JP2014228012A - Vehicular shift control device - Google Patents

Abstract

When a momentary shift lever is used, a dwell time at a shift position to which the shift lever is moved is measured. When this measurement is performed in parallel between the main microcomputer and the sub-microcomputer, the measured values of both are compared at a predetermined calculation cycle. The present invention provides a shift control device that can perform abnormality detection in a timely manner while reducing the calculation load. A shift control apparatus includes a counter comparison unit and a sampling setting unit. The counter comparison unit 24B compares the residence time of the main counter 22A and the sub-counter 22B over a plurality of times until the determination time is reached. The sampling setting unit 28 sets the number of comparisons of the counter comparison unit 24B according to the shift position area to which the shift lever 12 is moved. [Selection] Figure 1

Description

  The present invention relates to a vehicle shift control device using a momentary shift lever.

  Conventionally, a momentary type shift lever has been used as a transmission means of a vehicle. The momentary type is also called an automatic return type. In this type, when the driver releases the shift lever, the shift lever automatically returns to the initial position (home position).

  The shift position selected by operating the shift lever is transmitted as an electric signal to the automatic transmission. The automatic transmission operates in accordance with the transmitted electrical signal. In such a transmission system, monitoring means is provided for monitoring whether or not the operation of the shift lever matches the operation of the automatic transmission.

  For example, in Patent Document 1, a control device that compares the shift switch selected by the driver with the actual position of the transmission is provided. In Patent Document 2, the determination time for comparing and determining the selected shift position and the actual transmission position is different for each shift position.

  Moreover, in patent document 3, the main microcomputer which performs driving | running | working control of a vehicle, and the submicrocomputer which monitors this are provided, and when both the calculation results differ, an abnormal process command is output.

JP 2004-125061 A JP 2008-512258 A Japanese Patent Laid-Open No. 11-278093

  By the way, when a momentary type shift lever is used, shift position switching control is performed based on the shift position movement and the shift lever retention time at the destination shift position. In other words, in addition to shifting the shift lever from any shift position to another shift position, the shift lever switching control is performed when the dwell time of the shift lever at the destination shift position has reached a predetermined fixed time. Is executed.

  When counting the dwell time of the shift lever is performed in parallel between the main microcomputer and the sub-microcomputer, both counts are compared as appropriate. For example, there may be a case where the comparison is performed a plurality of times from the time of shift movement to the fixed time. Here, in order to reduce the burden of arithmetic processing, it is conceivable to thin out (reduce) the number of comparisons. On the other hand, if the number of comparisons is simply thinned, the period of the comparison operation becomes long, which may lead to a delay in abnormality detection. Therefore, an object of the present invention is to provide a shift control device capable of reducing the burden of arithmetic processing while performing abnormality detection in a timely manner.

  The present invention relates to a shift control device for a vehicle. The apparatus includes a momentary shift lever that automatically returns to an initial position after operation, a detection unit that detects movement of the shift lever from the initial position to an arbitrary shift position region, and a shift position region that is a movement destination. A main counter that measures the dwell time of the shift lever until the fixed time is reached, and outputs a shift switching signal according to the shift position area of the destination when the dwell time reaches the fixed time A switching command unit that performs the comparison, a sub-counter that measures the dwell time in parallel with the main counter, and a comparison that compares the dwell time of the main counter and the sub-counter a plurality of times until the determination time is reached. A determination unit that performs an abnormality determination according to a comparison result of the comparison unit, and a shift position area of the destination, And a sampling setting unit for setting a number of comparisons of the comparison unit.

  In the above invention, the sampling setting unit may transmit the driving force when the shift position region of the movement destination is a non-traveling position region where the driving force transmission from the driving source of the vehicle to the driving wheel is cut off. It is preferable to thin out the number of comparisons of the comparison unit rather than in the travel position region.

