CN1821619A - Electrically variable transmission with selective fixed ratio operation - Google Patents

Abstract

An electrically variable transmission includes: an input member to receive power from an engine; an output member; first and second motor/generators; and first and second differentially geared planetary gear sets each having first, second and third gear members.

Description

Electrically variable transmission with selective fixed ratio operation

Quoting of related application

[0001] the application requires to have the preference of the U.S. Provisional Patent Application No.60/590427 that submitted on July 22nd, 2004, its content of this paper incorporated by reference.

Technical field

[0002] the present invention relates to a kind of transmission system of selectively actuatable, can separate under ratio coverage, one or two compound separation ratio coverage and two, three or four fixed speed ratios in input and operate.The invention still further relates to a kind of transmission system, have two transmitting assembliess that are generally planetary gear set that selectively are used for differential gearing, and three, four or five clutches with torque-transmitting mechanisms character.

Background technique

[0003] internal-combustion engine of internal-combustion engine, especially reciprocating piston type currently is used to promote most of vehicle.This motor is a kind of than greater efficiency, compactness, in light weight and inexpensive device, the high concentration transformation of energy of fuel form can be become useful mechanical work.Novel transmission system can be used with internal-combustion engine, reduces fuel consumption and pollutant and generates, and can be the public and brings very big interests.

[0004] vehicle has increased fuel consumption and discharging to the extensive variation of the requirement of internal-combustion engine, has exceeded the ideal situation of motor.Vehicle is promoted by this motor usually, is started by small motor and less storage battery under cold state, enters load condition rapidly by Driving force and supplementary equipment then.This motor is also being worked under speed and the large-scale load on a large scale, and average is approximately 1/5th of its peak output usually.

[0005] vehicle drive system is transferred to the remaining part of drive system, for example fixedly rear driving transmission, axle and wheel to mechanical work from motor usually.Typical machine driven system allows engine running to have degrees of freedom, but usually by five or six different driving ratios of alternate selection, neutral gear is selected, the fixture when it allows the power operation stationary vehicle; And clutch or torque converter, be used for seamlessly transitting between the drive ratio, and when motor still rotates from static startup vehicle.Transmission gear selection allows in the mode that the moment of torsion ratio increases and speed reduces the power of motor to be sent to the remaining part of drive system, perhaps reduce the mode that increases with speed to be called moment of torsion ratio that hypervelocity drives, perhaps the mode with the counter-rotating ratio transmits.

[0006] electric generator can be converted to electric energy with the mechanical energy from motor, and motor can convert electric energy to mechanical energy again, is used for the remaining part of driver for vehicle with different moments of torsion and speed.This configuration allows, and in the motor limit, changes moment of torsion and velocity rate between motor and the drive system remaining part continuously.Storage battery as the propulsion power source can add in this configuration, forms the series hybrid electric drive system.

[0007] serial hybrid system allow motor by moment of torsion, speed and the power required with promoting vehicle to a certain degree independently mode carry out work, therefore can control, to improve discharging and efficient motor.The motor that this system allows to be connected to motor comes ato unit as motor.This system also allows to be connected to the motor of drive system remaining part as generator, and the energy recovery that vehicle deceleration is produced by regenerative braking is in battery.The problem of series electrical drive system is, have with whole engine power be transformed to from mechanical energy electric energy generator and transformation of electrical energy be the weight and the cost of complete motor of the drive motor of mechanical energy, and the loss of useful energy in the conversion.

[0008] power separate transmission system can use the mode that is generally understood as " differential gearing " realize importing and exporting between the continuous variation of moment of torsion and velocity rate.The electricity variable ratio drive system can adopt differential gearing, sends the part of its through-put power by a pair of motor/generator.The remaining part of power transmits through another route in parallel, this route be decide ratio or can select to change, it is a complete mechanical and directly.

[0009] as known for the skilled artisan, a kind of differential gearing of form constitutes planetary gear set.Gear Planet Transmission is generally used for differential gearing the preferred embodiments of the present invention, and its advantage is compact, and different moment of torsion and velocity rate between all members of planetary gear set.But, can not adopt planetary pinion to realize the present invention, as adopting angular wheel or other gear, the rotating speed of at least one element of gear train is always the weighted mean value of two other element speeds.

[0010] vehicle mixing electric drive system also comprises one or more electrical energy storage devices.Typical devices is an electrochemical storage cell, but also can be electric capacity or mechanical device, drives flywheel as electricity.Storage battery allows the mechanical output work from the transmission system to the vehicle to be different from the mechanical input work of motor to transmission system.Battery or other device also make motor to start by transmission system, and the vehicle regenerative braking.

[0011] the electric variable ratio drive system of vehicle can be simply be sent to rear driving output with the mechanical energy of motor input.Carry out this operation, the electric energy balance that motor/generator produced is in the electric energy of electric loss and the consumption of another motor/generator.The mixing electricity variable ratio drive system of vehicle comprises storage battery, and therefore the electric energy of a motor/generator generation can be greater than or less than the electric energy that another consumes.The electric energy of battery allows two motor/generators all to be used as motor sometimes, helps motor when vehicle quickens.Two motors are sometimes as generator, to battery charge, especially when the vehicle regenerative braking.

[0012] the successful substitute products of series hybrid transmission system are that double range, the input of producing for bus at present separates and the compound electric variable ratio drive system that separates.This transmission system utilizes input mechanism to receive the power of vehicle motor, utilizes power take-off mechanism to transmit the motivational drive vehicle.First and second motor/generators are connected to energy storing device, as battery, make energy storing device to provide energy from the first and second motor/generator received energies or to it.Control unit is adjusted between energy storing device and the motor/generator and the stream of the energy between first and second motor/generators.

[0013] first or the operation of the second gear ratio operator scheme can realize selectively by clutch with first and second torque-transmitting mechanisms character.In first pattern, the input power separating rate forms by using first clutch than scope, and the output speed of transmission system is directly proportional with the speed of a motor/generator.In second pattern, the hybrid power separating rate forms by using second clutch than scope, and the output speed of transmission system is not directly proportional with the speed of any motor/generator, but the algebraically linear combination of the speed of two motor/generators.The operation of fixed conveyor velocity ratio can realize selectively by using two clutches.The operation of neutral mode transmission can realize selectively by discharging two clutches, and the output of transmission system is separated with two motor/generators with motor.

[0014] input of double range separation can be adopted two groups of Gear Planet Transmission or adopt three groups of Gear Planet Transmission with the compound electric variable ratio drive system that separates.In addition, part embodiment can adopt three torque-transmitting mechanisms, and two are used to the operator scheme of selecting transmission system required, can select to disconnect motor and transmission system for the 3rd.In other embodiments, all three torque-transmitting mechanisms are used for selecting the operator scheme of expecting.

Authorized on March 4th, [0015] 2003 people such as Holmes, a kind of electric variable ratio drive system is disclosed with the commonly assigned U.S. Patent No. 6527658 of present patent application, it utilizes two planetary gear set, two motor/generators and two clutches that input separation, compound separation, neutral gear and car backing operation pattern are provided.Two planetary gear set can be simple, and perhaps one can be compound separately.Automatically controlled product is adjusted energy storing device and is flowed with energy between two motor/generators.This transmission system provides electric speed change transmission (EVT) operation of two scopes of electricity or pattern, selectively provides the input power separating rate to compare scope than scope and hybrid power separating rate.A fixed speed is than selectively realizing.

