JP2009126227A - Shift position detection device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To avoid a shift lever from being erroneously determined to be in other shift position even when some sensors fail. <P>SOLUTION: The shift position detecting device includes a position signal output means outputting a position signal corresponding to the positional relation between a sensor operating member and a plurality of sensors and is constituted, in a transition state wherein a shift lever shifts between adjacent shift positions, for changing the position signal of the position signal output means by changing the sensors in predetermined order, wherein the order of changing the sensor is decided so that the position signal in the transition state does not approximate the position signal of a shift position other than the position signal of the shift position of the origin of shifting or of the destination of shifting even when some sensors fail. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention includes a sensor operation member and a plurality of sensors that are relatively movable in conjunction with the operation of the shift lever of the shift lever device, and changes the positional relationship between the sensor operation member and the plurality of sensors. The present invention relates to a shift position detecting device configured to detect a shift position of the shift lever based on the position signal in a configuration in which a position signal that is a combination of output signals of the plurality of sensors is changed.

A related shift position detection device related to this is described in Japanese Patent Application Laid-Open No. H10-228707.
In this shift position detecting device, a magnet is attached to the shift lever side of the shift lever device, and four Hall ICs for detecting a magnetic field are attached to the housing side. For this reason, when the shift lever is in each of the P, F, D, N, and R shift positions, the magnet and the four Hall ICs have a positional relationship corresponding to each shift position. Then, corresponding to the positional relationship between the magnet and the four Hall ICs, those Hall ICs are turned on (1) / off (0). That is, the combinations in which the four Hall ICs are turned on (1) and turned off (0) differ depending on each shift position, and each shift position is detected from these combinations.

JP 2004-138235 A

The shift position detection device described above is configured to detect each shift position from the combination of on (1) and off (0) of the four Hall ICs. However, if the combination (position signal) of the four Hall ICs on (1) and off (0) deviates from the normal position signal representing each shift position, is the shift lever being operated (transition state)? Or it is impossible to judge whether the sensor is faulty.
Also, when a part of the Hall IC breaks down, the position signal in the transition state is closer to the normal position signal of another shift position than the normal position signal of the shift position of the movement start point or the shift position of the movement destination. If you want to. For this reason, there is a possibility that it is erroneously determined that the shift position is completely different from the actual position of the shift lever.

  The present invention has been made to solve the above-described problems, and the problem to be solved by the present invention is that the shift lever is in a different shift position even if a part of the sensor fails. Is not to be done.

The above-described problems are solved by the inventions of the claims.
The invention of claim 1 includes a sensor operation member and a plurality of sensors that are relatively movable in conjunction with the operation of the shift lever of the shift lever device, and the positional relationship between the sensor operation member and the plurality of sensors. A shift position detecting device configured to detect a shift position of the shift lever based on the position signal, wherein the position signal that is a combination of output signals of the plurality of sensors is changed. Position signal output means for outputting a position signal corresponding to the positional relationship with the plurality of sensors, and in a transition state in which the shift lever moves between adjacent shift positions, the sensors change in a predetermined order. The position signal of the position signal output means changes, and a part of Even when the sensor is in failure, the position signal in the transition state is not approximated to the position signal of another shift position than the position signal of the shift position of the movement start point or the shift position of the movement destination. The order in which the sensors change is determined.

  According to the present invention, even when some of the sensors are in failure, the position signal in the transition state is closer to the position signal of another shift position than the position signal of the shift position of the movement start point or the shift position of the movement destination. The order in which the sensors change is determined so that nothing happens. In other words, since the position signal in the transition state is the closest to the shift signal at the movement start point or the shift position at the movement destination, even if a part of the sensor breaks down, the shift lever appears to be in another shift position. Will not be misjudged.

According to the invention of claim 2, a plurality of sensors are divided into groups of several, and a power source is provided for each of the groups. Even when all the sensors of one group are in failure, the position in the transition state The order in which the sensors change is determined so that the signal does not approximate the position signal of another shift position rather than the position signal of the shift position of the movement start point or the shift position of the movement destination. And
For this reason, even when all the sensors of one group are out of order, it is not erroneously determined that the shift lever is in another shift position.

According to the invention of claim 3, the plurality of sensors are divided into groups of several, and a power source is provided for each of the groups. When all the sensors of one group are in failure, the sensors in the transition state In the case of the change order of the sensors, the position signal may be more similar to the position signal of another shift position than the position signal of the shift position of the movement start point or the shift position of the movement destination. Abnormality processing is performed after all sensor failures are detected.
That is, when all the sensors in one group are in failure, abnormal processing is performed after the failure of those sensors is detected, so even if the shift lever may be erroneously determined to be in another shift position. Safety is ensured.

  According to the present invention, even if a part of the sensor fails, the shift lever is not erroneously determined to be in another shift position, so that the safety of the passenger car is ensured.

