JP2011230741A - Driving device for hybrid vehicle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a driving device for hybrid vehicle that can perform more efficient regeneration, while being able to give good driveability by assistance of an electric motor.SOLUTION: The target gear speed is selected by searching output torque in each gear speed according to the vehicle speed, while searching the gear speed based on the vehicle speed and gas pedal opening, from a gearshift map which has an upshift line and a downshift line which are set by offsetting from BSFC (Brake Specific Fuel Consumption) bottom torque line which carries out bottom trace of the BSFC of the internal combustion engine for each gearshift speed respectively and comparing the output torque with the target output torque.

Description

  The present invention relates to a hybrid vehicle drive device.

  Conventionally, a hybrid vehicle travels by driving an electric motor and / or an internal combustion engine as a power source, and travels in various ways such as an EV travel mode in which the vehicle travels only by the power of the electric motor, and an engine travel mode in which the vehicle travels only by the power of the internal combustion engine. It is possible to run in mode.

  In the vehicle drive device 200 of Patent Document 1, as shown in FIG. 18, input shafts 203 and 204 that are connected to clutches C <b> 1 and C <b> 2 and to which the output torque of the power source 201 is input, and the output torque is output to an output member 212. Output shafts 205 and 206, and switching mechanisms S1 to S4 for selectively setting a transmission mechanism disposed between the input shafts 203 and 204 and the output shafts 205 and 206 to a power transmission state, A multi-clutch transmission that controls the engagement / release states of C1, C2 and the switching mechanisms S1 to S4 to set a plurality of shift speeds is provided, and power can be transmitted between one output shaft 206 and the electric motor 217. It is connected.

  Such an automatic shift by the multiple clutch transmission, for example, when the upshift from the first speed to the second speed is performed, the power is transmitted from the first input shaft 203 to the first output shaft 205 via the second speed gear pair 209. The second switching mechanism S2 for transmitting the gear is shifted in advance (pre-shifted), the second clutch C2 engaged at the first speed is released, and the first clutch C1 is engaged, so that the second speed Is set.

JP 2009-154610 A

  By the way, in the hybrid vehicle drive device, it is desired to minimize the torque loss at the time of shifting to suppress the shock to a minimum. However, the vehicle drive device 200 of Patent Document 1 specifically describes this. There is no description. In particular, in a hybrid vehicle having a configuration in which the power of an electric motor is transmitted to an output shaft only through a transmission gear mechanism provided on one input shaft of the two input shafts, Each inertia torque differs by the weight of the motor between the input shaft and the other input shaft not provided with the electric motor, and it is desired to suppress a shift shock due to the difference in the inertia torque. In addition, when the pre-shift is performed using the transmission gear mechanism provided on the other input shaft not provided with the electric motor, the rotation speed cannot be adjusted by the electric motor. Therefore, it is desirable to suppress the transmission shock even at this timing. .

  The present invention has been made in view of the above circumstances, and an object of the present invention is to drive a hybrid vehicle capable of minimizing torque loss at the time of shifting or pre-shifting as much as possible and providing good drivability. To provide an apparatus.

In order to achieve the above object, the invention described in claim 1
An internal combustion engine (for example, an engine 6 in an embodiment described later);
An electric motor (for example, a motor 7 in an embodiment described later);
A power storage device that supplies electric power to the electric motor (for example, a battery 3 in an embodiment described later);
A first input shaft connected to the electric motor and selectively connected to the internal combustion engine via first connecting / disconnecting means (for example, a first clutch 41 of the embodiment described later), for example, A first main shaft 11) and a second input shaft (for example, in an embodiment described later) selectively connected to the internal combustion engine via a second connecting / disconnecting means (for example, a second clutch 42 in an embodiment described later). A second intermediate shaft 16), an output shaft (for example, a counter shaft 14 in an embodiment described later) for outputting power to the driven portion, and a plurality of first shift stages between the first input shaft and the output shaft. Possible first transmission gear mechanisms (for example, a planetary gear mechanism 30, a third speed gear pair 23, and a fifth speed gear pair 25 in the embodiment described later), and a plurality of gears between the second input shaft and the output shaft. A second speed change gear mechanism that can constitute the second speed stage (for example, a second speed change mechanism in a second embodiment described later) Gear pair 22 and fourth speed gear pair 24) and a first synchronizer for switching the first transmission gear mechanism so as to select one of the plurality of first gears (for example, in an embodiment described later) A lock mechanism 61, a first shifter 51 for shifting, and a second synchronizer for switching the second shift gear mechanism so as to select one of the plurality of second shift stages (for example, a second synchronizer according to a second embodiment described later) A shift mechanism (for example, a transmission 20 according to an embodiment to be described later), and a hybrid vehicle drive device.
From each shift stage, a shift map having an upshift line and a downshift line set by offsetting from the BSFC bottom torque line for bottom tracing the BSFC of the internal combustion engine is used to change the gear stage based on the vehicle speed and the accelerator opening. A hybrid vehicle drive device characterized by searching for an output torque at each gear stage according to a vehicle speed and comparing the output torque with a target output torque to select a target gear stage.

In addition to the structure of Claim 1, the invention of Claim 2 is
The shift map is characterized in that the upshift line, the downshift line, and the preshift line are offset to the high torque side according to the assistable torque by the electric motor.

In addition to the structure of Claim 1, the invention of Claim 3 is
The shift map is characterized in that the upshift line, the downshift line, and the preshift line are offset to the high torque side or the low torque side according to the output upper limit torque of the internal combustion engine.

In addition to the structure of Claim 1, the invention of Claim 4 has
When the accelerator pedal is fully open or the throttle is fully open, the internal combustion engine is operated at maximum power,
When the accelerator pedal is not fully opened or the throttle is fully opened, the internal combustion engine is operated at an output corresponding to the BSFC bottom torque.

In addition to the structure of Claim 1, the invention of Claim 5 is
When the vehicle is traveling with a predetermined second gear selected by the second synchronizer, the first synchronizer pre-shifts to a first gear lower than the predetermined second gear. It is characterized by.

In addition to the structure of Claim 1, the invention of Claim 6 is
When the second shift stage is selected and the vehicle is traveling with the pre-shift performed at the first shift stage, if the motor can assist, the kick-down line is set to the drive limit of the internal combustion engine. It is set with the assist limit of
The kickdown is performed by depressing the driver's accelerator pedal when the assist amount by the electric motor decreases due to a decrease in the amount of power stored in the power storage device and the required driving force cannot be satisfied. The hybrid vehicle drive device according to claim 1.

In addition to the structure of Claim 1, the invention of Claim 7 is
When the first synchronizer selects the predetermined first shift speed and travels, when the shift is downshifted to the first shift speed lower by two due to a sudden increase in the accelerator opening, the first and second While both of the connecting / disconnecting means are grasped by sliding engagement, continuously from the predetermined first gear to the first gear below the second gear through the second gear below the first gear during the inertia phase. It is characterized by switching to.

