DE102009004102A1 - Method for controlling speed of motor vehicle, particularly electric vehicle or hybrid vehicle, involves recording information regarding traffic or driving situation in continuous journey of motor vehicle - Google Patents

Abstract

The method involves recording information regarding traffic or driving situation in a continuous journey of a motor vehicle (S1). A target size is determined (S2) regarding a maximum energy supply to a drive of the motor vehicle to continue journey taking into account the recorded information. A target acceleration predetermined by a driver of the motor vehicle is recorded (S3) and an actual acceleration is determined (S4) taking into account the determined target size and the predetermined target acceleration. The motor vehicle is accelerated (S5) with the actual acceleration. An independent claim is also included for a speed-control system for a motor vehicle.

Description

The The invention relates to a method for controlling a speed of a vehicle. Furthermore, the invention relates to a speed control system for a vehicle.

Out The prior art discloses methods and systems for increasing a driving safety and improving a ride comfort known. Some these systems are designed as driver assistance systems to a speed and / or direction of travel of a vehicle to control automatically and so a driver during one Ride workload relieve.

Indeed Many drivers are not only interested in driving safety and a comfortable driving, but also at a reduction interested in an energy consumption. Especially with regard to The high energy prices, it is beneficial if an unnecessary Fuel consumption of an internal combustion engine and / or not necessary power consumption of an electric drive when driving to avoid a vehicle. In addition, a heavy duty one for the power supply of the electric drive used to wear out the battery Accelerate battery.

The DE 10 2006 000 397 A1 describes a powertrain life prediction device and a powertrain battery life warning device in which a data processing unit records data relevant to battery degradation, such as battery data, energy consumption data, and vehicle travel data. Subsequently, based on the recorded data, a residual life of the battery is calculated. About a display device, the driver can be informed about the remaining life of the battery. The in the DE 10 2006 000 397 A1 However, the devices described can not help to reduce the costs associated with unnecessary energy consumption or extend the life of the battery.

The The invention provides a method for controlling a speed of a vehicle having the features of claim 1 and a speed control system for a vehicle with the features of claim 8.

The The present invention is based on the recognition that an unnecessary high energy consumption in the onward journey of the vehicle preventable is by considering the information regarding the traffic and / or driving situation the value range of the executable Accelerations and / or the power supplied to the drive is restricted. This is done by setting the default size. The target acceleration and the actual acceleration can be positive and negative accelerations be.

by virtue of the specified default size with respect to the maximum energy input becomes an unnecessary acceleration / deceleration of the vehicle avoided. One can also do this as avoiding an "aggressive Driving style ". This can be too high Energy consumption, which is an unnecessarily strong acceleration and a frequent deceleration of the vehicle due would be avoided when continuing the vehicle. Of the technical advantage of the present invention thus comprises a Significant reduction in fuel consumption when driving on. additionally is by preventing an "aggressive driving style" the Driving safety increased.

The Prevent unnecessary acceleration / deceleration By means of the present invention, in a manner which the driver in the steps carried out by him, like pressing an input element for a Acceleration / deceleration of the vehicle, not significantly impaired. The driver is therefore not distracted. additionally allows the present invention for the driver driving without frequent braking of the vehicle. The Invention thus improves ride comfort for the driver.

Of Further, the present invention offers in comparison with a Driver assistance system has the added advantage that the Driver always actively intervene in the speed of his vehicle and the vehicle can accelerate or decelerate.

advantageous Refinements and developments of the invention will become apparent the dependent claims.

In An advantageous embodiment is in the acceleration the vehicle with the actual acceleration over the default size fixed maximum energy supply maintained. This is feasible by setting the actual acceleration to be one in terms of maximum energy input smaller energy input equivalent. In this way is a reduction of energy consumption the vehicle easily executable.

