JP2008049900A - Shift display device for automatic transmission - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a shift display device for an automatic transmission capable of notifying a driver of a present shift position even if a failure on a display unit occurs in a shift control system of a shift-by-wire method. <P>SOLUTION: A mechanical link mechanism comprises a disk 602 which is a power component of the link mechanism provided at a manual shaft 102 for moving a roller to a valley of at a requested shift position by turning a detent plate, a first movable pin 604 provided at the outer circumferential edge of the disk 602, a first rod 606 connected to the disk 602 by the first movable pin 604, and a second rod 612 connected to the first rod 606 by the second movable pin 608. The second rod 612 is turned around a fixed pin 610 according to the turn of the disk 602, and an arrow plate 502 at the tip of the second rod 612 points a plate at the present shift position. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a shift control system for an automatic transmission that switches the shift position (shift range) of an automatic transmission via an actuator such as a motor, and more particularly to determine the shift position based on the position of a shift lever as in the prior art. The present invention relates to a shift display device for an automatic transmission capable of notifying a driver of a shift position in a shift control system using an electrical signal.

  Some automatic transmissions mounted on vehicles include a stepped automatic transmission composed of a fluid coupling such as a torque converter and a gear-type transmission mechanism, two pulleys whose effective diameter is changed by hydraulic pressure, and those There is a continuously variable automatic transmission composed of a metal belt wound around a pulley.

  The stepped automatic transmission is connected to the engine via a fluid coupling such as a torque converter. A stepped automatic transmission is composed of a transmission mechanism (gear-type transmission mechanism) having a plurality of power transmission paths. For example, the power transmission path is automatically switched based on the accelerator opening and the vehicle speed. In other words, the transmission gear ratio (travel speed stage) is automatically switched. In a stepped automatic transmission, a gear stage is determined by engaging and releasing a clutch element, a brake element, and a one-way clutch element, which are friction elements, in a predetermined state.

  A continuously variable automatic transmission is also connected to the engine via a fluid coupling such as a torque converter. For example, a belt-type continuously variable transmission uses a metal belt and a pair of pulleys to change the effective diameter of the pulleys by hydraulic pressure, thereby realizing continuously variable transmission. Specifically, an endless metal belt is used by being wound around an input side pulley attached to an input shaft and an output side pulley attached to an output shaft. The input side pulley and the output side pulley are each provided with a pair of sheaves whose groove width can be changed steplessly. By changing the groove width, the winding radius of the endless metal belt with respect to the input side pulley and the output side pulley changes, Thereby, the rotation speed ratio between the input shaft and the output shaft, that is, the gear ratio can be continuously changed continuously.

  In any of these types of automatic transmissions, conventionally, a vehicle having an automatic transmission is generally operated by a driver (hereinafter, the driver may be described as a driver). A slide-type shift lever is provided, and a shift position (for example, parking position (P position) reverse drive position (R position), neutral position (N position), forward drive position (D position) based on the slide operation of the shift lever. ) Is set. Therefore, the driver can recognize the current shift position of the automatic transmission according to the position of the shift lever (by visually observing the position of the shift lever in the slide groove).

  The shift range refers to a range of transmission gear stages used during forward travel in an automatic transmission having a plurality of forward transmission gear stages (for example, 6th speed) (assuming that there is only one reverse transmission gear stage). Is. For example, if it is 1 range, only 1st speed is used, if it is 2 range, 1st speed and 2nd speed are used, if it is 3 range, 1st speed, 2nd speed and 3rd speed are used, and if it is D range 1st to 6th gear will be used.

  Recently, not only a shift operation device using such a slide-type shift lever but also a so-called shift-by-wire shift operation device is known. Such a shift operation device has a configuration in which a driver's shift operation is detected by a sensor or a switch (sensors), and one position among a plurality of positions is selected according to the detection signal. Further, in the case of such a shift-by-wire system, the shift lever is not limited to a slide type, and so-called joystick type operation buttons and push button type operation elements have been proposed. In this joystick type operation element, a driver performs a shift operation by tilting a lever forward, backward, left and right.

