DE102017216380A1 - Method for controlling an at least partially electrically operable loader for a motor vehicle with an internal combustion engine - Google Patents

Abstract

Method for controlling an at least partially electrically operable loader for a motor vehicle (1) with an internal combustion engine (2), wherein during a stop state of the motor vehicle (1) in a start / stop operation, a switch-on condition for the motor vehicle (1) means at least one state variable of the motor vehicle (1) is determined that the switch-on condition predicts a start of the motor vehicle (1) and the loader is activated as a function of the switch-on condition of the motor vehicle (1).

Description

State of the art

The invention relates to a method for controlling an at least partially electrically operable loader for a motor vehicle with an internal combustion engine according to the independent claims. Furthermore, the invention relates to a computer program that is configured to perform one of the methods.

In the course of downsizing combustion engines with exhaust-driven charging devices, the effect of the dynamic start-up delay of charging devices increases with a torque request, the so-called turbo lag. A driver notices the turbo lag by an initially only moderate acceleration of the motor vehicle, even if he fully actuates the accelerator pedal, because the boost pressure dependent control ensures that the maximum possible injection quantity is increased only by the degree by which the boost pressure increases. Therefore, one possible measure is to use, instead of exhaust-driven charging devices, electrically operable compressors or to provide exhaust-driven charging devices with electric assistance drives. Due to the usually fast response time of the electrically operable compressor, the boost pressure build-up can be made much faster than is the case with purely exhaust-driven charging devices. The use of an electrically operable compressor allows a performance-oriented design of the charging operation, so that a significant increase in specific power can be achieved.

The electrically operable compressor may be integrated downstream of the charge air cooler in the charge air passage, so that the volume to be compressed after the electrically operable compressor is minimized.

The DE 10 2015 216 126 A1 discloses a method for operating an internal combustion engine, wherein the internal combustion engine has at least one cylinder ( 10 ) with at least one piston ( 11 ), wherein the cylinder has at least one inlet valve and at least one outlet valve. The internal combustion engine is at least one electrically driven compressor ( 21 ), in particular an additional electric compressor assigned. To carry out a pneumatic start of the internal combustion engine, the compressor ( 21 ) electrically driven.

Disclosure of the invention

The invention relates to a method and a device for controlling an at least partially electrically operable loader for a motor vehicle with an internal combustion engine and a computer program on a storage medium for carrying out the method. Advantageous developments are the subject of the independent claims.

In a first aspect, the invention relates to a method for controlling an at least partially electrically operable charger for a motor vehicle with an internal combustion engine, wherein a switch-on condition for the motor vehicle during a stop state of the motor vehicle in a start / stop operation by means of at least one state variable of Motor vehicle is determined, wherein the switch-on condition predicts a start of the motor vehicle and the loader is activated in response to the turn-on condition of the motor vehicle.

This has the particular advantage that sufficient compressed fresh air is already available for the combustion process for an imminent acceleration process before the start or restart or run-up of the internal combustion engine. By anticipating or predicting the start or restart from the start / stop operation of the internal combustion engine, the supercharger can be activated early and thus a fast and dynamic response for the acceleration process can be achieved. Thus, the method intervenes before the well-known in the art control for loaders, so that an optimal performance increase during acceleration can be achieved. The motor vehicle is thus already before the acceleration process, z. B. detected by the operation of the accelerator pedal, or prior to the start or run-up of the internal combustion engine sufficient boost pressure available, so that a delayed response to the acceleration process after leaving the start / stop operation, due to lack of stoichiometry, can be avoided. Thus, the existing in mechanical superchargers "turbo lag", due to weak exhaust gas mass flow during startup, be eliminated. The same applies to purely electric superchargers, which are activated only with the detection of the driver's request and only from this point produce a charge air compression. Furthermore, the loader is also understood to mean a charging device.

