DE102008000131A1 - Vehicle operating method, involves utilizing actual driving energy of vehicle in consideration of operating conditional process of vehicle, and producing actual driving energy of vehicle additional to driving force by driving device - Google Patents

Abstract

The method involves operating a vehicle based on an actual position of the vehicle and environmental information of the vehicle. An actual driving energy of the vehicle is used in consideration of an operating conditional process of the vehicle to be expected for the operation of the vehicle. The actual driving energy of the vehicle additional to the driving force is produced by a driving device (2). The additional driving energy of the vehicle is determined from a downhill force acting at the vehicle and/or from the kinetic energy of the vehicle.

Description

The The invention relates to a method for operating a vehicle according to the preamble of claim 1 closer defined type.

driving means of vehicles, which with internal combustion engines or internal combustion engines are increasingly being used in terms of fuel consumption, optimized driving comfort and performance. In particular for reducing the fuel consumption of internal combustion engines These electrical machines are associated with the internal combustion engines train so-called hybrid drives, with the efficiencies second different drive systems combined in the way be that by means of such a total system, a higher efficiency is reached. This shows vehicles with hybrid drives in comparison to vehicles which are designed only with internal combustion engines, a higher one Vehicle mass and are characterized by higher production costs.

Furthermore a variety of other systems and functional approaches are known to reduce fuel consumption of a vehicle. For this will be For example, driving strategies, such as an engine start-stop system, proposed, in the activated state an internal combustion engine in suitable operating conditions automatically switch off and switch on to a vehicle Lower fuel consumption of the internal combustion engine. Furthermore In multi-cylinder engines, individual cylinders are used during suitable operating state courses Energy saving purposes switched off.

In addition to The above procedures are attempted by lightweight constructions reduce vehicle weight or driving resistance, such as For example, an air resistance of a vehicle, by appropriate measures to reduce fuel consumption.

The prescribed measures are disadvantageously often only using high development costs and at the cost of various disadvantages implementable, but what undesirable is.

Of the The present invention is therefore based on the object, a method to provide for operating a vehicle, by means of which the energy consumption of a vehicle in a simple and cost-effective way and way without additional Disadvantages is feasible.

According to the invention this Task with a method for operating a vehicle according to the features of claim 1.

at the method according to the invention for operating a vehicle, that of at least one drive device is drivable, the vehicle is dependent on a current position of the vehicle and in dependence environment information of the vehicle is operated such that a currently on a vehicle attacking and that of the drive device generate additional driving power Drive energy of the vehicle taking into account an expected operating state course of the vehicle for the operation of the vehicle is used.

Of the inventive approach, with the drive power for the drive device is saved, relies on the consideration, the drive device in dependence the currently additional to disposal standing or one in the future to disposal standing drive energy of the vehicle for the purpose of energy saving preferably separate from the drive train and / or turn off.

there increases the number of useful separations or shutdowns of Drive device with the amount of information available for this purpose, which are available in the vehicle itself stand or from the outside can be fed to the vehicle are.

has For example, a navigation device a very fine resolution, so that, for example, roundabouts, traffic lights, place signs or the like be recognized, or be such information from an outside the vehicle arranged transmitting device of a receiver device supplied to a vehicle, Thus, the separation and / or switching off the drive device in one for an energy saving required distance to these made become, in this respect, out of an energetic view calculates that a separation and / or a shutdown of the drive device while meeting others Criteria, such as driving stability and / or a driving safety and / or a comfort claim of a Driver of the vehicle or the like, makes sense.

Consequently it is also possible when entering the destination in the navigation device the most ecological Route to take into account insofar as this corresponds to the driver's request.

