JPH0628997B2 - Backup accelerator signal generator - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Industrial Field of the Invention The present invention does not normally output an accelerator signal indicating an accelerator operation amount in a vehicle equipped with an automatic transmission that is controlled according to an operation amount of an accelerator operation member. In this case, the present invention relates to a backup accelerator signal generator for outputting a backup accelerator signal used in place of the accelerator signal.

(Prior Art) In a vehicle equipped with an automatic transmission that is controlled according to the operation amount of the accelerator pedal, the operation amount of the accelerator pedal is detected due to a failure of an accelerator sensor for detecting the operation amount of the accelerator pedal. If the accelerator signal indicating is no longer output correctly, it will cause a serious problem in vehicle driving control. Therefore, a backup device has been proposed in which the accelerator signal is fixed at a predetermined constant level when the accelerator sensor fails (Japanese Patent Laid-Open No. 60-75735).

(Problems to be Solved by the Invention) According to the proposed device, when the accelerator sensor is out of order, the accelerator signal is fixed at a constant level, so that there is no problem in continuing traveling. However, for example, when the accelerator signal is released by releasing the accelerator pedal and the accelerator signal becomes defective, and when the backup accelerator signal is to be supplied, the vehicle will start without permission. It is extremely dangerous.

SUMMARY OF THE INVENTION It is an object of the present invention to provide an improved vehicle back-up accelerator signal generator capable of remedying the above-mentioned problems in the prior art.

(Means for Solving Problems) The content of the present invention for achieving the above-described object is to provide a backup accelerator signal for a vehicle equipped with an automatic transmission that is controlled according to an accelerator operation amount. In the accelerator signal generator, a detection means for detecting whether or not the vehicle is in a start standby state based on a gear set state of the automatic transmission, a clutch connection state and a traveling state of the vehicle, and a detection result of the detection means. In response to the above, when it is detected that the vehicle is in the stand-by state for starting, the backup accelerator signal is a signal indicating a low accelerator operation amount that does not start the vehicle. It is characterized by

(Operation) When the vehicle is in the start standby state, the backup accelerator operation amount indicated by the backup accelerator signal is a low accelerator operation amount at which the vehicle start operation is not executed, for example, the accelerator pedal corresponding to the release of the accelerator pedal. The value is set according to the operation amount. Therefore, when the automatic transmission is in the above-mentioned state, even if the backup accelerator signal is switched to when the accelerator operation amount detection system has some trouble, the vehicle will start against the intention of the operator. It is surely prevented.

(Example) Hereinafter, the illustrated example will be described in detail.

FIG. 1 is a block diagram showing an embodiment of an automatic vehicle metamorphic device equipped with a backup accelerator signal generator according to the present invention. The automatic transmission 1 for a vehicle is operated according to information indicating an operation amount of an accelerator pedal 2 and information indicating an operation position of a selector 3.
Is equipped with. Accelerator pedal 2 is potentiometer 5
The potentiometer 5 converts the operation amount of the accelerator pedal 2 into a voltage signal. The detection voltage VD output from the potentiometer 5 is input to the accelerator signal generating circuit 6, and the accelerator signal generating circuit 6 outputs an actual accelerator signal A according to the operation amount of the accelerator pedal 2 at that time. The actual accelerator signal A is supplied to the automatic transmission mechanism 4 via the first changeover switch 7.

The selector 3 is connected to the position sensor 8, and a position signal SL indicating the operation position selected by the select lever 3 a of the selector 3 is output from the position sensor 8 and supplied to the automatic transmission mechanism 4.

Reference numeral 100 indicates the present invention for generating the backup accelerator signal BA used in place of the actual accelerator signal A when the actual accelerator signal A from the accelerator signal generating circuit 6 is no longer output normally. This is a backup accelerator signal generator. The backup accelerator signal BA is supplied to the first changeover switch 7, and when the failure detection circuit 9 operating in response to the accelerator signal A detects a predetermined abnormal state of the accelerator signal A, the changeover control signal S ₁ is output. As a result, the first changeover switch 7 is changed over from the state shown by the solid line to the state shown by the dotted line.