Further, the invention according to claim 8 is
An internal combustion engine;
An electric motor,
A power storage device for supplying electric power to the electric motor;
A first input shaft connected to the electric motor and selectively connected to the internal combustion engine via first connecting / disconnecting means, and a first input shaft selectively connected to the internal combustion engine via second connecting / disconnecting means. Two input shafts, an output shaft for outputting power to the driven part, a first transmission gear mechanism capable of forming a plurality of first shift stages between the first input shaft and the output shaft, and the second input shaft A second transmission gear mechanism capable of configuring a plurality of second shift speeds between output shafts, a first synchronizer for switching the first transmission gear mechanism so as to select one of the plurality of first shift speeds; A hybrid vehicle drive device comprising: a transmission mechanism comprising: a second synchronization device that switches the second transmission gear mechanism so as to select any one of the plurality of second gear positions;
When upshifting from the first gear to the second gear while assisting the motor in the fully opened state, the second disconnecting gear is released during the inertia phase after releasing the fastening of the first connecting / disconnecting means. While increasing the fastening capacity of the contact means, a pre-shift is performed to the first shift stage that is two stages above the first shift stage.

Furthermore, the invention according to claim 9 provides
An internal combustion engine;
An electric motor,
A power storage device for supplying electric power to the electric motor;
A first input shaft connected to the electric motor and selectively connected to the internal combustion engine via first connecting / disconnecting means, and a first input shaft selectively connected to the internal combustion engine via second connecting / disconnecting means. Two input shafts, an output shaft for outputting power to the driven part, a first transmission gear mechanism capable of forming a plurality of first shift stages between the first input shaft and the output shaft, and the second input shaft A second transmission gear mechanism capable of configuring a plurality of second shift speeds between output shafts, a first synchronizer for switching the first transmission gear mechanism so as to select one of the plurality of first shift speeds; A hybrid vehicle drive device comprising: a transmission mechanism comprising: a second synchronization device that switches the second transmission gear mechanism so as to select any one of the plurality of second gear positions;
The downshift line of the shift map is set to the BSFC bottom torque line except for the throttle fully open state,
When the predetermined second gear is selected and the vehicle is traveling, when the first gear on the first gear is preshifted and the shift is downshifted to the first gear on the lower gear by increasing the accelerator opening. The internal combustion engine maintains the output along the BSFC bottom torque line, and the shift stage is changed when the torque of the electric motor becomes 0 Nm, and excess torque is supplied to the electric motor from the end of the inertia phase. It is characterized by absorption by regeneration.

In addition to the structure in any one of Claim 1 to 9, the invention of Claim 10 is
When the power storage device is in an extremely low temperature state, when downshifting from the predetermined second shift stage, the first connecting / disconnecting means is slidably engaged so that the rotational speed of the electric motor matches the rotational speed of the internal combustion engine. Then, in a state where the first connecting / disconnecting means is opened, the first synchronizing device in-gears the first gear position one step below, and then the first connecting / disconnecting means is fastened. .

In addition to the structure in any one of Claim 1 to 10, the invention of Claim 11 is
When the vehicle is traveling with the predetermined second speed selected, if the first synchronizer pre-shifts to the first speed, the transmission is transmitted to the internal combustion engine by the connection of the second connecting / disconnecting means. The power to be absorbed can be absorbed by regeneration of the electric motor.

  According to the hybrid vehicle drive device of the first aspect, in the hybrid vehicle having a configuration in which the power of the electric motor is transmitted to the output shaft only through the first transmission gear mechanism provided on the first input shaft. However, since the output torque and the target torque at each gear stage are compared and the target gear stage is selected, fuel consumption can be improved and good drivability can be provided.

  According to the hybrid vehicle drive device of the second aspect, the internal combustion engine can be used at a high speed for a long time, and good fuel efficiency can be provided and shift hunting can be suppressed.

  According to the hybrid vehicle drive device of the third aspect, for example, when the engine output upper limit torque is lowered due to high altitude traveling, by offsetting the upshift line, the downshift line, and the preshift line to the low torque side, An internal combustion engine can be used for a long time at a low speed, and a desired torque can be obtained.

  According to the hybrid vehicle drive device of the fourth aspect, it is possible to change the output of the internal combustion engine in accordance with the driver's request and to provide a suitable shift timing.

  According to the hybrid vehicle drive device of the fifth and eleventh aspects, when the vehicle is traveling with the predetermined second gear stage selected, the first synchronizer makes the first lower than the predetermined second gear stage. Since pre-shifting is performed at the gear position, good drivability can be provided by assisting the electric motor, and more efficient regeneration can be performed.

  According to the hybrid vehicle drive device of the sixth aspect, the kickdown can be performed without giving the driver a sense of incongruity in accordance with the timing requested by the driver.

  According to the hybrid vehicle drive device of the seventh aspect, the kick-down from the first gear to the first gear two steps below can be performed in a short time.

  According to the hybrid vehicle drive device of the eighth aspect, torque loss at the time of gear change can be compensated by the engagement capacity of the clutch, and a shift shock can be suppressed.

  According to the hybrid vehicle drive device of the ninth aspect, when the vehicle is traveling with the predetermined second shift stage selected, the accelerator opening is increased from the state where the first shift stage on the first stage is preshifted. Therefore, when downshifting to the first shift stage one stage lower, it is possible to perform an efficient downshift with less shift shock.

  According to the hybrid vehicle drive device of the tenth aspect, even when the power storage device is in an extremely low temperature state, it is possible to perform an efficient shift with less shift shock.

It is sectional drawing which shows an example of the drive device for hybrid vehicles of this invention. It is a schematic block diagram of the hybrid vehicle drive device of FIG. It is a schematic block diagram of the control apparatus of the hybrid vehicle drive device of FIG. It is explanatory drawing of a control map. It is a figure which shows a transmission map. It is a figure which expands and shows a part of shift map. It is a figure for demonstrating the offset of a shift line. It is a block diagram for demonstrating target gear stage setting. It is a timing chart which shows a state change at the time of downshifting from the 4th speed run in which the preshift is performed to the 3rd gear stage. It is a timing chart which shows the state change at the time of downshifting from the 4th speed run in which the pre-shift is performed to the 5th gear stage. (A) is a figure for demonstrating the case where the downshift timing at the time of motor assistance is made into the depression determination time, (b) becomes unable to assist the downshift timing at the time of motor assistance with respect to a required driving force. It is a figure for demonstrating the case where it is set as the time. It is a timing chart which shows the state change at the time of upshifting from the 4th speed driving | running in which the pre-shift is performed to the 3rd speed to the 5th speed driving | running | working. It is a timing chart which shows a state change at the time of downshifting from the 2nd speed run of a battery low temperature state to the 1st speed run. It is a timing chart which shows a state change at the time of downshifting from the 3rd speed run in which the preshift is performed to the 5th gear stage. It is a timing chart which shows a state change at the time of kicking down from the 5th speed run to the 3rd speed run. It is a driving | running | working performance diagram of the drive device for hybrid vehicles. 6 is a timing chart showing a state change when the assist of the motor 7 is switched from the first speed stage to the third speed stage when upshifting from the first speed running to the second speed running in the WOT assist running. 1 is a schematic diagram of a vehicle drive device of Patent Document 1. FIG.

