JP4410287B2 - Shift control device for automatic transmission - Google Patents

Description

  The present invention relates to a shift control device for an automatic transmission having an automatic shift mode and a manual shift mode.

  Shift control in an automatic transmission for a vehicle is normally performed based on a shift characteristic map in which a shift stage is set according to a travel state, but a travel state in which a shift is executed is uniquely determined. The degree of freedom in shifting is small, and it is difficult for the driver to know when the shifting operation is performed during traveling.

  Therefore, recently, vehicles equipped with an automatic transmission equipped with a manual shift mode that can perform a shift operation also by a manual operation of a driver are commercially available.

  In such an automatic transmission, a manual range is generally set by adding a manual range to the shift position of a shift lever operated by a driver, and an upshift command or a downshift command is issued by operating the shift lever within the manual range. In addition, the automatic transmission is configured to sequentially shift from the current shift speed to the high speed shift speed or the low speed shift speed.

In addition, a manual shift mode that allows upshifting or downshifting based on the driver's intention by pressing a switch on the steering wheel (handle) while driving in the automatic transmission drive range (D range) An automatic transmission is proposed in Japanese Patent Laid-Open Nos. 2000-283281 and 2002-147588.
JP 2000-283281 A JP 2002-147588 A

  In the automatic transmission shift control device described in Patent Document 1 and Patent Document 2 described above, an upshift or a downshift can be performed by a switch operation while traveling in the D range, and driving in a manual shift mode based on the driver's intention is performed. Can enjoy.

  However, since the shift control device for the automatic transmission described in these prior arts does not disclose detailed control when shifting from the automatic shift mode to the manual shift mode, the driver's intention in the manual shift mode is not disclosed. There was a problem that I could not fully enjoy the respected manual-like driving.

  Further, in the shift control device for an automatic transmission described in Patent Document 2, as a return condition from the manual shift mode to the automatic shift mode, the lateral G acceleration is not more than a predetermined value, the vehicle is not coasting, and the vehicle speed is not less than a predetermined value. Three conditions are mentioned. These automatic speed change mode return conditions are deliberate from the viewpoint of smooth transition.

  Therefore, the object of the present invention is to broaden the range for driving the vehicle by providing two manual shift modes, a mode that can strongly respond to the driver's request and a mode that can respond to a certain degree. It is to provide a shift control device for a possible automatic transmission.

According to the first aspect of the present invention, the automatic shift mode for performing the shift operation by determining the shift speed or gear ratio to be set based on the accelerator opening and the vehicle speed, and the driving based on the manual operation of the driver and the vehicle speed. In a shift control device for an automatic transmission having a manual shift mode for performing a shift operation instructed by a driver, the manual shift mode is configured such that a driver selects a manual shift range position and selects an upshift switch or a downshift switch. A first manual shift mode for performing a shift operation instructed by an operation; and a second manual shift mode for performing a shift operation instructed by an operation of the upshift switch or the downshift switch by the driver selecting an automatic shift range position. The shift control device compares the current vehicle speed with a predetermined vehicle speed set in advance to determine whether the current vehicle speed is lower than the predetermined vehicle speed. A vehicle speed determining means for determining whether or not a downshift is instructed by the driver's manual operation, and if the vehicle speed determining means determines that the vehicle is in the area, a downshift permission for permitting the downshift And a shift control device for an automatic transmission, characterized in that the predetermined vehicle speed in the second manual shift mode is set to be lower than the predetermined vehicle speed in the first manual shift mode. .

  According to the first aspect of the invention, by providing two manual transmission modes, a mode that can strongly respond to the driver's request and a mode that can respond to a certain degree, the range for driving the vehicle is widened. Is possible.

  That is, the first manual shift mode is a mode in which the driver selects the manual shift range position and then the upshift switch or the downshift switch is operated so that the driver can respond to the driver's request as much as possible. Yes. Therefore, the predetermined vehicle speed is set to a vehicle speed within a range in which over-rotation of the engine can be prevented.

  The second manual shift mode is a mode in which an upshift switch or a downshift switch is operated after an automatic shift range position is selected, and can respond to a driver's request to some extent. Accordingly, the predetermined vehicle speed is set to a vehicle speed that is lower than that in the first manual shift mode, and is in a range in which it is possible to prevent over-rotation of the engine with a margin.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. Referring to FIG. 1, reference numeral 2 indicates a shift position of a shift lever suitable for use in the present invention. As is well known, P is a parking range, R is a reverse range, and N is a neutral range.

  Further, D is a drive range, and when the shift lever is in the D range, an automatic shift mode is performed in which a shift stage or a gear ratio to be set is determined based on the running state and a shift operation is performed. S is a sport range or a manual shift range, and enables manual-like running in an automatic transmission.

  FIG. 2 shows a paddle switch 6 provided on the steering wheel (handle) 4. The paddle switch 6 has an upshift switch 6a and a downshift switch 6b.

  When the shift lever is shifted to the S range, the shift to the manual shift mode is performed, and the manual shift can be performed by operating the paddle switch 6. That is, each time the upshift switch 6a is pressed, the gear is shifted up by one step, and every time the downshift switch 6b is pressed, the gear is shifted down by one step, so that a shift control similar to a manual transmission is possible.

