JP2003165358A - Power transmission mechanism - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To promptly start an internal combustion engine in a stop state while its own vehicle is traveling. <P>SOLUTION: In a state where the internal combustion engine is in a stop state, and the engine and a transmission are separated by a main clutch, it is determined whether the vehicle is in an EV traveling mode where the vehicle is driven by a motor (STEP S01). When in the mode, a vehicle speed V is determined from among 1-5 speed ranges in which the engine can be started by not less than a prescribed start possible number of revolutions #NS, and a pair of gears corresponding to each range is selected to connect the input and output shafts of the transmission (STEP S03-S12). It is determined whether an output required by a driver is not more than an output limit value that the motor can output (STEP S13). When it is YES, it is determined whether the residual capacity SOC of the battery that supplies power to the motor is outside of an immediate power generation requiring range (STEP S14). When it is NO, the engine and the transmission are connected via the main clutch. <P>COPYRIGHT: (C)2003,JPO

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention
For hybrid vehicles, etc., which are driven by using
Mounted, at least one of the internal combustion engine and the motor
Power transmission mechanism that transmits the driving force of the other vehicle to the driving wheels of the vehicle
Related. 2. Description of the Related Art Conventionally, for example, a power transmission mechanism 1 shown in FIG.
, The internal combustion engine 2, the motor 3, the input shaft 4,
The power shaft 5, the main clutch 6, the transmission 7, and the driving force transmission
At least an internal combustion engine
The driving force of either the vehicle 2 or the motor 3 is used to drive the vehicle.
A power transmission mechanism 1 for transmitting to wheels W, W is known. This
In the power transmission mechanism 1, the internal combustion engine 2
Is connected to the input shaft 4 of the transmission 7 through the
3 is connected to a transmission 7 via a driving force transmission switching unit 8.
Are connected to the output shaft 5. The transmission 7 is controlled by, for example, an ECU 9.
Number of shift actuators (not shown) are driven,
Any one of multiple gear pairs (not shown) with different ratios is selected
Transmission that controls the shifting operation by
It belongs to Ipu. Further, the driving force transmission switching unit 8 is provided with an EC
A switching actuator 8a controlled by U9,
Switching thinner driven by the switching actuator 8a
And a switching clutch 8b.
b, the rotating shaft 3a of the motor 3 and the input shaft of the transmission 7
Connection or disconnection with either 4 or output shaft 5
Switching mechanism. For example, when the vehicle is stopped
When the fuel engine 2 is started, the driving force transmission switching unit 8
Of the transmission 7 and the input shaft 4 of the transmission 7,
3 is transmitted to the internal combustion engine 2 to start the internal combustion engine 2.
Let Also, the vehicle is driven by the driving force of the motor 3, for example.
In the EV driving mode for driving, the driving force transmission switching unit 8
Connecting the rotating shaft 3a of the motor 3 and the output shaft 5 of the transmission 7
The driving force of the motor 3 is transmitted to the driving wheels W, W to
Is driven. In this EV driving mode, an example
For example, the internal combustion engine 2 is stopped and the main clutch 6
When the internal combustion engine 2 and the transmission 7 are separated from each other,
Are driven by the motor 3. [0004] The operation of the power transmission mechanism 1 will be described below.
Next, the operation of starting the internal combustion engine 2 in the EV running mode is described.
The operation will be described with reference to the accompanying drawings. FIG.
Of the power transmission mechanism 1 according to an example of the related art, in particular, EV
4 shows a process for starting the internal combustion engine 2 in the traveling mode.
It is a flowchart. First, in step S1 shown in FIG.
Means that the internal combustion engine 2 is stopped and the main clutch 6
When the fuel engine 2 and the transmission 7 are separated from each other,
Whether or not the vehicle is in the EV traveling mode in which the traveling is driven by the motor 3
Is determined. If the result of this determination is “NO”,
Proceeding to step S2, the running state at this point is continued and
The series of processing ends. On the other hand, if the determination result is “YES”
In the case of, the process proceeds to step S3. In step S3, for example,
Output related to accelerator pedal depressing operation etc.
Or, for example, a battery that supplies power to the motor 3
(Not shown), it is necessary to start the internal combustion engine 2 based on the remaining capacity and the like.