In a further advantageous embodiment, a position and / or movement information of at least one other road user and / or a signal of at least one traffic control component is determined as at least part of the information relating to the traffic and / or driving situation in the onward journey and for setting the Vor evaluated with respect to the maximum energy input. The position and / or movement information may be a position, a speed, a speed change, a movement direction and / or a movement direction change of the at least one further road user. The signal of the at least one traffic control component may be an optical signal, such as a color of a traffic light and / or a road surface of a traffic sign, and / or an acoustic signal, such as a siren. The position and / or movement information and / or the signal of the at least one traffic control component can be determined in a simple and reliable manner by means of a sensor device. The sensor device can additionally be used for a warning system, a safety system and / or a driver assistance system. The method can thus be implemented using a system already used on the vehicle. This reduces the cost of performing the procedure.

For example sets a distance to set the default size determined to a preceding vehicle. Instead of the distance can also be a relative speed, a relative speed change, a relative movement direction and / or a relative movement direction change to Set the default size to be evaluated. The default size, which for comparison with the can be used by the driver predetermined target acceleration can an advantageous in terms of the distance speed and / or Be acceleration of the vehicle. Is the target acceleration greater as the default size, so becomes an actual acceleration which is smaller than the target acceleration. On This way, an unnecessarily high acceleration of the ve hicle, which with a high probability within a short time again must be braked, avoided.

When Alternative or as a supplement to this can be a driving style the driver of the vehicle as at least part of the information regarding the traffic and / or driving situation determined and set the default size with respect to the maximum power input be evaluated. For example, by frequency accelerating and / or decelerating the vehicle an already traveled distance determined whether the Driver to a quiet driving style or to an aggressive driving style inclines.

Of Further, road information may be provided by a data output device for at least one road used in the onward journey as at least part of the information regarding the traffic and / or Driving situation when continuing to receive and to set the Default size with respect to the maximum Energy supply are evaluated. The data output device is For example, an electrical map and / or a navigation system. This is an advantageous multi-functionality of the data output device guaranteed.

The Benefits described in the paragraphs above are also in a corresponding method for operating a vehicle with an electric drive and a battery, to which the electric Drive is coupled so that a power supply of the electric Drive over the battery, guaranteed. The driver of the vehicle has in terms of a lifetime of Battery an additional interest in an energy-saving driving style, since a wear of the battery in case of frequent over-discharging and / or sub-discharging is accelerated. A driving style with a reduced energy consumption, which over the use of the described here Method is possible, however, extends one Battery life. Thus, the application of the method in a vehicle with a battery to power the electrical Drive particularly advantageous. For example, the high costs associated with replacing the battery are to be saved.

In a development of the method can be used as default size Regarding the maximum energy supply a state of charge of Battery set and adjusted to the battery. On This way it is guaranteed that the battery is at a Traffic and / or driving situation, in which a strongly accelerated Vehicle after a short time must be braked again, spared becomes.

For example is when driving through a residential area and / or while driving by a flat terrain the charge state of the battery set so that a maximum energy draw between 10% up 15% is possible. Thus, in such a traffic and / or driving situation an unnecessary load on the battery be avoided. On the other hand, when driving uphill and / or on a highway, the energy extraction to a maximum value between 20% to 30% are determined by the state of charge of the battery.

The already described advantages of the method are also in a corresponding speed control system guaranteed.

In particular, it is advantageous if a vehicle with an electric drive and a battery to which the electric drive is coupled so that a power supply of the electric drive via the battery is also equipped with such a speed control system is because the onset of the speed control system, the life of the battery is extendable.

The Vehicle may be an electric vehicle or a hybrid vehicle. In a hybrid vehicle may additionally energy consumption the internal combustion engine via an onset of the speed control system be reduced.

The Invention will be described below with reference to the schematic figures specified embodiments explained in more detail. Show it:

1 a flowchart for illustrating an embodiment of the method for controlling a speed of a vehicle;

2 a schematic representation of a vehicle with a first embodiment of the speed control system; and

3 a schematic representation of a vehicle with a second embodiment of the speed control system.

