Motor vehicle with a tank mode

Abstract

The invention relates to a motor vehicle. The motor vehicle has an internal combustion engine (1) for driving the motor vehicle and an electric motor (2) for driving the motor vehicle. The motor vehicle has a high-voltage electrical system (3), a high-voltage battery (4) is connected to the high-voltage electrical system (3), the electric motor (2) is connected to the high-voltage electrical system (3), and at least one further consumer (5) is connected to the high-voltage electrical system (3), the further consumer (5) being supplied with electrical energy via the high-voltage electrical system (3) to operate the consumer (5). The motor vehicle is operable in a combustion mode and in a refueling mode, wherein refueling of a fuel tank (9) of the motor vehicle is enabled in the refueling mode. The combustion engine (2) is activated in the combustion mode and deactivated in the refueling mode.wherein in the refueling mode, the high-voltage on-board network (3) is supplied with electrical energy via the high-voltage battery (4) for operating the further consumer (5), wherein the motor vehicle has a control system (6), wherein the control system (6) is configured to receive a refueling request signal (7), wherein the control system (6) is configured to cause the motor vehicle to switch to the refueling mode upon receipt of the refueling request signal (7).

Description

The invention relates to a motor vehicle having a tank mode, wherein a fuel tank of the motor vehicle is permitted to be filled in the tank mode.For safety reasons, it is advantageous, when refueling a fuel tank of the motor vehicle that has an internal combustion engine, to deactivate the internal combustion engine, to this extent to switch it off. Switching off the internal combustion engine generally has the result that further consumers of the motor vehicle, such as components of an infotainment system and / or an air-conditioning device for air-conditioning an interior of the motor vehicle, are likewise deactivated or are no longer supplied with energy. The persons remaining in the vehicle then generally have no possibility of utilizing comfort functions, for example infotainment and / or air conditioning. As a result, the vehicle user often leaves the internal combustion engine activated, which can lead to a potential risk.Hybrid vehicles, insofar as motor vehicles which have both an internal combustion engine and an electric motor for driving the motor vehicle, are frequently equipped with a fuel tank designed as a pressure tank. To tank the pressure tank, it is necessary to vent the pressure tank and thus reduce the overpressure. During the tank pressure reduction, increased fuel outgassing in the fuel tank occurs at high fuel temperatures. This can result in strong vapor bubble formation in a low pressure pump. The low-pressure pump may then no longer be able to deliver sufficient fuel. As a result, the fuel supply at the high pressure pump may break down, which may result in catalyst-damaging dropouts in an active internal combustion engine.DE 10 2015 110 932 A1 describes a system and a method for blocking engine operation during refueling. The method described in DE 10 2015 110 932 A1 comprises detecting whether a refueling event takes place and disabling the operation of the internal combustion engine when the refueling event takes place. The detecting whether the refueling event occurs further comprises at least one of (1) detecting a pressure within a fuel tank, (2) detecting whether a door to a fuel tank is opened, or (3) detecting whether a fuel cap has been detached from the fuel tank. The system described in DE 10 2015 110 932 A1 comprises a controller which is configured to execute the method. DE 10 2006 054 669 A1 and DE 10 2018 109 123 A1 disclose further prior art.It is known from an internal state of the art to deactivate the internal combustion engine before refueling, wherein this is generally carried out via a terminal control connected to the ignition starter switch, such that the terminal control opens the so-called terminal 15, which corresponds in a closed state to a state "ignition on", whereby the state "ignition off" is achieved. This has the consequence, even in hybrid vehicles, that the high-voltage battery is disconnected from the high-voltage on-board electrical system, so that consumers connected to the high-voltage on-board electrical system are no longer supplied with electrical energy via the high-voltage on-board electrical system and are therefore likewise deactivated. As a result, functions provided by the further consumer, for example possible comfort functions, are no longer available to the occupants of the motor vehicle.It is an object of the present invention to specify a motor vehicle which overcomes the present problem.This object is achieved by a motor vehicle which has the features of claim 1. The dependent claims relate to advantageous further developments.The motor vehicle according to the invention has both an internal combustion engine for driving the motor vehicle and an electric motor for driving the motor vehicle. In this respect, the motor vehicle is in particular a hybrid vehicle. It is provided that the motor vehicle has a high-voltage on-board electrical system, wherein a high-voltage battery is connected to the high-voltage on-board electrical system, wherein the electric motor is connected to the high-voltage on-board electrical system, and wherein at least one further consumer is connected to the high-voltage on-board electrical system, wherein the further consumer is supplied via the high-voltage on-board electrical system with electrical energy, in particular with a supply voltage, for operating the consumer, wherein the motor vehicle can be operated in a burner mode and in a tank mode, wherein in the tank mode refueling of a fuel tank of the motor vehicle is made possible, wherein in the burner mode the internal combustion engine is activated and wherein in the tank mode the internal combustion engine is deactivated, wherein in the tank mode the high-voltage on-board electrical system is supplied via the high-voltage battery with electrical energy for operating the further consumer, wherein the motor vehicle has a control system, wherein the control system is configured to receive a refueling request signal, wherein the control system is configured to cause the motor vehicle to change to the refueling mode upon receiving the refueling request signal.On account of the configuration according to the invention, functions of the one or more further consumers can also be used in the tank mode, since said consumer or consumers are still supplied with electrical energy via the high-voltage on-board electrical system. The one or more further consumers can be, in particular, consumers which provide comfort functions for the occupants of the motor vehicle, for example bring about air conditioning of the interior, and / or serve for entertainment of the vehicle occupants, for example for outputting audio contents or audio-visual contents.It is considered to be particularly advantageous if the control system is configured to