It is determined whether a request has occurred. This determination result is "N
In the case of "O", the process proceeds to step S2 described above. on the other hand,
If this determination is "YES", the flow proceeds to step S4.
Go ahead and select the shift speed that can be selected by the current speed of the vehicle and the transmission 7
Based on the ratio, the rotation speed of the input shaft 4 (input shaft rotation speed)
NI is a lower limit rotational speed for starting the internal combustion engine 2.
To be equal to or higher than a predetermined startable rotational speed # N0.
At the same time, the transmission 7 performs a shifting operation, and
The force shaft 4 and the output shaft 5 are connected. Next, in step S5, the clutch
Drive actuator 6a and the main clutch 6
By connecting the internal combustion engine 2 and the transmission 7 to
The internal combustion engine 2 is started at a predetermined startable rotation speed # N0 or more.
Let it. Then, in step S6, the internal combustion engine 2
The driving force is transmitted to the driving wheels W, W to drive the own vehicle.
To the ENG drive mode, and a series of processing ends.
You. [0008] By the way, the above prior art
According to the power transmission mechanism 1 according to an example of the operation, the internal combustion engine 2
After the start request is issued, the current speed of the own vehicle and the transmission 7
What gear ratios can be selected based on
One of them is selected, and the gear changing actuator is selected by the ECU 9.
The gears are driven to perform a gear shifting operation. For this reason, EV driving mode
Requires rapid load increase such as sudden acceleration.
Or the remaining capacity of the battery exceeds a predetermined value, for example.
Request to start the internal combustion engine 2
Even when it is generated, the internal combustion engine 1 is actually started
Up to a complicated process such as shifting operation.
There is a possibility that the internal combustion engine 2 cannot be started quickly.
The present invention has been made in view of the above circumstances, and the driving of the own vehicle is performed.
Start a stopped internal combustion engine quickly during operation.
It is an object to provide a power transmission mechanism capable of: Means for Solving the Problems According to the present invention, there is provided a method for solving the above problems.
The power of the present invention according to claim 1 for achieving the object.
The transmission mechanism is at least an internal combustion engine (for example, an actual
Internal combustion engine 11) or motor (for example, in the embodiment)
For example, any one of the motors 12) in the embodiment described later
One of the drive wheels of the own vehicle (for example,
Drive wheels W, W) to apply driving force to the drive wheels.
A power transmission mechanism for transmitting power to the internal combustion engine;
Input shaft (for example, an input in an embodiment described later)
Shaft 14) and an output shaft (e.g.,
For example, an output shaft 15) according to an embodiment described later is provided.
The input shaft and the output shaft are connected so that the gear ratio can be changed.
Then, the driving force of the internal combustion engine is transmitted to the driving wheels.
Transmission (for example, a transmission 1 in an embodiment described later)
7) is provided between the internal combustion engine and the transmission,
Connection for connecting or disconnecting the internal combustion engine and the transmission
Separating means (for example, a main unit in an embodiment described later)
Clutch 16) and a rotation shaft of the motor (for example,
Provided on the rotating shaft 12a) in the preferred embodiment.
Spindle rotation power transmission member (for example, in an embodiment described later)
Drive shaft gear 42a) and the output shaft.
Output shaft rotation power transmission member (for example,
Output side forward fifth speed gear 35b) in the configuration,
A driving force transmission capable of transmitting the driving force of the motor to the driving wheels.
Means (for example, a motor drive in an embodiment described later)
A power transmission unit 18) and the connection and separation means
The engine and the transmission are separated from each other, and
State in which the driving force of the motor is transmitted to the driving wheels
The transmission connects the input shaft and the output shaft.
The rotation speed of the input shaft when the
The input shaft speed NI) in the first embodiment starts the internal combustion engine.
A predetermined rotational speed (for example, in the embodiment described later)
The above change is made so as to be equal to or more than the startable rotation speed #NS).
The speed ratio is the speed of the host vehicle (for example,
Vehicle speed V), and the transmission sets the
Transmission control means for connecting a power shaft and the output shaft (for example,
Step S03 to step in the embodiment described later
S12), and the connection / separation unit is connected to the internal combustion engine by
And the transmission is separated, and
When the driving force of the motor is transmitted to the driving wheels,
When a request to start the internal combustion engine is issued,
The gear shift control means is connected to the output shaft.