  Regarding the shift-by-wire type shift operation device, Japanese Patent Laid-Open No. 2002-2646844 (Patent Document 1) can avoid or reduce the driver's uncomfortable feeling caused by the adoption of the shift-by-wire type operation device. A vehicle shift operation device is disclosed. The shift operation device for a vehicle includes a position switching mechanism that is operated to mechanically switch a shift position of a transmission, an actuator that operates the position switching mechanism, and an operation for detecting an operation state of a shift operation unit by a driver. Position detection unit, actual position detection unit for detecting the operating state of the position switching unit, control unit for switching the shift position of the transmission by driving the actuator according to the detection signals of both detection units, and operation position detection An operation position presenting unit that presents the operation status of the shift position of the driver in accordance with the detection signal of the unit.

According to this vehicle shift operation device, when the driver operates the shift operation unit, the actuator is grasped based on the detection state of both detection units and the operation state of the position switching mechanism. Driven, the shift position of the transmission is switched by the operation of the position switching mechanism. In addition, the operation status of the shift operation unit grasped according to the detection signal of the operation position detection unit is presented to the operation position presentation unit. By providing such an operation position presenting unit, the driver can surely recognize the operation situation performed by the driver. In particular, when an operation element of a momentary system (a switch that returns to the neutral position after the operation of shift switching by the driver) is adopted for the shift operation unit, it is difficult to judge the operation status from the appearance. By providing this, the driver can be made to accurately recognize the operation status.
JP 2002-264684 A

  However, if the indicator itself, which is the display unit, is broken, or if the signal line for display is broken or short-circuited, the shift position switching operation of the automatic transmission is performed normally, but the current shift position is displayed on the indicator. It is not displayed at all or not displayed correctly. For this reason, the driver cannot recognize the current shift position of the automatic transmission.

  The present invention has been made in order to solve the above-described problems, and an object of the present invention is to move a mechanical element by an actuator based on an electrical signal in accordance with an operation by a driver, and to select a plurality of shift positions. In a shift-by-wire shift control system that switches from one shift position to one corresponding to an operation, a shift display device that can notify the driver of the current shift position even if a malfunction occurs on the display unit Is to provide.

  A shift display device according to a first aspect displays a shift position of an automatic transmission mounted on a vehicle. In the automatic transmission, based on an electrical signal in accordance with an operation by a driver, a mechanical element is moved by an actuator to be switched from a plurality of shift positions to one shift position corresponding to the operation. This shift display device is connected to an indicating member that indicates one of a plurality of shift positions, an indicating member, and the mechanical element by mechanically transmitting the movement of the mechanical element. And a connecting mechanism for moving the indicating member so that the driver can recognize the actual shift position of the aircraft.

  According to the first aspect of the present invention, the automatic transmission switches the mechanical element from the plurality of shift positions to one shift position corresponding to the operation by moving the mechanical element by the actuator based on the electrical signal according to the operation by the driver. Shift switching is controlled by a shift-by-wire system. At this time, for example, the shaft (mechanical element) is rotated by an actuator (electric motor or hydraulic device) so that the plate (mechanical element) for determining the shift position rotates by an angle corresponding to each shift position. The rotation of the shaft is transmitted to the indicating member via the coupling mechanism. The indicating member indicates a character in which a shift position corresponding to the angle is specified. Thereby, instead of / in addition to displaying the shift position by an electrical signal, the current shift position of the automatic transmission can be displayed mechanically. As a result, it is possible to provide a shift display device capable of notifying the driver of the current shift position even if a failure relating to the display unit of the shift control system occurs.

  In the shift display device according to the second aspect of the invention, in addition to the configuration of the first aspect, the automatic transmission can respond to an operation from a plurality of shift positions by rotating the rotating shaft forward and backward by an actuator. Can be switched to one shift position. The coupling mechanism includes a mechanism that converts rotation of the rotation shaft into movement of the pointing member.

