JP2020079046A - Supercharging pressure display device - Google Patents

Abstract

To provide a supercharging pressure display device that can suppress fuel efficiency from deteriorating due to excessive accelerator stepping-in resulting from false recognition of a driver.SOLUTION: The supercharging pressure display device of a vehicle comprises; an engine provided with a supercharger; an automatic transmission that changes rotation outputted from the engine at a predetermined variable speed level, then transmits the rotation to a driving wheel and is brought into a non-transmission state where the transmission does not temporarily transmit rotation outputted from the engine to the driving wheel during speed changing during which the variable speed level is switched; a supercharging pressure detection part that detects supercharging pressure of the engine caused by the supercharger; and a meter, which further comprises an ECM that calculates supercharging pressure for display by which annealing processing for suppressing variation of detected values of the supercharging pressure is performed and then the processing is displayed on a meter, where the ECM sets an annealing coefficient for the annealing processing to be smaller during speed change by the automatic transmission in comparison with when the speed change is not started.SELECTED DRAWING: Figure 3

Description

  The present invention relates to a boost pressure display device.

  Conventionally, in an intake pressure gauge that displays the intake pressure of a vehicle engine, in the negative pressure display area, the movement of the pointer of the pointer type display unit is made a stepwise operation, and in the positive pressure display area, the pointer is smoother than the negative pressure display area. Patent Document 1 discloses a technique capable of confirming the driving condition at the present time without causing the vehicle driver to read the scale of the sentence plate on the pointer-type display unit.

JP, 10-148544, A

  However, in the conventional technique as described above, since the engine speed is controlled to the synchronous speed of the target shift stage during the gear shift, the engine speed greatly changes, and the intake pressure greatly decreased due to the change of the engine speed. Displayed on the intake pressure gauge.

  Further, in a vehicle equipped with an automatic transmission such as an AMT (Automated Manual Transmission), it is necessary to cut off the transmission of power between the engine and the drive wheels when shifting gears. Therefore, while the power transmission during the shift is temporarily interrupted, the engine speed changes greatly, and the intake pressure greatly decreased due to the change in the engine speed is displayed on the intake pressure gauge.

  If the intake pressure displayed on the intake pressure gauge drops significantly, the driver will misunderstand that the driving force of the vehicle is insufficient because the boost pressure has decreased, and the driver will step on the accelerator excessively. .. As a result, the conventional technique has a problem in that fuel is supplied to the engine in an amount corresponding to the excessively depressed amount of the accelerator, which deteriorates fuel efficiency.

  The present invention is made in view of the above-mentioned problems, and provides a supercharging pressure display device capable of suppressing deterioration of fuel efficiency due to excessive accelerator pedal depression due to erroneous recognition by a driver. With the goal.

  A supercharging pressure display device according to the present invention for solving the above-mentioned problems, an engine provided with a supercharger, and a rotation output from the engine are transmitted to a drive wheel by shifting at a predetermined shift speed, During a speed change to shift the gear, an automatic transmission that is in a non-transmission state in which the rotation output from the engine is not temporarily transmitted to the drive wheels, and a supercharger that detects supercharging pressure of the engine by the supercharger. A supercharging pressure display device for a vehicle, comprising: a supercharging pressure detection unit; and a display device, wherein the supercharging pressure detection unit performs a smoothing process for suppressing fluctuations in a detection value of the supercharging pressure detection unit and displays the result on the display device. A control unit that calculates a supercharging pressure for display is provided, and during control of the automatic transmission, the control unit increases the moderation degree of the smoothing process as compared with before the start of the shift.

  INDUSTRIAL APPLICABILITY The present invention can provide a supercharging pressure display device capable of suppressing deterioration of fuel efficiency due to excessive accelerator pedal depression due to driver's erroneous recognition.