Therefore, when the actual accelerator signal A is normally output, the first changeover switch 7 selects the actual accelerator signal A and supplies it to the automatic transmission mechanism 4.
Is no longer normally output, the backup selector accelerator signal BA is selected by the first changeover switch 7 in place of the actual accelerator signal A and supplied to the automatic transmission mechanism 4.

The automatic speed change mechanism 4 responds to the signal selected by the first changeover switch 7 and the position signal SL to automatically perform a required speed change operation.

The backup accelerator signal generator 100 includes a first signal generator 10 that outputs a first backup accelerator signal BA ₁ and a first signal generator 11 that outputs a second backup accelerator signal BA ₂ . The first and second backup accelerator signals BA ₁ and BA ₂ are input to the selection switch 12, and the selection control signal S ₂ from the control unit 13 that operates in response to the changeover control signal S ₁ and the position signal SL. In response to the first or second backup accelerator signal BA
Any one of ₁ and BA ₂ is selected by the selection switch 12 and output as the backup accelerator signal BA.

Next, the first signal generator 10 will be described. The first signal generation unit 10 outputs the first backup signal U ₁ corresponding to the actual accelerator signal A when the accelerator pedal 2 is released (when the accelerator operation amount is zero), and the vehicle travels. A second circuit 15 for outputting a second backup signal U ₂ corresponding to a constant accelerator operation amount for maintaining it.
And have.

In the illustrated embodiment, the second circuit 15 is responsive to the position signal SL, and a signal indicating a backup accelerator operation amount that is predetermined according to the operation position of the selector 3 is output as the second backup signal U _2. Has become. That is, the accelerator operation amount for the backup operation indicated by the second backup signal U ₂ is set to a constant value according to the select position determined by the operation of the selector 3 at each time. As a result, it is possible to expect a detailed backup operation according to the operation position of the selector 3.

The first and second backup signals U ₁ and U ₂ are supplied to a second changeover switch 18 which operates in response to a brake signal BK from a brake sensor 17 for detecting the on / off state of the vehicle brake device 16. It has been entered. The brake signal BK is a signal indicating whether the brake device 16 is in an on state (a state in which a braking force is being applied) or an off state (a state in which a braking force is not being applied). When 16 is shown to be in the ON state, the second changeover switch 18 becomes the changeover state shown by the dotted line in FIG. 1, and the first backup signal U ₁ is selectively taken out. On the other hand, when the brake signal BK indicates that the brake device 16 is in the off state, the second changeover switch 18 is in the changeover state shown by the solid line in FIG. 1, and the second backup signal U ₂ is selected. Is taken out. Second
The output from the changeover switch 18 is input to the minimum value selection unit 19.

A block designated by the reference numeral 20 is responsive to the brake signal BK and has a predetermined small accelerator operation amount that does not start the vehicle when the brake device 16 is switched from the on state to the off state and is larger than the predetermined amount. The third of the contents that change so as to increase toward the accelerator operation amount
It is a third circuit that outputs a backup signal U ₃ . Third
Circuit 20 includes a signal source 21 for outputting an initial signal E ₁ indicating the upper limit value of the accelerator operation amount is not started vehicle of the starting control, the initial signal E _1, as will be described later from the minimum value selector 19 Output first backup accelerator signal BA ₁
Is input to the third changeover switch 22 to which is input. The third changeover switch 22 operates in response to the brake signal BK, and when the brake operation 16 is in the off state, the first changeover switch 22
First outputs a backup accelerator signal BA ₁ is switched to the state shown by the solid line in the figure, when the brake device 16 is in the ON state is switched to the state shown in FIG. 1 the dotted lines the initial signal E ₁ Output. The output from the third changeover switch 22 is input to the first input terminal 23a of the arithmetic unit 23.

