publication number DE102009028369 (A1)
Release date: 2011-02-17
Inventor: RIES-MUELLER KLAUS [DE] + (RIES-MUELLER, KLAUS)
Applicant: ROBERT BOSCH GMBH [DE ] + (ROBERT BOSCH GMBH)
Classification:
International: B60K6/22; B60W10/06; B60W20/00; F02M25/08
European: B60K6/46; B60W10/06; B60W20/00
Application number: 20,090,810 DE200910028369
Priority number (s): DE200910028369 20,090,810
assumes no responsibility for the EPA the accuracy of data originating from other authorities than the EPO, and thus in particular not liable for its completeness, timeliness or fitness for a particular purpose. Information, please refer to the respective patent authorities.
translate this text description of DE 102009028369 (A1)
[0001] The present invention relates to a method for removing volatile fuel components from a memory according to the preamble of claim 1, a device for removing volatile from a memory according to the preamble of claim 8 and a method and a device for the prevention of aged fuel in a fuel tank of an electric vehicle with a range extender.
art
[0002] Increasingly, by the motor vehicle industry Motor vehicles are developed and / or manufactured, which are driven by an electric motor. The electrical energy needed to operate the electric motor to drive the electric vehicle from a disposed in the electric vehicle battery. The battery will take place during the stoppage of the electric vehicle charging on a grid. The electric vehicle in that it includes a charger. The capacity to store electrical energy the battery is limited here, so you can be reached only by the electric vehicle range in the range of about 50 km to 200 km. To enlarge the range of the electric vehicle it is provided with a so-called range extender, a combustion engine-generator unit. For longer journeys to the electric vehicle, during which the battery can be charged or not enough of a power network, is charged by the engine-generator unit, the battery and / or by the combustion engine-generator unit the electric motor, electric current is supplied. This allows the potential scope of such an electric vehicle to be enlarged with a range extender for distances up to about 600 km, which corresponds to a range of conventional motor vehicles that are driven solely by an internal combustion engine.
[0003] The operation of the electric vehicle is drawing current from the power grid much less expensive than the production of the current for the electric motor using the Range Extender. should therefore many electric vehicles, which are used mainly in urban operating at relatively short ranges, the range extender for an extended period of operation be. The fuel for the engine of the Range Extender is preserved here in a fuel tank. Devolatilization of the fuel tank, a memory for volatile fuel components of the fuel is available. If the Range Extender is not operated for a longer period, it may be an overflow or overfilling of the reservoir with volatile components of the fuel, ie essentially hydrocarbons. Furthermore, the fuel can in the fuel tank of age, so it may be a Komponentenverharzung or start trouble Range Extender. A similar problem exists for plug-in hybrid vehicles, depending on memory capacity the battery and the associated electric range.
[0004] U.S. 5,371,412 shows a method for removal of volatile fuel components from a memory to volatile fuel components of fuel for a range extender in an electric vehicle. By means of a weighing device is determined, the weight of the memory. Being exceeded a predetermined value of the weight and at a higher speed than 10 km / h of electric vehicle, the Range Extender is started to be removed by means of the intake air hydrocarbons from the memory.
disclosure of the invention
advantages of the invention
[0005] According to the Invention Removal of volatile fuel components from a memory to volatile fuel components that have escaped from a fuel tank, in one particular only, driven by an electric motor electric vehicle or plug-in hybrid vehicle with a combustion engine-generator unit as a range extender with the following steps: Start the engine-generator unit from a given value of a parameter, suction of combustion air for the combustion engine-generator unit by the storage of volatile fuel components during operation of the internal combustion engine-generator unit, so that the volatile fuel components to be reduced in the memory, Switch off the engine-generator unit, the combustion engine-generator unit independent of the speed of the electric vehicle or plug-in hybrid vehicle and / or independently by a cast of a driver's seat of the electric vehicle or plug-in is started in hybrid vehicle to reduce the volatile fuel components in the memory. A plug-in hybrid vehicle is powered by an internal combustion engine and / or an electric motor and a battery of plug-in can during a halt of the plug-in hybrid vehicles charged at a power grid in hybrid vehicle.
[0006] In particular, as a parameter the amount of volatile fuel components recorded in the memory.