In an advantageous variant of the method according to the invention, the additional drive energy of the vehicle from a driving on means current or future attacking slope abrasion force and / or determined from the kinetic energy of the vehicle. In conjunction with the available environmental information of the vehicle, the available downgrade force and the kinetic energy of the vehicle depending on a future or an expected operating state course or a future to be traveled path of the vehicle for the operation of the vehicle is available, the Downgrade force and / or the kinetic energy of the vehicle for driving the vehicle itself and / or for operating other vehicle components, such as an air conditioner, an electrical system or the like, can be operated by appropriate conversion of the additional drive energy.

A designed as an electric machine and with a drive train The vehicle operatively engageable device is at further advantageous variants of the method according to the invention operating condition dependent motor or generator operated to the additionally available Drive energy of the vehicle to the desired extent implement and for the drive device Provided drive energy, such as gasoline or diesel fuel for an internal combustion engine, to be able to save.

at a further advantageous variant of the method according to the invention is a mode of operation of the drive device in dependence the expected operating state of the vehicle varies so that an energy balance in consideration of driving stability and / or Comfort criteria is positive.

The Drive device is in a further advantageous variant the process of the invention separated from the drive train and / or shut off if the current or the expected additional Driving force exceeds a first predefined value and if predefined Safety criteria met are preferably the first predefined value of the current Driving speed of the vehicle and / or of the current or the expected time course of the additional drive energy is dependent.

The Drive device is in a further variant of the method again started and / or connected to the powertrain, if a current or an expected vehicle speed at the time the disconnection and / or shutdown of the drive device present Vehicle speed falls below a predefined threshold and / or if a current vehicle deceleration has a predefined one Value exceeds or if at least one of the predefined security criteria not fulfilled anymore is.

there is the predefined threshold preferably from the time of disconnection and / or shutdown the drive device present driving speed dependent. On simple and inexpensive Way will the extra Drive energy in a variant of the method according to the invention based on navigation data, with the navigation data over the vehicle transmits a transceiver system be and / or from a memory provided in the vehicle actuator be read out.

at a further advantageous variant of the method according to the invention is used to determine the additional Drive energy a current and / or expected altitude the vehicle determined, the altitude of the vehicle is preferably is determined from a map display of a navigation device.

Furthermore is the current altitude of the Vehicle also over an integrated in the vehicle height measuring device, such as a Barometer, determinable, with the metrologically determined current altitude preferably for determining a deviation of a navigation data certain altitude of the vehicle is used.

alternative this will be the additional Drive energy in a further variant of the method according to the invention by means of a current inclination angle of the vehicle determined by a vehicle transverse axis, wherein the inclination angle preferably via a Tilt sensor is detected.

So is, for example, a section of road traveled by the vehicle in the future, in which the drive device can be switched off to save energy is, by the knowledge of the current height as well as by the knowledge the expected or future Height of Vehicle determined in a simple manner.

Further Advantages and advantageous developments of the invention result from the claims and with reference to the drawings in principle Embodiment.

It shows:

1 a highly schematic block diagram of an embodiment of the method according to the invention;

2 a representation of a first module of the method according to 1 ;

3 a representation of a second module of the method according to 1 ; and

4 an illustration of a third module of the method according to 1 ;

In 1 is a highly schematic block diagram of an embodiment of the method according to the invention shown, which consists of three modules A, B and C, which in 2 to 4 are shown in more detail.

In this case, the driving safety and the driving stability of the vehicle is considered and ensured by means of the module A and a shutdown of at least one drive unit of a drive device 2 of a vehicle only with the release determination of customer- and / or vehicle-dependent defined safety values made.

The drive device 2 includes in the considered embodiment of the method according to the invention both an internal combustion engine 3 as well as an electric machine 4 , wherein the internal combustion engine 3 in a manner known per se via a switching element from the rest of the drive train of the vehicle is disconnected and preferably switched off depending on the operating state and via the electric machine 4 can be switched on.

The electric machine 4 is operable both motor and generator, in particular during the generator operation of the electric machine 4 a Rekuperationsbetrieb for generating electrical energy can be displayed.