The arithmetic unit 23 predetermined the calculation for adding the accelerator increase amount ΔA indicated by the signal input to the second input terminal 23b to the accelerator operation amount indicated by the signal applied to the first input terminal 23a. A step amount signal ST having a function of repeatedly executing at time intervals and indicating the accelerator increase amount ΔA is input from the step amount signal generating section 24 to the second input terminal 23b thereof. The step amount signal generator 24 responds to the position signal SL, and the selector 3 at that time
The value of ΔA is determined according to the select position of the step amount signal ST and the signal indicating the determined accelerator increase amount is
Is output as. A signal indicating the result calculated by the calculation unit 23 is output as the third backup signal U ₃ and input to the minimum value selection unit 19.

The minimum value selection unit 19 compares the output from the second changeover switch 18 with the third backup signal U ₃ and outputs a smaller value signal as the first backup accelerator signal BA ₁ at that time.

Next, the operation of the first signal generator 10 will be described.

When the brake device 16 is in the off state, the second and third changeover switches 18 and 22 are changed over as indicated by the solid lines. Therefore, the second changeover switch 18 outputs the second backup signal U ₂ indicating the fixed accelerator operation amount having the value determined by the position signal SL, and is input to the minimum value selection unit 19. On the other hand, the third circuit 2
At 0, the step amount signal ST indicating the accelerator increase amount ΔA determined by the position signal SL is input to the second input terminal 23b of the calculation unit 23, and the first input terminal 2
The first backup accelerator signal BA ₁ is input to 3a via the third changeover switch 22. Therefore, when the sum of the accelerator operation amount indicated by the first backup accelerator signal BA ₁ and the accelerator increase amount ΔA in this case is smaller than the accelerator operation amount indicated by the second backup signal U ₂ , the third backup signal U ₃ is selected by the minimum value selection unit 19 and a new first backup accelerator signal
It is output as BA ₁ . In this way, when the accelerator operation amount indicated by the third backup signal U ₃ sequentially increases and U ₃ > U ₂ , the second backup signal U ₂ is output as the first backup accelerator signal BA ₁ .
Therefore, the content of the third backup signal U ₃ does not become larger than the accelerator operation amount according to the result of adding the accelerator increase amount ΔA to the accelerator operation amount indicated by the second backup signal U ₂ . That is, the brake operation 16
Is off, the second backup signal U ₂ is output as the first backup accelerator signal BA ₁ in the steady state, and the vehicle travel is maintained according to the state of the selector 3 at that time.

When the brake device 16 is in the ON state, the second and third changeover switches 18 and 22 are changed over as shown by the dotted lines in FIG. Therefore, the second backup switch U ₁ is output from the second changeover switch 1 and input to the minimum value selection unit 19. On the other hand, in the third circuit 20, the initial signal E ₁ is input to the first input terminal 23a of the arithmetic unit 23 in place of the first backup accelerator signal BA ₁ ,
Therefore, the content of the third backup signal U ₃ is the initial signal E ₁
Is equal to the result obtained by adding the accelerator increase amount ΔA to the upper limit value of the accelerator operation amount that does not start the vehicle start control. Therefore, the content of the first backup accelerator signal BA ₁ is equal to that of the first backup signal U ₁ . As a result, the vehicle does not start and the brake device 16 can maintain the stopped state.

In this state, when the brake device 16 is released from the on state and turned off, the second and third switching switches 18,
22 is switched as shown by the solid line in FIG. By this switching, the third circuit 20 indicates the accelerator operation amount equal to the upper limit value of the accelerator operation amount at which the vehicle start control is not started, plus the accelerator increase amount ΔA determined by the operation state of the selector 3 at that time. 3 backup signal U ₃ is output, while the first changeover switch 18 outputs a second backup signal U ₂ indicating a fixed accelerator operation amount determined by the operation state of the selector 3 at that time. Here, since U ₃ <U ₂ , the minimum value selection unit 19
Selects the third backup signal U ₃ as the first backup accelerator signal BA ₁ , and the selected first backup accelerator signal BA ₁ is input to the first input terminal 23 a of the arithmetic unit 23 via the third changeover switch 22. To be done. As described above, the output from the arithmetic unit 23 increases stepwise as time passes, but the third backup signal U ₃ is output as the first backup accelerator signal BA ₁ until U ₃ > U _2. Therefore, in the end, the first backup accelerator signal BA ₁ becomes a signal which increases stepwise up to the magnitude of U ₂ . As a result, when the brake device 16 is switched from on to off, the vehicle start control is executed, the accelerator operation amount for backup is sequentially increased, and after reaching a predetermined value, it is fixed to that value. Even when backing up, the vehicle can start smoothly.