The input shaft is connected to the internal combustion engine by the connection / separation means.
Internal combustion engine start control means for continuously starting the internal combustion engine
(For example, step S1 in the embodiment described later)
5). According to the power transmission mechanism having the above structure, the internal combustion engine
The engine is stopped and the internal combustion engine and the transmission are
The drive wheels are driven by the motor with the
In the running mode, the internal combustion engine must be started in advance.
In the standby state where the execution of the shifting operation has been completed.
You. That is, in this traveling mode, the shift control means
Is the input when the input shaft and output shaft are connected by the transmission.
If the number of rotations of the shaft exceeds the predetermined
Gear ratio according to the speed of the host vehicle.
The input shaft and the output shaft are connected via a machine. So, for example,
For example, the driver of the vehicle needs a sudden increase in load, such as sudden acceleration.
Required, or a battery that supplies power to the motor, for example.
When the remaining capacity of the battery falls below a predetermined value,
When a start request for the internal combustion engine is issued, simply
It connects the internal combustion engine and the transmission via connection disconnection means
Thus, the internal combustion engine can be started immediately. sand
That is, for example, after an internal combustion engine start request is issued,
Set the gear ratio according to both speeds, and
To operate the connection / separation means after performing
It is possible to start the internal combustion engine more quickly than
Wear. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below.
The power transmission mechanism will be described with reference to the accompanying drawings.
FIG. 1 shows the structure of a power transmission mechanism 10 according to an embodiment of the present invention.
FIG. 2 shows the speed (vehicle speed) V of the vehicle and the rotation of the input shaft.
It is a graph which shows the relationship of number NI. According to the present embodiment
Power transmission mechanism 10 is mounted on a hybrid vehicle, for example.
And at least one of the internal combustion engine 11 and the motor 12
Transmitting one of the driving forces to the driving wheels W of the own vehicle
And drive shafts 13, 1 connected to the respective drive wheels W, W
3, the input shaft 14, the output shaft 15, and the main clutch 1
6 having an input shaft 14 and an output shaft 15
7, a motor driving force transmission unit 18, and an ECU (electronic control unit).
19). Here, the transmission 1
7, the connecting gear 15a provided integrally with the output shaft 15
Differentials connected to the drive shafts 13
(Not shown) so as to always mesh with the gear 13a.
The internal combustion engine 11 includes a main clutch 16 and a transmission 1
7, mechanically to the drive wheels W, W via the drive shafts 13, 13
The motor 12 is connected to the motor
Gears 17 and drive wheels W and W via drive shafts 13 and 13
Mechanically connected. The main clutch 16 is a clutch for the internal combustion engine 11.
Clutch plate 16a connected to rank shaft 11a
And the transmission 17 is paired with the clutch plate 16a.
A clutch plate 16b connected to the force shaft 14.
You. The main clutch 16 has a clutch actuator.
The eta 21 is connected. Actuator for this clutch
The eta 21 is electrically connected to the ECU 19,
Under the control of the CU 19, the internal
The fuel engine 11 and the transmission 17 are connected or separated. The transmission 17 is controlled by the ECU
Are changed by driving the heaters 22, 23 and 24.
This is an automatic transmission type whose speed operation is controlled. Strange
The gear 17 is, for example, an input shaft 14 that is a main shaft.
And an output shaft 15 which is a counter shaft, and forwards 1 to 5
, 35, a reverse gear shaft (not shown) and
And a reverse gear train (not shown). And this
The input shaft 14, the output shaft 15, and the reverse gear shaft (shown in FIG.
(Abbreviated) are arranged in parallel with each other. The first to fifth forward gear pairs 31,...
Different gear ratios. In addition, advance 1-5
, 35 are mounted on the input shaft 14
Each input-side forward first to fifth gear 31a,..., 35a and output
Output-side forward first to fifth-speed gears 31 attached to shaft 15
b,..., 35b.
31a and 31b,..., 35a and 35b
Is engaged with. Here, the input-side forward first speed gear 31a and
The input-side forward second speed gear 32a is provided integrally with the input shaft 14.
