JP2017207122A - Shift instructing device of vehicle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a shift instructing device of a vehicle capable of suppressing a display of unnecessary shift instruction during an operation of cruise control.SOLUTION: A shift instructing device of a vehicle 1 provided with an automatic transmission 3 capable of manually changing a shift stage, and including a constant speed travel control portion 41 for keeping a vehicle speed set by a driver and controlling cruise control, further includes a notification device 20 for notifying a shift stage changing timing formed in the automatic transmission 3, and a shift instructing portion 40 for notifying the notification device 20 of a shift timing when predetermined conditions are established. The shift instructing portion 40 does not display an up-shift instruction only for a prescribed time when a shift-down operation is performed under a condition that the constant speed travel control portion 41 performs the control of cruise control.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a shift instruction device for a vehicle.

  2. Description of the Related Art Conventionally, there is a shift instruction device that instructs a driver to shift to an optimum gear according to the accelerator opening and the vehicle speed.

  The gear shift instruction device instructs the driver to shift using a shift diagram in which the optimum gear stage is set based on the accelerator opening and the vehicle speed, etc., and does not display the gear shift command according to the driver's gear shift intention There is.

  In Patent Document 1, in a vehicle equipped with a manual transmission, since the accelerator opening is in a fully closed state immediately after completion of shifting to the deceleration side, an instruction for shifting operation to the increasing speed side is given, and the driver In order to prevent the gear shifting operation to the speed increasing side from being instructed in spite of intentionally shifting the gear to the deceleration side in order to accelerate the vehicle, the gear shifting operation to the deceleration side is performed. A shift instruction device is disclosed that prohibits an instruction for a shift operation to the speed increasing side until a predetermined time elapses from the timing at which the shift to the deceleration side is detected.

JP 2007-225096 A

  In recent years, there is a vehicle equipped with a cruise control system that travels at a constant speed at a vehicle speed set by a driver.

  In the manual mode of a vehicle equipped with an automatic transmission equipped with a cruise control system, for example, when the cruise control is activated and the driver sets a high vehicle speed, the vehicle speed is set from a vehicle speed of about 60 km / h. To accelerate.

  At that time, the cruise control system sets the accelerator opening to a large value, for example, 100% by accelerating to the set vehicle speed, so that the shift is forced to the low speed side even in the manual mode. A kickdown is performed.

  At this time, the accelerator opening is set to a small value, for example, 40% so that the vehicle speed is not excessively accelerated by the occurrence of kickdown. Then, the shift instruction device issues an upshift instruction using a shift diagram in which an optimum gear stage is set based on the vehicle speed and the accelerator opening.

  Further, when the driver performs a shift up operation in accordance with the upshift instruction, the accelerator opening is increased by the amount corresponding to the increase of the gear stage, kickdown occurs again, and this is repeated.

  By operating the cruise control system, this phenomenon is repeated until the set vehicle speed is reached, the upshift instruction is repeatedly performed, and the upshift instruction unnecessary for the driver is performed.

  SUMMARY OF THE INVENTION An object of the present invention is to provide a shift instruction device for a vehicle that can suppress display of an unnecessary shift instruction during cruise control operation.

  In order to solve the above-described problems, the present invention is equipped with a transmission that shifts the power output from the internal combustion engine to a speed corresponding to a plurality of shift speeds, and can optionally select the shift speed, and is set by the driver. A shift instruction device for a vehicle including a constant speed travel control unit for maintaining the vehicle speed and controlling constant speed travel, a notification device for notifying a change timing of a shift stage formed in the transmission, and a preset condition A shift instructing unit that informs the notification device of the change timing when the condition is established, and the shift instructing unit is configured so that when the constant speed traveling control unit controls the constant speed traveling, When the gear is downshifted, the notification of the change timing of the shift stage of the upshift is prohibited for a predetermined time from the downshift.

  Thus, according to the present invention, it is possible to provide a shift instruction device for a vehicle that can suppress display of an unnecessary shift instruction during the operation of cruise control.