In a further aspect of the invention, a method for controlling an at least partially electrically operable loader for a motor vehicle with an internal combustion engine, wherein a starting process of the motor vehicle is predicted by means of at least one state variable of the motor vehicle and the loader is activated in response to the predicted startup of the motor vehicle, proposed.
This has the particular advantage that sufficient compressed fresh air is ready for the combustion process for an imminent starting operation of the motor vehicle. By anticipating or predicting the starting process, the supercharger can be activated at an early stage and thus a fast and dynamic response to the acceleration process can be achieved. Thus, the method intervenes before the well-known in the art control for loaders, so that an optimal performance increase during acceleration can be achieved. The motor vehicle is thus already before the actual acceleration process of the motor vehicle sufficient boost pressure available, so that a delayed response to the acceleration process, due to lack of stoichiometry, can be avoided. Thus, the existing in mechanical superchargers "turbo lag", due to weak exhaust gas mass flow during startup, be eliminated. The same applies to purely electric superchargers, which are activated only with the detection of the driver's request and only from this point produce a charge air compression. Furthermore, the loader is also understood to mean a charging device.

In an advantageous development it can be provided that the at least one state variable of the motor vehicle is a rotational speed signal and / or an actuation signal of a brake pedal and / or an actuation signal of a clutch and / or a video signal of a video camera and / or a congestion information signal.
This is advantageous because the turn-on or run-up condition for the motor vehicle can be determined in a simpler manner by the state variable of the motor vehicle. Thus, by means of the switch-on condition, the start, restart or run-up of the internal combustion engine of the motor vehicle can be predicted.

Furthermore, it can be provided that, depending on a predefinable vehicle mode, in particular a sports vehicle mode or a race vehicle mode, a specifiable boost pressure for the loader is set. By means of the settings of the ride comfort functions, preferably sports vehicle mode or race vehicle mode, a different speed specification for the loader can be specified, so that a different increased power assistance by the loader for the internal combustion engine is adjustable.

Furthermore, it can be provided that by means of at least one release condition of the motor vehicle, the activation of the partially electrically operable loader is at least temporarily suppressed.
This is of particular advantage since, depending on the release condition, an increased power supply can be checked by the activation of the charger, which can be operated in part electrically, and optionally suppressed.

Advantageously, the at least one release condition is determined by means of a sensor unit which detects the environment around the motor vehicle. In order to check the plausibility or necessity of the activation of the loader, it is advantageous if the immediate environment around the vehicle can be monitored by means of sensors.

In this case, it can be provided that the sensor unit comprises an image sensor and / or radar sensor and / or ultrasound sensor and / or a communication unit.
The sensors allow the environment around the vehicle to be inspected for obstacles and other road users so that release decisions can be made depending on the environment being analyzed.

It is particularly advantageous if the at least one release condition is determined as a function of a Car2Car or Car2Infrastructure communication signal.
By exchanging data between motor vehicles and / or infrastructures, such as traffic lights and potential risk portfolios, such as: As schools and retirement homes, has the particular advantage that an optimal decision to release the activation of the loader are determined. In this case, objects such as lanterns and / or street signs can indicate risk areas or risk location by means of wireless communication units.

It is advantageous if the at least one release condition is determined as a function of a congestion information signal.

In further aspects, the invention relates to a device, in particular a control unit and a computer program, which are set up, in particular programmed, for executing one of the methods. In yet another aspect, the invention relates to a machine-readable storage medium on which the computer program is stored.

list of figures

• 1 eine schematische Darstellung eines Kraftfahrzeugs 1 mit einer Verbrennungskraftmaschine 2,
• 2 den beispielhaften Ablauf des Verfahrens anhand eines Ablaufdiagramms in einer ersten Ausführungsform,
• 3 den beispielhaften Ablauf des Verfahrens anhand eines Ablaufdiagramms in einer zweiten Ausführungsform,
• 4 den beispielhaften Ablauf des Verfahrens anhand eines Ablaufdiagramms in einer dritten Ausführungsform.

