DE19924122A1 - Controlling vehicle operating functions involves taking into account other than switched on and switched off states in deciding whether to switch the functions on and off - Google Patents

Abstract

The method involves evaluating input parameters and switching the operating functions on and off when certain combinations of input parameter values occur. In order to decide whether to switch the functions on and off other types of state are taken into account than the switched on and switched off states.

Description

The invention relates to a method for controlling Operating functions of a vehicle according to the Oberbe handle of claim 1.

A generic method is from US 5,278,547 known.

The known method enables the user to Control device for controlling operating functions the vehicle's determination of certain controls functions as desired. Here certain A output signals for the control device, which are used for executing tion of the local procedure, by entering a Control information in the control device optionally certain output signals are linked, whereby flexible control of the operating functions light becomes. The optional link is not here determined by the manufacturer of the control device, but can be used by the user of the control device, d. H. by the vehicle manufacturer or the driver be taken.  

The known method does not take into account how the vehicle's operating functions if certain input variables fail or the on gears determining sensors are to be controlled. So it can be used, for example, for a control function which ver as the input signal the vehicle speed is used, depending on the type of operation to be controlled function of great importance, what state (On or off) the operating function then on takes.

If, for example, normally when exceeded a set speed value automatically the damping effect of the shock absorbers in the direction "Harder tuning" should be changed, so it can especially in vehicles with a relatively high Top speed may be desirable in the event of failure or disturbance of the speed signal from Safe for reasons of safety, generally the "harder vote" to act four. On the other hand, if, for example, at About another speed value automa table a central locking provided in the vehicle should be operated to lock the vehicle would apply if the speed failed signals generally not useful, the central sales Actuation permanently to lock the doors gene.

From this it can be seen that one on the respective Be coordinated response to faults and Defects would make sense.

The invention is therefore based on the object Method for controlling operational functions of a Specify vehicle in which a tax determination functions by the user of the method in simple Way considering incorrect or unpleasant sibler input variables can be made.

This object is achieved by the in claim 1 specified invention solved. Training and before partial embodiments of the invention are in the Un claims specified.

One advantage of the invention is that it is very simple Applicability of the method according to the invention the user, who is dealing with complicated individual cases considerations of the failure options and - criteria of the input variables largely released is. The user only has to specify what kind of values of the input signals as incorrect or is implausible to look at and then only has to the desired reactions when controlling the loading drive functions of the vehicle in the event of incorrect Define input or implausible input variables.

With further advantages mentioned, the invention is described in following using an exemplary embodiment under Ver using drawings explained in more detail.

Show it

Fig. 1 shows the basic structure of a device for performing the method according to the invention and

Fig. 2 is a truth table for a logical conjunction, a logical disjunction as well as a logical negation according to the inventive method.

In FIG. 1, an apparatus is illustrated for performing the method according to the invention, comprising a microcomputer (1) and a memory (2). The microcomputer ( 1 ) can read data from the memory ( 2 ) and write data there. The memory ( 2 ) is preferably of the non-volatile type, for. B. an EEPROM. The memory ( 2 ) can also be arranged in the microcomputer ( 1 ) or represent a memory area of a memory in the microcomputer ( 1 ).

The microcomputer ( 1 ) is connected to signal transmitters ( 3 , 4 , 5 ) which supply the microcomputer ( 1 ) with input signals (a, b, c). A temperature sensor ( 3 ), a speed sensor ( 4 ) and a control element ( 5 ) of the vehicle which can be actuated by the driver, e.g. B. called a temperature controller for the heating system of the vehicle.

The microcomputer (1) is the output side to operation elements of the vehicle connected to switch the imple tion operational functions of the vehicle from the Mi krocomputer (1) and are switched off. An indicator lamp ( 6 ), an acoustic signal transmitter ( 7 ) and an electromagnetic relay device ( 8 ) are mentioned here only as examples. The indicator lamp ( 6 ) can be switched on via a signal (U), for example in the event of a fault or if the driving speed is too high. The acoustic signal generator ( 7 ) can also be switched on via a signal (V) in the event of a fault in the vehicle, for example. The heating system can be controlled, for example, by means of the relay device ( 8 ), which can be actuated via a signal (W).

In addition, the microcomputer ( 1 ) is connected to a data bus system ( 9 ), which is preferably designed as a CAN data bus system, for exchanging data with other control and regulating devices in the vehicle. The microcomputer ( 1 ) can receive a further input signal (d) from the data bus system ( 9 ) and, if necessary, transmit a further output signal (D).

A diagnostic device ( 10 ) can also be connected to the data bus system ( 9 ). By means of the Diagnosegerä tes ( 10 ) by an operator, for. B. the driver, information is transmitted to the microcomputer ( 1 ), which then stores it in the memory ( 2 ). As a result, information that can be determined by the operator of the diagnostic device ( 10 ) can be stored in the memory ( 2 ).