Summary of the invention

[0016] the present invention improves the transmission system of above-mentioned prior art, strengthens the operation of transmission system by one or more other clutches are provided, and has realized that additional fixed speed ratio and additional hybrid power separating rate compare scope.An object of the present invention is provides the highest energy efficiency and discharging to given motor.In addition, also seek optimum performance, capacity, Package size and the ratio ranges of transmission system.

[0017] the fixed speed ratio is a kind of operational condition, and the mechanical energy of input transmission system mechanically is sent to output, and does not have energy stream need pass through motor/generator.The electricity variable ratio drive system can be realized the plurality of fixed velocity ratio near full engine power operation selectively, can be littler lighter for given maximum capacity.When operating under the condition of not using the motor/generator engine speed near its optimum value, fixing ratio operation can produce lower fuel consumption.

[0018] Yu only have a clutch to be used for two velocity range C1, the electric variable ratio drive system of the prior art of C2 is compared, and the present invention has reduced the energy stream by power path, reduces electric assembly cost and energy loss.By three-clutch C3 is provided, thereby a motor is lockable to transmission case, so that combine with the application of C2, provides additional fixed speed ratio, thus running up of allowing, and improved transmission efficiency.

[0019] four clutches C4 can be used as " lock-up clutch " or " directly driving clutch ", so that the element of a planetary gear set is locked together.This clutch allows transmission system to transmit moment of torsion and energy passes through two additional fixed speed ratios, the low speed ratio, and wherein C1 and C4 engage and by another planetary gear set speed are reduced; Direct drive ratio, wherein C2 and C4 engage.Compare with the similar ratio that only obtains by motor/generator and C1 or C2 clutch operating, the action of C4 clutch allows transmission system to transmit bigger moment of torsion and power with fixed ratio.The C4 clutch can be realized peak output, is used to transmit or the big load of traction and dilatory lorry or similar vehicles.C4 has realized being used of small electric assembly and high power engine, and its combination is very practical to individual lorry.

[0020] in addition, can add the 5th clutch C5,, and allow power path to engage separately so that separate mechanical path from motor to output.Input speed suddenly and unexpected the variation, for example start and during shutting engine down, need not influence and export and just can carry out.The C5 clutch makes motor/generator can powered vehicle advance or retreat, and separates another motor/generator and motor simultaneously.When the input separating ranges is used motor reverse direction actuation vehicle, opposite torque reaction appears, therefore discharge the continuous reversing ability that the C5 clutch can improve vehicle.

[0021] one aspect of the present invention provides a kind of new and electric variable ratio drive system novelty, as mentioned above, compares with the electric variable ratio drive system of prior art, has the complexity that obviously reduces.The U.S. Provisional Patent Application No.60/531528 that submitted on December 19th, 2003 has introduced the transmission system with input separating rate scope, compound separating rate scope and four fixed speed ratios, its content of this paper incorporated by reference.The present invention only adopts two planetary gear set to obtain the identical or improved result of essence.

[0022] another aspect of the present invention provides a kind of new and electric variable ratio drive system novelty, as mentioned above, compares with the electric variable ratio drive system of prior art, can make originally by significantly reduced one-tenth.The present invention achieves this end by using extra clutch, fixed speed ratio thereby permission electric device still less is provided, and has only used and carried out two planetary gear set that hybrid power separates minimum needs.

[0023] by reading these and other aspect of the present invention that following detailed description can be perfectly clear, and the advantage that is better than present prior art, can be by following introduction and open realization.

[0024] by whole introductory description, the electric variable ratio drive system of implementing notion of the present invention has from the input link of motor reception power and the output link that power is sent to the driving component that promotes vehicle.Be provided with first and second motor/generators and first and second planetary gear set.Each planetary gear set has internal gear member and external gear member, engages a plurality of planetary gear members with engagement system, and it is installed on the carrier in rotatable mode.Input link is connected to a member of first planetary gear set continuously, and output link is connected to a member of second planetary gear set continuously.A motor/generator is connected to another member of first planetary gear set continuously, and a member that is connected to second planetary gear set selectively.Second motor/generator is connected to all the other members of second planetary gear set continuously, and all the other members that are connected to first planetary gear set continuously.Perhaps, second motor/generator can be connected to all the other members of first planetary gear set selectively.

[0025] first torque-transmitting mechanisms C1 limits a member that is connected to second planetary gear set selectively, and the second torque-transmitting mechanisms C2 is connected to the internal gear member of first planetary gear set and the rotor that is connected to a motor/generator with the same member of second planetary gear set selectively.

[0026] optional the 3rd torque-transmitting mechanisms C3 described all the other members and second motor/generator that connect first and second planetary gear set selectively limits.Perhaps, optional the 3rd torque-transmitting mechanisms C3 described all the other members that can connect first planetary gear set selectively limit.

[0027] optional the 4th torque-transmitting mechanisms C4 links together two members of transmission system selectively at least, and the member that makes the planetary gear set of winning is with identical speed co-rotation.Optional the 4th torque-transmitting mechanisms C4 can be connected to a member of first planetary pinion group another member of first planetary pinion group selectively.Perhaps, optional the 4th torque-transmitting mechanisms C4 member that can be selectively all the other members and second motor/generator of first and second planetary gear set be connected to first planetary gear set that is connected with input link.

[0028] optional the 5th torque-transmitting mechanisms C5 disconnects all the other members of first planetary gear set selectively and connecting from all the other members of second planetary gear set and second motor/generator.Therefore, all the other members of first planetary gear set can be selectively or are connected to all the other members and second motor/generator of second planetary gear set continuously, depend on whether the C5 clutch is provided with.

[0029] another aspect of the present invention provides a kind of electric variable ratio drive system, comprising: the input link that receives power from motor; Output link; First and second motor/generators; And the first and second differential gearing planetary gear set that respectively have first, second and the 3rd gear part.Input link is connected to first member of first planetary gear set continuously, and output link is connected to first member of second planetary gear set continuously.First motor/generator is connected to second member of first planetary gear set continuously, and second member that is connected to second planetary gear set selectively.Second motor/generator is connected continuously with the 3rd member of second planetary gear set.First torque-transmitting mechanisms limits second member of second planetary gear set selectively.Second torque-transmitting mechanisms is connected to second member of second planetary gear set second member of first planetary gear set selectively.The 3rd torque-transmitting mechanisms limits the 3rd member of first planetary gear set selectively.The 4th torque-transmitting mechanisms links together two of member selectively at least, and all members that make the planetary gear set of winning are with identical speed co-rotation.The 5th torque-transmitting mechanisms is connected the 3rd member of first planetary gear set selectively with the 3rd member of second planetary gear set.

[0030] first, second of planetary gear set and the 3rd member can comprise ring gear, sun gear and the carrier of any order.First, second of first planetary gear set and the 3rd member preferably comprise ring gear, sun gear and carrier respectively, and first, second and the 3rd member of second planetary gear set comprise carrier, ring gear and sun gear respectively.

