WO2008095513A1 - Method and apparatus for operating a vehicle with a hybrid drive - Google Patents

Method and apparatus for operating a vehicle with a hybrid drive Download PDF

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Publication number
WO2008095513A1
WO2008095513A1 PCT/EP2007/001103 EP2007001103W WO2008095513A1 WO 2008095513 A1 WO2008095513 A1 WO 2008095513A1 EP 2007001103 W EP2007001103 W EP 2007001103W WO 2008095513 A1 WO2008095513 A1 WO 2008095513A1
Authority
WO
WIPO (PCT)
Prior art keywords
vehicle
characterized
expected
operating
roadway section
Prior art date
Application number
PCT/EP2007/001103
Other languages
German (de)
French (fr)
Inventor
Andreas Knoop
Original Assignee
Daimler Ag
Ford Global Technologies, Llc
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Daimler Ag, Ford Global Technologies, Llc filed Critical Daimler Ag
Priority to PCT/EP2007/001103 priority Critical patent/WO2008095513A1/en
Publication of WO2008095513A1 publication Critical patent/WO2008095513A1/en

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Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B60VEHICLES IN GENERAL
    • B60WCONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
    • B60W20/00Control systems specially adapted for hybrid vehicles
    • B60W20/10Controlling the power contribution of each of the prime movers to meet required power demand
    • B60W20/12Controlling the power contribution of each of the prime movers to meet required power demand using control strategies taking into account route information
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B60VEHICLES IN GENERAL
    • B60KARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
    • B60K6/00Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00
    • B60K6/20Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00 the prime-movers consisting of electric motors and internal combustion engines, e.g. HEVs
    • B60K6/22Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00 the prime-movers consisting of electric motors and internal combustion engines, e.g. HEVs characterised by apparatus, components or means specially adapted for HEVs
    • B60K6/32Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00 the prime-movers consisting of electric motors and internal combustion engines, e.g. HEVs characterised by apparatus, components or means specially adapted for HEVs characterised by the fuel cells
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B60VEHICLES IN GENERAL
    • B60WCONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
    • B60W10/00Conjoint control of vehicle sub-units of different type or different function
    • B60W10/24Conjoint control of vehicle sub-units of different type or different function including control of energy storage means
    • B60W10/26Conjoint control of vehicle sub-units of different type or different function including control of energy storage means for electrical energy, e.g. batteries or capacitors
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B60VEHICLES IN GENERAL
    • B60WCONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
    • B60W40/00Estimation or calculation of non-directly measurable driving parameters for road vehicle drive control systems not related to the control of a particular sub unit, e.g. by using mathematical models
    • B60W40/02Estimation or calculation of non-directly measurable driving parameters for road vehicle drive control systems not related to the control of a particular sub unit, e.g. by using mathematical models related to ambient conditions
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B60VEHICLES IN GENERAL
    • B60WCONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
    • B60W20/00Control systems specially adapted for hybrid vehicles
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B60VEHICLES IN GENERAL
    • B60WCONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
    • B60W2520/00Input parameters relating to overall vehicle dynamics
    • B60W2520/10Longitudinal speed
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B60VEHICLES IN GENERAL
    • B60WCONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
    • B60W2540/00Input parameters relating to the driver
    • B60W2540/30Driving style
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B60VEHICLES IN GENERAL
    • B60WCONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
    • B60W2550/00Input parameters relating to exterior conditions
    • B60W2550/14Road conditions, road types or road features
    • B60W2550/143Road profile
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B60VEHICLES IN GENERAL
    • B60WCONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
    • B60W2550/00Input parameters relating to exterior conditions
    • B60W2550/20Traffic related input parameters
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02TCLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T90/00Enabling technologies or technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02T90/30Application of fuel cell technology to transportation
    • Y02T90/34Fuel cell powered electric vehicles [FCEV]

Abstract

The invention relates to a method and a device for operating a vehicle with a hybrid drive, in which power for operating the hybrid drive is extracted at least at certain times from a main power supply (11) and/or an electrical auxiliary energy store (12), wherein the proportion of energy extracted from the electrical auxiliary energy store (12) is adapted as a function of an altitude profile which is anticipated along a section of carriageway lying ahead. According to the invention, the maximum speed of the vehicle which is to be expected when the section of carriageway lying ahead is travelled along is additionally taken into account.

