DE102005035624A1 - Method and device for providing route-dependent driving instructions - Google Patents

Abstract

The invention relates to a method for providing route-dependent driving instructions to the driver of a motor vehicle, wherein the course of the motor vehicle (1) to be traveled route (100) is determined at least partially ahead and at least relative to the current vehicle position and the current driving condition of the motor vehicle (1 ) is determined, wherein at least one limit condition for the driving condition is determined, and an associated device. According to the invention, the ascertained at least one limit condition for the driving state allows driving and / or wear-optimized passage through the area (200) of the driving route (100) ahead of the motor vehicle (1), and at least one driving distance-dependent consumption and / or wear-relevant Driving instruction generated when the current driving condition does not meet the at least one boundary condition.

Description

The The invention relates to a method for providing route-dependent driving instructions according to the preamble of patent claim 1 and a device for providing route dependent driving instructions the preamble of claim 14.

The Economy in the operation of a vehicle, in particular one Commercial vehicle, hangs strongly from anticipatory driving off. By using the thrust energy of the vehicle, for example when approaching intersections or bends, Fuel can be saved and avoidance of load peaks can the wear of Tires and brake pads be reduced. This potential is currently being developed especially when driving through of curves insufficient exploited when the vehicle speed through the radius of curvature the road must be reduced and the course of the curve only too late is visible.

Known Restrict driver assistance systems usually to the issue of warning information to the To point drivers on a curve and a safe driving through the Enable curve.

For example, in the published patent application DE 199 52 92 A1 describes a method and an apparatus for providing route-dependent warning information to the driver of a motor vehicle, wherein the course of the driven by the motor vehicle route is at least partially determined in advance and at least relative to the current vehicle position. In addition, the current driving state of the motor vehicle and at least one limit condition for the driving state are determined, which enables a safe passage through the area of the road ahead to be traveled through. The at least one route-dependent warning information is generated if the current driving state does not satisfy the at least one boundary condition.

In the published patent application DE 101 49 285 A1 a predictive driver assistance system is described in which, based on the current route, warnings are issued to the driver and / or control interventions are made in the vehicle control. The current driving route of the vehicle is determined using previous driving routes of the vehicle. The driver assistance system described is, for example, a system for speed control, distance control, tracking and / or consumption optimization.

task The invention is a method and apparatus for providing of route dependent Provide driving instructions indicating the economy of vehicle operation increase.

The Invention solves this task by providing a method of deployment of route dependent Driving instructions with the features of claim 1 and by a device for providing route-dependent driving instructions with the features of claim 14.

advantageous embodiments and further developments of the invention are specified in the dependent claims.

at the method according to the invention is the course of the driving distance to be traveled by the motor vehicle at least partially proactive and at least relative to current vehicle position determined. Based on the course of the before the vehicle lying route can thus provide information about disposal be asked whether the driver, for example, the motor vehicle a legal or to steer a left turn or a roundabout, or whether to cross an intersection is. This is especially useful when in front of the motor vehicle lying route is not completely visible.

In addition will the current driving condition of the motor vehicle is determined. This can For example, the current speed or acceleration and / or the current weight and / or the length of the motor vehicle and / or the type of vehicle (semi-trailer, tipper, etc.) and / or the center of gravity height. These values are for the assessment important if the vehicle is the current driving condition can maintain, for example, if it is in front of the vehicle Curve passes through. Alternatively, the current values for the weight and / or the length of the vehicle and / or the type of vehicle is not determined, but entered by the driver, for example, before driving, or are on storage media in smart vehicle keys previously stored.

In order for the motor vehicle to be able to drive safely and / or wear-optimized through a curve, ie to maintain the intended lane without too much stress on the tires due to, for example, occurring centrifugal forces, at least one limit condition for the driving condition in the route ahead of the motor vehicle is determined. This boundary condition For example, it may be a speed with which a consumption-optimized and / or wear-optimized and safe driving through of a curve in the course of the route is possible without overstressing the brakes and tires.