[0031] another aspect of the present invention provides a kind of electric variable ratio drive system, comprising: the input link that receives power from motor; Output link; First and second planetary gear set that respectively have first, second and the 3rd gear part; Be connected to first and second motor/generators of the member of planetary gear set; And at least four selectable torque-transmitting mechanisms that also are connected to the member of planetary gear set.Torque-transmitting mechanisms is optionally connected to close ground at least in conjunction with two, and when increasing with the output speed of convenient transmission system, order provides input split pattern, compound split pattern and output split pattern.This sequence caters to the need most, because can make energy loop minimum.

[0032] each power split pattern is failed the ratio ranges of operating before having energy, and one or more ratio ranges of energy circuit operation.In the defeated operation, the energy of motor/generator flow to output according to the direction that is input to output before the energy of hope, and it is parallel to by the energy stream from the transmission system that is input to output.In undesirable energy circuit operation, the energy of motor/generator flows according to the direction that outputs to input, forms the energy loop, and flows greater than intake or output energy by the energy of transmission system.

[0033] relative input speed, the input separating ranges of velocity ratio is the most useful for low output speed, because the input separating ranges has from the defeated operation before the energy of certain ratio of zero output speed, is the energy circuit operation of higher output speed then.Relative input speed, the output separating ranges of operation is the most useful for high output speed, because the output separating ranges has the energy circuit operation that is lower than certain ratio, is the preceding defeated operation of energy of higher output speed then.

[0034] read following the following detailed description of the embodiment of the present invention in conjunction with the drawings, above-mentioned feature and advantage of the present invention and further feature and advantage become very obvious.

Description of drawings

[0035] Fig. 1 is a schematic symbol diagram, has shown a kind of preferred form of realizing the electric variable ratio drive system of notion of the present invention in the front-wheel drive transmission system, wherein is provided with four torque-transmitting mechanisms;

[0036] Fig. 2 is the clutch joint of transmission system under the different operating condition and the chart of motor/generator operation of explanatory drawing 1;

[0037] Fig. 3 is a schematic symbol diagram, has shown the another kind of preferred form of realizing the electric variable ratio drive system of notion of the present invention in the rear wheel drive transmission system, wherein is provided with four torque-transmitting mechanisms;

[0038] Fig. 4 is a schematic symbol diagram, has shown the another preferred form of realizing the electric variable ratio drive system of notion of the present invention in the rear wheel drive transmission system, wherein is provided with five torque-transmitting mechanisms;

[0039] Fig. 5 is the chart of the clutch joint of transmission system under the different operating condition of explanatory drawing 4;

[0040] Fig. 6 is a schematic symbol diagram, has shown the another kind of preferred form of realizing the electric variable ratio drive system of notion of the present invention in the front-wheel drive transmission system, wherein is provided with four torque-transmitting mechanisms.

Embodiment

The U.S. Patent No. 6527658 of authorizing people such as Holmes on March 4th, [0041] 2003 discloses a kind of two planetary gear set, two motor/generators and two clutches of utilizing the electric variable ratio drive system of importing separation, compound separation, neutral gear and car backing operation pattern is provided, and this paper is with reference to quoting its content.The invention provides a kind of have one, the structure of the similar performance improved of two or three extra clutch.

[0042] earlier specifically with reference to Fig. 1, a preferred embodiment of improved electric variable ratio drive system is generally by label 10 expressions.Transmission system 10 is designed to receive at least a portion of the driving power of motor 12.As shown in the figure, motor 12 has output shaft 14, and output shaft is as the input link forward of instantaneous torque damper 16, and damper comprises input clutch 17.The instantaneous torque damper is well known in the art, and irrelevant with the specific instantaneous torque damper 16 that is adopted, its output link is as the input link 18 of transmission system 10, as following more complete description.

[0043] in described embodiment, motor 12 can be the fossil fuel motor, as diesel engine, is suitable for providing the power output of carrying with per minute constant revolution (RPM) usually.

[0044] to be connected to the mode of transmission input link 18 irrelevant with motor 12, and transmission input link 18 is connected to the planetary gear set 20 of transmission system 10.

[0045] transmission system 10 preferably adopts two differential gear set with planetary gear set character.First planetary gear set 20 adopts the external gear member 22 that is typically expressed as ring gear.Ring gear 22 is around the internal gear member 24 that is typically expressed as sun gear.Carrier 26 rotatably supports a plurality of planetary pinions 28,29, makes each planetary pinion 28 engage outer ring gear part 22 with engagement system, and each planetary pinion 29 engagement engages the interior sun gear member 24 of first planetary gear set 20.Input link 18 is fixed to the ring gear member 22 of first planetary gear set 20.

[0046] second planetary gear set 32 also has the external gear member 34 that is typically expressed as ring gear, its external internal gear member 36 that is typically expressed as sun gear.A plurality of planetary pinions 38 are rotatably installed on the carrier 40, make each planetary gear members 38 engage the outer ring gear part 34 and the interior sun gear member 36 of second planetary gear set 32 simultaneously with engagement system.

[0047] planetary gear set 20 is compound, and planetary gear set 32 is simple.The interior sun gear 36 of second planetary gear set 32 is attached to the carrier 26 of first planetary gear set 20 by central shaft 42.

[0048] first preferred embodiment 10 also combines first and second motor/ generators 46 and 48 respectively.The stator 50 of first motor/generator 46 is fixed to the internal surface 52 of the ring-type of transmission system housing 54.The rotor 56 of first motor/generator 46 is fixed to sleeve 58.The interior sun gear 24 of first planetary gear set 20 is fixed to the front end of sleeve 58, and the opposite end of sleeve 58 is terminated at radially the flanged plate 60 that extends, and the surface of contact that it constitutes with clutch component will be introduced below.

The stator 66 of [0049] second motor/generator 48 also is fixed to the internal surface 52 of the ring-type of transmission system housing 54.The rotor 68 of second motor/generator 48 is fixed to central shaft 42, such first and second planetary gear set 20 and 32 further compound.

[0050] two planetary gear set 20 and 32 and two motor/ generators 46 and 48 can coaxially be provided with, for example around the central shaft 42 that axially is provided with.This configuration guarantees the monolithic case of transmission system 10, and promptly circumferential size can be minimum.

The ring gear 34 of [0051] second planetary gear set 32 is restricted to housing 54 selectively by the first clutch parts with torque-transmitting mechanisms 62 (C1) character.That is to say that the ring gear 34 of restriction is fixing selectively by being connected to the housing 54 that does not rotate, and prevents to rotate.The ring gear 34 of second planetary gear set 32 also is connected to radially extension flange plate 60 selectively by the second clutch parts with torque-transmitting mechanisms 64 (C2) character.First and second torque- transmitting mechanisms 62 and 64 help to select the operator scheme of hybrid powertrain system 10, with more completely explanation below.

[0052] the 3rd torque-transmitting mechanisms 65 (C3) is connected to transmission system housing 54 with carrier 26, sun gear 36 and rotor 68 selectively.Therefore, this torque-transmitting mechanisms makes second motor/generator 48 be locked into the transmission system housing, at torque-transmitting mechanisms 64 (C2) when also engaging, provide additional fixedly than.

