Title of Invention

METHOD AND SYSTEM FOR IMPROVED AUTOMATIC CONTROL OF ONE OR SEVERAL FUNCTIONS IN A VEHICLE

Abstract

The invention relates to a method for improved automatic control of a function in a terrestrial vehicle, comprising automatic control of the function, determination of the position of the vehicle on the ground (x, y), and comparison of the position of the vehicle with one or several previously stored positions .The previously stored positions are positions where it has been determined that, the control automation has carried out a control that was outside a predetermined permitted range on previous occasions, and if the determined position of the vehicle conform with one of the previously stored positions, special previously stored control information is used to reduce the risk of the control being outside said predetermined permitted range yet again. The invention can also comprise evaluation of the automatic control of one or several functions in the vehicle, and storage of position ( x, y) on the ground at which the evaluation has shown that the automatic control has carried out a measure that was outside said predetermined permitted range. To The Controller of Patents, The Patent Office, Mumbai. Function 'X' Coordinates (x, y) warning point (x,y) End point (x,y} Control- ∆ -.■• FIG. 4

Full Text

FORM 2 THE PATENT ACT 1970 (39 of 1970) & The Patents Rules, 2003 COMPLETE SPECIFICATION (See Section 10, and rule 13) 1. TITLE OF INVENTION METHOD AND SYSTEM FOR IMPROVED AUTOMATIC CONTROL OF ONE SEVERAL FUNCTIONS IN A VEHICLE 2 APPLICANT(S) a) Name : VOLVO LASTVAGNAR AB b) Nationality : SWEDISH Company C) Address : S-405 08 GOTEBORG, SWEDEN PREAMBLE TO THE DESCRIPTION The following specification particularly describes t invention and the manner in which it is to be performed : - Method and system for improved automatic control of one or several functions in a vehicle. TECHNICAL FIELD The present invention relates to a method and a system for improved automatic control of one or several functions in a vehicle. The invention is primarily intended for vehicles that have a great deal of automation for controlling different functions in the vehicle, in particular for the drive line in the vehicle. The invention also relates to a computer program and computer program product for causing a computer to carry out the method according to the invention. BACKGROUND ART In many vehicles of different types it is becoming increasingly common to have automatic control of various functions in the vehicle. Examples of functions that are controlled by automation are the drive line, in other words the whole sequence from the chemical conversion of the fuel to propulsive force for one or several wheels, the braking system, the air-conditioning system, the maintenance system, and the chassis control system. Many other functions can nowadays also be controlled by automation. Automatic control of the various functions makes the task of the driver easier, but there is always a possibility that automatic control of functions can lead to incorrect measures being taken, for example changing to a higher or lower gear than what is actually required, or connection/disconnection of a function. The fact that the automation carries out incorrect measures or connects/disconnects functions when this has not been required, is of course not desirable, as among other things it can lead to non-optimal operation of the vehicle and, last but not least, frustration in the driver due to the fact that the automation is not carrying out its tasks properly. 2 The frustration in the driver can been increased by the fact that lorries, for exampte, are often driven on one and the same route, which means that the driver learns to recognize the places where the automation tends to make mistakes. DISCLOSURE OF INVENTION There is thus a need to be able to improve or optimize the automatic control of one or several functions in the vehicle. It is a given requirement that such optimization is to be as simple and reliable as possible. The said need and requirement are fulfilled by the present invention as it describes a method for improved automatic control of one or several functions in a terrestrial vehicle, comprising the following : - automatic control of one or several functions in the vehicle, - determination of the vehicle's position on the ground, - comparison of the vehicle's position with one or several previously stored positions. According to the invention, the previously stored positions are positions where it has been determined that the control automation has carried out a control that was outside a predetermined permitted range on previous occasions, and if the determined position of the vehicle conforms with one of the previously stored positions, special previously stored control information is used to reduce the risk of the control being outside said predetermined permitted range yet again. As the comparison of the position of the vehicle with one (or several) previously stored positions is used in order to be able to use the previously stored control information if the position of the vehicle conforms with one of the previously stored positions, it is possible for the automation to "recognize"places where the automation has made mistakes previously, which in turn makes it possible to ensure that the mistake is not repeated the next time the vehicle is in such a place, or at least that the risk is reduced of the mistake being repeated the next time the vehicle is in a previously known position where a mistake has been made by the automation. The 3 invention also suitably comprises evaluation of the automatic control of one or several functions in the vehicle, and storage of positions on the ground at which the evaluation has shown that the automatic control has carried out a measure that was outside said predetermined permitted range. This means that the system can be updated continuously with regard to “new" positions where a special control may be necessary. The determination of the vehicle's coordinates can be carried out in a number of different ways, either by using external signal sources, for example GPS or another satellite navigation system. The determination of the vehicle's coordinates can, however, also be carried out by using calculation means that are internal in the vehicle. The invention also relates to a system provided with different means for carrying out the method according to the invention. DESCRIPTION OF DRAWINGS The invention will be described in greater detail in the following, with reference to the attached drawings, in which Figure 1 and Figure 2 show schematically two operational sequences in a vehicle with automatic control of the gearbox, and Figure 3 is a simplified flow chart of a method according to the invention, and Figure 4 is a table for a function according to the invention. EMBODIMENTS The invention will be described, by way of introduction, for a vehicle with an automatic gearbox. It should, however, be recognized that the principle according to the invention can be used for practically any automatically controlled function in a vehicle : Examples of other functions will also be given in the following description. 