JP2008190633A - Continuously variable transmission with manual mode - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To freely select a manual stepped gear shift treatment for quickly and variably setting a reduction gear ratio in manual mode and a manual linear gear shift treatment for optionally setting the reduction gear ratio without increasing the number of parts. <P>SOLUTION: When a manual mode switch 37 is turned ON by moving a select lever 43 to a sub gate 44b side, a present reduction gear ratio ε is fixed at a fixed reduction gear ratio ε1 (S4). When the ON time Tc of an up-shift switch 35a or a down-shift switch 35b is shorter than a short push determination time To, the manual stepped gear shift treatment is performed (S10). When the ON time Tc exceeds the short push determination time To, the manual linear gear shift treatment is performed (S9). <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention has a stepped speed change process and a linear speed change as a gear ratio control in the manual mode, and both speed change processes can be arbitrarily selected according to the duration of the operation signal from the shift operation means. The present invention relates to a continuously variable transmission with mode.

  A continuously variable transmission represented by a belt type or a toroidal type can set an optimum gear ratio steplessly based on operating conditions such as a throttle opening, a vehicle speed, and an engine rotational speed. However, if you want to obtain a large driving torque when traveling on an uphill road or when accelerating, or if you want to apply strong engine braking when traveling on a downhill road, the shift pattern is preset for each driving region. There is a problem that a gear ratio other than the above cannot be set, and the driver feels uncomfortable feeling such as insufficient drive torque or insufficient deceleration.

  For this reason, a continuously variable transmission having a manual mode in which a driver can arbitrarily set a gear ratio has been proposed recently. For example, in Patent Document 1 (Japanese Patent Application Laid-Open No. 9-317866), the gear ratio of a continuously variable transmission is fixed to a plurality of gears, and the gear is downshifted every time the driver turns on the downshift switch. A technique is disclosed in which the gear position is upshifted each time the upshift switch is turned on.

Patent Document 2 (Japanese Patent Application Laid-Open No. 2004-360848) discloses a technique for linearly changing a gear ratio in proportion to an ON time when a downshift switch or an upshift switch is turned on.
JP-A-9-317866 JP 2004-360848 A

  However, as disclosed in Patent Document 1 described above, in the technique of controlling the transmission ratio as if it is a fixed stage, a continuously variable transmission with respect to a driver's operation of a shift switch (downshift switch or upshift switch). Although the speed change response is good, the gear ratio of each gear stage is fixed in advance, so when shifting down, the driver may feel excessive deceleration or insufficient deceleration. There is a possibility.

  On the other hand, in the technique disclosed in Patent Document 2, since the gear ratio changes in proportion to the ON time of the shift switch (downshift switch, upshift switch), the gear ratio according to the driver's preference is set. It can be set arbitrarily. However, since the gear ratio is changed linearly, it takes time to reach the desired gear ratio, and it is not possible to perform a quick gear shifting operation when traveling uphill or downhill, and the driver feels uncomfortable due to a response delay. There is a problem that will give.

  As a countermeasure, a fixed shift stage shift switch and a linear shift shift switch may be provided so that the driver can use them as necessary. Providing the shift switch and the linear shift shift switch separately makes the operation complicated and unusable. Furthermore, since it is necessary to provide two sets of shift switches having the same function, there is a problem that the product cost increases due to an increase in the number of parts.

  In view of the above circumstances, the present invention can not only increase the number of parts, but also can quickly variably set the gear ratio in the manual mode, and can arbitrarily set the gear ratio, thereby improving operability. It is an object of the present invention to provide a continuously variable transmission with a manual mode that is good and that can suppress an increase in product cost.

  In order to achieve the above object, the present invention provides a shift operating means for selecting a gear ratio of the continuously variable transmission in the manual mode by external operation, and a shift of the continuously variable transmission based on an operation signal from the shift operating means. In a continuously variable transmission with a manual mode having a shift control means for setting a ratio, the shift control means includes an operation signal timing means for timing the duration of an operation signal from the shift operation means in the manual mode, Operation signal duration determination means for comparing the operation signal duration measured by the operation signal timing means with the short press determination time; and the operation signal duration measured by the operation signal duration determination means for the short press When it is determined that the speed is shorter than the determination time, the stepped speed change process in which the speed ratio of the continuously variable transmission is fixed to a plurality of preset speeds is executed. And a linear shift process in which the speed ratio of the continuously variable transmission is continuously changed according to the duration when it is determined that the duration of the operation signal is longer than the short press determination time. Linear shift processing means to be executed.