[0053] the 4th torque-transmitting mechanisms 67 (C4) is as " locking " clutch, so that ring gear member 22 is locked onto carrier 26.This torque-transmitting mechanisms allows transmission system to transmit moment of torsion and energy passes through two additional fixed speed ratios, the low speed ratio, and wherein torque-transmitting mechanisms 62 (C1) and 67 (C4) engage; With direct drive ratio, wherein torque-transmitting mechanisms 64 (C2) and 67 (C4) engage.With compare by the similar speed ratio of C1 or C2 clutch and motor/generator single movement, allow transmission system with fixing than transmitting bigger moment of torsion and power.Lock-up clutch can realize peak output fast, be used for transmission, the traction and dilatory of vehicles such as individual lorry, provide simultaneously four available fixedly than, and can be at least one mechanical. points of first pattern, at least two mechanical. points operations of second pattern, promptly three mechanical. points have three independent speed of a motor vehicle separately.

[0054] the output driving component 70 of transmission system 10 is fixed to the carrier 40 of second planetary gear set 32.Output driving component 70 can have the peripheral gear teeth (not shown), engages the gear (not shown) that the transmission case (not shown) provides by engagement system, can be used as differential to two respective drive axles.This configuration is preferably used in f-w-d vehicle.Should also be appreciated that output driving component 70 can drive or other similar mechanical connection mechanism transmits output power to transmission case by chain.

[0055] introduce power supply now, from the above description and by should be very clear with reference to Fig. 1, transmission system 10 selectively receives power from motor 12.Will illustrate that now hybrid powertrain system is also from power supply 82 received energies.Power supply 82 can be one or more batteries.Have provide or store and distribute other power supply of electric energy, as fuel cell, can be used to replace battery, this does not change notion of the present invention.As the introduction that binding engine 12 and motor/ generator 46,48 are carried out, should be appreciated that equally the power output of power supply neither key of the present invention.

[0056] power supply 82 is communicated with electric control unit ECU84 by electric conductor 86A and 86B.ECU 84 is communicated with first motor/generator 46 by electric conductor 86C and 86D, and ECU 84 is communicated with second motor/generator 48 by electric conductor 86E and 86F in the same manner.

[0057] can find out that from the introduction of a last joint specified structure spare, parts or mechanism can be used for a more than position.When the structural member that relates to the sort of type, parts or mechanism, adopt same numbers to represent.But, when structural member, parts or a mechanism of sign when identifying separately, will be by representing with the letter suffix of the combination of numbers of marking structure spare, parts or mechanism.Like this, six electric conductors are arranged by numeral 86 signs, but specific independent electric conductor is designated 86A, 86B, 86C, 86D, 86E and 86F in explanation and accompanying drawing.This identical suffix convention will be used for whole explanation.

Overall operation

[0058] master control set is known driving scope selector (not shown), and it instructs traditional electronic control unit ECU 84 to dispose parking, reversing, neutral gear or the forward drive scope of transmission system.The second and the 3rd master control set constitutes accelerator pedal (not shown) and braking pedal (not shown equally).ECU is shown " operator's demand " from the information table that these three main control sources obtain.ECU also obtains the information about following state from a plurality of sensors (input and output): torque-transmitting mechanisms (apply or discharge); Engine output torque; The capacitance grade of standard cell or battery pack; And the temperature of selected vehicle component.ECU determines desired situation, handles the parts of selectively actuatable transmission system or related with it of respective operations person's demand then.

[0059] the present invention adopts simple and compound planetary gear set.In the simple planetary group, one group of planetary pinion is supported, and can rotate on self rotatable carrier.

[0060] in the simple planetary group, when sun gear keeps static and power when being applied to the ring gear of simple planetary group, planetary pinion rotates with the power that is applied to ring gear, thereby rotate around the fixed stars circumference of gear, make carrier rotate along the direction identical with the ring gear sense of rotation.

[0061] when any two members of simple planetary group rotated with equidirectional and with identical speed, the 3rd member was forced to identical speed and equidirectional rotation.For example, when sun gear rotated with equidirectional and identical speed with ring gear, planetary pinion was not the axle rotation around himself, but as voussoir whole unit is locked jointly to realize so-called direct driving.That is to say that carrier is along with fixed star and ring gear rotate together.

[0062] still, when two gear parts rotate with the equidirectional rotation but with friction speed, the direction that the 3rd gear part rotates is normally determined by visual analysis, but in many cases, direction is not significantly, and can only accurately determine by the number of teeth of understanding all gear members of planetary gear set.

[0063] when carrier restraint of liberty rotation and power were applied to sun gear or ring gear, planetary pinion spare was as empty wheel.Like that, driven member is to rotate with the actuator opposite direction.Like this, in many transmission system configurations, when selecting the reverse-drive scope, be activated with friction mode, stop it to rotate, make the power that is applied to sun gear that ring gear is rotated in the opposite direction thereby engage carrier as the torque-transmitting mechanisms that brakes.Like this, if ring gear is connected to the driving wheel of vehicle, can the reverse sense of rotation of driving wheel of this configuration, thereby the direction of counter-rotating vehicle itself.

[0064] in simple planetary gear set, if any two rotating speeds of sun gear, planet carrier and ring gear are known, then the speed of the 3rd member can adopt simple rule to determine.The rotating speed of carrier is directly proportional with the speed of fixed star and ring gear all the time, comes weighting according to its corresponding number of teeth.The number of teeth of the sun gear twice during for example, ring gear can have mutually on the same group.The speed of carrier then is 1/3rd sums of 2/3rds and sun gear speed of ring gear speed.If one of them rotates these three members in the opposite direction, then the symbol to that member speed is negative in mathematical computations.

[0065] moment of torsion of sun gear, carrier and ring gear also can be relative to each other simply, if do not consider the quality of gear, the acceleration of gear or the frictional force in the gear train, these factors have slight influence in the transmission system of well designed.The moment of torsion that is applied to the sun gear of simple planetary group must balance be applied to the moment of torsion on the ring gear, and it is proportional to the number of teeth of these gears.For example, the moment of torsion that is applied to the ring gear of the number of teeth with the sun gear that doubles that group must be the twice that is applied to sun gear, and must apply with equidirectional.The moment of torsion that is applied to carrier must quantitatively equal moment of torsion on the sun gear and the moment of torsion sum on the ring gear, but direction is opposite.

[0066] in the dual planetary gear group, to compare with the simple planetary group, planetary interior and outer group has realized the exchange of ring gear and planet carrier function.For example, static if sun gear keeps, then the planet carrier will rotate with the direction identical with ring gear, but have planetary in and the planet carrier of outer group will move quickly than ring gear, rather than move slower.

[0067] in having planet gear meshed and in the dual planetary gear group of outer group, the speed of ring gear is directly proportional with the speed of sun gear and planet carrier, adds wooden fork according to the number of teeth of sun gear and the number of teeth of planetary pinion filling respectively.For example, the difference between ring gear and the planetary pinion sun gear of filling may be on the same group the twice of the sun gear number of teeth mutually.In this case, the speed of ring gear will be 1/3rd sums of 2/3rds and fixed star speed of bearer rate.If sun gear or planet carrier rotate in the opposite direction, then the symbol of that speed is negative in the mathematical computations.

[0068] static if sun gear keeps, then having will be according to the direction rotation identical with the rotary annular gear of this group with the carrier of outer group in the planetary pinion.On the other hand, static if sun gear keeps, and carrier is activated, interior group the planetary pinion that then engages sun gear rolls or " rotations " along sun gear, rotates with the equidirectional of carrier rotation.To rotate in the opposite direction with outer group small gear of interior group pinion, thereby promote the ring gear of engagement in the opposite direction, but just mesh the planetary pinion that engages with ring gear relatively.