  The vehicle shift control device according to the present invention includes a momentary shift lever that automatically returns to an initial position after operation, and a detection that detects movement of the shift lever from the initial position to an arbitrary shift position region. A main counter that measures the staying time of the shift lever in the shift position area of the moving destination until reaching the fixed time, and the shift position of the moving destination when the staying time reaches the fixed time. A switching command unit that outputs a shift switching signal corresponding to a region, a sub-counter that measures the dwell time in parallel with the main counter, and the dwell time of the main counter and the sub-counter are compared for each calculation cycle. According to the comparison unit, the determination unit that performs abnormality determination according to the comparison result of the comparison unit, and the shift position area of the destination , And a sampling setting unit that sets an operation period of the comparison unit.

  In the above invention, the sampling setting unit may transmit the driving force when the shift position region of the movement destination is a non-traveling position region where the driving force transmission from the driving source of the vehicle to the driving wheel is cut off. It is preferable to make the calculation period of the comparison unit longer than that in the travel position region.

  According to the present invention, it is possible to reduce the burden of calculation processing for detecting an abnormality while performing abnormality detection of the main microcomputer in a timely manner.

It is a figure which illustrates the shift control apparatus which concerns on this embodiment. It is a figure explaining allocation of a shift position area. It is a figure explaining the determination method of a shift position. It is a figure explaining the determination method of a shift position. It is a figure explaining operation | movement of a main counter and a subcounter.

  FIG. 1 illustrates a shift control apparatus 10 according to this embodiment. The shift control device 10 is mounted as shift control means for a vehicle (not shown). The shift control device 10 includes a shift lever 12, a guide slot 14, a shift position sensor 16, a parking switch 18, a main detection unit 20A, a sub detection unit 20B, a main counter 22A, a sub counter 22B, a detection unit comparison unit 24A, and a counter use. A comparison unit 24B, a determination unit 26, a sampling setting unit 28, and a switching command unit 30 are provided. Each unit from the main detection unit 20A to the switching command unit 30 may be configured by a microcomputer having a CPU, a RAM, a ROM, and the like. In this case, the microcomputer performs signal processing according to a program stored in advance, so that the function of each unit can be executed.

  The shift lever 12 is composed of a momentary shift lever. That is, after the operation, when the driver releases his hand from the shift lever 12, the shift lever 12 automatically returns to the initial position (M position) by a biasing means such as a spring (not shown).

  The guide slot 14 is also referred to as a gate, and is a guide member that determines the movement range of the shift lever 12. A shift position area corresponding to each of a plurality of shift positions is assigned to the movement range. For example, as shown in FIG. 2, the guide slot 14 has a shape in which the lower case letter h is inverted, and each end region includes a B position (so-called engine brake position) region and an R position (reverse). An area and a D position (forward) area are allocated. In addition, an intermediate region connecting the respective end portions is divided into two, and an M position (initial position) region is assigned to one and an N position (neutral) region is assigned to the other.

  Returning to FIG. 1, the shift position sensor 16 outputs a position signal corresponding to the position of the shift lever 12 on the guide slot 14. The shift position sensor 16 includes, for example, a hall element, and outputs a voltage value corresponding to the position of the shift lever 12. The shift position sensor 16 may be composed of, for example, a vertical sensor that detects the movement of the shift lever 12 in the vertical direction of the paper and a horizontal sensor that detects the movement of the horizontal direction of the paper.

  The parking switch 18 is a P (parking) position switching means. The parking switch 18 outputs a signal corresponding to the on / off state. Further, the signal processing control of both is performed so that the signal output from the parking switch 18 has priority over the signal output from the shift position sensor 16. For example, when the parking switch 18 is turned on, control of the automatic transmission according to the P position is executed regardless of the shift position of the shift lever 12.

  The main detection unit 20 </ b> A is a detection unit that detects a change in the shift position due to the operation of the shift lever 12. A position signal corresponding to the position of the shift lever 12 is transmitted from the shift position sensor 16 to the main detection unit 20A. Based on this position signal, the main detection unit 20A detects in which shift position area the shift lever 12 is located.