  According to the present invention, in the manual mode, when the duration of the operation signal from the shift operation means is shorter than the short press determination time, the step-shift process is executed, and when the duration is long, the linear shift process is executed. The stepped shift process and the linear shift process can be selected or switched by operating one shift operating means. As a result, the cost of the product can be suppressed without increasing the number of parts of the shift operation means, and the gear ratio in the manual mode can be quickly and variably set when the stepped shift process is selected. When the linear shift process is selected, the gear ratio can be arbitrarily set and the operability is good.

  Hereinafter, an embodiment of the present invention will be described with reference to the drawings. FIG. 1 shows a schematic configuration diagram of a continuously variable transmission with a manual mode.

  Reference numeral 1 in FIG. 1 denotes an engine, and an output shaft of the engine 1 is connected to a forward / reverse switching device 4 provided in the continuously variable transmission 3 via a starting clutch 2 such as an electromagnetic clutch or a torque converter. The forward / reverse switching device 4 is connected to a pulley input shaft 5b that supports the primary pulley 5a of the continuously variable transmission 3, and is connected to a pulley output shaft 5c arranged in parallel to the pulley input shaft 5b. A pulley 5d is attached to the shaft, and a drive belt 5e is wound around the pulleys 5a and 5d. Further, the pulley output shaft 5c is connected to the differential device 6b through the reduction gear group 6a of the final reduction device 6, and the drive shaft 7 is attached to the differential device 6b so that the front wheels or the rear drive wheels 7a are attached to the differential device 6b. Has been.

  The continuously variable transmission 3 is a belt type, the pulley groove width is set by the primary pressure supplied to the primary hydraulic chamber 5f provided in the primary pulley 5a, and is supplied to the secondary hydraulic chamber 5g provided in the secondary pulley 5d. With the secondary pressure, a tension necessary for torque transmission is applied to the secondary pulley 5d. The primary pressure and the secondary pressure are set based on the engine operating state in a transmission control unit (TCU) 21 serving as a shift control means described later, and the groove widths of both pulleys 5a and 5d provided in the continuously variable transmission 3 are inversely proportional. Set the state to obtain the desired gear ratio. The continuously variable transmission may be a toroidal type.

  The TCU 21 is mainly composed of a microcomputer, and has a well-known CPU, ROM, RAM, and the like. The CPU sets a gear ratio of the continuously variable transmission 3 according to a control program stored in the ROM.

  On the input side of the TCU 21, an engine speed sensor 31 for detecting the engine speed Ne, a throttle opening sensor 32 for detecting an opening (throttle opening) θ of a throttle valve (not shown), and the continuously variable transmission 3 The primary pulley rotation speed sensor 33 for detecting the rotation speed (primary rotation speed) Np of the primary pulley 5a, the secondary pulley rotation speed sensor 34 for detecting the rotation speed (secondary rotation speed) Ns of the secondary pulley 5d, and the continuously variable transmission 3 Upshift switch 35a and downshift switch 35b constituting shift switch group 35, which is a shift operation means for selecting a gear ratio of the continuously variable transmission 3 by external operation, and a shift operation means for selecting the gear ratio of continuously variable transmission 3 by external operation. Temporary upshift switch 3 constituting a temporary shift switch group 36 a and temporary downshift switch 36b, the manual mode switch 37, etc. are connected.

  Further, a line pressure control solenoid valve 15a and a primary pressure control solenoid valve 15b constituting the shift control actuator 15 for controlling the hydraulic pressure of the continuously variable transmission 3 are connected to the output side of the TCU 21.

  On the other hand, as shown in FIG. 2, a select gate 44 is opened in the range escutcheon 42 of the select operation unit 41 provided in the center console in the vehicle interior, and the select lever 43 projects from the select gate 44. . The select gate 44 includes a main gate 44a, a sub-gate 44b formed in parallel with the main gate 44a, and a through gate 44c that communicates both gates 44a and 44b in the drive (D) range of the main gate 44a. Yes. In addition to the D range, four positions of a neutral (N) range, a reverse (R) range, and a parking (P) range are set in the main gate 44a. Each range can be selected by moving the select lever 43.