Planetary pinion in the outer group drives along the direction of carrier.Effect that small gear in the outer group rotates around himself axle and the planetary pinion in the outer group combine because of the greater role of the orbiting that the motion of carrier produces, thereby annular rotates according to the direction identical with carrier, but it is fast to be not so good as the speed of carrier.

[0069] static if the carrier in this dual planetary gear group keeps, and the sun gear rotation, then ring gear will be to rotate than low speed and the direction identical with sun gear.If the maintenance of the ring gear of simple planetary group is static, and the sun gear rotation, then supporting the planetary carrier of single group will be to reach the direction rotation identical with sun gear than low speed.Like this, compare with the planetary use of single group in the simple planetary group, be easy to observe by use in the intermeshing planetary pinion and carrier that outer group is produced and ring gear between the exchange that acts on.

[0070] routine of electric variable ratio drive system action be with mechanical energy from the input transfer to output.As the part of this transmission system action, a generator in two motor/generators as electric energy.Another motor/generator is as motor, and the use electric energy.Along with the speed of exporting is increased at a high speed from zero, two motor/generators exchange the effect of its generator and motor gradually, and may carry out this operation more than once.These exchanges take place around mechanical. points, mechanical. points basically all energy that are input to output mechanically transmit, do not have energy to transmit in electric mode.

[0071] in the electric variable ratio drive system of mixing system, storage battery also can provide energy to transmission system, and perhaps transmission system provides energy to battery.If battery provides sufficient electric energy to transmission system, for example be used for vehicle and quicken, then two motor/generators can be used as motor.If transmission system provides electric energy to battery, for example during regenerative braking, then two motor/generators can be used as generator.Near the position of the mechanical. points of operating, two motor/generators also can be used as the generator with little electric energy output, because of there being electric loss in the system very.

[0072] opposite with the routine action of transmission system, in fact transmission system can be used for mechanical energy is sent to input from output.This can carry out in vehicle, so that replenish the regenerative braking of vehicle brake and enhancing or additional vehicle, especially at long down ramp.If through the energy stream counter-rotating by this way of transmission system, then the effect of motor/generator will be opposite with the effect of routine action.

First embodiment's operation

[0073] Fig. 2 is a chart, has shown the motor/generator operation of transmission system shown in Figure 1 torque-transmitting mechanisms 62,64,65 and 67 clutch engagement and motor/ generator 46,48 under the different operating condition.

[0074] in reversing mode 1, torque-transmitting mechanisms 62 engages, but motor 12 retaining ring generating gear members 22 (having only electricity to drive), second motor/generator 48 drives sun gear member 36, its rotation vector 40 is to drive output 70, first motor/generator 46 drives via sun gear member 24 and carrier 26 simultaneously, and wherein sun gear keeps static by motor 12.Therefore, motor/generator 48 drives in the opposite direction, and motor/generator 46 drives.Motor 12 can be also antiport not.

[0075] therefore, as mentioned above, if vehicle operators is selected car backing operation, then torque-transmitting mechanisms 62 engages, and the outer ring gear 34 that limits second planetary gear set 32 is connected to housing 54.Further operation response person's demand, ECU 84 counter-rotatings are transported to the polarity of electric energy of the stator 66 of second motor/generator 48.The rotation of the rotor 68 of motor/generator 48 is then reverse with sense of rotation, and this sense of rotation is related with first or the preceding promotion of the input operator scheme of separating.Under these conditions, the carrier 40 that the interior sun gear 36 of second planetary gear set 32 drives in the planetary set 32 moves to the outer ring gear 34 of restriction, realizes carrier 40 and the revolution of those members in relative rotation in preceding pushing course of output driving component 70.Thereby realize the operation of reversing mode.

[0076] in forward mode 1, be suitable for the same terms of above-mentioned reversing mode 1, but compare with reversing mode 1, motor/generator starts with opposite sense of rotation electricity.

[0077] fixing at gear 1, the first than realizing not having energy to transmit simultaneously by motor/ generator 46,48 by engage torque transfer mechanism 62 and 67.

[0078] in electric speed change pattern 1, torque-transmitting mechanisms 62 engages, the input split pattern realizes, because power separates after ring gear member 22 enters first planetary gear set, by carrier 26, sun gear member 36, carrier 40 arrive the mechanical path of exporting 70 and the power path that passes through sun gear 24, motor/generator 46, motor/generator 48, sun gear member 36, carrier 40 excessively.Motor/generator 46 is driven by sun gear member 24, and motor/generator 46 helps to be in the motor/generator 48 of drive pattern (promptly as motor).Like this, transmission system 10 utilizes the ring gear 22 of first planetary gear set 20 to receive the power that motor 12 is provided, and utilizes the carrier 26 of same planetary gear set to provide power by the motor/generator 48 as motor work to central shaft 42.Simultaneously, transmission system 10 utilizes second planetary gear set 32 to amplify the moment of torsion that the sun gear 36 by second planetary gear set 32 receives, and is applied to the reaction force that carrier 40 applies with the ring gear 34 that prevents to be restricted and is delivered to output driving component 70.

[0079] in electric speed change pattern 2, have only torque-transmitting mechanisms 64 to engage, and compound lock out operation is realized.Motor/generator 46 is in drive pattern, and motor/generator 48 is driven.In compound split pattern, transmission system utilize identical two planetary gear set 20 and 32 provide input link 18, two motor/ generators 46 and 48 and output driving component 70 between transmission, make energy stream be divided into machinery and power path at the input and the output terminal of transmission system.

[0080] fixing at gear 2, the second than realize not having energy to transmit simultaneously by engage torque transfer mechanism 62 and 64 by motor/ generator 46,48.

[0081], realizes not having energy to pass through motor/ generator 46,48 simultaneously and transmit by engage torque transfer mechanism 64 and 67 as the 3rd fixing ratio of 1: 1 direct drive ratio at gear 3.

[0082] fixing at gear 4, the four than realizing not having energy to transmit simultaneously by engage torque transfer mechanism 64 and 65 by motor/ generator 46,48.

[0083] also have neutral mode, wherein, rotate freely by a member that allows second planetary gear set 32, the input link 18 of motor 12 disconnects with output driving component 70 effectively with two motor/ generators 46,48 and being connected.That is to say that two torque-transmitting mechanisms 62 and 64 are thrown off, thereby allow the external gear member 34 of second planetary gear set 32 to rotate freely, therefore realize neutral mode.

Second embodiment's explanation

[0085] specifically with reference to Fig. 3, another preferred embodiment of improved electric variable ratio drive system is by label 110 signs.The functional unit of Fig. 3 is similar to Fig. 1 in fact, therefore identical label list diagrammatic sketch 1 and the same parts among Fig. 3.In Fig. 3, the transmission system of Fig. 1 reconfigures in the rear wheel drive design.Comprise four torque-transmitting mechanisms shown in Figure 1, and according to the chart work of Fig. 2.

