JPS6154456A - Correcting device for abnormal value of speed or the like of automobile or the like - Google Patents

Abstract

PURPOSE:To correct an abnormal value and prevetn a time lag and a decrease in acceleration during starting by substituting the abnormal pulse value of an automobile speed, rotating speed of a driving source, etc., with the number of pulses obtained by adding or subtracting the number of pulses which are counted previously. CONSTITUTION:The device consists of a sensor 5 which outputs pulses corresponding to the rotating speed of a drive transmission device, a counter 7, a comparing means which calculates the difference in the number of pulses, a judging means which judges an abnormal value, an adding and subtracting means which adds or subtracts a maximum variation range, and a control signal output means. The control means compares the number P2 of pulses which are counted at constant intervals of time with the number P1 of pulses which are counted previously. The when the difference ¦Pc¦ between the both is larger than the maximum variation range DELTAP of the preset number of pulses which may be generated during a steady run, the number P2 of pulses is judged as an abnormal value and the maximum variation range DELTAP is added to or subtracted from the number P1 of pulses which are counted previously. Then, the number P2 of pulses is substituted with the calculated number P3 of pulses and various control signals such as a speed display signal corresponding to the number P3 of pulses are outputted.

Description

[Detailed Description of the Invention] Purpose of the Invention (Industrial Field of Application) This invention is an object of the present invention when detecting vehicle speed, rotational speed of a driving source, etc. in an automobile, etc., when the detected signal is abnormal due to some reason. The present invention relates to an abnormal value correction device that corrects an abnormal value when the abnormal value becomes a value.

(Prior art) - A speed detection unit installed in a vehicle such as an automobile and detecting the vehicle speed has a pickup sensor arranged opposite to a gear of a power transmission device, such as a differential gear device, linked to a drive source such as an engine, and A pickup sensor detects the rotational speed of the gear, and outputs the rotational speed as a pulse signal to a counter. Then, the counter counts the number of pulses of a pulse signal input within a predetermined period of time, and the control device determines the vehicle speed according to the counted pulses. It is displayed on the meter.

In addition, conventionally, when a counter counts the pulses within a certain period of time, the number of pulses counted earlier and the number of pulses counted at that time are compared and stored in the memory of the control device in advance. If the maximum change range ΔP is exceeded, the control device determines that the 1181 detected pulse number is an abnormal value, and does not take in the pulse number at that time.

On the other hand, if the pulse number at that time exceeds the maximum change range that can actually occur in comparison with the previous pulse number, the control device determines that the number of pulses detected at that time is an abnormal value. However, the number of pulses at that time was captured and the speed corresponding to this number of pulses was displayed on the speedometer (see Figure 4).

(Problem to be Solved by the Invention) However, in the conventional configuration as described above, if the control device treats the current pulse number as an abnormal value and does not take in the number of pulses several times in a row, the control will fail. There is a possibility that the 11 device may stop capturing the pulse number forever, and in that case, the speedometer will not display the vehicle speed.

For example, when a car suddenly starts and the drive wheels slip, the number of pulses detected is small at the beginning of acceleration, but when the drive wheels slip, the number of pulses detected becomes very large and is stored in the memory of the control device. The control device determines that the number of pulses detected in the slip state is an abnormal value when the number of pulses exceeds the maximum change range ΔP that can actually occur.

Then, the slip condition of the drive wheels is resolved and automatic illumination]1
When the vehicle actually starts moving, the number of pulses in the slip state is compared with the number of pulses in the state in which the drive wheels are actually being driven, but since the actual vehicle speed is slow, the control device The control device determines that the number of pulses detected at that time exceeds the maximum change range ΔP that can actually occur stored in the memory of , and is an abnormal value. After that, there is a possibility that the control device will no longer receive the detected number of pulses forever.

In addition, in a vehicle equipped with a multi-speed transmission and a speed detection unit that detects the speed based on the rotational speed of the gears of the power transmission device as described above, the control device operates according to the vehicle speed detected by the speed detection unit. A system has been proposed in which an appropriate shift position for the transmission is determined, and the control device issues a shift 1 to shift command to a shift operating device of the transmission.