1 FIG. 12 is a flow chart illustrating one embodiment of the method for controlling a speed of a vehicle. FIG.

In a step S1 of the method is information regarding a traffic and / or driving situation in a continuation of the Vehicle recorded. Under an information regarding the Traffic situation is for example a position and / or movement information at least one further road user and / or a signal at least one traffic control component to understand. The capture the position and / or movement information of the at least one another road user and / or the signal of at least a traffic control component is preferably via a sensor device.

Examples for a detectable in this way position and / or Movement information of at least one other road user are a position, a speed, a speed change, a direction of movement and / or a movement direction change of at least one other road user. It can also a relative position, a relative speed and / or a Relativbewegungsrichtung of at least one other road user be recorded.

The Signal of the at least one traffic control component is, for example an optical signal, such as a current color a traffic light and / or a Shield surface of a road sign. The one described here However, the method is not limited to optical signals. Likewise, an acoustic signal, for example, a detected Martinshorn, detected by means of a suitably trained sensor device become.

One low cost embodiment for a usable sensor device includes, for example, a camera with associated image evaluation electronics, an ultrasonic sensor and / or a noise detector.

The Sensor device may be a subunit of an on-board warning system, an on-board safety system and / or an on-board safety system Be navigation system. Likewise, the sensor device for an interaction with an on-board warning system, an in-vehicle warning system Security system and / or an in-vehicle navigation system be educated. This way is a multifunctionality the sensor device ensures. This reduces the am Vehicle installed components and lowers the cost to run of the method described here.

A Information regarding a driving situation when driving on of the vehicle can be a driving behavior of a driver of the vehicle and / or Road information for at least one at be on the road driving further.

To the Detecting the driving behavior of the driver can be a frequency and / or a speed difference of desired accelerations, which from the driver via an input to an input element predetermined for delays or accelerations of the vehicle will be determined. Recording the frequency and / or the speed difference can via a the at least one input element for delays or Accelerators arranged sensor device and / or over a central vehicle control system.

Becomes thereby, for example, found that the driver after accelerating of the vehicle, such as by operating an accelerator pedal braking within a comparatively short time interval the vehicle causes, for. B. by pressing a brake pedal, thus, the driver may experience a drivability with an unnecessary be associated with high energy consumption. Likewise, it can be determined that after a strong acceleration the vehicle again strong is slowed down and then the driver a driving behavior with a unnecessarily high energy consumption can be assigned. Otherwise can give the driver a driving experience with an energy consumption, which hardly inflated, can be assigned.

The Road information of at least one in the onward journey For example, if the road is covered, it includes a slope, a road condition, a number of lanes, one Road type, a speed limit and / or a Traffic density. The road type can be a highway, a Highways, a freeway, a road in an industrial area and / or a street in a residential area be. A speed limit includes z. B. an intersection, a priority sign, a speed limit sign and / or a traffic light, which is located on the street.

The Road information may be from a data output device be queried. This can be done by the driver in front of you Beginning and / or during a journey a starting position, a destination position and / or a route into the data output device enters. A suitable data output device is, for example an electrical map or a navigation system. The to determine the road information used data output device can thus also for other functions, for example for determining an optimal route or for determining a Position of the vehicle to be used. Due to the multifunctionality the data output device used is that described here Method cost effective executable.

Instead of an on-board data output device can also be a central Data output system are queried by radio. To determine a straight or subsequently traveled road can Satellite system, for example GPS (Global Positioning System), be used.

Based the above examples of the information that can be collected are suggested for a specialist additions.

It It is therefore pointed out here that the one described here Do not proceed to the above information regarding a traffic and / or driving situation is limited.

In a further step S2 is taking into account the captured information regarding a default size a maximum power supply to a drive of the vehicle for set the onward journey. Preferably, this is achieved by an optimization the default size with respect to the brake and acceleration processes the energy consumption of the onward journey reduced.