FIG. 1 is a functional configuration diagram showing a main part of a vehicle provided with a boost pressure display device according to an embodiment of the present invention. FIG. 2 is a flowchart showing a supercharging pressure display operation of the supercharging pressure display device according to the embodiment of the present invention. FIG. 3 is a timing chart for explaining the operation during upshift of the supercharging pressure display device according to the embodiment of the present invention. FIG. 4 is a timing chart for explaining the operation during downshift of the supercharging pressure display device according to the embodiment of the present invention.

  A supercharging pressure display device according to an embodiment of the present invention, an engine provided with a supercharger, and the rotation output from the engine is transmitted at a predetermined gear speed and transmitted to a drive wheel to change the gear speed. An automatic transmission that is in a non-transmission state in which the rotation output from the engine is not temporarily transmitted to the drive wheels during the gear shift to be switched, and a supercharging pressure detection unit that detects supercharging pressure of the engine by the supercharger, A supercharging pressure display device for a vehicle, comprising: a display device, wherein a supercharging pressure for display to be displayed on the display device is calculated by performing a smoothing process for suppressing fluctuations in a detection value of the supercharging pressure detection unit. A control unit is provided, and during the shift of the automatic transmission, the control unit increases the smoothing degree of the smoothing process as compared with before the shift is started. As a result, the supercharging pressure display device according to the embodiment of the present invention can suppress deterioration of fuel efficiency due to excessive accelerator pedal depression due to erroneous recognition by the driver.

  Hereinafter, a vehicle equipped with a boost pressure display device according to an embodiment of the present invention will be described with reference to the drawings.

  As shown in FIG. 1, a vehicle 1 includes an engine 2 as an internal combustion engine, a transmission 3, a drive wheel 5, an ECM (Engine Control Module) 11 that controls the engine 2, and a TCM that controls the transmission 3. (Transmission Control Module) 12 and.

  The engine 2 is formed with a plurality of cylinders. In this embodiment, the engine 2 is configured to perform a series of four strokes including an intake stroke, a compression stroke, an expansion stroke and an exhaust stroke for each cylinder. The engine 2 transmits the power generated by performing a series of four strokes to the transmission 3 via the crankshaft 18.

  An intake pipe 59 is connected to the engine 2. An intake passage is formed inside the intake pipe 59 for introducing air that has flowed in from the outside of the vehicle into the combustion chamber of the engine 2. An atmospheric pressure sensor 80, a throttle valve 14, and a boost pressure sensor 13 are provided in the intake passage.

  The atmospheric pressure sensor 80 detects atmospheric pressure. The atmospheric pressure sensor 80 is connected to the ECM 11. The throttle valve 14 adjusts the amount of air introduced into the combustion chamber of the engine 2 by being driven by an actuator that operates according to the control of the ECM 11.

  The supercharging pressure sensor 13 detects the intake pressure in the intake passage downstream of the supercharger 17 in the intake direction. The supercharging pressure sensor 13 is connected to the ECM 11. The intake direction is a direction in which air flowing from the outside of the vehicle flows in the intake passage toward the engine 2. In the present embodiment, the difference between the intake pressure detected by the supercharging pressure sensor 13 and the atmospheric pressure detected by the atmospheric pressure sensor 80 is defined as “supercharging pressure”. Therefore, the supercharging pressure sensor 13 and the atmospheric pressure sensor 80 of the present embodiment constitute a supercharging pressure detection unit. The intake pressure detected by the supercharging pressure sensor 13 may be referred to as “supercharging pressure”. In this case, the boost pressure sensor 13 constitutes a boost pressure detection unit.

  An exhaust pipe 60 is connected to the engine 2. Inside the exhaust pipe 60, an exhaust passage for discharging the exhaust gas discharged from the engine 2 to the outside is formed. A supercharger 17 is provided in the intake passage and the exhaust passage.

  The supercharger 17 includes a turbine 16, a compressor 15, a wastegate valve 28, and an intercooler 24. The turbine 16 is provided in the exhaust passage and is rotationally driven by the exhaust gas of the engine 2.