  In this S range paddle shift, the upshift side can be upshifted within a range that does not cause a predetermined engine stall, and the downshift side is down within a range that does not cause a predetermined engine overspeed. Shift is possible.

  That is, in the S-range paddle shift, the gear position (speed ratio) selected by the paddle switch 6 is held, and operability similar to that of a manual transmission can be realized, which is suitable for sports driving.

  When the paddle switch 6 is operated while the shift lever is held in the D range, the shift mode is shifted to the D range paddle shift, and the shift mode is established to answer the driver's request to some extent. For example, a one-action operation can be performed without releasing a hand from a steering wheel for a deceleration operation frequently used during traveling.

  In other words, the D-range paddle shift can be upshifted or downshifted with a single action of operating the paddle switch 6, and aims to achieve both fuel efficiency and power performance.

  In the D-range paddle shift, kick-down is enabled by depressing the accelerator pedal rapidly, and the automatic return mode of the D-range is automatically returned when the vehicle cruise is described later.

  Referring to FIG. 3, there is shown a display example of the meter portion of the instrument panel 8 suitable for use in the shift control of the present invention. FIG. 3A shows an S range paddle shift. For example, when the fifth speed is selected, S is lit and M5 is displayed. FIG. 3B shows a D-range paddle shift. For example, when the fifth speed is selected, D is lit and 5 is displayed.

  FIG. 4 is a schematic system configuration diagram of the shift control apparatus according to the embodiment of the present invention. In FIG. 4, reference numeral 12 denotes an engine, and reference numeral 14 denotes an automatic transmission. The output of the engine 12 is transmitted to driving wheels (not shown) via the automatic transmission 14.

  The automatic transmission 14 includes a torque converter 16 and a multi-stage transmission gear mechanism 18. The torque converter 16 includes a lockup clutch (not shown), and the lockup clutch is turned on (engaged) and turned off (released) by controlling the solenoid 20 for lockup.

  The multi-speed gear mechanism 18 has five forward speeds in the present embodiment, and a desired speed stage can be achieved by changing the combination of excitation and demagnetization of a plurality of speed change solenoids 22 as speed change operation means as is well known. Is set. Of course, each of the solenoids 20 and 22 switches the operation mode of the hydraulic actuator for lock-up or speed change.

  Reference numeral 24 denotes a control unit (ECU) using a microcomputer, and signals from a throttle opening sensor 26, a vehicle speed sensor 28 and a gear position sensor 30 are input to the control unit 24.

  The throttle opening sensor 26 detects the opening of the throttle valve 32, that is, the throttle opening. The vehicle speed sensor 28 detects the vehicle speed, and the gear position sensor 30 detects the current gear position of the automatic transmission 14, that is, the gear position.

  Further, the shift lever position 2 is input to the control unit 24, and the signal of the upshift switch 6a or the downshift switch 6b of the paddle switch 6 is input. The control unit 24 outputs a control signal for turning on and off the lockup clutch to the solenoid 20 and a signal for shifting control to the solenoid 22.

  The control unit 24 basically includes a CPU, a ROM, a RAM, a clock (soft timer), an A / D converter or a D / A converter, and an input / output interface. Since it is a known configuration when used, its description is omitted.

  Next, an outline of the D range paddle shift control will be described with reference to FIG. First, it is assumed that the shift lever is in the D range, the accelerator or throttle is fully closed, and the vehicle is traveling at the fourth speed.

  When the downshift switch 6b is pressed at A, the shift to the D range paddle shift is made, the downshift to the third speed is performed, and the 7 segment lamp in the display meter portion is lit. When the accelerator pedal is depressed in B, the kickdown is activated to shift down to the 2nd speed and the 7 segment lamp goes out. When the accelerator pedal is returned at C, the shift is upshifted to the original hold stage, that is, to the third speed.

  When the upshift switch 6a is pressed at D, the upshift to the fourth speed is performed and the 7 segment lamp is lit. When it is determined at E that the vehicle is in the cruising running state, the vehicle returns to the automatic transmission mode in the D range, automatically upshifts to the fifth speed, and the 7-segment lamp is turned off.

  The D range paddle shift control according to the present invention can be (1) upshifted or downshifted by one-action paddle switch operation in the D range. (2) Kickdown is accepted even during D range paddle shift control. ) It is characterized in that the vehicle automatically returns to the automatic transmission mode of the D range upon judging the cruise of the vehicle.

  The D range paddle shift control is very effective under the following driving conditions.

(A) When the vehicle is close to the front car and light deceleration is necessary (b) When light deceleration is necessary before cornering (c) When strong deceleration is required in combination with the brake pedal The above is the D range paddle The overall outline of the shift control will be described. Next, the control of the portion according to the present invention will be described with reference to the principle block diagrams of FIGS.

  First, referring to the first principle block diagram of FIG. 6, the shift control device for an automatic transmission according to the present invention performs a shift operation by determining a shift stage or a gear ratio to be set in the D range 34 based on a running state. An automatic shift mode 36 and a manual shift mode 38 for performing a shift operation instructed by a driver's manual operation are provided.

