Classifications

• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B60—VEHICLES IN GENERAL
  • B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
  • B60K35/00—Instruments specially adapted for vehicles; Arrangement of instruments in or on vehicles
• • G—PHYSICS
  • G01—MEASURING; TESTING
  • G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
  • G01F9/00—Measuring volume flow relative to another variable, e.g. of liquid fuel for an engine
  • G01F9/001—Measuring volume flow relative to another variable, e.g. of liquid fuel for an engine with electric, electro-mechanic or electronic means
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B60—VEHICLES IN GENERAL
  • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
  • B60L2250/00—Driver interactions
  • B60L2250/16—Driver interactions by display

Definitions

• the invention relates to a display device for motor vehicles and a method for controlling a display device for motor vehicles.
• SCR Selective Catalytic Reduction
• AdBlue consumption can be between 2 and 6, depending on the engine equipment and driving style Volume percent of diesel consumption fluctuate. Based on the reasonable assumption that the tank volume for the additive AdBlue will in any case be selected so that a filled AdBlue tank is always sufficient for the range of at least one full diesel tank, the combination of the different diesel tank volumes with different possible AdBlue Tank volumes nevertheless result in very different range ratios from AdBlue to diesel.
• the combination of a diesel tank with a capacity of 380 liters and an AdBlue tank with a capacity of 25 liters results in a range ratio of the AdBlue supply to the diesel supply of 1.1; ie a full AdBlue tank is sufficient for 1.1 diesel tank fillings.
• the same type of vehicle can also be equipped with a diesel tank with a capacity of 125 liters and an AdBlue tank with a capacity of 45 liters, which results in a range ratio of 6 full diesel tanks to a full AdBlue tank.
• AdBlue-to-diesel range ratios which vary greatly from vehicle to vehicle
• a conventional level indicator of the tank content of AdBlue which corresponds to the state of the art for the display of tank contents, is unsuitable for professional drivers who normally have to manage frequent vehicle changes: For example, if the level is 14% of the AdBlue tank volume Reserve indicator for this tank lights up, this level could still be sufficient under suitable conditions for the range of another full diesel tank; the display of the AdBlue level does not give the driver any meaning if he does not know the ratio of the volume of the diesel and AdBlue tanks. And even if he knows this ratio, he would still have to relate it to the ratio of diesel and AdBlue consumption in order to understand the importance of the fill level indicator for AdBlue. Such a consumption relationship between the diesel fill level and AdBlue fillings and could only be learned through longer use of vehicles with the same tank ratios and consumption relationships through habituation. This situation is usually not the case for professional drivers.
• a display for estimating the range of the AdBlue supply should therefore be designed for a professional driver in such a way that a separate refueling stop for this additive can be avoided. And since there will initially be no nationwide supply of petrol stations with AdBlue, it is important for the driver that the display allows him to plan fuel stops for the admission of AdBlue in advance.
• DE 39 36 373 AI describes a device for motor vehicles for the visual representation of two values.
• One of the two values indicates a size dependent on the fuel supply and the other value shows a size dependent on the fuel consumption.
• the two values are compared with each other in the sense of forming a difference, so that the driver can estimate the range for the fuel supply from the relationship between fuel supply and current fuel consumption shown.
• this display it is possible to estimate the range of the fuel supply more precisely to get - especially depending on the driving style - than this is possible with a sole display of the remaining fuel supply.
• this form of display is not suitable for solving the problem of estimating the range for two combined operating materials.
• DE 199 59 597 Cl describes a method and a device for the optical display of information in motor vehicles.
• two variables that are related are shown in comparison, the comparison being carried out by displaying the variables in succession on a display at the same location.
• the interdependencies relate to such value pairs as tank content / range, range / distance, instantaneous consumption / average consumption, total journey time / journey time traveled. This means that the comparison either takes place in relation to the same physical unit and then clarifies an existing difference, or it is - in the case of displaying the value pair tank content / range - a conversion of a physical unit less meaningful for the driver into made another, more meaningful.