cause the motor vehicle to change from the combustor mode to the tank mode without interrupting the energy supply of the high-voltage vehicle electrical system upon receipt of the tank request signal during operation of the motor vehicle in the combustor mode. Such a configuration is to be considered advantageous in that the functions of the further consumer relevant to the occupants are maintained unchanged when the motor vehicle changes into the tank mode.In a particularly preferred embodiment, it is provided that the electric motor is active in the combustion mode, so that a purely electric driving of the motor vehicle is made possible in the tank mode. Such a configuration is to be considered advantageous in that driving of the motor vehicle is still possible even in the refueling mode, for example in order to change a fuel pump at a gas station and / or to remove the motor vehicle from the fuel pump, for example in order to put it down into a nearby parking space after the refueling process has taken place, without to activate the internal combustion engine, in this respect to starting. Furthermore, this configuration has the advantage that, if appropriate, an operating mode already provided in the control of the motor vehicle, namely a purely electrical operating mode, can also be used advantageously for the tank mode.It is provided that the motor vehicle has an operating interface that can be operated by a user of the motor vehicle, wherein the operating interface is connected to the control system by signal technology, wherein the desired fuelling signal is generated by the operating interface by carrying out an operating action by the user of the motor vehicle. The operating interface can be, for example, an actuatable switch, in particular a button. The operator interface is preferably arranged in a region of the motor vehicle assigned to the driver of the motor vehicle, for example on an inner side of a driver's door.Preferably, the operating interface is not identical to an ignition starter switch or ignition lock.The motor vehicle preferably comprises a tank request switch which generates the tank request signal upon actuation and a separate ignition starter switch which, upon actuation, brings about a connection of the high-voltage battery from the high-voltage vehicle electrical system and / or brings about a disconnection of the high-voltage battery from the high-voltage vehicle electrical system and / or brings about an activation, in particular a starting, of the internal combustion engine and / or brings about a deactivation, in particular a stopping, of the internal combustion engine. As a result, a separate operating element is available, which is to be operated in the event of a refueling request in order to enable refueling. This prevents incorrect operation, for example an undesired interruption of the voltage supply of the high-voltage vehicle electrical system.It is considered to be particularly advantageous if the fuel tank is designed as a pressure tank.In connection with a pressure tank, it is considered to be particularly advantageous if, when changing to the tank mode, a venting device of the pressure tank is activated, wherein an overpressure prevailing in the pressure tank is reduced via the venting device via a filter device, in such a way that the pressure reduction takes place during or after deactivation of the internal combustion engine. Because the internal combustion engine is already deactivated before or while the overpressure prevailing in the pressure tank is reduced, insufficient supply of fuel to the internal combustion engine is avoided.It is considered to be particularly advantageous if the at least one further consumer comprises at least one of the following:at least one component of an air conditioning device for air conditioning an interior of the motor vehicle,a high-voltage compressor of an air conditioning device for air conditioning an interior of the motor vehicle,at least one component of an infotainment system of the motor vehicle.In the following figures, the invention is explained in more detail on the basis of an exemplary embodiment, without being restricted to this. The following are shown: FIG. 1 shows a schematic illustration of components of a motor vehicle according to the invention.FIG. 1 shows components of a motor vehicle according to the invention in a schematic illustration. The motor vehicle has an internal combustion engine 1 for driving the motor vehicle and an electric motor 2 for driving the motor vehicle. The motor vehicle furthermore has a high-voltage on-board electrical system 3, wherein a high-voltage battery 4, which serves for supplying voltage to the high-voltage on-board electrical system 3, is connected to the high-voltage on-board electrical system 3. The electric motor 2 is connected to the high-voltage on-board electrical system 3. At least one further load 5, which in the present case is an air conditioning compressor of an air conditioning device operated with high voltage for air conditioning an interior of the motor vehicle, is connected to the high-voltage on-board electrical system 3 and is supplied with electrical energy via a supply voltage provided by the high-voltage battery 4. It is quite conceivable that the voltage directly provided by the high-voltage battery 4 is converted into a supply voltage suitable for the load 5, for example via suitable DC converters and / or suitable AC-DC converters.The motor vehicle is operable in a combustion mode and in a tank mode, wherein a fuel tank 9 of the motor vehicle is permitted to be filled in the tank mode. It is provided that the internal combustion engine 1 is activated in the combustion mode, for example the internal combustion engine 1 is running and / or it can be started. In the tank mode, on the other hand, the internal combustion engine 1 is deactivated, for example the internal combustion engine 1 is switched off and / or starting of the internal combustion engine 1 is not possible. Furthermore, it is provided that, in the tank mode, the high-voltage on-board electrical system 3 is supplied with electrical energy via the high-voltage battery 4 for operating the further consumer 5.The motor vehicle comprises a control system 6, wherein the control system 6 is configured to receive a refueling request signal 7, wherein the control system 6 is configured to cause the motor vehicle to change to the refueling mode upon receipt of the refueling request signal 7. For generating and transmitting the fuel request signal 7 to the control system 6, the motor vehicle has a fuel request switch 8 that can be actuated by a user of the motor vehicle. The fuelling request switch 8 is connected to the control system 6 by signal technology, wherein the fuelling request signal 7 is generated by carrying out an operating action by the user of the motor vehicle on the fuelling request switch 8 and is transmitted to the control system 6.List of reference characters1 Internal combustion engine 2 Electric motor 3 High-voltage vehicle electrical system 4 High-voltage battery 5 Loads 6 Control system 7 Desired gas pump signal 8 Desired gas pump switch 9 Fuel tank

