JP3232171B2 - Automatic transmission - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an automatic transmission.

[0002]

2. Description of the Related Art Conventionally, in an automatic transmission, a P (parking) range, an R (reverse) range, an N (neutral) range, a D (drive) range, and an S (second) range.
A range and an L (low) range are formed, and a shift is automatically performed by selecting each range. The driver moves the shift lever to a range position of an I pattern arranged in an “I” shape. Each range is selected by.

[0003] However, in the automatic transmission, it is not possible to manually select the gear position manually, and the shift feeling is lacking. Therefore, in addition to the range position of the I pattern, a shift position of an H pattern arranged in a so-called "H" shape similar to that of the manual shift is provided, and the traveling in the automatic transmission mode and the traveling in the manual transmission mode are selected. Is provided (Japanese Unexamined Patent Publication No.
-199758).

[0004] In this type of automatic transmission, the shift lever can be moved to each shift position by passing between shift positions of the H pattern, that is, an intermediate position. Further, when the shift lever is placed at the intermediate position for longer than the set time, the mode is switched from the manual shift mode to the automatic shift mode.

[0005]

However, in the conventional automatic transmission, if the set time is made longer than necessary, the time required to switch from the manual shift mode to the automatic shift mode becomes longer, and the Gives a sense of incongruity. In addition, if the set time is shortened, when the shift lever is moved from one shift position to another shift position, the shift lever may be switched to the automatic shift mode slightly while passing through the intermediate position. is there.

The present invention solves the above-mentioned problems of the conventional automatic transmission, shortens the time required for switching from the manual shift mode to the automatic shift mode, and shifts the shift lever from a certain shift position to another shift position. It is an object of the present invention to provide an automatic transmission that does not switch to the automatic transmission mode in a short time when the shift lever passes through the intermediate position when the automatic transmission is moved to the first shift position.

[0007]

For this purpose, in the automatic transmission according to the present invention, there is provided an automatic transmission mode for shifting to a selected gear in accordance with a running state of a vehicle, and a transmission selected by a shift operation. It is possible to set a manual shift mode in which gears are shifted to the first gear. The first and second portions extend in parallel with each other, and the third portion connects between the first and second portions. One end and the other end of the first and second portions include A predetermined shift speed is set, a shift path of an H pattern in which the automatic shift mode is set at an intermediate position of the third portion, and a range that is moved along the shift path and is in the automatic shift mode.
A shift lever for selecting a shift speed in the manual shift mode, a first switch for detecting whether the shift lever is located at one of the one end and the other end of the third portion, and A second switch for detecting whether the shift lever is positioned at one of the one end and the other end of the first and second portions, and a switch corresponding to a range and a shift speed selected by the shift lever. A control device for performing a shift determination and generating a shift output;
And a hydraulic circuit for achieving each shift speed corresponding to the shift output of the control device.

Further, in the control device, in the manual shift mode, the first and second switches are each such that the shift lever is positioned at one of one end or the other end of the first to third portions. While detecting that the first and second
In the manual shift mode, the first and second switches are each provided with a shift lever having the first to third portions. While detecting that it is not located at any one of the one end and the other end, the automatic shift mode return timer is timed, and when the time counted exceeds the set value, the automatic shift mode is returned. Automatic shift mode return means is provided.

[0009]

According to the present invention, as described above, in the automatic transmission, the automatic transmission is selected by the automatic shift mode in which the gear is shifted to the selected gear in accordance with the running state of the vehicle, and the shift operation. The manual shift mode in which the gear is shifted to the changed gear stage can be set. The first and second portions extend in parallel with each other, and the third portion connects between the first and second portions. One end and the other end of the first and second portions include A predetermined shift speed is set, a shift path of an H pattern in which the automatic shift mode is set at an intermediate position of the third portion, and a range that is moved along the shift path and is in the automatic shift mode.
A shift lever for selecting a shift speed in the manual shift mode, a first switch for detecting whether the shift lever is located at one of the one end and the other end of the third portion, and A second switch for detecting whether the shift lever is positioned at one of the one end and the other end of the first and second portions, and a switch corresponding to a range and a shift speed selected by the shift lever. A control device for performing a shift determination and generating a shift output;
And a hydraulic circuit for achieving each shift speed corresponding to the shift output of the control device.

Further, in the control device, in the manual shift mode, the first and second switches are each such that the shift lever is located at one of the one end or the other end of the first to third portions. While detecting that the first and second
In the manual shift mode, the first and second switches are each provided with a shift lever having the first to third portions. While detecting that it is not located at one of the one end or the other end, the automatic shift mode return timer is timed, and the automatic shift mode is returned to the automatic shift mode when the measured time exceeds a set value. A shift mode return means is provided.