[0086] transmission system 110 of Fig. 4 can be from the input power of motor 112 receiving parts.In described embodiment, motor 112 can also be the fossil fuel motor, as diesel engine, is fit to provide the power output of carrying with per minute constant revolution (RPM) usually.As shown in the figure, motor 112 has output shaft 114, and also as the input link forward of instantaneous torque damper 116, damper comprises input clutch 117 for it.The output link of instantaneous torsional damper 116 is as the input link 118 of transmission system 110.

[0087] to be connected to the mode of transmission system input link 118 irrelevant with motor 112, and transmission system input link 118 is connected to the planetary gear set 120 in the transmission system 110 in operation.

[0088] transmission system 110 adopts two planetary gear set.First is a dual planetary gear group 120, also adopts the external gear member 122 that is typically expressed as ring gear.The also external internal gear member 124 that is typically expressed as sun gear of ring gear 122.But the bearing assembly 126 in the planetary gear set 120 supports two groups of planetary pinions 128 and 129 with rotation mode.Sun gear 124 in a plurality of planetary pinions 129 engage with engagement system simultaneously.Each planetary pinion 129 engages a unique adjacent planetary pinion 128 with engagement system.Each planetary pinion 128 engages outer ring gear part 122 with engagement system simultaneously.Each planetary pinion 128 engages a unique adjacent planetary pinion 129 with engagement system again.

[0089] input link 118 is fixed to the ring gear member 122 of dual planetary gear group 120.

[0090] second planetary gear set 132 is simple planetary groups, and has the external gear member 134 that is typically designed to ring gear, the external internal gear member 136 that is typically designed to sun gear.As the typical case in the simple planetary group, a plurality of planetary pinions 138 are to be rotatably installed in the carrier 140, make each planetary gear members 138 engage the outer ring gear part 134 of second planetary gear set 132 simultaneously with engagement system, and interior sun gear member 136, but pinion member 138 is not bonded with each other.

[0091] in addition, first and second planetary gear set 120 and 132 make up mutually, because the interior sun gear 136 of second planetary gear set 132 is attached to the bearing assembly 126 of dual planetary gear group 120 by central shaft 142.That is to say that the front end of central shaft 142 is terminated at the radially extension flange part 144 of the bearing assembly 126 that is fixed to dual planetary gear group 120.

[0092] second preferred embodiment 110 also combines first and second motor/ generators 146 and 148 respectively.The stator 150 of first motor/generator 146 is fixed to the internal surface 152 of the ring-type of transmission system housing 154.The rotor 156 of first motor/generator 146 is fixed to sleeve 158.The interior sun gear 124 of first planetary gear set 120 also is fixed to sleeve 158.

The ring gear 134 of [0093] second planetary gear set 132 can be restricted to housing 154 selectively by first torque-transmitting mechanisms 162 (C1).That is to say that the ring gear 134 of restriction is fixing selectively by being connected to the housing 154 that does not rotate, and prevents to rotate.The ring gear 134 of second planetary gear set 132 also is connected to radially extension flange plate 160 selectively by second torque-transmitting mechanisms 164 (C2).First and second torque-transmitting mechanisms 162 and 164 usefulness help select the operator scheme of hybrid powertrain system 110.

[0094] carrier 12 6 is restricted to the transmission system housing selectively via torque-transmitting mechanisms 165 (C3).Carrier 12 6 also is connected to ring gear member 122 selectively via torque-transmitting mechanisms 167 (C4).

The stator 166 of [0095] second motor/generator 148 also is fixed to the internal surface 152 of the ring-type of transmission system housing 154.The rotor 168 of second motor/generator 148 is fixed to the carrier 12 6 of dual planetary gear group 120.

[0096] two planetary gear set 120 and 132 and two motor/ generators 146 and 148 can be according to the coaxial manner settings, for example around the central shaft 142 and the input link 118 that axially are provided with.This configuration guarantees the monolithic case of transmission system 110, and promptly circumferential size can be minimum.

[0097] the output driving component 170 of transmission system 110 is fixed to the carrier 140 of second planetary gear set 132.

[0098] operation of transmission system 110 is described identical with reference to Fig. 2 to transmission system 10 with top.

The 3rd embodiment's explanation

[0099] Fig. 4 has again shown the transmission system 210 of a third embodiment in accordance with the invention.This transmission system is similar to the transmission system 10 and 110 of Fig. 1 and Fig. 3 on function and structure, but has added the 5th clutch.

[00100] as shown in the figure, transmission system 210 comprises input link 218, receives power and sends power to first planetary gear set 220 via ring gear member 222 from motor 212.

[00101] transmission system 210 adopts two planetary gear set.First is a dual planetary gear group 220, adopts the external gear member 222 that is typically designed to ring gear.The also external internal gear member 224 that is typically designed to sun gear of ring gear 222.But the bearing assembly 226 in the planetary gear set 220 rotatably supports two groups of planetary pinions 228 and 229.Sun gear 224 in a plurality of planetary pinions 229 engage with engagement system simultaneously.Each planetary pinion 229 engages a unique adjacent planetary pinion 228 with engagement system.Each planetary pinion 228 engages outer ring gear part 222 with engagement system simultaneously.Each planetary pinion 228 engages a unique adjacent planetary pinion 229 with engagement system again.

[00102] second planetary gear set 232 is simple planetary groups, and has the external gear member 234 that is typically designed to ring gear, its external internal gear member 236 that is typically designed to sun gear.Typical case as the simple planetary group, a plurality of planetary pinions 238 are installed in the carrier 240 in rotatable mode, make each planetary gear members 238 engage the outer ring gear part 234 and the interior sun gear member 236 of second planetary gear set 232 simultaneously with engagement system, but pinion member 238 is not bonded with each other.

[00103] transmission system 210 also combines first and second motor/ generators 246 and 248 respectively.The stator 250 of first motor/generator 246 is fixed to the internal surface 252 of the general ring-type of transmission system housing 254.The rotor 256 of first motor/generator 246 is fixed to the interior sun gear 224 of first planetary gear set 220.

The ring gear 234 of [00104] second planetary gear set 232 can be restricted to housing 254 selectively by first torque-transmitting mechanisms 262 (C1).That is to say that the ring gear 234 that is restricted is fixing selectively by being connected to the housing 254 that does not rotate, and prevents to rotate.The ring gear 234 of second planetary gear set 232 also is connected to sun gear member 224 selectively by second torque-transmitting mechanisms 264 (C2).First and second torque-transmitting mechanisms 262 and 264 usefulness help select the operator scheme of hybrid powertrain system 210.

[00105] carrier 226 is restricted to the transmission system housing selectively via torque-transmitting mechanisms 265 (C3).Sun gear member 224 also is connected to sun gear member 236 selectively via torque-transmitting mechanisms 267 (C4).

[00106] the 5th torque-transmitting mechanisms 268 (C5) is connected carrier 226 selectively with sun gear member 236.

The stator 266 of [00107] second motor/generator 248 also is fixed to the internal surface 252 of the ring-type of transmission system housing 254.The rotor 268 of second motor/generator 248 is fixed to the sun gear member 236 of dual planetary gear group 220.

[00108] two planetary gear set 220 and 232 and two motor/ generators 246 and 248 can be according to the coaxial manner settings, for example around the central shaft 242 that axially is provided with.This configuration guarantees the monolithic case of transmission system 210, and promptly circumferential size can be minimum.