The second signal generator 11 has a fixed accelerator operation amount indicating a low accelerator operation amount (for example, an accelerator operation amount of zero) at which the operation for starting the vehicle in the automatic transmission 4 is not started. Backup accelerator signal
It outputs BA ₂ . As will be described later, the control unit 13 includes a state detection unit 34 that detects whether the vehicle is in a start standby state based on the gear set state of the automatic transmission 4, the clutch connection state, and the traveling state of the vehicle. ing. When the control unit 13 detects that the vehicle is in the start standby state, the selection switch 12 is activated in response to this, and the second backup accelerator signal BA ₂ is replaced by the backup accelerator signal BA ₂ instead of the first backup accelerator signal BA _1. It is output as the signal BA.

Next, the control unit 13 will be described with reference to FIG.
In the control unit 13, 31 is a vehicle speed sensor that outputs a vehicle speed signal V that indicates the vehicle speed, and 32 is a gear that outputs a gear position signal GP that indicates the gear position of the transmission (not shown) in the automatic transmission mechanism 4 at each moment. Position sensor, 33 is automatic transmission 4
It is a clutch sensor that outputs a clutch signal CL indicating an on / off state of an internal clutch (not shown). The vehicle speed signal V, the gear position signal GP, and the clutch signal CL are input to the state detection unit 34 to which the switching control signal S ₁ is input. The state detection unit 34 responds to the change of the level of the switching control signal S ₁ from “L” to “H” due to the abnormal state of the actual accelerator signal A, and at this time, the gear set is set in the vehicle transmission. It is determined whether the vehicle speed is zero and the clutch is off and the vehicle speed is zero. In the present embodiment, gear set is performed,
When the clutch is off and the vehicle speed is zero, the level of the output signal DS from the state detection unit 34 is in the "H" level state indicating that the vehicle is in the start standby state.

The control unit 13 further responds to the switching control signal S ₁ and the position signal SL, and stores the operation position of the selector 3 when the level of the switching control signal S ₁ changes from “L” to “H”. The memory data MD having the reference numeral 35 and indicating the storage content of the storage unit 35 is input to the comparison unit 36 to which the position signal SL is input. The comparison unit 36 compares the operation position of the selector 3 at that time indicated by the position signal SL with the operation position stored in the storage unit 35, and the level of the output signal CO is "only" when both are equal. H ”.

The output signals CO and DS are input to the AND gate 37, and the output signal O ₁ from the AND gate 37 is input to another AND gate 38. The switching control signal S ₁ is
It is input to the delay circuit 39, where the switching control signal S ₁ is delayed by a predetermined time Δt and output as a delayed switching control signal SD ₁ . The delay switching control signal SD ₁ is level-inverted by the inverter 40, Is input to the OR gate 41 to which the output signal from the AND gate 38 is input. The output signal O ₂ from the OR gate 41 is input to the AND gate 38, and the selection control signal S ₂ is output from the AND gate 38.

Next, the operation of the control unit 13 shown in FIG.
A description will be given with reference to (a) to FIG. 3 (f). At time t = t ₁ , a malfunction occurs in the accelerator signal A, and the switching control signal S
_When the level of ₁ changes from "L" to "H" (Fig. 3
(a)), in response to this, the state detection unit 34 performs a predetermined state detection operation. t = and gear set is performed at t _1, and when the clutch is speed off is zero, the level of the output signal DS becomes "H" (FIG. 3 (c)).

