JPH052864B2 - - Google Patents

Description

Detailed Description of the Invention (Field of Industrial Application) The present invention provides a speed change command to a controller by operating a select switch, operates an electromagnetic means based on the control command of the controller, and uses the electromagnetic means to operate an electromagnetic means. The present invention relates to a transmission device for an automatic transmission that switches a manual valve of the automatic transmission to a transmission position corresponding to a transmission command.

(Prior Art) As disclosed in Utility Model Application No. 57-25237, there has been known a transmission device for an automatic transmission in which a manual valve of the automatic transmission is switched to each shift position by operating a select switch. It is being This conventional automatic transmission transmission device includes a select switch that issues a shift command, an electromagnetic means that switches the manual valve of the automatic transmission to each shift position, and this electromagnetic means moves the manual valve to the shift position corresponding to the shift command. The controller includes a controller that receives a speed change command from a select switch and issues a control command to the electromagnetic means. In this conventional automatic transmission transmission device, when a shift command is given to the controller by operating a select switch, the controller issues a control command to the electromagnetic means so that the electromagnetic means switches the manual valve to the shift position corresponding to the shift command. However, if a failure occurs in the controller, there is a risk that it will issue a control command to the electromagnetic means that is different from the control command corresponding to the speed change command by operating the select switch.

(Object of the Invention) The present invention has been made in view of the problems of the prior art described above, and its purpose is to reliably give a speed change command to the electromagnetic means even when a failure occurs in the controller. An object of the present invention is to provide a transmission device for an automatic transmission that can perform the following functions.

(Structure of the Invention) In order to achieve the above object, the present invention includes an electromagnetic means for switching a manual valve of an automatic transmission to each shift position, a select switch for issuing a shift command, and the electromagnetic means is connected to the manual valve. a controller that receives a shift command from the select switch and issues a control command to the electromagnetic means so as to change the shift position to a shift position corresponding to the shift command; controller failure determination means that determines a failure of the controller; control command blocking means for blocking a control command to the electromagnetic means based on the controller failure determination means so that the controller does not control the electromagnetic means; and stop detection means for detecting a stopped state of the vehicle. , a failure in which the electromagnetic means is provided in a separate system from the controller and controls the electromagnetic means so that when the controller fails and the vehicle is stopped, the electromagnetic means switches the manual valve to a shift position corresponding to a shift command. There is a configuration comprising: a time control means;

With the above configuration, when the controller fails, the control command blocking means prevents the controller from controlling the electromagnetic means, and then the failure control means provided in a separate system from the controller Since the electromagnetic means is controlled to switch the manual valve to the shift position corresponding to the shift command, even if a failure occurs, the shift command can be reliably given to the electromagnetic means.

Moreover, since the above-mentioned operation at the time of failure can be caused when the controller fails and the vehicle is stopped, stability can be improved.

(Example) An example of a transmission device for an automatic transmission according to the present invention will be described below based on the drawings.

In FIG. 1, 1 is a select switch, and this select switch 1 has a P range switch, an R range switch, an N range switch, a D range switch, a 2nd speed range switch, and a 1st speed range switch. Here, the select switch 1 has a self-resetting push button configuration. The select switch 1 has a function of issuing a speed change command to the controller 2, and the controller 2 receives the speed change command from the select switch 1 and uses electromagnetic means 3, which will be described later.
It has the function of issuing control commands. Electromagnetic means 3
has a function of switching the manual valve of the automatic transmission 4 to each shift position, and here, a motor is used as the electromagnetic means 3, and 5 is an engine. The controller 2 is a logic circuit section 6
and controller failure determination means 7,
As shown in FIG. 2, the logic circuit section 6 receives, in addition to the gear change command from the select switch 1, an ignition signal IG, an engine speed signal S, an output signal L from the alternator L terminal, etc. It's summery. Here, the controller failure determination means 7 determines whether the controller 2 is malfunctioning by monitoring whether or not a signal output while the program draws one loop is output at regular intervals. This failure determination method has been used for a long time.In addition, failure of the controller 2 can also be determined based on whether noise is generated in an unused area of the logic circuit section 6. can. The logic circuit section 6 includes
The battery voltage +B is stepped down and applied via a regulator R, and a portion of the stepped down voltage is used as a power supply voltage for a motor drive circuit, which will be described later, and a shift position display circuit, which will be described later.
The logic circuit section 6 has a P input terminal, an R input terminal, an N input terminal, a D input terminal, a 2nd speed input terminal, and a 1st speed input terminal to which a speed change command is input, and a control command corresponding to the speed change command, which will be described later. It has a P output terminal, an R output terminal, an N output terminal, a D output terminal, a 2nd speed output terminal, and a 1st speed output terminal that output to the motor drive circuit. Here, a gear change command is input to each input terminal when the select switch 1 is closed, and the logic circuit section 6 is operated even when the input falls from high to low. .