  The region determination means 40 is a second region in which the current traveling state is in the first region of the traveling state where the downshift is performed at the current shift speed or gear ratio in the automatic transmission mode, or on the higher vehicle speed side than the first region. Determine whether it is in

  The upshift permission means 42 permits the upshift when the area determination means 40 determines that the vehicle is in the second area when an upshift is instructed by the driver's manual operation in the manual shift mode. To do.

  The S range 44 includes a first manual shift mode 46 in which the driver selects the S range (manual shift range position) and performs a shift operation instructed by operating the upshift switch or the downshift switch.

  The manual shift mode 38 of the D range 34 is a second manual shift mode in which the driver selects the automatic shift range position and performs a shift operation instructed by operating the upshift switch or the downshift switch.

  The vehicle speed determination means 48 determines whether or not the current vehicle speed is lower than the predetermined vehicle speed by comparing the current vehicle speed with a preset predetermined vehicle speed (vehicle speed for preventing engine overspeed). The downshift permission means 50 permits the downshift when the vehicle speed determination means 48 determines that the vehicle is in the region when the downshift is instructed by the driver's manual operation.

  The present invention is characterized in that the predetermined vehicle speed in the second manual shift mode 38, that is, the D-range paddle shift mode is set to be lower than the predetermined vehicle speed in the first manual shift mode 46.

  According to the present invention, by increasing the upshiftable region, an early upshift is possible in the D-range paddle shift, and the driver's request at the time of the upshift can be met.

  In addition, by permitting an upshift on the higher vehicle speed side than the downshift line, it is possible to prevent a high gear at an extremely low vehicle speed from running out of driving force and fuel consumption.

  The first manual shift mode 46 is a mode in which the upshift switch 6a or the downshift switch 6b is operated after the driver selects the manual shift range (S range), and responds as much as possible to the driver's request. I can do it. Therefore, the predetermined vehicle speed is set to a vehicle speed within a range in which over-rotation of the engine can be prevented.

  The second manual shift mode 38 is a mode in which the upshift switch 6a or the downshift switch 6b is operated after the driver selects the automatic shift range (D range), and can respond to the driver's request to some extent. I have to.

  Accordingly, the predetermined vehicle speed is set to a vehicle speed that is lower than the predetermined vehicle speed in the first manual shift mode 46, and is set to a vehicle speed within a range that can prevent over-rotation of the engine with a margin.

  According to the present invention, it is possible to widen the range of driving of the vehicle by providing two manual transmission modes, a mode that can strongly respond to a driver's request and a mode that can respond to a certain degree. .

  Next, referring to the second principle block diagram of FIG. 7, the first region determination means 52 moves to the first region where engine stall can be prevented when the current traveling state is upshifted from the current traveling state. Determine if there is.

  The second region determining means 54 is a third region in which the current running state is in the second region where downshifting is performed at the current gear position or gear ratio in the automatic transmission mode 36 or on the higher vehicle speed side than the second region. Determine if it is in the area.

  When an upshift is instructed by the driver's manual operation in the first manual shift mode 46, the upshift is permitted when the first region determination means 52 determines that the vehicle is in the first region.

  On the other hand, in the second manual shift mode 38, when an upshift is instructed by the driver's manual operation, the upshift is permitted when the second region determination means 54 determines that the vehicle is in the third region. .

  According to the present invention, the first manual shift mode 46 is a mode in which the upshift switch 6a or the downshift switch 6b is operated after the driver selects the manual shift range (S range). To be as responsive as possible. Therefore, the first area is set to an area in which engine stall can be prevented.

  On the other hand, the second manual shift mode 38 is a mode in which the upshift switch 6a or the downshift switch 6b is operated after selecting the automatic shift range (D range), and can respond to the driver's request to some extent. ing.

  Accordingly, the second region is set to be narrower than the first region in the first manual shift mode, and it is possible to prevent shift hunting, to achieve a high speed and a high gear ratio at an extremely low vehicle speed, and to achieve a driving force. Is set so as to prevent shortage of fuel or deterioration of fuel consumption.

  As described above, according to the present invention, by providing the two manual transmission modes of the mode that can strongly respond to the driver's request and the mode that can respond to some extent, the range for driving the vehicle can be expanded. It becomes possible.

  Next, with reference to the shift map of FIG. 8, the upshift permission area in the D range paddle shift control will be described. In FIG. 8, the upshift characteristic line 56 is a 1-2 upshift line, and the downshift characteristic line 58 is a 2-1 downshift line. S1 is the lowest gear stage that can be taken on the shift map, and S2 is the highest gear stage that can be taken on the shift map.

  S1 = 1 indicates that the lowest gear stage that can be taken on the shift map is the first speed, and S1 = 2 indicates that the lowest gear stage that can be taken on the shift map is the second speed. S2 = 1 indicates that the highest gear position that can be taken on the shift map is the first speed, and S2 = 2 indicates that the highest gear stage that can be taken on the shift map is the second speed.

  Therefore, as is well known, the upshift in the D range is started when it enters the region of S1 = 2 and S2 = 2 beyond the 1-2 upshift line 56. On the other hand, the upshift in the paddle shift of the D range is permitted on the higher vehicle speed side than the 2-1 downshift line 58 of the shift map, that is, in the region of S1 = 1 and S2 = 2.