Next In the driving safety and driving stability subsystems, module A comprises a distance measuring system, by means of which the distance to vehicles in front automates is controllable, the over the distance measuring system adjusting distance depending on speed or independent of the vehicle speed is adjustable. The distance measuring system determines this the distance to vehicles ahead via radar, ultrasound, infrared or microwaves.

The driving safety system makes safety-relevant systems aware of their activity during the shutdown of the drive unit 2 that is the internal combustion engine 3 and / or the electric machine 4 , in the off state of the drive device 2 as well as during the restart of the drive device 2 checked. Among other things, it checks whether the electric machine 4 has a short circuit and / or whether the battery state of charge from the electric machine 4 associated electrical storage devices is sufficient.

About the Dynamic Stability Control become gear-acting moments on the vehicle as well as in vehicle longitudinal and / or monitored in the vehicle transverse direction acceleration moments acting on the vehicle. About that In addition, a steering angle, an operating state of a quick-start system, an operating condition of a brake system, an operating condition a trailer detection as well as the proper functions more for the driving stability responsible aggregates or functionalities.

through of the second module B is a position detection of the vehicle relative to its surroundings in spatial and / or time. Module B represents the key function for the Method according to the invention, as a function of the accuracy of the Information flow the scope of the resulting energy savings program increases.

there be from the position detection of the module B all from the outside or internally independent calculated information about that of the vehicle currently and in the future traveled route used to the vehicle and other vehicle components the vehicle as possible under Use of the additional to disposal standing drive power of the vehicle, that is, for example one available standing potential energy of the vehicle and one of a current or future ones Slope of the vehicle resulting downgrade force and / or a kinetic energy of the vehicle to power and a consumption the for the operation of the drive device to be provided drive energy to lower.

there the position detection of module B accesses an inclination measurement back, by means of the current inclination of the vehicle about its transverse axis can be determined metrologically. Additionally or alternatively communicates the position detection with a navigation device of the vehicle, which a three-dimensional map to detect different altitude potentials on the future of Having traveled the route or the route section.

Depending on the respective present application example, the position detection additionally comprises, or alternatively, a receiver unit that communicates with transmitting units, such as traffic signs, traffic lights and the like, and from these externally arranged vehicle devices signals over the length and gradient of a future to be traveled by the vehicle Stre to obtain a section of the bridge. Based on this information then the current and future available additional drive energy is calculated, which can be used for example to reduce fuel consumption.

By means of the third module C, a driver request identification is performed and a calculation unit 1 , which is also connected to the modules A and B supplied. About the calculation unit 1 becomes the drive device 2 operated in the manner described to save drive energy, such as electric power or fuel.

Of Further, by means of the driver request recognition a general distinction carried out, whether a transmission device as an automatic transmission or as a manual transmission accomplished is and whether an automatic transmission of an electric transmission control device automatically operated becomes. If the vehicle is equipped with a manual transmission, it will the inventive method first performed, if a neutral operating state is engaged in the transmission device is. Is the vehicle equipped with an automatic transmission that leads over the automatic transmission control device is automatically actuated, is in the automatic transmission the translation stage independently interpretable and the inventive method activated, which in a powertrain with an automatic transmission also the selector lever position neutral as driver request recognition for activating the procedure.

Of Further will be over the driver request recognition verifies whether a trailer is attached to the vehicle or not. additionally is checked if a Cruise control is activated and how the relation of the accelerator pedal position to the requested performance and which degree is the positive or has negative acceleration of the vehicle. In addition, over the Driver request recognition checks in which Scope a service brake of the vehicle and / or an accelerator pedal of the vehicle operated and with what current gradient the operation of this both institutions takes place.

Furthermore will over the module C also a so-called main switch for the short-distance guidance system function according to the invention queried, this functionality depending on the particular present embodiment is provided or not.