Output side that is paired with the input side forward first speed gear 31a
A first forward gear 31b and an input second forward gear 32a;
A pair of output-side forward second speed gears 32 b is paired with the output shaft 15.
And a rotatable idle gear, actuating for 1st and 2nd speed
1st and 2nd speed synchro-clutch driven by the heater 22
Connected to or separated from the output shaft 15 by the
It is. The first and second speed actuators 22 transmit an electric
And is controlled by the ECU 19 to
Output-side forward first speed via the second-speed synchro clutch 36
Either the gear 31b or the output-side forward second speed gear 32b
Is selectively connected to the output shaft 15 or the output side
The first forward gear 31b and the output second forward gear 32b
Both are separated from the output shaft 15. This allows you to type
The shaft 14 and the output shaft 15 are connected to the first forward gear pair 31 or the front.
The gears are connected or disconnected via the second speed gear pair 32. The output-side forward third speed gear 33b and the output
The force-side forward fourth speed gear 34b is provided integrally with the output shaft 15.
And the front of the input side which is paired with the third forward gear 33b on the output side.
A third forward gear 33a and an output fourth forward gear 34b
, The input-side forward fourth-speed gear 34 a
Is a rotatable idle gear, and actuates for 3rd and 4th speed
3/4 speed synchro clutch driven by the
Connected to or separated from the input shaft 14 by the
You. The third and fourth speed actuators 23 are electrically connected to the ECU 19.
Are connected by the control of the ECU 19, and
Through the speed synchro clutch 37, the input side forward third speed gear
Either a 33a or the input-side forward fourth speed gear 34a
Is selectively connected to the input shaft 14, or
Both the third forward gear 33a and the input-side fourth forward gear 34a
Is separated from the input shaft 14. This allows the input shaft
14 and the output shaft 15 are in the third forward gear pair 33 or forward
It is connected or disconnected via a fourth speed gear pair 34. The output side forward fifth speed gear 35b is an output shaft.
The output side forward fifth speed gear
The input-side forward fifth speed gear 35a paired with the input shaft 35b is an input shaft 1
The idle gear is rotatable with respect to the fourth gear.
5-speed synchro clutch driven by tutor 24
Connected to or separated from the input shaft 14 by the
You. The rotating shaft 12 connected to the motor 12
a is provided with a motor driving force transmission unit 18;
The motor driving force transmission unit 18 is, for example,
To be an idle gear that is rotatably mounted
Moving rotary shaft gear 41a and driving rotary shaft gear 42a
, A starting actuator 43 and a starting actuator
Starting clutch serving as a friction element driven by the motor 43
44, a drive actuator 45, and a drive actuator
A driving clutch which forms a friction element driven by the eta 45
Switch 46 and the starting rotary shaft gear 41a.
The starting input shaft gear 41b provided integrally with the shaft 14 is
It is provided with. That is, the starting rotary shaft gear 41a is
The starting clutch driven by the moving actuator 43
Connected to or separated from the rotating shaft 12a by the
It is. The driving rotary shaft gear 42a is provided with a driving actuator.
The drive clutch 46 driven by the heater 45
Connected to the rotating shaft 12a so that the rotational speed ratio can be changed.
Or separated. The driving rotary shaft gear 42a is
An input which is an idle gear rotatable with respect to the input shaft 14
And the starting rotary shaft, which is paired with the fifth forward gear 35a.
Along with the starting input shaft gear 41b that forms a pair with the gear 41a,
Pairs of gears 42a and 35a, 41a and 4
1b is always engaged. Here, the actuator 24 for the fifth speed is EC
It is electrically connected to U19 and controls ECU19.
Through the 5-speed synchro clutch 38,
5th speed gear 35a is connected to input shaft 14 or
Let go. Further, the starting actuator 43 is connected to the ECU 19.
Are electrically connected to each other, and under the control of the ECU 19,
Via the starting clutch 44, the starting rotating shaft gear 41a
Is connected to or separated from the rotating shaft 12a. Also,
The drive actuator 45 is electrically connected to the ECU 19
The driving clutch is controlled by the ECU 19.
46, the drive rotary shaft gear 42a is connected to the rotary shaft 12a.