Around to give the driver an indication of his driving behavior, for example in terms of speed selection or acceleration behavior adapt to the section of road to be traveled by the motor vehicle, at least one route-dependent driving instruction is generated when the current driving state the at least one boundary condition not Fulfills. The driver is thus still before driving through the affected section asked to reduce the speed of gas removal or his motor vehicle with an engine brake or a retarder device decelerate to the current driving condition to the determined boundary condition adapt.

The at least one boundary condition can be derived from the known geometric ones Measured dimensions of the lying in front of the motor vehicle area become. For example, if in the area to be traveled through Curve lies, the at least one boundary condition can depend on Curve radius can be determined. In front of the vehicle Intersection, based on their geometry in the road guidance arrangement as such is detected, the boundary condition can be a reduced speed for the Approach the intersection.

The However, at least one boundary condition may also depend on the road condition. One Motor vehicle behaves For example, on wet, snowy or icy roads completely unlike on a dry road surface. For safety to increase, can the at least one boundary condition taking into account the Road condition of the lying in front of the motor vehicle area be determined to be traveled route.

A the vehicle dynamics variables, the can be used to determine the current driving state, is the current vehicle speed, which can easily be determined leaves. For the at least one limit condition can set a target speed for the consumption and / or wear-optimized and safe passage through the lying in front of the motor vehicle area be determined to be traveled route. Into the setpoint speed determination flow the available about information the lying in front of the motor vehicle route and in particular on the imminent driving distance and the road surface, optionally a center of gravity (for consideration a danger of tipping over the truck), weight and / or vehicle type. The actual Driving speed leaves easily compare with the target speed.

If the current driving speed is higher than the determined set speed is, a driving instruction is generated. For example, the driver receives then a driving instruction, when he's about to start, at increased speed For example, to go on a curve, resulting in a heavy tire wear or too a later one Time can lead to a strong deceleration, creating a strong Wear the Brake pads is caused. additionally may be in the presence of excessive speed a warning will be issued which prevents the vehicle from getting out the curve is worn.

The Driving instruction and / or the warning information can optically, be displayed acoustically or haptically. A visual display in the driver's field of vision gives the driving instructions to an attentive Driver out. additionally or alternatively, an audible indication of the driving instructions to the driver. By outputting haptic information, which about a "kick" on the pedals can be, the driver's attention can be increased even further.

The Driving instruction is the determined lying in front of the vehicle Area associated with the driving route to be traveled. If, for example cornering is imminent, then a driving instruction for consumption-related and / or wear-optimized Driving through the curve generated. This is the driver's example upon reaching a first predetermined location in the to be traveled Driving distance displayed a first driving instruction, which the driver requests the current driving speed by gas removal and / or by Activating a retarder device and / or an engine brake to reduce and to the determined target driving speed for the consumption and / or optimized wear Passing through approach the curve lying in front of the motor vehicle.

To Expiration of a predetermined period of time or upon reaching a second predetermined place in the driving route can be the Driver in addition a second driving instruction will be displayed. The second driving instruction prompts the driver to change the current speed by one slow braking to further reduce the current driving speed continue to approach the determined target driving speed.

Upon reaching a third predetermined location in the route to be traveled by the driver a third driving instruction is displayed, which urges the driver to reduce the current driving speed by another braking operation to the determined target driving speed.

alternative may instead of issuing driving instructions at the three predetermined Places also a speed profile can be specified. In both make Not only can the set speed be gradual, but also linear (stepless) changed become. The stages then only describe the warning mode.

By the described gradual and slow adaptation of the vehicle speed the for The target speed determined by the affected route area advantageously reduces the consumption of resources and component wear, whereby the efficiency of the vehicle operation is improved. In a first phase is to approach the corresponding track area by the use of the drag energy of the vehicle the fuel consumption reduced. Due to the slow deceleration of the vehicle will be in a second phase, the brake pads spared and the wear of the Brake pads reduced. By driving through the curve with the fuel consumption and / or wear-optimized Target speed, tire wear is reduced. Since the consumption and / or wear-optimized Target speed lower than the maximum possible speed for safe driving through the affected track area is or the same the maximum possible Speed is, by the application of the method according to the invention simultaneously a passage of the affected track area with a safe Speed allows.