To select a gear in the manual shift mode, the shift lever is moved along the third portion to operate the first switch, and then is moved along the first and second portions. Activate the second switch. The gear position setting means of the control device, in the manual shift mode,
While the first and second switches both detect that the shift lever is located at one of the one end or the other end of the first to third portions, the first and second switches may be used. The shift speed is set in accordance with the combination of the switch signals. Therefore, the gear position corresponding to the shift position of the shift lever can be set. Further, the automatic transmission mode returning means of the control device may be configured such that, in the manual transmission mode, the first and second switches are each operated by a shift lever having a first to a first position.
While detecting that it is not located at one of the one end or the other end of the third portion, the automatic shift mode return timer is timed, and when the counted time exceeds the set value, Return to shift mode. Therefore, by shifting the shift lever to the intermediate position, it is possible to return from the manual shift mode to the automatic shift mode.

Further, even when the second switch is not operated, when the first switch is operated, the timer for returning to the automatic transmission mode is not timed. Therefore, the time measured by the automatic shift mode return timer is shortened, and the set value can be reduced corresponding to the time. As a result, it is possible to determine in a short time whether or not the driver is switching from the manual shift mode to the automatic shift mode, so that the time required for switching from the manual shift mode to the automatic shift mode can be reduced. Therefore, the driver does not feel uncomfortable.

Further, when the shift lever is moved from one shift position to another shift position, the shift lever is not switched to the automatic transmission mode in a short time when the shift lever passes the intermediate position.

[0014]

Embodiments of the present invention will be described below in detail with reference to the drawings. FIG. 1 is a conceptual block diagram of an automatic transmission showing an embodiment of the present invention. In the figure, reference numeral 71 denotes a shift lever for selecting a range in the automatic shift mode and a shift speed in the manual shift mode, and SW1 a first switch for detecting that the shift lever 71 has been moved by a set amount in the first direction. , SW2 is a second switch for detecting that the shift lever 71 has been moved by a set amount in a second direction, and 31 is a shift switch for the shift lever 71.
A control device for making a shift determination in accordance with the range and the shift speed selected by the user and generating a shift output, 72
Is a hydraulic circuit that achieves each shift speed in accordance with the shift output of the control device 31.

To select a gear in the manual shift mode, the shift lever 71 is moved in a first direction by a set amount to activate a first switch SW1, and then is moved in a second direction by a set amount. To activate the second switch SW2. The control device 31 is configured to set each shift speed when at least one of the first and second switches SW1 and SW2 detects the movement of the set amount of the shift lever 71 in the manual shift mode. Means 73
Therefore, the gear position corresponding to the shift position of the shift lever 71 is set. When the shift lever 71 is moved to the intermediate position, the mode can be returned from the manual shift mode to the automatic shift mode.

The control device 31 controls the first and second switches SW1 and SW in the manual shift mode.
2 when the shift lever 71 does not detect the movement of the set amount, the automatic shift mode return timer (not shown) is timed, and the automatic shift mode is returned to when the measured time exceeds the set value. Since the return means 74 is provided, even when the second switch SW2 is not operated, the automatic shift mode return timer is not timed while the first switch SW1 is operated.

Therefore, the time measured by the timer for returning to the automatic transmission mode is shortened, so that the set value can be reduced corresponding to the time. As a result, it is possible to determine in a short time whether or not the driver is switching from the manual shift mode to the automatic shift mode, so that the time required for switching from the manual shift mode to the automatic shift mode can be reduced. It is possible to prevent the driver from feeling uncomfortable.

Further, when the shift lever 71 is moved from one shift position to another shift position, the shift lever 71 does not switch to the automatic shift mode in a short time when the shift lever 71 passes the intermediate position. . FIG.
FIG. 3 is a schematic view of an automatic transmission showing an embodiment of the present invention, and FIG. 3 is a view showing the operation of the automatic transmission in the embodiment of the present invention.

In FIG. 2, the automatic transmission is a fluid transmission 1 such as a transmission 10 and a torque converter.
The rotation generated by an engine (not shown) is transmitted to a transmission 10 via a fluid transmission device 11, the transmission 10 performs a speed change, and transmits it to drive wheels (not shown). The fluid transmission device 11 includes a pump impeller 12, a turbine runner 13, and a stator 14, and has a lock-up clutch 15 for improving power transmission efficiency. The rotation of the input member 16 controls the rotation of the oil in the fluid transmission device 11. Power is transmitted to the input shaft 17 of the transmission 10 indirectly by flow or directly by locking up the lock-up clutch 15.

The transmission 10 comprises an auxiliary transmission unit 18 and a main transmission unit 19. The auxiliary transmission unit 18 has an overdrive planetary gear unit 20, and the main transmission unit 19 has a front planetary gear unit 21 and a rear planetary gear unit 22. Here, the overdrive planetary gear unit 20 is connected to the input shaft 17 and supports the planetary pinion P ₁ , the carrier CR ₁ , the sun gear S ₁ surrounding the input shaft 17, and the input shaft 23 of the main transmission unit 19.
Consisting ring gear R ₁ connected with. Between the carrier CR ₁ and the sun gear S _1, together with the third clutch C0 and third one-way clutch F0 are provided, the fourth brake B0 is disposed between the sun gear S ₁ and the case 24 .