At this time, the operation position of the selector 3 at that time is further stored in the storage unit 35, and the memory data MD indicating the stored contents and the position signal SL are compared in the comparison unit 36. In this case, the selector 3 is not operated, and thus the output signal CO is at the level “H” (FIG. 3).
(See (d)). Therefore, the level of the output signal O ₁ of the AND gate 37 also becomes “H”, and one input level of the AND gate 38 becomes “H”.

On the other hand, the switching control signal S ₁ input to the delay circuit 39 is
The delay switching control signal SD ₁ is output after a delay of time Δt, and its inverted signal is output. Is input to the OR gate 41. Therefore, the level of the output signal O ₂ remains at the “H” level until time t ₂ when time Δt has elapsed from time t ₁ (FIG. 3 (e)),
The output of the AND locate 38 when the level of the output signal O ₁ becomes "H", i.e. the level of the selection control signal S ₂ is "H" (FIG. 3 (f)), this state gate 4
Since it is fed back to the input side of the AND gate 38 via one output level state of the AND gate 38 will be maintained at "H" level as long as the level of the output signal O ₁ is "H".

When the selector 3 is operated to move to another operation position at time t = t ₃ , the level of the output signal CO changes from “H” to “L”, and thus the level of the output signal O ₁ also changes. (See FIG. 3 (d)). As a result, the level of the selection control signal S ₂ changes from “H” to “L” at t = t ₃ .
Changes to. Inversion signal at this time Because levels are already "L", hereinafter, also the level of the output signal CO to return the selector 3 to the original position as "H" in the example t = t _4, the selection control signal S ₂
Is still at the level "L" (see FIGS. 3 (d) and 3 (f)).

That is, when the level of the output signal DS becomes "H", the selection control signal S ₂ levels "H", thereby switched to selection switch 12 is shown in dotted lines, the second backup accelerator signal BA ₂ is output as the backup accelerator signal BA. As a result, even if the actual accelerator signal A becomes defective in the state where the gear is set and the clutch is off, the backup accelerator signal BA output in place of the actual accelerator signal A is a signal corresponding to zero accelerator operation amount. Because of this, there is no risk that the vehicle will perform a start operation.

Further, when the operator operates the selector 3, the second backup accelerator signal BA ₂
The backup state is canceled by the first backup accelerator signal BA ₁ and the backup state is not restored by the second backup accelerator signal BA ₂ unless the predetermined condition is satisfied again. Therefore, the vehicle can be started, run, and stopped by the backup with the first backup accelerator signal BA ₁ .

Backup accelerator signal generator 1 shown in FIG.
The function similar to 00 can be realized by, for example, causing a microcomputer to execute a predetermined control program. A flowchart showing an example of such a control program is shown in FIG.

Explaining the flowchart shown in FIG. 4,
After the program is started, various input signals are read in step 51, and then, in step 52, it is determined whether or not the flag F ₁ is set. When the program is executed for the first time, the flag F ₁ has been reset by the initialization, so the result of this determination is NO, and the routine proceeds to step 53. In step 53, the operating position SE _N at that time of the selector 3 is set to the data SE, flag F ₁ is set in a next step 54, the process proceeds to step 55.

At step 55, it is judged if the gear of the transmission is set to the neutral (N) position. If the result of the judgment is YES, then the routine proceeds to step 56, at which flag F is set.
₂ is reset. If the determination result of step 55 is NO, the process proceeds to step 57, where it is determined whether or not the clutch is in the on state. Step 57
If the result of the determination is YES, the process proceeds to step 56, while if the result of the determination in step 57 is NO, the process proceeds to step 58. In step 58, it is determined whether or not the vehicle speed V is not zero. If the vehicle speed is not zero, the result of the determination in step 58 is YES and the routine proceeds to step 56, while if the vehicle speed is zero. The determination result in step 58 is NO, and the process proceeds to step 59. In step 59, the content of the data ACC showing the backup accelerator operation amount is set to the state of the accelerator operation amount 0 [%], and then the process returns to step 51.