[Embodiment 1]
Hereinafter, the shift position detection device according to the first embodiment of the present invention will be described with reference to FIGS. The shift position detection device according to this embodiment is a device used in a shift lever device of a vehicle, and FIG. 1 to FIG. 3 show a cross-sectional view and an overall perspective view of a shift lever device including a shift position detection device. . FIG. 4 is an exploded perspective view of the shift position detecting device, and FIGS. 5 and 6 are diagrams showing the operation of the shift position detecting device. 7 to 10 are a list showing a shift position determination method and the like, an operation flowchart of the shift position detection device, and the like.
In addition, front and rear, left and right and up and down in the figure correspond to front and rear, left and right and up and down of the vehicle.

<About the outline of the shift lever device 10>
First, an outline of the shift lever device 10 will be described before the shift position detection device 50 is described.
The shift lever device 10 is, for example, a shift-by-wire shift lever device used in a hybrid vehicle, and includes a housing 12 and a shift lever 30 that are substantially trapezoidal in a side view as shown in FIGS. Yes. Here, FIG. 2 represents a cross-sectional view taken along arrow II-II in FIG.
The housing 12 is provided with a shift shaft 16 extending in the left-right direction below the side plate portions 14 of the housing 12. A support member 20 is supported on the shift shaft 16 so as to be rotatable in the shift direction (front-rear direction) in the housing 12. The support member 20 is formed in a flat box shape with an open top, and the lever base portion 32 of the shift lever 30 is formed on the support member 20 in the select direction (left and right) as shown in FIG. It is stored so that it can move in the direction). The upper opening of the support member 20 is closed by a lid member 25 having a through hole 26 through which the shift lever 30 and the like are inserted.
That is, the shift lever 30 is movable in the shift direction (front-rear direction) and the select direction (left-right direction) with respect to the housing 12 by the action of the lever base 32, the support member 20, and the shift shaft 16.

As shown in FIG. 1, an interlocking arm 33 protruding rearward is attached to the rear side surface 32 b of the lever base portion 32 of the shift lever 30. The interlocking arm 33 protrudes rearward through the notch recess 22 of the support member 20, and the protruding end 33r of the interlocking arm 33 is connected to a sensor operation member 53 of a shift position detecting device 50 (described later). ing.
Further, as shown in FIG. 2 and the like, a plunger 34 is incorporated in the lever base 32 so as to be movable up and down in parallel with the shift lever 30, and the plunger 34 receives an upward biasing force by a plunger spring 35. ing. As shown in FIG. 2, the tip of the plunger 34 is pressed against the inclined cam surface 43 of the gate member 40 (described later) by the force of the plunger spring 35.

As shown in FIGS. 1 to 3, the gate member 40 is a lid-like member that closes the upper opening 12 u of the housing 12 and includes a gate hole 41 through which the shift lever 30 is passed. The gate hole 41 is formed in a cross shape corresponding to the shift pattern, and crosses the left and right shift lines extending in the vertical direction and the right shift line in a cross shape as shown in FIG. And a select line connected to the left shift line.
In the gate hole 41, an H (home) position is set at the intersection between the right shift line and the select line, and an N (neutral) position is set at the intersection between the left shift line and the select line. . An R (reverse) position is set on the front side of the left shift line, and a + (shift up) position is set on the front side of the right shift line. Further, a-(shift down) position is set behind the right shift line, and a D (drive) position is set at the right end of the select line.
Here, as described above, the plunger 34 abuts against the inclined cam surface 43 of the gate member 40 under the force of the plunger spring 35 as shown in FIG. For this reason, when the shift lever 30 attempts to move the select line from the center to the right (H → D) or from the center to the left (N ← H), the inclined cam surface 43 acts to move the plunger 34 downward. Then, the plunger spring 35 is pressed and contracted. As a result, the shift lever 30 receives a force in the center direction (H direction) by the force of the plunger spring 35 and the action of the inclined cam surface 43. That is, when the operating force of the shift lever 30 is released, the shift lever 30 returns to the H position that is the reference position by the force of the plunger spring 35.

<About the shift position detection device 50>
The shift position detection device 50 is a device that electrically detects the shift position selected by the shift lever 30 and outputs a position signal that is a position detection signal. As shown in FIG. 1, the shift position detection device 50 is attached to a detection device attachment portion 13 e formed on the rear inclined plate 13 of the housing 12. As shown in FIG. 4A, the shift position detection device 50 includes a housing case 51 formed in a shallow box shape, and a holder member 55 fitted in a lid shape on the opening side of the housing case 51. . The sensor substrate 52, the sensor operation member 53, and the relay member 54 are accommodated in a space formed by the accommodation case 51 and the holder member 55.
The sensor substrate 52 is a substrate provided with a plurality (seven in the figure) of position detection sensors 60 made of a Hall IC that detects a magnetic field, for example, and is fixed to the bottom surface side of the housing case 51.

