DE102010013816A1 - Method for displaying information in motor vehicle, involves detecting and storing gearshift point and actual-value of engine identification number - Google Patents

Abstract

The method involves detecting and storing a gearshift point and an actual-value of an engine identification number. A gearshift-identification is detected and stored for identifying the gears. A reference-value is stored for the engine-identification number for two gearshift-identifications. The deviation of the actual-value of the engine identification number in a gearshift point is determined by the corresponding reference-value for the engine identification number. The deviation from the reference-value is simultaneously displayed in the motor vehicle for two gearshift-identifications. An independent claim is also included for a device for displaying information in a motor vehicle.

Description

The present invention relates to a method for displaying information in a motor vehicle with a manually operable multi-speed transmission. Furthermore, the invention relates to a device for displaying information in a motor vehicle with such a transmission, which has a detection unit for detecting and storing a gear change, the actual value of an engine code in this gear change and a gear change marking for the identification of the gears, between the was changed in the gear change.

The amount of fuel consumption and emissions of a motor vehicle are increasingly important to the user of the motor vehicle. They are significantly influenced by the driving style of the motor vehicle. For the driver, however, it is often difficult to know by what kind of driving he can reduce fuel consumption and emissions. In order to assist the driver in implementing optimal, low-consumption and low-emission driving, therefore, information relating to fuel consumption and vehicle emissions may be displayed to him. For example, it is known to continuously display the driver's current fuel consumption or average consumption on a display area in the vehicle.

From the DE 10 2008 064 023 A1 a method and a device for displaying a current operating point of a motor vehicle in conjunction with relevant information for the operation of the motor vehicle is known. In this case, the current operating point is displayed in association with engine efficiency ranges, with the individual engine efficiency ranges being distinguishably represented according to a corresponding rating. In this way, the driver can be supported in choosing a suitable gear and a suitable accelerator pedal position and thus in a consumption-optimized driving style.

From the EP 2 028 058 A2 is a motor vehicle with a display of a driving behavior in terms of fuel consumption descriptive information known. The motor vehicle comprises a manual transmission, a drive unit and a brake system, which are to be actively operated by the driver. A device of the motor vehicle continuously conveys a the operating behavior of the gearbox, the operating behavior of the drive unit and the operating behavior of the brake system descriptive information based on the operating parameters of the motor vehicle. This information is output from a display device.

It is the object of the present invention to provide a method and a device of the type mentioned by which the driver of the motor vehicle is supported to optimize his driving style in terms of fuel consumption and / or in terms of emissions of the motor vehicle.

This object is achieved by methods having the features of claim 1 and a device having the features of claim 8. Advantageous training and further developments emerge from the dependent claims.

In the method according to the invention, a gear change is detected and stored. Further, the actual value of an engine code at this gear change and a gear change flag for identifying the gears, which was changed during the gear change, recorded and stored. Furthermore, in each case one setpoint value for the engine code number is stored for at least two gearshift markings. In the method according to the invention, the deviation of the actual value of the engine code during a gear change from the corresponding target value for the engine code is determined. For at least two gearshift identifications, the deviations from the desired value are displayed simultaneously in the motor vehicle.

Under a manually operable gearbox is understood in the context of the invention, both a manual transmission, in which the user actuates a clutch and then by means of a gear shift changes the gear, as well as an automatic transmission, which is operated in an active switching mode in which the driver by pressing a control element can bring about a change between the gears manually, without it being necessary to operate a clutch.

The gear change flag indicates which gear has been changed, d. H. For example, it may indicate the gear to which gear has been switched. Furthermore, it may contain an indication of whether it has been switched from a lower gear or a higher gear to the respective gear.

In the method according to the invention, the driver is supported with regard to his shift behavior in order to optimize fuel consumption and vehicle emissions, ie in particular to reduce them. The target value for the engine code is set so that it indicates the optimum switching time, ie the switching time at which the fuel consumption and the vehicle emissions are as low as possible. In the method according to the invention, the driver is not only provides general information on whether its switching behavior is optimal in terms of fuel consumption and vehicle emissions. Rather, the driver is shown in detail for at least two gearshift markings the deviations from a desired value of an engine code at these gear changes. The driver can thus recognize separately for these two gear change labels, if he has chosen the switching times optimal.

The deviations from the nominal value of the engine code are preferably displayed simultaneously for all gearshift identifications in the motor vehicle. In this case, the driver can see for each gear whether he switched at the optimum time or how large the deviation was from the optimum.