Also according to the invention a device for providing route-dependent driving instructions indicated to the driver of a motor vehicle. This device includes an output device for the driving instructions and a with a memory device for Road courses connected electronic locating device, which tracks the course of the Motor vehicle to be driven route at least partially looking ahead and the current vehicle position, at least relatively determined to route course.

It is a sensor unit for detecting the current vehicle condition intended. Furthermore, an evaluation and control unit is provided, which from the current vehicle position relative to the course of the route considering at least the geometric stored in the memory device for road courses geometric Dimensions of lying in front of the motor vehicle area to be traveled At least one limit condition which determines a fuel consumption and / or wear-optimized and safe driving through the area allows. The evaluation and control unit compares the at least one boundary condition with the current one Driving condition and generates the driving distance dependent driving instructions, if the current driving state the at least one boundary condition not Fulfills.

With the device according to the invention Is it possible, the driver of a motor vehicle to issue driving instructions, with which an upcoming route consumption and / or wear-optimized and can be safely driven through.

In Embodiment of the device according to the invention For example, the sensor unit comprises means for detecting the current vehicle speed, the outside temperature, the weather conditions, the current vehicle weight and / or the road condition and / or the type of vehicle (e.g., semi-trailers, dump trucks, etc.) and / or the vehicle Gravity height or alternatively an intelligent vehicle key with a storage unit in the data on the type of vehicle, the vehicle dimensions, the center of gravity height and / or of the vehicle weight are stored. The recorded parameters are used by the evaluation and control unit to determine the at least evaluated a boundary condition. The evaluation and control unit determines, for example a desired speed, which is the consumption and / or wear-optimized Passing through the lying in front of the motor vehicle area to permitting driving route.

According to one Basic idea of the invention, the output device comprises a optical display device, which the driving instructions in the form representing pictographs. These route-dependent optical driving instructions can in the form of icons in a memory device be pre-stored, leaving a set of different glyphs is deposited, which specific driving instructions can be assigned.

In Another embodiment of the device according to the invention comprises Output device, an acoustic reproduction device, which the driving instruction in the form of speech signals, driving noises or the same acoustic signals, which in a memory device are stored. Through the voice playback are the instructions and information is passed directly to the driver without that he has to look at the display device.

In addition, the output device may include haptic signal generating means sen, which is coupled to at least one driver-operable vehicle control element, for example with an accelerator pedal. The haptic signals are transferable when issuing a driving instruction at least on the vehicle control element, for example as "kick movements" or movements on the accelerator pedal, preferably on the gas pedal.

With Help of an adjustable time switching element, which with the output device coupled, or dependent from road to turn can provide a release signal the optical, acoustic or haptic route-dependent driving instructions time-dependent output be similar the previously described predetermined locations, for example from a first predetermined location only an optical display, from a second predetermined place an optical and an acoustic or haptic Display and from a third predetermined location an optical, a acoustic and a haptic display. Thus, for example a temporal gradation between optical and / or acoustic and / or haptic display possible, around the driver different strong stimuli for recording and repositioning the offered instructions and information. Furthermore, it is possible set by the timer element the period in which displaying the driving instructions before entering the next Track area to be made.

Everything in everything possible the inventive method and the device according to the invention the driver, a lying in front of the vehicle route course Optimized for consumption and / or wear at the right speed and safe to drive through.

A advantageous embodiment The invention is illustrated in the drawings and will become apparent below described.

there demonstrate:

1 a schematic block diagram of an apparatus for providing route-dependent driving instructions, and

2 a schematic representation of a traversed route section.

How out 1 can be seen, comprises a device for providing route-dependent driving instructions to the driver of a motor vehicle 1 , an evaluation and control unit 10 , a sensor unit 20 for detecting a current driving condition, a locating unit 30 which is a storage device 34 for road courses and an electronic locating device 32 includes, and an output device 40 for the driving instructions.