However, as mentioned above, if the drive wheels slip during a sudden start, the control device determines that the vehicle is traveling at high speed based on the pulses output from the speed detector, even though the vehicle is not actually traveling at high speed. However, an erroneous high-speed shift change command will be issued to the shift operating device. Furthermore, when the drive wheel slip is resolved and the vehicle is running steadily,
The control device determines that the speed is low based on the pulse output from the speed detection section, and then shifts the shift operation to 1'IE I'A.
A downshift change command was issued to the IV, which caused shift hunting, which caused a time lag when starting and reduced acceleration.

Structure of the Invention (Means for Solving Problems) The abnormal value correction device for vehicle speed, etc. of the present invention detects the rotational speed of the drive transmission device that transmits the driving force from the drive source to the drive wheels, and A sensor that outputs pulses corresponding to the number of pulses, a counter that counts the pulses output from the sensor at regular intervals, and a difference of 1 Pcl between the number of pulses P2 counted by the counter at that time and the previously counted pulse vlp i. a first comparison means for determining the difference lPc;
1. A second comparison means for determining the difference between the maximum change range ΔP of the number of pulses that can occur during steady running and a preset value ΔP; When the difference IPcI of P2 is smaller than the preset maximum change range ΔP of the number of pulses that can occur during steady running, the number of pulses P2 counted at that time is determined to be a normal value; When the pulse number P2 is larger than the maximum change range ΔP, the pulse number P2 at that time is determined to be an abnormal field, and when the determination means determines that the pulse number P2 at that time is a normal value, the pulse number P2 is determined to be abnormal. a first control signal output means for outputting various control signals such as a speed display signal corresponding to Equation 22;
11 The determining means determines that the pulse number P2 at that time is an abnormal 1st shift, and when 1c is reached, the previously counted pulse number P
1, when pc>Q, the maximum change range ΔP is added, and when Pc<0, the iil, i maximum change range ΔP is subtracted, and the number of pulses obtained by the adjustment is 2.
3 is replaced with the number of pulses P2 counted at that time and corresponds to the same number of pulses P3. The gist is what was done.

(Operation) With the above configuration, the control means compares the number of pulses P2 counted by the force r Kunta at that time with the number of pulses P1 counted previously, and calculates the notlPcl of both. If the difference lPc1 is smaller than the preset maximum change range ΔP of the number of pulses that can occur during steady running, the number of pulses P2 at that time is determined to be a normal value, and the speed corresponding to the number of pulses P2 is determined. Outputs various control signals for the display signal shade.

On the other hand, if the difference between the two lPc1 is larger than the preset maximum change range △P of the number of pulses that can occur during steady running, the number of pulses P2 at that time is determined to be an abnormal value and the number of pulses P1 counted earlier is used. The maximum change range ΔP is added or subtracted, and the calculated number of pulses P3 is set to 7 at that time.
It replaces the counted pulse number P2 and outputs various control signals such as a speed display signal corresponding to the same pulse number P3.

As a result, unlike the above-mentioned conventional technology, it is possible to prevent the vehicle speed from being displayed in the speed a1, and to prevent shift hunting from occurring in vehicles with a multi-speed transmission, resulting in a time lag at the time of starting and a reduction in acceleration performance. It turns out.

(Embodiment) Hereinafter, an embodiment in which the present invention is embodied in a vehicle with a multi-speed transmission will be described with reference to FIGS. 1 to 3.

In FIG. 1, an engine 1 as a driving source has a multi-speed transmission transmission 2. A drive wheel 4 is linked via a drive transmission side such as a differential gear support 3. A gear 2a provided on the output side rotation shaft of the multi-speed transmission mission 2 includes a vehicle speed sensor 5.
are arranged facing each other, and a vehicle speed sensor 5 detects the rotation speed of the gear 2a.
The detection LP is designed to output a pulse.

The electrical circuit installed in the vehicle constructed as described above will be explained with reference to FIG.

The vehicle speed sensor 5 is connected to the first. It is connected to a central processing unit 8 (hereinafter referred to as CPU) as a control means that includes a second comparison means, a judgment means, first and second control signal output means, and an adjustment means. The counter 7 is configured to count the pulses that have been modified into a desired waveform by the waveform shaping circuit 6 and output.

The timer 9 is connected to the counter 7 and the CPU 8, and when it outputs a reset signal to the counter 7 at regular intervals, it sets the number of pulses counted in the CP 1-J8 to the same port/tube. It is designed to output words. When the counter 7 inputs the reset signal of the timer 9, it enters a reset state,
The pulses output from the vehicle speed sensor 5 via the waveform shaping circuit 6 are counted again.