  As will be described later, the sensor operation member 53 is a plate-like member for operating the position detection sensor 60, and can be slid in the vertical direction and the horizontal direction with respect to the holder member 55 via the relay member 54. It is attached with. The sensor operation member 53 is arranged in parallel with the sensor substrate 52 at a predetermined interval, and the engagement cylinder portion 53 t formed on the back surface of the sensor operation member 53 is an opening of the holder member 55. It projects forward and downward from 55h. As shown in FIG. 1, the protruding end 33 r of the interlocking arm 33 formed on the lever base portion 32 of the shift lever 30 is connected to the engaging cylinder portion 53 t of the sensor operation member 53. Thereby, the sensor operation member 53 is interlocked with the shift lever 30, and the positional relationship between the position detection sensor 60 of the sensor substrate 52 and the sensor operation member 53 changes depending on the position of the shift lever 30.

<Regarding Arrangement of Position Detection Sensor 60 and Member 53 for Sensor Operation>
As shown in FIG. 4 and FIG. 1-No. 7 position detection sensors 60 (hereinafter referred to as No. 1 to No. 7 sensors) are positioned at predetermined positions. No. 1-No. The 7 sensor is configured to detect only a magnetic field in a predetermined direction, and is configured to output an on signal (1) when the magnetic field is detected and an off signal (0) when the magnetic field is not detected. ing. No. 1-No. 4 sensors are in the first group, No. 4; 5-No. Seven sensors are in the second group, and a power source is provided for each group.
As shown in FIG. 6A, the surface of the sensor operation member 53 is divided into 12 rows and 13 columns, and the third row, the fifth row, the eighth row, and the tenth row are vertically arranged in the figure. It is divided into three parts. Further, the second column, the fourth column, the sixth column, the eighth column, the tenth column, and the twelfth column are divided into three in the horizontal direction in the figure. The colored portion is a reaction region, and the blank portion is a non-reaction region. Here, the reaction region (colored portion) is a region that outputs an ON signal (1) when the sensor faces, and the non-reaction region (blank portion) outputs an OFF signal (0) when the sensor faces. It is an area. 6A shows the sensor operation member 53 viewed from the same side as the operation direction of the shift lever 30. FIG.

  6A shows the positional relationship between the sensor substrate 52 (No. 1 to No. 7 sensor) and the sensor operation member 53 when the shift lever 30 is at the H (home) position. At this time, no. Since one sensor faces the reaction region (colored portion), it outputs an on signal (1). No. Since the two sensors face the non-reactive area (blank part), an off signal (0) is output. Similarly, no. 3 sensor is ON signal (1), No.3. 4 sensor is ON signal (1), No.4. 5 sensor is off signal (0), no. 6 sensor is ON signal (1), No. 6 sensor. 7 sensor outputs an off signal (0). Therefore, the combination of the sensor output signals when the shift lever 30 is in the H position, that is, the normal position signal is “101010” as shown in the table of FIG.

As shown in FIG. 6A, when the shift lever 30 is operated to the D (drive) position side when the shift lever 30 is in the H position, the sensor operation member 53 is moved to the position No. of the sensor substrate 52. 1-No. Move to the right with respect to 7 sensors. When the shift lever 30 reaches the D position, as shown in FIG. 6B, the sensor operation member 53 is shifted to the right by two rows. As a result, the combination of sensor output signals when the shift lever 30 is in the D position, that is, the normal position signal is “0110011” as shown in the table of FIG.
Here, when the shift lever 30 moves from the H position to the D position, first, as shown in the hatched portion of the sensor operation sequence list of FIG. 1 sensor operates, then No. 7 sensor operates, and then 4 sensors, and finally The reaction region and the non-reaction region of the sensor operation member 53 are set so that the two sensors operate (operation order 1742).

Next, when the shift lever 30 is operated from the H position to the N position side, the sensor operation member 53 is moved to No. of the sensor substrate 52. 1-No. With respect to 7 sensors, in FIG. 6 (A), it moves 2 rows in the left direction. Therefore, the normal position signal when the shift lever 30 is in the N (neutral) position is “1010101” as shown in the table of FIG.
Here, when the shift lever 30 moves from the H position to the N position, as shown in the hatched portion of the sensor operation order list of FIG. 7 sensor operates, No. 5 sensor operates, then No. 5 4 sensors, and finally The reaction region and the non-reaction region of the sensor operation member 53 are set so that the six sensors operate (operation order 7546).
Next, when the shift lever 30 is operated from the N position to the R position side, the sensor operation member 53 is moved to No. of the sensor substrate 52. 1-No. Move 7 rows upward from the N (neutral) position for 7 sensors. Therefore, the normal position signal when the shift lever 30 is in the R (reverse) position is “0111100” as shown in the table of FIG.
Here, when the shift lever 30 moves from the N position to the R position, as shown in the hatched portion of the sensor operation order list, the No. 1 sensor operates, then No. No. 4 sensor operates, then No. 7 sensors, and finally The reaction region and non-reaction region of the sensor operation member 53 are set so that the two sensors operate (operation order 1472).