[00109] the output driving component 270 of transmission system 210 is fixed to the carrier 240 of second planetary gear set 232.

[00110] caption of Fig. 5 the clutch under the different operating condition of the transmission system of Fig. 4 engage.For example, just in the power mode (E1), clutch 262 and 267 engages.Two motors can carry out the limit that the task driven vehicle advances or retreats into its combined torque and power, and the battery limit, and do not import or lock-up clutch.

[00111] in series hybrid pattern (S1), clutch 262 and 265 engages (clutch to clutch between the clutch 267 and 265 moves), and arrive first motor/generator 246, arrive second motor/generator 248 by second planetary gear set 232 by first planetary gear set 220 from the power of motor, arrive output 270.Series hybrid pattern (S1) can be used for engine start and stops.

[00112] in variable gear ratio pattern (V1), clutch 262 and 268 engages, and electric variable gear ratio (after moving between clutch 265 and 268) is provided in the input split pattern.

[00113] first is fixing than realizing that at fixed gear (F1) clutch 262,267 and 268 engages at that time.Second is fixing than realizing that at fixed gear (F2) clutch 262,264 and 268 engages at that time.The 3rd is fixing than realizing that at fixed gear (F3) clutch 264,267 and 268 engages at that time.

[00114] in variable gear ratio pattern (V2), clutch 264 and 268 engages, and can provide electric variable gear ratio in compound split pattern.The 4th is fixing than realizing that at fixed gear (F4) clutch 264,265 and 268 engages at that time.

[00115] when clutch 264 and 265 engaged, output separating ranges (V3) had electric variable gear ratio, and wherein, than being transferred to input, 248 pairs second planetary gear set 232 of second motor/generator provide the speed ratio adjustment to first motor/generator 246 with fixing.This output separating ranges realizes by cut-off clutch 268, allows engine speed decline and does not have the energy loop, makes high hypervelocity drive more effective.Move by the synchronous clutch to clutch that is used for power decline, can export separating ranges from this and forward the series hybrid pattern to.

[00116] invention of introducing above provides the continuous variable speed ratio of input speed to output speed, makes the public transportation vehicle that it can be used for car transmissions effectively and can run into various operation requirements.Engine speed can irrespectively keep constant with car speed or change, so that saving of fuel, and reduce pollutant and emission of carbon-dioxide.Move to selected operator scheme and can be synchronous and do not waste energy, make that gear shift can be instantaneous, inconspicuous, and not to the wearing and tearing of transmitting assemblies.

The 4th embodiment's explanation

[00117] In yet another embodiment, the transmission system 210 of Fig. 4 can be modified, cancellation clutch 265 (C3) and positioning clutch 267 (C4) again make selectively rotor 256 to be connected with carrier 226, input separation, compound separation still are provided simultaneously and export the lock out operation pattern.In this configuration, series hybrid operation (S1) realizes by the joint of clutch 262 (C1) and 267 (C4).Gear ratio pattern operation (V1) realizes by the joint of clutch 262 (C1) and 268 (C5).First is fixing than fixed gear (F1) realization after engaging at clutch 262,267 and 268.Second is fixing than realizing in the fixed gear (F2) after clutch 262,264 and 268 engages.The 3rd is fixing than realizing in the fixed gear (F3) after clutch 264,267 and 268 engages.In variable gear ratio pattern (V2), clutch 264 and 268 engages, so that electric gear ratio is provided in compound split pattern.When clutch 264 and 267 engaged, output separating ranges (V3) was provided with electric gear ratio.

The 5th embodiment's explanation

[00118] with reference to Fig. 6, another preferred embodiment of improved electric variable ratio drive system is by label 310 expressions.This embodiment is same as shown in Figure 1, but the planetary gear set of Fig. 1 is replaced by the simple planetary group among Fig. 6 320.Transmission system 310 is designed to receive at least a portion of the driving energy of motor 12.As shown in the figure, motor 12 has output shaft 14, and output shaft is as the input link forward of instantaneous torque damper 16, and damper comprises input clutch 17.The instantaneous torque damper is well known in the art, and irrelevant with the specific instantaneous torque damper 16 that is adopted, its output link all as the input link 318 of transmission system 310, will more completely be described below.

[00119] transmission system 310 preferably adopts two differential gear set with planetary gear set character.First planetary gear set 320 adopts the external gear member 322 that is typically designed to ring gear.The ring gear 322 external internal gear members 324 that are typically designed to sun gear.Carrier 326 rotatably supports a plurality of planetary pinions 328, makes each planetary pinion 328 engage the outer ring gear part 322 of first planetary gear set 320 and interior sun gear member 324 with engagement system.Input link 318 is fixed to the carrier 326 of first planetary gear set 320.

[00120] second planetary gear set 332 also has the external gear member 334 that is typically designed to ring gear, its external internal gear member 336 that is typically designed to sun gear.A plurality of planetary pinions 338 are installed on the carrier 340 in rotatable mode, make each planetary gear members 338 engage the outer ring gear part 334 and the interior sun gear member 336 of second planetary gear set 332 simultaneously with engagement system.

[00121] planetary gear set 320 and 332 is simple.The interior sun gear 336 of second planetary gear set 332 is attached to the ring gear 322 of first planetary gear set 320 by central shaft 342.

[00122] first preferred embodiment 310 also combines first and second motor/generators 346 and 348 respectively.The stator 350 of first motor/generator 346 is fixed to the internal surface 352 of the ring-type of transmission system housing 354.The rotor 356 of first motor/generator 346 is fixed to sleeve 358.The interior sun gear 324 of first planetary gear set 320 is fixed to the front end of sleeve 358, and the opposite end of sleeve 358 is terminated at radially the flanged plate 360 that extends, and the surface of contact that it constitutes with clutch component will be described below.

The stator 366 of [00123] second motor/generator 348 also is fixed to the internal surface 354 of the ring-type of transmission system housing 352.The rotor 368 of second motor/generator 348 is fixed to central shaft 342.

The ring gear 334 of [00124] second planetary gear set 32 is restricted to housing 354 selectively by the first clutch parts with torque-transmitting mechanisms 362 (C1) character.The ring gear 334 of second planetary gear set 332 also is connected to radially extension flange plate 360 selectively by the second clutch parts with torque-transmitting mechanisms 364 (C2) character.First and second torque-transmitting mechanisms 362 and 364 are used to help to select the operator scheme of hybrid powertrain system 310.

[00125] the 3rd torque-transmitting mechanisms 365 (C3) is connected to transmission system housing 354 with ring gear 322, sun gear 336 and rotor 368 selectively.Therefore, this torque-transmitting mechanisms allows second motor/generator 348 to lock onto the transmission system housing, at torque-transmitting mechanisms 364 (C2) when also being engaged, provide additional fixedly than.

[00126] the 4th torque-transmitting mechanisms 367 (C4) is as " locking " clutch, so that ring gear member 322 is locked onto carrier 326.The output driving component 370 of transmission system 10 is fixed to the carrier 340 of second planetary gear set 332.

[00127] transmission system 310 receives power selectively from motor 12 and from power supply 382.Power supply 382 can be one or more batteries.Have provide or store and distribute other power supply of electric energy, as fuel cell, can be used to replace battery, this does not change notion of the present invention.