4 Figure 1 shows schematically a vehicle, a lorry, that is driving up a hill. The vehicle is equipped with an automatic gearbox which has caused the vehicle's gearbox to select a particular gear, for example 11th gear, at a point A on the uphill gradient, on the basis of various criteria such as, among other things, the resistance to forward motion, the throttle position and the overall weight. At a point B that is located after point A, the gearbox automation determines that the vehicle is to change down to 10th gear, in response to the load on the vehicle's driveline. When the change down is carried out, however, the vehicle has just reached the top of the hill, which means that a short time after the change down (11th gear to 10th gear) has been carried out, the automation causes the gearbox to change back up to 11th gear. The change down that was carried out was thus unnecessary, which among other things will be noticed by the driver of the vehicle. The unnecessary gear change will also cause a deterioration in fuel economy and a lower average speed. A possible way of avoiding incorrect control of functions that are controlled by automation is, for example, to provide the vehicle with a map database so that incorrect control can be avoided by the automation making use of the map data for controlling the vehicle. With the use of such a system, the unwanted change down in the example above would have been avoided, as the system would have read the height data from the database, and accordingly would have realized that the top of the hill was going to be reached shortly, and that the change down was unnecessary. A disadvantage of such a solution is, however, that map databases are not available for all geographical areas. In addition, map databases with height data have certain disadvantages, such as, for example, that the fact that they do not have information about other important features, for example where traffic lanes merge or separate, the location of junctions, traffic lights, traffic-calming measures, recurring light and climate conditions, etc. 5 A solution that is not dependent upon map databases is therefore preferable. Figure 2 shows a vehicle equipped with a system according to the present invention, the function of which will be described below, with reference to corresponding boxes in the simplified flow chart in Figure 3. In other words, Figure 2 thus shows a system which succeeds in meeting the requirements that have been listed above, including the requirement of being independent of map databases. The vehide comprises contro) means (not shown explicitly) for automatic control of one or several functions in the vehicle, and comprises, in addition, a device (not shown) for determining the position (310) of the vehicle on the ground, in other words the coordinates that are usually called x and y. The height coordinate z can, of course, be included in such a system, but is not central to the invention and will therefore not be described in greater detail. The device or means for determining the position of the vehicle can be implemented in a large number of ways that will be known to experts in the field, but can include, for example, means for satellite navigation, for example GFS, and devices for inertia navigation. The control means can similarly be implemented in a large number of different ways, the precise details of which are not of central significance to the invention, but can suitably comprise a microprocessor or other type of computer unit. The position of the vehicle on the ground is suitably determined continually while the vehicle is in motion by the means for this purpose, and the system in the vehicle comprises means for comparing (320) continually or at fixed intervals the vehicle's coordinates with coordinates that have been previously stored, for example in one or several tables. 6 The previously stored positions are positions where it has been ascertained that the control automation has carried out a control on previous occasions that was outside the predetermined permitted range, in other words that the control automation has made an error or a mistake. The system according to the invention with which the vehicle is equipped comprises, in addition, means for carrying out the comparison (320) of the coordinates, and, if the position of the vehicle conforms to one of the previously stored positions, for reaching a decision (330) concerning whether the control system is to use special previously stored control information. This special control information suitably comprises information based on errors or mistakes that the control automation has made at the coordinates in question on previous occasions, so that the danger of the control being outside said predetermined permitted range yet again is reduced and, if possible, eliminated. By means of the described arrangement according to the invention, the control automation can thus recognize places where the control automation has made errors or mistakes previously, and reduce the risk of repeating these errors or mistakes the next time that the vehicle reaches the same place. The system according to the invention comprises, in addition, means for evaluating (311) the automatic control of one or several functions in the vehicle. This makes it possible to detect new errors or mistakes (321) while the vehicle is in motion, and to store the coordinates for these (331) so that they can be included in the positions that the system compares in order to avoid errors or mistakes. It is suitably not just the coordinates for positions where errors or mistakes have been made that are stored, but also information about the type of mistake, in order to make it easier for the automation to reach a better decision the next time the vehicle reaches the same place. 