[0007] In a further embodiment the amount of volatile fuel components using a sensor in or on the memory captured.
[0008] In an additional embodiment, the internal combustion engine-generator unit start and by means of a lambda probe in an exhaust pipe of the internal combustion engine-generator unit data collected, the amount of volatile fuel components identified in the memory. Here, preferably the internal combustion engine, the engine-generator unit in a speed range and / or operated in a load condition in which a good measurement of the amount of volatile fuel components in the memory means of the Oxygen Sensor is possible.
[0009] In a further embodiment, the Combustion engine-generator unit is switched off when the amount drops of volatile fuel components in the storage below a predetermined cutoff value.
[0010] Preferably, the internal combustion engine-generator unit independent of a charge state of a battery electric vehicle or plug-in hybrid vehicle to start reducing the volatile fuel components in the memory. Even with a fully charged battery, a reduction of the volatile components in the memory is required, that may be necessary even with a fully charged battery, the power of the engine-generator unit.
[0011] In a variant, the internal combustion engine-generator unit during a stoppage of the electric vehicle or plug-in hybrid vehicle to start reducing the volatile fuel components in the memory. During the arrest of the electric vehicle or plug-in hybrid vehicle comes to the users of the electric vehicle or plug-in hybrid vehicle by the operation of the internal combustion engine-generator unit in an advantageous way, no sound or smell. is
[0012] Suitably, from an environment sensor, the environment of the electric vehicle or plug-recorded in hybrid vehicle and the engine-generator unit only starts when the electric vehicle or plug-in hybrid vehicle outside is of enclosed spaces. A start of the combustion engine-generator unit in confined spaces is possible because of security and environmental reasons in general, because otherwise the exhaust gases from the combustion engine-generator unit can not be sufficiently released into the air in the atmosphere.
[0013] Inventive device for removing volatile fuel components from a memory to volatile fuel components in one particular only, driven by an electric motor electric vehicle or plug-in hybrid vehicle, comprising: a combustion engine-generator unit as a range extender, a fuel tank, a memory for volatile fuel components, at least one device for sucking of combustion air for the combustion engine-generator unit by the memory during operation of the internal combustion engine-generator unit, so that the volatile fuel components to be reduced from the memory, preferably at least one means for detecting the amount of volatile fuel components in the memory, a control unit , with a written application for protection in this procedure is executed.
[0014] According to the Invention to prevent aged fuel in a fuel tank for a combustion engine-generator unit as a range extender in one particular only, by an electric motor driven electric vehicle with the steps: the properties of the fuel in the fuel tank, starting the combustion engine-generator unit from a given value of the properties of the fuel, operation of the internal combustion engine-generator unit to the fuel in the fuel tank is at least partially consumed.
[0015] In particular, the properties of the fuel in the fuel tank from a fuel sensor detected in the fuel tank. The fuel sensor can detect aging or a gumming of the fuel, so that the properties of the fuel, in particular the aging of the fuel, which may occur.
[0016] In a further embodiment, the properties of the fuel by means of the length of time since the last refueling the fuel tank and / or the level or change the course of the level in the fuel tank and / or the course of the ambient temperature and / or the course of the fuel temperature determined. The properties of the fuel thus not be determined from a fuel sensor, but by means of an auxiliary parameter, namely, for example, the length of time since the last refueling or the level or change the course of the level in the fuel tank. This may include empirical measurements of the aging of the fuel be used in the fuel tank, for example, this time for an aging or an aging of the fuel to determine. Devices for detecting and / or investigation of the auxiliary parameters are thus at least one means for detecting the properties of the fuel.
[0017] In an additional variant, the predetermined value of the properties of the fuel at a predetermined time period of the last refueling, for example one or two months, was adopted.
[0018] In another variation, the properties of the fuel by the start of the course of combustion engine-generator unit can be determined. To determine the properties of the fuel in the fuel tank is therefore the first internal combustion engine-generator unit start and the start-start, for example, a speed-up depending on the injection amount or can detect a device and start using appropriate adaptation of this particular data collected to be closed using stored data in a database on the properties of the fuel in the fuel tank.