Next, the front planetary gear unit 2
1 is connected to the output shaft 25 and the planetary pinion P_TwoTo
Supporting carrier CR_Two, Surrounding the output shaft 25
The sun gear S of the rear planetary gear unit 22_ThreeAnd one
Sun gear S formed physically _Two, And the first clutch C1
Ring gear R connected to input shaft 23 through_TwoConsisting of
You. The input shaft 23 and the sun gear S_TwoBetween the 2nd class
Switch C2 is a sun gear S_TwoAnd a band between the case 24
A first brake B1 including a brake is provided. Further
And sun gear S_TwoBetween the first case and the case 24.
A second brake B2 is provided via an clutch F1.
You.

Then, the rear planetary gear unit 22
The carrier CR ₃ supporting a planetary pinion P ₃ is,
It comprises a sun gear S ₃ and a ring gear R ₃ directly connected to the output shaft 25, and a third brake B 3 and a second one-way clutch F 2 are arranged in parallel between the carrier CR ₃ and the case 24. 43 is an input speed sensor, SP
Reference numerals 1 and SP2 denote vehicle speed sensors.

The first solenoid valve S of the automatic transmission
1, second solenoid valve S2, third solenoid valve S3, first clutch C1, second clutch C2, third clutch C0, first brake B1, second brake B2, third
The brake B3 and the fourth brake B0 are controlled as shown in the operation table of FIG. 3 in each of the shift speeds of the D range, the S range, and the L range.

That is, at the first speed (1ST) in the D range or the S range, the first solenoid valve S
1 is in the ON state, and as a result, the first clutch C1 and the third clutch C0 are engaged, and the second one-way clutch F2 and the third one-way clutch F0 are locked.
Therefore, the overdrive planetary gear unit 2
0 are directly connected to each other via the third clutch C0 and the third one-way clutch F0, and the rotation of the input shaft 17 remains unchanged.
3 is transmitted.

Further, in the main transmission unit 19, rotation of the input shaft 23 through the first clutch C1 is transmitted to the ring gear R ₂ of the front planetary gear unit 21, further carrier CR ₂ and the carrier CR ₂ integral output It is transmitted to the shaft 25. At this time, the sun gears S ₂ and S ₃
Through the carrier C of the rear planetary gear unit 22
Although a rotational force in the left direction is applied to R ₃ , the rotation of the carrier CR ₃ is prevented by the lock of the second one-way clutch F 2, so that the planetary pinion P ₃ rotates by itself and the ring gear R ₃ integrated with the output shaft 25. To transmit power.

At the second speed (2ND) in the D range, the first solenoid valve S1 and the second solenoid valve S2 are turned on. Thus, the first clutch C1, the third clutch C0, and the second brake B2 are engaged, and the first one-way clutch F1 and the third one-way clutch F0 are locked. Therefore, the overdrive planetary gear unit 20 is maintained in the directly connected state, and the rotation of the input shaft 17 is transmitted to the input shaft 23 of the main transmission unit 19 as it is. In the main transmission unit 19, the rotation of the input shaft 23 is transmitted to the front planetary gear unit 2 via the first clutch C1.
Is transmitted to the first ring gear R ₂ and the planetary pinion P
Imparts a rotational force of the left direction to the sun gear S ₂ via the _2, the sun gear S ₂ is rotation is prevented by the locking of the first one-way clutch F1 due to engagement of the second brake B2. Therefore, the carrier CR ₂ rotates while rotating the planetary pinion P _2, and the rotation of the output shaft 2 via the second planetary gear unit 21 alone.
5 is transmitted.

At the third speed (3RD) in the D range and the S range, the first solenoid valve S1 is turned off, and the first clutch C1 and the second clutch C
2. The third clutch C0 and the second brake B2 are engaged, and the third one-way clutch F0 is locked. Accordingly, the overdrive planetary gear unit 20 is maintained in the directly connected state, and the main transmission unit 19 is integrated with the front planetary gear unit 21 by the engagement of the first clutch C1 and the second clutch C2. The rotation of 23 is transmitted to output shaft 25 as it is.

Then, the fourth speed (4TH) in the D range
That is, at the highest speed, the second solenoid valve S
2 is also off, and the first clutch C1, the second clutch C2, the second brake B2, and the fourth brake B0 are engaged. The main transmission unit 19 is in a directly connected state as in the case of the third speed, but the overdrive planetary gear unit 20
Is switched so that the third clutch C0 is released and the fourth brake B0 is engaged. Therefore, the sun gear S ₁ is locked by the engagement of the fourth brake B 0, the planetary pinion P ₁ rotates while transmitting the power to the ring gear R ₁ while rotating the carrier CR ₁ , and the main transmission unit 19 in the directly connected state is rotated. The rotation of the overdrive is transmitted to the input shaft 23.