  Further, the main detection unit 20A detects the movement of the shift lever 12 from the initial position (M position) to an arbitrary shift position region. When detecting the movement of the shift lever 12 from an arbitrary shift position area to another shift position area, the main detection unit 20A transmits a position movement signal indicating movement of the shift position to the main counter 22A.

  For example, in FIG. 3, when performing the shift switching from the M position to the N position, the main detection unit 20A detects the position movement signal as the main movement signal when the movement of the shift lever 12 from the M position area to the N position area is detected. Transmit to the counter 22A. Further, when performing shift switching from the M position to the D position, the shift lever 12 is operated to the D position area from the M position area to the N position area. At this time, the main detection unit 20A transmits a position movement signal to the main counter 22A twice at the time of movement from the M position area to the N position area and the time of movement from the N position area to the D position area. To do.

  Further, a signal indicating the on / off state of the switch is transmitted from the parking switch 18 to the main detection unit 20A. Even when the on / off signal of the parking switch 18 is received, the main detection unit 20A transmits a position movement signal to the main counter 22A.

  Returning to FIG. 1, the sub detection unit 20B is a detection unit for monitoring the operation of the main detection unit 20A. The sub detection unit 20B performs the same determination process as the main detection unit 20A. That is, a position signal is transmitted from the shift position sensor 16 to the sub detection unit 20B in parallel (that is, simultaneously) with the main detection unit 20A. An on / off signal is transmitted from the parking switch 18. Based on these signals, the sub detection unit 20B detects the shift position region where the shift lever 12 is located and the on / off state of the P position.

  Similarly to the main detection unit 20A, when the movement of the shift lever 12 from the M position to another shift position region is detected, or when the on / off signal of the parking switch 18 is received, the sub detection unit 20B Transmits a position movement signal to the sub-counter 22B.

  The detection unit comparison unit 24A is a comparison unit that compares detection results of the main detection unit 20A and the sub detection unit 20B. The detection unit comparison unit 24A receives the shift position values detected by the main detection unit 20A and the sub detection unit 20B. 24 A of detection part comparison parts transmit the shift position comparison signal which compared each shift position to the determination part 26. FIG.

  The main counter 22A performs time measurement until the residence time in the shift position area to which the shift lever 12 is moved reaches a fixed time. The main counter 22A is composed of, for example, a timer circuit.

When the main counter 22A receives the position movement signal from the main detection unit 20A, the main counter 22A starts measuring the residence time. For example, as shown in FIG. 3, when the shift lever 12 moves from the M position area to the N position area and receives a position movement signal generated thereby, the main counter 22A measures the residence time from the reception time point. To start. When the residence time reaches a predetermined fixed time _Tf , the main counter 22A transmits an arrival signal indicating the arrival of the fixed time to the switching command unit 30.

As shown in FIG. 4, when the shift lever 12 is operated from the M position to the D position area via the N position area, the dwell time count is reset halfway. That is, when the shift lever 12 moves from the M position area to the N position area, the main counter 22A receives the position movement signal. In response to this, the main counter 22A starts counting the residence time. Further, when the shift lever 12 moves from the N position area to the D position area before the dwell time reaches the fixed time T _f , the main counter 22A receives the position movement signal again. At this time, the dwell time that has been counted so far is reset (becomes 0), and dwell time counting is started again.

  Further, when the main detection unit 20A receives the ON signal of the parking switch 18, a position movement signal is transmitted to the main counter 22A. Also in this case, the main counter 22A measures the residence time.

Returning to FIG. 1, when the dwell time reaches the fixed time T _f , the switching command unit 30 outputs a shift switching signal corresponding to the shift position area to which the shift lever 12 is moved. The switching command unit 30 receives a detection signal of the shift position area to which the shift lever 12 is moved from the main detection unit 20A. Furthermore, the switching command unit 30 receives an arrival signal indicating the arrival of the fixed time from the main counter 22A. At this time, the switching command unit 30 transmits a shift switching signal to an electronic control unit (ECU) that performs vehicle control (not shown). The shift switching signal may indicate the value of the shift position corresponding to the shift position area where the shift lever 12 has stayed until the fixed time.