FIG. 1 is a schematic configuration diagram of a vehicle shift instruction apparatus according to an embodiment of the present invention. FIG. 2 is a diagram showing a shift map of the shift instruction device for a vehicle according to one embodiment of the present invention. FIG. 3 is a flowchart showing a procedure of a shift instruction process of the shift instruction device for a vehicle according to the embodiment of the present invention. FIG. 4 is a flowchart showing a procedure of upshift instruction permission determination of the vehicle shift instruction apparatus according to the embodiment of the present invention. FIG. 5 is a time chart showing a change in upshift instruction display by a shift instruction process of a conventional vehicle shift instruction apparatus. FIG. 6 is a time chart showing changes in the upshift instruction display by the shift instruction process and the upshift instruction permission determination process of the vehicle shift instruction apparatus according to the embodiment of the present invention.

  DESCRIPTION OF EMBODIMENTS Hereinafter, a vehicle shift instruction device according to an embodiment of the present invention will be described in detail with reference to the drawings.

  In FIG. 1, a vehicle 1 equipped with a vehicle shift instruction device according to an embodiment of the present invention includes an internal combustion engine 2, an automatic transmission 3, a gear mechanism 4, drive wheels 5, an ECU ( Electronic Control Unit) 6.

  The engine 2 is constituted by a four-cycle engine that performs a series of four strokes including an intake stroke, a compression stroke, an expansion stroke, and an exhaust stroke.

  The automatic transmission 3 is provided in a power transmission path from the engine 2 to the drive wheels 5. The automatic transmission 3 can form any one shift stage among a plurality of shift stages. Specifically, in the automatic transmission 3, the gear position is changed by a hydraulic circuit (not shown) controlled by the ECU 6.

The gear mechanism 4 includes a differential gear and a drive shaft (not shown), and transmits power to the drive wheels 5.

  The ECU 6 includes a computer unit that includes a central processing unit (CPU), a random access memory (RAM), a read only memory (ROM), a flash memory, an input port, and an output port.

  A program for causing the computer unit to function as the ECU 6 is stored in the ROM of the ECU 6 together with various constants, various maps, and the like. That is, when the CPU executes a program stored in the ROM, the computer unit functions as the ECU 6 in the present embodiment.

  The input port of the ECU 6 includes an engine speed sensor 10 that detects an engine speed of the engine 2 (hereinafter also referred to as “engine speed”), a vehicle speed sensor 11 that detects a vehicle speed, and an operation amount of an accelerator pedal 14 ( Hereinafter, the accelerator position sensor 15 for detecting the accelerator position) and the shift position of the shift lever 16 are in the P (parking) range, R (reverse) range, D (drive) range, or M (manual). Various sensors including a shift position sensor 17 for detecting in which of the ranges or the like are connected are connected.

  In addition to the hydraulic circuit for controlling the automatic transmission 3, the output port of the ECU 6 includes a notifying device 20 provided on an instrument panel and the like, and a throttle valve 30 for adjusting the intake air amount of the engine 2. Various control objects including an injector 31 for injecting fuel into the combustion chamber of the engine 2 are connected.

  The ECU 6 controls various control objects based on information obtained from various sensors. For example, the ECU 6 controls the hydraulic circuit so as to change the shift speed formed in the automatic transmission 3 in accordance with the position of the shift lever 16 detected by the shift position sensor 17.

  When the shift position of the shift lever 16 is in the D range, the ECU 6 determines the gear position based on the vehicle speed, the accelerator opening, and the like, and controls the hydraulic circuit to change to the gear position.

  Further, when the shift position of the shift lever 16 is in the M range, the ECU 6 receives the manual upshift command and the manual downshift command from the shift position sensor 17 and, when receiving the manual upshift command from the current gear position, The hydraulic circuit is controlled to change the gear position to the side.

  Further, for example, when the ECU 6 detects that the accelerator pedal 14 is largely or suddenly depressed and the accelerator opening is increased, the ECU 6 changes the gear position of the automatic transmission 3 to a gear position lower than the current gear position. It is supposed to go down.