On the other hand, during a downshift, the third clutch C0 is engaged and the fourth brake B0 is released in the case of the 4-3 shift, and the second clutch C2 is released in the case of the 3-2 shift. Then, in the case of the 2-1 shift, the second brake B2 is released. The first and third speeds in the S range are the same as those in the first and third speeds in the D range. At the second speed in the S range, in addition to the engagement of the first clutch C1, the third clutch C0, and the second brake B2, the third solenoid valve S
3 and first brake B1 is engaged in the ON state, it locks the sun gear S ₂ of the main transmission unit 19, to engine braking.

The second speed in the L range is the same as that in the second speed in the S range described above.
When fast addition to engagement of the first clutch C1 and the third clutch C0, third brake B3 and the third solenoid valve S3 is turned on is engaged to lock the carrier CR ₃ of the rear planetary gear unit 22, engine Apply the brakes.

The operation at the third speed and the fourth speed in the manual shift mode is the operation at the third speed and the fourth speed in the automatic shift mode, and the operation at the second speed in the manual shift mode is the S range in the automatic shift mode. The operation at the second speed and the operation at the first speed in the manual shift mode are the same as the operations at the first speed in the L range in the automatic shift mode. Next, the control device 31 (FIG. 1) of the automatic transmission according to the present invention will be described.

FIG. 4 is a schematic diagram of an automatic transmission control device according to an embodiment of the present invention, FIG. 5 is an input side block diagram of the automatic transmission control device according to the embodiment of the present invention, and FIG. 6 is an embodiment of the present invention. It is an output side block diagram of a control device of an automatic transmission in an example. In the figure, reference numeral 31 denotes a control device (ECU) for controlling the entire automatic transmission, 32 denotes a CPU, and 33 denotes an RO.
M and 34 are RAMs, 35 is an input interface circuit, 3
Reference numeral 6 denotes an input processing circuit which is connected to the input interface circuit 35 and performs input processing of each signal. Reference numeral 37 denotes sensors which are connected to the input processing circuit 36 and output each signal. Reference numeral 38 denotes an output interface circuit, 39 denotes a drive circuit connected to the output interface circuit 38 and performs output processing of each signal, and 40 denotes an actuator connected to the drive circuit 39 and driven by the output signal. It is.

An input speed sensor 43 detects the speed of the third clutch C0 of the transmission 10 (FIG. 2). SP1 and SP2 denote vehicle speed sensors for detecting the speed of the output shaft 25 of the automatic transmission. The sensor SP1 is used as a backup when the vehicle speed sensor SP2 breaks down and as a speedometer. Reference numeral 44 denotes an automatic transmission mode (A /
In T), a shift position sensor 45 for detecting which range position of the I pattern is selected by the shift lever 71 (FIG. 1), and a shift position sensor 45 is provided below the shift lever 71, and in the manual shift mode (M / T). Shift lever 7
A shift position sensor 1 detects which shift position of the H pattern is selected. The shift position sensor 45 includes tilt detection switches LH and RH as a pair of first switches SW1 and rocking detection switches FR and RR as a pair of second switches SW2.

Reference numeral 46 denotes a throttle opening sensor which is provided on an engine (not shown), detects a throttle opening corresponding to the engine load by a potentiometer (not shown), and 47 denotes a brake pedal which is not shown.
Brake switch (SW) for detecting brake operation, 4
Reference numeral 8 denotes an idling (ID) disposed in the throttle opening sensor 46 for detecting that the throttle opening is fully closed.
L) A switch 49 is provided in an accelerator pedal (or throttle opening sensor 46) (not shown) to detect that the throttle opening is fully opened and a kick down is required (K / D). The switch 50 is an oil temperature sensor that is disposed on the transmission 10 and detects the oil temperature of the transmission 10.

Each of the sensors 37 is connected to a corresponding input processing circuit 36. S1 is a first solenoid valve for shifting, S2 is a second solenoid valve for shifting, S3 is a third solenoid valve for shifting,
Switching is performed in accordance with each gear by turning on / off each solenoid (not shown). SLU is a linear solenoid valve for lock-up (L-up),
SLN is a linear solenoid valve for controlling back pressure of an accumulator (not shown), and SLT is a linear solenoid valve for controlling line pressure. These first solenoid valve S1, second solenoid valve S2, third solenoid valve S3, linear solenoid valves SLU, SLN, SL
Between T and the output interface circuit 38, a solenoid drive circuit and a monitor circuit are connected. The solenoid drive circuit generates a voltage or a current for operating the first solenoid valve S1, the second solenoid valve S2, the third solenoid valve S3, and the linear solenoid valves SLU, SLN, and SLT. 1 solenoid valve S1, 2nd solenoid valve S2,
Third solenoid valve S3, linear solenoid valve S
The operation status of the LU, SLN, and SLT is checked, a failure is determined, and a self-diagnosis is performed.

Reference numeral 53 denotes an engine control device (EFI) for controlling the engine, and 54 outputs a signal for temporarily reducing the torque generated by the engine in order to reduce a shift shock during shifting. This is a torque reduction input / output processing circuit. Upon receiving a signal from the torque reduction input / output processing circuit 54, the engine control device 53 performs ignition timing delay, fuel cut, and the like. Also, 5
Reference numeral 5 denotes an engine speed input processing circuit for inputting the engine speed.