Hereinafter, an embodiment of a drive device for a hybrid vehicle in which the control device of the present invention can be mounted will be described with reference to the drawings.
A hybrid vehicle drive device 1 (hereinafter referred to as a vehicle drive device) according to the present embodiment, as shown in FIGS. 1 and 2, drives wheels via drive shafts 9 and 9 of a vehicle (not shown). DW, DW (driven part) for driving, an internal combustion engine (hereinafter referred to as “engine”) 6 as a drive source, an electric motor (hereinafter referred to as “motor”) 7, and driving power to drive wheels DW, And a transmission 20 for transmission to the DW.

  The engine 6 is, for example, a gasoline engine or a diesel engine. A first clutch 41 (first connecting / disconnecting means) and a second clutch 42 (second connecting / disconnecting means) of the transmission 20 are connected to the crankshaft 6a of the engine 6. Is provided.

  The motor 7 is a three-phase brushless DC motor, and includes a stator 71 composed of 3n armatures 71 a and a rotor 72 disposed so as to face the stator 71. Each armature 71a includes an iron core 71b and a coil 71c wound around the iron core 71b. The armature 71a is fixed to a casing (not shown) and is arranged at substantially equal intervals in the circumferential direction around the rotation axis. Yes. The 3n coils 71c constitute n sets of U-phase, V-phase, and W-phase three-phase coils.

  The rotor 72 has an iron core 72a and n permanent magnets 72b arranged at almost equal intervals around the rotation axis, and the polarities of two adjacent permanent magnets 72b are different from each other. The fixing portion 72c for fixing the iron core 72a has a hollow cylindrical shape made of a soft magnetic material (for example, iron) and is disposed on the outer peripheral side of the ring gear 35 of the planetary gear mechanism 30 described later. The sun gear 32 is connected. Accordingly, the rotor 72 is configured to rotate integrally with the sun gear 32 of the planetary gear mechanism 30.

  The planetary gear mechanism 30 includes a sun gear 32, a ring gear 35 that is arranged coaxially with the sun gear 32 and that surrounds the sun gear 32, and a planetary gear 34 that meshes with the sun gear 32 and the ring gear 35. And a carrier 36 that supports the planetary gear 34 so as to be capable of rotating and revolving. In this way, the sun gear 32, the ring gear 35, and the carrier 36 are configured to be differentially rotatable with respect to each other.

  The ring gear 35 is provided with a lock mechanism 61 (first synchronization device) having a synchronization mechanism (synchronizer mechanism) and configured to stop (lock) rotation of the ring gear 35. A friction engagement device using a brake and a sleeve may be used as the lock mechanism 61.

  The transmission 20 is a so-called twin clutch transmission including the first clutch 41 and the second clutch 42, the planetary gear mechanism 30, and a plurality of transmission gear groups described later.

  More specifically, the transmission 20 includes a first main shaft 11 (first input shaft) disposed on the same axis (rotation axis A1) as the crank shaft 6a of the engine 6, a second main shaft 12, and a connecting shaft 13. A counter shaft 14 (output shaft) rotatable around a rotation axis B1 arranged in parallel with the rotation axis A1, and a first intermediate rotatable around a rotation axis C1 arranged in parallel with the rotation axis A1. Centered on a shaft 15, a second intermediate shaft 16 (second input shaft) rotatable around a rotation axis D1 arranged in parallel with the rotation axis A1, and a rotation axis E1 arranged in parallel with the rotation axis A1 Is provided with a rotatable reverse shaft 17.

  The first main shaft 11 is provided with a first clutch 41 on the engine 6 side, and a sun gear 32 of the planetary gear mechanism 30 and a rotor 72 of the motor 7 are attached to the side opposite to the engine 6 side. Accordingly, the first main shaft 11 is selectively connected to the crankshaft 6 a of the engine 6 by the first clutch 41 and directly connected to the motor 7 so that the power of the engine 6 and / or the motor 7 is transmitted to the sun gear 32. It is configured.

  The second main shaft 12 is configured to be shorter and hollow than the first main shaft 11, and is disposed so as to be relatively rotatable so as to cover the periphery of the first main shaft 11 on the engine 6 side. The second main shaft 12 is provided with a second clutch 42 on the engine 6 side, and an idle drive gear 27a is integrally attached to the opposite side to the engine 6 side. Accordingly, the second main shaft 12 is selectively connected to the crankshaft 6a of the engine 6 by the second clutch 42, and the power of the engine 6 is transmitted to the idle drive gear 27a.

  The connecting shaft 13 is configured to be shorter and hollow than the first main shaft 11, and is disposed so as to be relatively rotatable so as to cover the periphery of the first main shaft 11 on the side opposite to the engine 6. Further, a third speed drive gear 23 a is integrally attached to the connecting shaft 13 on the engine 6 side, and a carrier 36 of the planetary gear mechanism 30 is integrally attached to the opposite side of the engine 6 side. Therefore, the carrier 36 attached to the connecting shaft 13 and the third-speed drive gear 23a are configured to rotate integrally by the revolution of the planetary gear 34.

  Further, the first main shaft 11 is rotatable relative to the first main shaft 11 between a third speed drive gear 23 a attached to the connecting shaft 13 and an idle drive gear 27 a attached to the second main shaft 12. A fifth driven gear 25a is provided, and a reverse driven gear 28b that rotates integrally with the first main shaft 11 is attached. Further, a first main shaft 11 and a third speed drive gear 23a or a fifth speed drive gear 25a are connected or released between the third speed drive gear 23a and the fifth speed drive gear 25a. A shift shifter 51 is provided. When the first speed-shifting shifter 51 is in-gear at the third speed connection position, the first main shaft 11 and the third speed drive gear 23a are connected to rotate integrally and in-gear at the fifth speed connection position. Sometimes, the first main shaft 11 and the fifth speed drive gear 25a rotate integrally, and when the first speed change shifter 51 is in the neutral position, the first main shaft 11 has the third speed drive gear 23a and the fifth speed drive gear 25a. It rotates relative to the drive gear 25a. When the first main shaft 11 and the third speed drive gear 23a rotate together, the sun gear 32 attached to the first main shaft 11 and the carrier 36 connected to the third speed drive gear 23a by the connecting shaft 13 are provided. While rotating integrally, the ring gear 35 also rotates together, and the planetary gear mechanism 30 is united. When the planetary gear mechanism 30 rotates as a unit, the third speed traveling described later is performed. When the first shifter 51 is in the neutral position and the lock mechanism 61 is connected at the first speed connection position, the ring gear 35 is locked, and the rotation of the sun gear 32 is decelerated and transmitted to the carrier 36. Is done. Thereby, the 1st speed driving | running mentioned later is made.

  A first idle driven gear 27 b that meshes with an idle drive gear 27 a attached to the second main shaft 12 is integrally attached to the first intermediate shaft 15.