  Further, the ECU 6 obtains a required torque that is an output torque required for the engine 2 based on the accelerator opening detected by the accelerator opening sensor 15, and opens the throttle valve 30 so that the engine 2 outputs the required torque. (Hereinafter, also referred to as “throttle opening”) and the fuel injection amount by the injector 31 are controlled.

  For example, when the cruise control switch provided on the steering wheel is turned on, the ECU 6 causes the engine 2 to cause the vehicle 1 to perform a constant speed traveling while maintaining a predetermined vehicle speed set in advance. A constant speed traveling control unit 41 to be controlled is configured. The constant speed traveling control unit 41 obtains a required accelerator opening that is an accelerator opening required to make the vehicle speed of the vehicle 1 a predetermined vehicle speed, for example, from the difference between the predetermined vehicle speed and the current vehicle speed of the vehicle 1, The requested accelerator opening is set as an accelerator opening request and transmitted to the ECU 6 to control cruise control for causing the vehicle 1 to travel at a constant speed at a predetermined vehicle speed.

  Upon receiving the accelerator opening request, the ECU 6 compares the accelerator opening detected by the accelerator opening sensor 15 with the requested accelerator opening set in the accelerator opening request, and calculates the required torque based on the larger accelerator opening. The throttle valve 30 and the injector 31 are controlled by obtaining the throttle opening and the fuel injection amount from the required torque.

  In addition, when the shift position of the shift lever 16 is in the M range, the ECU 6 includes a shift instruction unit 40 that notifies the notification device 20 of the shift timing of the automatic transmission 3 as a shift instruction based on the vehicle speed and the load of the engine 2. Configure. The notification device 20 includes, for example, an LED (Light Emitting Diode) provided on an instrument panel and an LED drive circuit. The gear change instruction unit 40 instructs the notification device 20 to, for example, “upshift instruction display” for instructing the driver to upshift, “stay instruction display” for instructing the driver to maintain the gear position, and downshifting to the driver. A “downshift instruction display” for instructing, a “gear position display” for notifying the driver of the current gear position, and the like are displayed.

  A shift map as shown in FIG. 2 is stored in the ROM of the ECU 6. The shift map represents a shift stage corresponding to the vehicle speed and the accelerator opening representing the load of the engine 2. In FIG. 2, the solid line indicated by “1⇒2” is from the first speed to the second speed, the solid line indicated by “2 → 3” is from the second speed to the third speed, and the solid line indicated by “3 → 4” is from the third speed. In 4th speed, the solid line shown as “4⇒5” is the 4th to 5th speed line, and the solid line shown as “5⇒6” is the instruction line indicating the timing to shift up from the 5th speed to 6th speed Also called a "line").

  In FIG. 2, the upshift instruction line is shown. However, a downshift instruction line indicating the timing of downshifting to shift from one gear stage to the next gear stage is also set for each gear stage.

  When the constant speed traveling control unit 41 is performing the constant speed traveling control, the shift instruction unit 40 is requested by the constant speed traveling control unit 41 and the accelerator opening detected by the accelerator opening sensor 15. Are compared, and a shift instruction is issued by referring to the shift map according to the larger accelerator opening and vehicle speed.

  When the shift position of the shift lever 16 is in the M range, the shift instruction unit 40 refers to the shift map shown in FIG. 2 and informs the notification device 20 of the shift timing of the shift stage formed in the automatic transmission 3 as a shift instruction. Let me know.

  The shift instruction unit 40 is configured to change the shift stage when the intersection corresponding to the vehicle speed and the accelerator opening crosses the instruction line from the intersection at the previous reference while the shift stage of the automatic transmission 3 is maintained. Is notified to the notification device 20 as a shift instruction.

  The shift instruction unit 40 shifts the shift stage of the automatic transmission 3 when the intersection corresponding to the vehicle speed and the accelerator opening amount extends from the left area of the shift up instruction line to the right area with the shift up instruction line as a boundary. When the shift stage is lower than the shift stage to which the up instruction line is shifted up, the notification apparatus 20 displays an upshift instruction display. Further, after the upshift instruction display is performed, the shift instruction unit 40 hides the upshift instruction display displayed on the notification device 20 when a shift up operation is performed by the driver.