Reference numeral 56 denotes a D for outputting a self-diagnosis result by an O / D off indicator lamp (not shown) when the transmission 10 or the engine control unit 53 fails.
GCHECKER 57 is the DG CHECKER 56
A DG input / output processing circuit for outputting a self-diagnosis result to the
Reference numeral 58 denotes a display device such as a mode selection lamp and an O / D off indicator lamp (not shown) for displaying the state of the transmission 10, and 59 a display drive circuit for operating the display device 58.

Next, the control device 3 for the automatic transmission having the above configuration
1 will be described. FIG. 7 is a first main flowchart showing the operation of the automatic transmission according to the embodiment of the present invention, FIG. 8 is a second main flowchart showing the operation of the automatic transmission according to the embodiment of the present invention, and FIG. FIG. 1 is a diagram showing a shift pattern of an automatic transmission according to an embodiment;
0 is a diagram showing an operation table of the shift position sensor in the embodiment of the present invention. Step S1 When starting the program, initial settings are made for all conditions. Step S2 The rotation speed of the input shaft 17 and the output shaft 25 of the automatic transmission is calculated based on the signals from the input speed sensor 43 (FIG. 5) of the automatic transmission and the vehicle speed sensors SP1 and SP2. Step S3 Shift position sensor 4 of automatic transmission
4, the range position currently selected in the I pattern is detected. At the same time, a failure determination of the neutral start switch (N.S.S.W.) is performed. Step S4: The current throttle opening is calculated based on the signal from the throttle opening sensor 46. Step S5: The current oil temperature (ATF temperature) of the transmission 10 is calculated based on the signal from the oil temperature sensor 50. Step S6: Input signals of a pair of tilt detection switches LH and RH and a pair of rocking detection switches FR and RR provided as manual shift switches of the automatic transmission.
The shift position flags SF1 to SF4 are turned on / off according to the position of the shift lever 71 (FIG. 1).

In this case, as shown in FIG. 9, a pair of tilt detection switches LH and RH and a pair of
R and RR are provided, and the tilt detection switch LH detects that the shift lever 71 has been moved from the D range position to the left by a set amount in the figure, and the tilt detection switch RH has the shift lever 71. Is moved from the D range position to the right in the figure by the set amount.

Further, the swing detection switch FR is such that the shift lever 71 is moved from the D range position to the left or right in the figure by a set amount, and from that state, is further moved upward by a set amount in the figure. And the swing detection switch RR detects that the shift lever has been moved from the D range position to the left or right in the figure by the set amount, and from that state, has been further moved downward by the set amount in the figure. I do.

Reference numeral 61 denotes a shift path of the shift lever 71, P denotes a P range position, R denotes an R range position, N denotes an N range position, D denotes a D range position, and numerals 1 to 4 denote shift positions of the respective shift speeds. It is. Further, m _L is a left intermediate position where the tilt detection switch LH is turned on when the shift lever 71 is moved to the left in the figure by a set amount, and m _R is a shift amount of the shift lever 71 to the right in the figure. This is a right intermediate position where the tilt detection switch RH is turned on when the switch is turned on. The shift path 61 includes a first portion, a second portion, and a third portion connecting the first portion and the second portion, and a first speed and a second speed are provided at one end and the other end of the first portion. The gear stage of
The third speed and fourth speed are set at one end and the other end of the second portion, and the automatic shift mode is set at an intermediate position of the third portion.

The tilt detecting switches LH and RH and the swing detecting switches FR and RR operate as shown in the operation table of FIG. That is, P range position, R range position,
In the N range position and the D range position, the tilt detection switches LH, RH and the swing detection switches FR, RR
Are both turned off. Further, the tilt detection switch RH and the swing detection switch RR are turned on at the fourth speed shift position in the manual shift mode, and the tilt detection switch RH and the swing detection switch FR are turned on at the third speed shift position, In the second speed shift position, the tilt detection switch LH and the swing detection switch RR are turned on, and in the first speed shift position, the tilt detection switch LH is turned on.
And the swing detection switch FR is turned on.