• the object of the invention is to provide a display device and a method for motor vehicles, with which the refilling of an additive that is not available at all petrol stations and is required for the operation of the vehicle can be planned in such a way that refueling stops can only be avoided due to refueling with the additive ,
• the driver can see at a glance whether the existing additive supply is available for further full refueling sufficient or not with fuel because the range of the additive supply is shown in relation to the range of a full fuel tank. This means that if there is a sufficient range for a full fuel tank - hereinafter referred to as full range - when the additive fuel is running low, the driver is free to choose the next filling station when it comes to offering the additive. If at some point less fuel than the full range for the additive is displayed when the fuel supply drops, this means for the driver that the additive should also be refilled the next time the vehicle is refueled, in order to avoid a later fuel stop due to the additive.
• range is not to be understood explicitly here as a mileage.
• the display device according to the invention is suitable, for example, as a display of the range of the fuel supply, as is the display of the tank content, since this can usually be interpreted with sufficient accuracy by the driver as a range with regard to the next due fuel stop.
• information on the fuel supply or mileage are equivalent, especially since mileage information is not a final figure, but must be corrected depending on the driving style or terrain.
• a display of a range for the fuel supply is therefore also understood to mean a direct indication of the fuel supply. This equation of supply and range with regard to the assessment of a range applies only to the fuel.
• the display device shows a lower value than the full range for the range of the additive supply in the subsequent driving operation after a full refueling with which the full range for the additive was still given, this value cannot decrease faster , as the value for the range of the fuel supply, because the reference quantity for representing the range of the additive according to the invention is the full fuel tank, and at the time of refueling with Fuel the range of the additive was given for a full fuel tank.
• the fuel and additive supply containers are designed so that a fully filled additive supply is sufficient for more than the consumption of a full fuel tank, if the driver behaves according to the displayed values when searching for a petrol station , the additive supply never runs out before the fuel supply. Due to the described properties of the display device according to the invention and the method for activating the display device, refueling stops can only be avoided because the additive has to be filled, because when the vehicle is about to be refueled with fuel, the range relationship of the additive supply to the maximum fuel volume is shown According to the invention, it is immediately apparent whether the additive cannot be refilled or not.
• the additive supply is no longer sufficient for the range of the available fuel supply can only occur in the display device according to the invention if the additive is not refilled during refueling that follows an additive range indicated as decreasing .
• the decreasing additive supply is shown as the range with respect to a full fuel tank and not as an absolute size for the supply, the driver can use this display to plan the accessibility of a suitable petrol station in the same way as for an empty fuel tank; For example, if a range of the additive supply for half a fuel tank is displayed, he knows that he is looking for a gas station with an offer of the additive must behave as if he only had a half-filled fuel tank.
• the relationship of the additive range to the fuel range is advantageously calculated by calculating the ratio ART from the absolute range of the additive supply AR and the range of a full fuel tank KTR according to AR / KTR, the range AR being calculated from the quotient of the current additive supply AV and the current consumption of the additive AC, and the range of the full fuel tank KRT from the quotient of the maximum fuel supply KTV and the current fuel consumption KC.
• the dimensionless ratio value ART indicates for which fuel level (or for which fuel range) the existing additive supply is still sufficient.
• the ART value can be greater than 1 or a multiple thereof. This value is advantageously limited to the value 1 for the representation of the range of the additive.
• additive ranges which are above the range of a full fuel tank distracts unnecessarily, since the driver is only interested in whether it is necessary to refill the additive at the next fuel stop or not.
• a simpler but less precise relationship between additive range and fuel range could also be established, for example, by calculating a ratio AV / KTV - normalized with regard to a suitable constant for the ratio of ranges from maximum additive supply to maximum fuel supply - which is independent of the current consumption.
• a display element for displaying a reserve range of the additive supply is integrated. This is advantageously controlled so that it signals when the reserve range of the additive and the reserve range of the fuel supply decrease.
