JP2009143485A - Hybrid vehicle - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To efficiently regenerate kinetic energy of a vehicle by enabling input and output of large rotating power without enlarging a generator motor and a vehicular battery. <P>SOLUTION: This vehicle is provided with a flywheel 18 storing rotating power, and a planetary gear mechanism 19 composing rotating power of the flywheel 18 and rotating power of a generator motor 12 and composing the composed rotating power and rotating power of an engine 11. The rotating power of the flywheel 18 can be added to assist of the engine 11 thereby. Since regeneration operation of the generator motor 12 is carried out and rotating power of the flywheel 18 can be stored during braking of a vehicle 10, regeneration operation of the generator motor 12 can be efficiently carried out and energy loss can be inhibited by storing surplus kinetic energy to the flywheel 18. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a hybrid vehicle having an engine and a generator motor that assists the engine and regenerates kinetic energy.

Conventionally, a hybrid vehicle including an engine as a drive source and a generator motor that regenerates engine assist and kinetic energy (inertial force) of the vehicle is known. This hybrid vehicle uses a generator motor as an electric motor (motor) when the vehicle is accelerated, thereby assisting the rotational force of the engine to improve fuel efficiency. Also, when the vehicle is braked, the generator motor is used as a generator (generator). It is used to convert (regenerate) the kinetic energy of the vehicle into electrical energy, thereby enabling charging of the in-vehicle battery (for example, see Patent Document 1).
JP 2001-169404 A

  However, according to the hybrid vehicle described in Patent Document 1 described above, the generator motor is arranged directly on the output side (propeller shaft side) of the transmission to which the rotational force of the engine is transmitted without using a reduction mechanism or the like. I am doing so. Therefore, when applied to a vehicle equipped with a large displacement engine with a large maximum output, a large generator motor capable of outputting a large driving force suitable for a high output engine, and a large in-vehicle vehicle corresponding to this A battery is required.

  By increasing the size of the generator motor and the on-vehicle battery in this way, it is possible to achieve both sufficient engine assist during vehicle acceleration and efficient kinetic energy regeneration during vehicle braking. The use of a large generator motor and in-vehicle battery may cause a problem in that the layout of the system on the vehicle decreases in addition to an increase in vehicle weight.

  An object of the present invention is to provide a hybrid vehicle that can input and output a large rotational force without increasing the size of a generator motor and a vehicle-mounted battery and can efficiently regenerate the kinetic energy of the vehicle.

  The hybrid vehicle of the present invention is a hybrid vehicle having an engine and a generator motor that assists the engine and regenerates kinetic energy, and rotates by the engine and the generator motor to store rotational force as kinetic energy. A flywheel, a first torque synthesizing mechanism that is provided between the flywheel and the generator motor and synthesizes the torque of the flywheel and the torque of the generator motor, and the first torque synthesis mechanism And a second rotational force synthesis mechanism that synthesizes the rotational force of the first rotational force synthesis mechanism and the rotational force of the engine, and a rotation output from the second rotational force synthesis mechanism. And a rotational force transmission mechanism that transmits force to the wheels of the vehicle.

  In the hybrid vehicle of the present invention, the first and second rotational force combining mechanisms are formed by a single planetary gear mechanism, the sun gear of the planetary gear mechanism is connected to either the flywheel or the generator motor, An outer ring gear of the planetary gear mechanism is connected to either the flywheel or the generator motor, and a planet carrier of the planetary gear mechanism is connected to the engine and the rotational force transmission mechanism.

  In the hybrid vehicle of the present invention, when the vehicle is braked, the generator motor performs a regenerative operation and the flywheel stores rotational force, and after the vehicle stops, the generator motor rotates in the flywheel. It is characterized by regenerative operation by force.