  The manual mode switch 37 described above is disposed in the through gate 44c. The manual mode switch 37 is a seesaw switch or a slide switch. When the select lever 43 moves from the main gate 44a to the sub gate 44b, an ON signal is continuously output, and when the select lever 43 moves from the sub gate 44b to the main gate 44a, an OFF signal is output. Output continuously.

  An upshift switch 35a is disposed at the upshift (+) position at the front end of the sub-gate 44b, and a downshift switch 35b is disposed at the downshift (−) position at the rear end. Both shift switches 35a and 35b are normally open switches, and an ON signal is output only when the driver presses the selector lever 43 through an external operation.

  When the driver moves the select lever 43 within the main gate 44a, a range signal corresponding to the set range of the select lever 43 is output to the TCU 21 from an inhibitor switch (not shown).

  On the other hand, when the select lever 43 in the main gate 44a is moved to the sub gate 44b through the through gate 44c, the manual mode switch 37 is turned on in the process and the state is continued. The select lever 43 facing the sub-gate 44b is elastically supported at a neutral position between the upshift (+) position and the downshift (−) position. In this state, when the driver moves the select lever 43 to the upshift (+) position, the upshift switch 35 a is turned on, and an ON signal (operation signal) is output to the TCU 21. When the driver moves the select lever 43 to the downshift (−) position, the downshift switch 35 b is turned on, and an ON signal (operation signal) is output to the TCU 21. When the driver releases the pressing force on the select lever 43, the select lever 43 is returned to the neutral position, and the signal output from the shift switch 35a or 35b pressed by the select lever 43 is inverted to turn off the signal. Is output.

  As shown in FIG. 3, the temporary upshift switch 36 a and the temporary downshift switch 36 b described above are respectively disposed in the spoke portions 46 a extending to the left and right of the steering handle 46. Both shift switches 36a and 36b are normally open switches, and an ON signal (operation signal) is output to the TCU 21 only while the driver is turning on the shift switch 36a or 36b by an external operation. Is inverted and an OFF signal is output.

  Next, the hydraulic circuit of the continuously variable transmission 3 will be described. Reference numeral 11 in FIG. 1 denotes an engine-driven or electric oil pump. A discharge port of the oil pump 11 is communicated with a line pressure control valve 13 through a line pressure oil passage 12. Furthermore, the line pressure control valve 13 is a line constituting a secondary hydraulic chamber 5g, a primary pressure control valve 14, and a shift control actuator 15 provided in the secondary pulley 5d of the continuously variable transmission 3 via the line pressure oil passage 12. The pressure control solenoid valve 15a and the primary pressure control solenoid valve 15b are communicated with each other through an orifice 16.

  The line pressure control solenoid valve 15a and the primary pressure control solenoid valve 15b are controlled by a primary pulley drive signal such as a duty ratio output from the TCU 21, and the line pressure is controlled from the line pressure control solenoid valve 15a through the oil passage 17. The line operating pressure is supplied to the control valve 13, and the primary pressure is supplied from the primary pressure control solenoid valve 15 b to the primary pressure control valve 14 through the oil passage 18.

  The line pressure control valve 13 sets the line pressure Ps based on the gear ratio ε and the engine torque T by the line operating pressure. Further, the primary pressure control valve 14 is provided in the primary pressure control valve 14 upstream of the primary pressure control valve 14 and the primary pulley 5a of the continuously variable transmission 3 in accordance with the balance between the primary pressure and the line pressure Ps. By switching between an oil supply position that connects the oil passage 19 communicating with the primary hydraulic chamber 5f and an oil discharge position that shuts off the oil passages 12 and 19 and drains the oil passage 19, the primary hydraulic chamber 5f Shift control is performed by controlling the hydraulic pressure to be supplied.

  The TCU 21 executes the automatic transmission mode when the OFF signal is output from the manual mode switch 37, and executes the manual mode when the ON signal is output.

  When the automatic transmission mode is executed in the TCU 21, first, a signal from an inhibitor switch (not shown) is read to check whether or not the select lever 43 is set to the D range, and is set to the D range. The automatic transmission mode is executed. On the other hand, when the manual mode is executed in the TCU 21, it becomes possible to receive ON signals (operation signals) from the shift switch groups 35 and 36, and the shift switches 35a and 35b (36a) constituting the shift switch groups 35 (36). , 36b), the stepped speed change mode is executed in the case of a short press, and the linear speed change mode is executed in the case of a long press.