For example is determined by a detected position and / or movement information at least one other road user, such as a distance the own vehicle to a preceding vehicle, recognized, that your own vehicle does not have a fixed maximum acceleration should be accelerated. If this is the case, then the maximum acceleration or a size corresponding to the maximum acceleration be set as the default size.

includes the information the driving behavior of the driver, so for example be recognized that unnecessary accelerator pedal movements through lead the driver to unjustified energy consumption. The default size can be chosen in this case be that a favorable medium speed with low Deviations are observed.

Out However, the driving behavior of the driver may also indicate that the driver prefers a sporty driving style. In this case can the default size can be set to be the speed changes desired by the driver hardly affected. On the other hand, it is determined that the driver a low-power driving preferred so can on the Default size a favorable average speed be determined with minor differences.

When Alternative or as a supplement to this can also be based on the Road information acquired a default size be set with respect to the maximum energy input. For example, the road information on a route selected by the navigation system at the beginning of the journey be included in a consumption-optimized driving strategy.

The Default size with respect to the maximum energy input can have a top speed, a middle speed, a maximum deviation from the mean velocity, a maximum acceleration and / or a maximum energy input be. Likewise, as a default size, a state of charge a battery are set. The specified charge state becomes then set to the battery.

In a step S3 is given by a driver of the vehicle Target acceleration detected. The acquisition of the desired acceleration takes place for example, by recognizing and evaluating an actuation an input element for accelerating or decelerating the vehicle the driver.

The Designation of steps S1 to S3 does not specify chronological order to complete the steps. For example, the Step S3 also performed before steps S1 and S2 become.

In a step S4, an actual acceleration taking into account the predefined Vorga set and the specified target acceleration. Preferably, the actual acceleration is set so that when accelerating the vehicle with the actual acceleration, the specified maximum energy supply is maintained.

is the specified default size is a set State of charge of the battery, so the step S4 also automatically be executed. By adjusting the state of charge on the battery is automatically guaranteed that for a predetermined target acceleration is the maximum energy input not exceeding actual acceleration provided becomes.

The Vehicle is subsequently in a step S5 with the actual acceleration accelerated. The actual acceleration is advantageously so chosen that after accelerating the vehicle with the actual acceleration only with a low probability within a given time interval a speed correction, for example a braking operation must be performed.

By The method described here will be that specified by the driver Target accelerations with regard to reduced energy consumption corrected. Since the steps performed by the driver, like pressing the input element to accelerate or decelerating the vehicle by correcting the target acceleration is not directly affected in a more energy-efficient actual acceleration the correction for the driver is not with one Comfort loss associated.

2 shows a schematic representation of a vehicle with a first embodiment of the speed control system.

One based on the 2 schematically illustrated vehicle 10 is designed as an electric vehicle or as a hybrid vehicle. The vehicle 10 includes an electric drive 12 and a battery 14 , which as energy storage and as an energy supplier for the electric drive 12 serves. The battery 14 is an electrochemical energy storage, such as a lead acid battery, a double-layer capacitor, a nickel-metal hybrid cell or a lithium-ion cell. The electric drive 12 not only performs the function of a starter and / or an alternator of the vehicle 10 but serves in particular to a torque as acceleration torque for propulsion of the wheels 15 of the vehicle 10 provide.

By means of control electronics 16 gets the power from the battery 14 to the electric drive 12 controlled. The control electronics 16 Determines if and in what quantity of the battery 14 Taken energy and the electric drive 12 is supplied.

The vehicle 10 also includes a speed control system 18 , whose structure and functioning will be discussed further below. The speed control system 18 has at least one signal input 20 on, which so to a first sensor device 22 , a second sensor device 26 and a data output device 30 coupled is that information signals 24 . 28 . 32 from the devices 22 . 26 and 30 to the signal input 20 to get redirected. For example, the signal input 20 and the devices 22 . 26 and 30 for forwarding the information signals 24 . 28 . 32 to a vehicle bus of the vehicle 10 connected.