  According to the hybrid vehicle of the present invention, the flywheel that stores the rotational force as kinetic energy, the first rotational force combining mechanism that combines the rotational force of the flywheel and the rotational force of the generator motor, and the first rotational force combining mechanism Since the second rotational force combining mechanism for combining the rotational force of the engine and the rotational force of the engine is provided, the rotational force of the flywheel can be applied to the engine assist. Therefore, it is possible to output a large rotational force without increasing the size of the generator motor and the vehicle-mounted battery, and it is possible to suppress an increase in vehicle weight and a decrease in layout performance to the vehicle. Further, during braking of the vehicle, the rotational force of the engine is distributed to the rotational force of the generator motor and the rotational force of the flywheel. This allows the generator motor to regenerate and store electrical energy, while the flywheel can store rotational force as kinetic energy, allowing the generator motor to perform regenerative operation efficiently and reducing kinetic energy. The surplus can be stored in the flywheel to reduce energy loss. Further, since the kinetic energy of the vehicle can be stored without being converted into electric energy and the rotational force that rotates due to the moment of inertia can be taken out again, the energy efficiency of the vehicle can be improved.

  According to the hybrid vehicle of the present invention, the first and second rotational force combining mechanisms are formed by one planetary gear mechanism, the sun gear of the planetary gear mechanism is connected to either the flywheel or the generator motor, and the planetary gear Since the outer ring gear of the mechanism is connected to either the flywheel or the generator motor, and the planet carrier of the planetary gear mechanism is connected to the engine and the rotational force transmission mechanism, the first and second rotational force combining mechanisms should be made compact. Can do. Therefore, it is possible to suppress an increase in vehicle weight and a decrease in layout performance on the vehicle. Further, since the transmission path of the rotational force can be formed by meshing the gears, energy loss can be suppressed.

  According to the hybrid vehicle of the present invention, when the vehicle is braked, the generator motor performs a regenerative operation and the flywheel stores rotational force as kinetic energy, and after the vehicle stops, the generator motor stores the kinetic energy stored in the flywheel. Therefore, the kinetic energy can be regenerated continuously after the vehicle is stopped. Therefore, the kinetic energy regeneration efficiency during braking of the vehicle can be improved.

  Hereinafter, a first embodiment of the present invention will be described with reference to FIGS.

  FIG. 1 is an explanatory view for explaining a hybrid vehicle according to the first embodiment, and FIG. 2 is an explanatory view for explaining a moving path of mechanical driving force and electric power.

  As shown in FIG. 1, a vehicle 10 is provided with an engine (internal combustion engine) 11 as a drive source and a generator motor 12 having both functions as an electric motor and a generator in parallel. It has become a vehicle. The vehicle 10 employs a rear wheel drive system that drives a rear wheel RT as a pair of wheels on the left and right sides.

  An engine 11 is mounted on the front side (left side in the figure) of the vehicle 10. A crankshaft (not shown) serving as an output shaft of the engine 11 is provided inside the engine 11, and a transmission 13 such as an automatic transmission is connected to the crankshaft. The transmission 13 decelerates the rotational speed of the engine 11 to a predetermined rotational speed, and transmits the rotational force that has been reduced to a high torque to the propeller shaft 14 provided on the output side (right side in the figure) of the transmission 13. It is like that.

  A gear mechanism 15 made of a differential gear or the like is provided on the side opposite to the transmission 13 side of the propeller shaft 14, and a drive shaft 16 for driving each rear wheel RT is connected to the gear mechanism 15. Yes. The gear mechanism 15 converts the rotational direction of the propeller shaft 14 into a substantially vertical direction, and transmits the rotational force of the propeller shaft 14 to the drive shaft 16. Here, the propeller shaft 14, the gear mechanism 15, and the drive shaft 16 constitute a rotational force transmission mechanism in the present invention.

  A one-way clutch 17, a flywheel 18, a planetary gear mechanism 19 and a generator motor 12 are provided in this order on the same axis as the propeller shaft 14 and between the transmission 13 and the gear mechanism 15 from the transmission 13 side. ing. An in-vehicle battery 21 is electrically connected to the generator motor 12 via a wiring 20, and the generator motor 12 is connected to an electric motor via a controller or an inverter (none of which is shown) provided in the middle of the wiring 20. It is rotated as a (motor) and regeneratively operated as a generator.