In the transition of the shift operation, the D range control is performed when the automatic shift mode is switched to the manual shift mode, and the hold control is performed when the manual shift mode is switched to the automatic shift mode. In either case, one of the tilt detection switches LH and RH is turned on. Step S7 Shift position flags SF1 to SF4
It is determined whether any one of is turned on.
If it is on, the process proceeds to step S13, and if it is off, the process proceeds to step S8. Step S8: It is determined whether or not the manual shift mode flag is turned on. If it is on, the process proceeds to step S16, and if it is off, the process proceeds to step S9. Step S9 The automatic shift data D is read into the shift point data MSL of the shift diagram for the automatic shift mode. Step S10 Automatic shift data D is added to the lockup point data MSLP of the lockup diagram for the automatic shift mode.
Read. Step S11 Based on the automatic shift data D read in steps S9 and S10 and the various running conditions calculated previously, a shift determination and a lockup determination in the automatic shift mode are performed. Step S12 The timing determination of the shift determination and the lockup determination performed in step S11 is performed. Step S13: The manual shift mode flag is turned on to set the manual shift mode. Step S14: Reset the value of the automatic shift mode return timer (not shown). Step S15 Perform a manual shift map selection process, select a shift diagram and a lockup diagram for the manual shift mode, and select shift point data MSL and lockup point data MS.
The data for manual shifting is read into the LP. Step S16 automatic shift mode returning timer determines whether counting the time t has exceeded the set value t _1. The time t measured by the automatic shift mode return timer is the set value t _1.
To step S15 if not exceeded, if the time t the automatic shift mode returning timer has timed exceeds the set value t ₁ proceeds to step S17. Step S17: The manual shift mode flag is turned off, and the process proceeds to step S9 to return to the automatic shift mode. Step S18 A shift determination and a lockup determination in the manual shift mode are performed based on the manual shift data read in step S15 and the various running conditions calculated previously. Step S19 The timing determination of the shift determination and the lockup determination performed in step S18 is performed. Step S20: Whether or not to control the third solenoid valve S3 (FIG. 6) for effecting the engine brake according to the shift position detected by the signal from the shift position sensor 45, the speed corresponding to the output request, and the like. Make a judgment. Step S21 Steps S11, S12, S18 to S
According to the judgment at 20, a shift output or an engine brake output is generated, and the first solenoid valve S1, the second solenoid valve S2, and the third solenoid valve S3 are operated to start shifting or apply the engine brake. Step S22 At the time of shifting in the manual shifting mode, it is determined whether or not the line pressure is temporarily increased to reduce the time lag. Step S23 According to the determination in step S22,
The linear solenoid valve SLT for line pressure control is controlled. Step S24: It is determined whether to control the back pressure of the accumulator for the manual shift (not shown) or to control the back pressure of the accumulator for the automatic shift (not shown) in order to prevent the shift shock at the time of the shift shift. Control the back pressure of the accumulator. Step S25 Steps S11, S12, S18, S
The linear solenoid valves SLU, SLN, and SLT are controlled in accordance with the determinations in steps S19, S23, and S24, and the process returns to step S2.

By the way, in the manual shift mode, the shift lever 71 is moved to each shift position by passing through the middle position of the H pattern, but the shift lever 71 is moved to the left middle position longer than the set time. When placed between the m _L and the right middle position m _R, so that the switching from the manual shift mode to the automatic shift mode. Therefore, it is arranged an automatic shift mode returning timer, whether the automatic shift mode returning timer time t counted exceeds the set value t ₁ is determined.

The automatic shift mode return timer starts counting when the tilt detection switches LH and RH and the swing detection switches FR and RR are both turned off. For example, when the vehicle is traveling in the first speed of the manual shift mode and is to be switched to the automatic shift mode, the shift lever 71 is set to 1
It is necessary to move from the speed shift position to the D range position. In this case, once the shift lever 71 from the shift position of the first-speed to the left intermediate position m _L (temporarily) moved, it is moved to the D range position from the left side intermediate position m _L. When the shift lever 71 moves away from the first-gear shift position, the swing detection switch FR is turned off.
_The tilt detection switch LH is on until it moves to _L.
Subsequently, when the shift lever 71 moves away from the left intermediate position m _L, tilt detection switch LH is turned off, this time, the automatic shift mode returning timer starts counting.

As described above, the shift lever 71 is shifted to the first speed, the second speed,
When the shift position is between the shift position of the first speed and the left intermediate position m _L , and between the shift position of the third speed and the fourth speed and the right intermediate position m _R , the automatic shift mode return timer does not time, Each shift speed is maintained by performing the hold control. The automatic shift mode returning timer is timing when the shift lever 71 is located between the left intermediate position m _L and the right middle position m _R.

Therefore, the time t measured by the automatic shift mode return timer is shortened, so that the set value t ₁ can be reduced corresponding to the time t. As a result, it is possible to determine in a short time whether or not the driver is switching from the manual shift mode to the automatic shift mode, so that the time required for switching from the manual shift mode to the automatic shift mode can be reduced. It is possible to prevent the driver from feeling uncomfortable.

Further, when the shift lever 71 is moved from one shift position to another shift position, the shift lever 71 does not switch to the automatic shift mode for a short time when passing through the intermediate position. . Further, at the time of shifting operation, the tilt detection switches LH, LH are turned off after the swing detection switches FR, RR are turned off.
The time Δt ₁ until the RH is turned off is measured, and the time Δt ₁ is measured.
by t _1, it is possible to estimate the operating speed of the shift lever 71 by the driver to set the setpoint t ₁ in correspondence to the operation speed.

Therefore, for a driver who operates the shift lever 71 quickly, the set value t ₁ is reduced to shorten the set time, and for a driver who operates the shift lever 71 slowly, the set value t ₁ is increased. The setting time can be extended. Next, a subroutine of the manual shift SW input process in step S6 of FIG. 7 will be described.