  The region 60 is a region where early upshifting is possible, and the paddle shift control in the D range enables early upshifting to meet the driver's request. In addition, by permitting upshifts on the higher vehicle speed side than the 2-1 downshift line 58, it is possible to prevent the driving force from being insufficient and the fuel consumption from being deteriorated due to a high gear at an extremely low vehicle speed. Yes.

  FIG. 9 shows the D-range paddle shift control operation region at the second gear. The 1-2 upshift line 56, the 2-1 downshift line 58, and the early upshiftable region 60 are the same as those in FIG.

  When the vehicle speed is less than # VDPDL2, a 3-2 downshift with a paddle switch is possible. When the vehicle speed is higher than # VDPDL2, downshift is not permitted because there is a possibility that engine overspeed may occur.

  This vehicle speed # VDPDL2 is set to a vehicle speed lower than the allowable downshift vehicle speed by the paddle switch operation in the S range. That is, the engine speed is set within a range that can prevent the engine from over-rotating with a margin.

  Reference numeral 62 denotes a second speed expansion region. When a 1-2 upshift is performed by a paddle switch operation in the D range, the second speed is maintained until the upshift switch 6a is pressed next time. .

  FIG. 10 shows the D-range paddle shift control operation region at the third speed. Reference numeral 64 denotes a 2-3 upshift line, and 66 denotes a 3-2 downshift line. The higher vehicle speed side than the 3-2 downshift line 66 is an early upshiftable region 68 according to the present invention.

  In order to prevent overspeed of the engine, the 4-3 downshift by the paddle switch 6b is allowed only when the vehicle speed is # VDPDL3 or less. Reference numeral 70 denotes a third speed expansion region. After the upshift to the third speed by pressing the paddle switch 6a, the third speed is maintained until the next upshift switch 6a is pressed.

  FIG. 11 shows the D-range paddle shift control operation region at the fourth speed. 72 is a 3-4 upshift line, 74 is a 4-3 downshift line, and the higher vehicle speed side than the 4-3 downshift line 74 is an early upshiftable region 76.

  In order to prevent engine overspeed, 5-4 downshift by the paddle switch 6b in the D range is permitted only when the vehicle speed is # VDPDL4 or less. Reference numeral 78 denotes a 4-speed enlargement area, and after the upshifting to the 4th speed by the paddle switch shift in the D range, the 4th speed is maintained until the paddle switch 6a is pushed next time.

  Next, the overall control of the D-range paddle shift according to the embodiment of the present invention will be described with reference to the flowcharts of FIGS. FIG. 12 is a flowchart showing a main routine of the shift control according to the present invention.

  First, in step S10, it is determined whether or not a downshift is being performed. If the determination is affirmative, the process proceeds to step S11 to execute SPDL (target shift stage by D paddle control) determination processing during downshift.

  If the determination in step S10 is negative, the process proceeds to step S12 to determine whether an upshift is being performed. If it is determined that the upshift is being performed, the process proceeds to step S13 to execute the SPDL determination process during the upshift.

  If the determination in step S12 is negative, the process proceeds to step S14 to determine whether or not the transmission is stationary. If the determination in step S14 is affirmative, the process proceeds to step S15 to execute the SPDL determination process at the normal time.

  On the other hand, if the determination in step S14 is negative and if the processes in steps S11, S13, and S15 are completed, the process proceeds to step S16 to execute a D paddle control release determination process.

  Next, details of the SPDL determination process in the steady state will be described with reference to the flowcharts of FIGS. 13 and 14. First, in step S20, it is determined whether or not there is an input from the downshift switch 6b.

  When there is an input from the downshift switch 6b, the process shifts to D paddle hold control. That is, the normal upshift characteristic line is displaced by a predetermined amount toward the high vehicle speed side, and when the running state of the vehicle is in a state where the upshift signal should be output, the output of the upshift signal is delayed for a predetermined time. When the vehicle continues to output the upshift signal after the delay time, one output of the upshift signal is permitted.

  When it is determined in step S20 that the downshift switch 6b is input, the process proceeds to step S21 to determine whether or not the first speed steady traveling is performed. If it is determined in step S21 that the vehicle is in the 1st speed steady running, the process proceeds to step S22 to determine whether the D paddle control in-progress flag is set, that is, whether the D paddle control is in progress.

  If it is determined that the D paddle control is not in progress, the process proceeds to step S24 to set a 7-segment display lighting timer for determining the display lighting time. In step S25, the 7-segment display lighting flag is set. “1” blinks on the 7-segment display provided in the display unit.

  If it is determined in step S22 that the D paddle control is being performed, the process proceeds to step S23, and the paddle shift target shift speed is overwritten on the current shift speed. That is, during steady driving at the 1st speed, a shift by operating the downshift switch 6b is not accepted regardless of whether the D paddle control is being performed.

  If it is determined in step S21 that the vehicle is not traveling in the first speed steady state, the process proceeds to step S26 to determine whether the vehicle speed is equal to or less than the specified vehicle speed. The specified vehicle speed is set to a different vehicle speed for each gear position. The specified vehicle speed is set to a vehicle speed that can prevent over-rotation of the engine when downshifting.