• the reserve range of the fuel is usually determined by reaching or falling below a certain fuel level, and is signaled by a display element on the fuel gauge or other messages.
• the electronically controllable display elements can be implemented by pointers and / or LED display elements. If the range of the fuel is displayed as the tank content, it is advantageous to use a pointer for this display, since this corresponds to the usual, and therefore easy to understand, form of display. It is irrelevant whether a pointer as such takes on this function or whether a pointer is shown on a display. Range information can of course also be given in the form of kilometers, which can be displayed analogously, for example by bar graphs, along corresponding scales or as digital values. This can also be done by means of a display or with LED display elements, which have the advantage of a clearer contrast compared to the use of a display.
• an advantageous embodiment of the display device is obtained when a first display element for displaying the range of the fuel supply is present and a second display element for displaying the range of the additive supply in relation to a full fuel tank is present, and both display elements together on one scale are related.
• the scale can be a division for displaying the tank content.
• a value for the fuel supply can and will, as has already been stated several times, usually also be interpreted as a range, especially since typical fuel gauge scales are not scaled according to liters, but the reading of a filling level - full, three-quarter, half, quarter full or empty - allow. Due to this dimensionless design, the fuel needle can be interpreted as full, three-quarter, half, quarter or reserve range.
• scales with kilometers are also suitable for displaying the ranges.
• the first display element shows the fuel level and thus enables the range to be estimated.
• the ratio of the range of the additive supply to the reference quantity "fuel tank volume” or “full range” is advantageously made visible, and in combination with the display of the current fuel quantity, the ratio of the two ranges to one another is immediately visible.
• the driver By displaying the two values along a common scale, the driver is precisely informed about the range of the supplies of his operating materials and which material is sufficient. If, for example, the display elements for the ranges of the two operating materials - fuel and additive - are each represented by a pointer, and if one pointer shows a greater value than the other on the common scale, the relationship according to the invention can be used to read which one the operating materials represented by the pointers are held for longer.
• a particularly advantageous embodiment results when the first display element is implemented by a pointer and the second display element is implemented by a plurality of LED display elements which are arranged along the entire scale, and with so many LED display elements in series - starting at the origin of the scale - activated one after the other in a luminous manner that the luminous LED display elements indicate the value for the range of the additive supply in relation to a full fuel tank.
• the fact that the ranges for the two operating materials are displayed with differently designed display elements - a pointer for the fuel, LED display elements for the additive - means that the two quantities displayed on the same scale are confused, as is the case, for example, in an embodiment with two, if differently shaped hands could occur.
• the use of a pointer as the first display element corresponds to the standard for the display of fuel gauges and therefore requires no getting used to.
• the display of the additive range by means of luminous LED display elements along the scale allows the driver to see the two displayed quantities and their relationship to one another at a glance, without confusion.
• the scale is curved and the LED display elements arranged along the entire scale are designed to be curved accordingly.
• An arcuate scale corresponds to the standard version of a fuel gauge and therefore fulfills the expectations regarding the execution of such a display. This facilitates visual orientation.
• the adaptation of the LED display elements in shape and arrangement to the arcuate scale ensures a closed, visually comprehensible design of the display device.
• An embodiment of the second display element with four LED display elements offers sufficient accuracy for estimating the ranges.
• Four LED display elements that are controlled according to the following conditions: the first LED display element arranged at the origin of the scale is switched on when ART> the subsequent second LED display element is switched on when ART>% the subsequent third LED -Display element is switched on when ART> 3 A the subsequent fourth LED display element is switched on when ART 1 allow the driver to read five different statements regarding the additive range from the display device according to the invention: all four LED display elements light up: the additive supply is sufficient for one full or another full fuel tank.
• additive is sufficient for at least half a fuel tank, but no longer for a three-quarter one.
• an LED indicator element lights up: additive is sufficient for at least a quarter, but no longer for a half-full fuel tank.
• a range calculation - both for the fuel and for an additive that is dependent on the fuel in a non-linear manner in terms of fuel consumption - usually includes many factors, including the engine speed.