The locating unit 30 determined ahead of at least partially the course of the motor vehicle 1 to drive through 100 and determines the current vehicle position at least relative to the route course 100 , The evaluation and control unit 10 determined from the current vehicle position taking into account at least the geometric dimensions of the front of the motor vehicle 1 lying area 200 the route to be traveled 100 at least one limit condition for the driving condition, which is a consumption and / or wear-optimized driving through the front of the motor vehicle 1 lying area 200 the route to be traveled 100 allows. In addition, the evaluation and control unit determines 10 the at least one boundary condition taking into account the road condition of the front of the motor vehicle 1 lying area 200 the route to be traveled 100 ,

The current from the sensor unit 20 detected driving condition of the motor vehicle 1 includes the current driving speed and optionally the current weight and / or the vehicle length and / or the vehicle type (eg semitrailer, dump truck, etc.) and / or the center of gravity height and the at least one boundary condition includes a target travel speed, which is the consumption and / or wear optimized Driving through the front of the vehicle 1 lying area 200 the route to be traveled 100 allows. The evaluation and control unit 10 compares the at least one limit condition with the current driving condition and generates the driving distance dependent driving instructions via the output unit 40 be output visually, acoustically and / or haptically, if the current driving condition does not meet the at least one boundary condition, ie if the current vehicle speed is higher than the determined target speed. Optionally, vehicle data relating to the vehicle weight and / or the vehicle length and / or the vehicle type and / or the center of gravity height instead of a detection by the sensor unit 20 also be entered by the driver or pre-stored in a smart key in a memory device.

The sensor unit 20 includes sensors 22 for detecting vehicle data, for example for detecting the actual speed of the vehicle, the current vehicle weight, etc., and sensors 24 for the detection of environmental data, for example for the detection of the outside temperature, the weather conditions, the condition of the roadway, etc. The information provided by the sensor unit 20 recorded data are from the evaluation and control unit 10 evaluated to determine the at least one boundary condition.

The output device 40 comprises an optical display device 50 representing the driving instruction in the form of icons stored in a memory device, and an audible reproduction device 60 which represents the driving instruction in the form of speech signals, driving sounds or the like acoustic signals. The various route-dependent acoustic signals are stored in a memory device and are, if necessary, from the display device 60 activated. In addition, the output device includes 40 a generating device 70 for haptic signals, which is coupled to at least one driver-operable vehicle control element. The haptic signals are transferable when issuing a driving instruction at least on the vehicle control element.

In the illustrated embodiment of the device according to the invention is an adjustable time switching element in the evaluation and control unit 10 integrated, which with the output device 40 connected to output a time-dependent enable signal to provide the optical, acoustic or haptic route dependent driving instructions.

2 shows a schematic representation of a traversed route section 100 with a curve 200 , The route section shown 100 is for example in the form of data points in the memory device 34 the locating unit 30 saved. The data points represented as squares 110 . 120 and 130 , which are interconnected by dashed lines represent a stored basic navigation record for the route shown section 100 , The data points shown as diamonds 210 . 220 . 230 . 240 additionally represent offline and / or online calculated data and information for the route section shown 100 and the associated curve 200 , In the data point 240 are, for example, additional information about the curve 200 , such as curve direction, road class, allowed maximum speed, curve radius, etc. stored.

The first data point 210 represents a first predetermined location 210 in the route to be traveled 100 in which the driver a first driving instruction is displayed when the current vehicle speed is higher than the determined target speed for the consumption and / or wear-optimized driving through the curve 200 is. The first driving instruction prompts the driver to reduce the current driving speed by removing the gas and / or by activating a retarder device and / or an engine brake, and to the determined desired driving speed for the consumption and / or wear-optimized driving through of the curve 200 to approach. The first data point 210 For example, the evaluation and control unit 10 calculated as a function of the current travel speed and of the setpoint speed to be set.

The second data point 220 represents a second predetermined location 220 in the route to be traveled 100 in which the driver a second driving instruction is displayed when the current driving speed is higher than the determined target speed for the consumption and / or wear-optimized driving through the curve 200 is. The second data point 220 may alternatively by the passage of a predetermined period of time after reaching the first predetermined location 210 be set in the driving route to be traveled. The second driving instruction prompts the driver to further reduce the current driving speed by means of a slow braking process in order to further approximate the current driving speed to the determined target driving speed. The second data point 220 is from the evaluation and control unit 10 For example, also calculated as a function of the current driving speed and the target speed to be set.