The sampling rates of the three modules A to C are also carried out differently or equally fast depending on the respective application case, the sampling rates also defined, preferably depending on the vehicle speed, can be made variable. In addition, the assignment of the individual systems to the modules A to C can be varied in further exemplary embodiments, so the distance measuring system can also be arranged in the region of the third module C. It is crucial that the information is processed logically, in order to determine according to a resulting balance, whether the main drive or the internal combustion engine 3 required amount of raw material or fuel consumption of the drive device 2 is reducible.

The main priority for performing the short-range control system functionality is in the range of the first module A. This means that the shutdown and / or the disengagement of the internal combustion engine 3 based on driving safety and driving stability.

About the first module A, a driving safety state of the vehicle is continuously determined. If a safety-critical condition of the vehicle is detected, the short-range control system functionality is disabled or unauthorized to operate the vehicle and the engine switched off 3 switched on again, insofar as this is necessary in terms of driving stability and / or to reach the maximum operating pressures. In addition, there is the possibility of targeted shutdown or leaving the engine switched off state 3 depending on whether an inevitable accident has been detected.

When among other things, the vehicle axles are critical to safety Torques considered a customer and / or a vehicle-specific Exceed range. Furthermore, there is also a high power requirement of the driver as a safety criterion viewable as a strong acceleration also out of the intension can be that an accident by a high acceleration should be avoided.

The Detection of whether a trailer is coupled to the vehicle is depending on the vehicle, vehicle speed and maximum payload dependent on different specifications. This results from the Fact that the vehicle deceleration and also the positive vehicle acceleration of a vehicle with and without a trailer significantly different, which also the framework conditions for the Getting started in the short-haul control system functionality vary.

Furthermore, the maximum allowable minimum distance to preceding vehicles for activating the short-range guidance system functionality varies depending on whether a trailer is attached to the vehicle or not. About that In addition, it may also be provided that a maximum speed, above which the method according to the invention is deactivated, is lower for vehicles with trailers compared to trailerless vehicles.

In addition are for vehicles with trailers on the vehicle attacking gear moments allowed to a lesser extent. This applies to Further operating state parameters of the vehicle, their permissible limits, Above the driving safety of a vehicle with trailer is at risk, lower are as in a vehicle without a trailer.

Furthermore, the readiness of the main brake system of the vehicle is checked via the first module A, which must be ensured in each case. In the event that the main brake system is not from the internal combustion engine 3 has decoupled, its readiness over the period of the restarting brake motor 3 be ensured, for example, via a separate accumulator.

A battery state of charge of electric machines associated with the electrical machine serves as a function of the starting time of the main drive or of the internal combustion engine 3 the drive device 2 and also represents a safety function, insofar as the customer and / or vehicle-specific start times can not be achieved with the present at the time of shutdown battery voltage.

in the third module C is in the manner described in the first Approach the distinction between a manual transmission and an automated manual transmission and an automatic transmission carried out. In the presence of a drive train, with a manual transmission is formed, the inventive method is present the driver's default for a neutral operating condition in the transmission device to which in the transmission device, a power flow is interrupted, activated. This results from the fact that, at least in current manual transmissions no automatic function is maintained, interpret a translation in the gear operating state-dependent automatically and to convert the transmission device into a neutral operating state. One automated manual transmission therefore requires the same functional reserve like a manual transmission.

Drive trains that are formed with automatic transmissions, can be treated differently by an extension of the software. So there is the possibility that an automatic transmission is in principle over the driver's request away and interpret a translation in the transmission and the internal combustion engine 3 can be decoupled from the drive train, which is still the decisive criterion of the third module C is the detection of the driver's request.

there represents a so-called driver-type recognition a standard in which it is determined how the driver operates his vehicle and a more sporty or a more fuel-efficient or cozy or defensive driving behavior is verified. For this will be Accelerator accelerations and the quantity of these actuations measured, the switching operations analyzed, the severity of the braking events detected and more Mode operations determined and evaluated.