That is, when the determination results in steps 55, 57, and 58 are all NO, in other words, the gear is in a state other than neutral, the clutch is off, the vehicle speed is zero, and the vehicle is in a start standby state. If so, the content of data ACC corresponds to the release of the accelerator pedal. Therefore, in this case, even if the content of the data ACC is supplied to the automatic transmission mechanism 4 in place of the actual accelerator signal A, the vehicle is not started and the operation is extremely safe. As can be seen from the above description, the content to be set in the data ACC in step 59 is not necessarily limited to the accelerator operation amount of 0%, and the accelerator operation is low enough not to start the vehicle start operation. Any amount will do.

In this way, when step 52 is executed again, the flag F ₁ has already been set in step 54, so the result of the determination is YES, and the routine proceeds to step 60. At step 60, it is judged if the flag F ₂ is set. When the step 60 is executed for the first time, the determination result is NO, and the step 6
Proceeds to 1, operating position of the selector 3 is set to the data SE and now whether or not the current operation position SE _N equals determination is performed, the process proceeds to step 59 in the case of SE = SE _N.

If the operator operates the selector 3 and the determination result in step 61 is NO, the process proceeds to step 62, sets the flag F ₂ and then proceeds to step 63. If the determination result of step 60 is YES or after step 56 is executed, the process proceeds to step 63.

In step 63, it is determined whether or not the brake device 16 is on. If the determination result in step 63 is YES, the process proceeds to step 64, and the content of the data ACC indicating the backup accelerator operation amount is set to the state of 0% accelerator operation amount, and then the process returns to step 51. Therefore, the backup accelerator operation amount in this case is 0 [%].

If the determination result in step 63 is NO, step 6
In step 5, it is determined whether the selector 3 is in the neutral (N) position. If the decision result in the step 65 is YES, the fixed accelerator operation amount ACCN is set as the content of the data ACMAX indicating the maximum backup accelerator operation amount at that time (step 66). If the decision result in the step 65 is NO, a step 67 decides whether or not the selector 3 is in the backward (R) position. When the result of the determination at step 67 is YES, the routine proceeds to step 68, where the content of the data ACCR indicating the fixed accelerator operation amount is the content of the data ACMAX indicating the maximum backup accelerator operation amount at that time. If the decision result in the step 67 is NO, the process advances to a step 69 to decide whether or not the selector 3 is in the second speed (2) position.
If the determination result of step 69 is YES, step 70
Then, the fixed accelerator operation amount ACC2 is set as the content of the data ACMAX indicating the maximum backup accelerator operation amount at that time. If the decision result in the step 69 is NO, the selector 3 is in the drive (D) position, and the step 7
In 1, the fixed accelerator operation amount ACCD is the content of the data ACMAX indicating the maximum backup accelerator operation amount at that time. Here, ACCD>ACC2>ACCR>ACCN> 0.

As can be seen from the above description, when the brake device 16 is in the off state, the content of the data ACMAX indicating the maximum backup accelerator operation amount at that time is one of steps 66, 68, 70 or 71 depending on the position of the selector 3 at that time. , And then proceed to step 72.

In step 72, the backup accelerator operation amount at that time indicated by the data ACC is the data AC indicating the maximum backup accelerator operation amount determined as described above.
It is determined whether or not the value is equal to or larger than the value indicated by MAX. When ACC ≧ ACMAX, the determination result of step 72 is YES, and the routine proceeds to step 73. Here, data AC indicating the maximum backup accelerator operation amount at that time
MAX is set as the content of the data ACC, and the process returns to step 51.