  A second idle driven gear 27 c that meshes with a first idle driven gear 27 b attached to the first intermediate shaft 15 is integrally attached to the second intermediate shaft 16. The second idle driven gear 27c constitutes the first idle gear train 27A together with the idle drive gear 27a and the first idle driven gear 27b described above. The second intermediate shaft 16 is rotatable relative to the second intermediate shaft 16 at positions corresponding to the third speed drive gear 23a and the fifth speed drive gear 25a provided around the first main shaft 11, respectively. A second speed drive gear 22a and a fourth speed drive gear 24a are provided. Further, the second intermediate shaft 16 includes a second intermediate shaft 16 and a second speed drive gear 22a or a fourth speed drive gear 24a between the second speed drive gear 22a and the fourth speed drive gear 24a. Is provided with a second shifter 52 for shifting or connecting the two. When the second shifter 52 shifts in-gear at the second speed connection position, the second intermediate shaft 16 and the second speed drive gear 22a rotate together, and the second shifter 52 shifts to the fourth speed. When in-gearing at the connecting position, the second intermediate shaft 16 and the fourth speed drive gear 24a rotate together, and when the second shifter shifter 52 is in the neutral position, the second intermediate shaft 16 is in the second speed. The drive gear 22a and the fourth speed drive gear 24a rotate relative to each other.

A first shared driven gear 23b, a second shared driven gear 24b, a parking gear 21, and a final gear 26a are integrally attached to the counter shaft 14 in order from the side opposite to the engine 6 side.
Here, the first shared driven gear 23b meshes with the third speed drive gear 23a attached to the connecting shaft 13 to form the third speed gear pair 23 together with the third speed drive gear 23a, The second speed gear pair 22 is configured together with the second speed drive gear 22a by meshing with the second speed drive gear 22a provided on the intermediate shaft 16.
The second shared driven gear 24b meshes with the fifth speed drive gear 25a provided on the first main shaft 11 to form the fifth speed gear pair 25 together with the fifth speed drive gear 25a, and the second intermediate shaft. 16 is engaged with a fourth speed drive gear 24a to constitute a fourth speed gear pair 24 together with the fourth speed drive gear 24a.
The final gear 26 a meshes with the differential gear mechanism 8, and the differential gear mechanism 8 is connected to the drive wheels DW and DW via the drive shafts 9 and 9. Therefore, the power transmitted to the counter shaft 14 is output from the final gear 26a to the differential gear mechanism 8, the drive shafts 9, 9, and the drive wheels DW, DW.

  A third idle driven gear 27d that meshes with a first idle driven gear 27b attached to the first intermediate shaft 15 is integrally attached to the reverse shaft 17. The third idle driven gear 27d constitutes a second idle gear train 27B together with the above-described idle drive gear 27a and first idle driven gear 27b. The reverse shaft 17 is provided with a reverse drive gear 28 a that meshes with a reverse driven gear 28 b attached to the first main shaft 11 so as to be rotatable relative to the reverse shaft 17. The reverse drive gear 28a constitutes the reverse gear train 28 together with the reverse driven gear 28b. Further, a reverse shifter 53 for connecting or releasing the reverse shaft 17 and the reverse drive gear 28a is provided on the opposite side of the reverse drive gear 28a from the engine 6 side. When the reverse shifter 53 is in-gear at the reverse connection position, the reverse shaft 17 and the reverse drive gear 28a rotate together. When the reverse shifter 53 is at the neutral position, the reverse shaft 17 and the reverse drive The gear 28a rotates relative to the gear 28a.

  The first shifter 51, the second shifter 52, and the reverse shifter 53 use a clutch mechanism having a synchronization mechanism (synchronizer mechanism) for matching the shaft to be connected and the rotational speed of the gear.

  The transmission 20 configured as described above has an odd-numbered gear group consisting of a third speed drive gear 23a and a fifth speed drive gear 25a on the first main shaft 11, which is one of the two transmission shafts. A first gear group) and an even-stage gear group (first gear group) composed of a second-speed drive gear 22a and a fourth-speed drive gear 24a on the second intermediate shaft 16, which is the other of the two transmission shafts. 2 gear groups) are provided.

With the above configuration, the vehicle drive device 1 of the present embodiment has the following first to fifth transmission paths.
(1) In the first transmission path, the crankshaft 6a of the engine 6 includes the first main shaft 11, the planetary gear mechanism 30, the connecting shaft 13, and the third speed gear pair 23 (third speed drive gear 23a, first common use). This is a transmission path connected to the drive wheels DW and DW via the driven gear 23b), the counter shaft 14, the final gear 26a, the differential gear mechanism 8, and the drive shafts 9 and 9. Here, the reduction gear ratio of the planetary gear mechanism 30 is set so that the engine torque transmitted to the drive wheels DW and DW via the first transmission path corresponds to the first speed. That is, the reduction ratio obtained by multiplying the reduction ratio of the planetary gear mechanism 30 and the reduction ratio of the third speed gear pair 23 is set to be equivalent to the first speed.

(2) In the second transmission path, the crankshaft 6a of the engine 6 has the second main shaft 12, the first idle gear train 27A (the idle drive gear 27a, the first idle driven gear 27b, the second idle driven gear 27c), the second 2 intermediate shaft 16, second speed gear pair 22 (second speed drive gear 22a, first shared driven gear 23b) or fourth speed gear pair 24 (fourth speed drive gear 24a, second shared driven gear) 24b), a transmission path connected to the drive wheels DW and DW via the counter shaft 14, the final gear 26a, the differential gear mechanism 8, and the drive shafts 9 and 9.

(3) In the third transmission path, the crankshaft 6a of the engine 6 is used for the first main shaft 11, the third speed gear pair 23 (the third speed drive gear 23a, the first shared driven gear 23b) or the fifth speed. Through the gear pair 25 (the fifth speed drive gear 25a and the second shared driven gear 24b), the counter shaft 14, the final gear 26a, the differential gear mechanism 8, and the drive shafts 9 and 9, without the planetary gear mechanism 30. And a transmission path coupled to the drive wheels DW and DW.

(4) In the fourth transmission path, the motor 7 is connected to the planetary gear mechanism 30 or the third speed gear pair 23 (third speed drive gear 23a, first shared driven gear 23b) or fifth speed gear pair 25 ( 5th speed drive gear 25a, second shared driven gear 24b), counter shaft 14, final gear 26a, differential gear mechanism 8, and drive shafts 9 and 9 are connected to drive wheels DW and DW. It is.

(5) In the fifth transmission path, the crankshaft 6a of the engine 6 is connected to the second main shaft 12, the second idle gear train 27B (idle drive gear 27a, first idle driven gear 27b, third idle driven gear 27d), reverse Shaft 17, reverse gear train 28 (reverse drive gear 28a, reverse driven gear 28b), planetary gear mechanism 30, connecting shaft 13, third speed gear pair 23 (third speed drive gear 23a, first common use) This is a transmission path connected to the drive wheels DW and DW via the driven gear 23b), the counter shaft 14, the final gear 26a, the differential gear mechanism 8, and the drive shafts 9 and 9.