  The sub-counter 22B is a measuring unit for monitoring the operation of the main counter 22A. When receiving the position movement signal from the sub detection unit 20B, the sub counter 22B measures the dwell time of the shift lever 12 in parallel (simultaneously) with the main counter 22A. The sub-counter 22B is composed of a timer circuit that is separate from the main counter 22A, for example.

In the sub-counter 22B, when the shift lever 12 moves to another shift position area before the residence time reaches the fixed time, the residence time count is reset and the residence time is counted again in the same manner as the main counter 22A. Is started. Further, since the sub-counter 22B is provided for monitoring the operation of the main counter 22A, unlike the main counter 22A, no arrival signal is output even when the residence time reaches the fixed time _Tf. You may do it.

The counter comparison unit 24B is a comparison unit that compares the residence times measured by the main counter 22A and the sub-counter 22B. The counter comparison unit 24B compares the residence time of the main counter 22A and the sub-counter 22B over a plurality of times until the determination time _Tf is reached. For example, the counter comparison unit 24 </ b> B calculates a difference value between the respective residence times and transmits the difference value to the determination unit 26.

FIG. 5 shows an example of comparison processing. The counter comparison unit 24B compares the measurement value T _c1 of the residence time of the main counter 22A with the measurement value T _c2 of the residence time of the sub-counter 22B for each calculation cycle T _s set by the sampling setting unit 28. . Specifically, as shown in Figure 5, the counter comparison portion 24B is the measured value T _c11 of the main counter 22A, obtains a difference value between the measured value T _c21 subcounters 22B. Further, after the calculation cycle T _s , a difference value between the measurement value T _c12 of the main counter 22A and the measurement value T _c22 of the sub counter 22B is _obtained .

  The determination unit 26 is a determination unit that performs abnormality determination according to the comparison results of the detection unit comparison unit 24A and the counter comparison unit 24B. When a signal indicating that the shift positions detected by the main detection unit 20A and the sub detection unit 20B are different is received from the detection unit comparison unit 24A, the determination unit 26 performs abnormality determination and performs an abnormality process on the electronic control unit. Send a signal. Further, as will be described later, when the determination unit 26 receives a signal indicating that the measured values of the main counter 22A and the sub-counter 22B are different from the counter comparison unit 24B, the abnormality processing signal is sent to the electronic control unit. Send.

  Note that the case where the measured values of the main counter 22A and the sub-counter 22B are different is not limited to the case where the difference value between them is a non-zero value. For example, margin values based on individual differences between the main counter 22A, the sub-counter 22B, and their peripheral devices are set in advance. In addition, when the difference value between the measurement values of the main counter 22A and the sub-counter 22B deviates from the margin value, the determination unit 26 may make an abnormality determination.

In addition, the comparison process is performed a plurality of times until the fixed time T _f is reached. Therefore, the determination unit 26, when the measurement values of the main counter 22A and the sub-counter 22B are the same over all the comparison processes (when all the difference values are within the margin value). May be determined to be normal. Further, in any one of the comparison processes, the determination unit 26 may perform abnormality determination when the measurement values of the two are different.

  Further, the abnormality processing signal may be given priority over the shift switching signal by the switching command unit 30. For example, when receiving the abnormality processing signal, the electronic control unit may execute the abnormality processing regardless of the shift switching signal.

  Returning to FIG. 1, the sampling setting unit 28 is a setting means for setting the number of comparisons of the counter comparison unit 24B. The sampling setting unit 28 sets the number of comparisons according to the shift position area to which the shift lever 12 is moved.