After the vehicle has been put into operation, the microcomputer ( 1 ) begins to continuously evaluate the input signals (a, b, c). Using information already stored in the memory ( 2 ), the microcomputer ( 1 ) then checks each of the input signals (a, b, c, d) for correctness and plausibility, the corresponding information about incorrect or incorrect information being stored in the memory ( 2 ) implausible signals are stored. Furthermore, the microcomputer ( 1 ) checks whether each of the input signals (a, b, c, d) is within a range limited by a lower threshold and an upper threshold, which is indicated by corresponding information in the memory ( 2 ) for each of the Input signals is set lies. If the microcomputer ( 2 ) determines that an input signal has values that lie within this range or that are incorrect or implausible, then it assigns the intermediate state (Z) to an input signal memory provided for the respective input signal. If the lower threshold is undershot, the input signal memory is assigned the "switched off" state (A), otherwise the "switched on" state (E). The microcomputer ( 1 ) carries out this procedure continuously for each of the input signals (a, b, c, d).

Using further information stored in the memory ( 2 ), the microcomputer ( 1 ) then makes logical connections between the values contained in the input signal memories. Logical conjunctions, logical disjunctions and logical negations, as will be explained in more detail below, are used as links. Within the framework of these logical links, variables which are already linked to one another can in turn be linked to one another in any manner in a multi-stage process.

As soon as all the links provided in the memory ( 2 ) have been carried out by the microcomputer ( 1 ), the results of the links are available in output signal memories. The data contained in the output signal memories are then output as output signals (U, V, W, D) to the operating elements ( 6 , 7 , 8 ) or on the data bus system ( 9 ). In this case, the state "switched off" (A) leads to the switching off of an operating element and the state "switched on" (E) leads to switching on the operating element. The intermediate state (Z) causes the last state of an output signal to remain unchanged, ie there is no change with regard to the switching on or off of the operating element.

In a particularly advantageous manner, the previously described, inventive methods any Linked input signals from any signal source and the results of linking to any Recipients are issued. The recipients can from digital or, when using digital / analog Converters, be of analog design. You can even do this internal intermediate results that are in the control unit Execution of the method are used.

By using a third state, the intermediate state (Z), the user can advantageously define a switching function for the failure of certain input signals by suitable programming of the memory ( 2 ), which has a particularly high operational reliability or the highest possible availability the operating function allowed. The user has access to the entire range in the area of the "maximum security" and "maximum availability" limit criteria.

The use of its own memory ( 2 ) or a memory area for recording and storing the linkage information and other data required for the execution of the method according to the invention has the advantage that the control program for the microcomputer ( 1 ) does not have to be changed, as would be necessary with the prior art mentioned at the beginning. As a result, a relatively high degree of flexibility with high security against input and operating errors can be achieved.

In Fig. 2 is shown in table form, which results a logical conjunction and a logical disjunction in the logical combination of two input variables (p, q). The result of a logical negation is also shown for the input variable (p). The quantities (p, q) are used symbolically for the input signals (a, b, c, d). The result of a logical conjunction (AND operation) is shown in column ( 20 ). The result of a logical disjunction (OR operation) is shown in column ( 21 ). The result of a logical negation (inversion) is shown in column ( 22 ).

If a combination of more than two input variables is required, this combination is carried out in several stages. If, for example, three input variables are to be linked to one another in accordance with a logical conjunction, first a linkage of two of the input variables according to the table in FIG. 2 is carried out and then in a second step a linkage of the output variable previously created from the linkage with the third input size made. The resulting output variable is the desired logical combination of all three input variables.

Claims (9)

1. Method for controlling the operating functions of a vehicle, in which the operating functions can be switched on and off by evaluating input variables when certain value combinations of these input variables occur, characterized in that for the decision about switching the operating functions on or off in addition to the states "switched on" (E) and "switched off" (A) an intermediate state (Z) which can be determined as a result of certain different states of the input variables is taken into account. 2. The method according to claim 1, characterized in that that the intermediate state (Z) is incorrect when it occurs ter or implausible values of an input signal or if the input signal is defective generating signal generator is taken. 3. The method according to any one of the preceding claims, characterized in that the intermediate state (Z) is taken when an input signal enters a Assumes a value between a lower and a lower upper threshold. 4. The method according to any one of the preceding claims, characterized in that a conjunctive ver creating a signal representing the intermediate state (Z) occupies with a signal indicating the state "Switched off" (A) accepts the result as a result status "switched off" (A) results.   5. The method according to any one of the preceding claims, characterized in that a conjunctive ver creating a signal representing the intermediate state (Z) occupies with a signal that is another State as "switched off" (A), as result nis gives the intermediate state (Z). 6. The method according to any one of the preceding claims, characterized in that a disjunctive ver creating a signal representing the intermediate state (Z) occupies with a signal indicating the state "On" (E) accepts the result as a result status "switched on" (E) results. 7. The method according to any one of the preceding claims, characterized in that a disjunctive ver creating a signal representing the intermediate state (Z) occupies with a signal that is another State as "switched on" (E) assumes as a result nis gives the intermediate state (Z). 8. The method according to any one of the preceding claims, characterized in that data from a serial len data bus system, in particular a CAN data bus system, can be processed as input signals. 9. The method according to any one of the preceding claims, characterized in that a switching information for switching operating functions on or off of the vehicle via a data bus system, in particular a CAN data bus system, are transferable.