Claims

Motor vehicle, wherein the motor vehicle has an internal combustion engine (1) for driving the motor vehicle and an electric motor (2) for driving the motor vehicle, wherein the motor vehicle has a high-voltage on-board electrical system (3), wherein a high-voltage battery (4) is connected to the high-voltage on-board electrical system (3), wherein the electric motor (2) is connected to the high-voltage on-board electrical system (3), and wherein at least one further consumer (5) is connected to the high-voltage on-board electrical system (3), wherein the further consumer (5) is supplied with electrical energy via the high-voltage on-board electrical system (3) for operating the consumer (5), wherein the motor vehicle can be operated in a burner mode and in a tank mode, wherein a fuel tank (9) of the motor vehicle is made possible in the tank mode, wherein the internal combustion engine (2) is activated in the combustion mode and wherein the internal combustion engine (2) is deactivated in the tank mode, wherein the high-voltage on-board electrical system (3) is supplied with electrical energy via the high-voltage battery (4) in the tank mode for operating the further consumer (5), wherein the motor vehicle has a control system (6), wherein the control system (6) is configured to receive a tank request signal (7), wherein the control system (6) is configured to cause the motor vehicle to change to the tank mode upon receipt of the tank request signal (7), wherein the motor vehicle has an operating interface which can be operated by a user of the motor vehicle, wherein the operating interface is connected to the control system (6) in terms of signal technology, wherein the tank request signal (7) is generated by the operating interface by carrying out an operating action by the user of the motor vehicle.Motor vehicle according to Claim 1, wherein the control system (6) is configured, when the motor vehicle is operating in the combustion mode, to cause the motor vehicle to change from the combustion mode to the tank mode without interrupting the energy supply of the high-voltage on-board system (3) upon receipt of the tank request signal (7).Motor vehicle according to claim 1 or 2, wherein in the combustion mode the electric motor (2) is active, so that a purely electric driving of the motor vehicle is possible in the tank mode.Motor vehicle according to one of Claims 1 to 3, wherein the operator interface is an actuatable switch.Motor vehicle according to one of Claims 1 to 4, wherein the fuel tank (9) is designed as a pressure tank.Motor vehicle according to Claim 5, wherein, when the tank mode is changed to, a venting device of the pressure tank is activated, wherein an overpressure prevailing in the pressure tank is reduced via a filter device via the venting device, in such a way that the pressure reduction takes place during or after deactivation of the internal combustion engine (1).Motor vehicle according to one of Claims 1 to 6, wherein the at least one further consumer (5) comprises at least one of the following: - at least one component of an air-conditioning device for air-conditioning an interior of the motor vehicle, - a high-voltage compressor of an air-conditioning device for air-conditioning an interior of the motor vehicle, - at least one component of an infotainment system of the motor vehicle.

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