  The sampling setting unit 28 is transmitted from the main detection unit 20A with the shift position region to which the shift lever 12 is moved or the value of the shift position corresponding to the region. Further, when the parking switch 18 is in an ON state, a P position detection signal is transmitted from the main detection unit 20A. The sampling setting unit 28 sets the number of comparisons according to these signals.

  For example, when the shift position region to which the shift lever 12 is moved is a non-traveling position region, the sampling setting unit 28 sets the number of comparisons so that the number of comparisons is thinned out compared with the traveling position region.

  The non-traveling position refers to a shift position where transmission of driving force from the driving source of the vehicle to the driving wheel is cut off, for example, an N position. Therefore, the non-traveling position area refers to the N position area. The traveling position refers to a shift position where driving force is transmitted from the driving source of the vehicle to the driving wheels, and refers to, for example, a B position, an R position, and a D position. Therefore, the travel position area refers to the B position area, the R position area, and the D position area.

  Further, in the P position, since the driving force transmission from the driving source of the vehicle to the driving wheels is cut off, the position corresponds to a non-traveling position. Therefore, even when the detection signal for the P position is received from the main detection unit 20A, the sampling setting unit 28 may thin out the number of comparisons as compared with the traveling position.

  In the non-traveling position, since the driving force transmission to the driving wheels is cut off, it is considered that the necessity of making the urgent degree of abnormality detection equal to the traveling position is low. Therefore, in the present embodiment, the number of comparisons at the non-traveling position is set to be smaller than the number of comparisons at the traveling position. By doing in this way, it becomes possible to reduce the load of calculation processing while performing abnormality detection in a timely manner.

For example, the number of comparisons is set as follows. The sampling setting unit 28 is transmitted from the main detection unit 20A with the shift position region to which the shift lever 12 is moved or the value of the shift position corresponding to the region. Further, when the parking switch 18 is in an ON state, a P position detection signal is transmitted from the main detection unit 20A. In accordance with these signals, the sampling setting unit 28 sets a calculation cycle T _s in which the counter comparison unit 24B performs comparison processing.

The calculation cycle T _s is set according to, for example, a CPU clock pulse. Further, the calculation cycle T _s is less than the fixed time T _f and is set, for example, in a range of T _s <T _f / 2. The sampling setting unit 28 sets the calculation cycle T _s longer when the shift position region to which the shift lever 12 is moved is a non-traveling position region than when the shift lever region is in the traveling position region. By doing so, the number of comparisons in the non-traveling position area is thinned out compared with the number of comparisons in the traveling position area.

  Next, shift control by the shift control device 10 according to the present embodiment will be described. When the driver operates the shift lever 12, a position signal is transmitted from the shift position sensor 16 to the main detection unit 20A and the sub detection unit 20B according to the position of the shift lever 12. The main detection unit 20A and the sub detection unit 20B detect the current shift position according to the position signal.

  Further, when the parking switch 18 is pushed (turned on) by the driver, an on signal is transmitted to the main detection unit 20A and the sub detection unit 20B. In accordance with this signal, the main detection unit 20A and the sub detection unit 20B detect that the current shift position is the P position.

  The shift position detected by the main detection unit 20 </ b> A is transmitted to the switching command unit 30. The shift positions detected by the main detection unit 20A and the sub detection unit 20B are compared by the detection unit comparison unit 24A. The comparison result is transmitted to the determination unit 26.

  Further, the main detection unit 20A detects that the shift lever 12 has moved from an arbitrary shift position region to another shift position region or receives an ON signal from the parking switch 18, and then receives the main counter 22A. Send a position movement signal to. In response to this, the main counter 22A starts measuring the residence time.

When the residence time measured by the main counter 22A reaches the fixed time T _f , the main counter 22A transmits an arrival signal to the switching command unit 30. The switching command unit 30 transmits a shift switching signal to the electronic control unit. The electronic control unit controls the automatic transmission based on the shift switching signal.