  The compressor 15 is rotationally driven integrally with the turbine 16 to compress the outside air and send the compressed outside air into the intake passage. The intercooler 24 cools the outside air that has been compressed by the compressor 15 and has increased in temperature.

  The waste gate valve 28 is driven by an actuator that operates according to the control of the ECM 11, and thereby adjusts the amount of exhaust gas discharged through the turbine 16 and adjusts the drive state of the turbine 16.

  Specifically, the wastegate valve 28 determines the ratio between the amount of exhaust gas discharged through the turbine 16 and the amount of exhaust gas discharged through an exhaust bypass passage 29 formed in the exhaust passage so as not to pass through the turbine 16. adjust.

  The transmission 3 shifts the rotation output from the engine 2 at a gear ratio according to the shift speed, and drives the drive wheels 5 via the drive shaft 23. The transmission 3 includes a constant mesh type transmission mechanism 25 including a parallel shaft gear mechanism, a clutch 26 including a dry single plate clutch, a differential mechanism 27, a clutch actuator 51, and a shift actuator 52. There is.

  The clutch actuator 51 controls the operating state of the clutch 26 between the completely engaged state and the released state by controlling the TCM 12. In the completely engaged state, the clutch 26 transmits power between the engine 2 and the transmission 3. In the released state, the clutch 26 does not transmit power between the engine 2 and the transmission 3. Between the completely engaged state and the disengaged state, the clutch 26 is in an operating state (a so-called half-clutch state) in which a part of power is transmitted between the engine 2 and the transmission 3.

  The shift actuator 52 moves a shift sleeve (not shown) of the speed change mechanism 25 under the control of the TCM 12 to switch the shift speed. Hereinafter, switching the shift stage with the clutch 26 in the disengaged state is also simply referred to as shifting.

  As described above, the transmission 3 is configured as an automatic transmission called AMT (Automated Manual Transmission), which is capable of automatically shifting under the control of the TCM 12. It should be noted that in the transmission 3, switching the shift speed to a shift speed higher than the current shift speed (for example, 3rd speed→4th speed) is called upshift, and the shift speed is switched to a shift speed lower than the current shift speed. That (for example, 4th gear→3rd gear) is called downshift. The differential mechanism 27 is adapted to transmit the power output by the speed change mechanism 25 to the drive shaft 23.

  In the present embodiment, when the clutch 26 is in the completely engaged state or the operating state, the transmission 3 is said to be in the transmission state, and when the clutch 26 is in the released state, the transmission 3 is in the non-engagement state. It is said to be in the state of transmission.

  The ECM 11 and the TCM 12 each include a CPU (Central Processing Unit), a RAM (Random Access Memory), a ROM (Read Only Memory), a flash memory for storing backup data and the like, an input port, and an output port. It is composed of a computer unit provided.

  ROMs of these computer units store various constants, various maps, and programs for causing the computer units to function as the ECM 11 and the TCM 12, respectively.

  That is, when the CPU executes the program stored in the ROM using the RAM as a work area, these computer units respectively function as the ECM 11 and the TCM 12 in this embodiment.

  In the present embodiment, the ECM 11 is connected to an accelerator opening sensor 19 that detects the operation amount of the accelerator pedal 20 (hereinafter, also simply referred to as “accelerator opening”). The ECM 11 controls the operation amount of the throttle valve 14 and the like according to the accelerator opening detected by the accelerator opening sensor 19 and the operating state of the engine 2.

  The vehicle 1 is provided with a CAN communication line for forming an in-vehicle LAN (Local Area Network) conforming to a standard such as CAN (Controller Area Network). The ECM 11 and the TCM 12 are connected by a CAN communication line, and mutually transmit and receive signals such as control signals via the CAN communication line.

