DE102015212772A1 - Method for the treatment of multiple errors within an automatic transmission of a motor vehicle - Google Patents

Abstract

In the context of the method for the treatment of multiple faults within an automatic transmission of a motor vehicle components of the transmission are assigned to independent error categories, which is determined depending on the nature of the first occurring in an error category error, which emergency is possible when a second error occurs.

Description

The invention relates to a method for the treatment of multiple faults within an automatic transmission of a motor vehicle according to the preamble of patent claim 1.

From the EP 0431538 B1 It is known to perform a malfunction of a switching element of an automatic transmission of a motor vehicle, an emergency program and to switch the transmission in a predetermined emergency gear.

Furthermore, from the EP 0380214 A2 it is known to perform an emergency program with switchable gears in case of malfunction of the electronic transmission control of an automatic transmission of a motor vehicle, as long as the shift actuator of the transmission is still functional.

The present invention has for its object to provide a method for the treatment of multiple errors within an automatic transmission of a motor vehicle, through the implementation of a maximum possible availability while maintaining the driving stability of the vehicle is maintained.

This object is solved by the features of patent claim 1. Further embodiments and advantages will become apparent from the dependent claims.

Accordingly, a method for the treatment of multiple faults within an automatic transmission of a motor vehicle is proposed, within which components of the transmission are assigned to independent error categories, wherein it is determined depending on the nature of the first error occurring in an error category, which emergency when a second fault occurs is.

Within the scope of an advantageous development of the invention, the individual error categories and the corresponding emergency responses are stored in sequentially successive errors in a 2D matrix.

If no direct prioritization of emergency assigned to the errors is possible, it is determined by means of a comparator, whether an emergency gear is possible.

The invention is explained in more detail below by way of example with reference to the attached FIGURE, which represents a 2D matrix according to the invention.

Referring to the attached figure, components of the transmission are assigned to the independent error categories translation control, actuators, sensors and BUS communication, it being determined depending on the nature of the first occurring in an error category error, which emergency when a second error occurs in the same or in another error category is possible, whereby the individual error categories and the corresponding emergency responses are filed in sequential successive errors in a 2D matrix.

For example, if the first error is an error of the actuator category, and the second error is an error of the sensor category, the emergency has priority due to the error of the actuator category.

If the first and second errors can be attributed to the error category translation monitoring, prioritizing an emergency is unnecessary if the translation monitoring has a multilevel monitoring concept.

If the first error is an error of the sensor failure category, the translation monitoring function is deactivated, so that the second error can not be assigned to the error category translation monitoring.

If no direct prioritization of the emergency categories associated with the error categories is possible, it is determined according to the invention by means of a comparator whether an emergency operation is possible. In this case, it is first checked whether the current emergency mode corresponding to the first error is compatible with the second error, whereby, if this is the case, the currently engaged emergency mode is maintained; if this is not the case, no emergency is possible.

QUOTES INCLUDE IN THE DESCRIPTION

This list of the documents listed by the applicant has been generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.

Cited patent literature

• EP 0431538 B1 [0002]
• EP 0380214 A2 [0003]

Claims (4)

Method for the treatment of multiple errors within a transmission system of a motor vehicle, characterized in that components of the transmission are assigned to independent error categories, which is determined depending on the nature of the first error occurring in an error category, which emergency is possible when a second error occurs. Method for the treatment of multiple errors within a transmission system of a motor vehicle according to claim 1, characterized in that the individual error categories and the corresponding emergency operations are stored in a 2D matrix. Method for the treatment of multiple faults within a transmission system of a motor vehicle according to claim 1 or 2, characterized in that, if no direct prioritization of the emergency categories assigned to the fault categories is possible, it is determined by means of a comparator whether an emergency operation is possible, whereby it is first checked whether the current emergency response corresponding to the first fault is compatible with the second fault and, if so, the current emergency is maintained, and if the current emergency response corresponding to the first fault is incompatible with the second fault, no emergency transmission is possible is. Method for the treatment of multiple errors within a transmission system of a motor vehicle according to one of the preceding claims, characterized in that components of the transmission are assigned to the independent error categories translation monitoring, actuators, sensors and BUS communication.

Images