FIG. 11 is a first flowchart of the manual shift SW input process in the embodiment of the present invention, and FIG. 12 is a second flowchart of the manual shift SW input process in the embodiment of the present invention. Step S6-1: An operation of switching the gear position in the manual shift mode or switching from the manual shift mode to the automatic shift mode (hereinafter, referred to as a "shift canceling operation").
It is determined whether or not has been started. In this case, it is determined whether or not the swing detection switches FR and RR (FIG. 9) are turned off. If it has been started, the process proceeds to step S6-2, and if it has not been started, the process proceeds to step S6-3. Step S6-2: A counter (not shown) for measuring the time Δt ₁ is reset, and the process proceeds to step S6-19. Step S6-3: It is determined whether or not the shift release operation has been completed. In this case, the tilt detection switches LH, RH
Is determined by whether or not is turned off. If the shift elimination operation has been completed, the process proceeds to step S6-4, and if not completed, the process proceeds to step S6-10. Step S6-4: The counting of the counter is completed, and the time Δt ₁ is read. Step S6-5: Multiply the time Δt ₁ by a predetermined coefficient K,
To determine the set value t ₁ of the automatic shift mode returning timer. Step S6-6 set value t ₁ is determined whether the lower limit value t _1min smaller. If the set value t ₁ is the lower limit value t _1min smaller than the step S6-7, the set value t ₁ is the lower limit value t
If it is longer than _{1 min} , the process proceeds to step S6-8. Step S6-7 set value t ₁ and the lower limit value t _1min. Step S6-8 set value t ₁ determines whether larger than the upper limit t _1max. If the set value t ₁ is greater than the upper limit t _1max in step S6-9, the set value t ₁ is the upper limit value t
If it is equal to or _smaller than 1max, the process proceeds to step S6-20. Step S6-9 set value t ₁ and the upper limit value t _1max. Steps S6-10, S6-11 4 in manual shift mode
The speed is selected, and it is determined whether or not the tilt detection switch RH and the swing detection switch RR are turned on. When the speed is turned on, the shift position flag SF4 is turned on to set the fourth speed. Steps S6-12, S6-13 Manual shift mode 3
The speed is selected, and it is determined whether or not the tilt detection switch RH and the swing detection switch FR are on. If the speed is on, the shift position flag SF3 is turned on to set the third speed. Steps S6-14, S6-15 Manual shift mode 2
The speed is selected, and it is determined whether or not the tilt detection switch LH and the swing detection switch RR are turned on. If the speed is turned on, the shift position flag SF2 is turned on to set the second speed. Steps S6-16, S6-17 Manual shift mode 1
The speed is selected, and it is determined whether or not the tilt detection switch LH and the swing detection switch FR are turned on. If the speed is turned on, the shift position flag SF1 is turned on to set the first speed. Steps S6-18, S6-19 Shift lever 71
(Figure 1) is the first speed, second speed shift position and leftward intermediate position m _L
There between, third speed, be between fourth speed shift position and the right middle position m _R, it is determined whether tilt detection switch LH, only one of RH is on, on the If it is, it is considered as a shift operation transient state,
If the D range of the automatic shift mode was selected before the determination, the shift speed set in the D range was held and the automatic shift was prohibited, and the shift speed with the manual shift mode was selected before the determination. In this case, the shift position flags SF1 to SF4 are held in step S18 in FIG. 7, and the current gear position is held as it is. Step S6-20 If none of the above conditions applies, the shift position flags SF1 to SF4 are turned off.

In this manner, it is possible to determine in a short time whether or not the driver is switching from the manual shift mode to the automatic shift mode, so that the time required for switching from the manual shift mode to the automatic shift mode is determined. Can be shortened, and the driver does not feel uncomfortable. Further, when the shift lever 71 is moved from a certain shift position to another shift position, the shift lever 71 does not switch to the automatic transmission mode for a short time while passing through the intermediate position.

The present invention is not limited to the above embodiments, but can be variously modified based on the gist of the present invention, and they are not excluded from the scope of the present invention.

[Brief description of the drawings]

FIG. 1 is a conceptual block diagram of an automatic transmission showing an embodiment of the present invention.

FIG. 2 is a schematic view of an automatic transmission showing an embodiment of the present invention.

FIG. 3 is a diagram illustrating an operation of the automatic transmission according to the embodiment of the present invention.

FIG. 4 is a schematic diagram of a control device for an automatic transmission according to an embodiment of the present invention.

FIG. 5 is an input side block diagram of the control device for the automatic transmission according to the embodiment of the present invention.

FIG. 6 is an output side block diagram of the control device for the automatic transmission according to the embodiment of the present invention.

FIG. 7 is a first main flowchart showing the operation of the automatic transmission according to the embodiment of the present invention.

FIG. 8 is a second main flowchart showing the operation of the automatic transmission according to the embodiment of the present invention.