  The vehicle drive device 1 configured as described above controls the connection / disconnection of the lock mechanism 61, the first and second clutches 41, 42, and the first shifter 51, the second shifter 52, and the reverse shifter. By controlling the connection position 53, the engine 6 can perform the first to fifth speed traveling and the reverse traveling.

  In the first speed traveling, the driving force is transmitted to the drive wheels DW and DW through the first transmission path by fastening the first clutch 41 and connecting the lock mechanism 61. In the second speed traveling, the driving force is transmitted to the drive wheels DW and DW via the second transmission path by engaging the second clutch 42 and in-gearing the second shifter shifter 52 at the second speed connection position. In the third speed running, the first clutch 41 is engaged and the first shifter 51 is in-geared at the third speed connection position, whereby the driving force is transmitted to the drive wheels DW and DW via the third transmission path. Is done.

  Further, in the fourth speed traveling, the second clutch 42 is engaged and the second shifter 52 is in-geared at the fourth speed connecting position so that the driving force is applied to the drive wheels DW and DW via the second transmission path. In the fifth speed traveling, the first clutch 41 is engaged and the first shifter 51 is in-geared at the fifth speed connection position, so that the driving force is supplied to the drive wheels DW and DW via the third transmission path. Is transmitted to. Further, the second clutch 42 is engaged and the reverse shifter 53 is connected, whereby reverse travel is performed via the fifth transmission path.

  Further, even if the lock mechanism 61 is connected while the engine is running, the first and second shifter shifters 51 and 52 are in-gear and pre-shifted to assist or regenerate by the motor 7, and even during idling The engine 6 can be started by the motor 7 or the battery 3 can be charged. Further, the first and second clutches 41 and 42 can be disconnected and the EV 7 can be driven by the motor 7. The EV travel mode includes a first speed EV mode in which the first and second clutches 41 and 42 are disconnected and the lock mechanism 61 is connected to travel through the fourth transmission path, and the first speed change mode. The third speed EV mode that travels through the fourth transmission path by in-gearing the shifter 51 at the third-speed connection position, and the fourth speed by in-gearing the first shifter 51 at the fifth-speed connection position. There is a fifth speed EV mode that travels via a transmission path.

  As shown in FIG. 3, the motor 7 is connected to a power drive unit (hereinafter referred to as PDU) 2 that controls its operation. The PDU 2 supplies power to the motor 7, and Connected to a battery that charges power. That is, the motor 7 is driven by the electric power supplied from the battery 3 via the PDU 2, and performs regenerative power generation by the rotation of the drive wheels DW and DW and the power of the engine 6 at the time of decelerating traveling to charge the battery 3. (Energy recovery) can be performed.

  The PDU 2 is connected to a control device 5 for performing various controls of the entire vehicle. The control device 5 includes a gradient sensor 55 that detects the gradient of the road surface on which the vehicle contacts the ground, a vehicle speed sensor 56 that detects the vehicle speed of the vehicle, an accelerator pedal sensor 57 that detects an operation amount (depression amount) of the accelerator pedal, A brake pedal sensor 58 that detects an operation amount (depression amount) and an external air pressure sensor 59 that detects an external air pressure of the vehicle are connected.

  Further, the control device 5 includes a required driving force determining means 81, a battery state detecting means 82, and a gear position determining means 83. By the above-described sensors 55 to 59 and the like, an acceleration request, a braking request, an engine speed, and a motor speed. The motor temperature, the rotation speed of the first and second main shafts 11 and 12, the rotation speed of the counter shaft 14, etc., the vehicle speed, the shift position, the SOC (State of Charge), etc. are inputted, while the signal for controlling the engine 6; Signals for controlling the motor 7, signals indicating the power generation state / charge state / discharge state of the battery 3, signals for controlling the first and second shift shifters 51, 52 and the reverse shifter 53, connection of the lock mechanism 61 (lock ) And open (neutral) control signals are output.

  The control device 5 has a control map Map as shown in FIG. 4 for determining whether various controls can be performed according to the SOC of the battery 3, and basically starts ENG based on the control map Map. It is determined whether or not idle stop, deceleration regeneration, ENG disconnection, EV travel, and air conditioner compressor drive are possible. In FIG. 4, ○ can be implemented, × is prohibited, and Δ is conditional implementation.

  In this control map Map, the SOC is classified into four zones, C zone, B zone, A zone, and D zone, from the smallest to the largest, and the A zone is further divided into the A-L zone, from the smallest to the largest. It is classified into three zones, A-M zone and A-H zone, and is divided into six zones in total. And in the D zone near the maximum charge amount, deceleration regeneration and ENG disconnection are allowed with conditions, EV travel and idle stop are prohibited in the B zone and C zone, and the A-M zone is controlled as the target charge amount. Yes.

  The requested driving force determining means 81 is configured to counter the counter shaft 14 according to the vehicle speed V detected by the vehicle speed sensor 56, the accelerator pedal operation amount detected by the accelerator pedal sensor 57, and the brake pedal operation amount detected by the brake pedal sensor 58. The required driving force that needs to be output from is acquired. The required driving force determining means 81 acquires the required driving force using the shift map M of FIG. 5 stored in a ROM (not shown) in the ECU 5.

  As a result, the control device 5 controls the running state of the vehicle (ENG running, EV running, HEV running) and the gear stage of the transmission 20 based on the control map of FIG. 4 and the shift map M of FIG.

  The shift map M is set so that during the engine running, only the regeneration is performed without assisting by the motor 7 from the viewpoint of fuel efficiency, and the EV running is performed as much as possible by the energy accumulated by the regeneration. For this reason, the engine 6 does not output a torque higher than the BSFC bottom torque except for the lowest possible gear stage, and the motor 7 does not have the lowest possible gear, and the throttle valve is fully open (WOT: Wide Open Throttle). Assist is allowed only when there is a pre-shift in the gear stage or the gear stage one stage below.

  The shift map M has an upshift line and a downshift line that are set to be offset from the BSFC bottom torque line so as to follow the BSFC bottom torque line that bottom-traces the BSFC of the engine 6 for each shift stage. Further, as shown in FIG. 6, the shift map M is a pre-shift line following the up-shift line and the down-shift line for pre-shifting to the next shift stage immediately before crossing each up-shift line and down-shift line. Have each. Hysteresis is provided between the upshift line and the downshift line to suppress shift hunting in which the shift state frequently changes.

  Further, as shown in FIG. 7, the upshift line, the downshift line, and the preshift line are offset to the high torque side when the motor 7 has assistable torque and is in the assistable state that is preshifted down by one step. To do.

Further, the upshift line, the downshift line, and the preshift line are offset to the high torque side or the low torque side according to the output upper limit torque of the engine 6. For example, when a decrease in the external air pressure is detected from the external air pressure sensor 59 and the engine output upper limit torque is decreased due to high altitude travel, by offsetting the upshift line, the downshift line, and the preshift line to the low torque side, The engine 6 can be used for a long time at the low speed stage, and a desired torque can be obtained. Therefore, as shown in the table in FIG. 7, the gear stage selected in the regions a and b is changed according to the position of each shift line.
When the accelerator pedal is fully opened or the throttle valve is fully opened, the engine 6 is operated at the maximum output.