  If it is determined in step S26 that the vehicle speed is equal to or lower than the specified vehicle speed, downshifting is permitted, the process proceeds to step S27, the paddle shift target shift stage is overwritten with the current shift stage-1, and the paddle shift is being performed in step S28. Set the flag.

  On the other hand, if it is determined in step S26 that the vehicle speed is higher than the specified vehicle speed, the process proceeds to step S29 to determine whether or not the 7-segment display lighting flag is set, that is, whether or not the display is lit.

  If it is determined that the flag is set, the process proceeds to step S30 to overwrite the paddle shift target shift speed with the current shift speed, and in step S31, the 7-segment display flashing timer is set to flash the display. .

  On the other hand, if it is determined in step S29 that the 7-segment display lighting flag is not set, the paddle shift target shift speed is overwritten on the current shift speed in step S32.

  After the processing of step S23, step S28, step S31, and step S32, the process proceeds to step S33, the D paddle control in-progress flag is set, and the 7-segment display lighting flag is set.

  Next, the process proceeds to step S34 in FIG. 14 to determine whether or not there is an input of the upshift switch 6a. If it is determined that the input of the upshift switch 6a is present, the process proceeds to step S35 to determine whether or not the fifth speed steady traveling is performed.

  If it is determined that the vehicle is in the fifth speed steady running, the routine proceeds to step S36, where it is determined whether or not the D paddle control in-progress flag is set, that is, whether or not the D paddle control is in progress. If the D paddle control in-progress flag is not set, that is, if the D paddle control is not in progress, the process proceeds to step S38, the 7-segment display timer is set, and in step S39, the 7-segment display lighting flag is set. “5” blinks in the display.

  If it is determined in step S36 that the D paddle control in-progress flag is set, that is, if it is determined that D paddle control is in progress, the routine proceeds to step S37, where the paddle shift target shift stage is set to the current shift stage, that is, 5 Overwrite quickly.

  On the other hand, if it is determined in step S35 that the vehicle is not in the fifth speed steady running, the process proceeds to step S40 to determine whether or not it is an upshiftable region based on the shift map. That is, if S2 is the highest shift stage that can be taken on the shift map and SH is the current shift stage, it is determined whether or not S2 ≧ SH + 1.

  In the present embodiment, the early upshift possible region is expanded by allowing the upshift on the higher vehicle speed side than the downshift line of the shift map. If it is determined in step S40 that S2 ≧ SH + 1, the upshift is permitted, the process proceeds to step S41, the paddle shift target shift stage is overwritten with the current shift stage + 1, and the paddle shift in-progress flag is set in step S42. Set.

  If it is determined in step S40 that S2 <SH + 1, the upshift is not permitted. In this case, it is determined in step S43 whether or not the 7-segment display lighting flag is set.

  If it is determined that it has been set, the routine proceeds to step S44 where the paddle shift target shift stage is overwritten with the current shift stage, the 7-segment display blinking timer is set at step S45, and the current shift is displayed on the 7-segment display. Make the stage blink.

  On the other hand, if it is determined in step S43 that the 7-segment display lighting flag is not set, the process proceeds to step S46 to overwrite the paddle shift target shift speed with the current shift speed.

  After the process of step S37, step S42, step S45, and step S46 is completed, the process proceeds to step S47, the D paddle control in-progress flag is set, the 7-segment display lighting flag is set, and this process ends.

  Next, SPDL determination processing during upshift will be described with reference to the flowcharts of FIGS. 15 and 16. First, in step S50, it is determined whether or not there is an input of the downshift switch 6b.

  When there is an input from the downshift switch 6b, the process shifts to D paddle hold control. That is, the normal upshift characteristic line is displaced by a predetermined amount toward the high vehicle speed side, and when the running state of the vehicle is in a state where the upshift signal should be output, the output of the upshift signal is delayed for a predetermined time. When the vehicle continues to output the upshift signal after the delay time, one output of the upshift signal is permitted.

  If it is determined in step S50 that the downshift switch 6b has been input, the process proceeds to step S51 to determine whether the speed is equal to or less than the specified gear position. For example, the specified shift speed is set to the second speed. That is, if the downshift is permitted during the 1-2 upshift, the vehicle behavior becomes unstable, and the downshift is not permitted.

  If it is determined in step S51 that the speed is equal to or less than the specified level, the process proceeds to step S52 to determine whether the speed is equal to or lower than the specified vehicle speed. If it is determined that the vehicle speed is less than the specified vehicle speed, the process proceeds to step S53, and the paddle shift target gear position is overwritten with the current gear position. That is, the current gear position is maintained.

  If it is determined in step S52 that the vehicle speed is higher than the specified vehicle speed, the process proceeds to step S54 to determine whether the D paddle control in-progress flag is set, that is, whether the D paddle control is in progress.

  If the D paddle control is not being performed, the process proceeds to step S53. If it is determined that the D paddle control is being performed, the process proceeds to step S55, and the paddle shift target shift stage is overwritten with the current shift stage. That is, while maintaining the current gear position, a 7-segment display blinking timer is set in step S56, and the current gear position is blinked and displayed on the 7-segment display.