[0019] In a further embodiment of the user, operation of the internal combustion engine-generator unit and / or a need for filling the fuel tank will be displayed. In the electric vehicle is in this example, a corresponding display unit arranged. The driver of the electric vehicle can get to the display unit such as an optical or acoustic signal.
[0020] Inventive device for the prevention of aged fuel in a fuel tank for a combustion engine-generator unit as a range extender in one particular only, driven by an electric motor electric vehicle comprising a combustion engine-generator unit as a range extender, a fuel tank, a reservoir of volatile fuel components, at least one means for measuring the properties of the fuel in the fuel tank, a control unit, said in a written application for protection of this method is feasible.
[0021] An inventive vehicle comprises at least one is described in this application for protection device and / or at least one of the motor vehicle described in the patent registration process executable.
brief description of the drawings
[0022] In the following, an embodiment of the invention with reference to the accompanying drawings is described in more detail. It shows
[0023] 1 is a schematic system diagram of a device for removing volatile fuel components from a memory and a device for the prevention of aged fuel in a fuel tank and
[0024] 2 is a view of an electric vehicle.
embodiments of the invention
[0025] In an electric vehicle to be exclusively operated by an electric motor 6 by means of electrical energy from a battery 7, are used to extend the Range of the electric vehicle 1, a combustion engine-generator unit 10 is used. A similar problem exists for plug-in hybrid vehicles 1, depending on the storage capacity of the battery 7 and thus the electric range. By means of the internal combustion engine-generator unit 10 as a so-called range extender 10 is generated using fuel from a fuel tank 8 mechanical energy from a combustion engine 25, which is converted by a generator 26 into electrical energy. By means of electrical energy from the generator 26, either the battery charged 7 or operated the electric motor 6. Thus, the range of the electric vehicle 1 can significantly, for example, on ranges in the range of about 300 km to 600 km, extended be. The range of the electric vehicle 1 by means of electrical energy from the battery 6 is for example in the range of 50 km to 150 km. As the energy for traction or to drive the electric vehicle 1 from a power grid, by means of which the battery is charging 7 at a stoppage of the electric vehicle 1, much cheaper than the energy from the combustion engine-generator unit 10, the user of the electric vehicle 1 in general, the internal combustion engine-generator unit 10 is started only very rarely. This occurred, in particular with a predominant use of the electric vehicle 1 in urban areas or over short distances, periods of more than one or two months, during which the internal combustion engine-generator unit is not on 10th
[0026] The internal combustion engine 25 through an intake manifold 16 draws in air from an environment 27 of the electric vehicle 1. A not shown combustion chamber of the engine 25, which is designed, for example, as Hubkolbenverbrennungskraftmaschine with two cylinders, is fed by a fuel line 9 from a fuel tank 8 fuel. The exhaust gases from the combustion engine 25 are discharged through an exhaust pipe 13 to the surroundings 27 of the electric vehicle 1. The mechanical energy of the engine 25 is converted by the generator 26 into electrical energy. The fuel in the fuel tank 8 includes volatile fuel components, in particular hydrocarbons. When filling the fuel tank 8 or for example in a stronger heating of the fuel tank 8, this volatile gaseous fuel components connect to a greater extent in the fuel tank 8 and a Tankentgasungsleitung 17, supplied to a memory 11 for the volatile and gaseous fuel components. The memory 11 is particularly designed as activated carbon filters. In the activated carbon of the memory 11 this volatile fuel components are picked up or absorbed, so that these reach the environment 27 of the electric vehicle 1. A volume expansion in the fuel tank 8 and 17 can Tankentgasungsleitung here by an opening 24 by memory are given 11 to the environment. With an increase in volume thus gas flows through the memory 11 and from the opening 24 out, with the volatile fuel components are absorbed by the activated carbon in the memory 11.