Then, the gear stage is searched from the shift map M in FIG. 5 based on the vehicle speed and the accelerator opening, and as shown in FIG. 8, the vehicle speed and the gear stage are input to the flat up-line map and Search for upshift line output torque. Note that the input vehicle speed value is offset with respect to the actual vehicle speed according to the temperature of the sudden brake, engine coolant, or clutch hydraulic oil. Then, the gear efficiency is integrated with the upshift line torque obtained at each gear stage, and further, the torque change rate of the engine 6 is integrated. Further, assistable torque is added, and the target gear stage is selected by comparing the torque value obtained for each gear stage with the target output torque.
As shown in FIG. 8, when the road surface is a light uphill, the shift map searches for the upshift line output torque at each gear stage using another upshift line map. In the case of downshifting, the same procedure is performed.

  Here, in the present embodiment, when the vehicle is traveling with the even-numbered gear (second gear) selected during normal traveling without the battery output limitation or the motor operation limitation, the odd-numbered gear (first gear lower) is selected. (Shift stage) is pre-shifted.

  Specifically, as shown in FIG. 6, when upshifting from the first speed travel to the second speed travel, a preshift is performed by in-gearing the second shifter shifter 52 at the second speed connection position, Thereafter, the second clutch 42 is engaged and the first clutch 41 is released, and the driving force of the engine 6 is transmitted to the drive wheels DW and DW via the second transmission path. Maintain the connection at the connection position.

  Further, when downshifting from the third speed travel to the second speed travel, preshift is performed by in-gearing the second shifter shifter 52 at the second speed connection position, and then the second clutch 42 is engaged. At the same time, the first clutch 41 is released, and the driving force of the engine 6 is transmitted to the drive wheels DW and DW via the second transmission path. At that time, the first shifter 51 is opened from the third speed connection position to the neutral position, and the lock mechanism 61 is connected to the first speed connection position.

  As a result, while the vehicle is traveling with the second speed selected, pre-shifting is performed to the first gear, and the motor 7 can be assisted and regenerated even during the second speed traveling. Further, regeneration is performed in a state where the shift is pre-shifted to an odd-numbered stage that is one stage lower than that in the case where regeneration is performed in a state that is pre-shifted to an odd-numbered stage that is one stage higher.

  In addition, the upshift from the second speed traveling (even-numbered stage) to the third speed traveling (odd-numbered stage) is performed by in-gearing the first speed-shifting shifter 51 at the third-speed connecting position, and thereafter The first clutch 41 is engaged and the second clutch 42 is released, and the driving force of the engine 6 is transmitted to the drive wheels DW and DW via the third transmission path. Then, the second shifter 52 is opened from the second speed connection position to the neutral position. In addition, the downshift from the second speed running (even number stage) to the first speed running (odd number stage) is performed by pre-shifting by connecting the lock mechanism 61 to the first speed connection position, and then the first clutch 41. And the second clutch 42 is released, and the driving force of the engine 6 is transmitted to the drive wheels DW and DW via the third transmission path. Then, the second shifter 52 is opened from the second speed connection position to the neutral position.

  In addition, as shown in FIG. 9, the driver's required driving force is the BSFC bottom torque of the engine 6 during the even-numbered stage (fourth speed) traveling in which the pre-shift is performed to the odd-numbered stage (third speed stage) one stage lower. When the output is exceeded, the odd-numbered gears are not exchanged and can be handled with the assistance of the motor 7. Further, when downshifting (kickdown) is performed by further depressing the accelerator pedal, the inertia phase pull-in can be canceled by the assistance of the motor 7, and the driving force loss can be suppressed. On the other hand, as shown in FIG. 10, when downshifting during even-numbered (fourth speed) traveling in which an odd number (first speed) is shifted to the first odd number (5th speed), the gear is shifted to the odd numbered position one lower. Therefore, the assist by the motor 7 is not performed in the meantime, and the driving force loss is large during the replacement. In the timing charts of FIG. 9 and subsequent figures, symbol AP is the accelerator pedal opening, Ne is the engine 6 rotational speed, Nm is the motor 7 rotational speed, C41 is the state of the first clutch 41, and C42 is the second clutch. 42, Te is the torque of the engine 6, Tm is the assist or regenerative torque of the motor 7, and Tds is the output from the counter shaft.

  Further, as shown in FIG. 11B, when the assist by the motor 7 is possible, the assist limit is set to the normal kick-down line (hereinafter referred to as the KD line), that is, the engine drive limit. An offset KD line is set. In this case, when the SOC is reduced by the assist of the motor 7, the KD line also drops accordingly, so that the driver's required driving force can be satisfied even though the accelerator pedal is depressed. I was kicking down when I couldn't.

  For this reason, in this embodiment, as shown in FIG. 11A, the SOC decreases and the assist amount gradually decreases, and a deviation from the required driving force (shaded portion in FIG. 11A) appears. Even when the required driving force can no longer be satisfied, the kick-down is not triggered but triggered by the driver's depression of the accelerator pedal. Thereby, it is possible to perform the kickdown without giving the driver a sense of incongruity in accordance with the timing requested by the driver.

  FIG. 12 is a timing chart showing a state change when upshifting from the fourth speed running, in which the pre-shift is performed at the third speed stage, and the motor 7 is performing a regenerative operation to the fifth speed running. In this case, before switching the transmission path in the transmission 20 from the second transmission path via the fourth speed gear pair 24 to the third transmission path via the fifth speed gear pair 25, the control device 5 The motor 7 is controlled so that the regenerative torque Tm of the motor 7 becomes 0 [Nm], the torque Te of the engine 6 during the BSFC (Brake Specific Fuel Consumption) bottom operation is lowered, and the driving force is adjusted. The BSFC bottom operation is a fixed point operation at a constant rotational speed that minimizes the amount of fuel consumed. Then, the connection position of the first gear shifter 51 of the motor 7 is switched from the third speed connection position to the fifth speed connection position.

  Next, the control device 5 increases the degree of engagement of the first clutch 41 simultaneously with the start of the torque phase for releasing the engagement state of the second clutch 42. Then, based on the clutch torque of the first clutch 41, the driving force is adjusted to a specified ratio. Thereafter, in the inertia phase in which the first clutch 41 starts to be engaged and the engine speed decreases, the remaining ratio is matched based on the input / output speed ratio GRatio to complete the driving force matching during the shift. And the 1st clutch 41 is completely fastened and switches to 5th speed driving | running | working.

  The input / output rotational speed ratio GRatio is a value obtained by converting the rotational speed ratio between the first main shaft 11 and the counter shaft 14 into a table using a predetermined table (not shown). Therefore, GRatio converges within a certain range based on the gear ratio of each gear stage when the clutch is completely engaged, and changes sequentially according to the degree of progress at the time of gear shifting. It can be used as an index indicating the degree of progress.