  The planetary gear mechanism 19 has a sun gear S as a sun gear, and a plurality of (for example, three) planetary gears (planetary gears) P are provided around the sun gear S. Each planetary gear P meshes with gear teeth (not shown) formed on the outer periphery of the sun gear S and rolls around the sun gear S. Each planetary gear P is rotatably supported by a carrier (planetary carrier) C. Therefore, the carrier C rotates relative to the sun gear S as the planetary gear P rolls. Around each planetary gear P, a ring gear R as an outer ring gear having gear teeth (not shown) on the inside meshes. As a result, the ring gear R rotates relative to the sun gear S as each planetary gear P rolls.

  Here, the planetary gear mechanism 19 is composed of a sun gear S, a planetary gear P, a carrier C and a ring gear R, and inputs and outputs rotational force from the outside through three rotating elements consisting of the sun gear S, the carrier C and the ring gear R. Thus, the input rotational forces are combined and the combined rotational forces are separated and output.

  An output shaft 12a of the generator motor 12 is connected to the rotation center of the ring gear R constituting the planetary gear mechanism 19. The ring gear R outputs the rotational force input from the generator motor 12 to the sun gear S and the carrier C through each planetary gear P, while the rotational force input from the sun gear S and the carrier C passes through each planetary gear P. Output to the generator motor 12.

  A propeller shaft 14 is connected to the center of rotation of the carrier C constituting the planetary gear mechanism 19. Carrier C outputs the rotational force input from propeller shaft 14 to sun gear S and ring gear R via each planetary gear P, while the rotational force input from sun gear S and ring gear R passes through each planetary gear P. And output to the propeller shaft 14.

  A rotation shaft Sa is integrally provided at the center of rotation of the sun gear S constituting the planetary gear mechanism 19, and the rotation shaft Sa has a disc-shaped flywheel 18 as an inertial mass and one direction of the flywheel 18 (normal A one-way clutch 17 that allows rotation in the direction (direction) and restricts rotation in the other direction (reverse direction) is provided. The sun gear S outputs the rotational force input from the flywheel 18 to the carrier C and the ring gear R through each planetary gear P, while the rotational force input from the carrier C and the ring gear R passes through each planetary gear P. Output to the flywheel 18.

  The flywheel 18 rotates with the rotational force transmitted from the planetary gear mechanism 19 as the engine 11 and the generator motor 12 rotate. The flywheel 18 is set to have a predetermined diameter (for example, 40 cm) and a predetermined mass (for example, 5 kg), and thus can store rotational force (inertial force). The diameter and mass of the flywheel 18 are appropriately set according to the weight of the vehicle 10, the maximum output of the engine 11, etc., that is, the kinetic energy, the maximum output of the generator motor 12, the capacity of the in-vehicle battery 21, and the like. Is done.

  Here, between the flywheel 18 and the generator motor 12, a sun gear S, each planetary gear P, and a ring gear R for synthesizing the rotational force of the flywheel 18 and the rotational force of the generator motor 12 are provided. , Each planetary gear P and the ring gear R constitute a first rotational force combining mechanism in the present invention. Further, between each planetary gear P (first rotational force synthesizing mechanism) and the engine 11, a carrier C for synthesizing the rotational force (rolling power) of each planetary gear P and the rotational force of the engine 11 is provided. C constitutes the second rotational force synthesis mechanism in the present invention.

  In the vehicle 10 configured as described above, the movement path of the mechanical driving force and electric power is schematically shown in FIG. The black arrow in the figure represents the movement of the mechanical driving force, and the shaded arrow in the figure represents the movement of the electric power.