Description

Method and device for operating a vehicle with a hybrid drive

The invention relates to a method and apparatus for operating a vehicle with a hybrid drive, in which a main power supply and / or an auxiliary electric energy storage device is at least temporarily removed energy for operating the hybrid drive system, wherein the proportion of the extracted from the auxiliary electrical energy store energy as a function an expected along a forward roadway section height profile is fit reasonable.

Such a method for a vehicle with a hybrid drive is shown in the DE 101 28 758 Al. The hybrid drive, comprising in addition to an internal combustion engine which is operated using fuel from a fuel tank further comprises an electric motor which is operated by the use of electrical energy on the part of a through the internal combustion engine driven electrical generator and / or a rechargeable battery or an accumulator. For the coordination of the hybrid drive, a control device is provided, the information of a satellite-assisted navigation system to calculate an expected along a forward roadway section height profile to be supplied. Here, the control means to match the proportion of the electrical energy which is taken from the battery for driving the electric motor in dependence of the expected height profile such that the currently available battery capacity can be exploited without falling below a predetermined minimum state of charge. This not only leads to improved fuel consumption by the internal combustion engine, but also to an increase in the lifetime of the battery used.

Object of the present invention is to improve a method of the type mentioned in the sense of a further improvement of the efficiency of the hybrid drive.

This object is achieved by a method having the features of claim 1.

In the method for operating a vehicle with a hybrid drive of a main power supply and / or an auxiliary electric energy storage device is at least temporarily removed energy for operating the hybrid drive system, wherein the proportion of the extracted from the auxiliary electrical energy store energy as a function of an expected along a forward roadway section height profile reasonable will fit. According to the invention an expected when driving of the forward roadway section speed is additionally taken into account, whereby a more accurate prediction of the available for operating the electric motor battery capacity is possible. The use of power from the main power storage can be reduced as to a necessary minimum.

Advantageous embodiments of the method according to the invention will be apparent from the dependent claims.

For reliable estimation of the expected speed information is used preferably, which are designed such that they allow to draw conclusions on possible restrictions on the travel speed along the forward roadway section. The extraction DIE ser information can internally vehicle there and / or carried out externally vehicle.

Thus, there is a possibility that the expected maximum speed of the vehicle based on an aggregation at forward roadway section weather information, for example, an external temperature or rainfall detected by sensors, and / or related to the forward roadway section traffic information, for example a transferred by radio stowage and danger message, and / or distance information which shows a sensor-detected distance to a preceding vehicle, is estimated. By analyzing such information, it is possible to detect the density of traffic expected along the forward roadway section and consequent restrictions on travel speed early.

Additionally or alternatively, route-related information representing the route of the forward roadway section and / or driver-specific information reflecting the driver's driving behavior, are included.

The particular route can in this case to draw conclusions about the road class (inner-city street, highway, national road or highway), construction and danger areas, traffic areas and associated restrictions on the travel speed.

To obtain the driver-specific information, the driver-side operating characteristic of an accelerator or brake pedal and a steering of the vehicle is provided for steering the control element is evaluated. Since the respective operating characteristic provides an indication relating to the expected vehicle dynamics can specify going on the prediction of the available for operating the electric motor battery capacity on the basis of the driver-specific information.

The inventive method is explained in detail below with reference to the accompanying drawings. The single figure shows an embodiment of an apparatus for performing the method according to the invention.

Conventional hybrid drives, such as are known for example from the prior art comprise a conventional internal combustion engine which is operated by supplying fuel from a fuel tank, wherein an additional E- is lektromotor provided, which by means of energy from an e- lektrischen energy storage, in particular is supplied to a rechargeable battery or an accumulator.

Notwithstanding, it should be in this case a vehicle, the electric drive 10 is operated by means of an environmentally friendly fuel cell system. 11 In addition, an electrical energy storage device is present in the form of a rechargeable battery or an accumulator 12th In the electric drive 10 is a memory coupled to the drive wheels of the vehicle electric motor, which can operate in push or brake operation of the vehicle as an electric generator to recharge the electrical energy store 12, so consequently the recuperation of removed electric power. Such coasting occurs, for example in case of a downhill.

The fuel cell system 11 itself is of conventional design and includes a fuel cell 13, the electric power by electrochemical reaction of a gaseous O- xidationsmittels with a fuel gas generated. The fuel cell 13 is, for example according to the type of a so-called HydrauMind (Polymer Exchange Membrane Fuel Cell) and a so-called PEFC (Polymer Electrolyte Fuel Cell).

13 Accordingly, the fuel cell has an anode flow field 13 and a cathode flow field 13b which are separated by an electrolyte in the form of a polymer membrane. The polymer membrane is coated on both sides with a catalytically active electrode material which consists mainly of graphite with admixtures of platinum.