  Further, the motor 7 is over-rotated (rotation speed higher than a predetermined rotation speed), the motor 7 is in a high temperature state (higher than the first predetermined temperature), or the battery 3 is in an extremely low temperature state (lower temperature than the second predetermined temperature). In some cases, when the vehicle is traveling with even-numbered steps selected, the abnormal temperature rise of the motor 7 is prevented, and the output of the battery 3 is reduced and the output of the motor 7 is also reduced. Pre-shift to odd stages higher than the stage. However, in this case, the assist of the motor 7 is within the driving force range of the engine 6.

  As shown in FIG. 13, in the second speed running in which the battery 3 is in a very low temperature state and the pre-shift is performed to the third speed higher than the first speed, the downshift from the second speed to the first speed is performed. After the first shifter 51 is released from the third speed connection position to the neutral position, the second clutch 42 is released, and the first clutch 41 is slidably engaged in the half-clutch state. Is controlled in accordance with the rotational speed of the engine 6 so that each rotational speed does not drop. Thereafter, in a state where the first clutch 41 is released, the lock mechanism 61 is in-geared to the first speed connection position, and the first clutch 41 is fastened. Thereby, it is possible to suppress a shock when the lock mechanism 61 is in-geared to the first speed connection position during the downshift.

  Further, FIG. 14 is a timing chart showing a change in state when the fifth speed on the first stage is preshifted in the fourth speed and is downshifted to the third speed on the lower stage by increasing the accelerator opening. is there. If the downshift line is set to the BSFC bottom torque line except for the throttle fully open state, the regeneration amount of the motor 7 gradually decreases as the accelerator pedal is depressed, and when it reaches the downshift line, the regeneration occurs. The amount is 0 Nm. At this time, the first clutch 41 is engaged while sliding, the second clutch 42 is partially disconnected, and the first shifter 51 is shifted from the fifth speed connection position to the third speed connection position. Replace the gear position. The engine 6 maintains the output along the BSFC bottom torque line, the first clutch 41 is completely engaged, and the excess torque is gradually absorbed by the regeneration of the motor 7 from the end of the inertia phase.

  In addition, as shown in FIG. 15, when the fifth speed is selected and the vehicle is traveling, when the accelerator opening is kicked down to the third speed due to a rapid increase, the first clutch 41 starts to be released, While the second clutch 42 starts to be engaged and the rotational speed of the engine 6 is increasing in the inertia phase, the second clutch 42 is temporarily engaged in the slip engagement state and switched to the fourth speed stage. After the slip engagement state is released, the first shifter 51 is switched from the fifth speed connection position to the third speed connection position. Thereafter, the second clutch 42 is disengaged and the first clutch 41 is engaged, thereby downshifting to the third speed. The length of the inertia phase is determined by whether the target stage by the downshift is the fourth speed stage that is one step lower or the third speed stage that is two steps lower.

  FIG. 16 shows a travel performance diagram of the hybrid vehicle drive device 1. The three lines indicated by the thin broken line A are the maximum driving force that the motor 7 can originally output in the first speed EV traveling mode, the third speed EV traveling mode, and the fifth speed EV traveling mode, respectively. The three lines indicated by respectively indicate the limit values of the driving force output as the driving force by the motor 7 when traveling in the first speed EV traveling mode, the third speed EV traveling mode, and the fifth speed EV traveling mode. ing. That is, the driving force that can be output by the motor 7 when traveling in the first speed EV traveling mode is not the maximum driving force that can be output by the motor 7 (indicated by 1st of the thin line A), but the engine 6 is started. Is a driving force limit value (indicated by 1st of a thin broken line B) that is limited by removing the driving force used in the above. Further, five lines indicated by a thick line C indicate the relationship between the vehicle speed and the rotation speed of the crankshaft of the engine 6 when the engine travels from the first speed to the fifth speed. Five lines indicated by a thick broken line D indicate the maximum driving force that can be output by the engine 6 when traveling from the first speed to the fifth speed. The five lines indicated by the thick dashed-dotted line E indicate the maximum driving force that can be output by the engine 6 and the motor 7 when traveling with the driving force of both the engine 6 and the motor 7 at the first to fifth speeds. Indicates the total.

  Here, in this embodiment, when the engine 6 is driven in the WOT state while being assisted by the motor 7 and is upshifted during traveling (hereinafter referred to as WOT assist traveling), the assist of the motor 7 is interrupted when the gear is changed. 16 is compensated for by the clutch engagement capacity as shown in the XVI portion of FIG.

  For example, FIG. 17 is a timing chart showing a state change when the assist of the motor 7 is switched from the first speed to the third speed when upshifting from the first speed travel to the second speed travel in the WOT assist travel. . In this case, the torque sharing is switched by gripping the first clutch 41 and the second clutch 42, and after the torque phase when the engagement of the first clutch 41 is released, the lock mechanism 61 is connected to the first speed connection position during the inertia phase. When the first shifter 51 is in-geared at the third speed connecting position and the gears are switched, the engagement capacity of the second clutch 42 is increased by the assist torque of the motor 7. Thereby, torque loss at the time of gear change can be compensated, and shift shock can be suppressed.

  As described above, according to the hybrid vehicle drive device 1 of the present embodiment, the upshift line set by being offset from the BSFC bottom torque line for bottom tracing the BSFC of the internal combustion engine for each shift stage, and The gear map is searched based on the vehicle speed and the accelerator opening from the shift map having a downshift line, and the output torque at each gear stage is searched according to the vehicle speed, and the target torque is compared with the target output torque. Since the gear stage is selected, fuel consumption can be improved and good drivability can be provided.

In addition, this invention is not limited to each embodiment mentioned above, A deformation | transformation, improvement, etc. are possible suitably.
For example, the vehicle drive device 1 has an odd-numbered stage gear disposed on a first main shaft 11 that is an input shaft to which a motor 7 of a twin clutch transmission is connected, and a second input shaft that is not connected to the motor 7. Although the even-numbered gear is arranged on the intermediate shaft 16, the present invention is not limited to this. An even-numbered gear is arranged on the first main shaft 11 that is the input shaft to which the motor 7 is connected, and the input shaft is not connected to the motor 7. An odd-numbered gear may be arranged on a certain second intermediate shaft 16.

  Further, in addition to the planetary gear mechanism 30 as the first-speed drive gear, the third-speed drive gear 23a, and the fifth-speed drive gear 25a as the odd-numbered speed stages, the seventh, ninth,... In addition to the second-speed drive gear 22a and the fourth-speed drive gear 24a, gears may be provided as sixth, eighth,...

  In addition, a first common driven gear 23b, a fourth speed drive gear 24a, and a fifth speed are configured such that the driven gear attached to the counter shaft 14 is meshed with the second speed driving gear 22a and the third speed driving gear 23a. Although the second shared driven gear 24b meshed with the speed drive gear 25a is combined, the present invention is not limited to this, and a plurality of driven gears meshed with each gear may be provided. Further, the planetary gear mechanism 30 is exemplified as the first speed drive gear, but the present invention is not limited to this, and the first speed drive gear may be provided in the same manner as the third speed drive gear 23a.