  The shift control for the continuously variable transmission 3 executed by the TCU 21 is specifically processed according to the flowcharts shown in FIGS.

  When the ignition switch is turned on, first, the shift mode setting routine shown in FIG. 4 is executed for each set calculation cycle. First, in step S1, the output signal of the manual mode switch 37 is read to determine whether or not the manual mode switch 37 is ON. Investigate.

  As described above, the manual mode switch 37 is turned on when the select lever 43 is moved from the main gate 44a side through the through gate 44c to the sub gate 44b side.

  When the manual mode switch 37 is OFF, since the select lever 43 is at the main gate 44a, the process proceeds to step S2, the automatic transmission mode is executed, and the routine is exited. In the automatic shift mode, a signal from an inhibitor switch (not shown) is read, the range position where the select lever 43 is set is checked, and when it is set to the D range, the shift map shown in FIG. Accordingly, the gear ratio is set so that the relationship between the primary rotational speed Np and the vehicle speed V becomes an optimum value determined by the throttle opening θ detected by the throttle opening sensor 32 in a shift region surrounded by a solid line according to the traveling state of the vehicle. ε (ε = Np / Ns) is set.

  On the other hand, when it is determined that the manual mode switch 37 is ON, the process proceeds to step S3, and the manual mode is executed after step S3. That is, first, in step S3, the currently set speed ratio ε is read, and in step S4, the fixed speed ratio ε1 is set with the speed ratio ε (ε1 ← ε).

  Next, the process proceeds to step S5, where the output signals of the upshift switch 35a (36a) and the downshift switch 35b (36b) constituting the shift switch group 35 (36) are read, and an ON signal is output from any one of the switches. Check for no. When no ON signal is output from any switch, that is, when OFF signals are output from all shift switches, the process returns to step S1. When an ON signal is output from any of the switches, the process proceeds to step S6, and the count value Tc of the counter timer as the operation signal timing means indicating the ON time is incremented (Tc ← Tc + 1). Time the duration.

  Thereafter, the process proceeds to step S7, where the count value (ON time) Tc of the timer counter is compared with the short press determination value (determination time) To (for example, a value corresponding to 0.5 to 1.0 [sec]). When the count value Tc is within the short press determination value To, the process proceeds to step S8. Further, when Tc ≧ To, that is, when the count value Tc of the timer counter is incremented even if the short press determination value To is exceeded, it is determined that the long press is made and the process branches to step S9. The process in step S7 corresponds to the operation signal duration determination unit of the present invention.

  Then, when the process proceeds to step S8, it is checked whether or not the switch determined to be ON in step S5 is turned off. If the ON state is continued, the process returns to step S6 and increments the count value Tc of the counter timer. In step S8, when it is determined that the switch determined to be ON in step S5 described above has been turned off, it is determined that the switch is short-pressed, the process proceeds to step S10, the manual step-change process is executed, and the process proceeds to step S12. The processing in step S10 corresponds to the stepped speed change processing means of the present invention. The manual stepped shift process will be described later.

  Further, when the process proceeds from step S7 to step S9, the manual linear shift process is started. The manual linear shift process will be described later. The processing in step S9 corresponds to the linear shift processing means of the present invention.

  Then, when the process proceeds from step S9 to step S11, it is checked whether or not the switch determined to be ON in step S5 is turned OFF. If the ON state continues, step S9 is repeatedly executed. Thereafter, when the switch determined to be ON in step S5 is turned OFF, the process proceeds to step S12.

  Thereafter, when the process proceeds from step S10 or step S11 to step S12, the count value Tc of the counter timer is cleared (Tc ← 0), and the process returns to step S1.

  Thus, in the present embodiment, whether the driver has selected manual stepped gear shifting or manual linear shifting is determined based on the switch operation of the switch for switching between manual stepped shifting and manual linear shifting. Instead, the determination is made based on the OFF timing of the upshift switch 35a (36a) and the downshift switch 35b (36b) constituting the shift switch group 35 (36). For this reason, for example, when selecting manual stepped transmission mode by short press and performing upshift or downshift, if there is a feeling of lack of gear shift or a sense of lack of deceleration, long press the shift switch. After the short press determination value (time) To elapses, manual linear shift processing is automatically started, so the driver sets the gear ratio according to his / her preference without pressing the shift switch again. can do.