8 is the safety control circuit and controller 2
When the controller 2 fails, the electromagnetic means 3
control command blocking means 9 for blocking a control command to the electromagnetic means 3 based on the controller failure determination means 7 so that the controller 2 is not controlled;
Failure control means 10 is provided in a separate system from the controller 2 and controls the electromagnetic means 3 so that when the controller 2 fails, the electromagnetic means 3 switches the manual valve of the automatic transmission 4 to a shift position corresponding to a shift command.
The detailed structure of the control command blocking means 9 and the failure control means 10 will be described later. Next, based on FIGS. 3 and 4, the motor as the electromagnetic means 3 The configurations of the motor drive circuit 11 and the shift position display circuit 12 that drive the motor will be explained.

The motor drive circuit 11, as shown in FIG.
Motor drive power supply circuit 13 and reference voltage setting circuit 1
4, a forward/reverse control circuit 15, a forward/reverse current supply circuit 16, and a shift position detection device 17. The motor drive power supply circuit 13 includes a voltage step-down regulator 18 and a voltage step-up DC/DC converter 19. Reference voltage setting circuit 14
has a function of applying a reference voltage to the positive terminal of the operation amplifier amplifier 20 that constitutes a part of the forward/reverse control circuit 15, and the voltage divider circuit 2
1, and reference voltage setting switches 22-27. Here, electromagnetic relays are used for the reference voltage setting switches 22 to 27, and 2
2a to 27a are reference voltage setting switches 22 to 2
7 contacts, 22b to 27b are each contact 22a to 27
This is a coil that opens and closes a. Here, each of the coils 22b to 27b is energized when the output from each output terminal of the logic circuit section 6 falls from high to low, and the contact 27a is activated by a control command from the P output terminal. The contact 26a is closed by the control command from the R output terminal, and the contact 26a is closed by the control command from the R output terminal.
5a is closed by a control command from the N output terminal, contact 24a is closed by a control command from the D output terminal, and contact 23a is closed by a control command from the 2nd speed output terminal. , the contact 22a is closed by a control signal from the first speed output terminal, and when the contact 27a is closed, the reference voltage E1 is applied to the positive terminal of the operator amplifier amplifier 20. When the contact 26a is closed, the reference voltage E2 is applied to the positive terminal of the operator amplifier amplifier 20, and when the contact 25a is closed, the reference voltage E3 is applied to the positive terminal of the operator amplifier amplifier 20. When contact 24a is closed, reference voltage E4 is applied to the positive terminal of operator amplifier amplifier 20, and when contact 23a is closed, reference voltage E5 is applied to the positive terminal of operator amplifier amplifier 20, and contact 22a is applied to the positive terminal of operator amplifier amplifier 20. When is closed, a reference voltage E6 is applied to the positive terminal of the operator amplifier amplifier 20, and each of the reference voltages E1 to E6 corresponds to each shift position.