In addition, the determined driver behavior or the temporary characteristic of the driver is also used for the actuation of the short-range guidance system function or of the method according to the invention. Thus, it is possible with the detection of the temporary property of the driver "comfortably" trigger the short-range control system function or from the detection of this event, the shutdown of the internal combustion engine 3 instead of a separation of the internal combustion engine 3 to provide from the drive train. In addition, there is also the possibility of research for meaningful shutdowns of the internal combustion engine or after meaningful decoupling processes of the internal combustion engine from the drive train in conjunction with an operating state of a switch in the cockpit, which can be activated by the driver and over the short-range control system functionality is releasable, make.

The Detecting the driver type is helpful, but not crucial. Alternatively, it can also be provided that another software function or another controller provides such a driver-type recognition, to which the inventive method accesses the short-range control system functionality also in Vehicles can be integrated, without driver type recognition accomplished are.

On the additional in the cockpit arranged switch, over which the driver releases the Kurzstreckenleitsystem functionality, the driver signals that he has a fuel-efficient operation the vehicle wishes or the short-range control system functionality does not currently want to perform.

As a general rule is the release or activation of the inventive method on the Module A present with the highest priority provided, whereby a motor decoupling or shutdown is not allowed is detected when safety-critical operating conditions of the vehicle become.

General objective of the invention Ver driving is it, the internal combustion engine 3 or the drive machine of the drive device defined as the main drive 2 To turn off temporarily during driving as sensible as possible in terms of fuel economy and / or decouple from the drive train. This specification is not feasible with vehicles without corresponding sensors or without corresponding information sources.

Out For this reason, there is a first highly simplified approach of the method according to the invention It is to detect the inclination angle of a vehicle and the Then disconnect the main drive or decouple from the drive train, if a vehicle-specific threshold is reached. With this simple one Approach can not yet be determined how useful this Shutdown is because possibly in the following section this slope condition is no longer met and the main drive must be restarted. Thus, in unfavorable operating state progressions permanent On and off the main drive or a permanent off and Engaging the main drive causes, in turn, a strong Affects the life of the components or simply a bad one feedback signaled to the driver.

Out For this reason systems are preferred, by means of which a current height potential a vehicle is determined, with the addition of the slope course of the upcoming section can be determined. Then is in particularly advantageous Way a comparatively accurate vehicle-specific energy balance producible, which in turn the shutdown and / or a separation of the Main drive of the drive train can be performed optimized can.

there is in principle distinguishable, whether the system with both variants, this means with the shutdown and the decoupling function or only one of both functions executed is. About that However, there is also the possibility the energy balance from the outside show by the vehicle information about the upcoming section of the route supplied externally become.

This is a Navigation device, which is a height representation on the road map realized or the current and the expected height of the vehicle over a Satellite query determined, particularly suitable. Such a navigation device offers the necessary Calculation basis for a balance sheet analysis. The expected height of the vehicle can be off that of the vehicle in the future driven route, or if this does not exist is over, too logical points of the route are determined.

Becomes for example, the next mouth, the next Roundabout or the vehicle speed in each case Detecting a decreasing obstacle, the distance between the current one Position of the vehicle and this obstacle is determined and a gradient of Determined route. Will recognize that the vehicle is on this route continue to roll at its initial speed or its speed until then diminish to an adequate extent All other entry parameters of modules A to C for the Activation of the method according to the invention Fulfills, is the shutdown and / or disengagement of the main drive a vehicle made to save fuel.

there the values from which the main drive is decoupled and / or is switched off, expediently determined vehicle-specific and are also specified driver-specific. It is also not necessary, the speed to hold the vehicle.

So exists, for example, with knowledge of the future route of the vehicle and thus the knowledge about the route the way over the Short-range guidance system function the vehicle speeds in the corresponding curves, turns, roundabouts and the like calculate and the vehicle already while rolling the vehicle to the aforementioned route events under consideration a currently meaningful speed course energy-optimized to operate.