  When the vehicle 10 is accelerated, the rotational force of the generator motor 12 and the rotational force of the flywheel 18 are input to the planetary gear mechanism 19 via the ring gear R and the sun gear S, respectively, as shown in FIG. Each rotational force is combined with the rotational force of the engine 11 by the planetary gear mechanism 19 and output to each rear wheel RT. Thus, when the vehicle 10 is accelerated, the generator motor 12 and the flywheel 18 assist the rotational force of the engine 11. In this case, when the generator motor 12 is rotating forward, it is rotated as an electric motor, so that the electric energy of the in-vehicle battery 21 is consumed and the kinetic energy stored in the flywheel 18 is also consumed.

  When the vehicle 10 is decelerated, the rotational force of each rear wheel RT is input to the planetary gear mechanism 19 via the carrier C as shown in FIG. Then, the rotational force of each rear wheel RT is separated into the rotational force to the generator motor 12 and the rotational force to the flywheel 18 by the planetary gear mechanism 19. Thus, when the vehicle 10 is decelerated, the generator motor 12 and the flywheel 18 recover the kinetic energy of the vehicle 10. In this case, when the generator motor 12 is rotating forward, it is regeneratively operated as a generator, so that the in-vehicle battery 21 is charged, and the rotational force is stored in the flywheel 18 to increase the rotational speed.

  Here, in the movement of electric power by the generator motor 12, some energy loss (efficiency 70 to 90%) occurs because electric energy is converted into kinetic energy and kinetic energy is converted into electric energy. On the other hand, in the movement of the mechanical driving force by the flywheel 18, almost no energy loss (efficiency is 90 to 95%) occurs.

  Next, the operation of the vehicle 10 configured as described above will be sequentially described with reference to FIGS. 3 to 9 separately for [Before Traveling], [At Acceleration], [At Deceleration], and [After Stop].

  Fig. 3 is a graph showing changes in the number of revolutions of each rear wheel, generator motor, and flywheel based on the 10/15 mode fuel consumption measurement standard (JIS), and Fig. 4 is a graph showing in detail the first half of driving pattern I in Fig. 3. 5 is a graph showing in detail the latter half of the driving pattern IV in FIG. 3, FIG. 6 is an input / output characteristic diagram showing the operation of the planetary gear mechanism before traveling, and FIG. 7 is the operation of the planetary gear mechanism during acceleration. FIG. 8 is an input / output characteristic diagram showing the operation of the planetary gear mechanism during deceleration, and FIG. 9 is an input / output characteristic diagram showing the operation of the planetary gear mechanism after stopping. ing. In the input / output characteristic diagram, the vertical axis and the horizontal axis indicate the rotational speed N and the gear ratio λ, respectively.

[Before driving] (Time t0 to t2)
When an ignition switch (not shown) of the vehicle 10 is turned on, the engine 11 is started with the transmission 13 in the shift position P (parking) (time t0). At this time, the engine 11 is in an idling state, and the generator motor 12 and the flywheel 18 are both stopped (time t0 to t1).

  In order to shift to the driving pattern I shown in FIG. 3, the foot brake (not shown) is turned on and the transmission 13 is set to the shift position D (drive). Then, the generator motor 12 rotates in the reverse direction as an electric motor, triggered by foot brake (ON), accelerator (OFF), shift (D), and vehicle speed (0 km / h). At this time, as shown in FIG. 6, a negative torque Tm1 is generated in the generator motor 12, and accordingly, the flywheel 18 starts to rotate in the positive direction (time t1). Thereafter, the rotational speed of the flywheel 18 increases from N = 0 to N = N1, and the rotational force is stored as kinetic energy in the flywheel 18 (time t1 to t2).

  Here, in the flywheel 18, rotational force is stored only by the rotational operation of the generator motor 12. However, since power generation of an alternator (not shown) is started when the engine 11 is started, The load is small.