The invention is described in more detail below with reference to the accompanying drawings and to exemplary embodiments. Show

• 1 a schematic representation of a motor vehicle 1 with an internal combustion engine 2 .
• 2 the exemplary procedure of the method with reference to a flowchart in a first embodiment,
• 3 the exemplary procedure of the method with reference to a flowchart in a second embodiment,
• 4 the exemplary sequence of the method with reference to a flowchart in a third embodiment.

Description of the embodiments

The 1 shows a motor vehicle 1 with an engine system 20 and an internal combustion engine 2 containing a number of cylinders 3 having. The present embodiment shows without limitation a four-cylinder internal combustion engine 2 , The internal combustion engine 2 can be designed as a diesel or gasoline engine.

The internal combustion engine 2 is ambient air via an air supply system in a conventional manner 4 fed and combustion exhaust gas from the cylinders 3 via an exhaust system 5 dissipated. The air supply system 4 is above inlet valves (not shown) with the cylinders 3 the internal combustion engine 2 in a conventional manner in conjunction. Combustion exhaust gas is introduced into the exhaust system via respective exhaust valves (not shown) 5 expelled in a conventional manner.

It is a charging device 6 provided, which is an exhaust gas turbine 61 in the exhaust system 5 has and a compressor 62 in the air supply system 4 having. The following is under the charging device 6 also understood a loader. The turbine 61 is with the compressor 62 mechanically coupled, allowing exhaust enthalpy in the turbine 61 is converted into mechanical energy, for the compression of ambient air removed from the environment in the compressor 62 is used.
In addition, the charging device 6 using a backup drive 8th that provides additional mechanical energy via the mechanical coupling between the turbine 61 and the compressor 62 can bring in, be electrically operated, so that the compressor 62 can also be operated independently of the turbine provided mechanical energy.
The electrical assistance drive can be implemented in various designs. For example as a media gap motor in front of the compressor wheel, as a mid-engine between the turbine and the compressor wheel or as an additional electric compressor in the air supply system 4 ,

In an alternative embodiment, the engine system 1 no partially exhaust gas driven charging device 6 on, but a purely electrically operated charging device 6 ,

Downstream of the compressor 62 can be a charge air cooler 7 be provided. Downstream of the intercooler 7 can be an additional, purely electrically operable compressor 8th' be provided to in a Saugrohrabschnitt 41 of the air supply system 4 Charge air to provide under a boost pressure.
The boost pressure in the charge air section 41 results from the compression capacities of the compressor 62 and the additional purely electrically operated compressor 8th' ,

The charge air section 41 is through a throttle 9 bounded downstream. Between the throttle 9 and intake valves (not shown) of the cylinders 3 the internal combustion engine 2 there is a Saugrohrabschnitt 42 of the air supply system 4 ,

Between a section of the exhaust system 5 located between exhaust valves (not shown) of the cylinders 3 the internal combustion engine 2 and the turbine 61 is located, performs an exhaust gas recirculation line 10 in the suction pipe section 42 , In the exhaust gas recirculation line 10 can be an exhaust gas recirculation valve 11 be arranged to adjust the height of the recirculated exhaust gas mass flow can.

It is a control unit 15 provided to the internal combustion engine 2 in a conventional manner by placing the position sensor, such as the throttle valve 9 , a charger on the turbine 61 (not shown), the exhaust gas recirculation valve 11 and the like according to a current operating state of the internal combustion engine 2 and operates according to a specification, for example a driver's desired torque.

Furthermore, the motor vehicle has 1 via a sensor unit 50 , This sensor unit 50 may include multiple systems for detecting the environment around the motor vehicle 1 include, such. B. video cameras or image sensors for detecting the immediate environment around the motor vehicle 1 , Radar sensors, ultrasonic sensors, lidar systems (light detection and ranging) preferably for the detection of distance and velocity measurements for the remote measurement of atmospheric parameters.

Furthermore, the sensor unit 50 be configured for congestion information, in particular via a wireless connection such. B. receive TMC signals (TMC - Traffic Message Channel) and / or via mobile radio communication links.

