EP1896282A1 - Hybrid gearbox - Google Patents

Hybrid gearbox

Info

Publication number
EP1896282A1
EP1896282A1 EP06762177A EP06762177A EP1896282A1 EP 1896282 A1 EP1896282 A1 EP 1896282A1 EP 06762177 A EP06762177 A EP 06762177A EP 06762177 A EP06762177 A EP 06762177A EP 1896282 A1 EP1896282 A1 EP 1896282A1
Authority
EP
European Patent Office
Prior art keywords
differential
transmission
electric drive
drive unit
hybrid
Prior art date
Legal status (The legal status 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 status listed.)
Withdrawn
Application number
EP06762177A
Other languages
German (de)
French (fr)
Inventor
Stefan Goldschmidt
Anna Krolo
Reiner Pätzold
Jan-Peter Ziegele
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Mercedes Benz Group AG
Original Assignee
Daimler AG
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 filed Critical Daimler AG
Publication of EP1896282A1 publication Critical patent/EP1896282A1/en
Withdrawn legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60K—ARRANGEMENT 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
    • B60K6/00—Arrangement 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
    • B60K6/20—Arrangement 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
    • B60K6/22—Arrangement 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
    • B60K6/26—Arrangement 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 motors or the generators
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60K—ARRANGEMENT 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
    • B60K6/00—Arrangement 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
    • B60K6/20—Arrangement 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
    • B60K6/22—Arrangement 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
    • B60K6/36—Arrangement 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 transmission gearings
    • B60K6/365—Arrangement 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 transmission gearings with the gears having orbital motion
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60K—ARRANGEMENT 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
    • B60K6/00—Arrangement 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
    • B60K6/20—Arrangement 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
    • B60K6/22—Arrangement 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
    • B60K6/40—Arrangement 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 assembly or relative disposition of components
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60K—ARRANGEMENT 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
    • B60K6/00—Arrangement 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
    • B60K6/20—Arrangement 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
    • B60K6/42—Arrangement 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 the architecture of the hybrid electric vehicle
    • B60K6/44—Series-parallel type
    • B60K6/442—Series-parallel switching type
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60K—ARRANGEMENT 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
    • B60K6/00—Arrangement 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
    • B60K6/20—Arrangement 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
    • B60K6/42—Arrangement 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 the architecture of the hybrid electric vehicle
    • B60K6/44—Series-parallel type
    • B60K6/445—Differential gearing distribution type
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L50/00—Electric propulsion with power supplied within the vehicle
    • B60L50/10—Electric propulsion with power supplied within the vehicle using propulsion power supplied by engine-driven generators, e.g. generators driven by combustion engines
    • B60L50/15—Electric propulsion with power supplied within the vehicle using propulsion power supplied by engine-driven generators, e.g. generators driven by combustion engines with additional electric power supply
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • F16H3/00—Toothed gearings for conveying rotary motion with variable gear ratio or for reversing rotary motion
    • F16H3/44—Toothed gearings for conveying rotary motion with variable gear ratio or for reversing rotary motion using gears having orbital motion
    • F16H3/72—Toothed gearings for conveying rotary motion with variable gear ratio or for reversing rotary motion using gears having orbital motion with a secondary drive, e.g. regulating motor, in order to vary speed continuously
    • F16H3/727—Toothed gearings for conveying rotary motion with variable gear ratio or for reversing rotary motion using gears having orbital motion with a secondary drive, e.g. regulating motor, in order to vary speed continuously with at least two dynamo electric machines for creating an electric power path inside the gearing, e.g. using generator and motor for a variable power torque path
    • F16H3/728—Toothed gearings for conveying rotary motion with variable gear ratio or for reversing rotary motion using gears having orbital motion with a secondary drive, e.g. regulating motor, in order to vary speed continuously with at least two dynamo electric machines for creating an electric power path inside the gearing, e.g. using generator and motor for a variable power torque path with means to change ratio in the mechanical gearing
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • F16H37/00—Combinations of mechanical gearings, not provided for in groups F16H1/00 - F16H35/00
    • F16H37/02—Combinations of mechanical gearings, not provided for in groups F16H1/00 - F16H35/00 comprising essentially only toothed or friction gearings
    • F16H37/06—Combinations of mechanical gearings, not provided for in groups F16H1/00 - F16H35/00 comprising essentially only toothed or friction gearings with a plurality of driving or driven shafts; with arrangements for dividing torque between two or more intermediate shafts
    • F16H37/08—Combinations of mechanical gearings, not provided for in groups F16H1/00 - F16H35/00 comprising essentially only toothed or friction gearings with a plurality of driving or driven shafts; with arrangements for dividing torque between two or more intermediate shafts with differential gearing
    • F16H37/10—Combinations of mechanical gearings, not provided for in groups F16H1/00 - F16H35/00 comprising essentially only toothed or friction gearings with a plurality of driving or driven shafts; with arrangements for dividing torque between two or more intermediate shafts with differential gearing at both ends of intermediate shafts
    • F16H2037/102—Combinations of mechanical gearings, not provided for in groups F16H1/00 - F16H35/00 comprising essentially only toothed or friction gearings with a plurality of driving or driven shafts; with arrangements for dividing torque between two or more intermediate shafts with differential gearing at both ends of intermediate shafts the input or output shaft of the transmission is connected or connectable to two or more differentials
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • F16H37/00—Combinations of mechanical gearings, not provided for in groups F16H1/00 - F16H35/00
    • F16H37/02—Combinations of mechanical gearings, not provided for in groups F16H1/00 - F16H35/00 comprising essentially only toothed or friction gearings
    • F16H37/06—Combinations of mechanical gearings, not provided for in groups F16H1/00 - F16H35/00 comprising essentially only toothed or friction gearings with a plurality of driving or driven shafts; with arrangements for dividing torque between two or more intermediate shafts
    • F16H37/08—Combinations of mechanical gearings, not provided for in groups F16H1/00 - F16H35/00 comprising essentially only toothed or friction gearings with a plurality of driving or driven shafts; with arrangements for dividing torque between two or more intermediate shafts with differential gearing
    • F16H37/10—Combinations of mechanical gearings, not provided for in groups F16H1/00 - F16H35/00 comprising essentially only toothed or friction gearings with a plurality of driving or driven shafts; with arrangements for dividing torque between two or more intermediate shafts with differential gearing at both ends of intermediate shafts
    • F16H2037/104—Power split variators with one end of the CVT connected or connectable to two or more differentials
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • F16H37/00—Combinations of mechanical gearings, not provided for in groups F16H1/00 - F16H35/00
    • F16H37/02—Combinations of mechanical gearings, not provided for in groups F16H1/00 - F16H35/00 comprising essentially only toothed or friction gearings
    • F16H37/06—Combinations of mechanical gearings, not provided for in groups F16H1/00 - F16H35/00 comprising essentially only toothed or friction gearings with a plurality of driving or driven shafts; with arrangements for dividing torque between two or more intermediate shafts
    • F16H37/08—Combinations of mechanical gearings, not provided for in groups F16H1/00 - F16H35/00 comprising essentially only toothed or friction gearings with a plurality of driving or driven shafts; with arrangements for dividing torque between two or more intermediate shafts with differential gearing
    • F16H37/10—Combinations of mechanical gearings, not provided for in groups F16H1/00 - F16H35/00 comprising essentially only toothed or friction gearings with a plurality of driving or driven shafts; with arrangements for dividing torque between two or more intermediate shafts with differential gearing at both ends of intermediate shafts
    • F16H2037/105—Combinations of mechanical gearings, not provided for in groups F16H1/00 - F16H35/00 comprising essentially only toothed or friction gearings with a plurality of driving or driven shafts; with arrangements for dividing torque between two or more intermediate shafts with differential gearing at both ends of intermediate shafts characterised by number of modes or ranges, e.g. for compound gearing
    • F16H2037/106—Combinations of mechanical gearings, not provided for in groups F16H1/00 - F16H35/00 comprising essentially only toothed or friction gearings with a plurality of driving or driven shafts; with arrangements for dividing torque between two or more intermediate shafts with differential gearing at both ends of intermediate shafts characterised by number of modes or ranges, e.g. for compound gearing with switching means to provide two variator modes or ranges
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • F16H2200/00—Transmissions for multiple ratios
    • F16H2200/20—Transmissions using gears with orbital motion
    • F16H2200/2002—Transmissions using gears with orbital motion characterised by the number of sets of orbital gears
    • F16H2200/201—Transmissions using gears with orbital motion characterised by the number of sets of orbital gears with three sets of orbital gears
    • Y—GENERAL 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
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/60—Other road transportation technologies with climate change mitigation effect
    • Y02T10/62—Hybrid vehicles
    • Y—GENERAL 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
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/60—Other road transportation technologies with climate change mitigation effect
    • Y02T10/64—Electric machine technologies in electromobility
    • Y—GENERAL 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
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/60—Other road transportation technologies with climate change mitigation effect
    • Y02T10/7072—Electromobility specific charging systems or methods for batteries, ultracapacitors, supercapacitors or double-layer capacitors

Definitions

  • the invention relates to a hybrid transmission for a hybrid motor vehicle according to the preamble of claim 1. Furthermore, the invention relates to a hybrid motor vehicle with such a hybrid transmission.