  According to the second aspect of the invention, the shaft (machine element) is rotated by the actuator so that the plate (machine element) for determining the shift position is rotated forward or reverse by an angle corresponding to each shift position. The normal rotation and reverse rotation of the shaft are transmitted to the indicating member via the coupling mechanism. The indicating member indicates a character in which a shift position corresponding to the angle is specified. Thereby, instead of / in addition to displaying the shift position by an electrical signal, the current shift position of the automatic transmission can be displayed mechanically.

  In the shift display device according to the third aspect of the invention, in addition to the configuration of the second aspect of the invention, the connecting mechanism connects the rotating disc provided on the rotating shaft, the outer peripheral portion of the rotating disc, and the indicating member. Link mechanism.

  According to the third aspect of the invention, the indicating member can be moved by the rotating disk that is provided on the rotating shaft (shaft) and that is a power component of the link mechanism.

  A shift display device according to a fourth aspect of the invention further includes a display unit for displaying an actual shift position of the automatic transmission based on an electrical signal, in addition to the configuration of any one of the first to third aspects of the invention.

  According to the fourth aspect of the present invention, the driver can be notified of the actual shift position of the automatic transmission even if the display unit that displays the shift position based on the electrical signal breaks down.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. In the following description, the same parts are denoted by the same reference numerals. Their names and functions are also the same. Therefore, detailed description thereof will not be repeated.

  FIG. 1 shows a configuration of a shift control system 10 including a shift display device for an automatic transmission according to the present embodiment. In the present embodiment, the shift position can be recognized visually by the driver by a mechanical link mechanism that operates in conjunction with the manual shaft of the shift control system.

  This shift control system 10 is used for switching the shift position of a vehicle. The shift control system 10 includes a P switch 20, a shift switch 26, a vehicle power switch 28, a vehicle control device (hereinafter referred to as “EFI-ECU”) 30, a parking control device (hereinafter referred to as “SBW (Shift By Wire) −). ECU ”40, actuator (motor) 42, encoder 46, shift control mechanism 48, display unit 50, meter 52, and drive mechanism 60. The shift control system 10 functions as a shift-by-wire system that switches the shift position by electrical control. Specifically, the shift control mechanism 48 is driven by the actuator 42 to switch the shift position.

  The vehicle power switch 28 is a switch for switching on / off of the vehicle power. The vehicle power switch 28 is not particularly limited, and is, for example, an ignition switch. An instruction received from a user such as a driver by the vehicle power switch 28 is transmitted to the EFI-ECU 30. For example, when the vehicle power switch 28 is turned on, power is supplied from an auxiliary battery (not shown), and the shift control system 10 is activated.

  The P switch 20 has a shift position as a parking position (hereinafter referred to as “P position”) and an R position, N position, and D position (hereinafter referred to as “non-P position”) other than parking. And includes an indicator 22 for indicating the state of the switch to the driver, and an input unit 24 for receiving an instruction from the driver. The driver inputs an instruction to put the shift position into the P position through the input unit 24. The input unit 24 may be a momentary switch. The instruction from the driver received by the input unit 24 is transmitted to the SBW-ECU 40 through the EFI-ECU 30 and the EFI-ECU 30. In addition, the shift position may be switched from the non-P position to the P position by means other than the P switch 20 described above.

  The SBW-ECU 40 controls the operation of the actuator 42 that drives the shift control mechanism 48 to switch the shift position between the P position and the non-P position, and presents the current shift position state to the indicator 22. When the driver depresses the input unit 24 when the shift position is the non-P position, the SBW-ECU 40 switches the shift position to the P position and presents the indicator 22 that the current shift position is the P position.

  The actuator 42 is configured by a switched reluctance motor (hereinafter referred to as “SR motor”), and drives the shift control mechanism 48 in response to an instruction from the SBW-ECU 40. The encoder 46 rotates integrally with the actuator 42 and detects the rotation state of the SR motor. The encoder 46 of the present embodiment is a rotary encoder that outputs A-phase, B-phase, and Z-phase signals. The SBW-ECU 40 obtains a signal output from the encoder 46, grasps the rotation state of the SR motor, and controls energization for driving the SR motor.

