DE102013007100A1 - Method for assisting rider during guiding of e.g. bus in traffic route network, involves determining and outputting recommendation for guiding motor vehicle to implement economical and safe driving styles in specific event - Google Patents

Abstract

The method involves providing data of a vehicle state of a motor vehicle, traffic conditions and an environment (101) and topological data of an infrastructure network. A first recommendation for guiding the vehicle is determined (102) to implement an economical driving style. A second recommendation for guiding the vehicle is determined (103) to implement a safe driving style. A third recommendation for guiding the vehicle is determined and output (104) to implement the economical and safe driving styles in an event that the first- and second recommendations contradict with each other. The data comprises information about current rains, snow, darkness and/or ice smoothness. An independent claim is also included for a driver assistance system.

Description

The invention relates to a method for assisting a driver in the guidance of a motor vehicle in a traffic route network, in which a recommendation for the guidance of the motor vehicle is determined and output for the driver. Furthermore, the invention relates to a driver assistance system and a motor vehicle with just such a driver assistance system.

Driver assistance systems are known in the prior art which determine and output recommendations for guiding the motor vehicle in order to stop the driver in an economical driving manner. Furthermore, in the prior art, a large number of driver assistance systems are known which determine and output recommendations for guiding the motor vehicle in order to stop the driver in a safe driving manner. Frequently, the recommendations of a driver assistance system, which is intended to achieve the most economical driving possible, with the recommendations of a driver assistance system, which is intended to achieve the safest driving possible, in opposite directions. For example, should a motor vehicle to implement a most economical driving as much as possible roll and slow down, which can lead to falling below a safe distance to a vehicle in front.

The object of the invention is to specify a method for assisting a driver in the guidance of a motor vehicle in a traffic route network as well as a corresponding driver assistance system in which recommendations for implementing a safe and economical driving style are determined and output.

The invention results from the features of the independent claims. Advantageous developments and refinements are the subject of the dependent claims.

The procedural aspect of the object is achieved with a method for assisting a driver in the guidance of a motor vehicle in a traffic route network, in which a recommendation for the guidance of the motor vehicle is determined and output for the driver. According to the invention, the method comprises the following steps: providing data on the vehicle condition of the motor vehicle, on a traffic situation surrounding the motor vehicle, and on topological data of the traffic route network, based on the provided data determining a first recommendation for guiding the motor vehicle, wherein the first recommendation is a based on the provided data determining a second recommendation for driving the motor vehicle, wherein the second recommendation implements a safe driving style, and in the case that contradict the first and the second recommendation, based on the data provided, the first and the second recommendation determining and issuing a third recommendation to run the motor vehicle, the third recommendation implementing an economical and safe driving. The term "first recommendation" and "second recommendation" does not necessarily imply an order, the two recommendations for safe and economical driving can also be determined in reverse order.

The method is therefore based on first determining a first and a second recommendation for the guidance of the motor vehicle on the basis of the data provided, wherein the first recommendation preferably implements a maximum of economical driving, and the second recommendation preferably implements a maximum of safe driving. Unless both recommendations are in conflict, d. H. are not contradictory or at least simultaneously implementable, these are preferably issued individually or in combination for the driver.

Only if the first and second recommendations contradict, d. H. that they are in reverse, or can not be implemented at the same time, a determination of a third recommendation on the basis of the data provided and the first and the second recommendation. In this third recommendation compromises are made, so that the third recommendation neither maximum economic driving nor maximum safe driving converts. In particular, for example, falls below a safety distance to a vehicle in front, or exceeded a maximum speed tolerated to allow an economical and safe guidance of the motor vehicle. The first, second and third recommendations are each determined based on an evaluation of the data provided, but the evaluation is based on different criteria (preferably: maximizing an economical driving style, maximizing a safe driving style, optimizing an economical and safe driving style).

The third recommendation is therefore based on an assessment of the current overall situation, ie. H. the current vehicle state (eg, speed, accelerator pedal position, brake pedal position, steering angles, acceleration, current vehicle weight, etc.), the current traffic situation surrounding the motor vehicle and surroundings, and topological data of the traffic route network (which preferably results, whether a forward section of a road Slope or a slope), with regard to the implementation of an economical and safe guidance of the motor vehicle.