• the values resulting from this calculation fluctuate depending on changing conditions, such as driving style or terrain, so that neither the fuel consumption itself nor the additive consumption dependent on it decrease linearly. Taking the fluctuations in consumption into account when displaying the ranges is too irritating rather than helpful to the driver. When only 5 or 6 states are displayed, fluctuating factors are excluded sufficiently smoothed.
• the display device according to the invention is not too complex when the second display element is implemented by four LED display elements, also in terms of device technology.
• the LED display elements for displaying the range of the additive in accordance with a general color coding of the additive. If the additive is provided with a general color coding, it increases the intuitive understanding of the display device, with regard to the values represented for the additive, if the LED display elements are designed in this color, by immediately making it clear that the LED display elements relate to one another Cover the fabric with this color.
• Fig. 1 shows an embodiment of the display device according to the invention.
• the exemplary embodiment shows a fuel gauge with a semicircular scale 3 for displaying the fuel supply and with a pointer 1 for displaying the current fuel supply.
• the fuel supply displayed in this way is usually interpreted by the driver as a range for the question of when the next fuel stop is due.
• a scale for displaying the fuel supply is thus also suitable as a scale for visually estimating the range of the fuel supply. Of course, scales with kilometers are also suitable for this.
• LED display elements 2 are arranged along the scale 3 for displaying the fuel supply.
• the individual figures la to le represent the different, for the te of the additive supply in terms of the range of the fuel supply differentiable states.
• the constellation of the display elements shown in Fig. La - with four illuminated LED display elements 2 and the pointer 1 at any point on the scale - signals to the driver that, in this constellation, he carries out fueling that the additive for at least one full tank is sufficient, so there is no need to refill this tank stop.
• the constellations of the display elements shown in FIGS. 1b and 1c - with three or two illuminated LED display elements and the pointer at one point within the area illuminated by the LED elements - state that the additive supply for the existing one Sufficient fuel is available and the additive should be refilled at the next fuel stop.
• the constellation shown in Fig. 1d - with an illuminated LED display element and the pointer at a point outside the area illuminated by the LED elements - means that the additive supply is no longer sufficient for the available fuel supply and therefore a refueling stop to refill the additive must be planned.
• the constellation shown in Fig. Le in which none of the four LED display elements is switched on, means that the additive supply is only sufficient for less than a quarter of the range of a full fuel tank.
• FIG. 2 shows another embodiment of the display device according to the invention with the same elements 1 and 2 and with a scale 3 designed as a quarter circle.

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• Engineering & Computer Science (AREA)
• Transportation (AREA)
• General Physics & Mathematics (AREA)
• Chemical & Material Sciences (AREA)
• Fluid Mechanics (AREA)
• Combustion & Propulsion (AREA)
• Physics & Mathematics (AREA)
• Mechanical Engineering (AREA)
• Level Indicators Using A Float (AREA)
• Instrument Panels (AREA)
• Cooling, Air Intake And Gas Exhaust, And Fuel Tank Arrangements In Propulsion Units (AREA)
• Exhaust Gas After Treatment (AREA)
• Control Of Indicators Other Than Cathode Ray Tubes (AREA)
• Measuring Volume Flow (AREA)

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• 2003
  • 2003-07-07 DE DE10330741A patent/DE10330741A1/de not_active Withdrawn
• 2004
  • 2004-07-02 JP JP2006518090A patent/JP2007526846A/ja active Pending
  • 2004-07-02 WO PCT/EP2004/007182 patent/WO2005002902A1/de active Application Filing
  • 2004-07-02 US US10/563,666 patent/US20070273494A1/en not_active Abandoned
  • 2004-07-02 EP EP04740546A patent/EP1641649A1/de not_active Withdrawn
  • 2004-07-02 CN CNA2004800194478A patent/CN1819936A/zh active Pending
  • 2004-07-02 KR KR1020067000387A patent/KR100752483B1/ko not_active IP Right Cessation

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