The first sensor device 22 is designed to position and / or motion information of at least one further road user and / or a signal of at least one traffic control component in an environment of the vehicle 10 to capture and a corresponding information signal 24 issue. Examples of the position and / or movement information of the at least one further road user and the signal of the at least one traffic control component are enumerated above. The first sensor device 22 may include a camera, image evaluation electronics, at least one ultrasonic sensor and / or a noise detector. The first sensor device 22 may also be divided into a plurality of sub-facilities, which are separated from each other on the vehicle 10 are arranged.

The first sensor device 22 may be a sub-unit of an on-board warning system, an on-board safety system and / or an on-board driver assistance system. Likewise, the first sensor device 22 be designed to interact with the warning system, the safety system and / or the driver assistance system. The warning system is for example a parking aid and / or a warning light system. The safety system may include an airbag deployment device. Examples of the driver assistance system are an ACC system (Adaptive Cruise Control) and an automatic lane keeping system. Thus, the multifunctionality of the first sensor device 22 to reduce the on the vehicle 10 built-in components are used.

The second sensor device 26 is designed to be a driving behavior of a driver of the vehicle 10 to determine and as a second information signal 28 to the signal input 20 provide. The second sensor device 26 monitors for example se an operation of a (not outlined) brake and / or accelerator pedal by the driver. Represents the second sensor device 26 it is clear that the driver often makes the brake pedal within a comparatively short time interval after pressing the accelerator pedal, so the second sensor device lays down 26 the driving behavior of the driver as driving behavior with an unnecessarily high energy consumption. Detects the second sensor device 26 However, that usually takes place within a time interval after an accelerator pedal actuation of the brake pedal by the driver, so recognizes the second sensor device 26 in that the driver does not use the accelerator pedal unnecessarily and thus the driver can be assigned a driving behavior with hardly any increased energy consumption.

The second sensor device 26 can also be used to detect the driver's input to the brake and / or accelerator pedal and provide a corresponding signal to another vehicle control component. For example, the second sensor device fulfills 26 In addition, the function of a conventional brake and / or accelerator pedal sensor. Thus, the second sensor device also has 26 a multi-functionality, which saves on the vehicle 10 can contribute unnecessary components.

The data output device 30 serves to road information for at least one in the onward journey road as an information signal 32 to the speed control system 18 provide. Examples of road information are mentioned above.

The data output device 30 is for example an electrical map and / or a navigation system. Due to the multifunctionality of such a data output device 30 can cost the vehicle 10 be saved.

As an alternative or supplement to the onboard data output device 30 The road information can also be at least partially queried by an external data output system via radio. The vehicle 10 has in this case a suitable transmitting and receiving device, which is additionally usable for sending and receiving further radio signals. Locating the vehicle 10 for determining a straight and subsequently traveled road, for example, via a (not outlined) satellite system, such as GPS (Global Positioning System), take place.

At least one of the devices 22 . 26 or 30 Can also be used as a subunit in a compact speed control system 18 be arranged.

The speed control system 18 includes an evaluation device 34 to which the from the signal input 20 received information of the information signals 24 . 28 and 32 to be provided. The evaluation device 34 is designed in consideration of the received information of the information signals 24 . 28 and 32 a default size with respect to a maximum power supply to the electric drive 12 of the vehicle 10 set. Examples of a definable default size are mentioned above. In the illustrated embodiment, the evaluation device 34 designed as a default size, a state of charge of the battery 14 set. The evaluation device evaluates this 34 the information of the information signals 24 . 28 and 32 out.

Furthermore, possible criteria according to which the evaluation device 34 the state of charge of the battery 14 can specify:
For example, recognizes the evaluation 34 based on the information of the information signal 24 the first sensor device 22 that due to the current traffic situation accelerating the vehicle 10 with a high probability within a short time interval immediately must be undone by a strong braking. In this case, the evaluation device 34 the state of charge of the battery 14 set so that only a relatively low energy extraction, for example between 10% to 15%, is possible. However, the current traffic situation allows a longer driving of the vehicle 10 at a high speed, so can the evaluation device 34 set the charge state to a higher energy value with regard to a possible energy withdrawal.