[0027] A device 2 for removal of volatile fuel components from the memory 11 is shown in Figure 1. The memory 11 is through line 19 as a storage device 18 for sucking air from the reservoir 11 to the suction pipe 16 is connected. Further, the device 2 means 15 for detecting the amount of volatile fuel components in the memory 11. For this, the memory 11 is provided with a sensor 12. The memory 11 arranged in the sensor 12 detects the amount of volatile fuel components in the memory 11. Also arranged in the exhaust pipe 13, a Oxygen Sensor 14th Using data from the sensor 12 and / or measured by the Oxygen Sensor 14 Data capture can determine a control unit 23, the amount of volatile fuel components in the memory 11 or. Is the amount greater of volatile fuel components in the memory 11 as a predetermined value, the internal combustion engine-generator unit 10 is started by the control unit 23 and opens a valve 20 in the storage line 19. This flows through the intake pipe 16 not only air from the surroundings 27 of the electric vehicle 1, but air from the surroundings 27 of the electric vehicle 1, which flows through the opening 24 in the memory 11, then through the storage line 19 and then flows into the intake manifold 16 due to the negative pressure in the intake manifold 16th Through this opening 24 in the air introduced into the memory 11 with activated carbon, the amount of volatile fuel components in memory 11 is reduced because the intake and receiving through the activated carbon filter air led the volatile fuel components.
[0028] The electric vehicle 1 is further provided with an environment sensor 5 (2). By means of the environment sensor 5 can be detected, the environment 27 of the electric vehicle 1. the electric vehicle 1 is in a confined space, ie, such as the distance from objects above the electric vehicle 1 is smaller than a predetermined Setpoint will not start the engine-generator unit 10 for removal of volatile fuel components from the memory 11. The engine-generator unit 10 is thus always started when both the one hand, the electric vehicle 1 outside a closed space is on the other hand, the amount of volatile fuel components in the memory 11 is greater than a predetermined value. A secure and reliable reduction of the volatile fuel components in the memory 11 is ensured because even if a stoppage of the electric vehicle 1 and not only when driving the electric vehicle 1, a reduction of volatile fuel components 11 in the memory 11 is. It is of course the electric vehicle 1 while driving in general outside of a closed space, so that these default settings while driving the electric vehicle 1, a reduction of volatile fuel components in the memory 11 possible by means of the internal combustion engine-generator unit 10.
[0029] The electric vehicle 1 also includes means 21 for recording the properties of the fuel in the fuel tank 8. For this purpose the fuel tank 8, a fuel sensor 22 arranged to detect the properties of the fuel. Is exceeded by the fuel sensor 22, a predetermined value of the properties of the fuel, ie does a given aging of the fuel, such as a Kraftstoffverharzung on, the internal combustion engine-generator unit 10 is turned on until the fuel is spent entirely in the fuel tank 8. In addition, is indicated by a display unit not shown to the user of the electric vehicle 1, when demand for refueling the fuel tank 8 is. Here, the internal combustion engine-generator unit 10 is for the consumption of fuel to be used only in operation when the electric vehicle 1 is outside of enclosed spaces. The electric vehicle 1 also possesses a device 3 for the avoidance of aged fuel in the fuel tank 8 for the internal combustion engine-generator unit 10. As a means 21 for detecting the properties of the fuel in the fuel tank can also be used to control unit 23rd As to the control unit 23 a predetermined time period since the last refueling, for example, entered two months. If more than two months have passed since the last refueling the fuel tank 8 is assumed that the aging of the fuel in the fuel tank 8 and the internal combustion engine-generator unit 10 used for the consumption of fuel in use. In an analogous manner to the device 2 even when the device 3 to the user of the electric vehicle 1, the need for filling the fuel tank 8 is displayed.
[0030] are the whole, with the inventive device 2, and 3 major advantages connected. The engine-generator unit 10 regardless of the speed of the electric vehicle 1 and / or occupation of a driver's seat 4 of the electric vehicle 1 can be operated with a driver, that is, for example, an operation of the internal combustion engine-generator unit 10 during the stoppage of the electric vehicle 1 is possible. The engine-generator unit 10 is not also used to reduce volatile fuel components in the fuel tank 8, but also to avoid extremely outdated fuel in the fuel tank 8. This can advantageously prevent damage to 10 because of the aging of the fuel components in the engine-generator unit.
QUOTES INCLUDED IN THE DESCRIPTION
[0031] This list of references cited by the applicant was automatically generated and is intended solely to improve the reader's included. The list is not part of the German patent or utility model. The DPMA is not responsible for any errors or omissions.
cited patent literature
[0032]
- U.S. 5,371,412 [0004]
method and apparatus for removing volatile fuel components from a memory
Technical and scientific Übersetzungen
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