7 Referring again to Figure 1 and Figure 2, it will now be described how the system according to the invention improves the control automation: the means for evaluating the control has determined (321) that a mistake has been made (changing down at point B) after the first time that the vehicle was at the coordinates in question, and has stored (331) the coordinates (xB, YB) on the ground for this, along with information for preventing the mistake. As the mistake in the present example was an unnecessary change down, the system according to the invention has stored control information which means that the vehicle adjusts the limits for when changing down is to be carried out the next time it reaches the coordinates (xB, YB) in question. The fact that an incorrect control has been carried out is determined by the automation investigating whether certain parameters are within a permitted range. In the case of changing gear, an example of such a parameter can be the engine speed, or alternatively the distance over which the selected gear is to be retained, in other words the distance from the point B to the top of the hill. If this distance is shorter than a certain predetermined limit, the automation can be allowed to regard the change down as unnecessary, and therefore to enter the coordinates for the point B in a memory. When the components comprised in the system and described above have thus determined that the vehicle is again at the point B (320), the control automation will adjust the limits that normally apply for when a change down is to take place (330). As it is not possible to be certain that the same conditions that applied when the incorrect change down was carried out will also apply when the vehicle returns to the same place, it is inappropriate to introduce a total prohibition on the automation changing down (the vehicle can be more heavily laden, the road surface can be slippery, there can be strong headwind, etc). In other words, at the point B the ordinary control automation for the gearbox is bypassed, and other rules that in this case are "more stringent “ are applied, without however introducing a total prohibition on changing down. If, for example, the engine speed of the vehicle in combination 8 with a particular time limit are the parameters used by the gearbox automation, the time, for example, for a certain engine speed limit can be extended at the point B, for example up to a point C when the vehicle is calculated to have passed the top of the hill. The comparison of the position of the vehicle with “error positions" is suitably carried out by a number of tables with positions being stored in the system in the vehicle, suitably one table per function that is to be affected by the invention. Each table thus comprises information about “error positions" or positions where different limit values or control conditions to the "normal" are to apply. In order to enable the automation to compensate for changes (such as, for example, different overall weight, wind speed, road surface conditions) it is also expedient, but not necessary, for the automation to obtain information about the positions at which the adjusted limit values or control conditions are to apply a certain distance before the actual position. With reference to the gearbox automation and the point A in Figure 1 and in Figure 2, this could be expressed in words as follows : "a hundred metres (for example) before the position where the gearbox automation has made a mistake on a previous occasion, the gearbox automation is to replace the normal control rules with other rules according to the table in order to avoid making the same mistake again". Concerning the use of the special control information, it is possible for the automation to use it for a certain predetermined distance or time from the time when it is started to be used. Alternatively, coordinates can be stored in the system for when the normal control is to start to be used again. It is also possible for the position comparison to be carried out with a certain degree of tolerance. The tolerance in question can be one and the same for all the positions in the system, or different per function, or different per function and position. 9 In order to make the invention clearer, Figure 4 shows a table for use in a system according to the invention: one table per function is preferably used in a system according to the invention for the functions that have automatic control, but this can, of course, be carried out in another way within the framework of the invention. As has been described above, the table in Figure 4 contains coordinates for the point at which the automation is to use other rules than the normal ones. In addition, the table can contain the coordinates-suitably set individually for each function-for a "warning point", in other words a point a certain distance before the point at which the automation is to use other rules than the normal ones, and the coordinates for an"end point", in other words a point at which the automation is to resume the normal function. The end point can also be expressed as an end time. In addition to said coordinates, the table also contains data about the rules that are to apply at the point in question. These rules can be many different kinds, for example a prohibition on carrying out a certain control or compulsion to carry out a certain control, or stricter or less strict limits for when a certain control is to be implemented. If the limits are to be stricter or less strict, the table suitably contains information about how much stricter or less strict the limits are to be, which is, as shown in the table in Figure 4, given as a" A-value", which can be either positive or negative. The invention has been described above primarily by means of an example that illustrates the invention applied to gearbox automation, but it should be recognized that the invention can be applied in principle to any automatic control in a vehicle. Other examples of possible controls that can use the invention are air-conditioning automation and other types of environment- optimizing controls. The invention is primarily intended for terrestrial vehicles, and primarily vehicles that are road-going, in other words wheeled vehicles. 