Next, when the shift lever 30 is operated from the H position to the + position side, the sensor operation member 53 is moved to No. of the sensor substrate 52. 1-No. In FIG. 6 (A), the 7 sensors are moved upward by two lines. Therefore, the normal position signal when the shift lever 30 is in the + position is “1101001” as shown in the table of FIG.
Here, when the shift lever 30 moves from the H position to the + position, as shown in the hatched portion of the sensor operation order list, first, No. 3 sensor operates, 7 sensor operates, and then 6 sensors, and finally No. The reaction region and the non-reaction region of the sensor operation member 53 are set so that the two sensors operate (operation order 3762).
Next, when the shift lever 30 is operated from the H position to the -position side, the sensor board 52 No. 1-No. The sensor operation member 53 is moved downward by two lines in FIG. Therefore, the normal position signal when the shift lever 30 is in the negative position is “1100110” as shown in the table of FIG.
Here, as shown in the hatched portion of the sensor operation order list, when the shift lever 30 moves from the H position to the-position, the No. 3 sensor operates, No. 4 sensor operates, then No. 2 sensors, and finally The reaction region and the non-reaction region of the sensor operation member 53 are set so that the five sensors operate (operation order 3425).
That is, the above-mentioned No. 1-No. A sensor substrate 52 having seven sensors corresponds to the position signal output means of the present invention.

A position signal (hereinafter referred to as a detected position signal) output from the sensor substrate 52 is input to the control unit 100 as shown in FIG. The control unit 100 is a part that determines a shift position from the detected position signal and determines normality / abnormality of each sensor. Moreover, the control part 100 is comprised so that the abnormality process part 103 can be operated at the time of abnormality.
Further, a normal position signal when the shift lever 30 is in each shift position (H, +,-, N, R, D) and a sensor in a transition state where the shift lever 30 moves between adjacent shift positions. The operation order and the like are stored in the memory 101.
In addition, the control unit 100 is provided with a first timer that adjusts the time until the abnormality processing unit 103 is operated in the event of an abnormality.

<About the shift position judgment method when the sensor is normal>
Next, based on FIG. 8, a detection position signal when the sensor is normal when the shift lever 30 moves from the H position to the D position (sensor operation sequence 1742) and a shift position determination method based on the detection position signal. explain.
The detected position signal in the transition state when the shift lever 30 moves from the H position to the D position is shown on the right side of the column without failure (sensor normal) in FIG. That is, no. 1-No. Reference numeral 7 denotes a sensor column, and a detection position signal “1011010” for the H position is written to the right of the symbol H. Similarly, a detection position signal “0110011” of the D position is written on the right side of D. When the shift lever 30 moves from the H position to the D position between the H position detection position signal “1011010” and the D position detection position signal “0110011” (symbol Δ1 to symbol Δ3) ( The transition position) detection position signal is described. That is, when the shift lever 30 moves from the H position to the D position, first, as shown in the detection position signal of symbol Δ1, No. One sensor is switched from the on signal (1) to the off signal (0). Next, as shown in the detected position signal of symbol Δ2, No. 7 sensor is switched from the off signal (0) to the on signal (1), and as shown in the detected position signal of symbol Δ3, The four sensors are switched from the on signal (1) to the off signal (0). Finally, as shown in the detected position signal of the D position, No. Two sensors are switched from the off signal (0) to the on signal (1). That is, the sensor operation sequence when the shift lever 30 moves from the H position to the D position is 1742 (see the hatched portion in FIG. 7).
In this case, the H position corresponds to the shift position of the movement start point of the present invention, and the D position corresponds to the shift position of the movement destination.

Here, the number of mismatches shown at the right end of FIG. 8 represents the number of mismatches of the normal position signals of the respective shift positions with respect to the respective detected position signals on the left side. For example, since the number of mismatches of the normal position signal of the H position with respect to the detected position signal of the H position is 0 when each sensor is in a normal state (no failure), the number of mismatches in the symbol H column is “0”. Further, since the number of mismatches of the normal position signal of the D position with respect to the detected position signal of the H position is 4, the number of mismatches in the symbol D column is “4”. Similarly, the number of mismatches of the normal position signal of the + position with respect to the detected position signal of the H position is 4, the number of mismatches of the normal position signal of the − position is 4, the number of mismatches of the normal position signal of the N position is 4, and R Since the number of mismatches in the normal position signal of the position is 4, the number of mismatches in the symbol + column is “4”, the number of mismatches in the symbol-column is “4”, the number of mismatches in the symbol N column is “4”, and the symbol The number of mismatches in the R column is “4”. Then, the shift position having the smallest mismatch number is determined as the shift position for the detected position signal.
That is, when each sensor is in a normal state, the normal position signal of the H position (hereinafter referred to as the “H normal position signal”) does not match the detected position signal of the H position, and the number of mismatches of the normal position signals other than H. Is “4”, and the number of mismatches of the H normal position signal is the smallest, so that the H position is determined as a result.