  By the way, once the shift switch is turned on and then turned off, the program proceeds to step S4 through step S1, the current speed ratio ε is fixed as the fixed speed ratio ε1 (ε1 ← ε), and the shift switch is turned on in step S5. It will be in a standby state until it is turned on. Therefore, in the state where the manual mode switch 37 is ON, the manual step-shift process and the manual linear shift process can be arbitrarily switched according to the OFF timing after the shift switch is once turned ON. For this reason, for example, when the shift switch is pressed for a short time and the manual stepped shift process is executed, and if acceleration is felt insufficient, the shift ratio can be finely adjusted by continuing to press the shift switch again. In other words, in the present embodiment, the gear ratio is not set at the timing when the shift switch is turned on, and the manual stepped speed change process and the manual linear speed change process are switched based on the ON time Tc until the timing when the shift switch is turned off. When the driver wants to perform the manual linear shift process, the user can shift to the manual linear shift process without going through the manual stepped shift process by continuously pressing the shift switch. On the other hand, in the technique disclosed in Patent Document 2 (Japanese Patent Laid-Open No. 2004-360848) described above, even when the gear ratio is changed by a predetermined amount in accordance with the ON operation, even when it is desired to finely adjust the gear ratio Unless a gear shift process having a large gear ratio change amount corresponding to the manual stepped gear shift process is performed, it is not possible to shift to a manual linear gear shift process in which the gear ratio can be finely adjusted.

  Next, the manual step shifting process executed in step S10 will be described. This manual stepped speed change process is executed by a manual stepped speed change process subroutine shown in FIG.

  In this subroutine, first, in step S21, the stepped shift pattern stored in the storage means is read, and the process proceeds to step S22. FIG. 7B shows a stepped shift pattern. This shift pattern is the same as the gear ratio (gear ratio) of a normal M / T (manual transmission) vehicle, with seven gear stages from 1st to 7th gears where the gear ratio is fixed for each preset gear position. Is set.

  When the process proceeds to step S22, the fixed gear ratio ε1 set in step S4 of FIG. 2 is compared with the gear ratios of the respective gear speeds set in the stepped gearshift pattern, and the fixed gear ratio having the closest gear ratio is compared. A is specified. The fixed gear stage A is identified by converting the fixed gear ratio ε1 into a gear stage based on, for example, the gear ratio of each gear stage set in the stepped shift pattern (eg, 3.2 speed, 3.6 speed, 4.1 speed). ). Then, the converted gear is rounded off and adapted to the actual gear (for example, 3rd speed, 4th speed, 4th speed).

  Next, the process proceeds to step S23, and it is checked whether the upshift switch 35a or 36a is ON. If it is ON, the process proceeds to step S24. If it is OFF, the downshift switch 35b or 36b is ON. move on.

  When the process proceeds to step S24, the fixed gear stage A is upshifted by one step (A ← A + 1), and the process proceeds to step S26. In step S25, the fixed gear A is downshifted by one step (A ← A-1), and the process proceeds to step S26. Therefore, in the manual stepped shift process subroutine, the shift stage is upshifted or downshifted each time the upshift switch 35a or 36a or the downshift switch 35b or 36b is turned on.

  In step S26, the target speed ratio is corresponding to the fixed speed A set in step S24 or step S25 is set based on the stepped shift pattern, and the target speed ratio is is set in step S27. The corresponding primary pulley drive signal is output to the primary pressure control solenoid valve 15b, and the routine is exited. The target gear ratio is is set with an upper limit value and a lower limit value, the upper limit value is a value corresponding to the first gear ratio, and the lower limit value is a value corresponding to the seventh gear ratio. .

  The primary pressure control solenoid valve 15b operates in response to the primary pulley drive signal output from the TCU 21, and supplies the primary pressure from the primary pressure control solenoid valve 15b to the primary pressure control valve 14. The primary pressure control valve 14 controls the hydraulic pressure supplied to the primary hydraulic chamber 5f by the primary pressure, sets the groove widths of the pulleys 5a and 5d to an inversely proportional state, and causes the gear ratio ε to reach the target gear ratio is.