Connect or disconnect from Thereby, the rotating shaft 1
2a, input shaft 14 or output shaft 15, or rotation
The shaft 12a is connected to the input shaft 14 and the output shaft 15
Are separated. That is, driven by the driving clutch 46
When the rotary shaft gear 42a is connected to the rotary shaft 12a, the motor
The driving force of the motor 12 is, in turn, the rotating shaft 12a, the driving rotating shaft.
Gear 42a, input-side forward fifth speed gear 35a, output-side forward 5
To the drive shafts 13, 13 via the speed gear 35b and the output shaft 15.
Is transmitted. At this time, the 5-speed synchro clutch 38
The input-side forward fifth speed gear 35a is connected to the input shaft 14.
And the driving force of the motor 12 is
It is transmitted to the force shaft 14. Also, for example, when the vehicle is stopped
When the internal combustion engine 11 is started, the starting clutch 44
Connects the starting rotary shaft gear 41a to the rotary shaft 12a.
Then, the driving force of the motor 12 is sequentially changed to the rotation axis 12a.
Via the moving rotary shaft gear 41a and the starting input shaft gear 41b.
And transmitted to the input shaft 14. The ECU 19 receives, for example, an input from a driver.
Actuating according to the shift operation and the driving condition of the host vehicle.
, 24, 43, 45 by driving
The transmission operation of the transmission 17 and the motor driving force transmission unit 1
8 is controlled. For example, as described later, the ECU 1
9 indicates that the internal combustion engine 11 is stopped and the main clutch 16
The internal combustion engine 11 and the transmission 17 are further separated.
The EV in which the own vehicle is driven by the motor 12
During traveling, the speed (vehicle speed) V of the own vehicle and the rotation of the input shaft 14
Based on the rotation speed (input shaft rotation speed) NI, the transmission 17
Gear shifting operation and the operation of the motor driving force transmission unit 18
I do. For this reason, the ECU 19 includes, for example, the drive shaft 13.
Speed sensor 47 for detecting the vehicle speed V based on the rotational speed of the vehicle
And the input shaft speed NI of the input shaft 14
And the signal output from the rotation speed sensor 48 for detecting
It is empowered. For example, an internal combustion engine is operated by the main clutch 16.
11 and the transmission 17 are separated and input by the transmission 17
During EV traveling with the shaft 14 and the output shaft 15 separated
Is connected to the driving rotary shaft gear 4 via the driving clutch 46.
2a is connected to the rotating shaft 12a, so that the rotating shaft 12a
And the output shaft 15 are connected, and the driving force of the motor 12 is driven.
It is transmitted to the wheels W, W. Here, the ECU 19
The input shaft 14 via the forward first to fifth speed gear pairs 31,.
Of input shaft when NI is connected to output shaft 15
Is the lower limit rotational speed for starting the internal combustion engine 11.
Minimum rotational speed that is equal to or higher than the predetermined startable rotational speed #NS
So that the first to fifth gear pairs 31,..., 35
One of the input shaft 14 and the output shaft 15
And connect. In this case, each forward first to fifth gear pair 31,
, 35 are, for example, as shown in FIG.
Input vehicle speed V set for gear pairs 31, ..., 35
The selection is made based on the relationship with the shaft rotation speed NI. For example,
The ECU 19 determines that the vehicle speed V is lower than the predetermined speed V1 (first speed region).
In the case of, the first forward gear pair 31 is selected, and the vehicle speed V is the predetermined speed.
In the case of not less than the degree V1 and less than the predetermined speed V2 (second speed region)
The second forward speed gear pair 32 is selected, and the vehicle speed V is equal to or less than the predetermined speed V2.
When the speed is higher than the predetermined speed V3 (third speed range), the forward third speed
The gear pair 33 is selected, and the vehicle speed V is equal to or higher than the predetermined speed V3.
