fix the error. A possibly already stored information about the error can be withdrawn by deleting the information, if the error is corrected, is omitted in this case, the error registration or will omit the error registration and therefore not maintained.

An application of the method is suitable for various facilities in the automotive sector and thus u.a. for motor vehicles. The method is, for example, also suitable for a device of an exhaust system.

The invention further relates to a control device for controlling a device which is designed to carry out at least one measure for the in-service elimination of the fault in the event of an error occurring in the device. In this case, the control unit is designed to provide at least one error registration if the error is still present after the at least one measure. Furthermore, the control device is designed to refrain from providing the at least one error registration if the error is remedied after the at least one measure.

This described control unit is designed and suitable for carrying out all the above-described steps of the method according to the invention. Regardless of whether the error registration or a registration action after the occurrence of the error now takes place or not, in the event that the error after the at least one measure, in particular to complete the process, corrected and thus is or is cured, the error registration omit, which means that the error registration will be omitted if it is withdrawn at the conclusion of the procedure.

With the control device for controlling the device, this device can be controlled and / or regulated and thus operated. In this case, the control unit is designed to detect the occurrence of the error and to take the appropriate measure of at least one operating parameter, the at least one measure to correct the error and thus initiate. Accordingly, this controller is u. a. by providing suitable

Operating parameters for the device designed to operate this device. A computer program according to the invention with program code means is designed to carry out all the steps of a described method when the computer program is executed on a computer or a corresponding arithmetic unit, in particular in a presented control unit.

In addition, a computer program with program code means is provided in the context of the invention, which are stored on a computer-readable medium to perform all the steps of a method according to the invention, when the computer program is executed on a computer or a corresponding computing unit, in particular in a control unit.

In an embodiment of the invention, it is provided that, in the case of a component or device suspected of being defective or suspected, the operating conditions or the control of the component and / or a registration module are changed in such a way that a reversible fault condition can be eliminated.

In some of the errors that occur with components, damage is usually reversible and can be remedied by certain measures during operation and thus cured.

Immediately before reaching the error threshold or after the first entry of the error in the error memory, the measures that can possibly cure this error are initiated in order to put the vehicle back into a fault-free state as far as possible. This fixed error will not be acknowledged and then deleted from memory.

In a refinement, the invention relates to a so-called on-board diagnosis for checking components or devices which are designed, for example, as actuators or sensors of a vehicle. If an error occurs in such a component, so far it has been provided to make an entry in an error memory and / or, for example, to provide a signal about the occurrence of the error via a control lamp. If it should be a particular reversible error, it is within the scope of the invention possible to remedy this also during operation of the vehicle by introducing certain measures. For example, before classifying a catalytic converter as a component of a vehicle as faulty, the catalyst can be heated to correct the error to reverse a potentially causative poisoning with sulfur.

In a first example, it is provided that a catalyst can deteriorate due to different influences in its conversion. A poisoning with sulfur is possible when operating with high sulfur fuel or continuous short-distance operation, since the sulfur is discharged from the catalyst only at high temperature. When the catalyst reaches the error threshold, by increasing the exhaust gas temperature, e.g. by Zündwinkelverstellung or double injection, degraded by a sulfur poisoning degradation degraded again. In addition to the temperature change, changes in the exhaust gas composition are also conceivable in the exhaust system.

If in design a lambda probe with a pumped reference has an inadmissibly high offset due to poisoning of the reference, the reference can be corrected again by increasing the pumping current.

Thus, a correction of the error by adjusting the operating parameters described is possible.

Temporary weakness actuators can sometimes be repaired by periodic or non-periodic controls. This concerns, for example, an open clamping tank vent valve (TEV), which can not be closed by small parts.

Further advantages and embodiments of the invention will become apparent from the description and the accompanying drawings.

It is understood that the features mentioned above and those yet to be explained below can be used not only in the particular combination indicated, but also in other combinations or in isolation, without departing from the scope of the present invention.