In addition, when receiving the position movement signal from the sub detection unit 20B, the sub counter 22B starts measuring the residence time. The counter comparison unit 24B compares the residence times measured by the main counter 22A and the sub-counter 22B. In this comparison, the sampling setting unit 28 sets the number of comparisons of the measurement values of the main counter 22A and the sub counter 22B. That is, the sampling setting unit 28 obtains information on the (current) shift position to which the shift lever 12 is moved from the main detection unit 20A, and sets the calculation cycle T _s based on this. The comparison result in the counter comparison unit 24B is transmitted to the determination unit 26.

  When the shift position detected by the main detection unit 20A and the sub detection unit 20B is different from the comparison result of the detection unit comparison unit 24A, or when the comparison result of the counter comparison unit 24B is received, When the residence time of the counter 22B is different, the determination unit 26 transmits an abnormality processing signal. The electronic control unit receives the abnormality processing signal and executes abnormality processing such as a system down of the vehicle.

  In the above-described embodiment, the shift lever 12 is slidably moved on the guide slot 14. However, the present invention is not limited to this. That is, the shift lever 12 may be of a momentary type, and may be a multi-axis operation type (so-called joystick type) shift lever, for example. In this case, a plurality of shift position areas are allocated to the operable area of the shift lever 12 (for example, the front-rear and left-right directions). The main counter 22A and the sub-counter 22B measure the dwell time of the shift lever 12 in the shift position area of the shift destination of the shift lever 12 (that is, the position where the lever is tilted) until the fixed time is reached.

  10 shift control device, 12 shift lever, 14 guide slot, 16 shift position sensor, 18 parking switch, 20A main detection unit, 20B sub detection unit, 22A main counter, 22B sub counter, 24A detection unit comparison unit, 24B for counter Comparison unit, 26 determination unit, 28 sampling setting unit, 30 switching command unit.

Claims (4)

Momentary shift lever that automatically returns to the initial position after operation,
A detection unit for detecting movement of the shift lever from the initial position to an arbitrary shift position region;
A main counter that measures the dwell time of the shift lever in the shift position area of the movement destination until the fixed time is reached;
A switching command unit that outputs a shift switching signal according to the shift position area of the destination when the residence time reaches the fixed time;
In parallel with the main counter, a sub-counter that measures the residence time;
A comparison unit that compares the residence time of the main counter and the sub-counter a plurality of times until reaching the fixed time;
A determination unit that performs abnormality determination according to the comparison result of the comparison unit;
A sampling setting unit that sets the number of comparisons of the comparison unit according to the shift position area of the destination,
A shift control apparatus for a vehicle, comprising: The shift control device for a vehicle according to claim 1,
The sampling setting unit is a travel position region in which the driving force transmission is performed when the shift position region of the movement destination is a non-traveling position region in which the driving force transmission from the driving source of the vehicle to the driving wheel is cut off. The shift control device for a vehicle is characterized in that the number of comparisons of the comparison unit is thinned out more than the time. Momentary shift lever that automatically returns to the initial position after operation,
A detection unit for detecting movement of the shift lever from the initial position to an arbitrary shift position region;
A main counter that measures the dwell time of the shift lever in the shift position area of the movement destination until the fixed time is reached;
A switching command unit that outputs a shift switching signal according to the shift position area of the destination when the residence time reaches the fixed time;
In parallel with the main counter, a sub-counter that measures the residence time;
A comparison unit that compares the residence time of the main counter and the sub-counter for each calculation cycle;
A determination unit that performs abnormality determination according to the comparison result of the comparison unit;
A sampling setting unit for setting a calculation cycle of the comparison unit according to the shift position area of the destination;
A shift control apparatus for a vehicle, comprising: The vehicle shift control device according to claim 3,
The sampling setting unit is a travel position region in which the driving force transmission is performed when the shift position region of the movement destination is a non-traveling position region in which the driving force transmission from the driving source of the vehicle to the driving wheel is cut off. The shift control device for a vehicle is characterized in that the calculation cycle of the comparison unit is made longer than the time.

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