  On the CAN communication line, the difference between the detection value of the supercharging pressure sensor 13 and the detection value of the atmospheric pressure sensor 80 is used as the supercharging pressure sensor value, and the supercharging pressure for display is displayed based on the supercharging pressure sensor value. The meter 10 is connected. In this embodiment, the meter 10 constitutes a display device, and the ECM 11 and the meter 10 constitute a supercharging pressure display device 4.

  Further, in the present embodiment, the ECM 11 functions as a control unit and performs a smoothing process for suppressing fluctuation of the sensor value of the supercharging pressure and calculates a supercharging pressure for display to be displayed on the meter 10. .. The smoothing process is performed based on the following equation, for example. The annealing treatment may be performed using a method other than the following formula.

  Supercharging pressure for display = sensor value of supercharging pressure × smoothing coefficient + previous supercharging pressure for display × (1-smoothing coefficient)

  The smoothing coefficient is defined by the ECM 11 in the range of 0 to 1. When the averaging coefficient becomes smaller, the anneal degree becomes higher, the fluctuation of the display supercharging pressure is suppressed, and the followability of the actual supercharging pressure to the sensor value becomes lower. When the smoothing coefficient becomes large, the smoothing degree becomes low, the fluctuation of the display supercharging pressure is not suppressed, and the followability of the actual supercharging pressure to the sensor value becomes high.

  In addition, the smoothing process is not limited to the previous display supercharging pressure, and the present display supercharging pressure may be calculated using the display supercharging pressure up to a predetermined number of times. The smoothing process is synonymous with the smoothing process, and for example, the current supercharging pressure for display may be calculated using a weighted moving average.

  The ECM 11 sets the moderating coefficient according to the detection value of the accelerator opening sensor 19 and the state of the transmission 3 obtained from the TCM 12. For example, the ECM 11 reduces the smoothing coefficient during the shift of the transmission 3 as compared to before the shift is started. As a result, the ECM 11 suppresses the driver's excessive operation of the accelerator by suppressing the decrease in the display supercharging pressure during the gear shift, and suppresses the deterioration of fuel efficiency.

  Specifically, when the ECM 11 performs an upshift in a driving force request state in which a driving force is required (for example, the accelerator opening detected by the accelerator opening sensor 19 is a predetermined value or more). Reduces the smoothing coefficient smaller than that in the normal state when the operating state of the clutch 26 is controlled from the completely engaged state to the operating state.

  The ECM 11 returns the smoothing coefficient to the normal value (hereinafter, referred to as “normal value”) after a predetermined time has elapsed from the completion of the shift when the operating state of the clutch 26 is in the completely engaged state. Here, the predetermined time is the time required for the supercharging pressure reduced by the gear shift to return, and is experimentally obtained in advance. The predetermined time may be a fixed time or a time depending on the engine speed of the engine 2.

  It should be noted that after the shift is completed, after the difference between the detection value of the supercharging pressure sensor 13 and the detection value of the atmospheric pressure sensor 80, that is, the sensor value of the supercharging pressure becomes equal to or more than a predetermined value, the ECM 11 sets the smoothing coefficient. You may make it return to a normal value. The ECM 11 may return the smoothing coefficient to the normal value after the detection value of the supercharging pressure sensor 13 becomes equal to or higher than a predetermined value after the completion of the shift.

  When a downshift is performed in the driving force request state, the ECM 11 increases the smoothing coefficient from the normal state when the operating state of the clutch 26 is controlled from the completely engaged state to the operating state, When the operating state of 26 is controlled from the operating state to the released state, the smoothing coefficient is made smaller than in the normal state. After the shift is completed, the ECM 11 sets the smoothing coefficient as in the upshift.

  The supercharging pressure display operation of the ECM 11 configured as above will be described with reference to FIG. The supercharging pressure display operation described below is repeatedly executed while the ECM 11 is operating.