When the speed is lower than the constant speed V4 (fourth speed region), the forward fourth speed gear pair 3
4 is selected and the vehicle speed V is equal to or higher than the predetermined speed V4 (5th speed range)
When the speed is equal to or lower than the predetermined upper limit speed V5, the pair of forward fifth speed gears 35
Select The predetermined speeds V1,..., V4 are
Input shaft when the second to fifth speed gear pairs 32, ..., 35 are selected
When the rotation speed NI reaches a predetermined startable rotation speed #NS
The vehicle speed is V, and V1 ≦ V2 ≦ V3 ≦ V4. Also,
The predetermined upper limit speed V5 (for example, V5 ≧ V4) is not
At the time of EV traveling in which the vehicle is driven by only the motor 12
Is the upper limit speed that can be reached. The power transmission mechanism 10 according to the present embodiment is
Next, the operation of the power transmission mechanism 10 will be described.
Operation, in particular, starting the internal combustion engine 11 while the vehicle is running
The operation to be performed will be described with reference to the accompanying drawings.
FIG. 3 shows the operation of the power transmission mechanism 10, in particular, while the own vehicle is running.
Showing a process for starting the internal combustion engine 11 in the first embodiment.
It is a chart. First, in step S01 shown in FIG.
Means that the internal combustion engine 11 is stopped and the main clutch 16
With the internal combustion engine 11 and the transmission 17 separated,
EV running in which the own vehicle is driven by the motor 12
It is determined whether or not the mode is set. If the result of this determination is “NO”,
In this case, the process proceeds to step S02, and the traveling state at this time is
Continuously, a series of processing ends. On the other hand,
Is "YES", the process proceeds to step S03. In step S03, the vehicle speed V is
It is determined whether or not the speed is lower than V1. This determination result is "N
If "O", the process proceeds to step S05. On the other hand,
When the fixed result is "YES", that is, in the first speed range
Proceeds to step S04 to select the first forward gear pair 31.
And the input shaft 14 and the output shaft 15 are connected. And
The process proceeds to step S13 described below. In step S05, the vehicle speed V is
It is determined whether or not the speed is lower than V2. This determination result is "N
In the case of "O", the process proceeds to step S07. On the other hand,
When the fixed result is “YES”, that is, when the vehicle speed V is equal to the predetermined speed V
In the case of the second speed range of 1 or more and less than the predetermined speed V2
Proceeds to step S06 and selects the forward second speed gear pair 32
Then, the input shaft 14 and the output shaft 15 are connected. And later
The process proceeds to step S13 described below. In step S07, the vehicle speed V is
It is determined whether or not the speed is lower than V3. This determination result is "N
In the case of "O", the process proceeds to step S09. On the other hand,
When the fixed result is “YES”, that is, when the vehicle speed V is equal to the predetermined speed V
In the case of the third speed range of 2 or more and less than the predetermined speed V3
Proceeds to step S08 and selects the third forward speed gear pair 33
Then, the input shaft 14 and the output shaft 15 are connected. And later
The process proceeds to step S13 described below. In step S09, the vehicle speed V is
It is determined whether or not the speed is lower than V4. This determination result is "N
If “O”, the process proceeds to step S11. On the other hand,
When the fixed result is “YES”, that is, when the vehicle speed V is equal to the predetermined speed V
In the case of the fourth speed range of 3 or more and less than the predetermined speed V4
Proceeds to step S10 and selects the forward fourth speed gear pair 34
Then, the input shaft 14 and the output shaft 15 are connected. And later
The process proceeds to step S13 described below. In step S11, the vehicle speed V is
A predetermined speed that is equal to or higher than V4 and can be reached in the EV traveling mode
It is determined that it is in the 5th speed region below the upper limit speed V5, and
Proceed to step S12, select the forward fifth gear pair 35, and
14 and the output shaft 15 are connected. Then, step S1
Proceed to 3. In step S13, for example, the driver
Output related to accelerator pedal depressing operation etc.
Is less than or equal to a predetermined output limit value at which the motor 12 can output.
Is determined. If the result of this determination is "NO",
The process proceeds to step S15 described below. On the other hand,
If “YES”, the process proceeds to step S14, where the motor
Battery (not shown) that supplies power to the battery 12
SOC (State of charge) is out of the immediate power generation request area
Is determined. Determination result in step S14
Is "YES", for example, the remaining battery charge SOC
Are sufficiently charged to not require immediate generation
In this case, the process proceeds to step S02 described above. On the other hand,
If the determination result in step S14 is “NO”, for example,
Since the remaining SOC of the battery is decreasing,
If it is necessary to charge the battery, step S15
Proceed to. That is, in the EV driving mode, for example,
If a sudden load increase such as sudden acceleration is required,
If the state of charge SOC of the battery falls below a predetermined value,
If so, the process proceeds to step S15. In step S15
Drives the clutch actuator 21 and
The internal combustion engine 11 and the transmission 17 are connected via the latch 16
As a result, the internal combustion engine 11 is rotated at a predetermined startable speed.