  The shift switch 26 switches the shift position to a position such as a drive position (D), a reverse position (R), a neutral position (N), a brake position (B), or the P position when it is in the P position. It is a switch for canceling. The instruction from the driver received by the shift switch 26 is transmitted to the EFI-ECU 30. The EFI-ECU 30 performs control to switch the shift position in the drive mechanism 60 based on an instruction from the driver, and presents the current shift position state to the meter 52. The drive mechanism 60 is composed of a continuously variable transmission mechanism, but may be composed of a stepped transmission mechanism.

  The EFI-ECU 30 comprehensively manages the operation of the shift control system 10. Display unit 50 displays instructions, warnings, and the like for the driver issued by EFI-ECU 30 or SBW-ECU 40. The meter 52 presents the state of the vehicle equipment, the state of the shift position, and the like.

  Further, a mechanical link mechanism 600 is provided on the manual shaft 102 of the shift control mechanism 48. The mechanical link mechanism 600 operates in conjunction with the rotation of the manual shaft 102, and indicates the current shift position on the position display unit 500 with, for example, an arrow. Details of the manual shaft 102 and the mechanical link mechanism 600 will be described later.

  As shown in FIG. 2, the shift switch 26 includes, for example, a shift lever 1102, a first groove 1104 in which the shift lever 1102 is slid, a second groove 1106 in which the shift lever 1102 is slid, A third groove 1108 in which the lever 1102 is slid and a fourth groove 1110 in which the shift lever 1102 is slid are configured.

  The shift lever 1102 reaches the terminal end (lower end) along the first groove 1104, and the brake lever 1102 is set to the brake position by being held by the driver for a predetermined time or more. At this time, the shift lever 1102 is moved as indicated by an arrow 1126.

  The shift lever 1102 reaches the end (right end) along the second groove 1106, and the neutral position is set by the shift lever 1102 being held by the driver for a predetermined time or more. At this time, the shift lever 1102 is moved as indicated by an arrow 1120.

  The shift lever 1102 reaches the end (right end) along the second groove 1106, and further reaches the end (upper end) along the third groove 1108, for a predetermined time. As described above, the shift lever 1102 is held by the driver to set the reverse travel position. At this time, the shift lever 1102 is moved as indicated by an arrow 1122.

  The shift lever 1102 reaches the end (right end) along the second groove 1106, and further reaches the end (lower end) along the fourth groove 1110, for a predetermined time. As described above, the forward drive position is set by holding the shift lever 1102 by the driver. At this time, the shift lever 1102 is moved as indicated by an arrow 1124.

  The shift lever 1102 of the shift switching device 1110 shown in FIG. 2 indicates that the driver is in a neutral position in a state where the driver has released his / her hand from the shift lever 1102. That is, as shown in FIG. 2, when the shift lever 1102 in the neutral position is moved as indicated by an arrow 1120, the automatic transmission is moved to a neutral position where the automatic transmission is in a neutral state as indicated by an arrow 1122. It is a forward travel position where the automatic transmission is in the forward travel state by moving it to the forward travel position by moving it to the reverse travel position in the reverse travel state as indicated by arrow 1124, and the engine brake operating state Is set to the brake position. In the following description, the description of the brake position (B position) is omitted.

  FIG. 3 shows the configuration of the shift control mechanism 48. Shift positions include P and non-P positions (including R, N, and D positions. In addition to the D position, the D1 position is fixed at the first speed, and the D2 position is fixed at the first and second speeds (may be fixed at the second speed). (2 ranges) may also be included). The shift control mechanism 48 includes a manual shaft 102 rotated by an actuator 42, a detent plate 100 that rotates as the manual shaft 102 rotates, a rod 104 that operates as the detent plate 100 rotates, and an output shaft of a transmission (not shown). A parking gear 108 fixed to the parking gear 108, a parking lock pole 106 for locking the parking gear 108, a detent spring 110 and a roller 112 for limiting the rotation of the detent plate 100 and fixing the shift position. The detent plate 100 functions as a shift unit that is driven by the actuator 42 to switch the shift position. The manual shaft 102, the detent plate 100, the rod 104, the detent spring 110, and the rollers 112 serve as a shift switching mechanism. Further, the encoder 46 acquires a count value corresponding to the rotation amount of the actuator 42.