A potentiometer is used in the shift position detection device 17, and 17a is a slider thereof;
b is its resistor. The slider 17a is configured to be interlocked with a motor as the electromagnetic means 3, and its shift position detection potential Eg is applied to the negative terminal of the operator amplifier amplifier 20 via a resistor. This operation amplifier amplifier 20 compares any one of the reference voltages E1 to E6 with the gear shift position detection potential Eg, and rotates the motor as the electromagnetic means 3 in the direction in which the potential difference becomes smaller. It has a function of controlling the current supply circuit 16. The forward/reverse current supply circuit 16 is roughly composed of a forward/reverse current supply circuit 28 and a reverse current supply circuit 29, and the forward/reverse current supply circuit 28 is roughly composed of a switching transistor 30 and a reverse current prevention diode 31. The reverse current supply circuit 29 is generally composed of a switching transistor 32 and a reverse current prevention diode 33. Here, if the shift position detection potential Eg is lower than the reference voltage applied to the positive terminal of the operator amplifier amplifier 20,
The switching transistor 30 of the normal rotation current supply circuit 28 is turned on, and a normal rotation current in the direction of arrow A is supplied to the motor as the electromagnetic means 3. When the shift position detection potential Eg is high, the switching transistor 32 of the reverse current supply circuit 29 is turned on and a reverse current in the direction of arrow B is supplied to the motor as the electromagnetic means 3, and the switch is activated. transistor 3
0,32 is the operator amplifier amplifier 2
It is designed to be turned off when the potential difference between the reference voltage inputted to 0 and the shift position detection potential disappears. Note that the output voltage +15V of the DC/DC converter 19 is applied to the operation amplifier amplifier 20, and the output voltage of the DC/DC converter 19 is applied to the collector terminal of the switching transistor 30.
9 is applied with an output voltage of +15V, and an output voltage of -15V of the DC/DC converter 19 is applied to the collector terminal of the switching transistor 32.

The shift position display circuit 12 has a function of lighting up to indicate which gear shift range the shift position is in, and as shown in FIG. 4, it has a lighting control circuit 34,
It is composed of a display 35 and a display position detection device 36. The lighting control circuit 34 is roughly composed of a switching transistor drive circuit 37 and a switching transistor group 38, and the switching transistor drive circuit 37 is composed of a voltage dividing circuit 39, a comparison circuit 40, a logic circuit 41, and a switching transistor drive circuit 37. have. The voltage dividing circuit 39 has a function of applying a reference voltage to each of the comparators 40a to 40f constituting the comparator circuit 40. Here, the reference voltage G1 is applied to the positive terminal of the comparator 40a, and the Vessel 4
A reference voltage G2 is applied to the positive terminal of 0b,
A reference voltage G3 is applied to the positive terminal of the comparator 40c, a reference voltage G4 is applied to the positive terminal of the comparator 40d, a reference voltage G5 is applied to the positive terminal of the comparator 40e, and a positive voltage of the comparator 40f is applied. A reference voltage G6 is applied to the terminal, and the voltage decreases from the reference voltage G1 to the reference voltage G6. Display position detection device 3
6 uses a potentiometer,
It is roughly composed of a resistor 36a and a slider 36b. The slider 36b is configured to be interlocked with a motor as the electromagnetic means 3, and its detection potential Gf is applied to the negative terminals of each of the comparators 40a to 40f. Each comparator 40a to 40f outputs a low signal to the logic circuit 41 when the detected potential is larger than the reference voltage, and outputs a high signal when the detected potential Gf is smaller than the reference voltage. A signal is output to the logic circuit 41. The logic circuit 41 selects the switching transistor group 3 based on the output signal from the comparison circuit 40.
8 selectively drives the inverter elements 42 to 8.
47 and NAND circuits 48-52. The switching transistor group 38 is composed of switching transistors 53 to 58, and each of the switching transistors 53 to 58 is turned on when a high signal is input as a drive signal from the logic circuit 41. Display 35
is composed of a plurality of LED elements 59 to 64, in which the LED element 59 corresponds to the parking range, the LED element 60 corresponds to the reverse range, the LED element 61 corresponds to the neutral range, and the LED element 61 corresponds to the neutral range. 62 corresponds to the drive range,
The LED element 63 corresponds to the 2nd speed range, and the LED element 64 corresponds to the 1st speed range, and is energized and lights up when each of the switching transistors 53 to 58 is turned on. The output of the NAND circuit 48 is high only when the detection potential Gf is between the reference voltages G1 and G2, and the output of the NAND circuit 49 is high only when the detection potential Gf is between the reference voltages G2 and G3. The output of the NAND circuit 50 is high only when the detection potential Gf is between the reference voltages G3 and G4, and the output of the NAND circuit 51 is high only when the detection potential Gf is between the reference voltages G4 and G5. The NAND circuit 52 is configured to become high only when the detected potential Gf is between the reference voltages G5 and G6. Therefore, when the detected potential Gf is larger than the reference voltage G1,
When the LED element 59 is turned on and the detected potential Gf is between the reference voltages G1 and G2, the LED element 60
is lit, and the detection potential Gf is set to the reference voltages G2 and G3.
If it is between, the LED element 61 is lit,
When the detection potential Gf is between the reference voltages G3 and G4, the LED element 62 is lit, and when the detection potential Gf is between the reference voltages G4 and G5, the LED element 63 is lit, and the detection potential Gf is Reference voltage G5,
When it is between G6, the LED element 64 is turned on.

