JP4897843B2 - Vehicle speed change control device - Google Patents

Description

  The present invention provides a shift lever capable of selecting a first travel range and a second travel range of an automatic transmission, a shift position sensor for detecting a travel range selected by the shift lever, and the automatic transmission according to a driver's operation. And a shift control means for switching the shift stage of the automatic transmission, the automatic shift mode and the manual shift mode based on the driving state of the vehicle, the output signal of the shift position sensor and the output signal of the shift switch The present invention relates to a vehicular transmission control device.

  The four positions of the H pattern intersecting the I pattern at the D range position, with the P, R, N, D, S, and L range positions for automatic transmission selectable by the shift lever arranged along the I pattern The 1st, 2nd, 3rd and 4th shift positions for manual transmission are arranged on the left side, the automatic shift mode is selected by moving the shift lever along the I pattern, and the shift lever is moved to the H pattern. A control device for an automatic transmission that selects a manual transmission mode by moving along a gear is known from Japanese Patent Application Laid-Open Publication No. 2005-228707.

  In this automatic transmission control device, the shift lever is set to the first speed, the second speed, the third speed so that the manual shift mode is not immediately switched to the automatic shift mode when the shift lever crosses the D range position of the I pattern in the manual shift mode. The time spent on the H pattern away from the shift position of the 4th and 4th speed, or the time existing in the D range position of the I pattern is counted by a timer, and when the time exceeds the predetermined value, the driver manually shifts It is determined that there is an intention to switch from the mode to the automatic transmission mode, and the switching is performed when the throttle opening or the vehicle speed changes.

Japanese Patent No. 2947544

  By the way, in the above-mentioned conventional one, the driver changes from the manual shift mode to the automatic shift mode based on the time that the shift lever is away from the 1st, 2nd, 3rd and 4th shift positions of the H pattern in the manual shift mode. If the driver does not operate the shift lever smoothly, the timer counts up even though the driver did not intend. Therefore, there is a possibility that the manual transmission mode is switched to the automatic transmission mode.

  The present invention has been made in view of the above-described circumstances, and an object of the present invention is to reliably prevent the automatic transmission from being switched from the manual transmission mode to the automatic transmission mode unintended by the driver in the automatic transmission.

  To achieve the above object, according to the first aspect of the present invention, a shift lever capable of selecting a first travel range and a second travel range of an automatic transmission, and a travel range selected by the shift lever. A shift position sensor for detecting the automatic transmission, a shift switch capable of manually shifting the automatic transmission by a driver's operation, a driving state of the vehicle, an output signal of the shift position sensor, and an output signal of the shift switch based on the automatic transmission And a shift control means for switching between the automatic shift mode and the manual shift mode. The shift control means is configured to detect the shift position sensor during travel in the manual shift mode of the first travel range. The output signal of The automatic transmission is connected to the first travel range when the currently established gear position in the first travel range matches the gear position corresponding to the current driving state of the vehicle in the second travel range. A vehicle shift control device is proposed in which the manual shift mode is switched to the automatic shift mode of the second travel range.

  According to the invention described in claim 2, a shift lever capable of selecting the first travel range and the second travel range of the automatic transmission, a shift position sensor for detecting the travel range selected by the shift lever, A shift switch capable of manually shifting the automatic transmission by a driver's operation, a driving state of the vehicle, an output signal of the shift position sensor, and an output signal of the shift switch, an automatic shift mode of the automatic transmission And a shift control means for switching the manual shift mode, wherein the shift control means is configured to stop the output signal of the shift position sensor during travel in the manual shift mode of the first travel range. , The automatic mat Switching the automatic transmission from the manual shift mode of the first travel range to the automatic shift mode of the second travel range when a condition that the gear position of the transmission is equal to or less than a predetermined value or the vehicle speed is equal to or less than a predetermined value is satisfied. A vehicle speed change control device is proposed.

  The paddle switch Sb of the embodiment corresponds to the shift switch of the present invention, and the electronic control unit U of the embodiment corresponds to the shift control means of the present invention.

  According to the configuration of the first aspect, when the driver operates the shift switch while driving in the automatic shift mode by selecting the first travel range or the second travel range of the automatic transmission with the shift lever, the automatic shift mode is set. Is switched to the manual shift mode, and traveling at an arbitrary shift stage is possible. When the output signal of the shift position sensor that detects the travel range is interrupted during travel in the manual shift mode of the first travel range, the conventional method switches to the automatic shift mode of the second travel range unconditionally. When the shift speed currently established in the first travel range matches the shift speed corresponding to the current driving state of the vehicle in the second travel range, the second travel is performed from the manual shift mode in the first travel range. Since the automatic shift mode in the range is switched, the shift stage is prevented from changing due to the switch. Thereby, it is possible to prevent a shift change unintended by the driver from occurring, and to prevent the vehicle behavior from being disturbed and the driver from feeling uncomfortable.