In addition, with respect to the detected position signal of symbol Δ1, the number of mismatches of the + normal position signal is “5”, the number of mismatches of the H regular position signal is “1”, the number of mismatches of the −normal position signal is “5”, and the D regular The number of mismatches in the position signal is “3”, the number of mismatches in the N normal position signal is “5”, and the number of mismatches in the R normal position signal is “3”. For this reason, since the number of mismatches “1” of the H normal position is the smallest, it is determined as the H position by the detected position signal of symbol Δ1.
Further, since the number of mismatches of the H normal position signal is “2” and the number of mismatches of the D normal position signal is “2” with respect to the detected position signal of the symbol Δ2, there are a plurality of minimum mismatch numbers. The position signal is not judged.
With respect to the detected position signal of symbol Δ3, the number of mismatches of the D normal position signal is “1”, which is the smallest. Therefore, the detected position signal of symbol Δ3 is determined as the D position.
Similarly, the number of mismatches of the D normal position signal with respect to the detected position signal of the D position is “0”, which is the smallest, so that the D position is determined by the detected position signal of the D position.
Thus, when the sensor is normal, each detected position signal output from the shift position detection device 50 when the shift lever 30 is moved from the H position to the D position (sensor operation sequence 1742) is different (H And other than D) are not erroneously determined.

<Detection position signal and shift position determination method when one sensor fails>
Next, based on FIG. 8 and FIG. 9, when the shift lever 30 moves from the H position to the D position (sensor operation sequence 1742), the detected position signal at the time of sensor failure (one failure) and the detected position signal A shift position determination method based on this will be described.
When the sensor fails, the output signal of the sensor is locked to (0) or (1), and the output signal does not change even if the magnetic field by the sensor operation member 53 changes. 8 and FIG. 1-No. The state in which 7 sensors have failed is displayed in order for each sensor, divided into a case where the output signal is fixed at (0) and a case where the output signal is fixed at (1).
For example, no. Consider a case where one sensor fails and its output signal is fixed at (0). In this case, as shown in the column (Sensor 1 failure (fixed to 0)) in FIG. 8, the detected position signal of the H position is “0011010”, which is equal to the detected position signal of the symbol Δ1. For this reason, the number of mismatches of the + normal position signal with respect to the detected position signal of the H position and symbol Δ1 is “5”, the number of mismatches of the H regular position signal is “1”, and the number of mismatches of the −normal position signal is “5”. The number of mismatches of the D normal position signal is “3”, the number of mismatches of the N normal position signal is “5”, and the number of mismatches of the R normal position signal is “3”. As described above, since the number of mismatches of the H normal position signal is “1”, which is the smallest, the H position is determined as the H position based on the detected position signal of the symbol Δ1.

The detected position signal of symbol Δ2 is “00111011”, the number of mismatches of the + normal position signal with respect to this signal is “4”, the number of mismatches of the H regular position signal is “2”, and the number of mismatches of the −normal position signal is The number of mismatches of “6”, the D normal position signal is “2”, the number of mismatches of the N normal position signal is “4”, and the number of mismatches of the R normal position signal is “4”. That is, the number of mismatches in the H regular position is “2”, the number of mismatches in the D regular position signal column is “2”, and there are a plurality of minimum mismatches.
The position signal of symbol Δ3 is “0010011”, the number of mismatches of the + normal position signal with respect to this signal is “5”, the number of mismatches of the H regular position signal is “3”, and the number of mismatches of the −normal position signal is “3”. 5 ”, the number of mismatches of the D regular position signal is“ 1 ”, the number of mismatches of the N regular position signal is“ 3 ”, and the number of mismatches of the R regular position signal is“ 5 ”. That is, since the number of mismatches of the D normal position signal is “1”, which is the smallest, the D position is determined by the detected position signal of symbol Δ3.
The detected position signal of the D position is “0110011”, the number of mismatches of the + normal position signal with respect to this signal is “4”, the number of mismatches of the H regular position signal is “4”, and the number of mismatches of the −normal position signal is “4”. 4 ”, the number of mismatches of the D regular position signal is“ 0 ”, the number of mismatches of the N regular position signal is“ 4 ”, and the number of mismatches of the R regular position signal is“ 4 ”. That is, since the number of mismatches of the D normal position signal is “0”, which is the smallest, the D position is determined based on the detected position signal of the D position.
In this way, the sensor operation sequence when the shift lever 30 is moved from the H position to the D position is set to 1742. Even if one sensor breaks down and the output signal is fixed at (0), the detected position signals of H, D, and symbols Δ1 to Δ3 are different from the H and D normal position signals. ,-, N, R) is not approximated to the normal position signal. Therefore, the position of the shift lever 30 is not erroneously determined as another shift position (+, −, N, R).

No. Even when the output signal of one sensor is fixed at (1), as shown in FIG. 8, the detected position signals of H, D, and symbols Δ1 to Δ3 are +, -, N, R There is no approximation to the normal position signal. Therefore, the position of the shift lever 30 is not erroneously determined as another shift position.
Similarly, no. 2 sensors-No. Even if 7 sensors individually fail, each position signal of H, D, symbols Δ1 to Δ3 is closer to the +, −, N, R normal position signals than the H, D normal position signals. Absent. Therefore, the position of the shift lever 30 is not erroneously determined as another shift position.
That is, the sensor operation sequence when the shift lever 30 is moved from the H position to the D position is set to 1742. No. 1 sensor No. Even when one of the seven sensors breaks down and the output signal is fixed, the position of the shift lever 30 is not erroneously determined as another shift position.