Alternatively or additionally, the sensor unit 50 also a Car2Car and / or a Car2lnfrastructure communication interface include, which z. B. position data or operating data of the motor vehicle 1 , such as As speed, speed, etc., with other equipped with this interface motor vehicles in the immediate vicinity can be replaced. The communication is preferably wireless, via communication standards such. Eg IEEE 802.11. Infrastructures, such. B. traffic lights can transmit their current operating state, such. B. the current Beschaltungszustand or the change of Beschaltungszustand eg from red to green.

The case of the sensor unit 50 determined data may preferably from the control unit 15 received and then saved to perform further calculations.

The 2 shows in a flowchart a first embodiment of the method for controlling an at least partially electrically operable loader for a motor vehicle 1 with an internal combustion engine 2 ,

In a first step 500 is done by means of the control unit 15 present state variables, a stop or a shutdown of the internal combustion engine 2 detected for start / stop operation.
The start / stop operation of the motor vehicle 1 is controlled by at least two conditions. In the presence of a shutdown condition, the internal combustion engine 2 switched off and switched on again in the presence of a switch-on condition.
In this case, a switch-off condition is preferably present when the rotational speed of the internal combustion engine 2 falls below a predetermined speed threshold and / or if the motor vehicle 1 has stopped and / or the brake pedal of the motor vehicle 1 is fully or partially operated. The previously mentioned quantities are available as signals in the control unit 15 before and are stored there and further processed for calculations. The control unit 15 controls the start / stop operation of the motor vehicle 1 depending on the switch-on and switch-off condition.

In one step 510 is detected, whether after a shutdown a switch-on condition for the internal combustion engine 2 of the motor vehicle 1 is present or imminent.
For this purpose, a state variable of the motor vehicle 1 be used, such as. B. brake pedal information and / or clutch pedal information.
A switch-on condition is preferably present when the motor vehicle 1 is in a stop state, ie when the internal combustion engine 2 due to the shutdown condition was stopped and now the brake pedal is not further pressed or released. This can, for example, via the in the control unit 15 present brake pedal information can be detected. For this purpose, preferably the pedal travel of the brake pedal by the control unit 15 monitored and evaluated. A fully operated brake pedal corresponds to z. B. a value of 100% and a value of 0% corresponds to a non-actuated or released brake pedal. Alternatively or additionally, the switch-on condition may also be present when the brake pedal information signal falls below a predefinable threshold value, eg from B. 60% falls. Thus, a start or restart of the internal combustion engine 2 be predicated. This variant is particularly well suited for motor vehicles with automatic transmission.
For motor vehicles having a manual transmission, the clutch pedal information may be used for the detection of the power-on condition. Here, a value of 0% corresponds to a non-actuated clutch pedal and a value of 100% to a fully actuated clutch pedal. If now the clutch is actuated so that the clutch pedal information signal exceeds a predefinable threshold value, then the switch-on condition is present. Thus, a start or restart of the internal combustion engine 2 be predicated.

Alternatively or additionally, the detection of a Beschaltungszustand a traffic light from red to green can be used as the switch-on condition. The signal of the traffic light can preferably by means of a in the sensor unit 50 integrated video camera can be detected. Alternatively or additionally, further video cameras are around the motor vehicle 1 distributed and preferably wired or wireless with the sensor unit 50 connected. For this purpose, by means of the control unit 15 that of the sensor unit 50 transmitted video information of the video camera received and evaluated.
Alternatively, by means of the video information, the approach of one in front of the motor vehicle 1 located other motor vehicle detected. Removes the other motor vehicle, so there is a switch-on condition for the internal combustion engine 2 in front. Thus, a start or restart or startup of the internal combustion engine 2 be predicated.