According to one embodiment of the method according to the invention, a parameter in the motor vehicle is simultaneously displayed for at least two gearshift identifications, each dependent on the deviations from the target value of a specific gearshift identification for a defined number of gear changes. For example, the deviations from the nominal value are added up for a defined number of gear changes of a gearshift identification and for at least two gearshift identifications, in particular for all gearshift identifications, the added deviations from the nominal value are displayed simultaneously in the motor vehicle. Further, for the last eight shifts or the last eight shifts of each gear shift flag, an average of the deviations from the target value can be formed and displayed. The number of switching operations that can be taken into account can be parameterized. The value can also be determined differently for each gearshift identification or depending on the driving situation. In this way, the driver can be given a medium-term feedback for the last shifts separately for each gear.

The display of the deviation or the deviations from the desired value or the parameter is updated in particular after each gear change. In this way, the driver is continuously given feedback on his switching behavior.

In addition to the display of the parameter obtained from the last deviations, the deviation from the target value for the last gear change can be displayed in the method according to the invention. The driver thus receives immediate feedback on his last shift as well as feedback on a certain number of past shifts. These various feedbacks help the driver to find optimal shifting behavior in terms of fuel consumption and / or vehicle emissions.

In the display, for example, a first graphical element for the gear change marking and a second graphical element for displaying the deviation or the deviations from the desired value or the parameter can be displayed for each gear change marking. The distance of the second graphical element from the first graphical element represents the magnitude of the relative deviation or the relative deviation or the parameter. The position of the first and second graphical element can, for example, be the mean value of the deviations from the nominal value of a certain number of past Shifts of a specific gear change marking represent. In this case, for a short time interval after a gearshift, a third graphical element may be displayed whose position or magnitude represents the relative deviation from the target value for the last gearshift. In this way, the driver can be particularly vividly visualized switching behavior. He can capture and evaluate his switching behavior in this way very intuitively.

The target values for the engine code can be permanently stored in a memory for each gear change marking depending on the vehicle type. The setpoint values are then read out after each gear change and compared with the actual value of the engine code.

According to one embodiment of the method according to the invention, however, the setpoint values for the engine code are continuously calculated as a function of current parameters of the motor vehicle and then stored. For example, the setpoints can be determined and stored in a shift recommendation algorithm. In this way, different target values can be determined for different driving situations. For example, the target values for the gear change designations can be calculated as a function of the gradient of the traveled road. Furthermore, the ratio of the engine power to the vehicle acceleration can be taken into account in the calculation of the setpoint values, for example to take account of strong head wind or a smooth road surface.

The engine code is in particular the engine speed. In the method according to the invention, therefore, the value of the engine speed is detected during a gear change and stored and then compared with a desired value of the engine speed for the corresponding gear change. Preferably, the deviation from the target value for the engine speed is not as Absolute value, but only relative by the distance between two graphical elements or by the size of a graphical element.

The device according to the invention is characterized by a memory in which a nominal value for the engine code is stored for at least two gearshift identifications by an evaluation unit with which the deviation of the actual value of the engine code during a gearshift from the corresponding desired value for the engine identification number can be determined, and by a control device for controlling the display of a display unit, with which the deviations from the desired value can be simultaneously displayed in the motor vehicle for at least two gearshift markings.

The device according to the invention is in particular designed to carry out the method according to the invention described above completely or partially. The device thus also has the same advantages as the method according to the invention.

According to one embodiment of the device according to the invention, the latter also has an arithmetic unit with which the desired values for the engine code as a function of current parameters of the motor vehicle can be continuously calculated. In particular, the arithmetic unit can calculate a desired value for the engine speed for the individual gearshift markings as a function of the driving situation.

Finally, the invention relates to a motor vehicle with the display device described above.

The invention will now be explained with reference to an embodiment with reference to the drawings.

1 schematically shows an embodiment of the inventive device for displaying information in a motor vehicle and

2 shows a display generated by the inventive method on the display unit of the device according to the invention.

The device comprises a display unit 1 with a display area 2 , which is arranged in the interior of the vehicle so that it is clearly visible to at least one vehicle occupant, in particular the driver. The display area 1 can be provided by a display, in particular a liquid crystal display or plasma display, of any type. Furthermore, the display area 1 by means of a head-up display or a head-down display on a surface, such as a portion of the windshield, are projected in front of the driver.

The display unit 1 is with a control device 3 connected to which graphics data for displaying information on the display surface 2 can be generated. The control device 3 is also with a vehicle bus 6 via which data can be transmitted from various devices of the vehicle, which are required to generate the graphics data.