  Next, the manual linear shift process executed in step S9 will be described. In the manual linear speed change processing subroutine shown in FIG. 6, first, in step S31, the target speed ratio is is set as a fixed speed ratio ε1 (is ← ε1), and then in step S32, whether the upshift switch 35a or 36a is ON. If it is ON, the process proceeds to step S33. If it is OFF, the downshift switch 35b or 36b is ON, and the process proceeds to step S34.

  When the process proceeds to step S33, the upshift change amount dα for each calculation cycle set based on the preset shift gradient is subtracted from the target speed ratio is (is ← is−dα), and the process proceeds to step S35. . Further, when the process proceeds to step S34, the downshift change amount dβ for each calculation cycle set based on a preset shift gradient is added to the target speed ratio is (is ← is + dβ), and the process proceeds to step S35. . In this embodiment, the shift gradient at the time of upshift is set larger than the shift gradient at the time of downshift (dα> dβ). However, the shift gradient at the time of upshift and the shift gradient at the time of downshift may be made equal (dα = dβ), or the change rate of the shift gradient is variably set as the shift switch ON time elapses (for example, greatly changes). ).

  In step S35, the primary pulley drive signal corresponding to the target speed ratio is is output to the primary pressure control solenoid valve 15b, and the routine is exited. Note that the target speed ratio is is set only in the speed change region surrounded by the solid line of the speed change map shown in FIG.

  As a result, in the manual linear shift process, the gear ratio is continuously changed in proportion to the ON time of the shift switches 35a, 35b or 36a, 36b.

  The primary pressure control solenoid valve 15b operates in response to the primary pulley drive signal output from the TCU 21, and supplies the primary pressure from the primary pressure control solenoid valve 15b to the primary pressure control valve 14. The primary pressure control valve 14 controls the hydraulic pressure supplied to the primary hydraulic chamber 5f by the primary pressure, sets the groove widths of the pulleys 5a and 5d to an inversely proportional state, and causes the gear ratio ε to reach the target gear ratio is.

  As described above, in this embodiment, when the select lever 43 is moved to the side of the sub gate 44b through the through gate 44c, the manual mode switch 37 is turned ON, and the shift mode is switched from the automatic shift mode to the manual mode. The gear ratio ε is fixed. After that, when the upshift switch 35a or the downshift switch 35b is turned on by operating the select lever 43, if the ON time Tc is shorter than the short press determination value (determination time) To, the manual step-change process is executed. If the ON time Tc is longer than the short press determination value (determination time) To, manual linear shift processing is started.

  Also, when the temporary upshift switch 36a or the temporary downshift switch 36b provided on the steering handle 46 is turned ON when the select lever 43 is positioned on the main gate 44a side and the manual mode switch is OFF. In the same manner as when the manual mode switch 37 is turned on by turning on the temporary upshift switch 36a or the temporary downshift switch 36b, the shift mode is switched from the automatic shift mode to the manual mode, and the current gear ratio ε Is fixed. That is, the temporary upshift switch 36a and the temporary downshift switch 36b also have a function as a manual mode switch for switching between the automatic transmission mode and the manual transmission mode.

  Thereafter, when the ON time Tc of the temporary upshift switch 36a or the temporary downshift switch 36b is shorter than the short press determination value (determination time) To, the manual step-shift process is executed, and the ON time Tc is short pressed. When it is longer than the determination value (determination time) To, manual linear shift processing is started. When the temporary upshift switch 36a or the temporary downshift switch 36b is operated to shift from the automatic shift mode to the manual shift mode, a predetermined release condition (for example, the temporary upshift switch 36a or the temporary downshift for a predetermined time) If there is no operation of the shift switch 36b), the automatic shift mode is automatically restored.

  On the other hand, if the temporary upshift switch 36a or the temporary downshift switch 36b provided on the steering handle 46 is turned on when the select lever 43 is positioned on the sub-gate 44b side and the manual mode switch is turned on. Similarly to the case where the upshift switch 35a or the downshift switch 35b is turned on when the manual mode switch 37 is ON, the ON time Tc of the temporary upshift switch 36a or the temporary downshift switch 36b is set. Is shorter than the short press determination value (determination time) To, manual stepped shift processing is executed, and the ON time Tc of the temporary upshift switch 36a or the temporary downshift switch 36b is a short press determination value. If determination time) longer than To, manual linear shift process is started.