10 WE CLAIM: 1. A method for improved automatic control of one or several functions in a terrestrial vehicle, comprising the following : - automatic control of one or several functions in the vehicle, - determination (310) of the position of the vehicle on the ground (x, y), - comparison (320) of the position of the vehicle with one or several previously stored positions, characterized in that - the previously stored positions are positions where it has been determined (321) that the control automation has carried out a control that was outside a predetermined permitted range on previous occasions, and - if the determined position of the vehicle conforms with one of the previously stored positions, special previously stored control information is used (340) to reduce the risk of the control being outside said predetermined permitted range yet again. 2. The method as claimed in claim 1, also comprising evaluation (311) of the automatic control of one or several functions in the vehicle, and storage (331) of positions (x, y) on the ground at which the evaluation has shown that the automatic control has carried out a measure that was outside said predetermined permitted range. 3. The method as claimed in any one of claims 1 or 2, according to which the positions with which comparison of the position of the vehicle is made comprise the positions at which the evaluation has shown that the automatic control has carried out a measure that was outside said predetermined permitted range. 4. The method as claimed in any one of the preceding claims, according to which the comparison of the position of the vehicle with the previously stored positions is carried out with a predetermined tolerance, so that the special 11 control information can be called into play or prepared for use without the precise position having been reached. 5. The method as claimed in any one of the preceding claims, according to which the special control information is utilized for a predetermined distance or time before and after the previously stored position has been reached. 6. The method as claimed in any one of claims 1-5, according to which the determination of the position (310) of the vehicle on the ground is carried out by using an external signal source. 7. The method as claimed in any one of claims 1-5, according to which the determination (310) of the position of the vehicle on the ground is carried out by using calculation means in the vehicle. 8. The method as claimed in any one of claims 1-7, according to which the previously stored positions are stored in tables, with one table per function for the functions that are controlled by the automation. 9. The method as claimed in any one of the preceding claims, in which said one or several functions consist of the driveline control. 10. A system for improved automatic control of one or several functions in a vehicle, comprising: - control means for automatic control of one or several functions in the vehicle, - position determination means for determination of the position of the vehicle on the ground (x, y), - comparison means for comparison of the position of the vehicle with one or several positions that have been previously stored in the system, characterized in that the previously stored positions are positions where the control automation has carried out a control that was outside a predetermined permitted range on previous occasions, and in that the system comprises decision-making means for 12 evaluating the position comparison, which decision-making means determines that the control means is to use special previously stored control information, if the position of the vehicle conforms with one of the previously stored positions. 11. The system as claimed in claim 10, also comprising evaluation means for evaluating the automatic control of one or several functions in the vehicle, and storage means for storing positions (x, y) on the ground at which the evaluation means has shown that the automatic control has carried out a measure that was outside a predetermined permitted range. 12. The system as claimed in any one of claims 10 or 11, in which the storage means adds the stored positions to the positions utilized by the comparison means. 13. The system as claimed in any one of claims 10-12, in which the comparison means utilizes a predetermined tolerance in the position comparison, so that the decision-making means can bring into play the special control information or prepare the special control information for use before the precise position has been reached. 14. The system as claimed in any one of claims 10-13, in which the decision-making means is arranged to ensure that the special control information is used for a predetermined distance or time from the time that it starts to be used. 15. The system as claimed in any one of claims 10-14, in which the position determination means comprises means for communication with an external signal source, using which signal source the position determination means determines the position of the vehicle on the ground (x, y). 13 16. The system as claimed in any one of claims 10-14, in which the position determination means is internal in the vehicle and comprises calculation means by which the position of the vehicle on the ground (x, y) is determined. 17. The system as claimed in any one of claims 10-16, in which the storage means stores the positions in tables, with one function per table for the functions that are controlled by the automation. 18. The system as claimed in any one of claims 10-17, applied on an automatic control of the driveline in a vehicle. 19. A computer program comprising program code for carrying out all the steps in claim 1 when said program is executed by a computer. 20. A computer program product comprising program code, stored on a medium that can be read by a computer, for carrying out all the steps in claim 1 when said computer program is executed by a computer. 21. A computer program product that can be loaded directly into an internal memory in a digital computer, comprising a computer program for carrying out all the steps in claim 1 when said computer program is executed by a computer. Dated this 30th day of November, 2005. HIRALCHANDRAKANT JOSHI AGENT FOR VOLVO LASTVAGNAR AB 14