  • Hybrid transmissions for motor vehicles which have a plurality of power-split driving ranges, discrete gear stages and, in addition to an internal combustion engine, two electric drive units are described, for example, in US Pat. Nos. 5,904,631, 6,478,705 Bl, 6,358,173 Bl, 6,090,005, 6,743,135 B2, 6,551,208 Bl, EP 0 967 102 Bl, US 5,931,757, US 6,022,287 and the non-prepublished patent application of the applicant DE 102004053044 known.
  • Pushing operation by the electric drive units, a boost operation, a consumption reduction, reduced exhaust emissions, a start-stop operation, a release of a separate starter and / or a
  • the object of the invention is to propose a hybrid transmission improved with regard to the installation space requirements and / or the kinetic and kinematic conditions, as well as a motor vehicle with such a hybrid transmission.
  • the object is achieved by the features of claim 1. Accordingly, in the power flow between the transmission input shaft and the transmission output shaft three differentials are interposed, which allow a variety of different driving conditions.
  • the electric drive units are arranged axially adjacent to each other and between the three differentials and the internal combustion engine. This embodiment is based on the finding that the drive torque generated by means of the electric drive units is dependent on the diameter of a rotor of the electric drive unit. For large moments to be generated, therefore, the electric drive units must have relatively large radial extent. On the other hand leads at a given moment an enlarged diameter of the electric drive unit to a smaller necessary axial extent.
  • the fact that the input side of the hybrid transmission is often flanged onto an internal combustion engine is exploited, the internal combustion engine having a relatively large radial extent. Accordingly, the radial extent does not increase in a transition from the internal combustion engine to the two electric drive units, but can in particular reduce. This concludes, u. U. with a further taper of the radial extent, the transmission structure with the differentials, so that the drive train with increasing distance from the internal combustion engine can be further tapered. This corresponds in the area of the hybrid transmission, the cross-sectional design largely customary, tapered vehicle tunnels.
  • the present invention has recognized that in hybrid transmissions according to the prior art, the speeds of the planets are very high, at least in partial operating ranges. This has for example
  • the rotational speeds of the planet are reduced by the fact that three differentials interact with each other, wherein the transmission input shaft drives both a transmission element of the first differential and a transmission element of the second differential, the first electric drive unit drives a transmission element of the second differential and the second electric drive unit with both the first differential and the third differential is connected or connectable.
  • a first transmission element is in driving connection with the
  • a second gear element is not driven directly by a first electric drive unit, but rather with the interposition of a second differential.
  • the third transmission element is further in drive connection with the second electric drive unit.
  • the first gear element is a ring gear
  • the second gear element is a land
  • the third gear element is a sun gear.
  • a connection or a drive can constantly exist or only temporarily, so that a switching element can be interposed.
  • a switching element via which the first differential and the second differential can each be blocked and each other.
  • a coupling element which in the activated state in each case connects two of the six gear elements of the first and second differential with each other.
  • a coupling is a Particularly simple connection of the internal combustion engine with the first electric drive unit possible without this mandatory rolling gear connections are interposed, which can lead to losses of efficiency.
  • Such a coupling can be used on the one hand for a superposition of the drive power of the electric drive unit and the internal combustion engine.
  • a drive of the internal combustion engine via the electric drive unit for starting the internal combustion engine is possible.
  • the power of the internal combustion engine can continue to take place in selected phases of operation via the electric drive unit, a return of energy in a battery of this drive unit, the other drive unit or both drive units.
  • the aforementioned blocking can also be used for operation of the hybrid transmission in a discrete gear ratio.
  • the second differential is disposed axially between the first differential and the electric drive units.
  • This can be done by suitable webs or arms or by closed, bell-shaped elements, which can serve in addition to the drive connection further functions such as a recording of the differentials or transmission elements, external protection and / or storage.
  • a synchronizing power of the actuated switching elements can be reduced or avoided, which can be increased Switching times and / or can lead to increased wear.
  • a change from a first continuously variable driving range to a discrete transmission gear without synchronization of the transmission elements which are effective in the transmission gear can also take place.
  • a further embodiment of the invention can be realized with three differentials, two brakes and at least two clutches at least four forward gears, two stepless driving ranges, a serial driving range and an electric driving range.
  • a further solution of the object underlying the invention results from a motor vehicle according to the features of claim 10.
  • a hybrid transmission of the previously described manner is integrated in a drive train with standard drive.
  • the extension of the drive train decreases starting from the internal combustion engine via the electric drive units to the differentials transversely to the longitudinal axis of the drive train, so that the drive train is formed tapered in this area.
  • Such a drive train can be integrated to save space in a tapered between electric drive units and differentials vehicle tunnel.
  • the hybrid transmission can be moved further back into the motor vehicle, so that through the inventive design in the engine compartment space is released.
  • Fig. 1 shows a first embodiment according to the invention of a hybrid transmission in a schematic wheel plan
  • FIG. 2 shows a second embodiment of a hybrid transmission according to the invention in a schematic wheel plan.
  • the invention relates to a hybrid transmission 30, which preferably finds use in a motor vehicle with standard drive, is installed in the vehicle longitudinal direction and is at least partially integrated into a vehicle tunnel.
  • the hybrid transmission 30 has a transmission input shaft 31, which is drivingly connected to an internal combustion engine, and a transmission output shaft 32, which is in driving connection with wheels of the motor vehicle.
  • hybrid transmission 30 are in the following order in axially successive planes and substantially coaxial with each other
  • first electric drive unit 33 a first electric drive unit 33, a second electric drive unit 34, a second differential 35, a first differential 36,
  • the transmission input shaft 31 is passed through the second differential 35 radially inwardly and is in fixed drive connection with a web 43 of the second differential 35, which is formed in the embodiment of FIG. 1 as a double web and two intermeshing planets 2, 3 superimposed, and a Ring gear 8 of the first differential 36.
  • a web 43 of the second differential 35 which is formed in the embodiment of FIG. 1 as a double web and two intermeshing planets 2, 3 superimposed, and a Ring gear 8 of the first differential 36.
  • the indicated in Fig. 1 with the dashed circle clutch 44 is not present, so that no fixed connection between the ring gear 8 and a double web 45 of the first differential 36 is present or can be produced.
  • a sun gear 1 of the second differential 35 is directly driven by the first electric drive unit 33.
  • the second electric drive unit 34 is guided around the second differential 35 and the first differential 36 radially outward via a web or a bell-like housing and can be brought into drive connection via the coupling 38 with a sun gear 5 of the first differential 36.
  • a ring gear 4 of the second differential 35 is connected via a radially outside of the clutch 44 and the first differential 36 guided past drive connection in constant driving connection with the double web 45, the two planets 6, 7 superimposed. Furthermore, the ring gear 4 via the clutch 37 with the sun gear 5 can be brought into drive connection.
  • the double web 45 is in constant driving connection with a through the first differential 36, clutches 37, 38 and brakes 39, 40 and the third differential 41 passed through intermediate shaft 46 which is selectively engageable via the clutch 42 in drive connection with the transmission output shaft 32.