Alternatively, a Car2lnfrastructure communication interface between the traffic light and the sensor unit 50 of the motor vehicle 1 be used for the Einschaltbindung. The traffic light sends her Beschaltungszustand, preferably wireless, to the located in the immediate vicinity motor vehicles. Under a Beschaltungszustand the traffic light is preferably understood the information about their current color state. Alternatively, the traffic light sends the information as a holding and passing permission. By means of a in the sensor unit 50 integrated communication interface, the wiring state of Traffic light will be received and will be through the control unit 50 stored and processed.
If the traffic light now signals a change in the wiring state from red to green, a switch-on condition exists. Thus, a start or restart of the internal combustion engine 2 be predicated.

Alternatively or additionally, a Car2Car communication between the motor vehicle 1 and another motor vehicle in the immediate vicinity can be used for the switch-on condition. This can be the motor vehicle 1 and the other motor vehicle, preferably by means of a wireless communication interface to exchange vehicle data with each other, preferably speed information, speed information, position data, route information and operating conditions of motor vehicles, such. B. On and Off information in start / stop mode. This information is provided by means of the sensor unit 50 integrated communication interface and received to the control unit 15 transferred and stored there and further processed.
Notifies the other motor vehicle, which is traveling in the same direction and / or same route that a switch-on condition from a start / stop operation is imminent, or is by means of the control unit 15 a departure or start of the other vehicle detected, so there is a switch-on condition for the internal combustion engine 2 in front. Thus, a start or restart of the internal combustion engine 2 be predicated.

In one step 520 becomes with the detection of the switch-on condition for the internal combustion engine 2 the electrically operable charger is electrically activated, so that even before an acceleration process and the actual pedaling of the gas pedal of the motor vehicle 1 compressed charge air in the air supply system 4 ready for the following combustion. Thus, sufficient compressed fresh air is available for the combustion process for the upcoming acceleration process, so that a faster and more dynamic response for the acceleration process is achieved. Thus, the existing in mechanical superchargers "turbo lag" can be eliminated. The same applies to purely electric loaders, which are activated only with the detection of the driver's request.
Alternatively or additionally, a specifiable for the electrically operable charger speed, which in the control unit 15 is stored. This is z. B. as a function of one for the motor vehicle 1 predefined vehicle mode selected. Under the vehicle mode, the known comfort functions / driving experience programs preferably the settings Sport, Race, Eco, etc. are understood.
For example, in sports mode, a speed greater than 40,000 rpm and in racer mode a speed greater than 60,000 rpm are set for the loader.

The state variables used for determining the switch-on condition can be combined individually or arbitrarily for the method.

Will be in one step 530 detects a driver's desired torque, z. B. by the evaluation of the accelerator information signal by the control unit 15 , the partially electrically operable loader is operated in a known manner and adapted the further driving and acceleration behavior.
Subsequently, the process in step 500 be started over.

The 3 shows in a flowchart a second embodiment of the method for controlling an at least partially electrically operable loader for a motor vehicle 1 with an internal combustion engine 2 ,

The steps 600 and 610 correspond to the steps 500 and 510 from the first embodiment.
In one step 620 in that, before the activation of the electrically operable charger is performed, in addition, a release condition for the activation of the electrically operable charger by means of the control unit 15 checked. If the release condition is present, in step 630 continued.

If the release condition is not present, the activation of the electrically operable charger is suppressed or temporarily suppressed until a driver request by means of z. B. an accelerator pedal information signal is detected. A value of 0% corresponds to a non-actuated accelerator pedal and a value of 100% corresponds to a fully actuated accelerator pedal. This information about the operation of the accelerator pedal can by means of a sensor on the accelerator pedal by the control unit 15 be received and evaluated. A driver request is preferably present when the gas pedal information signal exceeds a predefinable threshold value.
In the event that there is no release condition, the procedure in step 600 continued.