Start at number #NS or more. Then, step S16
In this case, the driving force of the internal combustion engine 11 is transmitted to the drive wheels W, W.
The vehicle moves to the ENG drive mode
Then, a series of processing ends. For example, in the EV running mode,
If the vehicle speed V decreases when the pair 35 is selected,
Becomes the 4th speed region below the constant speed V4 and above the predetermined speed V3
In the forward fifth speed gear pair 35, the input shaft rotational speed NI
When the rotational speed becomes less than the predetermined startable rotational speed #NS, the internal combustion engine 11
Cannot be started. Therefore, the input shaft rotation
Forward when the number of revolutions NI is equal to or greater than a predetermined startable rotational speed #NS
The fourth speed gear pair 34 is selected, and the input shaft 14 and the output shaft 15
Is connected. As a result, the internal combustion engine 11 is started.
When a request occurs, simply actuate the clutch actuator.
And drives the internal combustion engine via the main clutch 16.
The internal combustion engine 11 is connected only by connecting the engine 11 and the transmission 17.
Can be started. As described above, the power according to the present embodiment
According to the transmission mechanism 10, in the EV traveling mode, the reserve
Therefore, it is in the standby state where the execution of the shifting operation is completed,
When a start request for the internal combustion engine 11 is issued,
Next, the clutch actuator 21 is driven to
The internal combustion engine 11 and the transmission 17 are connected via the latch 16
Then, the internal combustion engine 11 can be started. This
As a result, for example, whether a start request for the internal
Any of the forward first to fifth gear pairs 31, ..., 35
After selecting one and performing the shifting operation,
Compared to driving the heater 21
The engine 11 can be started. In the present embodiment, the internal combustion engine 1
1 is stopped and the internal clutch 11
When the transmission and the transmission 17 are separated from each other,
EV drive mode driven by drive 12
Therefore, the driving force of the motor 12 is
Therefore, the internal combustion engine 11 is started, but is not limited to this.
Not due to the inertia of the running vehicle
The engine 11 may be started. In this case, set in advance
Transmitted from the drive wheels W, W at the set gear ratio
The internal combustion engine 11 is started by force. In this embodiment, the starting rotation
An example including a shaft gear 41a and a starting input shaft gear 41b
For example, when starting the internal combustion engine 11 while the vehicle is stopped, the motor
The driving force of the motor 12 is transmitted to the starting rotary shaft gear 41a and the starting rotary shaft gear 41a.
When transmitted to the input shaft 14 via the input shaft gear 41b for movement
However, the present invention is not limited to this.
To start the internal combustion engine 11 with the clutch 17
May be provided. In this embodiment, the starting rotation
Connecting or disconnecting the shaft gear 41a with the rotating shaft 12a
Starting clutch 44 and driving rotary shaft gear 42a
A driving class connected to or separated from the rotating shaft 12a.
The switch 46 is provided, but is not limited thereto. For example,
Starting rotary shaft gear 41a and driving rotary shaft gear 42a
Is selectively connected to the rotating shaft 12a.
Or, the starting rotary shaft gear 41a and the driving rotary shaft gear
42a is separated from the rotating shaft 12a.
A moving clutch may be provided. Further, in this embodiment, the transmission 17
Are controlled by the ECU 19 by the actuators 22, 23, 2
4 in which the shift operation is controlled by driving
It is said that it is a transmission type, but it is not limited to this
For example, transmissions such as automatic stepped transmissions and continuously variable transmissions.
You may. For example, in the case of an automatic stepped transmission, the input shaft 1
4 and a clutch for shifting provided on the output shaft 15
, The input shaft speed NI becomes a predetermined startable speed #
Set to be NS or more. Also, for example, a metal bell
Drive force from the driving pulley to the driven pulley
If it is a continuously variable transmission, adjust the groove width of each pulley.