<Position signal and shift position judgment method when one group of sensors fails>
Next, based on FIG. 9, when the shift lever 30 moves from the H position to the D position (sensor operation sequence 1742), a detection position signal at the time of sensor failure (one group failure), and a shift based on the detection position signal. A position determination method will be described.
For example, consider a case where all the sensors in the first group (No. 1 to 4 sensors) have failed and their output signals are fixed at (1). In this case, as shown in the column of FIG. 9 (1-4 all 1), the detected position signal of the H position is “11111010”, which is equal to the detected position signal of the symbol Δ1. For this reason, the number of mismatches of the + normal position signal with respect to the detected position signal is “3”, the number of mismatches of the H regular position signal is “1”, the number of mismatches of the −normal position signal is “3”, and the mismatch of the D regular position signal The number is “3”, the number of mismatches of the N normal position signal is “5”, and the number of mismatches of the R normal position signal is “3”. That is, since the number of mismatches of the H normal position signal is “1”, which is the smallest, the H position is determined to be the H position based on the detected position signal of symbol Δ1.
Further, the detected position signals of symbol Δ2, symbol Δ3, and D position are equal to “1111011”. Therefore, the number of mismatches between the detected position signal and the + normal position signal is “2”, the number of mismatches with the H normal position signal is “2”, the number of mismatches with the −normal position signal is “4”, and the D normal position. The number of mismatches with the signal is “2”, the number of mismatches with the N normal position signal is “4”, and the number of mismatches with the R normal position signal is “4”. That is, since there are a plurality of minimum mismatch numbers “2”, the detected position signals of the symbols Δ2, Δ3, and D are not subjected to position determination.
Thus, by setting the sensor operation sequence when the shift lever 30 is moved from the H position to the D position as 1742, the first group (No. 1 to 4) sensors fail and the output signal is (1). Even when fixed to, the detected position signals of H, D and symbols Δ1 to Δ3 are not more approximate to +, −, N, R normal position signals than H, D normal position signals. Therefore, the position of the shift lever 30 is not erroneously determined as another shift position.

Further, even when all the sensors of the first group (No. 1 to 4 sensors) fail and the output signal is fixed at (0), as shown in FIG. 9, H, D, symbols Δ1 to Δ Each detected position signal of 3 is not closer to the +, −, N, R normal position signals than the H, D normal position signals. Therefore, the position of the shift lever 30 is not erroneously determined as another shift position.
Similarly, even when all the sensors in the second group (No. 5 to No. 7 sensors) fail and the output signal is fixed to (1) or (0), as shown in FIG. , D, and the detected position signals of symbols Δ1 to Δ3 are not approximated to +, −, N, and R normal position signals than the H and D normal position signals. Therefore, the position of the shift lever 30 is not erroneously determined as another shift position.
That is, by setting the sensor operation sequence when the shift lever 30 is moved from the H position to the D position to 1742, even if all the sensors in one group have failed, the position of the shift lever 30 is mistaken for another shift position. It is not judged.
Here, FIG. 8 and FIG. 9 show an example in which the sensor operation order when the shift lever 30 is moved from the H position to the D position is 1742. However, as shown in FIG. 7, even when the sensor operation sequence is 1427, 1472, or 7142, the position of the shift lever 30 is misjudged as another shift position when one sensor fails or all faults in one group occur. It will not be done.

Even if the shift lever 30 is moved between other shift positions, the position of the shift lever 30 can be changed even if one sensor fails or all faults occur in the group by correctly setting the sensor operation sequence. There is no misjudgment as a shift position.
That is, when the shift lever 30 is moved from the H position to the N position, as shown in FIG. 7, the sensor operation order is set to 5746, 5864, 7546, or 7564, so that one of the sensors malfunctions or within the group. Even in the case of all the failures, the position of the shift lever 30 is not erroneously determined as another shift position.
When the shift lever 30 is moved from the N position to the R position, as shown in FIG. 7, the sensor operation sequence is set to 1427, 1472, 1742, or 7142, so that one of the sensors breaks down or all the members in the group are moved. Even in the case of a failure, the position of the shift lever 30 is not erroneously determined as another shift position.
When the shift lever 30 is moved from the H position to the + position, the sensor operation order is set to 3627, 3672, 3726, 3762, 6327, 6372, 7326 or 7362 as shown in FIG. Even in the case of one failure or all failures in the group, the position of the shift lever 30 is not erroneously determined as another shift position.
When the shift lever 30 is moved from the H position to the-position, as shown in FIG. 7, the sensor operation order is set to 3425, 3452, 3542, or 5342, so that one sensor breaks down or all of the sensors in the group move. Even in the case of a failure, the position of the shift lever 30 is not erroneously determined as another shift position.