The Activation of the short-range control system function must or can be released by the driver. The way will not considered. So the driver can for each separate savings section will be asked to release the function this being for example about a simple confirmation a switch on the steering wheel can be done. In addition, also a general on / off switch for the inventive approach be provided over which the function of the invention can be activated or deactivated without separate driver query. About that However, there is also the possibility that despite the general activity of the function activating switch before the energy saving mode a previous driver query takes place. To the latter function to deprive, would be it is conceivable to use further signaling, such as a kickdown switch, which deactivates the function according to the invention.

In addition, or in addition to this, the signaling that a route section that is suitable for the energy saving has been achieved, to a vehicle from the outside of the vehicle ordered facilities, such as permanently installed transmission units, such as city signs, roundabouts, traffic lights, other vehicles and the like, can be sent. It should be remembered that the transmitted signals of a time-dependent, variable situation, such as a traffic light switches in X seconds to green or red, subject and can be used by the function according to the invention accordingly.

The Regulation of the distance to the car in front is also an important Function of the short-range control system functionality, wherein this functionality also by the driver, who then represents the distance control member, is feasible and the shutdown of the internal combustion engine only after a security inquiry feasible is.

in principle the internal combustion engine is not switched off when the current Distance to the car at the time of a shutdown request for the brake system without additional Motor brake corresponds to a critical distance. But is the whole Brake power supply from the operating state of the internal combustion engine independently, because the full braking power even without the connected internal combustion engine unlimited is usable, is a shutdown of the internal combustion engine in the first approach independently from the distance from the vehicle in front feasible. That's the benefit higher achievable with the short-range guidance system function. Out comfort reasons is the integration of the controlled, driver-independent distance control, however quite reasonable.

Basically, over the inventive approach Energy can be saved in the operation of a vehicle. The more comprehensive this through an intelligent, anticipatory shutdown and / or Disengaging an internal combustion engine of a vehicle is feasible, the higher is the achievable benefit. For this reason, it is only in certain operating conditions a vehicle makes sense to turn off the engine and a vehicle speed during, for example, one Downhill operation above a generator-operated electric machine of the vehicle, via the then a Rekuperationsbetrieb is feasible to regulate.

It However, even then a not inconsiderable share of Fuel saved if the recuperation is not performed and the internal combustion engine only switched off and / or from the drive train is decoupled.

One the vehicle braking control element is also the valve train of the Internal combustion engine, which is the valves of the internal combustion engine independently from the rotational movement of the crankshaft opens and closes. there It may be provided that the valves for minimum or maximum compression only partially closed or over close one bar once and open again. The advantage achieved by this is that a comparatively fast heat up the internal combustion engine only by friction without supply of Fuel feasible is, whereby a fuel consumption of the internal combustion engine after a Cold start is further reducible.

Of the Driving comfort for a driver also plays a major role here. So should during the activated inventive approach yet one desired by the driver Temperature in the vehicle interior can be provided.

As a general rule is in active method according to the invention also an increase in speed is allowed if the driving stability of a Vehicle not impaired and the speed increase is a speed dependent and / or vehicle and customer-specific value does not exceed. It is the supportive Effect of the mechanical service brake of the vehicle conceivable and for comfort reasons System-appropriate sense. Will run as a main engine main drive of a vehicle over the procedure according to the invention disconnected and decoupled from the powertrain, maximum energy savings in a considerable operating range of the vehicle simple and inexpensive Way achievable. At the same time, the subsequent start the internal combustion engine and the coupling to the drive train tunable to each other and jointly optimized to achieve further energy savings.

Becomes the internal combustion engine over the inventive method in certain operating conditions a vehicle is not switched off, but decoupled from the drive train, Energy is saved even if a shutdown of the internal combustion engine not yet profitable. Furthermore if fuel can also be saved in operating states of the vehicle, if the shutdown of the engine for safety reasons is not feasible or when the internal combustion engine requires one for a shutdown Operating temperature has not yet reached.