Furthermore, the device according to the invention comprises a detection device 4 that with the vehicle bus 6 , a downstream evaluation device 5 and a storage device 7 connected is. The detection device 4 detects a gear change. The data for detecting the gear change, for example, in the transmission of the motor vehicle by a sensor 9-1 won and over the vehicle bus 6 to the detection device 4 be transmitted. Furthermore, there is a sensor 9-2 provided, which continuously measures the engine speed and the vehicle bus 6 For example, transmits to a display instrument in the instrument cluster of the vehicle for displaying the engine speed. The detection device 4 detects the actual value of the engine speed as soon as a gear change has been detected. Furthermore, the detection device detects 4 as a gear change marking, between which gears the gear change has taken place, based on the data from the sensor 9-1 be transmitted. The gear change marking indicates, in particular, in which gear has been switched. Further, the gear change flag may indicate from which gear the gear change has taken place.

In the embodiment described here only gear changes are considered in a gear with higher translation, d. H. z. B. alternately from the first to the second gear, from the second to the third gear, from the third to the fourth gear, from the fourth to the fifth gear and from the fifth to the sixth gear. These gear changes are provided with different gear change labels. Alternatively, it would also be possible to detect the gear changes in gears with lower gear ratio. These could then be provided with further gear change labeling or a gear change tag could combine both a change from a lower gear and a gear change from a higher gear.

The data for the gear change and the associated actual value for the engine speed and the gear change flag are stored in a memory device 7 saved. Furthermore are in the storage device 7 for each gear change marking, target values for the engine speed are stored. The target values may be fixed and unchangeable in the storage device as pre-configurations depending on the vehicle type 7 be saved. In the present embodiment, however, the target values for the engine speed are constantly calculated as a function of current characteristics of the motor vehicle. This is an arithmetic unit 8th provided, which the required characteristics of the motor vehicle over the vehicle bus 6 be transmitted. For example, the arithmetic unit 8th take into account the change over time in vehicle speed, engine power and other parameters dependent on the driving situation when calculating the target value. The arithmetic unit 8th stores the calculated target values in the storage device 7 where old setpoints are continually overwritten by newly calculated setpoints.

It should be noted that the storage device 7 also in the detection device 4 can be integrated. It could be that of the detection device 4 recorded data also directly to the evaluation device 5 be transmitted, so that the data may be cached in any device of the device according to the invention.

The evaluation device 5 read those in the storage device 7 stored data and determines the deviation of the actual value of the engine speed at a gear change of the corresponding target value for the engine speed. This deviation can be obtained by subtracting the actual value from the desired value. Subsequently, the absolute amount is formed. In the evaluation device 5 For each gear change identification, a ring buffer is provided in which the deviations are stored. If, for example, when shifting from the second to the third gear, a deviation of 500 revolutions per minute results, this value is stored in the ring buffer for the gearshift indication "from the second to the third gear". N deviation values can be stored in the ring buffer of each gear change tag. If N deviation values are stored in the ring buffer and another deviation value is to be stored, the most recent deviation value is deleted and the new deviation value is stored. The last N deviation values are thus always stored in the ring buffer of a gear change identification. For example, the number N of values may be eight.

The evaluation device 5 calculates, after each shift, the arithmetic mean of the deviation values for each gear shift tag and transmits this data to the controller 3 , Alternatively, a moving average value of the deviation values or another parameter obtained from the deviations may also be formed and sent to the control device 3 be transmitted.

The following is with reference to 2 explains how the control device 3 based on that of the evaluation device 5 Data transferred Graphic data for displaying information on the display surface 2 of the motor vehicle generates:
In the case of the control device 3 The generated display becomes a graphical element for each gear change tag 10-2 to 10-6 generated. As in 2 shown are these elements 10-2 to 10-6 displayed side by side. The element contains a numeral which identifies the gear in which the gearshift change has taken place in the associated gearshift identification. Furthermore, it is indicated by a symbol 11 the current gear is indicated by the symbol 11 at the corresponding element 10-5 is pictured. In the in 2 Thus, the fifth gear is currently engaged.

Furthermore, for each gear change marking becomes a graphic element 12-2 to 12-6 shown. The Elements 12-2 to 12-6 indicate the mean of the deviation from the target value for the last N gear changes for each gear change flag. For this the elements become 12-2 to 12-6 at a certain distance above the associated graphical elements 10-2 to 10-6 indicated for the corresponding gear change marking. The distance of the element 12-2 to 12-6 from the associated element 10-2 to 10-6 represents the mean value of the relative deviations of the engine speed at a gear change flag from the associated target value of the engine speed for the gear change. On the basis of the distance of a graphical element 12-2 to 12-6 from the underlying graphic element 10-2 to 10-6 Thus, the driver can very quickly and intuitively grasp how far his shift into the corresponding gear deviates from the optimum. The closer the elements are 12-2 to 12-6 in the corresponding elements 10-2 to 10-6 the better the driver switches to the associated gear. At the in 2 Thus, in the second and third gear, the driver switches almost optimally, shifting to the fourth and sixth gear is in need of improvement, and shifting to the fifth gear is not optimal.