FIG. 9 is a diagram showing a shift pattern of the automatic transmission according to the embodiment of the present invention.

FIG. 10 is a diagram showing an operation table of a shift position sensor in the embodiment of the present invention.

FIG. 11 is a first flowchart of a manual shift SW input process according to the embodiment of the present invention.

FIG. 12 is a second flowchart of the manual shift SW input process in the embodiment of the present invention.

[Explanation of symbols]

31 control device 71 shift lever 72 a hydraulic circuit 73 shift stage setting section 74 automatic shift mode returning unit SW1 first switch SW2 second switch t ₁ set value Delta] t ₁ hour

──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Shinji Kasuga 1 Toyota Town, Toyota City, Aichi Prefecture Toyota Motor Corporation (72) Inventor Yasuo Hojo 1 Toyota Town, Toyota City, Aichi Prefecture Toyota Motor Corporation ( 72) Inventor Kunihiro Iwazuki 1 Toyota Town, Toyota City, Aichi Prefecture Inside Toyota Motor Corporation (56) References JP-A-5-164237 (JP, A) JP-A-3-199758 (JP, A) Showa 61-148722 (JP, U) Actually open Showa 62-93450 (JP, U) (58) Fields investigated (Int. Cl. ⁷ , DB name) F16H 59/00-61/12 F16H 61/16-61 / 24 F16H 63/40-63/48

Claims (3)

(57) [Claims] 1. A automatic shift mode for shifting to the speed which is selected in correspondence with the traveling state of the vehicle, and the automatic transmission capable of setting the manual shift mode for shifting to the selected gear by the shift operation Machine, parallel to each other
Extending between the first and second portions and between the first and second portions
And a third portion connecting the first and second portions.
A predetermined gear is set at one end and the other end, respectively.
H in which the automatic transmission mode is set at the intermediate position of the third part
The shift path of the pattern and the movement along the shift path
It is, range in the automatic shift mode, and a shift lever for selecting the shift speed in the manual shift mode, Izu of the shift lever is at one end and the other end of the third portion
A first switch for detecting whether or not the shift lever is located at one end of the first and second portions, and
A second switch for detecting whether the located one of the ends, a control device for generating the shift output performs shift determination in correspondence with the selected range and gear position by the shift lever, A hydraulic circuit that achieves each shift speed in accordance with the shift output of the control device, wherein the control device is configured such that, when in the manual shift mode , the first and second switches are both shift levers.
Is one of the one or other ends of the first to third parts
While the first switch and the second switch are
Shift speed setting means to set the gear position in correspondence with the combination of the pitch of the signal, and in the manual shift mode, the first, second switch are both the shift lever is first to
Located at one end or the other end of the third part
While detecting a no, then counting the automatic shift mode returning timer, Ru <br/> an automatic shift mode restoring hand stage to return to the automatic shift mode when measured time exceeds the set value An automatic transmission characterized in that: Wherein the control device, contact the manual shift mode
And the shift lever is provided at one end of the first and second portions and at another end.
Has it been detected that it is not located on any of the edges
At either one end or the other end of the third part.
The time until it is detected that no
Time and the lower limit and upper limit of the set value.
The automatic transmission according to claim 1, again comprising a setting value changing means to set. 3. The vehicle is selected according to the running state of the vehicle.
For automatic shift mode that shifts to the shift speed and shift operation
Therefore, the manual shift mode for shifting to the selected gear
Automatic transmission that can be set parallel to each other
Extending between the first and second portions and between the first and second portions
And a third portion connecting the first and second portions.
A predetermined gear is set at one end and the other end, respectively.
H in which the automatic transmission mode is set at the intermediate position of the third part
The shift path of the pattern and the movement along the shift path
Range in automatic shift mode, and manual shift mode.
Shift lever for selecting a gear position in the
The shift lever is located at one end of the third part and at the other end
A first switch for detecting whether or not it is located
And the shift lever is connected to one end of the first and second portions and the other.
Detect if it is on one of the edges
Selected by the second switch and the shift lever
The gearshift is determined according to the range and gear
Control device for generating a shift output in a vehicle, and a shift control of the control device
With a hydraulic circuit that achieves each gear position corresponding to the output
In addition, the control device controls the speed in the manual shift mode.
And the first and second switches are both shift levers.
Is one of the one or other ends of the first to third parts
While the first switch and the second switch are
Gear shifting that sets the gear position according to the combination of the switch signals
Step setting means, in the manual shift mode, the first and the second
2 switches, the shift levers are first to third
Not located on one or other end of the part
The automatic shift mode return timer is counted while
Automatically changes when the measured time exceeds the set value.
Automatic shift mode return means for returning to the speed mode;
In the dynamic shift mode, the shift lever is moved between the first and second shift levers.
Is not located at either one end or the other end of the
Is detected, one of the ends of the third portion and the other end
Time until it is detected that it is not located in any of
Time, the measured time, and the lower and upper limits of the set value.
And a setting value changing means for setting the setting value again by comparing
Automatic transmission characterized by the following.