  First, in step S1, the ECM 11 inputs the detection value of the supercharging pressure sensor 13. After executing the process of step S1, the ECM 11 executes the process of step S2. In step S2, the ECM 11 inputs the detection value of the atmospheric pressure sensor 80. After executing the process of step S2, the ECM 11 executes the process of step S3.

  In step S3, the ECM 11 receives the automatic shift information indicating the state of the transmission 3 from the TCM 12. The automatic shift information includes information such as whether the transmission 3 is undergoing an automatic shift or the automatic shift is completed. After executing the process of step S3, the ECM 11 executes the process of step S4.

  In step S4, the ECM 11 determines whether or not the driving force is in a required state and the automatic gear shifting is being performed, or whether a predetermined time has elapsed after completion of the automatic gear shifting. When it is determined in step S4 that the driving force is not requested, that the automatic gear shifting is not being performed, or that the predetermined time has not passed after the completion of the automatic gear shifting, the ECM 11 executes the processing of step S5.

  When it is determined in step S4 that the driving force is in a required state and the automatic gear shifting is being performed, or that the predetermined time has not passed after the completion of the automatic gear shifting, the ECM 11 executes the process of step S8.

  In step S5, the ECM 11 sets the smoothing coefficient to the normal value C. The normal value C is a fitting value that is experimentally obtained in advance. After executing the process of step S5, the ECM 11 executes the process of step S6.

  In step S6, the ECM 11 calculates the display supercharging pressure by the smoothing process. After executing the process of step S6, the ECM 11 executes the process of step S7. In step S7, the ECM 11 causes the meter 10 to display the supercharging pressure for display. After executing the processing of step S7, the ECM 11 ends the supercharging pressure display operation.

  In step S8, the ECM 11 determines whether the gear shift in step S4 is an upshift. When it is determined in step S8 that the shift is an upshift, the ECM 11 executes the process of step S9. If it is determined in step S8 that the shift is not an upshift, that is, if the shift is a downshift, the ECM 11 executes the process of step S10.

  In step S9, the ECM 11 sets the smoothing coefficient to a low specified value L smaller than the normal value C. The low specified value L is a fitting value that is experimentally obtained in advance. After executing the process of step S9, the ECM 11 executes the process of step S6.

  In step S10, the ECM 11 determines whether the clutch 26 has not been released, that is, whether the operating state of the clutch 26 is the operating state or the completely engaged state. When it is determined that the clutch 26 has not been released, the ECM 11 executes the process of step S11. When it is determined that the clutch 26 is not released yet, that is, the operating state of the clutch 26 is in the released state, the ECM 11 executes the process of step S12.

  In step S11, the ECM 11 sets the smoothing coefficient to a high specified value H that is larger than the normal value C. The high specified value H is a fitting value that is experimentally obtained in advance. After executing the process of step S11, the ECM 11 executes the process of step S6. In step S12, the ECM 11 sets the smoothing coefficient to the low specified value L. After executing the processing of step S12, the ECM 11 executes the processing of step S6.

  The operation of the supercharging pressure display device 4 described above will be described with reference to FIGS. 3 and 4. FIG. 3 shows the operation of the supercharging pressure display device 4 during the upshift, and FIG. 4 shows the operation of the supercharging pressure display device 4 during the downshift.

  3 and 4, the horizontal axis represents time, and the vertical axis represents, from the top, the engine speed of the engine 2 (engine speed), a shift flag indicating whether gear shifting is in progress, and the operating state of the clutch 26. , The smoothing coefficient, the supercharging pressure for display, and the accelerator opening.

  In addition, in the engine speeds shown in FIGS. 3 and 4, the “3rd speed synchronous speed” represents the engine speed that is calculated backward from the vehicle speed assuming that the gear stage of the transmission 3 is the 3rd speed. , “4th speed synchronous speed” represents the engine speed that is calculated back from the vehicle speed assuming that the gear stage of the transmission 3 is the 4th speed.