If the determination result in step 72 is NO, step 7
4, the determination is made here whether the selector 3 is in the neutral (N) position. If the decision result in the step 74 is YES, the content of the step amount data ΔA showing the step amount for increasing the accelerator is set to STN (step 75). If the determination result in step 74 is NO, the process proceeds to step 76, where the selector 3 moves backward (R).
It is determined whether or not it is in the position. If the determination result in step 76 is YES, the process proceeds to step 77,
Here, the content of the step amount data ΔA is set to STR. If the determination result in step 76 is NO, the process proceeds to step 78, where it is determined whether or not the selector 3 is in the second speed (2) position. Result of determination in step 78 YE
In the case of S, the process proceeds to step 79, where the value of the step amount data ΔA is set to ST2. If the decision result in the step 78 is NO, the selector 3 is in the drive (D) position, and in the step 80, the value of the step amount data ΔA is
STD In this way, the value of the step amount data ΔA is set in any one of steps 75, 77, 79 or 80 according to each position selected by the selector 3, and the process proceeds to step 81.

At step 81, the step amount data Δ is added to the value of the data ACC.
The value obtained by adding the value of A is set as the content of the new data ACC, that is, the value of the data ACC is increased by ΔA, and the routine proceeds to step 82. In step 82, it is determined whether or not ACC ≧ ACMAX. If ACC <ACMAX, the determination result in step 82 is NO, and the process returns to step 51.
The above operation is repeated. Therefore, the value of the data ACC increases by ΔA every program cycle, and ACC ≧
When ACMAX is reached, the determination result in step 82 is YES, the value of the data ACC is set to the ACMAX value at that time in step 83, and the process returns to step 51.

As can be seen from the above description, when the brake device 16 is in the off state, the backup accelerator operation amount is set to a fixed value determined according to the operation position of the selector 3 at that time. When the brake device 16 is switched from the on state to the off state, the backup accelerator operation amount gradually increases from 0 [%] toward a fixed value determined according to the operation position of the selector 3 at that time. . The increment at this time is determined by the operation position of the selector 3 at that time.

(Effect of the Invention) According to the present invention, as described above, when the vehicle is in the stand-by standby state, the backup accelerator operation amount is set to such a low value that the vehicle does not start the start operation. In such a case, even if the backup accelerator signal is supplied due to a failure of the accelerator operation amount detection system, the vehicle will not start. Therefore, it is possible to reliably prevent problems such as starting of the vehicle due to some trouble in the accelerator operation amount detection system while the operator is leaving the vehicle, and it is extremely safe. A highly reliable backup system can be configured.

[Brief description of drawings]

FIG. 1 is a block diagram showing an embodiment of an automatic vehicle transmission equipped with a backup accelerator signal generator according to the present invention, and FIG. 2 is a detailed block diagram of a control unit shown in FIG. 3A to 3F are time charts for explaining the operation of the control unit shown in FIG. 2, and FIGS. 4A and 4B are backup accelerator signal generation shown in FIG. 9 is a flowchart showing an example of a control program for realizing the same function as that of the apparatus using a microcomputer. 1 ... Automatic transmission for vehicle, 2 ... Accelerator pedal, 3
...... Selector, 4 ...... Automatic speed change mechanism, 10 ...... First signal generating section, 11 ...... Second signal generating section, 12 ...... Selection switch, 13 ...... Control section, V ...... Vehicle speed signal, GP ...... Gear position signal, CL ... Clutch signal, BA ... Backup accelerator signal, BA ₁ ... 1st backup accelerator signal, BA ₂ ... 2nd backup accelerator signal, S ₁ ...
Selection control signal.

Claims (1)

[Claims] 1. A backup accelerator signal generator for outputting a backup accelerator signal for a vehicle, which is provided with an automatic transmission that is controlled according to an accelerator operation amount, in a gear set state, a clutch connection state, and a clutch connection state of the automatic transmission. Detection means for detecting whether or not the vehicle is in a stand-by standby state based on the traveling state of the vehicle, and in the case where it is detected that the vehicle is in a stand-by standby state in response to a detection result of the detection means. Means for setting the backup accelerator signal to a signal indicating a low accelerator operation amount that does not start the vehicle, and a backup accelerator signal generator.