  As a result, it is possible to freely select manual stepped shift and manual linear shift by simply changing the OFF timing after turning on one upshift switch 35a, 36a or downshift switch 35b, 36b. It is possible to respond finely to the needs of diversifying users.

  In addition, it is possible to select or switch between manual stepped shift processing and manual linear shift processing by operating one shift switch, thus preventing an increase in product cost without increasing the number of switch parts. can do. In addition, when manual stepped shift is selected, the shift stage (speed ratio) can be quickly variably set every time the shift switch is turned on. When manual linear shift is selected, the shift switch ON time is set. Since the gear ratio can be arbitrarily set according to the above, the operability is good.

  In this embodiment, the gear ratio is set based on the duration of the ON state of the shift switch after the short press determination value (determination time) To has elapsed since the shift switch was turned ON. The speed ratio may be set based on the duration of the ON state after turning on. That is, the setting method of the gear ratio in the manual linear shift process is arbitrary.

  Further, when the manual stepped shift process is selected by pressing the shift switch 35a, 35b or 36a, 36b for a short time, first, the closest fixed shift stage is identified from the current gear ratio ε, and the identified fixed shift stage is selected. As a reference, when the upshift switch 35a or 36a is turned on, it is shifted up by one step, and when the downshift switches 35b and 36b are turned on, it is shifted down by one step. A shift operation in accordance with the driver's intention can be realized without giving the driver a feeling of lack or excessive shift.

  Next, with reference to a timing chart shown in FIG. 8, an example of shift control executed in the above-described shift mode control routine, manual stepped shift process subroutine, and manual linear shift process subroutine will be described. The speed change operation is performed by operating the select lever 43 with the upshift switch 35a and the downshift switch 35b provided in the sub-gate 44b.

  When the select lever 43 is moved from the main gate 44a to the sub gate 44b and the manual mode switch 37 is turned on (elapsed time t0), the gear ratio ε is set as the fixed gear ratio ε1 (ε1 ← ε).

  Next, when the upshift switch 35a is turned on by operating the select lever 43 (elapsed time t1), time counting by the counter timer is started. When the upshift switch 35a is turned off (elapsed time t2), the ON time Tc at that time is shorter than the preset short press determination time To (Tc <To). The step shifting process is started.

  Then, first, the fixed speed ratio ε1 is converted into a speed stage based on the speed ratio of each speed stage set in the stepped shift pattern (2.2 speed in the figure). Then, the converted gear stage is rounded off, and the actual gear stage (second gear in the figure) is specified as the closest fixed gear stage A. Then, an upshift (set to the third speed in the figure) from this fixed gear A is performed.

  Thereafter, when the upshift switch 35a is turned on again, the time counting by the counter timer is started again, and when the ON time Tc exceeds the short press determination time To (elapsed time t4), the manual linear shift process is started and the shift is performed. The ratio ε is decreased (accelerated) along the speed change gradient during the upshift. When the upshift switch 35a is turned off (elapsed time t5), the fixed gear ratio ε1 is set as the gear ratio ε at that time (ε1 ← ε), and the gear ratio is fixed.

  Thereafter, when the downshift switch 35b is turned on (elapsed time t6), time counting by the counter timer is started, and when the ON time Tc exceeds the short press determination time To (elapsed time t7), manual linear shift processing is started. The speed ratio ε is increased (decelerated) along the speed change gradient at the time of downshift. When the downshift switch 35b is turned off (elapsed time t8), the fixed gear ratio ε1 is set as the gear ratio ε at that time (ε1 ← ε), and the gear ratio is fixed.

  After that, when the downshift switch 35b is turned on and the ON time Tc is shorter than the short press determination time To, the manual step shifting process is started at the OFF timing of the downshift step S35b. On the basis of the gear ratios of the respective gear speeds, the fixed gear ratio ε1 is converted into gear speeds (3.8 speed in the figure). Then, the converted gear stage is rounded off, and the actual gear stage (fourth speed in the figure) is specified as the closest fixed gear stage A. Then, a downshift (set to the third speed in the figure) from this fixed gear A is performed.