In a first example for determining the release condition, by means of a video system the sensor unit 50 a Beschaltungszustand one in the environment of the motor vehicle 1 be monitored located traffic lights.
The signal of the traffic light can preferably by means of a in the sensor unit 50 integrated video camera can be detected. Alternatively or additionally, further video cameras on the motor vehicle 1 to be appropriate.
The video signals determined by the video camera or video cameras are sent to the sensor unit 50 transferred and then to the control unit 15 transmit and receive. The transmission is preferably wired or wireless.
Is the switch-on condition for the internal combustion engine 2 before and the Beschaltungszustand the traffic light is preferably green or is a transition of the signal of the traffic light from red to green by the control unit 15 determined, so is the release for the activation of the electrically operable charger. If the Beschaltungszustand the traffic light, however, is red or is a transition of the signal of the traffic light from green to red by the control unit 15 has been established, there is no release for the activation of the electrically operable charger and the activation of the electrically operable charger is suppressed or temporarily suppressed until a driver's request, preferably in response to the accelerator information signal, is detected.

Alternatively or additionally, the sensor unit 50 also distance or near-field sensors such. As radar sensors, ultrasonic sensors, lidar sensors (light detection and ranging) include.

In a second example for determining the release condition, by means of at least one of the above-mentioned sensors of the sensor unit 50 one in front of the motor vehicle 1 befindlichem other motor vehicle or an obstacle are detected. The signals detected by the sensors are for this purpose to the sensor unit 50 and then to the control unit 15 , preferably wired and / or wireless, transmitted and then stored and evaluated.
Is the switch-on condition for the internal combustion engine 2 before and no motor vehicle or obstacle in front of the vehicle 1 detected, so is the release for the activation of the electrically operable charger.
Is a motor vehicle or an obstacle of the motor vehicle 1 detected, there is no release and the activation of the electrically operable charger is suppressed or temporarily suppressed until a driver's request, preferably in response to the accelerator pedal information signal, is detected.

In a third example for the determination of the release condition, the sensor unit comprises 50 a communication interface for exchanging data for Car2Car and / or Car2Infrastructure communication.
By means of the mentioned communication interfaces, motor vehicles can exchange, for example, vehicle position data, speed information, speed information, position data, route information and operating states of the motor vehicles, wiring states with one another.
For example, one of the front of the vehicle 1 in the direction of travel other motor vehicle transmits a power-on during a start / stop operation by means of the communication interface, the release for the activation of the electrically operable charger is present.
On the other hand, one is in front of the motor vehicle 1 in the direction of travel other motor vehicle transmitted an active shutdown during a start / stop operation by means of the communication interface, so there is no release for the activation of the electrically operable charger and the activation of the electrically operable charger is suppressed or temporarily suppressed to a driver's request, preferably in response to the accelerator information signal is detected.

In a fourth example for determining the release condition, the motor vehicle is located 1 at a traffic light with a current red signal or stop signal. The traffic light is equipped with a Car2Infrastructure communication unit, so that the traffic light their Beschaltungszustand with the motor vehicle 1 via the sensor unit 50 can exchange.
If there is a switch-on condition and if the signal received by the traffic light via the communication unit corresponds to the wiring state red, there is no release for the activation of the electrically operable charger and the activation of the electrically operated one Charger is suppressed or temporarily suppressed until a driver's request, preferably in response to the accelerator information signal, is detected.
On the other hand, if the wiring state of the traffic light corresponds to a green wiring state, or if the traffic light indicates a drive-through permission, there is a release for the activation of the electrically operable loader.

In a fifth example of the determination of the release condition, the sensor unit comprises 50 a, preferably wireless, communication interface with the z. B. FM signals (TMC - Traffic Message Channel) and / or mobile radio signals and / or satellite signals and / or data signals can be received from a cloud.
The received signals are preferably wired and / or wireless from the communication interface to the control unit 15 Posted. The control unit 15 receives and stores the data and can reuse it for calculations. The signals can z. B. information such. B. accumulation information and / or stowage positions.
Is determined by means of the data received via the communication unit that the motor vehicle 1 is in a traffic jam, there is no release for the activation of the electrically operable charger and the activation of the electrically operable charger is suppressed or temporarily suppressed until a driver's request, preferably in response to the accelerator information signal, is detected.