  According to the second aspect of the present invention, when the driver operates the automatic transmission mode when the shift lever selects the first traveling range or the second traveling range of the automatic transmission and operates the automatic transmission mode, the automatic transmission is performed. The mode is switched from the manual shift mode to traveling at an arbitrary shift stage. When the output signal of the shift position sensor that detects the travel range is interrupted during travel in the manual shift mode of the first travel range, the conventional method switches to the automatic shift mode of the second travel range unconditionally. The automatic transmission mode is switched from the manual transmission mode in the first traveling range to the automatic transmission mode in the second traveling range when the condition that the gear position of the automatic transmission is less than the predetermined value or the vehicle speed is less than the predetermined value is satisfied. It is prevented that the gear position is changed. Thereby, it is possible to prevent a shift change unintended by the driver from occurring, and to prevent the vehicle behavior from being disturbed and the driver from feeling uncomfortable.

Explanatory drawing (1st Embodiment) of switching of D range and S range of an automatic transmission. The block diagram of the control system of an automatic transmission (1st Embodiment). The flowchart explaining 1st Embodiment (1st Embodiment). The flowchart explaining operation | movement (2nd Embodiment).

  Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings.

  1 to 3 show a first embodiment of the present invention. FIG. 1 is a diagram for explaining switching of a D range and an S range of an automatic transmission. FIG. 2 is a block diagram of a control system of the automatic transmission. Is a flowchart explaining the operation.

  As shown in FIGS. 1 and 2, the shift lever L of the automatic transmission T can select a P range, an R range, an N range, a D range, and an S range by a driver's operation. When the shift lever L is in the D range, the electronic control unit U searches the shift stage from the D range shift map using the vehicle speed detected by the vehicle speed sensor Sc and the throttle opening detected by the throttle opening sensor Sd as parameters. By outputting a shift command signal to the automatic transmission T so as to establish this shift stage, traveling in the normal automatic shift mode becomes possible. In addition, when the shift lever L is in the D range and the automatic shift described above is performed, a manual shift such as a manual transmission is possible when the driver operates a paddle switch Sb provided on a steering wheel (not shown). Transition to manual shift mode.

  That is, every time the driver presses the paddle switch Sb for upshifting, the gear stage is shifted up by one stage, and every time the driver presses the paddle switch Sb for downshifting, the gear stage is shifted down by one stage. Thus, it is possible to travel by selecting an arbitrary gear position. However, the operation of the paddle switch Sb is ignored when the engine speed enters the red zone at a gear position that is switched by the operation of the paddle switch Sb, or when the engine stalls.

  When it is determined that the vehicle has shifted to the cruise state after the driver has last operated the paddle switch Sb, the manual shift mode described above returns to the normal automatic shift mode.

  Even when the shift lever L is in the S range, the electronic control unit U uses the vehicle speed detected by the vehicle speed sensor Sc and the throttle opening detected by the throttle opening sensor Sd as parameters to shift from the S range shift map. And a shift command signal is output to the automatic transmission T in order to establish this shift stage, thereby enabling traveling in the automatic shift mode. However, in the S range, the updrive to the maximum gear position is prohibited by the overdrive OFF function.

  Further, when the driver operates the paddle switch Sb when the shift lever L is in the S range and the automatic shift described above is performed, the manual operation such as a manual transmission is performed by operating the paddle switch Sb as in the case of the D range. The mode shifts to a manual shift mode in which shifting is possible. However, in the S range, even if it is determined that the vehicle has shifted to the cruise state, the automatic transmission mode is not restored and the manual transmission mode is maintained.

  As is apparent from FIG. 1, switching between the automatic transmission mode for the D range, the manual transmission mode for the D range, the automatic transmission mode for the S range, and the manual transmission mode for the S range is performed as follows.

  When the paddle switch Sb is operated from the automatic transmission mode of the D range, it is possible to switch to the manual transmission mode of the D range, and when the paddle switch Sb is operated from the automatic transmission mode of the S range, it is possible to switch to the manual transmission mode of the S range. Switching from the D range to the S range is possible by operating the shift lever L to the S range in any of the manual transmission mode and the automatic transmission mode of the D range. Switching from the S range to the D range can be performed by operating the shift lever L to the D range regardless of whether the S range is in the automatic transmission mode or the manual transmission mode.