[Acceleration] (Time t2 to t3)
Turn off the foot brake and turn on the accelerator. Then, the generator motor 12 starts to rotate in the forward direction as an electric motor, triggered by the foot brake (OFF), the accelerator (ON), the shift (D), and the vehicle speed (0 km / h) (time t2). At this time, a positive rotational force Tm2 is generated in the generator motor 12 as shown in FIG. On the other hand, as the generator motor 12 rotates, the rotational speed of the flywheel 18 decreases from N = N1 to N = N2, and the rotational force (kinetic energy) stored in the flywheel 18 is released. Then, a positive rotational force Tm2 from the generator motor 12, a positive rotational reaction force Tfw1 = (1 / λ) Tm2 from the flywheel 18 and a rotational force Teg1 of the engine 11 are applied to each rear wheel RT, and each rotational force is The combined force To = (1 + 1 / λ) Tm2 + Teg1 is generated. As a result, the vehicle 10 accelerates with a positive combined force To (time t2 to t3).

  Here, the gear ratio λ is obtained by Zr / Zs, where Zr represents the number of gear teeth of the ring gear R and Zs represents the number of gear teeth of the sun gear S.

[Deceleration] (Time t4 to t5)
Turn off the accelerator and turn on the foot brake. Then, triggered by the foot brake (ON), the accelerator (OFF), the shift (D), and the vehicle speed (0 km / h or more) as a trigger, the generator motor 12 starts regenerative operation as a generator and charges the in-vehicle battery 21. Is started (time t4). At this time, a negative torque Tm3 is generated in the generator motor 12 as shown in FIG. On the other hand, as the generator motor 12 rotates, the rotational speed of the flywheel 18 increases from N = 0 to N = N3, and the rotational force is stored in the flywheel 18 as kinetic energy. Then, the negative rotational force Tm3 due to the generator motor 12, the negative rotational force Tfw2 = (1 / λ) Tm3 due to the inertia of the flywheel 18 and the rotational force Teg2 of the engine 11 are applied to each rear wheel RT. The resultant force To = (1 + 1 / λ) Tm3-Teg2 is generated. As a result, the vehicle 10 decelerates with the negative combined force To (time t4 to t5).

  Here, as shown in FIG. 8, the reverse rotation of the flywheel 18 is regulated by the one-way clutch 17 in order to suppress the consumption of kinetic energy (waste energy) necessary for the reverse rotation of the flywheel 18. It is. That is, the rotational force obtained by the reverse rotation of the flywheel 18 becomes waste energy that acts in the reverse direction when the vehicle 10 moves forward, that is, when each rear wheel RT is rotated forward. Although not shown in FIG. 8, in the vehicle 10 according to the present embodiment, in addition to the regenerative brake as described above, a mechanical brake by hydraulic drive or the like is used in combination.

[After stop] (Time t6 to t9)
In order to decelerate and stop the vehicle 10, the vehicle 10 is stopped by continuing the on operation of the foot brake (time t6). Then, when the rotational speed of the flywheel 18 is insufficient, triggered by the foot brake (ON), the accelerator (OFF), the shift (D), and the vehicle speed (0 km / h), the generator motor 12 And the rotational force is continuously stored in the flywheel 18 (time t6 to t7).

  After that, when the transmission 13 is set to the shift position N (neutral), the generator motor 12 stops (idle) triggered by the foot brake (ON), accelerator (OFF), shift (N), and vehicle speed (0 km / h). Thus, the storage of the rotational force on the flywheel 18 is completed. Then, the rotational speeds of the generator motor 12 and the flywheel 18 gradually decrease due to the respective rotational resistances (time t7 to t8).

  Set transmission 13 to shift position P (time t8). Then, using the shift (P), the vehicle speed (0 km / h), and the rotational speed of the flywheel 18 (N> 0) as a trigger, the generator motor 12 performs a regenerative operation as a generator. At this time, as indicated by a broken line in FIG. 9, the rotational force stored in the flywheel 18 is released toward the generator motor 12, and a positive rotational force Tm4 is generated in the generator motor 12. Thereafter, the rotational speed of the flywheel 18 decreases from N = N4 to N = 0. Thereby, the kinetic energy of the flywheel 18 is regenerated as electric energy, and the in-vehicle battery 21 is recharged. After the vehicle-mounted battery 21 is recharged, the rotational speeds of the flywheel 18 and the generator motor 12 are N = 0 (time t8 to t9).