The release conditions described in the examples may be combined individually or as desired for the process.

In step 630 becomes in the presence of the switch-on condition of the step 610 and the release condition from the step 620 the partially electrically operable loader activated.
Subsequently, the process in step 600 be started over.

The 4 shows in a flowchart a third embodiment of the method for controlling an at least partially electrically operable loader for a motor vehicle 1 with an internal combustion engine 2 ,

In one step 700 is by means of the control unit 15 a stop of the motor vehicle 1 detected.
In this case, a stop of the motor vehicle is preferably present when the rotational speed of the internal combustion engine 2 falls below a predetermined speed threshold and / or the motor vehicle 1 has stopped, for example, when the speed of the motor vehicle corresponds to zero, and / or the brake pedal of the motor vehicle 1 is fully or partially operated. The previously mentioned quantities are available as signals in the control unit 15 before and are stored there and further processed for calculations.

In one step 710 is detected, whether after the stop of the motor vehicle, a startup is imminent or imminent.
For this purpose, a state variable of the motor vehicle 1 be used, such as. B. brake pedal information and / or clutch pedal information.
A starting process is preferably present when the motor vehicle 1 is in a stop state and now the brake pedal is not further pressed or released. This can, for example, via the in the control unit 15 present brake pedal information can be detected. For this purpose, preferably the pedal travel of the brake pedal by the control unit 15 monitored and evaluated. A fully operated brake pedal corresponds to z. B. a value of 100% and a value of 0% corresponds to a non-actuated or released brake pedal. Alternatively or additionally, the starting process may also be present if the brake pedal information signal falls below a predefinable threshold value of, for example, 10. B. 60% falls. Thus, the starting process or start-up can be predicted. This variant is particularly well suited for motor vehicles with an automatic transmission.

For motor vehicles having a manual transmission, the clutch pedal information may be used for the detection or prediction of the starting operation. Here, a value of 0% corresponds to a non-actuated clutch pedal and a value of 100% to a fully actuated clutch pedal. If now the clutch is actuated, so that the clutch pedal information signal exceeds a predefinable threshold value, then there is a starting operation. Thus, the starting process can be predicted.

Alternatively or additionally, a change of a Beschaltungszustand a traffic light from red to green can be used for detecting the startup. The signal of the traffic light can preferably by means of a in the sensor unit 50 integrated video camera can be detected. Alternatively or additionally, further video cameras are on the motor vehicle 1 distributed and preferably wired or wireless with the sensor unit 50 connected. For this purpose, by means of the control unit 15 that of the sensor unit 50 transmitted video information of the video camera received and evaluated. Alternatively, by means of the video information, the approach of one in front of the motor vehicle 1 located other motor vehicle detected. Removes the other motor vehicle, so there is a startup.

Alternatively, a Car2Infrastructure communication between the traffic light and the sensor unit 50 of the motor vehicle 1 be used for an upcoming startup. The traffic light sends her Beschaltungszustand, preferably wireless, to the located in the immediate vicinity motor vehicles. Under a Beschaltungszustand the traffic light is preferably understood the information about their current color state. Alternatively, the traffic light sends the information as a holding and passing permission. By means of a in the sensor unit 50 integrated communication interface, the Beschaltungszustand the traffic light can be received and is by means of the control unit 50 stored and processed.
If the traffic light now signals a change in the wiring state from red to green, a startup procedure has occurred. Thus, the starting process can be predicted.

Alternatively or additionally, a Car2Car communication between the motor vehicle 1 and be used in the immediate vicinity other motor vehicle for the starting process. This can be the motor vehicle 1 and the other motor vehicle, preferably by means of a wireless communication interface, exchange vehicle data with each other. Preferably speed information, speed information, position data, route information and operating conditions of motor vehicles, such. B. On and Switch-off information in start / stop mode. This information is provided by means of the sensor unit 50 integrated communication interface and received to the control unit 15 transferred and stored there and further processed.
Reports the other motor vehicle, which is traveling in the same direction and / or same route that a startup is imminent, or is by means of the control unit 15 a departure or start of the other vehicle detected, so there is a startup. Thus, the starting process can be predicted.

