CN100559211C - Method for increasing driving safety and/or comfort of a motor vehicle - Google Patents

Abstract

The present invention relates to a kind of be used to the improve driving safety of motor vehicle and/or the method for comfortableness, wherein, a) by controller of vehicle or one group of relevant control device generation data of being provided for improving security functions, and these data logically combine with the data or the cartographic data of navigational system, wherein navigational system comprises cartographic data, b) described cartographic data with by the sensor on the vehicle directly or indirectly detected information one about the current driving condition be used from and determine current dangerous values, and, carry out having the intervention of the function group that improves the security task c) according to described dangerous values.Especially, except or substitute described intervention, produce the warning of vision, the sense of hearing or sense of touch, with alerting driver.Navigational system is used the cartographic data material, wherein, from map server and/or external line handling device wirelessly the navigation system current cartographic data is provided, and navigational system has been integrated in the housing of motor vehicle braking systems.

Description

Method for increasing driving safety and/or comfort of a motor vehicle

technical field

The present invention relates to a method for improving the driving safety and/or comfort of a motor vehicle, a method combined with the above method to determine the uphill or downhill of the road through the data in the motor vehicle detected by the sensor A method of eigenvalues, and an electronic brake control and/or driving dynamics control.

Background technique

Navigation systems for motor vehicles are known which not only serve navigation purposes but also provide traffic information. Traffic information may include, for example, traffic signs or possible features of roads stored in the cartographic (mapping) data of the navigation system. In practice, roads may also be affected or predetermined due to seasonal changes (eg road closures in winter) or due to current weather conditions (ice, snow, etc.).

DE 197 41 033 A1 discloses the use of traffic information in the motor vehicle to warn the driver when the motor vehicle exceeds a predetermined speed, generating an audible or visual message for the driver in the motor vehicle.

DE 44 11 125 C2 discloses the use of wireless traffic sign information via transponders integrated in traffic signs, which can be used to influence the travel speed of motor vehicles, in particular trucks. DE 102 48 968 A1 describes a very similar system. In this system, traffic signs equipped with transponders also transmit traffic information to the motor vehicle and, depending on (the content of) the traffic information, either display the traffic information or simply (e.g. via a cruise control system) limit or affect driving speed.

Contents of the invention

Objects of the invention include improving driving safety and/or comfort by using the latest navigation system technology.

According to the invention, this object is achieved by a method for increasing the driving safety and/or comfort of a motor vehicle, which method comprises: a) controlling a vehicle control device or a group of related The data controlled by the control device are logically combined with the data of the navigation system or the cartographic data, wherein the navigation system includes the cartographic data, b) combining said cartographic data with the information about the current driving conditions detected directly or indirectly by the sensors on the vehicle The information is used together to determine the current risk value, and c) according to said risk value, an intervention is carried out on the functional group with the task of increasing safety, characterized in that the navigation system uses cartographic data material, wherein from the map server and/or Or an external circuit processor wirelessly supplies the current map data to the navigation system, which is already integrated in the housing of the motor vehicle braking system.

The invention relates to the idea of utilizing information from a navigation system in a vehicle control device with the task of increasing safety, in particular in a control device of an electronic braking system of a motor vehicle, as well as already existing information or correspondingly stored permanently or dynamically changed Cartographic data to judge the current dangerous situation. These data and additional, possibly existing vehicle data are used to determine the current risk value, which indicates the degree to which the driver or passengers are at the current local moment in danger. The risk value depends, for example, on the following factors: vehicle speed, road friction coefficient, outside temperature, driving on bridges or in tunnels, driving around curves, driving uphill or downhill, presence of controlled braking, etc.

Preferably, an intervention in a brake control (eg ABS control) and/or driving dynamics control (eg ESP control) is carried out depending on the determined risk value.

Said intervention may preferably be achieved by performing one or more of the following measures:

- preparation of the braking system or the driving dynamics control in order to make the braking mechanism more responsive, (e.g. by pre-filling the brake wheel cylinders),

- Independent brake intervention to slow the vehicle when the driver is not braking (e.g. ACC intervention), or,

- Prepare the chassis or other vehicle components for imminent braking (e.g. by intervention in the active chassis).

The two first-mentioned measures can be carried out in a particularly simple manner in a brake control system with ESP function, since there are generally provided in the brake control system for establishing pressure hydraulic pump.