Note that the vehicle speed sensor 5. Waveform shaping circuit 6 and timer 9
A speed detection section is constructed by the above.

The CPU 8 sequentially inputs the number of pulses counted by the counter 7, and sets the number of pulses counted when the set signal of the timer 9 is input to the pulse I&P 2 counted at that time. . or,
When the number of pulses P2 is set in the CPU 8 by the hit signal, the CPU 8
is the number of pulses P counted earlier and stored in the memory 13
1 from the memory 13, both pulse numbers Pi, P
2's IPcl (=IP2-P11) is excluded.

Next, if the difference between the two IPcI is equal to or smaller than the maximum change range ΔP of the number of pulses that can occur during steady running, which is stored in advance in the memory 13 (in other words, 1Pc
l≦ΔP), the pulse number P2 at that time is determined to be a normal value, and a speed display signal as a control signal corresponding to the pulse number P2 is output to the speedometer 10 described later. In this embodiment, a speed display signal is output based on the calculation formula: ■=KXP2. Note that ■ is the speed and 1 or a proportionality constant related to the speed.

Furthermore, at this time, the CPU determines the shift position corresponding to the qth pulse EtP2 based on the shift map stored in advance in the memory device 13, and similarly sends a shift change signal as a control signal via the interface 11. and outputs the pulse number P2 to the shift operation device 12.
1) Store in memories 1 and 3.

On the contrary, the CPU 8 uses both P1. If the difference jPc1 of P2 is larger than the pre-stored maximum change range ΔP of the number of pulses that can occur during steady running (i.e., IPcI>
ΔP) judges the pulse number P2 at that time to be an abnormal value, reads out the previously counted pulse F, 'l(P1) from the memory 13, and changes the maximum change range when pc>Q for the same pulse?lp1. Add ΔP, and conversely, in the case of pcguO, 1) subtract the maximum change range ΔP in a. At that time, the number of pulses P2 from 1 to 1 is ignored as an abnormal signal 7, and the number of pulses P3 (=
P1+ΔP) is replaced with the number of pulses P2 counted at that time.

Then, the CPU 8 outputs a speed display signal as a control signal corresponding to the number of pulses P3 to the speedometer 10.

In this embodiment, a speed display signal is output based on the arithmetic expression v=KxP3.

Roughly speaking, the CPU determines the shift position corresponding to the number of pulses P3 based on the shift map stored in advance in the memory 13, and similarly sends a shift change signal as a control signal to the shift operating device 12 via the interface 11. In addition to outputting, the pulses counted at that time @P2
Instead of , the number of pulses P is the number of pulses counted at that time.
3 is stored in the memory 13.

Note that the number of pulses P2. When P3 is stored in the memory 13, the previously counted number of pulses stored in the memory 13 is cleared.

A speedometer 10 is connected to the CPU 8, and a shift operation device 12 is also connected via an interface 11. The speedometer 10 displays the speed when receiving the speed display signal output from the CPU 8. Further, when the shift operation signal outputted from the CPU 8 is inputted via the interface 11, the shift operation device 12 selectively shifts up or down the multi-speed transmission mission 2 based on the shift operation signal. It's becoming a sea urchin.

The maximum change range ΔP (>O) in the number of pulses that can occur during steady running is the number of pulses P counted in the light.
1, the multi-speed transmission mission 2 is set to I mode, which does not cause shift hunting, by a shift operation signal outputted from the CPU 8 corresponding to the number of pulses P3 produced as a result of IS.

Now, when the vehicle configured as described above accelerates or decelerates so as to run steadily, the engine 1 drives the multi-speed transmission mission 2. The drive wheels 4 are driven and rotated through a drive transmission mechanism such as a differential gear (3 wheels), and at this time the vehicle speed sensor 5
detects the rotational speed of the gear 2a of the multi-speed mission 2 and outputs a pulse to the waveform shaping circuit 6.

The counter 7 counts the pulses that have been modified into a desired waveform by the waveform shaping circuit 6 and output from the same waveform shaping circuit 6. Then, when the counter (79) outputs a reset signal to the counter 7 at regular intervals, the counter 7 is put into a reset state by the reset signal, and the signal is again output from the vehicle speed sensor 5 via the waveform shaping circuit 6. Count pulses.