Furthermore, the control device generates 3 a graphic element 13 indicating the deviation of the actual value for the engine speed from the corresponding target value for the engine speed for the last gear change. The graphic element 13 is especially different color, z. B. in red. It appears only briefly after the last gear change. Also in this case shows the distance of the graphic element 13 from the associated element 12-2 to 12-6 the corresponding gear change marking on the quality of the last gear change. In the in 2 The case shown is the distance between the graphic element 13 and the graphic element 10-5 especially large, ie the engine speed when switching to fifth gear was not optimal, for example, the driver has switched at a much too high speed in the fifth gear. The deviation from the target value was even greater than the average deviation in the last N gear changes in the fifth gear at the last gear change.

By the display generated by the method according to the invention, the driver can train his shift behavior for a consumption-optimized and / or low-emission driving style, the display has a motivating effect on the driver. The driver endeavors to steadily organize the graphic elements of the display and to bring them into symmetry with respect to each other, so that the switching behavior for all gear changes approaches an optimum in terms of fuel consumption and vehicle emissions. The aim is for the driver, the circles of graphic symbols 12-2 to 12-6 In the medium and long term always congruent with the circles of graphic elements 10-2 to 10-6 to get and keep there. It is not necessary to show the driver specific values, ie absolute deviation values in revolutions per minute. As a result, the driver approaches the optimum by changing gears so that he develops a feel for his shift behavior.

LIST OF REFERENCE NUMBERS

1

display unit

2

display area

3

control device

4

detection device

5

evaluation

6

vehicle bus

7

storage device

8th

computer unit

9-1 and 9-2

sensors

10-2 to 10-6

graphic symbols for the gear change marking

11

Symbol for the current gear change

12-2 to 12-6

graphical symbols for the mean value of deviations from the setpoint for the last N gear changes

13

graphic symbol for the deviation from the setpoint for the last gear change

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

• DE 102008064023 A1 [0003]
• EP 2028058 A2 [0004]

Claims (10)

Method for displaying information in a motor vehicle with a manually operable multi-speed transmission, in which A gear change, the actual value of an engine code during this gear change and a gear change marking for the identification of the gears, which were changed during the gear change, are recorded and stored, - For each at least two gear change labels each a target value for the engine code is stored and the deviation of the actual value of the engine code is determined in a gear change of the corresponding target value for the engine code and - For at least two gear change labels the deviations from the target value are displayed simultaneously in the vehicle. A method according to claim 1, characterized in that for at least two gear change labels simultaneously a respective parameter in the motor vehicle is displayed, which is in each case dependent on the deviations from the target value for a defined number of gear changes. A method according to claim 1 or 2, characterized in that after each gear change, the display of the deviation (s) or the parameter is updated. Method according to one of the preceding claims, characterized in that also for the last gear change, the deviation from the target value is displayed. Method according to one of the preceding claims, characterized in that in the display for each gear change marking a first graphical element ( 10-2 to 10-6 ) for the gear change marking and a second graphic element ( 12-2 to 12-6 ) for displaying the deviation (s) from the desired value or the parameter, the distance of the second graphical element ( 12-2 to 12-6 ) of the first graphical element ( 10-2 to 10-6 ) represents the magnitude of the relative deviation (s) or parameter. Method according to one of the preceding claims, characterized in that the target values for the engine code as a function of current parameters of the motor vehicle are continuously calculated and then stored. Method according to one of the preceding claims characterized - that the engine code is the engine speed. Device for displaying information in a motor vehicle with a manually operable multi-speed transmission with - a detection device ( 4 ) for detecting and storing a gear change, the actual value of an engine code in this gear change and a gear change flag for indicating the gears, which was changed during the gear change, characterized by - a memory device ( 5 ), in each of which a nominal value for the engine code is stored for at least two gearshift identifications, - an evaluation device ( 5 ), with which the deviation of the actual value of the engine code can be determined during a gear change from the corresponding target value for the engine code, and - a control device ( 3 ) for controlling the display of a display unit ( 1 ), with which the deviations from the desired value can be simultaneously displayed in the motor vehicle for at least two gear change identifications. Apparatus according to claim 8, characterized in that a computing unit ( 8th ), with which the target values for the engine code as a function of current characteristics of the motor vehicle are continuously calculated. Motor vehicle with a display device according to one of claims 8 or 9.

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