Furthermore, preferably, in addition to or instead of the intervention or preparatory measures, a warning is issued to the driver, in particular via a display element in the driver's area and/or by changing the response behavior (pedal feel) of the accelerator pedal.

Furthermore, preferably, the aforementioned measures are initiated upon detection of a violation of traffic regulations or in an emergency situation.

It is also preferred that the preparatory measures include carrying out a prefilling of at least one existing brake wheel cylinder.

Furthermore, preferably, the preparatory measures are carried out in an antilock braking system (ABS) and/or a device for driving dynamics control (ESP) and/or a collision avoidance control (Abstandsregelung, ACC) device.

The navigation system is preferably of the type that can be continuously updated. In particular, the coordinates of traffic warning transmitters (signs, bridges, turns, etc.) are stored as data in the navigation system, or this type of data can come from the hazard itself, e. That is, obtained from the cartographic data material.

Finally, it is preferred that the traffic information transmitter stored in the form of data is used with transponder technology known per se together with the transmission of the traffic information transmitter.

The warning to the driver can preferably be realized by means of visual, audible or tactile signals, and in the case of visual warnings it can be provided by indications such as lights or displays.

Furthermore, it is preferred that the traffic information is linked in a suitable manner with the information of the navigation system. When using a navigation system, ie when there is a data connection between the control device and the navigation system, it is particularly advantageous to be able to regularly provide the navigation system with current data, for example by manual or automatic updating. More preferably a navigation system using cartographic data is used. Alternatively, it is possible and therefore also preferred that the navigation system is already integrated in the housing of the motor vehicle brake system. However, since only the availability of cartographic data is necessary for this (navigation) function, it is also expedient to arrange a data receiver at the location of the navigation system, which receiver is always supplied with current cartographic data wirelessly . This can be done, for example, via a publicly accessible map server or an external line computer/processor.

The intervention of the functional group with the task of increasing safety may preferably include, for example, the preparation of the existing electronic brake system for the imminent braking operation by activating the hydraulic pump, which leads to the brake wheel pre-fill the brake line of the brake cylinder or the brake wheel cylinder. In this case, the braking distance is generally shortened due to the reduced reaction time of the braking system.

It is also preferred to carry out an effective braking intervention as an intervention, in particular with a predetermined deceleration, and/or to adjust the response threshold of the auxiliary braking system to a higher braking readiness.

Another preferred intervention may include adjusting the response threshold of the auxiliary braking system in an emergency to achieve a more intensive response characteristic.

Further preferred interventions may include, in emergency situations, the braking system enabling active braking independently of the driver; eg, ACC braking operation, which in particular performs a deceleration of the car of approximately 0.3g.

A further preferred intervention may consist in adapting the parameters of the electronically adjusted chassis or the control parameters of the actively controlled chassis to the hazardous situation detected in the aforementioned manner.

Another preferred intervention may include, in particular in the case of the accelerator pedal being a force feedback pedal, that the pedal is adjusted to be harder to press in an emergency situation so that the driver is warned. Influencing the accelerator pedal as an accelerator pedal is particularly suitable since the driver usually rests his foot on this pedal and the driver is warned at a relatively early stage by influencing the behavior of the accelerator pedal.

Interventions or warnings are performed, for example, when the speed exceeds that permitted by the current point in time and the current vehicle position, approaching an intersection where the current driving direction does not have priority, or other driving maneuvers that violate traffic regulations (driving in the opposite direction on a one-way street). or on a road that is prohibited), road sections that are prone to hazards due to weather conditions (bridges covered with ice, snowstorm warnings, etc.), or fast approaching narrow turns.

Preferably, the control device carrying out the above-mentioned method compares the traffic information with the current driving state information obtained by the vehicle sensors, and obtains therefrom additional information on the necessity of intervention or warning. The information obtained by the sensors relates to, for example, driving speed, yaw rate, outside temperature and distance signals to other vehicles or obstacles.

The invention also relates to a method for determining characteristic values of road upslopes and/or road downslopes from data detected by sensors in a motor vehicle, in particular in combination with the aforementioned method, wherein cartographic information of a navigation system is used Improved determination of road uphill or road downhill.

Finally, the invention also relates to an electronic braking device and/or a driving dynamics control device, which is characterized in that the aforementioned method is carried out in these devices.

Description of drawings

Other preferred embodiments can be seen in the following claims and in the following description of embodiments with reference to the figures.

The present invention will be explained in more detail below by way of examples.

In the attached picture:

Figure 1 is a schematic diagram of a passenger car in road traffic.