The input shaft speed NI is equal to or less than a predetermined startable speed #NS.
Set to be on top. As described above, according to the first aspect of the present invention,
According to the power transmission mechanism of the present invention, the internal combustion engine is stopped,
The state in which the internal combustion engine and the transmission are separated by the connection separation means
The driving mode in which the driving wheels are driven by the motor
A start request is issued to the internal combustion engine
Simply connect the internal combustion engine and the transmission via the connection and disconnection means.
Just start the internal combustion engine immediately.
it can. As a result, for example, a request for starting the internal combustion engine is generated.
And then set the gear ratio according to the speed of the host vehicle.
Connection separating means after performing a shift operation corresponding to the speed ratio
Starts the internal combustion engine more quickly than when
Can be done.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a configuration diagram of a power transmission mechanism according to an embodiment of the present invention. FIG. 2 is a graph showing a relationship between a vehicle speed (vehicle speed) V and an input shaft rotation speed. FIG. 3 is a flowchart showing an operation of the power transmission mechanism shown in FIG. 1, particularly a process of starting an internal combustion engine while the host vehicle is running. FIG. 4 is a configuration diagram of a power transmission mechanism according to an example of the related art. FIG. 5 shows an operation of a power transmission mechanism according to an example of the related art;
Particularly, it is a flowchart showing a process for starting the internal combustion engine in the EV running mode. DESCRIPTION OF SYMBOLS 10 Power transmission mechanism 11 Internal combustion engine 12 Motor 12a Rotary shaft 14 Input shaft 15 Output shaft 16 Main clutch (connection and disconnection means) 17 Transmission 18 Motor drive power transmission section (drive power transmission means) 35b Output side forward Fifth speed gear (output shaft rotation power transmission member) 42a Drive rotation shaft gear (rotation shaft rotation power transmission member) Steps S03 to S12 Shift control means Step S15 Internal combustion engine start control means

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat ゛ (Reference) F02D 29/02 ZHV F02N 11/04 D F02N 11/04 11/08 V 11/08 F16H 61/02 F16H 61 / 02 B60K 9/00 E (72) Inventor Kazuaki Takizawa 1-4-1, Chuo, Wako-shi, Saitama F-term in Honda R & D Co., Ltd. (Reference) 3D041 AA28 AB00 AC15 AD51 AE14 AE31 3G093 AA05 AA07 AA16 CA01 DB05 EB01 EC01 EC02 FA11 3J552 MA04 MA13 NA01 NB08 PA26 RC01 SB02 UA03 UA07 VA32W VB01W

Claims (1)

Claims 1. A power transmission mechanism for connecting at least one of an internal combustion engine and a motor to a driving wheel of a host vehicle and transmitting a driving force to the driving wheel. An input shaft connected to the drive wheel, and an output shaft connected to the drive wheel, wherein the input shaft and the output shaft are connected so that a gear ratio can be changed, and the driving force of the internal combustion engine is transmitted to the drive wheel. A transmission, a connection / separation unit provided between the internal combustion engine and the transmission, for connecting or disconnecting the internal combustion engine and the transmission, and a rotary shaft rotation power transmission provided on a rotary shaft of the motor. A driving force transmitting unit that connects a member and an output shaft rotation power transmitting member provided on the output shaft, and that can transmit the driving force of the motor to the driving wheels; Machine is separated from the front In a state in which the driving force of the motor is transmitted to the driving wheels by the driving force transmission means, the rotational speed of the input shaft when the input shaft and the output shaft are connected by the transmission changes the internal combustion engine. Speed change control means for setting the speed ratio according to the speed of the host vehicle so as to be equal to or higher than a predetermined startable speed, and connecting the input shaft and the output shaft by the transmission; When the internal combustion engine and the transmission are separated from each other, and when the driving force of the motor is transmitted to the drive wheels by the driving force transmission means, a request for starting the internal combustion engine is generated. Wherein the input shaft connected to the output shaft by the shift control means, and an internal combustion engine start control means for starting the internal combustion engine by connecting the internal combustion engine by the connection separation means. Power transmission mechanism.