  Further, in the supercharging pressure for display shown in FIGS. 3 and 4, the solid line represents the supercharging pressure for display in the supercharging pressure display device 4 of the present embodiment, and the broken line represents the smoothing coefficient to the normal value C. The supercharging pressure for display when fixed is shown as a comparative example, and the alternate long and short dash line shows the sensor value of the supercharging pressure.

  In addition, in the accelerator opening degree shown in FIGS. 3 and 4, the solid line represents the expected value of the accelerator opening degree in the supercharging pressure display device 4 of the present embodiment, and the broken line fixes the smoothing coefficient to the normal value C. The assumed value of the accelerator opening in the case of doing is shown as a comparative example.

(During upshift)
In FIG. 3, when the upshift of the transmission 3 is started at time t1, the operating state of the clutch 26 changes from the completely engaged state to the operating state. Further, when the upshift of the transmission 3 is started, the moderating coefficient is set to the low specified value L (see step S9 in FIG. 2).

  At time t2, when the operating state of the clutch 26 changes from the operating state to the released state, the torque for driving the vehicle 1 is not transmitted from the engine 2 to the transmission 3. Therefore, the engine speed starts to decrease due to the engine torque limitation.

  At time t3, when the shift speed formed by the speed change mechanism 25 is changed from the third speed to the fourth speed, the operating state of the clutch 26 changes from the released state to the operating state. As a result, the engine speed rapidly decreases to the synchronous speed of the fourth speed. Therefore, the supercharging pressure sensor value sharply decreases.

  From time t2 to time t3, the driving force of the vehicle 1 transmitted from the engine 2 disappears, and from time t3 to time t4, the operating state of the clutch 26 becomes the operating state, and the drive transmitted from the engine 2 The force is insufficient for the driving force of the vehicle 1 required by the driver.

  In addition, in the comparative example, the supercharging pressure for display sharply decreases from the time t2 to the time t4 as shown by the broken line. Therefore, in the comparative example, the driver erroneously recognizes that the driving force of the vehicle 1 is insufficient because the boost pressure is reduced, and the driver excessively tries to recover the driving force of the vehicle 1. Depress the accelerator to (see the broken line of the accelerator opening).

  On the other hand, in the supercharging pressure display device 4 of the present embodiment, by reducing the averaging coefficient during upshifting, the degree of grading is increased to moderate the decrease in the supercharging pressure for display, and the driver is excessive It prevents you from stepping on the accelerator.

  At time t4, when the operating state of the clutch 26 is completely engaged, the upshift of the transmission 3 is completed. However, the boost pressure has not been completely recovered. For this reason, the supercharging pressure display device 4 maintains the smoothing coefficient at a small value until a predetermined time elapses from the completion of the upshift to the recovery of the decrease in the supercharging pressure, and thus the excessive acceleration is prevented. Prevents stepping.

  At time t5, when a predetermined time has elapsed from time t4, the smoothing coefficient is set to the normal value C (see step S5 in FIG. 2). As described above, the supercharging pressure display device 4 enhances the followability of the supercharging pressure for display with respect to the sensor value by increasing the moderating coefficient in the normal state as compared with that during the upshift, and displays the supercharging pressure for display with respect to the driving operation of the driver. Improves boost pressure response and fuel efficiency.

(During downshift)
In FIG. 4, at time t0, the driver has an intention to accelerate and the accelerator pedal 20 is depressed, so that the accelerator opening degree increases. As a result, the output torque of the engine 2 increases and the boost pressure starts to increase.

  At time t1, the downshift of the transmission 3 is started, and the operating state of the clutch 26 changes from the completely engaged state to the operating state. In the case of downshift, the engine torque limit is not entered, so the boost pressure continues to rise.

  At time t2, when the operating state of the clutch 26 changes from the operating state to the released state, the engine 2 is disconnected from the drive wheels 5, and the engine speed suddenly starts to increase. Due to the rapid increase in the engine speed, the intake amount of air introduced into the combustion chamber of the engine 2 increases, and the supercharging pressure temporarily decreases.