The third data point 230 represents a third predetermined location 20 in the route to be traveled 100 in which the driver a third driving instruction is displayed when the current vehicle speed is higher than the determined target speed for the consumption and / or wear-optimized driving through the curve 200 is. The third driving instruction prompts the driver to reduce the current driving speed to the determined target driving speed by means of a further braking operation. The third data point 230 is from the evaluation and control unit 10 For example, also calculated as a function of the current driving speed and the target speed to be set.

Instead, instead of issuing driving instructions at the three data points 210 to 230 It is also possible to use a speed profile, a function as a function of a "route to the curve" or a function as a function of the "time". Then the set speed can be changed not only stepwise but also linearly (steplessly). The stages then only describe the warning mode. For example, the signal disappears when a driver decelerates between two points below a speed threshold.

In an advantageous embodiment kön The first, third and fourth data points 210 . 230 . 240 be provided by a curve warning system. Such a curve warning system determines, for example, depending on the information in the data point 240 and from the current road surface a target speed, which is a safe driving through the curve 200 allows. At the first data point 210 For example, such a curve warning system outputs warning information which informs the driver about the preceding curve 200 informed. At the third data point 230 the curve warning system issues another message if the current vehicle speed exceeds the safe setpoint speed. The first and third data points calculated by the Curve Warning System 210 . 230 can be used by the device according to the invention or by the method according to the invention as a predetermined location for outputting the first and third driving instructions, so that the evaluation and control unit only the target driving speed for the consumption and / or wear-optimized driving through the curve 200 and the second data point 220 must determine.

The inventive method or the device according to the invention enable a gradual or even linear and slow adjustment of the vehicle speed to the for set speed determined for the affected section, whereby advantageously the resource consumption and the Component wear reduced and the economy of the vehicle operation is improved.

In the first phase is between the first and second data point to approach the corresponding track area by using the Sliding energy of the vehicle which reduces fuel consumption.

By the slow deceleration of the vehicle will be in the second phase spared the brake pads between the second and third data point and the wear of the Brake pads reduced.

By Driving through the curve with the consumption- and / or wear-optimized Target speed after the third data point becomes tire wear reduced.

There the consumption and / or wear-optimized setpoint speed lower than the maximum possible Speed for safe passage through the corresponding curve is, by the application of the method according to the invention simultaneously allows cornering with a safe cornering speed.

Claims (21)