Likewise, the evaluation 34 based on the information signal 28 the second sensor device 26 Recognize that the driver often performs unnecessary accelerator pedal movements, which must be corrected by a fast subsequent braking process. In this case, the evaluation device 34 recognize that the driver's driving behavior is not as smooth as necessary for reduced energy consumption. About setting the state of charge of the battery 14 however, the aggressive driving style of the driver can be easily corrected to a comparatively small percentage of energy extraction. The evaluation device 34 in this case acts as automatic, self-activating cruise control, similar to a mini-tempomat for city traffic.

As an alternative, the evaluation device 34 However, also be designed to the state of charge of the battery 14 to adapt to a recognized habit of the driver. Recognizes the evaluation Facility 34 For example, if the driver prefers a sporty driving style, then in this case he gives a higher percentage of the state of charge of the battery 14 in front. On the other hand, if the driver prefers uniform driving with almost constant speed, the evaluation device is available 34 a lower percentage for the state of charge of the battery 14 in front. The evaluation device 34 is thus designed to charge the battery 14 adapt to the individual driving behavior of several drivers.

Accordingly, the evaluation device 34 the state of charge of the battery 14 also to the road information of the information signal 32 the data output device 30 to adjust. Detects the evaluation device 34 for example, that the onward journey runs uphill or on a freeway, so sets the evaluation 34 the state of charge of the battery 14 to a high percentage for energy extraction, for example 20% to 30%. On a journey through a residential area, on a road in poor condition, on a road with a speed limit and / or on a road with a high traffic density is the evaluation 34 on the other hand, preferably designed so that they the state of charge of the battery 14 to a low energy extraction percentage, which may range from 10% to 15%.

The one of the evaluation device 34 fixed charge status is as evaluation signal 36 to a control device 38 of the speed control system 18 provided. The control device 38 is designed in the embodiment shown here, the received state of charge via a control signal 40 on the battery 14 adjust. This ensures that the state of charge of the battery 14 is set to the predetermined charge state.

The speed control system 18 is thus designed to charge the battery 14 adapt to a current traffic situation, to a driving style and habits of the driver and / or to road conditions of the onward journey. For telematics, data from electronic maps and / or navigation systems can be used to advantage.

The speed control system 18 is preferably designed so that the driver of the speed control system 18 switch on and off. In this way it is ensured that no loss of comfort not desired by the driver due to the speed control system 18 occurs when the driver is driving with a strong acceleration of the vehicle 10 prefers.

The speed control system described in the above paragraphs 18 can be used in an electric vehicle and in a hybrid vehicle. A hybrid vehicle differs from an electric vehicle in that the hybrid vehicle is in addition to the electric drive 12 and the battery 14 still has an internal combustion engine. In contrast to the electric vehicle, which is completely powered by electrical energy, a hybrid vehicle is only partially powered by electrical energy. This is also referred to as a hybrid drive of the hybrid vehicle. The control electronics 16 is formed in a hybrid vehicle usually as a hybrid controller.

In a hybrid vehicle, the energy storage battery can 14 be recharged while driving by means of an energy provided by the internal combustion engine. Otherwise, it is possible, if the electric drive 12 is designed as a generator for charging the battery 14 perform a recuperative braking. In this case, a braking energy is converted into electrical energy.

While a conventional system is limited to the braking energy for charging the battery 14 to use that is based on the 2 described speed control system 18 designed to brake and accelerate processes in terms of reduced energy consumption of the vehicle 10 to optimize. In this way, the life of the battery 14 increased.

3 shows a schematic representation of a vehicle with a second embodiment of the speed control system.