Depending on the overall situation, a reduction of a safety distance determined as a second recommendation and / or an increase in a maximum speed can be determined and output as a third recommendation.

Preferably, the data provided include information on current rainfall, snowfall and / or ice slipperiness at the location of the motor vehicle. The third recommendation can therefore also take into account meteorological data.

Preferably, the provided data comprises a categorization of a preceding vehicle. Thus, for example, it can be distinguished whether the preceding vehicle is a truck, a bus, a car, a motorcycle, a bicycle or another road user. This information is used in the assessment of the overall situation in order to take the current traffic situation into consideration in more detail.

According to a preferred embodiment of the method according to the invention, the data provided are provided for the vehicle state of the motor vehicle and for a traffic situation surrounding the motor vehicle and surroundings of environmental sensors of the motor vehicle and / or by means of car-to-X communication. As environmental sensors are known, for example, radar sensors, ultrasonic sensors, camera / video sensors and / or laser sensors.

The output of the third recommendation but also the first or second recommendation is preferably optical, acoustic and / or haptic.

In a particularly preferred embodiment of the method, the third recommendation for controlling an automatic longitudinal and / or transverse control of the motor vehicle is used. Thus, for example, a Abstandstempomat implement the determined third recommendation for guiding the motor vehicle directly.

A further aspect of the object is achieved by a driver assistance system for assisting a driver in the guidance of a motor vehicle in a traffic route network, in which a recommendation for the guidance of the motor vehicle is determined and output for the driver. The driver assistance system according to the invention comprises a first means for providing data on the vehicle state of the motor vehicle, on a traffic situation and environment surrounding the motor vehicle, and on topological data of the traffic route network, a second means with which based on the provided data a first recommendation for guidance of the motor vehicle is determined, the first recommendation implements an economical driving, a third means, based on the provided data, a second recommendation for driving the motor vehicle is determined, the second recommendation implements a safe driving, and a fourth means, with in the event that the first and second recommendations conflict, a third recommendation for guiding the motor vehicle is determined and issued based on the provided data of the first and second recommendations, the third recommendation being an economical and secure F implemented.

Further preferred embodiments of the driver assistance system according to the invention result from analogous and analogous transmission of the above explanations to the method according to the invention.

Finally, the invention relates to a motor vehicle with a driver assistance system according to the invention. Preferably, the motor vehicle is a truck or bus.

Further advantages, features and details will become apparent from the following description in which - where appropriate, with reference to the drawings - at least one embodiment is described in detail. The same, similar and / or functionally identical parts are provided with the same reference numerals.

Show it:

1 a schematic sequence of a method according to the invention, and

2 a schematic structure of a driver assistance system according to the invention.

1 shows a schematic flow of a method according to the invention for assisting a driver in the management of a motor vehicle in a traffic route network, in which a recommendation for the guidance of the motor vehicle is determined and output for the driver. The method comprises the following steps. In a first step 101 provision is made of data on the vehicle state of the motor vehicle, on a traffic situation and environment surrounding the motor vehicle, and on topological data of the traffic route network. In a second step 102 Based on the provided data, a determination of a first recommendation for the guidance of the motor vehicle takes place, wherein the first recommendation implements an economical driving style. In a third step 103 Based on the provided data, a determination of a second recommendation for the guidance of the motor vehicle takes place, whereby the second recommendation implements a safe driving style. In a third step 104 takes place in the event that the First and second recommendations contradict, based on the provided data of the first and second recommendations, determining and issuing a third recommendation for guiding the motor vehicle, the third recommendation implementing an economical and safe driving style.

The third recommendations are based on an assessment of the current traffic situation, as shown by the data provided. The evaluation does not follow the maximization of an economical driving style (first recommendation) and not the maximization of a safe driving style (second recommendation) but a compromise, which is determined depending on the current traffic situation. The following examples indicate such assessments of specific traffic situations to determine a third recommendation.

If the driver lets the vehicle roll (economically), a short-time low immersion in the safety distance to the vehicle in front is positively evaluated depending on the overall situation.