  At time t3, the engine speed exceeds the synchronous speed of the third speed, which is the target shift speed, and the operating state of the clutch 26 changes from the released state to the operating state. Since the increase of the engine speed has stopped, the intake amount of the air introduced into the combustion chamber of the engine 2 becomes stable, and the supercharging pressure starts to increase again.

  From time t1 to time t4, the operating state of the clutch 26 is in the operating state or the released state, and the driving force of the vehicle 1 transmitted from the engine 2 is insufficient with respect to the driving force required by the driver.

  Further, the comparative example of the supercharging pressure for display sharply decreases from the time t2 to the time t3. Therefore, the driver erroneously recognizes that the driving force of the vehicle 1 is insufficient because the boost pressure is lowered, and the driver excessively depresses the accelerator to increase the driving force of the vehicle 1. (Refer to the broken line of the accelerator opening).

  Therefore, the supercharging pressure display device 4 sets the smoothing coefficient to the low specified value L from the time t2 to the time t5 (see step S12 in FIG. 2). In this way, the supercharging pressure display device 4 moderates the decrease in the supercharging pressure for display to prevent the driver from excessively depressing the accelerator.

  The supercharging pressure display device 4 sets the smoothing coefficient to the high specified value H from the time t1 to the time t2 to increase the followability of the supercharging pressure for display to the sensor value of the supercharging pressure (Fig. 2 of step S11). As a result, the supercharging pressure display device 4 informs the driver that the supercharging pressure is increasing and prevents the accelerator from being excessively depressed.

  Further, the supercharging pressure display device 4 sets the smoothing coefficient to the high specified value H from the time t1 to the time t2, and sets the smoothing coefficient to the low specified value L from the time t2 to the time t5. As a result, when the supercharging pressure rises, the display supercharging pressure also rises, and when the supercharging pressure falls, the display supercharging pressure is gradually reduced, so that the The supercharging pressure for display is kept higher for a predetermined time to prevent the driver from excessively depressing the accelerator.

  At time t4, when the operating state of the clutch 26 becomes the complete engagement state, the shift of the transmission 3 is completed. At time t5, when a predetermined time has elapsed from time t4, the smoothing coefficient is set to the normal value C (see step S5 in FIG. 2).

  As described above, during the shift of the transmission 3, the boost pressure display device according to the present embodiment increases the smoothing degree of the smoothing process as compared with before the shift is started, thereby It is possible to suppress a decrease in the supercharging pressure for display. For this reason, in the supercharging pressure display device according to the present embodiment, the driver may erroneously recognize that the driving force of the vehicle 1 is insufficient because the supercharging pressure is reduced and depress the accelerator excessively. Can be suppressed. As a result, it is possible to prevent deterioration of fuel efficiency.

  Further, during upshifting in a state where the driving force is required, the driving force of the vehicle 1 is insufficient to meet the driver's request because the power from the engine 2 to the driving wheels 5 is temporarily set to the non-transmission state. Further, when it is displayed that the supercharging pressure has decreased with the decrease of the engine speed, the driver erroneously recognizes that the driving force of the vehicle 1 is insufficient because of the decrease of the supercharging pressure, To depress the accelerator excessively to increase the boost pressure.

  On the other hand, in the supercharging pressure display device according to the present embodiment, in the state where the driving force is required, the moderation degree of the smoothing process executed during the upshift is compared with that before the start of the upshift. By increasing the temperature, the display pressurization pressure is gradually decreased, so that it is possible to prevent the driver from excessively depressing the accelerator and prevent the fuel consumption from being deteriorated.

  Further, during a downshift in which a driving force is required, the engine speed rapidly increases after the power from the engine 2 to the driving wheels 5 is not transmitted. Due to the rapid increase in the engine rotation, the intake amount of the air introduced into the combustion chamber of the engine 2 increases and the boost pressure decreases.