<Operation of Shift Position Detection Device 50>
Next, the operation of the shift position detection device 50 will be described based on the flowchart of FIG. Here, the process illustrated in FIG. 10 is repeatedly executed based on a program stored in the control unit 100.
First, when the shift position is determined (step S117), after the first timer T1 is reset (step S111), the counting of the first timer T1 is started (step S112). Next, no. 1 sensor-No. 7 sensor signals (position signals) are input to the controller 100. At this time, no. 1 sensor-No. If 7 sensors are normal or some of the sensors in the group are faulty (NO in steps S114 and S115), position determination is performed (step S117). That is, as shown in FIGS. 8 and 9, the number of inconsistencies between the detected position signal and +, H, −, D, N, and R normal position signals is obtained. Then, the shift position corresponding to the normal position signal with the smallest number of mismatches is determined as the shift position for the detected position signal.
If all the sensors in the first group are out of order (YES in step S114), if the sensors in the second group are normal, position determination is performed as described above (step S117). Conversely, even if all the sensors in the second group are faulty, if the sensors in the first group are normal (NO in step S114), position determination is performed as described above (step S117).
If all the sensors in the first group and the second group are out of order (YES in steps S114 and S115), an abnormal process is performed when the first timer T1 expires (YES in step S116) (step S116 YES). Step S118). Here, the time of the first timer T1 is set to about 0.1 seconds.
The abnormal process refers to a process of shifting the vehicle to a safe state by, for example, throttling a throttle valve, in addition to a warning lamp blinking or an alarm sound.

<Advantages of Shift Position Detection Device 50 According to the Present Embodiment>
According to the shift position detection device 50 according to the present embodiment, even when some of the sensors are abnormal or when all the sensors in one group are out of order, the detected position signal in the transition state is the shift position of the movement start point, Alternatively, the order in which the sensors change is determined so as not to approximate the normal position signal of another shift position rather than the normal position signal of the shift position of the movement destination. That is, since the detected position signal in the transition state is most approximate to the normal position signal of the shift position at the movement start point or the shift position at the movement destination, even if a part of the sensors or all the sensors in one group fail The shift lever 30 is not erroneously determined to be in another shift position.

[Embodiment 2]
Hereinafter, the shift position detection device according to the second embodiment of the present invention will be described with reference to FIGS. 11 to 13.
The shift position detection device according to the present embodiment adjusts the range of the reaction region and the non-reaction region of the sensor operation member 53 of the shift position detection device 10 according to the first embodiment, and the sensor operation when the shift lever 30 is moved. The order has been changed. Other configurations are the same as those of the shift position detection apparatus 10 according to the first embodiment.
In other words, in the shift position detection device 10 according to the first embodiment, when the shift lever 30 is moved from the H position to the D position, the reaction region and the non-reaction region of the sensor operation member 53 are set so that the sensor operation sequence becomes 1742. Is adjusted. However, as described above, the reaction region and the non-reaction region of the sensor operation member 53 may not be adjusted due to a design problem.
In this embodiment, when the shift lever 30 is moved from the H position to the D position, the reaction region and the non-reaction region of the sensor operation member 53 are adjusted so that the sensor operation order is, for example, 1724. When the sensor operation sequence is 1724, as shown in FIG. 11, when the sensors individually fail, the detected position signals of H, D, and symbols Δ1 to Δ3 are higher than the H and D normal position signals. There is no approximation to +,-, N, R normal position signals. For this reason, the position of the shift lever 30 is not erroneously determined as another shift position.
However, as shown in the column of 5-7 all zeros in FIG. 12, when all the sensors in the second group fail and the output signal is fixed at (0), the position of the shift lever 30 is different. It is misjudged as a shift position. That is, in the column of 5-7 all zeros, the number of mismatches of the + normal position signal with respect to the detected position signal of symbol Δ3 is “3”, the number of mismatches of the H regular position signal is “3”, and the number of mismatches of the regular position signal Is “5”, the number of mismatches of the D normal position signal is “3”, the number of mismatches of the N normal position signal is “5”, and the number of mismatches of the R normal position signal is “1”. That is, since the number of mismatches of the R regular position signal is “1”, which is the smallest, the R position is determined by the detected position signal of symbol Δ3. Thus, while the shift lever 30 is moving from the H position to the D position, it is erroneously determined as the R position. Therefore, in order to prevent such a problem, when the sensor operation order is 1724 or the like, abnormality processing is performed when all the sensors in one group have failed.

In FIG. 7, as described above, the sensor operation order indicated by the cross hatch is not erroneously determined that the position of the shift lever 30 is another shift position when the sensor fails individually. This represents a sensor operation sequence that may be erroneously determined when all the sensors have failed.
That is, when the shift lever 30 is moved from the H position to the D position, if the sensor operation order is 4127, 4172, 1724, or 7124, the position of the shift lever 30 is erroneously determined as another shift position if one of the sensors fails. However, there is a possibility that the position of the shift lever 30 is erroneously determined as another shift position in the case of one group failure of the sensor.
Further, when the shift lever 30 is moved from the H position to the N position, if the sensor operation order is 4675, 6457, or 6475, the position of the shift lever 30 is erroneously determined as another shift position if one sensor fails. However, there is a possibility that the position of the shift lever 30 may be erroneously determined as another shift position when one group of sensors fails.
When the shift lever 30 is moved from the N position to the R position, if the sensor operation sequence is 4127, 4172, 1724, or 7124, the position of the shift lever 30 is erroneously determined as another shift position if one of the sensors fails. However, there is a possibility that the position of the shift lever 30 may be erroneously determined as another shift position when one group of sensors fails.
When the shift lever 30 is moved from the H position to the-position, if the sensor operation sequence is 3524, 4325, 4352, or 5324, the position of the shift lever 30 is erroneously determined as another shift position if one of the sensors fails. However, there is a possibility that the position of the shift lever 30 may be erroneously determined as another shift position when one group of sensors fails.