+XJ The CPU 8 sequentially inputs the number of pulses counted by the counter 7, and sets the number of pulses counted when the set signal is input from the timer 9 at regular intervals as the number of pulses counted at that time P2.

Then, when the pulses G and QP2 counted at that time are set in CPJ8 by a set signal, the CPU 8 reads out the number of pulses P1 stored in the memory 13 as the number of pulses P2 at that time last time from the memory 13, and Pulse &, kP1. P2 difference IPc l (=IP
2-P II) is calculated.

Next, CPtJ8 is the difference between the two lPc1=lP2-P1
1 is equal to or smaller than the maximum change range ΔP of the number of pulses that can occur during normal running, which is stored in advance in the memory 13 (i.e., IPO1≦ΔP), the number of pulses P2 at that time is set to normal 1. It is determined that v=KXP
2 performance ceremony (Koizu (1) to transmit the speed display signal to the speedometer 1
Output to 0. Furthermore, at this time, the CPU is memory 13
The shift position corresponding to the number of pulses P24 is determined based on the shift map prepared in advance in advance, and a shift change signal as a control signal is also output to the shift operating device 12 via the interface 11. The counted pulse number P1 stored in the memory 13 is cleared, and the /< pulse number P2 is stored in the memory 13.

The speedometer 10 displays the speed based on a 4N1 speed display signal output from the CPU 8, and the shift operation device 12 receives a 4N1 shift operation signal output from the CPU via the interface 11. Then, based on the shift operation signal (1!ff ii), the multi-speed transmission mission 2 is selectively shifted up or down.

Similarly, when the CPU 8 determines that the pulse number P2 at that time is a normal value, it outputs a speed display signal to the speedometer 10 based on the equation v=KxP2, and also outputs a shift change signal to the speedometer 10. Output to the shift operation device 12 via the interface 11 Next, if the drive wheels 4 slip during acceleration, such as during a sudden start, the number of detected pulses is small at the beginning of acceleration, but it is detected that the drive wheels 4 slip. The number of pulses becomes very large.

In such a case, the difference between the number of pulses P1 counted earlier and the number of pulses P2 counted at that time, IPc 1=IP
2-P if is larger than the maximum change range ΔP of the number of pulses that can occur during steady running, which is stored in advance in the memory 13 (that is, lPc1>ΔP), and C
PLI8 determines that the pulse number P2 at that time is an abnormal value.

Then, the CPU ignores the pulse number P2 counted at that time as an abnormal signal, reads out the previously counted pulse number P1 from the memory 13, and then outputs the pulse number P2 counted at that time as an abnormal signal.
〉0, so add the maximum change range ΔP to the same pulse failure P1, add the same failure, and get the IR pulse number P 3
(=P 1+ΔP) is the number of pulses P counted at that time
Replace with 2.

Then, the CPU 8 outputs a speed display signal to the speedometer 1o based on the arithmetic expression V=KXP3.

Further, the CPU determines a shift position corresponding to the number of pulses P3 based on a shift map stored in advance in the memory 13, and sends a shift change signal to the interface 11.
The previously counted pulses 3. and 3. are output to the shift operating device 12 via the pulse 3.
Clear Qpl and use pulse &P as the number of pulses counted at that time instead of the number of pulses counted at that time P2.
3 is +'+ff memory co-memory 13.

The speedometer 10 displays the speed based on the speed display signal output from the CPL 18, and the shift operation device 12 receives the shift operation signal output from the CPU via the interface 11. Then, the multi-speed transmission transmission 2 is shifted up based on the shift 1 operation signal.

Similarly, if the CPU 8 determines that the pulse number P2 at that time is an abnormal value, it outputs a speed display signal to the speedometer 10 based on the equation V=KXP3, and also outputs a shift change signal to the speedometer 10. It is output to the shift operation device 12 via the interface 11.

Next, during deceleration, the number of pulses counted earlier P 1
The difference between and the number of pulses P2 counted at that time is 1pc +
(=IP 2 - P 11) is larger than the maximum change range ΔP of the number of pulses that can occur during normal running, which is stored in advance in the memory 13 (lPcl>ΔP), the CPU 8 changes the number of pulses P2 at that time to However, since pc<Q, the CPU 8 subtracts the maximum change range ΔP from the previously counted pulse iP1, and uses the resulting number of pulses P3 as the number of pulses counted at that time. Replace with P2.