  By the way, when the driver puts his hand on the shift lever L in order to switch to the D range while traveling in the manual shift mode of the S range, the driver has not yet performed the switching operation to the D range. However, the detection signal of the shift position sensor Sa that has detected the S range due to the force applied to the shift lever L may be turned OFF.

  In such a case, since the control is conventionally performed so as to unconditionally switch to the automatic transmission mode of the D range, a shift change is made from the gear range of the manual transmission mode of the S range to the gear stage of the automatic transmission mode of the D range. This unexpected shift change may not only disturb the vehicle behavior and make the driver feel uncomfortable, but the torque converter lock-up clutch is disengaged and a shock occurs. The fuel consumption rate may increase.

  The above-described problem may also occur when an abnormality such as a contact failure occurs in the shift position sensor Sa and the detection signal of the shift position sensor Sa that has detected the S range is turned OFF.

  Therefore, in this embodiment, the following control is performed to solve the above problem.

In the flowchart of FIG. 3, first, when the shift position sensor Sa does not detect the S range in step S1, the manual shift mode permission flag F is determined in step S2. SURET is reset to “0”. Manual shift mode permission flag F When SURET is “1”, the manual shift mode of the S range is permitted, and the manual shift mode permission flag F When SURET is “0”, the manual shift mode in the S range is prohibited.

In step S1, the shift position sensor Sa detects the S range, and in step S1A, the manual shift mode permission flag F When SURET is “0”, when a shift-up or shift-down command by the paddle switch Sb is not input in step S3, the manual shift mode permission flag F is set in step S2. SURET is reset to “0”.

In step S1A, manual shift mode permission flag F When SURET is “1”, or when a shift-up or shift-down command is input by the paddle switch Sb in step S3, S of the shift position sensor Sa is caused by hand on the shift lever L or the like in step S4. If contact OFF does not occur, manual shift mode permission flag F is determined in step S5. SURET is set to “1”, the automatic transmission mode of the S range is switched to the manual transmission mode, and the shift change by the driver's operation of the paddle switch Sb becomes possible.

  If the S contact of the shift position sensor Sa is turned OFF for some reason contrary to the driver's intention in step S4, the current vehicle speed detected by the vehicle speed sensor Sc and the throttle opening sensor Sd in the D range shift map in step S6. And the throttle opening degree is applied, and the shift stage SFTD in the D range is searched. The shift stage SFTD in the D range corresponds to a shift stage established in the automatic shift mode in the D range when it is assumed that the shift range is changed to the D range in the current driving state of the vehicle.

In subsequent step S7, if the shift stage SFTD in the D range does not coincide with the currently established shift stage GRATIO, the process proceeds to step S5 and the manual shift mode in the S range is continued. If the gear position in the D range matches the currently established gear position GRATIO in step S7, the manual shift mode permission flag F is determined in step S2. Since SURET is reset to “0” and the manual shift mode of the S range is prohibited, the shift to the automatic shift mode of the D range is performed.

  In other words, if the S contact of the shift position sensor Sa is turned OFF for some reason against the will of the driver while traveling in the S range manual transmission mode, the D range is maintained at the current vehicle speed and throttle opening. Only when there is no shift change when the automatic transmission mode is switched, the S-range manual transmission mode is switched to the D-range automatic transmission mode. As well as preventing the torque converter lockup clutch from being disengaged unnecessarily and causing shocks or increased fuel consumption. it can.

  Next, a second embodiment of the present invention will be described with reference to FIG.

First, when the shift position sensor Sa does not detect the S range in step S11, the manual shift mode permission flag F in step S12. SURET is reset to “0”. Manual shift mode permission flag F When SURET is “1”, the manual shift mode of the S range is permitted, and the manual shift mode permission flag F When SURET is “0”, the manual shift mode in the S range is prohibited.

In step S11, the shift position sensor Sa detects the S range, and in step S11A, the manual shift mode permission flag F When SURET is “0”, when a shift-up or shift-down command by the paddle switch Sb is not input in step S13, the manual shift mode permission flag F is set in step S2. SURET is reset to “0”.