  Therefore, at the time of downshifting in a state where the driving force is required, when it is displayed that the supercharging pressure is significantly reduced after the power is not transmitted, the driving force of the vehicle 1 is insufficient. The driver mistakenly recognizes that this is due to the decrease in the supercharging pressure, and the driver excessively depresses the accelerator to increase the supercharging pressure.

  On the other hand, in the supercharging pressure display device according to the present embodiment, in the state where the driving force is required, the transmission 3 during the downshift is less than that before the transmission 3 is in the non-transmission state. By increasing the degree of smoothing of the smoothing process after becoming a non-transmission state, the decrease of the supercharging pressure for display is moderated, so that the driver's excessive depression of the accelerator is suppressed and the fuel consumption deteriorates. Can be suppressed.

  Further, before the power is not transmitted during the downshift, the boost pressure increases according to the accelerator opening. On the other hand, in the supercharging pressure display device according to the present embodiment, when the driving force is required, the transmission 3 is in the non-transmission state during the downshift as compared to before the downshift is started. By lowering the degree of smoothing of the smoothing process before it occurs, the response of the supercharging pressure for display is improved and the driver excessively depresses the accelerator in order to inform the driver of the rise of the supercharging pressure. It is possible to suppress the deterioration of fuel efficiency.

  Moreover, the reduced boost pressure has not recovered within a certain period of time after the completion of the shift. On the other hand, the supercharging pressure display device according to the present embodiment keeps the smoothing degree of the smoothing process high until a predetermined time elapses after the gear shift of the transmission 3 is completed, so that the operation after the gear shift is completed. It is possible to prevent a person from excessively depressing the accelerator and to prevent deterioration of fuel efficiency.

1 vehicle 2 engine 3 transmission (automatic transmission)
4 Supercharging pressure display device 5 Drive wheel 10 meters (display device)
11 ECM (control unit)
13 Supercharging pressure sensor (supercharging pressure detector)
17 Supercharger 20 Accelerator pedal 80 Atmospheric pressure sensor (supercharging pressure detector)

Claims (5)

An engine with a supercharger,
The rotation output from the engine is transmitted to the drive wheels after being shifted at a predetermined gear, and the rotation output from the engine is not temporarily transmitted to the drive wheels during the gear shift to switch the gear. An automatic transmission that is in transmission,
A supercharging pressure detection unit for detecting supercharging pressure of the engine by the supercharger,
A supercharging pressure display device for a vehicle, comprising:
A control unit for calculating a display supercharging pressure to be displayed on the display device by performing a smoothing process for suppressing a variation in the detection value of the supercharging pressure detection unit,
The supercharging pressure display device according to claim 1, wherein the control unit increases the smoothing degree of the smoothing process during a shift of the automatic transmission as compared with before the shift is started. The vehicle further includes an accelerator pedal that requires a driving force,
In the state where the driving force is requested by the accelerator pedal, the control unit executes during the upshift as compared with before the start of the upshift that switches the shift speed to a higher shift speed than the current shift speed. The supercharging pressure display device according to claim 1, wherein the moderation degree of the moderating process is increased.   In a state where a driving force is required by the accelerator pedal, the control unit is configured to control the automatic transmission before the non-transmission state during the downshift for switching the shift stage to a shift stage lower than the current shift stage. The supercharging pressure display device according to claim 2, wherein a degree of smoothing of the smoothing process after the automatic transmission is in the non-transmission state is increased as compared with the above.   In the state where the driving force is requested by the accelerator pedal, the control unit compares the state before the downshift is started with the state before the automatic transmission is in the non-transmission state during the downshift. The supercharging pressure display device according to claim 3, wherein the moderation degree of the moderating process is lowered.   The control unit maintains a high degree of smoothing of the smoothing process until a predetermined time elapses after shifting of the automatic transmission is completed. Supercharging pressure display device according to paragraph.

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