The schematically illustrated vehicle 50 with a speed control system 52 may be a fuel cell vehicle or a hybrid vehicle. The vehicle 50 includes an internal combustion engine 54 , which has a tank 56 is supplied with a fuel.

The speed control system 52 indicates the signal input 20 on which the already described devices 22 . 26 and 30 the information signals 24 . 28 and 32 provide. The information of the information signals 24 . 28 and 32 be from the evaluation already described 34 for setting a default value with respect to a maximum power supply to the internal combustion engine 54 of the vehicle 50 evaluated. The of the evaluation device 34 Specified default size can be a maximum speed, an average speed, a maximum deviation from the average speed, a Maximum acceleration and / or a maximum injection quantity of a fuel in the Verbrennungsmo tor 54 be. The specified default value becomes an evaluation signal 36 to a control device 60 output.

The speed control system 52 additionally includes another signal input 58 at which one of the driver of the vehicle 50 predetermined target acceleration can be provided. This is the additional signal input 58 for example, to at least one sensor 59 on an input element for accelerating or decelerating the vehicle 50 coupled. The sensor 59 and the second sensor device 26 can also be designed as a compact unit.

The control device 60 is so at the other signal input 58 coupled, that a received target acceleration to the control device 60 is forwarded. The control device 60 compares the target acceleration with the preset default value and then sets an actual acceleration. Preferably, the controller sets 60 the actual acceleration is so tight that the vehicle 50 when accelerating with the actual acceleration does not exceed a predetermined maximum power supply over the default size.

The control device 60 is additionally adapted to at least one acceleration or energy supply component of the vehicle 10 so control the vehicle 50 is driven by the actual acceleration. In particular, the control device 60 a control signal 62 with an injection quantity corresponding to the actual acceleration to an injection valve 64 output.

The speed control system described here 52 is easily modifiable for driving an electric drive of an electric vehicle or a hybrid vehicle.

On Such a modification will therefore not be discussed here.

The present invention is not limited to the two embodiments of the speed control systems described above 18 and 52 limited. Instead, it is about modifying and / or combining the two speed control systems 18 and 52 a variety of speed control systems derivable. As further embodiments of the speed control systems 18 and 52 for a person skilled in the art from the preceding paragraphs, will not be discussed further.

QUOTES INCLUDE IN THE DESCRIPTION

This list The documents listed by the applicant have been automated generated and is solely for better information recorded by the reader. The list is not part of the German Patent or utility model application. The DPMA takes over no liability for any errors or omissions.

Cited patent literature

• - DE 102006000397 A1 [0004, 0004]

Claims (15)