Short description of the drawing 1 shows a schematic representation of an embodiment of a device according to the invention when carrying out a variant of the method according to the invention.

Embodiment of the invention

The invention is illustrated schematically with reference to an embodiment in the drawing and will be described below in detail with reference to the drawings.

Figure 1 shows a schematic representation of an embodiment of an inventive

Control unit 2 and a device 4. It is envisaged that the control unit 2 interacts during operation with the device 4, so that between the control unit 2 and the device 4 operating parameters are exchanged. About such an interaction 6, it is also possible that the control unit 2 detects an occurrence of an error 8. In response to this error 8, at least one measure 10 for rectifying the error 8 is made by the control unit 2.

At the conclusion 12 of the method, it is checked whether the error 8 is still present after execution of the at least one measure 10 for the correction of the error 8. If the error 8 should still be present at the conclusion 12 of the method even after the at least one measure 10 has been carried out, an error registration takes place. If the error 8 should no longer be present for completion 12 of the method, such an error registration is omitted.

As an error registration or is typically a suitable signal for a user of the device 4 and / or storage in a fault memory, which may be formed, for example, as a component of the control unit 2, is provided.

There are two ways to provide error registration. As a first possibility, the error registration is provided after the occurrence of the error 8. However, if the error 8 is corrected, this error registration is reset, so that the error registration is not maintained and therefore omitted. If error 8 is not resolved, the error registration already made will also be completed 12 of the procedure. This means that, in particular, the maintenance of the error registration will be decided upon at the end of the procedure.

A second possibility is that the provision of the error registration will not be decided until 12 of the procedure has been completed. If the error 8 should still be present after completion of the at least one measure 10 for the completion 12 of the method, the error registration takes place; if the error has been remedied and thus cured, the error registration is omitted.

Regardless of whether the error registration takes place after the occurrence of the error 8 or not, it is checked at completion 12 of the method after performing the at least one measure 10 whether the error 8 is still present and decided whether the error registration is omitted or maintained.

Claims

claims

Method for operating a device (4), in which, when an error (8) occurs in the device (4), at least one measure (10) for in-service repair of the error (8) is made, whereby at least one error registration is provided; if the error (8) is still present after the at least one measure (10), and wherein the at least one error registration is omitted if the error (8) after the at least one measure (10) is corrected.

2. The method of claim 1, wherein after the occurrence of the error (8) only the at least one error registration is provided when the error after the at least one measure (10) is still present.

3. The method of claim 1, wherein after the occurrence of the error (8), the at least one

Error registry is provided, but after removal of the error (8) after the at least one measure (10) is withdrawn.

4. The method according to any one of the preceding claims, in which to correct the error (8) operating parameters of the device (4) are adjusted

5. The method according to any one of the preceding claims, wherein at least one property of the device (4) is compared with an error threshold, and in which the at least one measure (10) to remedy the error (8) is initiated shortly before reaching the error threshold.

A method according to any one of the preceding claims, wherein a signal is provided to provide the at least one error registration.

7. The method according to any one of the preceding claims, wherein for providing the at least one error registration information about the error (8) is stored.

8. The method according to any one of the preceding claims, for a device (4) of a

Exhaust system is performed.

9. Control device for controlling a device (4) which is adapted to perform at an occurrence of an error (8) in the device (4) at least one measure (10) for operational elimination of the error (8), and in this case at least one Provide error registration if the error (8) is still present after the at least one action (10) and omit provision of the at least one failure registration if the failure (8) is remedied after the at least one action (10).

10. Computer program with program code means to perform all steps of a method according to one of claims 1 to 8, when the computer program on a computer or a corresponding processing unit, in particular in a control device (2) according to claim 9, is executed.

11. Computer program product with program code means which are stored on a computer-readable data carrier to carry out all steps of a method according to one of claims 1 to 8, when the computer program is run on a computer or a corresponding computing unit, in particular in a control device (2) according to claim 9, is performed.