  Thereafter, every time the downshift switch 35b is pressed for a short time, the gear position is downshifted in accordance with the OFF timing (elapsed time t9, t10, t11).

  The present invention is not limited to the above-described embodiment. For example, when a manual stepped shift process is started by a short press of a shift switch and the shift stage is upshifted or downshifted, this upshift, Alternatively, the next shift operation may not be accepted until the downshift is completed.

  In addition, an example is shown in which both the upshift switch 35a and the downshift switch 35b constituting the shift switch group 35 and the temporary upshift switch 36a and the temporary downshift switch 36b constituting the temporary shift switch group 36 are provided. Only one of the shift switch group 35 and the temporary shift switch group 36 may be provided.

Schematic configuration diagram of continuously variable transmission with manual mode Perspective view of select operation section provided on center console Perspective view around the steering handle Flowchart showing a shift mode setting routine Flow chart showing a manual step-change process routine Flow chart showing manual linear shift process (A) is a conceptual diagram of a shift map that is read in the automatic shift mode, and (b) is a conceptual diagram of a stepped shift pattern that is read when a manual step shifting process is executed. 5 is a timing chart showing an example of speed change control during manual mode execution, where (a) is a timing chart showing a change in gear ratio, (b) is a timing chart showing ON / OFF of an upshift switch, and (c) is a downshift. Timing chart showing ON / OFF of switch, (d) is a timing chart showing ON / OFF of manual mode switch

Explanation of symbols

3 ... continuously variable transmission 35 ... shift switch group,
35a: Upshift switch,
35b ... downshift switch,
36 ... Temporary shift switch group,
36a ... Temporary upshift switch,
36b ... Temporary downshift switch,
37 ... Manual mode switch
41 ... select operation part,
43 ... Select lever,
44 ... Select gate,
44a ... main gate,
44b ... sub-gate,
44c ... through gate,
ε ... speed ratio,
ε1 ... fixed gear ratio,
A ... fixed gear,
Tc: Count value (ON time)
To: Short press determination value (short press determination time),
dα: Upshift change amount,
dβ: Downshift change amount,
is ... Target gear ratio

Claims (7)

Shift operation means for selecting a gear ratio of the continuously variable transmission in the manual mode by external operation, and shift control means for setting the gear ratio of the continuously variable transmission based on an operation signal from the shift operation means. In continuously variable transmission with manual mode,
The shift control means includes
Operation signal timing means for timing the duration of the operation signal from the shift operation means in the manual mode;
Operation signal duration determination means for comparing the duration of the operation signal timed by the operation signal timing means with a short press determination time;
If it is determined that the duration of the operation signal measured by the operation signal duration determination unit is shorter than the short press determination time, the gear ratio of the continuously variable transmission is fixed to a plurality of preset gears. Stepped speed change processing means for executing the stepped speed change processing,
A linear shift process for executing a linear shift process in which a gear ratio of the continuously variable transmission is continuously changed according to the duration when it is determined that the duration of the operation signal is longer than the short press determination time Means for continuously variable transmission with a manual mode. The linear shift processing means executes the linear shift process based on a duration of the operation signal after the short press determination time has elapsed since the operation signal timing means starts measuring the duration of the operation signal. The continuously variable transmission with a manual mode according to claim 1. 3. The continuously variable transmission with manual mode according to claim 1 or 2, wherein the stepped shift processing means starts the stepped shift processing when an operation signal from the shift operating means is inverted. The stepped speed change processing means specifies the closest shift speed from the plurality of shift speeds based on the speed ratio at the time of starting the stepped speed change processing, and uses the specified shift speed as a reference. The continuously variable transmission with a manual mode according to any one of claims 1 to 3, wherein upshift or downshift is performed according to an operation signal from the shift operation means. 5. The linear shift processing unit according to claim 1, wherein the linear shift processing unit starts the linear shift processing when the duration of the operation signal reaches the short press determination time. 6. Continuously variable transmission with manual mode. 6. The continuously variable transmission with a manual mode according to any one of claims 1 to 5, wherein the linear shift processing means sets different shift gradients during upshifting and downshifting. The continuously variable transmission with manual mode according to any one of claims 1 to 6, wherein in the linear shift processing means, the rate of change of the shift gradient is varied with the lapse of the duration of the operation signal. .

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