Method for controlling a speed of a vehicle ( 10 . 50 ) with the steps: acquiring information ( 24 . 28 . 32 ) with regard to a traffic and / or driving situation when the vehicle continues to travel ( 10 . 50 ) (S1); Defining a default size ( 36 ) with respect to a maximum energy supply to a drive ( 12 . 54 ) of the vehicle ( 10 . 50 ) for the onward journey taking into account the information collected ( 24 . 28 . 32 ) (S2); Detecting one of a driver of the vehicle ( 10 . 50 ) predetermined target acceleration (S3); Defining an actual acceleration taking into account the specified default value ( 36 ) and the predetermined target acceleration (S4); and accelerating the vehicle ( 10 . 50 ) with the actual acceleration (S5). Method according to claim 1, wherein in accelerating the vehicle ( 10 . 50 ) with the actual acceleration exceeding the preset value ( 36 ) specified maximum energy supply is maintained. A method according to claim 1 or 2, wherein a position and / or movement information of at least one further road user and / or a signal of at least one traffic control component as at least part ( 24 ) of information ( 24 . 28 . 32 ) with regard to the traffic and / or driving situation during the onward journey and to determine the default size ( 36 ) is evaluated with respect to the maximum energy input. Method according to one of the preceding claims, wherein a driving behavior of the driver of the vehicle ( 10 . 50 ) as at least part ( 28 ) of information ( 24 . 28 . 32 ) with regard to the traffic and / or driving situation and to determine the default size ( 36 ) is evaluated with respect to the maximum energy input. Method according to one of the preceding claims, wherein a data output device ( 30 ) Road information for at least one road traveling on the onward journey as at least part ( 32 ) of information ( 24 . 28 . 32 ) with regard to the traffic and / or driving situation during the onward journey and for determining the default size ( 36 ) is evaluated with respect to the maximum energy input. Method for operating a vehicle ( 10 ) with an electric drive ( 12 ) and a battery ( 14 ) to which the electric drive ( 12 ) is coupled so that a power supply of the electric drive ( 12 ) over the battery ( 14 ), comprising the step of: controlling a speed of the vehicle ( 10 ) according to one of the preceding claims. Method according to claim 6, wherein as default quantity ( 36 ) regarding the maximum energy supply, a state of charge of the battery ( 14 ) and on the battery ( 14 ) is set. Speed control system ( 18 . 52 ) for a vehicle ( 10 . 50 ) with: at least one signal input ( 20 ), which is designed to receive a signal from a sensor device ( 22 . 26 ) and / or a data output device ( 30 ) output information ( 24 . 28 . 32 ) with regard to a traffic and / or driving situation when the vehicle continues to travel ( 10 . 50 ) to recieve; an evaluation device ( 34 ), which is designed taking into account the received information ( 24 . 28 . 32 ) a default size ( 36 ) with respect to a maximum energy supply to a drive ( 12 . 54 ) of the vehicle ( 10 . 50 ); and a control device ( 38 . 60 ), which is adapted to at least one acceleration or energy supply component ( 14 . 64 ) of the vehicle ( 10 . 50 ) so that for one of a driver of the vehicle ( 10 . 50 ) predetermined target acceleration an actual acceleration taking into account the specified default value ( 36 ) and the predetermined target acceleration can be determined and the vehicle ( 10 . 50 ) is drivable with the actual acceleration. Speed control system ( 18 . 52 ) according to claim 8, wherein the evaluation device ( 34 ) is adapted to the default size ( 36 ) with regard to the maximum energy supply taking into account a position and / or movement information of at least one further road user and / or a signal of at least one traffic control component as at least part ( 24 ) of information ( 24 . 28 . 32 ) with regard to the traffic and / or driving situation during the onward journey. Speed control system ( 18 . 52 ) according to claim 8 or 9, wherein the evaluation device ( 34 ) is adapted to the default size ( 36 ) with regard to the maximum energy supply taking into account a driving behavior of the driver of the vehicle ( 10 . 50 ) as at least part ( 28 ) of information ( 24 . 28 . 32 ) with regard to the traffic and / or driving situation during the onward journey. Speed control system ( 18 . 52 ) according to one of claims 8 to 10, wherein the evaluation device ( 34 ) is adapted to the default size ( 36 ) with respect to the maximum energy supply, taking into account road information for at least one road traveling on the onward journey as at least part ( 32 ) of information ( 24 . 28 . 32 ) with regard to the traffic and / or driving situation during the onward journey. Speed control system ( 18 . 52 ) according to one of claims 8 to 11, wherein the evaluation device ( 34 ) is designed as a default size ( 36 ) with respect to the maximum energy supply a state of charge of a battery ( 14 ), and wherein the control device ( 38 ) is adapted to the specified state of charge on the battery ( 14 ). Vehicle ( 10 ) with: an electric drive ( 12 ); a battery ( 14 ) to which the electric drive ( 12 ) is coupled so that a power supply of the electric drive ( 12 ) over the battery ( 14 ) he follows; and a speed control system ( 18 . 52 ) according to one of claims 8 to 12. Vehicle ( 10 ) according to claim 13, wherein the vehicle ( 10 ) is an electric vehicle. Vehicle ( 10 ) according to claim 13, wherein the vehicle ( 10 ) is a hybrid vehicle.