To operate the fuel cell 13 the anode flow field 13 through an anode inlet line 14, a hydrogen-containing fuel gas 15 is fed, which is provided on the part of a high-pressure tank or a reformer. In the hydrogen-containing fuel gas 15 may be pure hydrogen gas.

The fuel cell system 11 is switched off, the anode inlet conduit 14 is blocked by means of an electromagnetic valve 16 in order to avoid an undesired release of hydrogen gas into the environment.

The resulting in the anode flow field 13a anode exhaust stream is discharged through an anode outlet 20 either directly to atmosphere or at least partly returned through a Anodenspülleitung 21, which opens into the anode inlet line 14 of the fuel cell 13 into the anode flow field 13a. The volume flow of the recycled anode exhaust gas stream can be controlled by means of an arranged in the A- nodenspülleitung 21 electrical throttle valve 22nd

At the same time the cathode flow field 13b is Thode inlet conduit 23 via a Ka an oxygen-containing oxidising agents 24 supplied in the form of compressed air. The com- optimization of the air is removed via an air filter system from the outside atmosphere takes place here by means of an electrically operated compressor 25a. The air filter system includes a muffler to reduce compressor noise, inter alia, in addition to a chemical and / or mechanical particulate filter. The resulting in the cathode chamber 13b during operation of the fuel cell 13 containing water vapor cathode exhaust stream is then passed over a Kathodenauslasslei- tung led out 26 via a compressor connected to the expander 25a 25b relaxed and to the environment.

In order to cool the fuel cell 13, a cooling device is further provided 13c. The cooling device 13c is connected to a coolant circuit 30 comprising an electrically driven pump 31 for circulating a circulating in the refrigerant circuit 30 refrigerant. The resulting during operation of the fuel cell 13 is discharged through a process heat contained in the coolant circuit 30 radiator 32 to the environment.

For the coordination of the hybrid drive a central control device 40 is provided, of the information of a satellite-assisted navigation system 41 to calculate an expected along a forward roadway section height profile to be supplied. the controller 40, at that the currently available battery capacity is exhausted without falling below a recommended minimum state of charge in this case adjusts the proportion of the electrical energy which is taken from the battery 12 for operating the electric motor 10 in dependence of the expected height profile so.

The central control device 40 also takes into account an expected when driving of the forward roadway section speed of the vehicle, to which attracts these different vehicle internal or external to information obtained which are designed such that these conclusions about possible limitations on the traveling speed of the vehicle along the forward roadway portion allow.

According to the example, the central controller 40 estimates the expected maximum speed of the vehicle based on an aggregation at forward roadway section weather information, when it is detected by a means of a temperature sensor 42 and a rain sensor 43 outside temperature or rainfall, and / or to the forward roadway section-related traffic information in the form of a transmitted by radio 44 to the central controller 40 congestion and danger message and / or distance information, which represents a detected by means of a distance sensor 45 distance to a preceding vehicle.

Is to be expected with correspondingly low maximum speed in the event of high traffic density due to a jam in connection with weather-related impairments (icy road surface or limited visibility due to heavy rainfall in the form of snow or rain).

Additionally or alternatively, the central controller 40 refers in the estimation of the expected speed of the vehicle route-related information that reflect the route of the forward roadway section, and / or driver-specific information representing the driving behavior of the respective driver, with a.

The particular route can hereby conclusions on the class of road (urban street, highway, national road or highway), construction and hazardous points, traffic areas and associated limitations on the speed of travel to and from the central control inputs direction 40 on the basis of the part of the navigation system 41 information provided determined.

To obtain the driver-specific information, the central controller 40 evaluates the means of corresponding Wegbzw. Force sensors 50, 51 and 52 detected driver-side operating characteristic: an accelerator pedal 53, a brake pedal 54 and an intended for steering the vehicle steering operating element 55 from. In the steering operation element 55 is, for example according to a conventional steering wheel. The driver-specific information is provided in this case, evidence of the expected vehicle dynamics, so that a further clarification of predicting of operating the E lektromotors 10 available battery capacity is possible.