  • the ring gear 4 of the second differential 35 for closed clutches 37 and 38 - and the sun gear 5 of the first closed clutch differential 38 - is / are connected to a sun gear 9 of the third differential 41 and can be connected to a housing via the brake 39.
  • a web 47 of the third differential 41 which is designed as a double web for the embodiment according to FIG. 1 and supports two planets 10, 11, can be connected to the housing via the brake 40.
  • a ring gear 12 of the third differential 41 is continuously connected to the transmission output shaft 32 and connectable via the coupling 42 with the intermediate shaft 46.
  • the coupling 37 can also be omitted, so that at this point no connection between the double web 45 and the sun gear 5 is possible.
  • a Clutch 44 is provided, via which selectively the ring gear 8 with the double web 45 is connectable.
  • the variant of a hybrid transmission 30a shown in FIG. 2 differs from FIG. 1 in the construction of the wheelset structures, but not with regard to the loads on the electric motors and the clutches.
  • the first differential 3 ⁇ a and the third differential 41a are not formed with two planets 2, 3 and 10, 11, but rather with individual planets 14, 21, so that the webs 43a and 47a are formed as a single web.
  • the transmission input shaft 31a in the second differential 35a drives the ring gear 15, while the web 43a of the second differential 35a is in driving connection with the double web 45a.
  • the brake 40a is in this case connected to a ring gear 22 of the third differential 41a, while the web 47a is fixedly connected to the transmission output shaft 32a.
  • E-ride XX The clutch 37 and 44 causes in the closed state that both the second differential 35 and the first differential 36 rotate in the block.
  • the variants of the clutch 37, 44 differ in the closed state by the occurring moment load of the clutch, while in the open state, the differential speeds are different.
  • the hybrid transmission 30 operates in the stepless, power-split driving range 1.
  • the transmission can be adjusted in the direction of smaller ratios.
  • the differential speed of the (open) clutch 42 continues to decrease.
  • a sync point is reached, i. H. a translation in which, ideally, a change from the first driving range takes place in a second stepless driving range.
  • the clutch 42 can then be closed without the two coupling halves must be actively synchronized. If only the clutch 42 is actuated, the hybrid transmission 30 changes to the second gear, whose ratio always corresponds to the ratio at which the differential speed of the clutch 42 is equal to zero.
  • the transmission can be divided into two completely decoupled halves (mode "serial").
  • the first electric drive unit 33 is in each case rotatably connected to the internal combustion engine, while the second electric drive unit 34 is in drive connection with the transmission output shaft 32.
  • the internal combustion engine can be started with the aid of the first electric drive unit 33, without the starting process of the internal combustion engine having an influence on the output torque.
  • the first electric drive unit 33 can be operated as a generator while the internal combustion engine is running, feeding the second electric drive unit 34, for example when the battery is empty, thus guaranteeing, for example, a permanent electric reverse drive with sufficient tractive force.
  • a reverse drive is then, if no reverse gear is provided with a fixed ratio, as follows:
  • the brake 40 is closed and allows the second electric drive unit 34 to provide the output torque required for a desired driving maneuver. Since a further speed is predetermined by the in the electric drive advantageously stationary engine, in particular a speed zero, all other speeds are fixed.
  • the first electric drive unit 33 is either entrained at the self-adjusting speed or just energized so far that the drag torque of the first electric drive unit 33 does not have to be compensated additionally by the second electric drive unit 34.

Abstract

The invention relates to a hybrid gearbox for a hybrid motor vehicle, comprising power-branched driving regions, discreet gear steps, and two electrical drive units (33, 34). According to the invention, the gearbox structure selected is designed in such a way that low rotational speeds of the gearbox elements, especially the planets, are achieved. The electrical drive units (33, 34) are adjacently arranged in relation to each other, between three differentials (35, 36, 41) and an internal combustion engine.

Description

Hybridgetriebe hybrid transmission
Die Erfindung betrifft ein Hybridgetriebe für ein hybrides Kraftfahrzeug gemäß dem Oberbegriff des Patentanspruchs 1. Weiterhin betrifft die Erfindung ein hybrides Kraftfahrzeug mit einem derartigen Hybridgetriebe.The invention relates to a hybrid transmission for a hybrid motor vehicle according to the preamble of claim 1. Furthermore, the invention relates to a hybrid motor vehicle with such a hybrid transmission.
Hybridgetriebe für Kraftfahrzeuge, die mehrere leistungsverzweigte Fahrbereiche, diskrete Gangstufen und neben einer Brennkraftmaschine zwei elektrische Antriebsaggregate aufweisen, sind beispielsweise aus den Druckschriften US 5,904,631, US 6,478,705 Bl, US 6,358,173 Bl, US 6,090,005, US 6,743,135 B2, US 6,551,208 Bl, EP 0 967 102 Bl, US 5,931,757, US 6,022,287 sowie der nicht vorveröffentlichten Patentanmeldung der Anmelderin DE 102004053044 bekannt.Hybrid transmissions for motor vehicles which have a plurality of power-split driving ranges, discrete gear stages and, in addition to an internal combustion engine, two electric drive units are described, for example, in US Pat. Nos. 5,904,631, 6,478,705 Bl, 6,358,173 Bl, 6,090,005, 6,743,135 B2, 6,551,208 Bl, EP 0 967 102 Bl, US 5,931,757, US 6,022,287 and the non-prepublished patent application of the applicant DE 102004053044 known.
Derartige Hybridgetriebe ermöglichen einen vorteilhaften Betrieb des Kraftfahrzeugs, insbesondereSuch hybrid transmissions enable advantageous operation of the motor vehicle, in particular
eine Anfahrfunktion mittels eines Geared-Neutral-a starting function by means of a geared neutral
Fahrbereichs, hoher Anfahrmomente, einen Betrieb der Brennkraftmaschine mit gleichbleibender Drehzahl für unterschiedlicheDriving range, high starting torque, an operation of the internal combustion engine at a constant speed for different
Fahrgeschwindigkeiten, eine Rekuperation von Energie, beispielsweise imDriving speeds, a recuperation of energy, for example in the
Schubbetrieb, durch die elektrischen Antriebsaggregate, einen Boost-Betrieb, eine Verbrauchsminderung, verringerte Abgaswerte, einen Start-Stopp-Betrieb, einen Entfall eines separaten Starters und/oder einesPushing operation, by the electric drive units, a boost operation, a consumption reduction, reduced exhaust emissions, a start-stop operation, a release of a separate starter and / or a
Anfahrelements, einen Wechsel in einem stufenlosen Fahrbereich von einer Vorwärts- zu einer RückwärtsfahrtStarting element, a change in a stepless driving range of a forward to a reverse drive
und/oder ähnliches.and / or the like.
Hiervon ausgehend liegt der Erfindung die Aufgabe zugrunde, ein hinsichtlich der Bauraumanforderungen und/oder der kinetischen und kinematischen Bedingungen verbessertes Hybridgetriebe sowie ein Kraftfahrzeug mit einem derartigen Hybridgetriebe vorzuschlagen.Proceeding from this, the object of the invention is to propose a hybrid transmission improved with regard to the installation space requirements and / or the kinetic and kinematic conditions, as well as a motor vehicle with such a hybrid transmission.