  According to the vehicle 10 according to the first embodiment configured as described above, the flywheel 18 that stores the rotational force, the rotational force of the flywheel 18 and the rotational force of the generator motor 12 are combined, and this Since the planetary gear mechanism 19 that combines the combined rotational force and the rotational force of the engine 11 is provided, the rotational force of the flywheel 18 can be applied to the assist of the engine 11. Therefore, a large rotational force can be output to each rear wheel RT without increasing the size of the generator motor 12 and the in-vehicle battery 21, and an increase in vehicle weight and a decrease in layout performance on the vehicle 10 can be suppressed. Further, when the vehicle 10 is braked, the generator motor 12 is regeneratively operated while the flywheel 18 can store rotational force, so that the generator motor 12 can be regenerated efficiently and kinetic energy can be stored. The excess can be stored in the flywheel 18 to suppress energy loss.

  Furthermore, according to the vehicle 10 according to the first embodiment, the rotational force is moved among the engine 11, the generator motor 12 and the flywheel 18 as one planet made up of the sun gear S, the planetary gear P, the carrier C and the ring gear R. Since the gear mechanism 19 is used, it is possible to suppress an increase in vehicle weight and a decrease in layout performance on the vehicle 10. Further, since the transmission path of the rotational force can be formed by meshing the gears, energy loss can be suppressed.

  Furthermore, according to the vehicle 10 according to the first embodiment, when the vehicle 10 is braked, the generator motor 12 performs a regenerative operation, the flywheel 18 stores rotational force, and after the vehicle 10 stops, the generator motor 12 Since the regenerative operation is performed by the rotational force stored in the flywheel 18, the kinetic energy can be regenerated continuously after the vehicle 10 is stopped. Therefore, the kinetic energy regeneration efficiency during braking of the vehicle 10 can be improved.

  Next, a second embodiment of the present invention will be described with reference to FIG. FIG. 10 is an explanatory diagram illustrating a hybrid vehicle according to the second embodiment. In addition, the same code | symbol is attached | subjected to the part similar to 1st Embodiment mentioned above, and a different part from 1st Embodiment is demonstrated.

  The vehicle 30 shown in FIG. 10 is different from the first embodiment described above in that the transmission 13 is disposed between the generator motor 12 and the gear mechanism 15, and the rotation shaft Sa of the sun gear S is replaced with the one-way clutch 17. The difference is that the brake mechanism 31 is provided. The brake mechanism 31 includes a disk DS that rotates integrally with the rotation shaft Sa, and a pair of pads (not shown) that are close to or separated from the disk DS by a proportional solenoid (not shown).

  Also in the vehicle 30 according to the second embodiment configured as described above, the same operational effects as those of the first embodiment described above can be achieved. In addition, in the second embodiment, the regeneration efficiency of kinetic energy can be suppressed by operating the brake mechanism 31 at a predetermined timing to stop the rotation of the flywheel 18. Furthermore, the rotational speed of the generator motor 12 can be made proportional to the rotational speed of the engine 11, and the in-vehicle battery 21 can be charged using the generator motor 12 as a generator without changing the rotational speed of the flywheel 18. Therefore, overcharge to the in-vehicle battery 21 can be suppressed, and the life and size of the in-vehicle battery 21 can be increased.

  Next, a third embodiment of the present invention will be described with reference to FIG. FIG. 11 is an explanatory diagram for explaining a hybrid vehicle according to a third embodiment. In addition, the same code | symbol is attached | subjected to the part similar to 1st Embodiment mentioned above, and a different part from 1st Embodiment is demonstrated.

  The vehicle 40 shown in FIG. 11 is different from the first embodiment described above in that the flywheel 18, the planetary gear mechanism 19 and the generator motor 12 are arranged at different positions away from the propeller shaft 14. The difference is that the connection relations of 19 to the flywheel 18 and the generator motor 12 are reversed.