  In the perspective view of FIG. 3, only the valley (P position position) of the detent plate 100 is shown, but actually, as shown in the enlarged plan view of FIG. 3, the detent plate 100 includes D, N, There are four valleys corresponding to the four positions of R and P.

  FIG. 3 shows a state when the shift position is a non-P position. In this state, since the parking lock pole 106 does not lock the parking gear 108, the rotation of the drive shaft of the vehicle is not hindered. When the manual shaft 102 is rotated clockwise by the actuator 42 from this state, the rod 104 is pushed through the detent plate 100 in the direction of the arrow A shown in FIG. The parking lock pole 106 is pushed up in the direction of arrow B shown in FIG. As the detent plate 100 rotates, one of the four valleys provided at the top of the detent plate 100, that is, the roller 112 of the detent spring 110 in the non-P position position 120, climbs over the mountain 122 and moves to the other valley. That is, the process moves to the P position position 124. The roller 112 is provided on the detent spring 110 so as to be rotatable in its axial direction. When the detent plate 100 rotates until the roller 112 reaches the P position position 124, the parking lock pole 106 is pushed up to a position where it engages with the parking gear 108. Thereby, the drive shaft of the vehicle is mechanically fixed, and the shift position is switched to the P position.

  In the shift control system 10, the SBW-ECU 40 is configured so that the roller 112 of the detent spring 110 has a peak 122 in order to reduce the load related to the shift switching mechanism such as the detent plate 100, the detent spring 110 and the manual shaft 102 when the shift position is switched. The amount of rotation of the actuator 42 is controlled so as to reduce the impact when falling over the vehicle.

  In such a shift control system 10, the manual shaft 102 is provided with a mechanical link mechanism 600. The mechanical link mechanism 600 includes a disc 602 having the same central axis as the rotation axis of the manual shaft 102, and a link mechanism is provided on the peripheral edge of the disc 602. The link mechanism is connected to an arrow on the position display unit 500. The mechanical link mechanism 600 is configured to operate in response to the manual shaft 102 being rotated by the actuator 42 so that the arrow of the position display unit 500 indicates a position corresponding to the position of the automatic transmission. .

  The structure of the mechanical link mechanism 600 will be described in more detail with reference to FIGS. 4 shows the case where the shift position is the D position, FIG. 5 shows the case where the shift position is the N position, FIG. 6 shows the case where the shift position is the R position, and FIG. 7 shows the case where the shift position is the P position. Yes.

  As shown in these drawings, the mechanical link mechanism 600 includes a disk 602 that is a power component connected to the manual shaft 102, a first movable pin 604 provided on the outer periphery of the disk 602, A first rod 606 connected to the disk 602 by the first movable pin 604, a second movable pin 608 provided at a predetermined position of the first rod 606, and a second movable pin 608 And a second rod 612 connected to one rod 606. Further, the mechanical link mechanism 600 includes a fixing pin 610 that fixes a predetermined position of the second rod 612.

  An arrow plate 502 of the position display unit 500 is connected to the second rod 612. The position display section 500 is provided with a D position plate 504 indicating the D position, an N position plate 506 indicating the N position, an R position plate 508 indicating the R position, and a P position plate 510 indicating the P position.

  The position plate and the mechanical linkage 600 and the detent plate 100 are position plates corresponding to the position positions when the detent plate 100 is in each position position (the position of the valley of the detent plate 100). Is designed so that the arrow plate 502 points to the point. The link mechanism is not limited to this. Further, a steel wire other than the rod may be used.

  The operation of the shift control system 10 including the shift display device for an automatic transmission according to the present embodiment having the above-described structure will be described with reference to FIGS.