Erfindungsgemäß wird die Aufgabe durch die Merkmale des Anspruchs 1 gelöst. Demgemäß sind in den Kraftfluss zwischen die Getriebeeingangswelle und die Getriebeausgangswelle drei Differentiale zwischengeschaltet, die eine Vielzahl von unterschiedlichen Antriebszuständen ermöglichen. Die elektrischen Antriebsaggregate sind axial benachbart zueinander angeordnet sowie zwischen den drei Differentialen und der Brennkraftmaschine. Dieser Ausgestaltung liegt die Erkenntnis zugrunde, dass das mittels der elektrischen Antriebsaggregate erzeugte Antriebsmoment abhängig ist vom Durchmesser eines Rotors des elektrischen Antriebsaggregats. Für große zu erzeugende Momente müssen daher die elektrischen Antriebsaggregate verhältnismäßig große radiale Erstreckungen besitzen. Andererseits führt bei einem vorgegebenen Moment ein vergrößerter Durchmesser des elektrischen Antriebsaggregates zu einer geringeren notwendigen axialen Erstreckung. Sind andererseits die elektrischen Antriebsaggregate mit großen Radien verhältnismäßig weit in Richtung des Abtriebs angeordnet, hat dieses den Nachteil, dass das Hybridgetriebe beabstandet von der Brennkraftmaschine einen großen Einbauraum erfordert, insbesondere im Bereich eines Fahrzeugtunnels und/oder im Bereich einer Fahrgastzelle.According to the invention the object is achieved by the features of claim 1. Accordingly, in the power flow between the transmission input shaft and the transmission output shaft three differentials are interposed, which allow a variety of different driving conditions. The electric drive units are arranged axially adjacent to each other and between the three differentials and the internal combustion engine. This embodiment is based on the finding that the drive torque generated by means of the electric drive units is dependent on the diameter of a rotor of the electric drive unit. For large moments to be generated, therefore, the electric drive units must have relatively large radial extent. On the other hand leads at a given moment an enlarged diameter of the electric drive unit to a smaller necessary axial extent. On the other hand, if the electric drive units with large radii are arranged relatively far in the direction of the output, this has the disadvantage that that the hybrid transmission spaced from the internal combustion engine requires a large installation space, especially in the area of a vehicle tunnel and / or in the region of a passenger compartment.
Erfindungsgemäß wird stattdessen ausgenutzt, dass die Eingangsseite des Hybridgetriebes oftmals an eine Brennkraftmaschine angeflanscht wird, wobei die Brennkraftmaschine eine verhältnismäßig große radiale Erstreckung aufweist. Demgemäß vergrößert sich bei einem Übergang von der Brennkraftmaschine zu den beiden elektrischen Antriebsaggregaten die radiale Erstreckung nicht, sondern kann sich insbesondere verringern. Hieran schließt, u. U. mit einer weiteren Verjüngung der radialen Erstreckung, die Getriebestruktur mit den Differentialen an, so dass der Antriebsstrang mit zunehmender Entfernung von der Brennkraftmaschine weiter verjüngt sein kann. Hiermit entspricht im Bereich des Hybridgetriebes die Querschnittsgestaltung weitestgehend üblichen, sich verjüngenden Fahrzeugtunneln.Instead, according to the invention, the fact that the input side of the hybrid transmission is often flanged onto an internal combustion engine is exploited, the internal combustion engine having a relatively large radial extent. Accordingly, the radial extent does not increase in a transition from the internal combustion engine to the two electric drive units, but can in particular reduce. This concludes, u. U. with a further taper of the radial extent, the transmission structure with the differentials, so that the drive train with increasing distance from the internal combustion engine can be further tapered. This corresponds in the area of the hybrid transmission, the cross-sectional design largely customary, tapered vehicle tunnels.
Darüber hinaus hat die vorliegende Erfindung erkannt, dass bei Hybridgetrieben entsprechend dem Stand der Technik die Drehzahlen der Planeten zumindest in Teilbetriebsbereichen sehr hoch sind. Dies hat beispielsweiseIn addition, the present invention has recognized that in hybrid transmissions according to the prior art, the speeds of the planets are very high, at least in partial operating ranges. This has for example
eine unerwünschte Erwärmung, einen erhöhten Verschleiß, erhöhte Lagerbeanspruchungen und/oder eine erhöhte Geräuschentwicklungan undesirable heating, increased wear, increased bearing stresses and / or increased noise
zur Folge. Erfindungsgemäß werden die Drehzahlen der Planeten dadurch gemindert, dass drei Differentiale miteinander zusammenwirken, wobei die Getriebeeingangswelle sowohl ein Getriebeelement des ersten Differentiales als auch ein Getriebeelement des zweiten Differentiales antreibt, das erste elektrische Antriebsaggregat ein Getriebeelement des zweiten Differentiales antreibt und das zweite elektrische Antriebsaggregat sowohl mit dem ersten Differential als auch dem dritte Differential verbunden ist oder verbindbar ist.result. According to the invention, the rotational speeds of the planet are reduced by the fact that three differentials interact with each other, wherein the transmission input shaft drives both a transmission element of the first differential and a transmission element of the second differential, the first electric drive unit drives a transmission element of the second differential and the second electric drive unit with both the first differential and the third differential is connected or connectable.
Vorzugsweise steht in einem ersten Differential ein erstes Getriebeelement in Antriebsverbindung mit derPreferably, in a first differential, a first transmission element is in driving connection with the
Getriebeeingangswelle und ist damit in Antriebsverbindung mit der Brennkraftmaschine bringbar. Ein zweites Getriebeelement wird nicht unmittelbar von einem ersten elektrischen Antriebsaggregat angetrieben, sondern vielmehr unter Zwischenschaltung eines zweiten Differentials. Das dritte Getriebeelement steht weiterhin in Antriebsverbindung mit dem zweiten elektrischen Antriebsaggregat. Beispielsweise handelt es sich bei dem ersten Getriebeelement um ein Hohlrad, bei dem zweiten Getriebeelement um einen Steg und bei dem dritten Getriebeelement um ein Sonnenrad. Im Sinne der Erfindung kann eine Verbindung oder ein Antrieb ständig bestehen oder nur temporär, so dass ein Schaltelement zwischengeschaltet sein kann .Transmission input shaft and is thus brought into drive connection with the internal combustion engine. A second gear element is not driven directly by a first electric drive unit, but rather with the interposition of a second differential. The third transmission element is further in drive connection with the second electric drive unit. For example, the first gear element is a ring gear, the second gear element is a land, and the third gear element is a sun gear. For the purposes of the invention, a connection or a drive can constantly exist or only temporarily, so that a switching element can be interposed.
Gemäß einer Weiterbildung des erfindungsgemäßen Hybridgetriebes ist (mindestens) ein Schaltelement vorhanden, über welches das erste Differential und das zweite Differential jeweils und miteinander verblockt werden können. Hierbei handelt es sich insbesondere um ein Koppelelement, welches in aktiviertem Zustand jeweils zwei der sechs Getriebeelemente des ersten und zweiten Differentials miteinander verbindet. Für eine derartige Kopplung ist eine besonders einfache Verbindung der Brennkraftmaschine mit dem ersten elektrischen Antriebsaggregat möglich, ohne dass hierbei zwingend wälzende Zahnradverbindungen zwischengeschaltet sind, die zu Einbußen des Wirkungsgrades führen können. Eine derartige Kopplung kann einerseits für eine Überlagerung der Antriebsleistungen des elektrischen Antriebsaggregats und der Brennkraftmaschine genutzt werden. Andererseits ist ein Antrieb der Brennkraftmaschine über das elektrische Antriebsaggregat zum Starten der Brennkraftmaschine möglich. Für den Fall, dass die Leistung der Brennkraftmaschine nicht erforderlich ist, kann weiterhin in ausgewählten Betriebsphasen über das elektrische Antriebsaggregat eine Rückspeisung der Energie in eine Batterie dieses Antriebsaggregats, des anderen Antriebsaggregats oder beider Antriebsaggregate erfolgen. Die vorgenannte Verblockung kann weiterhin auch für einen Betrieb des Hybridgetriebes in einer diskreten Gangstufe eingesetzt werden .According to one embodiment of the hybrid transmission according to the invention (at least) a switching element is present, via which the first differential and the second differential can each be blocked and each other. This is in particular a coupling element, which in the activated state in each case connects two of the six gear elements of the first and second differential with each other. For such a coupling is a Particularly simple connection of the internal combustion engine with the first electric drive unit possible without this mandatory rolling gear connections are interposed, which can lead to losses of efficiency. Such a coupling can be used on the one hand for a superposition of the drive power of the electric drive unit and the internal combustion engine. On the other hand, a drive of the internal combustion engine via the electric drive unit for starting the internal combustion engine is possible. In the event that the power of the internal combustion engine is not required, can continue to take place in selected phases of operation via the electric drive unit, a return of energy in a battery of this drive unit, the other drive unit or both drive units. The aforementioned blocking can also be used for operation of the hybrid transmission in a discrete gear ratio.