In one step 720 is electrically activated with the detection of the starting operation of the electrically operable loader, so that even before an acceleration process and the operation of the accelerator pedal of the motor vehicle 1 compressed charge air in the air supply system 4 ready for the following combustion. Thus, sufficient fresh compressed air is ready for the upcoming start-up process for the combustion process, so that a faster and more dynamic response to the acceleration process is achieved. Thus, the existing in mechanical superchargers "turbo lag" can be eliminated. The same applies to purely electric loaders, which are activated only with the detection of the driver's request.
Alternatively or additionally, a specifiable for the electrically operable charger speed, which in the control unit 15 is stored. This is z. B. as a function of one for the motor vehicle 1 predefined vehicle mode selected. Under the vehicle mode, the known comfort functions / driving experience programs preferably the settings Sport, Race, Eco, etc. are understood.
For example, in sports mode, a speed greater than 40,000 rpm and in racer mode a speed greater than 60,000 rpm are set for the loader.

The state variables used for determining the starting process can be combined individually or arbitrarily for the method.

Will be in one step 730 detects a driver's desired torque, z. B. by the evaluation of the accelerator information signal by the control unit 15 , so the partially electrically operable loader is operated in a known manner and adapted the further driving and acceleration behavior .. Subsequently, the method in step 700 be started over. Alternatively or additionally, the method of the third embodiment may be combined with the release conditions described in the second embodiment.
Ie. the electrically operable loader is only electrically activated when a starting process is predicted and additionally a release condition exists.

QUOTES INCLUDE IN THE DESCRIPTION

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Cited patent literature

• DE 102015216126 A1 [0004]

Claims (12)

Method for controlling an at least partially electrically operable loader for a motor vehicle (1) with an internal combustion engine (2), characterized in that a switch-on condition for the motor vehicle (1) during a stop state of the motor vehicle (1) in a start / stop Operation is determined by means of at least one state variable of the motor vehicle (1) that the switch-on condition predicts a start of the motor vehicle (1) and the supercharger is activated in response to the switch-on of the motor vehicle (1). Method for controlling an at least partially electrically operable loader for a motor vehicle (1) with an internal combustion engine (2), characterized in that a starting process of the motor vehicle (1) by means of at least one state variable of the motor vehicle (1) is predicted and the loader in dependence of Predictive startup of the motor vehicle (1) is activated. Method according to Claim 1 or 2 , characterized in that the at least one state variable of the motor vehicle (1) is a speed signal and / or an actuation signal of a brake pedal and / or an actuation signal of a clutch and / or a video signal of a video camera and / or a congestion information signal. Method according to Claim 1 or 2 , characterized in that depending on a predeterminable vehicle mode, in particular a sports vehicle mode or a race vehicle mode, a specifiable boost pressure for the loader is set. Method according to one of the preceding claims, characterized in that the activation of the partially electrically operable loader can be suppressed at least temporarily by means of at least one release condition of the motor vehicle (1). Method according to Claim 5 , characterized in that the at least one release condition by means of a sensor unit (50), which detects the environment around the motor vehicle (1) is determined. Method according to Claim 6 , characterized in that the sensor unit (50) comprises an image sensor and / or radar sensor and / or ultrasound sensor and / or a communication unit. Method according to Claim 5 , characterized in that the at least one release condition is determined as a function of a Car2Car or Car2Infrastructure communication signal. Method according to Claim 5 , characterized in that the at least one release condition is determined as a function of a congestion information signal. Computer program, which is adapted to a method according to one of Claims 1 to 9 perform. Electronic storage medium with a computer program after Claim 10 , Device, in particular control unit (15), which is adapted to a method according to one of Claims 1 to 9 perform.

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