In step S11A, manual shift mode permission flag F When SURET is “1”, or when a shift-up or shift-down command is input by the paddle switch Sb in step S13, S of the shift position sensor Sa is detected by stepping on the shift lever L in step S14. If contact OFF does not occur, manual shift mode permission flag F is determined in step S15. SURET is set to “1”, the automatic transmission mode of the S range is switched to the manual transmission mode, and the shift change by the driver's operation of the paddle switch Sb becomes possible.

  The control so far is the same as in the first embodiment described above.

  If the S contact of the shift position sensor Sa is turned OFF for some reason contrary to the driver's intention in the step S14, the currently established shift speed in the step S16 is a predetermined shift speed (first speed shift speed in the embodiment). If not, the process proceeds to step S15 to continue the manual shift mode in the S range.

If the speed currently established in step S16 is equal to or lower than the predetermined speed (that is, the first speed), the manual shift mode permission flag F is determined in step S12. Since SURET is reset to “0” and the manual shift mode of the S range is prohibited, the shift to the automatic shift mode of the D range is performed.

  Thus, when the vehicle is traveling in the S-range manual shift mode, if the S contact of the shift position sensor Sa is turned OFF for some reason against the driver's will, the current shift stage is the lowest shift stage. Only in the case of a certain first gear, the manual shift mode is switched to the D range automatic shift mode in the S range. When the first gear is established, the vehicle speed is low, and there is no possibility of shifting down to lower gears. Therefore, even if the manual shift mode is switched from the S range to the automatic shift mode of the D range, a shift shock occurs. There is no risk of sudden changes in vehicle speed, and it is possible to prevent disturbance of vehicle behavior and driver discomfort due to unintended shift changes.

  The embodiments of the present invention have been described above, but various design changes can be made without departing from the scope of the present invention.

  For example, in the embodiment, the stepped type is exemplified as the automatic transmission T, but the present invention can also be applied to a CVT (non-transmission). CVT does not have a “shift stage” like a stepped transmission, but the present invention can be applied by setting a virtual shift stage according to the gear ratio.

  In the second embodiment, switching from the S range manual shift mode to the D range automatic shift mode is permitted when the current shift step is the first gear, but the current shift step is 2 Switching from the manual shift mode in the S range to the automatic shift mode in the D range may be permitted when the speed is lower than the speed.

  In the second embodiment, switching from the manual shift mode in the S range to the automatic shift mode in the D range is permitted when the current shift speed is equal to or lower than the predetermined shift speed, but the current vehicle speed is a predetermined value. In the case of (for example, 10 km / h) or less, switching from the S range manual shift mode to the D range automatic shift mode may be permitted.

Sa Shift position sensor Sb Paddle switch (shift switch)
L Shift lever T Automatic transmission U Electronic control unit (shift control means)

Claims (2)

A shift lever (L) capable of selecting a first travel range and a second travel range of the automatic transmission (T);
A shift position sensor (Sa) for detecting a travel range selected by the shift lever (L);
A shift switch (Sb) capable of manually shifting the automatic transmission (T) by a driver's operation;
Shift control means for switching the shift stage, automatic shift mode and manual shift mode of the automatic transmission (T) based on the driving state of the vehicle, the output signal of the shift position sensor (Sa) and the output signal of the shift switch (Sb) (U) and
In a vehicle transmission control device comprising:
The shift control means (U)
When the output signal of the shift position sensor (Sa) is interrupted during traveling in the manual shift mode of the first traveling range,
When the shift speed currently established in the first travel range matches the shift speed corresponding to the current driving state of the vehicle in the second travel range, the automatic transmission (T) is moved to the first travel range. A vehicular shift control device that switches from a manual shift mode of a range to an automatic shift mode of the second travel range. A shift lever (L) capable of selecting a first travel range and a second travel range of the automatic transmission (T);
A shift position sensor (Sa) for detecting a travel range selected by the shift lever (L);
A shift switch (Sb) capable of manually shifting the automatic transmission (T) by a driver's operation;
Shift control means for switching the shift stage, automatic shift mode and manual shift mode of the automatic transmission (T) based on the driving state of the vehicle, the output signal of the shift position sensor (Sa) and the output signal of the shift switch (Sb) (U) and
In a vehicle transmission control device comprising:
The shift control means (U)
When the output signal of the shift position sensor (Sa) is interrupted during traveling in the manual shift mode of the first traveling range,
The automatic transmission (T) is moved from the manual shift mode of the first travel range to the second travel range when a condition that the gear position of the automatic transmission (T) is a predetermined value or less or the vehicle speed is a predetermined value or less is satisfied. A shift control apparatus for a vehicle characterized by switching to the automatic shift mode.

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