Vorzugsweise ist das zweite Differential axial zwischen dem ersten Differential und den elektrischen Antriebsaggregaten angeordnet. Für den Antrieb des dritten Getriebeelements durch das zweite elektrische Antriebsaggregat bedeutet dies, dass die Antriebsverbindung um das zweite Differential herumgeführt ist. Dieses kann durch geeignete Stege oder Arme erfolgen oder durch geschlossene, glockenartige Elemente, die neben der Antriebsverbindung weiteren Funktionen wie einer Aufnahme der Differentiale oder von Getriebeelementen, einem äußeren Schutz und/oder einer Lagerung dienen können.Preferably, the second differential is disposed axially between the first differential and the electric drive units. For the drive of the third transmission element by the second electric drive unit, this means that the drive connection is guided around the second differential. This can be done by suitable webs or arms or by closed, bell-shaped elements, which can serve in addition to the drive connection further functions such as a recording of the differentials or transmission elements, external protection and / or storage.
Für den Fall, dass ein Wechsel zwischen zwei benachbarten stufenlosen Fahrbereichen an einem Synchronpunkt erfolgt, kann eine Synchronisierleistung der betätigten Schaltelemente verringert oder vermieden werden, die zu vergrößerten Schaltzeiten und/oder zu einem erhöhten Verschleiß führen kann. Je nach dem gewünschten Betrieb des Kraftfahrzeugs kann auch ein Wechsel von einem ersten stufenlosen Fahrbereich in einen diskreten Getriebegang ohne Synchronisation der in dem Getriebegang wirksamen Getriebeelemente erfolgen. Vorzugsweise kann dann wahlweise von dem ersten stufenlosen Fahrbereich in den Getriebegang oder den zweiten stufenlosen Fahrbereich gewechselt werden. Denkbar ist auch, dass der diskrete Getriebegang nur temporär aktiviert wird mit anschließendem Wechsel in den zweiten stufenlosen Fahrbereich .In the event that a change between two adjacent stepless driving ranges takes place at a synchronization point, a synchronizing power of the actuated switching elements can be reduced or avoided, which can be increased Switching times and / or can lead to increased wear. Depending on the desired operation of the motor vehicle, a change from a first continuously variable driving range to a discrete transmission gear without synchronization of the transmission elements which are effective in the transmission gear can also take place. Preferably, it is then optionally possible to change over from the first stepless driving range into the transmission gear or the second stepless driving range. It is also conceivable that the discrete transmission gear is only temporarily activated with subsequent change in the second continuously variable driving range.
Gemäß einer weiteren Ausgestaltung der Erfindung können mit drei Differentialen, zwei Bremsen und mindestens zwei Kupplungen zumindest vier Vorwärtsgänge, zwei stufenlose Fahrbereiche, ein serieller Fahrbereich und ein elektrischer Fahrbereich realisiert werden.According to a further embodiment of the invention can be realized with three differentials, two brakes and at least two clutches at least four forward gears, two stepless driving ranges, a serial driving range and an electric driving range.
Eine weitere Lösung der der Erfindung zugrunde liegenden Aufgabe ergibt sich durch ein Kraftfahrzeug gemäß den Merkmalen des Patentanspruchs 10. In diesem Fall ist ein Hybridgetriebe der zuvor beschriebenen Weise in einen Antriebsstrang mit Standardantrieb integriert. Die Erstreckung des Antriebsstrangs nimmt ausgehend von der Brennkraftmaschine über die elektrischen Antriebsaggregate zu den Differentialen quer zur Längsachse des Antriebsstrangs ab, so dass der Antriebsstrang in diesem Bereich verjüngt ausgebildet ist. Ein derartiger Antriebsstrang kann Platz sparend in einen sich zwischen elektrischen Antriebsaggregaten und Differentialen verjüngenden Fahrzeugtunnel integriert sein. Hierdurch ist eventuell auch ermöglicht, dass das Hybridgetriebe weiter nach hinten in das Kraftfahrzeug versetzt werden kann, so dass durch die erfindungsgemäße Gestaltung im Motorraum Bauraum freigegeben wird .A further solution of the object underlying the invention results from a motor vehicle according to the features of claim 10. In this case, a hybrid transmission of the previously described manner is integrated in a drive train with standard drive. The extension of the drive train decreases starting from the internal combustion engine via the electric drive units to the differentials transversely to the longitudinal axis of the drive train, so that the drive train is formed tapered in this area. Such a drive train can be integrated to save space in a tapered between electric drive units and differentials vehicle tunnel. As a result, it may also be possible that the hybrid transmission can be moved further back into the motor vehicle, so that through the inventive design in the engine compartment space is released.
Vorteilhafte Weiterbildungen ergeben sich aus den Unteransprüchen, der Beschreibung und den Zeichnungen. Weitere Merkmale sind der Zeichnung, insbesondere den dargestellten Geometrien der Bauteile, den relativen Abmessungen mehrerer dargestellter Maße gleicher oder unterschiedlicher Bauteile, der relativen Anordnung der Bauteile zueinander und deren Wirkverbindungen miteinander, zu entnehmen. Die Kombination von Merkmalen unterschiedlicher in verschiedenen Figuren dargestellter Ausgestaltungen, Merkmalen unterschiedlicher Ansprüche und/oder der vorgenannten Merkmale mit Merkmalen der Ausgestaltungen des genannten Standes der Technik ist ebenfalls möglich und wird hiermit angeregt.Advantageous developments emerge from the subclaims, the description and the drawings. Further features of the drawing, in particular the illustrated geometries of the components, the relative dimensions of several illustrated dimensions of the same or different components, the relative arrangement of the components to each other and their operative connections with each other, refer. The combination of features of different embodiments shown in different figures, features of different claims and / or the aforementioned features with features of the embodiments of said prior art is also possible and is hereby stimulated.
Bevorzugte Ausführungsbeispiele der erfindungsgemäßen Hybridgetriebe werden nachfolgend anhand der Zeichnung näher erläutert. In der Zeichnung zeigt:Preferred embodiments of the hybrid transmission according to the invention will be explained in more detail with reference to the drawing. In the drawing shows:
Fig. 1 ein erstes erfindungsgemäßes Ausführungsbeispiel eines Hybridgetriebes in einem schematischen Räderplan undFig. 1 shows a first embodiment according to the invention of a hybrid transmission in a schematic wheel plan and
Fig. 2 ein zweites erfindungsgemäßes Ausführungsbeispiel eines Hybridgetriebes in einem schematischen Räderplan .2 shows a second embodiment of a hybrid transmission according to the invention in a schematic wheel plan.
Die Erfindung betrifft ein Hybridgetriebe 30, welches vorzugsweise Einsatz in einem Kraftfahrzeug mit Standardantrieb findet, in Fahrzeuglängsrichtung eingebaut ist und zumindest teilweise in einen Fahrzeugtunnel integriert ist. Das Hybridgetriebe 30 besitzt eine Getriebeeingangswelle 31, die mit einer Brennkraftmaschine antriebsmäßig verbunden ist, sowie eine Getriebeausgangswelle 32, die in Antriebsverbindung mit Rädern des Kraftfahrzeugs steht.The invention relates to a hybrid transmission 30, which preferably finds use in a motor vehicle with standard drive, is installed in the vehicle longitudinal direction and is at least partially integrated into a vehicle tunnel. The hybrid transmission 30 has a transmission input shaft 31, which is drivingly connected to an internal combustion engine, and a transmission output shaft 32, which is in driving connection with wheels of the motor vehicle.
In dem Hybridgetriebe 30 sind in der folgenden Reihenfolge in axial hintereinanderliegenden Ebenen und im Wesentlichen koaxial zueinanderIn the hybrid transmission 30 are in the following order in axially successive planes and substantially coaxial with each other
ein erstes elektrisches Antriebsaggregat 33, ein zweites elektrisches Antriebsaggregat 34, ein zweites Differential 35, ein erstes Differential 36,a first electric drive unit 33, a second electric drive unit 34, a second differential 35, a first differential 36,
Kupplungen 37, 38,Clutches 37, 38,
Bremsen 39, 40, ein drittes Differential 41 und eine Kupplung 42Brakes 39, 40, a third differential 41 and a clutch 42
zwischen die Getriebeeingangswelle 31 und die Getriebeausgangswelle 32 zwischengeschaltet.between the transmission input shaft 31 and the transmission output shaft 32 interposed.