  If it is determined in step S51 that the gear position is higher than the specified gear position, the process proceeds to step S57 to determine whether the vehicle speed is equal to or less than the specified vehicle speed. This prescribed vehicle speed is set for each gear position as described in step S26 of FIG.

  If it is determined in step S57 that the vehicle speed is equal to or less than the specified vehicle speed, the process proceeds to step S58, and the paddle shift target shift speed is overwritten on the current shift speed-1. That is, downshift is permitted. In step S59, the paddle shifting flag is set.

  If it is determined in step S57 that the vehicle speed is greater than the specified vehicle speed, the downshift is not permitted in order to prevent engine overspeed. In this case, it is determined whether or not the 7-segment display lighting flag is set in step S60.

  That is, it is determined whether or not the 7-segment display is lit. If it is determined that the 7-segment display is lit, the process proceeds to step S61 and the paddle shift target shift stage is overwritten with the current shift stage. That is, the current gear position is maintained, a 7-segment display blinking timer is set in step S62, and the current gear position is blinked and displayed on the 7-segment display.

  If it is determined in step S60 that the 7-segment display lighting flag is not set, that is, if the 7-segment display is not lit, the process proceeds to step S63, and the paddle shift target shift speed is overwritten with the current shift speed. That is, the current gear position is maintained.

  After the processing of step S53, step S56, step S59, step S62, and step S63 is completed, the process proceeds to step S64, the D paddle control in-progress flag is set, and the 7-segment display lighting flag is set.

  Next, in step S65 of FIG. 16, it is determined whether or not there is an input of the upshift switch 6a. If it is determined that there is an input to the upshift switch 6a, the process proceeds to step S66 to determine whether or not the 4-5 upshift is currently being performed in the automatic shift mode.

  If it is determined that the 4-5 upshift is being performed, the process proceeds to step S67, and the paddle shift target shift speed is overwritten with the current shift speed. That is, during the upshift, the upshift by the paddle shift is not permitted.

  If it is determined in step S66 that the 4-5 upshift is not in progress, the process proceeds to step S68 to determine whether or not it is an upshiftable area based on the shift map. That is, it is determined whether S2 ≧ SH + 1.

  If it is determined in step S68 that the upshift is possible, the process proceeds to step S69 to overwrite the current shift speed with the paddle shift target shift speed. That is, even if it is determined that the upshift is possible, the upshift by the paddle switch 6a is not permitted during the upshift.

  If it is determined in step S68 that the region is not upshiftable, the process proceeds to step S70 to determine whether or not the 7-segment display lighting flag is set, that is, whether or not the 7-segment display is lit.

  If it is determined that the display is on, the paddle shift target gear is overwritten with the current gear in step S71, the 7-segment display blinking timer is set in step S72, and the 7-segment display is blinked at the current gear. Display.

  If it is determined in step S70 that the 7-segment display is not lit, the paddle shift target shift speed is overwritten with the current shift speed in step S73.

  After the processing of step S67, step S69, step S72, and step S73 is completed, the process proceeds to step S74, the D paddle control in-progress flag is set, the 7-segment display lighting flag is set, and this processing is terminated.

  Next, the SPDL determination process at the time of downshift will be described with reference to the flowcharts of FIGS. 17 and 18. First, in step S80, it is determined whether or not there is an input of the downshift switch 6b.

  When there is an input from the downshift switch 6b, the process shifts to D paddle hold control. That is, the normal upshift characteristic line is displaced by a predetermined amount toward the high vehicle speed side, and when the running state of the vehicle is in a state where the upshift signal should be output, the output of the upshift signal is delayed for a predetermined time. When the vehicle continues to output the upshift signal after the delay time, one output of the upshift signal is permitted.

  If it is determined in step S80 that there is an input from the downshift switch 6b, the process proceeds to step S81 to determine whether or not the current downshift is a downshift by a paddle switch operation.

  If the determination in step S81 is negative, it is an automatic downshift based on the shift map or the downshift by the paddle switch is waiting, and the process proceeds to step S82 to determine whether the paddle shift flag is set.

  If it is determined that the paddle shift flag is set, the downshift by the paddle switch is waiting, and if it is determined that the flag is not set, the downshift is performed in the automatic transmission mode. .

  If it is determined that the downshift is in the automatic transmission mode, the process proceeds to step S83 to determine whether or not the accelerator opening is equal to or less than a specified value. That is, it is determined whether or not the accelerator opening is close to the fully closed state. When it is determined that the accelerator opening is equal to or less than the specified value, the process proceeds to step S84, and the paddle shift target shift speed is overwritten with the current shift speed.

  If it is determined in step S81 that the current downshift is a downshift by the paddle switch operation, it is determined that the paddle switch is pressed twice, and the process proceeds to step S85 to determine whether or not it is a 2-1 downshift. To do. If it is determined to be 2-1 downshift, the process proceeds to step S86, and the paddle shift target shift stage is overwritten with the current shift stage, that is, the first speed.