Detailed ways

The vehicle 5 is traveling on the road 6 in the direction of the arrow 7 towards the bridge 1 . Bridges represent a potential hazard in winter, since ice 2 is very likely to appear on the road surface in the corresponding weather. The navigation system 7 transmits information about the approach to the bridge 1 to the braking system 4 via an interface. Alternatively, corresponding cartographic information can also be requested wirelessly from the map server 8 via the radio link provided by the antennas 3 and 3'. Additional sensor information, for example data from wheel speed sensors 9 , is evaluated in brake system 4 . The instantaneous vehicle speed or possible cornering maneuvers can also be obtained from the wheel speed sensor data. Also, check that control functions such as ABS or ESP are operating. This driving dynamics information is then combined with cartographic information about the location of the bridge and an estimate of the likelihood of a higher imminent hazard is made.

Based on the determination of the likelihood of danger, the brake control device 4 can prepare the vehicle and the driver for an imminently dangerous situation, wherein a display appears on the control panel, while the brake system is pre-filled and the passive safety system is additionally activated , the safety system first ensures that the seat belt is tensioned.

Claims (17)

1. A method for improving driving safety and/or comfort of a motor vehicle, wherein: a) logically combining data controlling a vehicle control device or a group of related control devices performing a safety-enhancing task with data from a navigation system or cartographic data, where the navigation system includes the cartographic data, b) using said mapping data together with information about current driving conditions detected directly or indirectly by sensors on the vehicle for determining a current risk value, and c) on the basis of said risk value, an intervention is carried out in a functional group with a safety-enhancing task, characterized in that The navigation system uses cartographic data material, the current cartographic data being supplied to the navigation system wirelessly from a map server and/or an external line processor, and the navigation system is already integrated in the housing of the motor vehicle braking system. 2. The method according to claim 1, wherein said group of related control devices is: - brake control and/or driving dynamics control, - control devices for restraint systems, - controls for the electronic steering system, - chassis controls, - engine controls, or -Controls for the comfort functions. 3. The method according to claim 1, characterized in that, in addition to or instead of the intervention, a visual, audible or tactile warning is generated for the driver. 4. The method according to claim 1, characterized in that said intervention in the functional group with the task of increasing safety comprises performing one or more of the following measures: - preparation of the braking system or driving dynamics control for a more responsive braking mechanism, - Independent brake intervention to slow the vehicle without the driver braking, or - Prepare the chassis or other vehicle components for imminent braking. 5. A method according to any one of claims 1-4, characterized in that the type of information determined by the sensor is correlated with the cartographic data. 6. The method as claimed in claim 1, characterized in that the specification of the direction of the distance sensor is correlated with the cartographic data. 7. A method according to any one of claims 1-4, characterized in that parameters for an electronic braking system or a driving dynamics control system are correlated with the mapping data. 8. A method according to any one of claims 1-4, characterized in that the navigation system or other data processing system related to cartographic data is regularly updated wirelessly or manually and/or can be wirelessly or manually The mode is updated with stored current information on the degree of road hazard. 9 . The method as claimed in claim 1 , characterized in that, for determining the current risk value, traffic information from a traffic warning transmitter transmitted wirelessly based on transponder technology is used. 10 . 10 . The method as claimed in claim 1 , characterized in that the driver is warned by a display element in the driver's area or by changing the response characteristic of the accelerator pedal. 11 . 11. A method according to any one of claims 1-4, characterized in that said intervention comprises reducing the idle travel of the braking system, in the case of hydraulic braking systems, the The reduction is achieved by prefilling one or more wheel brake cylinders. 12 . The method according to claim 1 , wherein the intervention is carried out in an antilock braking system and/or a device for driving dynamics control and/or a collision avoidance control device. 13 . 13. The method according to any one of claims 1-4, characterized in that, starting from a defined risk value, the vehicle sends out a wireless message. 14. The method of claim 13, wherein the wireless message is an emergency call. 15. A method for determining the characteristic value of road uphill or road downhill through the data in the motor vehicle detected by the sensor combined with the method according to any one of the preceding claims, characterized in that the navigation system The cartographic information of is used to prepare the vehicle for the topological properties of the road. 16. The method according to claim 15, wherein the topological characteristics of the road refer to turning, uphill and downhill. 17. An electronic brake control device and/or a driving dynamics control device, characterized in that the method according to one of the preceding claims is carried out in these devices.

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