If the driver lets the vehicle roll (economically), a brief, small immersion in the safety distance to the car in front is not rated negatively.

The immersion in the safety distance is evaluated depending on the condition of the drive train (no injection) and the topographical situation positive, for example, the driver of a heavy truck in a sink or in the counter-rise relatively close to the front man to roll the momentum optimally in the To be able to take a rise. On a level track, however, he may only dive lower in the safety distance, even if the vehicle is rolling. If the gradient is even longer, the immersion in the safety distance is not rated as positive, because with a larger distance the own vehicle can roll out better in the next depression.

On a counter-rise after a dip, a short-term immersion of a truck in the safety distance (momentum use) on highways may be more likely to be accepted if the vehicle in front is a passenger car and if there is a driveway in the area below the underflow. Then it can be assumed that the car will soon accelerate and the gap grows quickly again. If the front vehicle is a truck, it can be assumed that the engine power is not sufficient to accelerate the increase, d. H. a dip in the safety distance is rated rather negatively.

Vehicle typing can be done using a radar sensor, a camera, or vehicle-vehicle communication.

Falling below the safety margin on motorways is rather not rated negatively if the vehicle has just been overtaken (Einscherer). Then it can be assumed that the front vehicle has a higher ground speed and the distance will grow soon. Otherwise, the driver would have to actively slow down, which would not be economical. The shearing can be done from the left (overtaking) or right (entrance). After a Einschervorgang and a greater distance to the front Einscherenden an adjustment of the speed of the motor vehicle is performed relative to the vehicle in front, while a temporary underrun of a safety distance is allowed to the preceding vehicle.

Adequate types of speed adaptation are, for example, on gradients a moderate braking intervention (especially with retarders such as retarder) and on flat or rising terrain the gas take away.

When taxiing to an intersection, a brief drop below the safety distance to a preceding vehicle is accepted within the framework of the third recommendation, since a most economical driving style is present when intersections are possible without stopping.

When rolling a slight exceeding of the maximum speed is accepted (flywheel), if this is achieved without fuel consumption. However, if the maximum permitted speed is exceeded with fuel consumption, this will not be accepted.

If the vehicle rolls onto a green traffic light that suddenly turns red, the driver may have to brake hard. In this case, however, this is not rated negative (no aggressive driving style), since the approach was economical. The same driving style z. B. at a traffic jam end, however, would be rated negative, since fuel savings can be achieved only by a long, continuous coasting, but not by fast starting and hard braking.

A kickdown is rated negative (being uneconomical and aggressive). However, if this KickDown occurs at a highway entrance, it is desired and safe (fast threading into the flowing traffic), so that a negative rating is suppressed. The same applies when starting off at an intersection or changing from red to green traffic light.

Flywheel use is assessed negatively if this leads to increased risks for other road users, eg. For example, inner city grade where actual speeding is expected to occur, but due to the digital road map, it is known that the vehicle is traveling in a city with narrow streets, pedestrians, cyclists, etc., so the maximum speed limit would be too dangerous. The same applies to swing use in the downhill on narrow roads or with many curves or in bad weather (darkness, temperature, rain sensor).

Overtaking may be useful if the vehicle in front is traveling much slower. An initiated overtaking process can be detected and checked by radar, video or other sensors, it can also be determined whether the own motor vehicle is much faster. If this is the case, the overtaking process is evaluated positively. Since the fastest possible overtaking to increase traffic quality and safety is desirable, the fastest possible driving in this phase is not rated negative. If the relative speed to the vehicle in front is too low, a negative rating is carried out.

If heavy rain, snow or black ice is detected, it is considered positive if only the service brakes are used instead of the sustained brake, since this is safer under the given circumstances (all wheels are braked instead of only the drive axle).