In addition is the internal combustion engine to increase the comfort of the start of the disconnected internal combustion engine Temporarily decoupled from the drivetrain just before the start, because with a such approach by the starting process in the drive train generated reaction moments are avoided.

In addition exists also the possibility that the internal combustion engine with activated short-range control system function disconnected and not disconnected from the powertrain to save fuel. The internal combustion engine can be operated with a controllable drag torque reduction function be, with a remaining, preferably lower, of the Internal combustion engine outgoing drag torque of the faster cooling of the Combustion engine counteracts and thus the emission levels the later re-commissioned combustion engine favors. A Such a procedure is particularly useful during a longer downhill ride on, wherein the internal combustion engine before the starting process of the internal combustion engine again temporarily can be decoupled from the drive train.

In addition exists when connected to the drive train and disconnected internal combustion engine through an adapted drag torque reduction also the possibility a distance control of the vehicle and a regulation of a target vehicle speed perform.

Basically in the method according to the invention an energy balance of a vehicle, especially taking into account a vehicle mass, a vehicle speed, a state of charge an energy storage of an electric machine, a power-on state of consumers, such as air conditioning, heating, seat heating and derglei chen, and other operating state parameters of a Car performed. Here, for example, a current downgrade force or a Downgrade force equivalent Navigation data that a vehicle, for example, from outside the vehicle's relay equipment, via satellite, of traffic signs, traffic lights and the like.

Furthermore is used to determine the additional drive energy that can be used to operate the vehicle a distance to a vehicle in front or ahead Vehicles determined by the distance measuring system. One at the time the shutdown of the drive device present vehicle speed is by means of a generator operation of the electric machine and / or an automatic braking intervention of the service brake of the vehicle and / or one generated by the drive means Shear moment held.

at Another variant of the method according to the invention is a Vehicle speed from the switch-off from the to Stop time present vehicle speed by means of a regenerative operation of the electric machine and / or a automatic braking intervention of the service brake of a vehicle and / or a thrust torque generated by the drive device within a predefined, preferably speed-dependent, Driving speed range held.

Additionally or Alternatively, one operatively connected to the drive train electric machine operated as a generator and / or an automatic Brake intervention of the service brake of the vehicle and / or of the Drive device applied a thrust torque at the output, if a Deviation between the current vehicle speed and the at the switch-off time of the drive device present vehicle speed greater than a predefined, preferably speed-dependent, Amount is.

In turn alternatively or additionally to the above-described procedure, the drive device Driven by the powertrain timed or event-controlled separately and / or switched off to an energy requirement of the drive device to reduce.

Becomes detects an imminent unavoidable accident of the vehicle, is used to avoid the risk of rotating out in the event of a crash Masses the internal combustion engine switched off.

is the vehicle with a speed control system or a cruise control executed it is possible, a guideline speed entered by the driver for energy saving to deactivate while deactivating a signal to the driver as audible, visual or haptic signal can be output.

The inventive method or the short-distance guidance system function is also in a traffic guidance includable. It may be provided that the internal combustion engine while a congestion bypass or congestion prevention is turned off and thus energy by using the additional drive energy of the Vehicle is saved.