Die Getriebeeingangswelle 31 ist durch das zweite Differential 35 radial innenliegend hindurchgeführt und steht in fester Antriebsverbindung mit einem Steg 43 des zweiten Differentials 35, der in dem Ausführungsbeispiel gemäß Fig. 1 als Doppelsteg ausgebildet ist und zwei miteinander kämmende Planeten 2, 3 lagert, sowie einem Hohlrad 8 des ersten Differentials 36. Für eine erste Ausführungsvariante ist die in Fig. 1 mit dem gestrichelten Kreis angedeutete Kupplung 44 nicht vorhanden, so dass keine feste Verbindung zwischen dem Hohlrad 8 und einem Doppelsteg 45 des ersten Differentials 36 vorhanden ist oder herstellbar ist. Ein Sonnenrad 1 des zweiten Differentials 35 wird unmittelbar von dem ersten elektrischen Antriebsaggregat 33 angetrieben. Das zweite elektrische Antriebsaggregat 34 ist radial außenliegend über einen Steg oder ein glockenartiges Gehäuse um das zweite Differential 35 und das erste Differential 36 herumgeführt und über die Kupplung 38 mit einem Sonnenrad 5 des ersten Differentials 36 in Antriebsverbindung bringbar. Ein Hohlrad 4 des zweiten Differentials 35 steht über eine radial außenliegend an der Kupplung 44 und dem ersten Differential 36 vorbeigeführte Antriebsverbindung in ständiger Antriebsverbindung mit dem Doppelsteg 45, der zwei Planeten 6, 7 lagert. Weiterhin ist das Hohlrad 4 über die Kupplung 37 mit dem Sonnenrad 5 in Antriebsverbindung bringbar. Der Doppelsteg 45 steht in ständiger Antriebsverbindung mit einer durch das erste Differential 36, Kupplungen 37, 38 und Bremsen 39, 40 sowie das dritte Differential 41 hindurchgeführten Zwischenwelle 46, die über die Kupplung 42 selektiv in Antriebsverbindung mit der Getriebeausgangswelle 32 bringbar ist.The transmission input shaft 31 is passed through the second differential 35 radially inwardly and is in fixed drive connection with a web 43 of the second differential 35, which is formed in the embodiment of FIG. 1 as a double web and two intermeshing planets 2, 3 superimposed, and a Ring gear 8 of the first differential 36. For a first embodiment, the indicated in Fig. 1 with the dashed circle clutch 44 is not present, so that no fixed connection between the ring gear 8 and a double web 45 of the first differential 36 is present or can be produced. A sun gear 1 of the second differential 35 is directly driven by the first electric drive unit 33. The second electric drive unit 34 is guided around the second differential 35 and the first differential 36 radially outward via a web or a bell-like housing and can be brought into drive connection via the coupling 38 with a sun gear 5 of the first differential 36. A ring gear 4 of the second differential 35 is connected via a radially outside of the clutch 44 and the first differential 36 guided past drive connection in constant driving connection with the double web 45, the two planets 6, 7 superimposed. Furthermore, the ring gear 4 via the clutch 37 with the sun gear 5 can be brought into drive connection. The double web 45 is in constant driving connection with a through the first differential 36, clutches 37, 38 and brakes 39, 40 and the third differential 41 passed through intermediate shaft 46 which is selectively engageable via the clutch 42 in drive connection with the transmission output shaft 32.
Das Hohlrad 4 des zweiten Differentials 35 für geschlossene Kupplungen 37 und 38 - und das Sonnenrad 5 des ersten Differentials 36 für geschlossene Kupplung 38 - ist/sind mit einem Sonnenrad 9 des dritten Differentials 41 verbunden sowie über die Bremse 39 mit einem Gehäuse verbindbar. Ein Steg 47 des dritten Differentials 41, der für das Ausführungsbeispiel gemäß Fig. 1 als Doppelsteg ausgebildet ist und zwei Planeten 10, 11 lagert, ist über die Bremse 40 mit dem Gehäuse verbindbar. Ein Hohlrad 12 des dritten Differentials 41 ist ständig mit der Getriebeausgangswelle 32 verbunden und über die Kupplung 42 mit der Zwischenwelle 46 verbindbar. Die Kupplung 37 kann auch entfallen, so dass an dieser Stelle keine Verbindung zwischen dem Doppelsteg 45 und dem Sonnenrad 5 möglich ist. In diesem Fall wird eine Kupplung 44 vorgesehen, über die selektiv das Hohlrad 8 mit dem Doppelsteg 45 verbindbar ist.The ring gear 4 of the second differential 35 for closed clutches 37 and 38 - and the sun gear 5 of the first closed clutch differential 38 - is / are connected to a sun gear 9 of the third differential 41 and can be connected to a housing via the brake 39. A web 47 of the third differential 41, which is designed as a double web for the embodiment according to FIG. 1 and supports two planets 10, 11, can be connected to the housing via the brake 40. A ring gear 12 of the third differential 41 is continuously connected to the transmission output shaft 32 and connectable via the coupling 42 with the intermediate shaft 46. The coupling 37 can also be omitted, so that at this point no connection between the double web 45 and the sun gear 5 is possible. In this case, a Clutch 44 is provided, via which selectively the ring gear 8 with the double web 45 is connectable.
Die in Fig. 2 dargestellte Variante eines Hybridgetriebes 30a unterscheidet sich gegenüber Fig. 1 im Aufbau der Radsatzstrukturen, nicht jedoch hinsichtlich der Belastungen der Elektromotoren und der Kupplungen. In diesem Fall sind das erste Differential 3βa und das dritte Differential 41a nicht mit zwei Planeten 2, 3 sowie 10, 11 ausgebildet, sondern vielmehr mit einzelnen Planeten 14, 21, so dass auch die Stege 43a und 47a als Einfachsteg ausgebildet sind. Bei im ansonsten im Wesentlichen Fig. 1 entsprechender Ausgestaltung treibt die Getriebeeingangswelle 31a in dem zweiten Differential 35a das Hohlrad 15 an, während der Steg 43a des zweiten Differentials 35a mit dem Doppelsteg 45a in Antriebsverbindung steht. Die Bremse 40a ist in diesem Fall mit einem Hohlrad 22 des dritten Differentials 41a verbunden, während der Steg 47a fest mit der Getriebeausgangswelle 32a verbunden ist.The variant of a hybrid transmission 30a shown in FIG. 2 differs from FIG. 1 in the construction of the wheelset structures, but not with regard to the loads on the electric motors and the clutches. In this case, the first differential 3βa and the third differential 41a are not formed with two planets 2, 3 and 10, 11, but rather with individual planets 14, 21, so that the webs 43a and 47a are formed as a single web. 1, the transmission input shaft 31a in the second differential 35a drives the ring gear 15, while the web 43a of the second differential 35a is in driving connection with the double web 45a. The brake 40a is in this case connected to a ring gear 22 of the third differential 41a, while the web 47a is fixedly connected to the transmission output shaft 32a.
Die unterschiedlichen Betriebsmodi der Hybridgetriebe 30, 30a ergeben sich aus der nachstehenden Tabelle:The different operating modes of the hybrid transmissions 30, 30a are shown in the following table:
Geschlossene SchaltelementeClosed switching elements
Betriebsmodusoperation mode
40 42 39 37; 44 (38)40 42 39 37; 44 (38)
1. Gang X X X1st gear X X X
2. Gang X X X2nd gear X X X
3. Gang X X X3rd gear X X X
4. Gang X X X4th gear X X X
1. Fahrbereich X X1st driving range X X
2. Fahrbereich X X2nd driving range X X
Seriell X XSerial X X
E-Fahrt X X Die Kupplung 37 bzw. 44 bewirkt im geschlossenen Zustand, dass sowohl das zweite Differential 35 als auch das erste Differential 36 im Block umlaufen. Die Varianten der Kupplung 37, 44 unterscheiden sich im geschlossenen Zustand durch die auftretende Momentenbelastung der Kupplung, während im geöffneten Zustand die Differenzdrehzahlen unterschiedlich sind.E-ride XX The clutch 37 and 44 causes in the closed state that both the second differential 35 and the first differential 36 rotate in the block. The variants of the clutch 37, 44 differ in the closed state by the occurring moment load of the clutch, while in the open state, the differential speeds are different.