Next, the operation of the shift position detecting device will be described based on the flowchart of FIG.
First, when the shift position is determined (step S128), after the first timer T1 is reset (step S121), the counting of the first timer T1 is started (step S122). Next, no. 1 sensor-No. 7 sensor signals (position signals) are input to the controller 100. At this time, no. 1 sensor-No. If 7 sensors are normal or some of the sensors in the group are faulty (NO in steps S114 and S115), position determination is performed (step S117). That is, as shown in FIGS. 11 and 12, the number of mismatches between the detected position signal and +, H, −, D, N, and R normal position signals is obtained. Then, the shift position corresponding to the normal position signal with the smallest number of mismatches is determined as the shift position for the detected position signal.
On the other hand, when all the sensors of the first group are faulty (YES in step S124), or when all the sensors of the second group are faulty (YES in step S127), the position of the shift lever 30 is different. Since there is a possibility that it is erroneously determined as a shift position, when the first timer T1 is up (YES in step S125), an abnormality process is performed (step S129).
As described above, when all the sensors of one group are abnormal, the abnormality processing is performed after a predetermined time from the detection of the abnormality of those sensors, so that it is erroneously determined that the shift lever is in another shift position. Safety is ensured even if possible.

<Example of change>
Here, the present invention is not limited to the above-described embodiment, and can be modified without departing from the gist of the present invention. For example, in the first and second embodiments, no. 1 to No. The shift position detection device having seven sensors 7 is illustrated, but the number of sensors can be changed as appropriate.
No. 1 to No. Although the example in which the seven sensors are divided into the first and second groups and the power supply is provided for each group is shown, the number of groups can be changed as appropriate.

It is a longitudinal cross-sectional view of a shift lever apparatus provided with the shift position detection apparatus which concerns on this Embodiment 1 of this invention. It is II-II arrow sectional drawing of FIG. It is a disassembled perspective view of a shift lever apparatus provided with the said shift position detection apparatus. It is a disassembled perspective view (A figure) and a block diagram (B figure) of the said shift position detection apparatus. It is a schematic plan view (A figure) of the gate hole of the said shift lever apparatus, and the display figure (B figure) of the normal position signal in each shift position. It is a schematic diagram (A figure, B figure) showing the positional relationship of each sensor and sensor operation member of a sensor board | substrate. It is a list showing a sensor operation order. It is a list showing a position judging method. It is a list showing a position judging method. It is a flowchart showing operation | movement of a shift position detection apparatus. It is a list showing the position determination method of the shift position detection apparatus concerning Embodiment 2 of the present invention. It is a list showing a position judging method. It is a flowchart showing operation | movement of a shift position detection apparatus.

Explanation of symbols

10. Shift lever device 30 ... Shift lever 50 ... Shift position detection device 52 ... Sensor substrate (position signal output means)
53... Sensor operation member 60... Position detection sensor (sensor)

Claims (3)

A sensor operating member and a plurality of sensors that are relatively movable in conjunction with an operation of a shift lever of the shift lever device, and the plurality of sensors according to a change in a positional relationship between the sensor operating member and the plurality of sensors. A shift position detecting device configured to detect a shift position of the shift lever based on the position signal, wherein a position signal that is a combination of output signals is changed.
A position signal output means for outputting a position signal corresponding to a positional relationship between the sensor operation member and the plurality of sensors;
In the transition state where the shift lever moves between adjacent shift positions, the position of the position signal output means is changed by changing the sensors in a predetermined order,
Even when some of the sensors fail, the position signal in the transition state is not approximated to the position signal of another shift position than the position signal of the shift position of the movement start point or the shift position of the movement destination. The shift position detecting device is characterized in that the order in which the sensors change is determined. The shift position detection device according to claim 1,
The plurality of sensors are divided into groups of several, and a power source is provided for each of the groups.
Even when all the sensors in one group fail, the position signal in the transition state does not approximate the position signal of another shift position than the position signal of the shift position of the movement start point or the shift position of the movement destination. As described above, the shift position detecting device is characterized in that the order in which the sensors change is determined. The shift position detection device according to claim 1,
The plurality of sensors are divided into groups of several, and a power source is provided for each of the groups.
When all the sensors of one group are in failure, the position signal in the transition state is closer to the position signal of another shift position than the shift signal of the movement start point or the shift position of the movement destination. The shift position detecting device, wherein in the case of a possible change order of the sensors, abnormality processing is performed after failure of all the sensors in one group is detected.

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