Then, the CPU outputs one word of 'a degree display to the speedometer 10 as in the case of acceleration, based on the calculation formula V=KXP 3.
and output the shift change signal to interface 1.
1 to the Schiff I'-I'I'' device 12.

Also, at this time, the CPIJ8 calculates 1) the number of pulses P stored in the memory 13 as in the case of a2 acceleration;
1 is cleared, and instead of the shifted pulse number P2, the pulse number P2 set in the previous time, that is, P3, is stored as it is in the memory 13 as it is the pulseless counted at that time.

The speedometer 10 displays the speed based on the speed display signal output from the CPU, and the shift operation device 12 receives the shift operation signal output from the CPU via the interface 11. , and shifts the multi-speed transmission mission 2 based on the shift operation signal.

In this way, even when an abnormal pulse number is detected due to a slip or the like, an appropriate speed is displayed on the speedometer 1Q'.

Further, as described above, the control means adjusts the appropriate shift 1 to all positions of the multi-speed transmission mission 2 according to the vehicle speed detected by the speed detection section, and issues a shift change command from the control means to the shift operation device of the transmission mission. In the case of a vehicle that is designed to output a shift change signal, even if the drive wheels 4 slip, an appropriate shift change signal is output to the shift operation device 12, so unlike conventional vehicles, it may cause shift hunting, a time lag when starting, or , acceleration performance will not deteriorate.

Note that the present invention is not limited to the above-mentioned embodiments, and for example, as shown in FIG. However, for the rotation speed sensor 14, a waveform shaping circuit, a counter, and a timer for the rotation speed sensor 14 are connected to the CPU 8 in the same manner as the vehicle speed sensor 5, and
A tachometer may be connected to U8, and the CPLI 8 may output a rotation speed display signal to the tachometer in response to the number of pulses output from the counter.

By doing so, as in the case of detecting the vehicle speed, there is no possibility that the rotational speed will not be displayed on the tachometer when an abnormal value is detected.

Effects of the Invention As detailed above, this invention eliminates the risk of the speedometer not displaying the vehicle speed or the tachometer not displaying the rotational speed, and in vehicles with multi-speed transmissions, shift hunting occurs. Since it prevents time lag at the time of starting and deterioration of acceleration performance, reliability is improved even if the number of detected pulses becomes an abnormal value, and the driving feeling is improved, making it an excellent invention for industrial use. .

[Brief explanation of drawings]

FIG. 1 is a schematic diagram of a vehicle according to an embodiment of the present invention, FIG. 2 is an electric circuit diagram of the abnormal value correction device, FIG. 3 is a flowchart, and FIG. 4 is a flowchart of a conventional example. Engine 1, multi-speed transmission transmission 2, gear 2a, differential gear mechanism 3, drive wheels 4, vehicle speed sensor 5, waveform shaping circuit 6,
Counter 7, CPU 8, speedometer 10, shift operation device 1
2. Pulse viP1, P2, maximum change range of pulse number △
P0

Claims (1)

[Scope of Claims] A sensor that detects the rotational speed of a drive transmission device that transmits driving force from a drive source to drive wheels, and outputs a pulse corresponding to the rotational speed, and a pulse that is outputted from the sensor at regular intervals. A counter that counts pulses, and the number of pulses that the counter counted at that time (P2)
and the number of pulses counted earlier (P1) (｜Pc｜
), and a second comparison means that calculates the difference between the difference (|Pc|) and a preset maximum change range (ΔP) of the number of pulses that can occur during steady running; When the difference (|Pc|) between the number of pulses (P1) and (P2) is smaller than the preset maximum change range (ΔP) of the number of pulses that can occur during steady running, the number of pulses counted at that time (P2) determining means for determining that the number of pulses at that time (P2) is a normal value, and conversely, determining that the number of pulses at that time (P2) is an abnormal value when it is larger than a maximum change range (ΔP) of the number of pulses; a first control signal output means for outputting various control signals such as a speed display signal corresponding to the number of pulses (P2) when the number of pulses (P2) of the pulse number (P2) is determined to be a normal value; If the number of pulses (P2) at that time is judged to be an abnormal value, the number of pulses counted earlier (P1
) for adding the maximum change range (ΔP) when Pc>0 and subtracting the maximum change range (ΔP) when Pc<0; ) with the number of pulses (P2) counted at that time and a second control signal output means for outputting the various control signals corresponding to the same number of pulses (P3). Abnormal value correction device for vehicle speed, etc.