Method for providing route-dependent driving instructions to the driver of a motor vehicle, wherein the course of the motor vehicle ( 1 ) to be traveled route ( 100 ) is determined at least in some areas in a forward-looking manner and at least relative to the current vehicle position, wherein the current driving state of the motor vehicle ( 1 ) and at least one limit condition for the driving condition is determined, characterized in that the determined at least one limit condition for the driving condition is a consumption and / or wear-optimized driving through of the front of the motor vehicle ( 1 ) area ( 200 ) of the route to be traveled ( 100 ), and at least one driving distance-dependent consumption and / or wear-relevant driving instruction is generated if the current driving state does not satisfy the at least one limit condition. A method according to claim 1, characterized in that the at least one boundary condition of known geometric dimensions of the front of the motor vehicle ( 1 ) area ( 200 ) is determined. A method according to claim 1 or 2, characterized in that the at least one boundary condition, taking into account the road condition of the front of the motor vehicle ( 1 ) area ( 200 ) of the route to be traveled ( 100 ) is determined. Method according to one of claims 1 to 3, characterized in that the current driving state of the motor vehicle ( 1 ) the current driving speed and optionally a current vehicle weight and / or a vehicle length and / or a vehicle type and / or a center of gravity height of the vehicle and the at least one boundary condition a target travel speed for the consumption and / or wear-optimized driving through the front of the motor vehicle ( 1 ) ( 200 ) of the route to be traveled ( 100 ), and the consumption and / or wear-relevant driving instruction is generated when the current driving speed is higher than the determined target speed. Method according to claim 4, characterized in that that vehicle data concerning the current vehicle weight and / or the vehicle length and / or the vehicle type and / or the center of gravity height of the vehicle by the Driver can be entered or in a storage device in one smart key are stored in advance. Method according to one of claims 1 to 5, characterized in that the consumption and / or wear-relevant driving instruction is visually, acoustically and / or haptically displayed to the driver. Method according to claim 4, 5 or 6, characterized in that when the driver reaches a first predetermined location ( 210 ) in the route to be traveled ( 100 ), a first driving instruction is displayed, which asks the driver to reduce the current driving speed by gas removal and / or by activating a retarder device and / or an engine brake to approximate the current vehicle speed to the determined target driving speed. A method according to claim 7, characterized in that after a predetermined period of time or when a second predetermined location ( 220 ) in the route to be traveled ( 100 ) a second driving instruction is displayed, which requests the driver to further reduce the current driving speed by a slow braking operation in order to further approximate the current driving speed to the determined target driving speed. A method according to claim 7 or 8, characterized in that the driver when reaching a third predetermined location ( 230 ) in the route to be traveled ( 100 ), a third driving instruction is displayed, which asks the driver to reduce the current driving speed by a further braking operation to the determined target driving speed. Method according to one of claims 4 to 6, characterized that a speed profile is output to the driver as a driving instruction. Method according to claim 10, characterized in that that the velocity profile is a function of dependence from a distance to the curve or a function depending from the time is. Method according to claim 10 or 11, characterized that the target speed be changed stepwise or linearly can. Method according to claim 12, characterized in that that the steps describe a warning mode and no more signal is issued when a driver between two levels below a speed limit value decelerating. Device for providing route-dependent driving instructions to the driver of a motor vehicle, having an output device ( 40 ) for the driving instruction, one with a memory device ( 34 ) electronic road-tracking device ( 32 ), which the course of the motor vehicle ( 1 ) to be traveled route ( 100 ) at least in certain regions and the current vehicle position at least relative to the route ( 100 ), a sensor unit ( 20 ) for detecting a current vehicle condition, and an evaluation and control unit ( 10 ), which from the current vehicle position relative to the route course ( 100 ) taking into account at least the geometric dimensions of the front of the motor vehicle ( 1 ) area ( 200 ) of the route to be traveled ( 100 ) determines at least one limit condition, characterized in that the determined at least one limit condition for the driving condition is a consumption and / or wear-optimized passage through the front of the motor vehicle ( 1 ) area ( 200 ) of the route to be traveled ( 100 ), whereby the evaluation and control unit ( 10 ) which compares at least one limit condition with the current driving condition and generates the route-dependent driving instructions and via the output unit ( 40 ) outputs when the current driving condition does not satisfy the at least one boundary condition. Apparatus according to claim 14, characterized in that the sensor unit ( 20 ) Medium ( 22 . 24 ) for detecting the actual speed of the vehicle, the outside temperature, the weather conditions, the current vehicle weight and / or the road condition, which of the evaluation and control unit ( 10 ) can be evaluated to determine the at least one boundary condition, wherein the evaluation and control unit ( 10 ) determines a target speed, which is the consumption and / or wear-optimized driving through the front of the motor vehicle ( 1 ) ( 200 ) of the route to be traveled ( 100 ). Apparatus according to claim 14 or 15, characterized in that the output device ( 40 ) an optical display device ( 50 ) representing the driving instruction in the form of icons stored in a memory device. Device according to one of claims 14 to 16, characterized in that the output device ( 40 ) an acoustic reproduction device ( 60 ) representing the driving instruction in the form of voice signals, driving sounds or the like of acoustic signals stored in a memory device. Device according to one of claims 14 to 17, characterized in that the output device ( 40 ) a generating device ( 70 ) for haptic signals, which is coupled to at least one driver-operable vehicle control element, wherein the haptic signals are transferable when issuing a driving instruction at least to the vehicle control element. Device according to one of claims 14 to 18, characterized by an adjustable time switching element, which with the output device ( 40 ) is connected to issue a time-dependent enable signal for providing the optical, acoustic or haptic route-dependent driving instructions. Device according to one of claims 14 to 19, thereby marked that the current driving state data concerning a current vehicle weight and / or a vehicle length and / or a vehicle type and / or a center of gravity height of the vehicle comprises and a Input device for inputting at least a part of the data the driver or a removable storage device on which at least a part of the data is stored, is formed. Device according to claim 20, characterized in that the removable storage device is an intelligent key.