Sind die Bremse 40 und die Kupplung 38 geschlossen, so arbeitet das Hybridgetriebe 30 im stufenlosen, leistungsverzweigten Fahrbereich 1. Durch eine entsprechende Regelung der Elektromotoren kann - ausgehend von unendlicher Übersetzung im Anfahrpunkt - das Getriebe in Richtung kleinerer Übersetzungen verstellt werden. Dabei sinkt die Differenzdrehzahl der (geöffneten) Kupplung 42 immer weiter ab. Sobald die Differenzdrehzahl zu Null wird, ist ein Synchronpunkt erreicht, d. h. eine Übersetzung, bei der idealerweise ein Wechsel von dem ersten Fahrbereich in einen zweiten stufenlosen Fahrbereich erfolgt. Im Gegensatz zu gestuften Getrieben erfährt in diesem Fall keines der beteiligten Getriebeelemente einen Drehzahlsprung. Die Kupplung 42 kann dann geschlossen werden, ohne dass die beiden Kupplungshälften aktiv synchronisiert werden müssen. Wird nur die Kupplung 42 betätigt, wechselt das Hybridgetriebe 30 in den zweiten Gang, dessen Übersetzung stets der Übersetzung entspricht, bei der die Differenzdrehzahl der Kupplung 42 gleich Null ist.If the brake 40 and the clutch 38 are closed, the hybrid transmission 30 operates in the stepless, power-split driving range 1. By means of an appropriate regulation of the electric motors, starting from infinite transmission at the starting point, the transmission can be adjusted in the direction of smaller ratios. In this case, the differential speed of the (open) clutch 42 continues to decrease. Once the differential speed becomes zero, a sync point is reached, i. H. a translation in which, ideally, a change from the first driving range takes place in a second stepless driving range. In contrast to stepped transmissions learns in this case none of the transmission elements involved a speed jump. The clutch 42 can then be closed without the two coupling halves must be actively synchronized. If only the clutch 42 is actuated, the hybrid transmission 30 changes to the second gear, whose ratio always corresponds to the ratio at which the differential speed of the clutch 42 is equal to zero.
Durch ein sich anschließendes Öffnen der Kupplung 40 wird in den zweiten Fahrbereich gewechselt. Für den Wechsel vom Fahrbereich 1 in den Fahrbereich 2 ist eine umgekehrte Reihenfolge der Betätigung der Schaltelemente erforderlich. Dabei kann durch paralleles Öffnen bzw. Schließen der beiden Schaltelemente 40, 42 auch direkt zwischen den stufenlosen Fahrbereichen hin- und hergeschaltet werden.By a subsequent opening of the clutch 40 is changed to the second driving range. For the change from the driving range 1 in the driving range 2, a reverse order of operation of the switching elements is required. It can by parallel opening or closing the two Switching elements 40, 42 also switched directly between the stepless driving ranges and forth.
Um die Brennkraftmaschine bei Fahrzeugstillstand oder im Schubbetrieb vollständig abstellen zu können, muss ein bezüglich des Abtriebs möglichst rückwirkungsfreies Wiederanlassen der Brennkraftmaschine möglich sein. Durch den Einsatz der optionalen Kupplung 38 kann das Getriebe in zwei völlig entkoppelte Hälften aufgeteilt werden (Modus "seriell"). Dabei ist das erste elektrische Antriebsaggregat 33 jeweils drehfest mit der Brennkraftmaschine verbunden, während das zweite elektrische Antriebsaggregat 34 mit der Getriebeausgangswelle 32 in Antriebsverbindung steht. Somit kann entweder aus dem Stand oder aus einer elektrischen Fahrt (mit dem zweiten elektrischen Antriebsaggregat 34) heraus die Brennkraftmaschine mit Hilfe des ersten elektrischen Antriebsaggregats 33 gestartet werden, ohne dass der Startvorgang der Brennkraftmaschine einen Einfluss auf das Abtriebsmoment hat.In order to be able to completely switch off the internal combustion engine when the vehicle is at a standstill or in overrun mode, it must be possible to restart the internal combustion engine with as little impact as possible with regard to the output. Through the use of the optional clutch 38, the transmission can be divided into two completely decoupled halves (mode "serial"). In this case, the first electric drive unit 33 is in each case rotatably connected to the internal combustion engine, while the second electric drive unit 34 is in drive connection with the transmission output shaft 32. Thus, either from a stand or from an electric drive (with the second electric drive unit 34), the internal combustion engine can be started with the aid of the first electric drive unit 33, without the starting process of the internal combustion engine having an influence on the output torque.
Zusätzlich kann in dem Modus "seriell" das erste elektrische Antriebsaggregat 33 bei laufender Brennkraftmaschine als Generator betrieben werden, der - etwa bei leerer Batterie - das zweite elektrische Antriebsaggregat 34 speist und somit beispielsweise eine dauerhafte elektrische Rückwärtsfahrt mit ausreichender Zugkraft garantiert.In addition, in the "serial" mode, the first electric drive unit 33 can be operated as a generator while the internal combustion engine is running, feeding the second electric drive unit 34, for example when the battery is empty, thus guaranteeing, for example, a permanent electric reverse drive with sufficient tractive force.
Wird auf die optionale Kupplung 38 aus Kosten- oder Bauraumgründen verzichtet, so entfällt der vorgenannte serielle Modus .If the optional clutch 38 is dispensed with for reasons of cost or space, the aforementioned serial mode is dispensed with.
Eine Rückwärtsfahrt erfolgt dann, sofern kein Rückwärtsgang mit fester Übersetzung vorgesehen ist, wie folgt: Die Bremse 40 ist geschlossen und ermöglicht es dem zweiten elektrischen Antriebsaggregat 34, das für ein gewünschtes Fahrmanöver benötigte Abtriebsmoment zur Verfügung zu stellen. Da durch die bei der elektrischen Fahrt vorteilhafterweise stillstehende Brennkraftmaschine eine weitere Drehzahl vorgegeben ist, insbesondere eine Drehzahl Null, liegen alle weiteren Drehzahlen fest. Somit wird das erste elektrische Antriebsaggregat 33 entweder bei der sich einstellenden Drehzahl mitgeschleppt oder gerade so weit bestromt, dass das Schleppmoment des ersten elektrischen Antriebsaggregats 33 nicht zusätzlich von dem zweiten elektrischen Antriebsaggregat 34 ausgeglichen werden muss.A reverse drive is then, if no reverse gear is provided with a fixed ratio, as follows: The brake 40 is closed and allows the second electric drive unit 34 to provide the output torque required for a desired driving maneuver. Since a further speed is predetermined by the in the electric drive advantageously stationary engine, in particular a speed zero, all other speeds are fixed. Thus, the first electric drive unit 33 is either entrained at the self-adjusting speed or just energized so far that the drag torque of the first electric drive unit 33 does not have to be compensated additionally by the second electric drive unit 34.
Bei leerem elektrischem Speicher muss die Rückwärtsfahrt im leistungsausgeglichenen Fahrbereich 1 erfolgen. Die zur Verfügung stehenden Abtriebsmomente sind in diesem Fall jedoch kleiner als im rein elektrischen Betrieb.When the electrical storage is empty, the reverse drive must take place in the power-balanced drive area 1. However, the available output torques are smaller in this case than in purely electrical operation.
Für die in Fig. 2 dargestellte Ausführungsvariante des Hybridgetriebes 30a treten geringfügig höhere Planetendrehzahlen auf als für das in Fig. 1 dargestellte Hybridgetriebe 30a. Zwischen den dargestellten Strukturen gemäß Fig. 1 und Fig. 2 sind weitere Abwandlungen möglich. So können beispielsweise das zweite Differential 35 und das dritte Differential 41 gemäß Fig. 1 unabhängig voneinander durch die jeweilige Lösung gemäß Fig. 2 ersetzt werden. For the embodiment variant of the hybrid transmission 30a shown in FIG. 2, slightly higher planetary rotational speeds occur than for the hybrid transmission 30a shown in FIG. Between the structures shown in FIG. 1 and FIG. 2 further modifications are possible. For example, the second differential 35 and the third differential 41 shown in FIG. 1 can be replaced independently of each other by the respective solution according to FIG.