1

calculation unit

2

driving means

3

Main drive, Internal combustion engine

4

PTO, electric machine

Claims (19)

Method for operating a vehicle, which is controlled by at least one drive device ( 2 ) at is drivable, characterized in that the vehicle is operated in response to a current position of the vehicle and in dependence on environmental information of the vehicle such that a currently attacking on a vehicle and to that of the drive means ( 2 ) generated driving force additional drive energy of the vehicle is used in consideration of an expected operating state course of the vehicle for the operation of the vehicle. Method according to claim 1, characterized in that that extra Driving energy of the vehicle from an attacking force acting on the vehicle downhill and / or determined from the kinetic energy of the vehicle. A method according to claim 1 or 2, characterized in that as an electrical machine ( 4 ) trained and can be brought into operative connection with a drive train of the vehicle device operating state dependent motor or generator operated. Method according to one of claims 1 to 3, characterized in that a mode of operation of the drive device ( 2 ) is varied in dependence on the expected operating state course of the vehicle such that an energy balance taking into account driving stability and / or comfort criteria is positive. Method according to claim 3 or 4, characterized in that the drive device ( 2 ) of the vehicle is switched off depending on the operating state and / or disconnected from the drive train of the vehicle. Method according to Claim 5, characterized in that the drive device ( 2 ) is disconnected from the powertrain and / or disabled when the current or expected additional drive force exceeds a first predefined value and when predefined safety criteria are met. Method according to Claim 6, characterized that the first predefined value of the current driving speed the vehicle and / or the current or expected temporal course of the additional Drive energy dependent is. Method according to claim 6 or 7, characterized in that the drive device ( 2 ) is started again and / or connected to the drive train when a current or expected vehicle speed falls short of the vehicle speed present at the time of disconnection and / or shutdown of the drive device by a predefined threshold value and / or if an actual vehicle deceleration exceeds a predefined value, or if at least one of the predefined safety criteria is no longer met. Method according to Claim 8, characterized in that the predefined threshold value from that at the disconnection and / or switch-off point in time of the drive device ( 2 ) is dependent on the present driving speed. Method according to one of claims 1 to 9, characterized that extra Drive energy is determined by means of navigation data, the Navigation data to the vehicle via transmits a transceiver system be and / or from a memory provided in the vehicle actuator be read out. Method according to one of claims 1 to 10, characterized that to determine the additional Drive energy a current and / or expected altitude of the vehicle is determined. Method according to one of claims 1 to 11, characterized that the current altitude of the vehicle by means of a height measuring device integrated in the vehicle is determined, wherein the metrologically determined current altitude preferably for determining a deviation of a navigation data certain altitude of the vehicle is used. Method according to one of claims 1 to 12, characterized that the extra drive energy by means of a current inclination angle of the vehicle about a vehicle transverse axis is determined. Method according to one of claims 1 to 13, characterized that an expected time course of the additional Driving energy from the planned route or one expected Course of the route, in particular from the expected geodesic height difference the route or the course of the route is determined. Method according to one of claims 1 to 14, characterized that for determining the usable for the operation of the vehicle additional Drive energy a distance to a preceding vehicle or to preceding vehicles by means of a distance measuring system is determined. Method according to one of claims 1 to 15, characterized in that at the time of switching off the drive device ( 2 ) present vehicle speed by means of a regenerative operation of an electric machine ( 4 ) and / or an automatic braking intervention of the service brake of the vehicle and / or one of the drive device ( 2 ) thrust torque is maintained. Method according to one of claims 1 to 16, characterized in that a vehicle speed from the switch-off time of the drive device ( 2 ) starting from the vehicle speed present at the time of switch-off by means of a generator operation of an electric machine ( 4 ) and / or an automatic braking intervention of the service brake of the vehicle and / or one of the drive device ( 2 ) thrust torque is maintained within a predefined, preferably speed-dependent, driving speed range. Method according to one of claims 1 to 17, characterized in that an electrically connected to the drive train electrical machine ( 4 ) is operated as a generator and / or an automatic braking intervention of the service brake of the vehicle and / or by the drive device ( 2 ) a thrust torque is applied to the output, if a deviation between the current vehicle speed and that at the switch-off time of the drive device ( 2 ) present vehicle speed is greater than a predefined, preferably speed-dependent, amount. Method according to one of claims 5 to 18, characterized in that the drive device ( 2 ) is timed or event-controlled separated and / or switched off by the drive train.