Documents:

1331-mumnp-2005-abstract(17-4-2007).pdf

1331-mumnp-2005-abstract-(17-4-2007).doc

1331-mumnp-2005-cancelled pages(17-4-2007).pdf

1331-mumnp-2005-claim(granted)-(17-4-2007).doc

1331-mumnp-2005-claims(granted)-(17-4-2007).pdf

1331-mumnp-2005-claims.doc

1331-mumnp-2005-claims.pdf

1331-mumnp-2005-correspondence(17-4-2007).pdf

1331-mumnp-2005-correspondence(ipo)-(21-9-2007).pdf

1331-mumnp-2005-correspondence-others.pdf

1331-mumnp-2005-correspondence-received-ver-101105.pdf

1331-mumnp-2005-correspondence-received-ver-270306.pdf

1331-mumnp-2005-correspondence-received.pdf

1331-mumnp-2005-correspondence-send.pdf

1331-mumnp-2005-description (complete).pdf

1331-mumnp-2005-drawing(17-4-2007).pdf

1331-mumnp-2005-drawings.pdf

1331-mumnp-2005-form 1(30-11-2005).pdf

1331-mumnp-2005-form 18(17-4-2007).pdf

1331-mumnp-2005-form 2(granted)-(17-4-2007).doc

1331-mumnp-2005-form 2(granted)-(17-4-2007).pdf

1331-mumnp-2005-form 26(30-11-2005).pdf

1331-mumnp-2005-form 3(17-4-2007).pdf

1331-mumnp-2005-form 5(17-4-2007).pdf

1331-mumnp-2005-form-1.pdf

1331-mumnp-2005-form-18.pdf

1331-mumnp-2005-form-2.doc

1331-mumnp-2005-form-2.pdf

1331-mumnp-2005-form-26.pdf

1331-mumnp-2005-form-3.pdf

1331-mumnp-2005-form-5.pdf

1331-mumnp-2005-form-pct-ro-101.pdf

1331-mumnp-2005-pct-search report.pdf

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