  A large-diameter gear 14a is integrally provided at the central portion of the propeller shaft 14 in the axial direction, and a small-diameter gear Ca is integrally provided at the rotation center of the carrier C. The gears 14a and Ca are meshed so as to transmit a rotational force to each other. The output shaft 12a of the generator motor 12 is connected to the rotation center of the sun gear S, and the rotation shaft Ra of the ring gear R is connected to the rotation center of the flywheel 18. Here, the input / output diagrams of the planetary gear mechanism 19 in the vehicle 40 are equal to the input / output diagrams shown in FIGS.

  Also in the vehicle 40 according to the third embodiment configured as described above, it is possible to achieve the same operational effects as those of the first embodiment described above. In addition to this, in the third embodiment, for example, the layout of the vehicle 40 is changed by changing the size of the gears 14a and Ca or by interposing a plurality of other gears between the gears 14a and Ca. Accordingly, the generator motor 12 and the like can be freely arranged, and the layout to the vehicle 40 can be improved.

  Next, a fourth embodiment of the present invention will be described with reference to FIG. FIG. 12 is an explanatory diagram illustrating a hybrid vehicle according to the fourth embodiment. In addition, the same code | symbol is attached | subjected to the part similar to 1st Embodiment mentioned above, and a different part from 1st Embodiment is demonstrated.

  The vehicle 50 shown in FIG. 12 is different from the first embodiment described above in that the transmission 13 is disposed between the generator motor 12 and the gear mechanism 15, the flywheel 18 of the planetary gear mechanism 19, and the generator motor 12. The point of reversing the connection relation to the point, the point of providing a planetary gear mechanism 51 for speed increase between the flywheel 18 and the planetary gear mechanism 19, the point of providing a brake mechanism 52 instead of the one-way clutch 17, the brake mechanism 52 Is different from the engine 11 in that a clutch CL is provided.

  The speed increasing planetary gear mechanism 51 includes a sun gear S1, a plurality of (for example, three) planetary gears P1, a carrier C1, and a ring gear R1. The ring gear R1 is fixed to a fixing member such as a body (not shown) of the vehicle 50, and a flywheel 18 and a brake mechanism 52 are provided on the rotation shaft S1a of the sun gear S1. The brake mechanism 52 is configured in the same manner as in the second embodiment described above. The carrier C1 is connected to the ring gear R of the planetary gear mechanism 19. An output shaft 12 a of the generator motor 12 is connected to the rotation center of the sun gear S that constitutes the planetary gear mechanism 19.

  Also in the vehicle 50 according to the fourth embodiment configured as described above, the same operational effects as those of the above-described first embodiment can be obtained. In addition, in the fourth embodiment, the regeneration efficiency of kinetic energy can be suppressed by operating the brake mechanism 52 at a predetermined timing to stop the rotation of the flywheel 18. Therefore, overcharge to the in-vehicle battery 21 can be suppressed, and the life and size of the in-vehicle battery 21 can be increased. Further, since the speed of the planetary gear mechanism 51 for speeding up can increase the rotational speed of the flywheel 18, it is possible to suppress generation of noise due to uneven rotation of the flywheel 18 and vibration generated in the vehicle 50. Furthermore, the vehicle 50 can be driven only by the generator motor 12 by disengaging the clutch CL.

  Next, a fifth embodiment of the present invention will be described with reference to FIG. FIG. 13 is an explanatory diagram for explaining a hybrid vehicle according to a fifth embodiment. In addition, the same code | symbol is attached | subjected to the part similar to 1st Embodiment mentioned above, and a different part from 1st Embodiment is demonstrated.

  The vehicle 60 shown in FIG. 13 is different from the second embodiment described above in that the engine 11 is disposed sideways with respect to the vehicle body (not shown), and one end side of the output shaft (crankshaft) of the engine 11 is arranged. The difference is that the planetary gear mechanism 19, the flywheel 18 and the generator motor 12 are connected directly to the transmission 13, and the brake mechanism 61 is provided in place of the one-way clutch 17.