DESCRIPTION OF SYMBOLS 1 Hybrid vehicle drive device 2 Control device 3 Battery (power storage means)
6 Engine (Internal combustion engine)
7 Motor (electric motor)
11 First spindle (first input shaft)
14 Counter shaft (output shaft)
16 Second intermediate shaft (second input shaft)
20 Transmission 22 Second-speed gear pair 23 Third-speed gear pair 24 Fourth-speed gear pair 25 Fifth-speed gear pair 30 Planetary gear mechanism 41 First clutch (first connecting / disconnecting means)
42 Second clutch (second connecting / disconnecting means)
51 First shifter (first synchronizer)
52 Second shifter (second synchronizer)
61 Lock mechanism (first synchronizer)

Claims (11)

An internal combustion engine;
An electric motor,
A power storage device for supplying electric power to the electric motor;
A first input shaft connected to the electric motor and selectively connected to the internal combustion engine via first connecting / disconnecting means, and a first input shaft selectively connected to the internal combustion engine via second connecting / disconnecting means. Two input shafts, an output shaft for outputting power to the driven part, a first transmission gear mechanism capable of forming a plurality of first shift stages between the first input shaft and the output shaft, and the second input shaft A second transmission gear mechanism capable of configuring a plurality of second shift speeds between output shafts, a first synchronizer for switching the first transmission gear mechanism so as to select one of the plurality of first shift speeds; A hybrid vehicle drive device comprising: a transmission mechanism comprising: a second synchronization device that switches the second transmission gear mechanism so as to select any one of the plurality of second gear positions;
From each shift stage, a shift map having an upshift line and a downshift line set by offsetting from the BSFC bottom torque line for bottom tracing the BSFC of the internal combustion engine is used to change the gear stage based on the vehicle speed and the accelerator opening. A hybrid vehicle drive device characterized by searching for an output torque at each gear stage according to a vehicle speed and comparing the output torque with a target output torque to select a target gear stage.   2. The hybrid vehicle drive device according to claim 1, wherein the shift map offsets the upshift line, the downshift line, and the preshift line to the high torque side in accordance with the assistable torque by the electric motor.   2. The hybrid vehicle according to claim 1, wherein the shift map offsets the upshift line, the downshift line, and the preshift line to the high torque side or the low torque side according to the output upper limit torque of the internal combustion engine. Drive device. When the accelerator pedal is fully open or the throttle is fully open, the internal combustion engine is operated at maximum power,
2. The hybrid vehicle drive device according to claim 1, wherein the internal combustion engine is operated at an output in accordance with a BSFC bottom torque when the accelerator pedal is not fully opened or the throttle is fully opened.   When the vehicle is traveling with a predetermined second gear selected by the second synchronizer, the first synchronizer pre-shifts to a first gear lower than the predetermined second gear. The drive device for a hybrid vehicle according to claim 1. When the second shift stage is selected and the vehicle is traveling with the pre-shift performed at the first shift stage, if the motor can assist, the kick-down line is set to the drive limit of the internal combustion engine. It is set with the assist limit of
The kickdown is performed by depressing the driver's accelerator pedal when the assist amount by the electric motor decreases due to a decrease in the amount of power stored in the power storage device and the required driving force cannot be satisfied. The hybrid vehicle drive device according to claim 1.   When the first synchronizer selects the predetermined first shift speed and travels, when the shift is downshifted to the first shift speed lower by two due to a sudden increase in the accelerator opening, the first and second While both of the connecting / disconnecting means are grasped by sliding engagement, continuously from the predetermined first gear to the first gear below the second gear through the second gear below the first gear during the inertia phase. The hybrid vehicle drive device according to claim 1, wherein: An internal combustion engine;
An electric motor,
A power storage device for supplying electric power to the electric motor;
A first input shaft connected to the electric motor and selectively connected to the internal combustion engine via first connecting / disconnecting means, and a first input shaft selectively connected to the internal combustion engine via second connecting / disconnecting means. Two input shafts, an output shaft for outputting power to the driven part, a first transmission gear mechanism capable of forming a plurality of first shift stages between the first input shaft and the output shaft, and the second input shaft A second transmission gear mechanism capable of configuring a plurality of second shift speeds between output shafts, a first synchronizer for switching the first transmission gear mechanism so as to select one of the plurality of first shift speeds; A hybrid vehicle drive device comprising: a transmission mechanism comprising: a second synchronization device that switches the second transmission gear mechanism so as to select any one of the plurality of second gear positions;
When upshifting from the first gear to the second gear in the throttle fully open state, after releasing the fastening of the first connecting / disconnecting means, the fastening capacity of the second connecting / disconnecting means is increased during the inertia phase. A hybrid vehicle drive device that performs pre-shifting from the first gear to a first gear that is two steps higher than the first gear. An internal combustion engine;
An electric motor,
A power storage device for supplying electric power to the electric motor;
A first input shaft connected to the electric motor and selectively connected to the internal combustion engine via first connecting / disconnecting means, and a first input shaft selectively connected to the internal combustion engine via second connecting / disconnecting means. Two input shafts, an output shaft for outputting power to the driven part, a first transmission gear mechanism capable of forming a plurality of first shift stages between the first input shaft and the output shaft, and the second input shaft A second transmission gear mechanism capable of configuring a plurality of second shift speeds between output shafts, a first synchronizer for switching the first transmission gear mechanism so as to select one of the plurality of first shift speeds; A hybrid vehicle drive device comprising: a transmission mechanism comprising: a second synchronization device that switches the second transmission gear mechanism so as to select any one of the plurality of second gear positions;
The downshift line of the shift map is set to the BSFC bottom torque line except for the throttle fully open state,
When the predetermined second gear is selected and the vehicle is traveling, when the first gear on the first gear is preshifted and the shift is downshifted to the first gear on the lower gear by increasing the accelerator opening. The internal combustion engine maintains the output along the BSFC bottom torque line, and the shift stage is changed when the torque of the electric motor becomes 0 Nm, and excess torque is supplied to the electric motor from the end of the inertia phase. The hybrid vehicle drive device according to claim 1, wherein the hybrid vehicle drive device is absorbed by regeneration.   When the power storage device is in an extremely low temperature state, when downshifting from the predetermined second shift stage, the first connecting / disconnecting means is slidably engaged so that the rotational speed of the electric motor matches the rotational speed of the internal combustion engine. Then, in a state where the first connecting / disconnecting means is opened, the first synchronizing device in-gears the first gear position one step below, and then the first connecting / disconnecting means is fastened. The drive device for hybrid vehicles of any one of Claim 1 to 9.   When the vehicle is traveling with the predetermined second speed selected, if the first synchronizer pre-shifts to the first speed, the transmission is transmitted to the internal combustion engine by the connection of the second connecting / disconnecting means. The drive power for a hybrid vehicle according to any one of claims 1 to 10, wherein the power to be absorbed can be absorbed by regeneration of the electric motor.

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