[When shifting to D position]
When the driver operates the shift switch 26 to shift the shift position from any one of P, R, and N to the D position, the manual shaft 102 is rotated by the actuator 42. At this time, the actuator 42 rotates the manual shaft 102 until the roller 112 reaches the valley of the D position of the detent plate 100.

  When the manual shaft 102 is rotated, the disk 602 is also rotated by the same angle, and when the manual shaft 102 reaches the D position position of the disk 602 as shown in FIG. 4, it passes through the first movable pin 604 provided on the disk 602. Then, the first rod 606 moves to a position corresponding to the D position, and the second rod 612 is fixed to the fixed pin 610 via the second movable pin 608 provided on the first rod 606. To the position corresponding to the D position. This position is a position where the arrow plate 502 points to the D position plate 504 of the position display section 500.

  As described above, when the shift is switched from the non-D position (P position, R position, or N position) to the D position, the arrow plate 502 pointing to a position other than the D position plate 504 of the position display section 500 becomes D. Since the position changes so as to indicate the position plate 504, the driver can recognize that the current shift position of the automatic transmission is the D position. At this time, even if the meter 52 itself that electrically displays the shift position is faulty or the signal that causes the meter 52 to display the shift position is abnormal, the driver must confirm that the current shift position of the automatic transmission is the D position. Can be recognized.

[When shifting from D position to N position]
In this state, when the driver operates the shift switch 26 to shift to the N position, the actuator 42 rotates the manual shaft 102 until the roller 112 reaches the valley of the N position of the detent plate 100. At this time, the disk 602 rotates from the state shown in FIG. 4 to the state shown in FIG.

  When the manual shaft 102 is rotated, the disk 602 is also rotated by the same angle, and when it reaches the N position of the disk 602, as shown in FIG. 5, it passes through the first movable pin 604 provided on the disk 602. Then, the first rod 606 moves to the position corresponding to the N position, and the second rod 612 is fixed to the fixed pin 610 via the second movable pin 608 provided on the first rod 606. To the position corresponding to the N position. This position is a position where the arrow plate 502 points to the N position plate 506 of the position display section 500.

  Thus, when the shift is switched from the D position to the N position, the arrow plate 502 pointing to the D position plate 504 of the position display unit 500 changes so as to point to the N position plate 506. It can be recognized that the current shift position is the N position. At this time, even if the meter 52 itself that electrically displays the shift position is out of order or the signal that causes the meter 52 to display the shift position is abnormal, the driver must confirm that the current shift position of the automatic transmission is the N position. Can be recognized.

[When shifting from N position to R position]
In this state, when the driver operates the shift switch 26 to shift to the R position, the actuator 42 rotates the manual shaft 102 until the roller 112 reaches the valley of the R position of the detent plate 100. At this time, the disk 602 rotates from the state shown in FIG. 5 to the state shown in FIG.

  When the manual shaft 102 is rotated, the disk 602 is also rotated by the same angle, and when it reaches the R position position of the disk 602, as shown in FIG. 6, it passes through the first movable pin 604 provided on the disk 602. Then, the first rod 606 moves to a position corresponding to the R position, and the second rod 612 is fixed to the fixed pin 610 via the second movable pin 608 provided on the first rod 606. To the position corresponding to the R position. This position is a position where the arrow plate 502 points to the R position plate 508 of the position display section 500.

  Thus, when the shift is switched from the N position to the R position, the arrow plate 502 pointing to the N position plate 506 of the position display section 500 changes so as to point to the R position plate 508. It can be recognized that the current shift position is the R position. At this time, even if the meter 52 itself that electrically displays the shift position is out of order or the signal that causes the meter 52 to display the shift position is abnormal, the driver must confirm that the current shift position of the automatic transmission is the R position. Can be recognized.

[When shifting to P position]
When the driver depresses the input unit 24 of the P switch 20 and shifts to the P position when in the non-P position, the actuator 42 moves the manual shaft 102 until the roller 112 reaches the P position valley of the detent plate 100. Rotate. At this time, the disk 602 rotates to the state shown in FIG.