  If step S85 is negative, the shift is any one of 3-2 downshift, 4-3 downshift, and 5-4 downshift. In this case, it progresses to step S87 and it is determined whether it is below a regulation vehicle speed. The prescribed vehicle speed is a vehicle speed that can prevent over-rotation of the engine when downshifted, and is prescribed for each gear position as described in step S26 of FIG.

  If it is determined in step S87 that the vehicle speed is equal to or less than the specified vehicle speed, the process proceeds to step S88 to determine whether or not a 3-2 downshift is performed. If it is determined that the shift is 3-2 downshifting, the process proceeds to step S89, where the paddle shift target shift speed is overwritten with the current shift speed and the second speed. That is, the 3-1 downshift by pressing the paddle switch 6b twice is not permitted because the behavior change of the vehicle body may increase.

  On the other hand, when the determination in step S88 is negative, it is a 4-3 downshift and a 5-4 downshift, and the process proceeds to step S90 to determine whether the current vehicle speed is equal to or lower than the vehicle speed at the time of the first downshift. When step S90 is affirmation determination, it progresses to step S91 and it is determined whether an accelerator opening is below a regulation value.

  If it is determined in step S91 that the accelerator opening is equal to or less than the specified value, the process proceeds to step S92, and the paddle shift target shift stage is overwritten on the current shift stage-1. That is, 4-2 downshift or 5-3 downshift is permitted. In step S93, a paddle shift in-progress flag is set.

  If it is determined in step S90 that the vehicle speed is higher than the specified vehicle speed, or if it is determined in step S91 that the accelerator opening is greater than the specified value, the current shift speed is overwritten with the paddle shift target shift speed in step S89. To do.

  On the other hand, if it is determined in step S87 that the vehicle speed is higher than the specified vehicle speed, the downshift by the paddle switch is not permitted, and the paddle shift target shift speed is overwritten on the current shift speed in step S94.

  After the processing of step S84, step S86, step S89, step S93, and step S94 is completed, the process proceeds to step S95, the D paddle control in-progress flag is set, and the 7-segment display lighting flag is set.

  Next, the process proceeds to step S96 of FIG. 18 to determine whether or not there is an input of the upshift switch 6a. If it is determined that there is an input to the upshift switch 6a, the process proceeds to step S97 to determine whether or not the current downshift is a downshift due to an operation of the downshift switch 6b.

  If the determination in step S97 is negative, the current downshift is an automatic downshift based on a shift map, or a downshift is being waited for by a paddle switch operation. In this case, the routine proceeds to step S98, where it is determined whether or not the paddle shifting flag is set.

  If the determination in step S98 is negative, it is determined that the downshift is in the automatic transmission mode, and the process proceeds to step S99 to determine whether or not the accelerator opening is equal to or less than a specified value. That is, it is determined whether or not the accelerator opening is nearly fully closed. If it is determined that the accelerator opening is equal to or less than the specified value, the upshift is not permitted and the routine proceeds to step S100 where the paddle shift target shift speed is overwritten on the current shift speed.

  If it is determined in step S98 that the paddle shift in-progress flag is set, it is determined that the paddle switch is in the downshift wait state, and the upshift is not permitted, and the routine proceeds to step S101 and the paddle shift is performed. Overwrites the target gear to the current gear.

  On the other hand, if it is determined in step S97 that the current downshift is a downshift by a paddle switch operation, the process proceeds to step S102 to determine whether or not it is an upshiftable area based on the shift map. That is, it is determined whether S2 ≧ SH + 1.

  If it is determined in step S102 that the upshift is possible, the process proceeds to step S103, and the paddle shift target shift speed is overwritten with the current shift speed +1. That is, for example, a process of returning to the fourth speed at the time of 4-3 downshift is performed here. Next, in a step S104, a paddle shift in-progress flag is set.

  If it is determined in step S102 that the region is not in the upshiftable region, the upshift is not permitted, the process proceeds to step S105, the paddle shift target gear is overwritten on the current gear, and the 7-segment display blinking timer in step S106. Is set and the 7-segment display blinks at the current gear position.

  After the processing of step S100, step S101, step S104, and step S106 is completed, the D paddle control in-progress flag is set in step S107, the 7-segment display lighting flag is set, and this processing ends.

  Next, the D paddle control release determination process will be described with reference to the flowchart of FIG. First, in step S110, it is determined whether or not there is an input from the upshift switch 6a or the downshift switch 6b.

  If it is determined that there is no input, the process proceeds to step S111 to determine whether or not D paddle control is being performed, that is, whether or not a flag during D paddle control is set. If it is determined in step S111 that the D paddle control in-progress flag is set, the process proceeds to step S112 to determine whether or not the timer 1 has elapsed a predetermined time.

  This timer 1 is a control release timer when reaching the highest stage, and is set to a predetermined time every time Steps S112 and S123 described later are executed. In the present embodiment, the highest stage is the fifth speed. When the timer 1 has not elapsed in step S112, the process proceeds to step S113, where it is determined whether the accelerator opening is equal to or less than a specified value.

  If it is determined in step S113 that the accelerator opening is larger than the specified value, that is, if it is determined that the accelerator is on, the routine proceeds to step S114, where it is determined whether or not the vehicle speed change amount (ΔV) is within the specified range. .