Claims

Patentansprüche claims
1. Hybridgetriebe für ein hybrides Kraftfahrzeug mit1. Hybrid transmission for a hybrid motor vehicle with
- mindestens zwei leistungsverzweigten Fahrbereichen,- at least two power-split driving ranges,
- mindestens zwei diskreten Gangstufen,- at least two discrete gears,
- einer Getriebeeingangswelle (31), die in Antriebsverbindung mit einer Brennkraftmaschine steht oder bringbar ist, und einer Getriebeausgangswelle (32),a transmission input shaft (31), which is or can be brought into drive connection with an internal combustion engine, and a transmission output shaft (32),
- einem ersten elektrischen Antriebsaggregat (33) und einem zweiten elektrischen Antriebsaggregat (34), dadurch gekennzeichnet, dass in den Kraftfluss zwischen die Getriebeeingangswelle (31) und die Getriebeausgangswelle (32) drei Differentiale (35, 36, 41) zwischengeschaltet sind, die axial hinter den beiden zueinander benachbarten elektrischen Antriebsaggregaten (33, 34) angeordnet sind, wobei- A first electric drive unit (33) and a second electric drive unit (34), characterized in that in the power flow between the transmission input shaft (31) and the transmission output shaft (32) three differentials (35, 36, 41) are interposed, the axially behind the two mutually adjacent electric drive units (33, 34) are arranged, wherein
- die Getriebeeingangswelle (31) sowohl ein Getriebeelement (Hohlrad 8; Hohlrad 19) des ersten Differentiales (36) als auch ein Getriebeelement (Steg 43; Hohlrad 15) des zweiten Differentiales antreibt,the transmission input shaft (31) drives both a transmission element (ring gear 8, ring gear 19) of the first differential (36) and a transmission element (web 43, ring gear 15) of the second differential,
- das erste elektrische Antriebsaggregat (33) ein Getriebeelement (Sonnenrad 1; Sonnenrad 13) des zweiten Differentiales (35) antreibt, - das zweite elektrische Antriebsaggregat (34) sowohl mit dem ersten Differential (36) als auch dem dritten Differential (41) verbunden ist oder verbindbar ist.the first electric drive unit (33) drives a transmission element (sun wheel 1, sun gear 13) of the second differential (35), - The second electric drive unit (34) with both the first differential (36) and the third differential (41) is connected or connectable.
2. Hybridgetriebe nach Anspruch 1, dadurch gekennzeichnet, dass in einem ersten Differential (36)2. Hybrid transmission according to claim 1, characterized in that in a first differential (36)
- ein erstes Getriebeelement (Hohlrad 8) in Antriebsverbindung mit der Getriebeeingangswelle (31) steht,a first transmission element (ring gear 8) is in driving connection with the transmission input shaft (31),
- ein zweites Getriebeelement (Steg 45) unter Zwischenschaltung eines zweiten Differentiales (35) in Antriebsverbindung mit einem ersten elektrischen Antriebsaggregat (33) steht und- A second transmission element (web 45) with the interposition of a second differential (35) in driving connection with a first electric drive unit (33) and
- ein drittes Getriebeelement (Sonnenrad 5) in Antriebsverbindung mit dem zweiten elektrischen Antriebsaggregat (34) steht.- A third gear element (sun gear 5) in drive connection with the second electric drive unit (34).
3. Hybridgetriebe nach Anspruch 1 oder 2, dadurch gekennzeichnet, dass ein Schaltelement (37; 44) vorhanden ist, über welches das erste Differential (36) und das zweite Differential (35) jeweils und miteinander verblockt werden können.3. Hybrid transmission according to claim 1 or 2, characterized in that a switching element (37; 44) is provided, via which the first differential (36) and the second differential (35) can be respectively and locked together.
4. Hybridgetriebe nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, dass mindestens eine Schaltstellung von in den Kraftfluss zwischengeschalteten Schaltelementen (37, 38, 39, 40, 44) vorgesehen ist, in der a) lediglich ein elektrisches Antriebsaggregat (zweites elektrisches Antriebsaggregat 34) mit der Getriebeausgangswelle (32) in Antriebsverbindung steht und b) die Getriebeeingangswelle (31) und ein elektrisches Antriebsaggregat (erstes elektrisches Antriebsaggregat 33) ba) entkoppelt von der Getriebeausgangswelle (32) sind und bb) miteinander in Antriebsverbindung stehen.4. Hybrid transmission according to one of claims 1 to 3, characterized in that at least one switching position of intermediate in the power flow switching elements (37, 38, 39, 40, 44) is provided, in the a) only an electric drive unit (second electric drive unit 34) is in drive connection with the transmission output shaft (32) and b) the transmission input shaft (31) and an electric drive unit (first electric drive unit 33) ba) are decoupled from the transmission output shaft (32) and bb) are in drive connection with each other.
5. Hybridgetriebe nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass das zweite Differential (35) axial zwischen dem ersten Differential (36) und den elektrischen Antriebsaggregaten (33, 34) angeordnet ist.5. Hybrid transmission according to one of the preceding claims, characterized in that the second differential (35) axially between the first differential (36) and the electric drive units (33, 34) is arranged.
6. Hybridgetriebe nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass mit drei Differentialen (35, 36, 41) 4 Vorwärtsgänge, zwei stufenlose Fahrbereiche, ein serieller Fahrbereich und ein elektrischer Fahrbereich realisiert sind.6. Hybrid transmission according to one of the preceding claims, characterized in that with three differentials (35, 36, 41) 4 forward gears, two stepless driving ranges, a serial driving range and an electric driving range are realized.
7. Hybridgetriebe nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass ein Wechsel zwischen den stufenlosen Fahrbereichen an einem Synchronpunkt möglich ist.7. Hybrid transmission according to one of the preceding claims, characterized in that a change between the stepless driving ranges at a synchronization point is possible.
8. Hybridgetriebe nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass ein Wechsel von einem ersten stufenlosen Fahrbereich in einen Getriebegang ohne Synchronisation der in dem Getriebegang wirksamen Getriebeelemente (40, 42) erfolgt.8. Hybrid transmission according to one of the preceding claims, characterized in that a change from a first stepless driving range in a gear without synchronization of the transmission gear effective elements (40, 42) takes place.
9. Hybridgetriebe nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass dass zwei Bremsen (39, 40) und mindestens zwei Kupplungen (37, 38, 42) als Schaltelemente vorgesehen sind. 9. Hybrid transmission according to one of the preceding claims, characterized in that that two brakes (39, 40) and at least two clutches (37, 38, 42) are provided as switching elements.
10. Hybrides Kraftfahrzeug mit einem Antriebsstrang mit einem Hybridgetriebe (30) nach einem der Ansprüche 1 bis 9 dadurch gekennzeichnet, dass10. A hybrid motor vehicle with a drive train with a hybrid transmission (30) according to one of claims 1 to 9, characterized in that
- der Antriebsstrang als Standardantrieb ausgebildet ist,- The drive train is designed as a standard drive,
- die Erstreckung des Antriebsstranges ausgehend von der Brennkraftmaschine über die elektrischen Antriebsaggregate (33, 34) zu den Differentialen (35, 36, 41) quer zur Längsachse des Antriebsstranges abnimmt und- The extension of the drive train, starting from the internal combustion engine via the electric drive units (33, 34) to the differentials (35, 36, 41) transversely to the longitudinal axis of the drive train decreases and
- der Antriebsstrang in einen sich zwischen elektrischen Antriebsaggregaten (33, 34) und Differentialen (35, 36, 41) verjüngenden Fahrzeugtunnel integriert ist. - The drive train is integrated into a between vehicle electrical drive units (33, 34) and differentials (35, 36, 41) tapered vehicle tunnel.
EP06762177A 2005-06-30 2006-06-24 Hybrid gearbox Withdrawn EP1896282A1 (en)

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US7918756B2 (en) 2011-04-05
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DE102005030420A1 (en) 2007-01-11
CN101223046B (en) 2010-12-01

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