  Also in the vehicle 60 according to the fifth embodiment configured as described above, the same operational effects as those of the first embodiment described above can be achieved. In addition to this, the fifth embodiment can be applied particularly to a front-wheel drive vehicle, and since all the rotation shafts are transmitted to the drive shaft 16 in parallel, transmission loss due to gear meshing can be reduced. It becomes possible.

  It goes without saying that the present invention is not limited to the above-described embodiments, and various modifications can be made without departing from the scope of the invention. For example, in each of the embodiments described above, the first rotational force combining mechanism and the second rotational force combining mechanism are configured by one planetary gear mechanism 19, but the present invention is not limited to this, You may comprise a rotational force synthetic | combination mechanism and a 2nd rotational force synthetic | combination mechanism with a respectively separate gear train.

It is explanatory drawing explaining the hybrid vehicle which concerns on 1st Embodiment. It is explanatory drawing explaining the moving path | route of a mechanical driving force and electric power. It is a graph which shows the rotation speed change of each rear wheel, a generator motor, and a flywheel based on a 10-15 mode fuel consumption measurement standard (JIS). It is a graph which shows the first half of the driving | running pattern I in FIG. 3 in detail. It is a graph which shows the latter half of the driving | operation pattern IV in FIG. 3 in detail. It is an input-output characteristic diagram which shows operation | movement of the planetary gear mechanism before driving | running | working. It is an input-output characteristic diagram which shows operation | movement of the planetary gear mechanism at the time of acceleration. It is an input-output characteristic diagram which shows operation | movement of the planetary gear mechanism at the time of deceleration. It is an input-output characteristic diagram which shows operation | movement of the planetary gear mechanism after a stop. It is explanatory drawing explaining the hybrid vehicle which concerns on 2nd Embodiment. It is explanatory drawing explaining the hybrid vehicle which concerns on 3rd Embodiment. It is explanatory drawing explaining the hybrid vehicle which concerns on 4th Embodiment. It is explanatory drawing explaining the hybrid vehicle which concerns on 5th Embodiment.

Explanation of symbols

10 Vehicle (hybrid vehicle)
11 Engine 12 Generator motor 14 Propeller shaft (rotational force transmission mechanism)
15 Gear mechanism (rotational force transmission mechanism)
16 Drive shaft (rotational force transmission mechanism)
18 Flywheel 19 Planetary gear mechanism (first torque synthesis mechanism, second torque synthesis mechanism)
S Sun gear (first rotational force synthesis mechanism, sun gear)
R ring gear (1st torque composition mechanism, outer ring gear)
C carrier (second rotational force synthesis mechanism, planetary carrier)
RT Rear wheel (wheel)
30, 40, 50, 60 Vehicle (hybrid vehicle)

Claims (3)

A hybrid vehicle having an engine and a generator motor for assisting the engine and regenerating kinetic energy,
A flywheel that is rotated by the engine and the generator motor and stores rotational force as kinetic energy;
A first torque synthesizing mechanism that is provided between the flywheel and the generator motor and synthesizes the torque of the flywheel and the torque of the generator motor;
A second rotational force combining mechanism provided between the first rotational force combining mechanism and the engine, for combining the rotational force of the first rotational force combining mechanism and the rotational force of the engine;
A hybrid vehicle, comprising: a rotational force transmission mechanism that transmits rotational force output from the second rotational force combining mechanism to wheels of the vehicle.   2. The hybrid vehicle according to claim 1, wherein the first and second rotational force synthesizing mechanisms are formed by one planetary gear mechanism, and the sun gear of the planetary gear mechanism is connected to either the flywheel or the generator motor. And the outer ring gear of the planetary gear mechanism is connected to either the flywheel or the generator motor, and the planetary carrier of the planetary gear mechanism is connected to the engine and the rotational force transmission mechanism. vehicle.   3. The hybrid vehicle according to claim 1, wherein when the vehicle is braked, the generator motor performs a regenerative operation and the flywheel stores rotational force. After the vehicle is stopped, the generator motor is applied to the flywheel. A hybrid vehicle that performs a regenerative operation using stored rotational force.

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