  When it is determined that the change amount of the vehicle speed is within the specified range, the routine proceeds to step 115, where it is determined whether or not the throttle change amount is within the specified range. If it is determined that the throttle change amount is within the specified range, the process proceeds to step S116, where it is determined whether the timer 2 has elapsed a predetermined time.

  This timer 2 is a control cancellation timer for cruise conditions. When step S113 is affirmative, step S114 is negative, or when step S115 is negative, the process proceeds to step S118 and timer 2 is set. .

  That is, when the accelerator opening is larger than the specified value, the change amount of the vehicle speed is within the specified range, and the throttle change amount is within the specified range, it is determined that the cruise is running, and the timer 2 is specified after the cruise is started. When the predetermined time has elapsed, the process proceeds to step S117, the D paddle control in-progress flag and the D paddle control related parameters are reset, and the automatic shift mode is entered.

  Even when it is determined in step S112 that the timer 1 has elapsed, the process proceeds to step S117 to release the D paddle control. That is, when the predetermined time specified by the timer 1 has elapsed after reaching the highest stage, the D paddle control is released. Steps S110 to S118 described above constitute a D paddle control release determination unit.

  If the determination in step S110 is affirmative, or after the processing in step S117 or step S118 ends, the process proceeds to step S119 to determine whether the D paddle control in-progress flag is set, that is, whether the D paddle control is in progress.

  If it is determined in step S119 that the D paddle control is being performed, the process proceeds to step S120, and it is determined whether there is an input from the upshift switch 6a or the downshift switch 6b.

  If it is determined in step S120 that there is no input from the upshift switch 6a or the downshift switch 6b, the process proceeds to step S121 to determine whether or not the maximum gear stage has been reached.

  If the maximum gear (5th speed in this embodiment) has not been reached, the timer 1 is set to a predetermined time in step S122. If it is determined in step S121 that the maximum gear has been reached, the process returns.

  On the other hand, if it is determined in step S120 that the input of the upshift switch 6a or the downshift switch 6b is present, the process proceeds to step S123 and the timer 1 is set to a predetermined time.

  If it is determined in step S119 that the D paddle control is not being performed, the process proceeds to step S124 and the timer 1 is reset. Steps S119 to S124 constitute a D paddle control cancellation timer set / reset determination unit after reaching the fifth speed.

It is a figure which shows the shift position of a shift lever. It is a figure which shows the paddle switch provided in the steering wheel. 3A is a display example of the meter portion of the S range paddle shift, and FIG. 3B is a diagram illustrating a display example of the meter portion of the D range paddle shift. 1 is a schematic system configuration diagram of a shift control device according to an embodiment of the present invention. It is explanatory drawing explaining the outline | summary of D range paddle shift control. It is a first principle block diagram showing the principle of the present invention. It is a 2nd principle block diagram which shows the principle of this invention. It is a shift map explaining the upshift permission area | region in D paddle shift control. It is a shift map which shows the D range paddle shift control operation area | region in 2nd speed. It is a shift map which shows the D range paddle shift control operation area | region in 3rd speed. It is a shift map which shows the D range paddle shift control operation area | region in 4th speed. It is a flowchart which shows the main routine of D range paddle shift control of this invention. It is a flowchart which shows constant-time SPDL (target gear stage by D paddle control) determination processing. It is a flowchart which shows regular SPDL determination processing. It is a flowchart which shows the SPDL determination process during an upshift. It is a flowchart which shows the SPDL determination process during an upshift. It is a flowchart which shows the SPDL determination process during a downshift. It is a flowchart which shows the SPDL determination process during a downshift. It is a flowchart which shows D range paddle shift control cancellation | release determination processing.

Explanation of symbols

6 Paddle Switch 6a Upshift Switch 6b Downshift Switch 34 D Range 36 Automatic Shift Mode 38 Manual Shift Mode 40 Region Determination Unit 42 Upshift Permit Unit 44 S Range 46 First Manual Shift Mode 48 Vehicle Speed Determination Unit 50 Downshift Permit Unit 52 First area determination means 54 Second area determination means

Claims (1)

An automatic shift mode in which a shift stage or a gear ratio to be set is determined based on the accelerator opening and the vehicle speed and a shift operation is performed, and a shift operation instructed by the driver is performed based on the driver 's manual operation and the vehicle speed. In a shift control device for an automatic transmission having a manual shift mode,
The manual shift mode is
A first manual shift mode in which a driver selects a manual shift range position and performs a shift operation instructed by operating an upshift switch or a downshift switch;
A second manual shift mode in which a driver selects an automatic shift range position and performs a shift operation instructed by an operation of the upshift switch or the downshift switch;
The shift control device includes:
Vehicle speed determination means for comparing the current vehicle speed with a predetermined vehicle speed set in advance to determine whether the current vehicle speed is lower than the predetermined vehicle speed;
When a downshift is instructed by the driver's manual operation, if it is determined by the vehicle speed determining means that the vehicle is in the area, a downshift permission means for permitting the downshift is provided,
A shift control device for an automatic transmission, wherein the predetermined vehicle speed in the second manual shift mode is set to a vehicle speed lower than the predetermined vehicle speed in the first manual shift mode.

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