  When the shift position of the shift lever 16 is in the M range and the constant speed traveling control unit 41 is performing the constant speed traveling control, the shift instruction unit 40 displays an upshift instruction display for a predetermined time when the downshift is performed. Do not display.

  The shift instruction unit 40 detects that a downshift has been performed under the control of the ECU 6, and stores the detected time.

  The predetermined time is obtained in advance by experiments or the like and stored in the ROM of the ECU 6. The predetermined time may be switched depending on the engine speed because there is a possibility of overrev when the engine speed is in a high speed region. Alternatively, an upshift instruction display may be displayed when the engine speed becomes high.

  That is, the shift instruction unit 40 may prohibit the upshift instruction display only when the engine speed is equal to or lower than a preset predetermined engine speed. The predetermined number of revolutions is obtained in advance by experiments or the like and stored in the ROM of the ECU 6.

  Further, the predetermined time may be switched not by the engine speed but by the vehicle speed.

  The shift instruction process by the vehicle shift instruction apparatus according to the present embodiment configured as described above will be described with reference to FIG. Note that the shift instruction process described below is started when the ECU 6 starts to operate, and is executed at a preset time interval.

  In step S <b> 1, the shift instruction unit 40 reads the current shift stage controlled by the ECU 6.

  In step S2, the shift instruction unit 40 calculates a target shift stage from the accelerator opening and the vehicle speed using a shift map.

  In step S3, the shift instruction unit 40 determines whether or not the upshift instruction display is in a state of being performed based on the current shift stage and the target shift stage. If it is determined that the upshift instruction display is not being performed, the shift instruction unit 40 performs a necessary shift instruction process in step S4 and ends the process.

  When it is determined that the upshift instruction display is being performed, in step S5, the shift instruction unit 40 determines whether or not an upshift instruction permission flag by an upshift instruction permission determination process described later is permitted. When it is determined that the upshift instruction permission flag is not permitted, the shift instruction unit 40 ends the process without performing the shift instruction process.

  If it is determined that the upshift instruction permission flag is permitted, a necessary shift instruction process is performed in step S4, and the process ends.

  Next, the upshift instruction permission determination process will be described with reference to FIG. Note that the upshift instruction permission determination process described below is started when the ECU 6 starts operation, and is executed at a preset time interval.

  In step S11, the shift instruction unit 40 determines whether or not the engine speed is equal to or less than a predetermined speed set in advance. If it is determined that the engine speed is not equal to or lower than the predetermined speed, the shift instruction unit 40 sets permission for the upshift instruction permission flag in step S16 and ends the process.

  When it is determined that the engine speed is equal to or lower than the predetermined speed, the shift instruction unit 40 determines whether or not the constant speed traveling control is being operated by the constant speed traveling control unit 41 in step S12. If it is determined that the constant speed traveling control is not in operation, in step S16, the shift instruction unit 40 sets permission for the upshift instruction permission flag and ends the process.

  If it is determined that the constant speed traveling control is in operation, in step S13, the shift instruction unit 40 determines whether or not a downshift has been performed. If it is determined that no downshift has been performed, in step S16, the shift instruction unit 40 sets permission for the upshift instruction permission flag and ends the process.

  If it is determined that a downshift has been performed, in step S14, the shift instruction unit 40 sets a prohibition in the upshift instruction permission flag.

  In step S15, the shift instruction unit 40 determines whether or not a predetermined time has elapsed since the downshift was performed. If it is determined that the predetermined time has not elapsed since the downshift was performed, the shift instruction unit 40 ends the process.

  If it is determined that a predetermined time has elapsed since the downshift was performed, in step S16, the shift instruction unit 40 sets permission for the upshift instruction permission flag and ends the process.

  Operations by such shift instruction processing and upshift instruction permission determination processing will be described with reference to FIGS. FIG. 5 shows a change in the upshift instruction display by the conventional process, and FIG. 6 shows a change in the upshift instruction display by the process of the present embodiment.