[00128] power supply 382 is communicated with electric control unit (ECU) 384 by electric conductor 386A and 386B.ECU 384 is communicated with first motor/generator 346 by electric conductor 386C and 386D, and ECU 384 is communicated with second motor/generator 348 by electric conductor 386E and 386F in the same manner.

Conclusion

[00129] various embodiments of the present invention provide electric variable ratio drive system, and it comprises: the input link that receives power from motor; Output link; First and second planetary gear set that respectively have first, second and the 3rd gear part; Be connected to first and second motor/generators of the member of planetary gear set; And at least four selectable torque-transmitting mechanisms that also are connected to the member of planetary gear set.Torque-transmitting mechanisms is optionally connected to close ground at least in conjunction with two, when increasing with the output speed of convenient transmission system, can provide input split pattern, compound split pattern and output split pattern in proper order.

[00130] though only disclose three preferred embodiments of the present invention, should be appreciated that those skilled in the art is clear, notion of the present invention can be carried out many variations.Therefore, scope of the present invention is not limited to illustrated and described details, but comprises all changes and the modification of the scope that falls into claims.

[00131] in the claims, term " connects " expression continuously and directly connects, or the connection of proportional gear, for example is transferred to bias axis.

[00132] now clearly, three, four or five clutches that the present invention only utilizes two planetary gear set and has torque-transmitting mechanisms character have been realized all the other aspects of the present invention.

Claims (12)

1. an electric variable ratio drive system comprises

Input link receives power from motor;

Output link;

First and second motor/generators;

First and second differential gear set respectively have first, second and the 3rd member;

Described input link is connected to described first member of described first gear train continuously, and described output link is connected to described first member of described second gear train continuously;

Described first motor/generator is connected to described second member of described first gear train continuously;

Described second motor/generator is connected continuously with described the 3rd member of described first or second gear train;

First torque-transmitting mechanisms limits described second member of described second gear train selectively;

Second torque-transmitting mechanisms is connected to described first motor/generator with described second member of described second gear train selectively; And

The 3rd torque-transmitting mechanisms limits the described second or the 3rd member of described first gear train selectively, perhaps limits described the 3rd member of described second gear train;

Wherein, described the 3rd member of described first planetary gear set has selection or is connected with described the 3rd member of described second planetary gear set continuously.

2. electric variable ratio drive system as claimed in claim 1, it is characterized in that, described first and second differential gear set are planetary gear set, described first, second of described first gear train comprises ring gear, sun gear and carrier respectively with the 3rd member, and described first, second of described second gear train comprises carrier, ring gear and sun gear respectively with the 3rd member, described first planetary gear set is the dual planetary gear group, and described second planetary gear set is the simple planetary group.

3. electric variable ratio drive system as claimed in claim 1, it is characterized in that, described first and second differential gear set are planetary gear set, described first, second of described first planetary gear set comprises carrier, sun gear and ring gear respectively with the 3rd member, and described first, second and the 3rd member of described second planetary gear set comprise carrier, ring gear and sun gear respectively, and described first and second planetary gear set are the simple planetary group.

4. an electric variable ratio drive system comprises

Input link receives power from motor;

Output link;

First and second motor/generators;

First and second differential gear set respectively have first, second and the 3rd member;

Described input link is connected to described first member of described first gear train continuously, and described output link is connected to described first member of described second gear train continuously;

Described first motor/generator is connected to described second member of described first gear train continuously;

Described second motor/generator is connected continuously with described the 3rd member of described second gear train;

First torque-transmitting mechanisms limits described second member of described second gear train selectively;

Second torque-transmitting mechanisms is connected to described first motor/generator with described second member of described second gear train selectively; And

The 3rd torque-transmitting mechanisms, described the 3rd member with described first gear train is connected with described the 3rd member of described second gear train selectively, and described the 3rd member of wherein said first gear train limits by the connection of the 4th torque-transmitting mechanisms selectively.

5. electric variable ratio drive system as claimed in claim 4, it is characterized in that, described first and second differential gear set are planetary gear set, described first, second of described first gear train comprises ring gear, sun gear and carrier respectively with the 3rd member, and described first, second of described second gear train comprises carrier, ring gear and sun gear respectively with the 3rd member.

6. electric variable ratio drive system as claimed in claim 4 is characterized in that, described first and second differential gear set are respectively compound and the simple planetary group.

7. an electric variable ratio drive system comprises

Input link receives power from motor;

Output link;

First and second motor/generators;

First and second differential gear set respectively have first, second and the 3rd member;

Described input link is connected to described first member of described first gear train continuously, and described output link is connected to described first member of described second gear train continuously;

Described first motor/generator is connected to described second member of described first gear train continuously;

Described second motor/generator is connected continuously with described the 3rd member of described second gear train;

First torque-transmitting mechanisms limits described second member of described second gear train selectively;

Second torque-transmitting mechanisms is connected to described first motor/generator with described second member of described second gear train selectively; And

The 3rd torque-transmitting mechanisms links together two of described member selectively at least, makes all members of described first gear train with identical speed co-rotation.

8. electric variable ratio drive system as claimed in claim 7, it is characterized in that, described first and second differential gear set are the simple planetary group, described first, second of described first gear train comprises carrier, sun gear and ring gear respectively with the 3rd member, and described first, second of described second gear train comprises carrier, ring gear and sun gear respectively with the 3rd member.

9. an electric variable ratio drive system comprises

Input link receives power from motor;

Output link;

First and second motor/generators;

The first and second differential gearing planetary gear set respectively have first, second and the 3rd gear part;

Described input link is connected to described first member of described first planetary gear set continuously, and described output link is connected to described first member of described second planetary gear set continuously;

Described first motor/generator is connected to described second member of described first planetary gear set continuously, and described second member that is connected to described second planetary gear set selectively;

Described second motor/generator is connected continuously with described the 3rd member of described second planetary gear set;

First torque-transmitting mechanisms limits described second member of described second planetary gear set selectively;

Second torque-transmitting mechanisms is connected to described second member of described second planetary gear set described second member of described first planetary gear set selectively;

The 3rd torque-transmitting mechanisms limits described the 3rd member of described first planetary gear set selectively;

The 4th torque-transmitting mechanisms links together two of described member selectively at least, makes all members of described first planetary gear set with identical speed co-rotation; And

The 5th torque-transmitting mechanisms is connected described the 3rd member of described first planetary gear set selectively with described the 3rd member of described second planetary gear set.

10. electric variable ratio drive system as claimed in claim 9, it is characterized in that, described first, second of described first planetary gear set comprises ring gear, sun gear and carrier respectively with the 3rd member, and described first, second of described second planetary gear set comprises carrier, ring gear and sun gear respectively with the 3rd member.

11. electric variable ratio drive system as claimed in claim 9 is characterized in that, described first and second planetary gear set comprise compound respectively and the simple planetary group.

12. an electric variable ratio drive system comprises

Input link receives power from motor;

Output link;

First and second planetary gear set respectively have first, second and the 3rd gear part;

Be connected to first and second motor/generators of the member of described planetary gear set;

At least four selectable torque-transmitting mechanisms are connected to the member of described planetary gear set;

Wherein, at least two of the optionally connected combinations of described torque-transmitting mechanisms when increasing with the output speed of convenient transmission system, can provide input split pattern, compound split pattern and output split pattern with closing in proper order.

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