2 shows a schematic structure of a driver assistance system according to the invention for assisting a driver in the leadership of a motor vehicle in a traffic route network, in which a recommendation for guiding the motor vehicle is determined and output for the driver. The driver assistance system comprises a first means 201 in which data on the vehicle condition of the motor vehicle, on a traffic situation and environment surrounding the motor vehicle, and on topological data of the traffic route network are provided, a second means 202 in which, on the basis of the data provided, a first recommendation for the guidance of the motor vehicle is determined, wherein the first recommendation implements an economic driving style, a third means 203 in which, based on the data provided, a second recommendation for the guidance of the motor vehicle is determined, the second recommendation implementing a safe driving style, and a fourth means 204 in which, in the event that the first and second recommendations conflict, based on the provided data of the first and second recommendations, a third recommendation for driving the motor vehicle is determined and issued, the third recommendation implementing an economical and safe driving style.

Although the invention has been further illustrated and explained in detail by way of preferred embodiments, the invention is not limited by the disclosed examples, and other variations can be derived therefrom by those skilled in the art without departing from the scope of the invention. It is therefore clear that a multitude of possible variations exists. It is also to be understood that exemplified embodiments are really only examples that are not to be construed in any way as limiting the scope, applicability, or configuration of the invention. Rather, the foregoing description and description of the figures enable one skilled in the art to practice the exemplary embodiments, and those skilled in the art, having the benefit of the disclosed inventive concept, can make various changes, for example, to the function or arrangement of individual elements recited in an exemplary embodiment, without Protected area, which is defined by the claims and their legal equivalents, such as further explanation in the description.

LIST OF REFERENCE NUMBERS

101-104

steps

201

first means

202

second means

203

third means

204

fourth means

Claims (10)

A method for assisting a driver in driving a motor vehicle in a traffic route network, wherein a recommendation for guiding the motor vehicle is determined and output for the driver, comprising the following steps: - providing ( 101 ) of data relating to the vehicle condition of the motor vehicle, to a traffic situation and environment surrounding the motor vehicle, and to topological data of the traffic route network, based on the data provided ( 102 ) a first recommendation for the guidance of the motor vehicle, wherein the first recommendation implements an economic driving style, - based on the provided data determine ( 103 ) a second recommendation for the management of the motor vehicle, the second recommendation implementing a safe driving style, and - in the event that the first and second recommendations conflict, based on the data provided, the first and second recommendations, determination and output ( 104 ) a third recommendation for the guidance of the motor vehicle, the third recommendation implementing an economical and safe driving style. Method according to Claim 1, in which a reduction of a safety distance determined as the second recommendation is determined and output as the third recommendation. Method according to Claim 1 or 2, in which, as the third recommendation, an exceeding of a maximum speed determined as a second recommendation is determined and output. Method according to one of claims 1 to 3, wherein the data provided include information on current rainfall, snowfall, darkness and / or ice slipperiness. Method according to one of Claims 1 to 4, in which the data provided about the vehicle state of the motor vehicle and about a traffic situation and environment surrounding the motor vehicle are provided by environmental sensors of the motor vehicle and / or by means of car-to-X communication. Method according to one of claims 1 to 5, wherein the output of the third recommendation is optical, acoustic and / or haptic. Method according to one of claims 1 to 6, wherein the provided data include a categorization of a preceding vehicle. Method according to one of claims 1 to 7, wherein the third recommendation for controlling an automatic longitudinal and / or transverse control of the motor vehicle is used. A driver assistance system for assisting a driver in driving a motor vehicle in a traffic route network, in which a recommendation for guiding the motor vehicle is determined and output for the driver, and which is designed and set up to carry out a method according to one of claims 1 to 8, comprising: - a first means ( 201 ), with which data are provided on the vehicle condition of the motor vehicle, on a traffic situation and environment surrounding the motor vehicle, and on topological data of the traffic route network, - a second means ( 202 ) which, based on the data provided, determines a first recommendation for the management of the motor vehicle, the first recommendation implementing an economic driving style, - a third means ( 203 ) which, based on the data provided, determines a second recommendation to operate the motor vehicle, the second recommendation implements a safe driving style, and - a fourth means ( 204 ), which, in the event that contradict the first and the second recommendation, based on the provided data, the first and the second recommendation, a third recommendation for driving the motor vehicle is determined and issued, the third recommendation is an economical and safe driving implements. Motor vehicle with a driver assistance system according to claim 9.

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