LIST OF REFERENCE NUMBERS

Figure imgf000011_0001

Claims

claims
1. A method for operating a vehicle with a hybrid drive, in which a main power supply (11) and / or an auxiliary electrical energy store (12) at least temporarily, energy is extracted for operating the hybrid drive, with removed the percentage of out of the auxiliary electric energy storage (12) Energy is adjusted as a function of an expected along a forward roadway section height profile, characterized in that in addition an expected when driving of the forward roadway section speed of the vehicle is taken into account.
2. The method according to claim 1, characterized in that the expected maximum speed based on a related to the forward roadway section Weather information is estimated.
3. The method according to claim 1, characterized in that it is estimated the expected maximum speed based on a related to the forward roadway section traffic information.
4. The method according to claim 1, characterized in that the expected maximum speed is based on a distance information representing a distance to a preceding vehicle estimated.
5. The method according to claim 1, characterized in that the expected maximum speed on the basis of route-related information representing the route of the forward roadway section, is estimated.
6. The method according to claim 1, characterized in that in addition driver-specific information representing the driving behavior of the driver are taken into account.
7. A device for operating a vehicle with a hybrid drive, in which a main power supply (11) and / or an auxiliary electrical energy store (12) at least temporarily, energy is extracted for operating the hybrid drive, wherein a control device (40) the proportion of from the auxiliary electric power storage (12) extracted energy as a function of an expected along a forward roadway section adjusts the height profile, characterized in that the control unit (40) additionally takes into account an expected when driving of the forward roadway section speed of the vehicle.
8. The device according to claim 8, characterized in that it is in the main power supply to a fuel cell system (11) for generating electrical energy.
PCT/EP2007/001103 2007-02-09 2007-02-09 Method and apparatus for operating a vehicle with a hybrid drive WO2008095513A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PCT/EP2007/001103 WO2008095513A1 (en) 2007-02-09 2007-02-09 Method and apparatus for operating a vehicle with a hybrid drive

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/EP2007/001103 WO2008095513A1 (en) 2007-02-09 2007-02-09 Method and apparatus for operating a vehicle with a hybrid drive

Publications (1)

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WO2008095513A1 true WO2008095513A1 (en) 2008-08-14

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Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19937381A1 (en) * 1999-08-07 2001-03-22 Daimler Chrysler Ag Motor vehicle with hybrid drive has event detector generating signals identifying external event; control signal affecting engine and/or motor can be generated depending on event signal
US6230496B1 (en) * 2000-06-20 2001-05-15 Lockheed Martin Control Systems Energy management system for hybrid electric vehicles
DE10128758A1 (en) 2001-06-13 2002-12-19 Bosch Gmbh Robert Control system for hybrid vehicle regulates proportion of driving power performed by electric motor whereby state of charge of battery does not fall below minimum level ensuring basic functions
DE10323722A1 (en) * 2003-05-24 2004-12-09 Daimlerchrysler Ag Engine output divide factor determination method between power produced by fuel converter and electric motor of hybrid vehicle, determines adaptive equivalence factor for weighting electrical energy consumption value
US20050228553A1 (en) * 2004-03-30 2005-10-13 Williams International Co., L.L.C. Hybrid Electric Vehicle Energy Management System
DE102005024403A1 (en) * 2005-05-27 2007-01-18 Güttler, Gerhard, Prof. Dr. Energy saving method for vehicle e.g. passenger plane, involves connecting drive with accumulators, loading drives by energy demand, which causes operation of vehicle, and changing loading state of accumulators based on load of drives

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19937381A1 (en) * 1999-08-07 2001-03-22 Daimler Chrysler Ag Motor vehicle with hybrid drive has event detector generating signals identifying external event; control signal affecting engine and/or motor can be generated depending on event signal
US6230496B1 (en) * 2000-06-20 2001-05-15 Lockheed Martin Control Systems Energy management system for hybrid electric vehicles
DE10128758A1 (en) 2001-06-13 2002-12-19 Bosch Gmbh Robert Control system for hybrid vehicle regulates proportion of driving power performed by electric motor whereby state of charge of battery does not fall below minimum level ensuring basic functions
DE10323722A1 (en) * 2003-05-24 2004-12-09 Daimlerchrysler Ag Engine output divide factor determination method between power produced by fuel converter and electric motor of hybrid vehicle, determines adaptive equivalence factor for weighting electrical energy consumption value
US20050228553A1 (en) * 2004-03-30 2005-10-13 Williams International Co., L.L.C. Hybrid Electric Vehicle Energy Management System
DE102005024403A1 (en) * 2005-05-27 2007-01-18 Güttler, Gerhard, Prof. Dr. Energy saving method for vehicle e.g. passenger plane, involves connecting drive with accumulators, loading drives by energy demand, which causes operation of vehicle, and changing loading state of accumulators based on load of drives

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