  As shown in FIG. 5, in the conventional process, when a high vehicle speed is set as the set vehicle speed, the required accelerator opening degree from the constant speed traveling control unit 41 is increased, and kickdown occurs. When the kick-down occurs, the accelerator opening is lowered, and an upshift instruction is displayed based on the target shift speed obtained from the accelerator opening and the vehicle speed and the current shift speed. Here, when the driver performs a shift-up operation, the accelerator opening increases by the amount of the shift-up, and the vehicle speed does not readily increase because of the shift-up, and kick-down occurs again. When the kick-down occurs, the accelerator opening is lowered, an upshift instruction is displayed from the accelerator opening and the vehicle speed, and when the driver performs the upshift operation again, this is repeated until the vehicle speed reaches the set vehicle speed.

  In the present embodiment, as shown in FIG. 6, when a high vehicle speed is set as the set vehicle speed, the required accelerator opening degree from the constant speed traveling control unit 41 is increased, and kickdown occurs. When the kickdown occurs, the accelerator opening is lowered, and the upshift instruction is displayed depending on the target shift speed obtained from the accelerator opening and the vehicle speed and the current shift speed. Upshift instruction display is not performed during the time. Since the upshift instruction display is not performed, the driver does not perform the upshift operation, and the accelerator opening increases and the vehicle speed also increases.

  If the upshift instruction display state is reached when the predetermined time has elapsed, the upshift instruction display is performed. Accordingly, even if the driver performs a shift-up operation, the vehicle speed is high, so that the kick-down does not occur and the set vehicle speed can be reached smoothly.

  Thus, in the above-described embodiment, when the cruise control is in operation and the shift position of the shift lever 16 is in the M range, the shift instruction unit 40 upshifts for a predetermined time when a downshift operation is performed. Does not display instructions.

  Thereby, when the constant speed traveling control unit 41 is performing the constant speed traveling control, when the downshifting operation is performed, the upshifting instruction is not given for a predetermined time from the downshifting operation. For this reason, it is possible to suppress display of an unnecessary shift instruction during cruise control operation.

  Further, the shift instruction unit 40 permits display of an upshift shift instruction when the engine speed is higher than a predetermined engine speed.

  Thus, when the engine speed is higher than the predetermined speed, an upshift instruction is displayed even if a downshift operation is performed. For this reason, it is possible to issue a gear shift instruction so that overrev does not occur in the engine 2.

  In this embodiment, the case of an automatic transmission is shown, but the present invention can be similarly applied to a vehicle equipped with a manual transmission.

  While embodiments of the invention have been disclosed, it will be apparent to those skilled in the art that changes may be made without departing from the scope of the invention. All such modifications and equivalents are intended to be included in the following claims.

1 vehicle 2 engine (internal combustion engine)
3 Automatic transmission (transmission)
6 ECU
DESCRIPTION OF SYMBOLS 11 Vehicle speed sensor 15 Accelerator opening sensor 17 Shift position sensor 20 Notification apparatus 40 Shift instruction | indication part 41 Constant speed driving | running control part

Claims (2)

The power output from the internal combustion engine is shifted to a speed corresponding to a plurality of shift speeds, and a transmission capable of arbitrarily selecting the shift speeds is installed, and the vehicle speed set by the driver is maintained and the constant speed driving is controlled. A shift instruction device for a vehicle including a constant speed traveling control unit,
An informing device for informing a change timing of a shift stage to be formed in the transmission;
A shift instruction unit that causes the notification device to notify the change timing when a preset condition is satisfied,
The shift instruction unit is configured to control the shift stage of the upshift for a predetermined time from the downshift when the shift stage is downshifted when the constant speed running control unit is controlling the constant speed running. A vehicle shift instruction device that prohibits notification of a change timing.   2. The vehicle shift instruction device according to claim 1, wherein when the engine speed of the internal combustion engine is higher than a predetermined rotation speed, the shift instruction unit permits notification of a change timing of the shift stage of the upshift. .

Images