  When the manual shaft 102 is rotated, the disk 602 is also rotated by the same angle, and when it reaches the P position position of the disk 602 as shown in FIG. 7, it passes through the first movable pin 604 provided on the disk 602. Then, the first rod 606 moves to the position corresponding to the P position, and the second rod 612 is fixed to the fixed pin 610 via the second movable pin 608 provided on the first rod 606. To the position corresponding to the P position. This position is a position where the arrow plate 502 points to the P position plate 510 of the position display unit 500.

  As described above, when the shift is switched from the non-P position (shift position of any one of the D position, the N position, and the R position) to the P position, the arrow plate 502 pointing to other than the P position plate 510 of the position display unit 500 is changed to P. Since the position changes so as to indicate the position plate 510, the driver can recognize that the current shift position of the automatic transmission is the P position. At this time, even if the meter 52 itself that electrically displays the shift position is faulty or the signal that causes the meter 52 to display the shift position is abnormal, the driver must confirm that the current shift position of the automatic transmission is the P position. Can be recognized.

  As described above, according to the shift display device according to the present embodiment, in the shift-by-wire shift control system, the indicator that electrically displays the shift position itself has failed or is connected to the indicator. Even if the display control signal line is disconnected or short-circuited, the current shift position can be notified to the driver. Needless to say, the position display unit 500 is provided at a position where the driver can easily recognize it visually.

  The embodiment disclosed this time should be considered as illustrative in all points and not restrictive. The scope of the present invention is defined by the terms of the claims, rather than the description above, and is intended to include any modifications within the scope and meaning equivalent to the terms of the claims.

It is a figure which shows the structure of the shift control system 10 which concerns on embodiment of this invention. It is a figure which shows the structure of the shift switch 26 of FIG. It is a figure which shows the structure of the shift control mechanism 48 of FIG. It is a figure which shows the state of the mechanical link mechanism in D position. It is a figure which shows the state of the mechanical link mechanism in N position. It is a figure which shows the state of the mechanical link mechanism in R position. It is a figure which shows the state of the mechanical link mechanism in P position.

Explanation of symbols

  10 shift control system, 20 P switch, 22 indicator, 24 input unit, 26 shift switch, 28 vehicle power switch, 30 EFI-ECU, 40 SBW-ECU, 42 actuator, 46 encoder, 48 shift control mechanism, 50 display unit, 52 meter, 60 drive mechanism, 70 shift system power supply abnormality detection unit, 100 detent plate, 102 manual shaft, 104 rod, 106 parking lock pole, 108 parking gear, 110 detent spring, 112 rollers, 120 non-P position position, 122 mountains 124 P position, 500 position display, 600 mechanical linkage.

Claims (4)

A shift display device for an automatic transmission mounted on a vehicle, wherein the automatic transmission moves a mechanical element by an actuator based on an electrical signal in accordance with an operation by a driver, from among a plurality of shift positions. Switched to one shift position corresponding to the operation,
The shift display device
An instruction member indicating one of the plurality of shift positions by mechanically transmitting the movement of the mechanical element;
A display device for an automatic transmission, comprising: a connecting mechanism that is connected to the indicating member and the mechanical element and moves the indicating member so that a driver can recognize an actual shift position of the automatic transmission. The automatic transmission is switched to one shift position corresponding to the operation from a plurality of shift positions by rotating the rotating shaft forward and reverse by an actuator.
The shift display device for an automatic transmission according to claim 1, wherein the coupling mechanism includes a mechanism that converts rotation of the rotating shaft into movement of the instruction member. The coupling mechanism is
A rotating disk provided on the rotating shaft;
The shift display device for an automatic transmission according to claim 2, further comprising a link mechanism connecting the outer peripheral portion of the rotating disk and the indicating member.   The shift display device for an automatic transmission according to any one of claims 1 to 3, further comprising a display unit that displays an actual shift position of the automatic transmission based on the electrical signal.

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