Next, the control command blocking means 9 and failure control means 10 that constitute the safety system control circuit 8 will be explained with reference to FIG.

The failure control means 10 includes a shift command blocking means 65
have. The gear change command blocking means 65 is composed of OR circuits 65a to 65f. One input terminal of each of the OR circuits 65a to 65f receives a gear change command from the select switch 1, and other input terminals of the OR circuits 65a to 65f. A failure determination signal from the controller failure determination means 7 is input to the terminal. Here, the controller failure determination means 7
When a failure occurs in the controller 2, a high signal is output, and when no failure occurs, a low signal is output. Each output of the OR circuits 65a to 65f is connected to P of the logic circuit section 6,
They are input to the R, N, D, 2nd speed, and 1st speed input terminals, and when the controller 2 fails, the output of each OR circuit 65a to 65f becomes high regardless of whether or not the select switch 1 is operated. Therefore, the gear change command is blocked. Reference numeral 66 denotes an LED element for indicating a controller failure, which is energized when a failure occurs in the controller 2.

The safety system control circuit 8 is provided with a safety switch 67.
are connected to one input terminal of the NAND circuits 68 to 73, and are connected to each of P, R, N, D, and 2 of the select switch 1.
The speed range switch and the first speed range switch are connected to other input terminals of the NAND circuits 68 to 73, respectively. The NAND circuits 68 to 73 are such that when any one of the select switches 1 and the safety switch 67 are closed at the same time, the NAND circuit corresponding to the closed select switch 1 becomes high.
It constitutes a selection circuit that selects a speed change command. The outputs of the NAND circuits 68 to 73 are input to a 6-input OR circuit 74 and a security circuit 75, respectively. The security circuit 75 is composed of AND circuits 76-81. AND circuit 7
The output of the NAND circuit 68 is input to one input terminal of the AND circuit 77 , the output of the NAND circuit 69 is input to one input terminal of the AND circuit 78 , and the output of the NAND circuit 70 is input to one input terminal of the AND circuit 78 . The output of the NAND circuit 71 is input to one input terminal of the AND circuit 79, the output of the NAND circuit 72 is input to one input terminal of the AND circuit 80, and the output of the NAND circuit 72 is input to one input terminal of the AND circuit 81. The output of the NAND circuit 73 is input, and a stop signal from the stop detection means 100, such as a vehicle speed 0 signal or a handbrake on signal, is input to other input terminals of the AND circuits 76-81. This AND circuit 76-81
When the stop signal is high and the outputs of the NAND circuits 68 to 73 are high, the high signal is sent to the reset terminal R of the set priority flip-flop circuits 82 to 87, which are control circuits that control the motor drive circuit 11. It is assumed that the output will be sent to the destination. The security circuit 75 has a function of preventing a control command from being applied to the motor drive circuit 11 even when the controller 2 is out of order except when a stop command is applied.
In addition to the security provided by The set priority flip-flop circuit 82 has the function of switching the automatic transmission 4 to the P range.
3 has a function of switching the automatic transmission 4 to the R range, a set priority flip-flop circuit 84 has a function of switching the automatic transmission 4 to the N range, and a set priority flip-flop circuit 85 has a function of switching the automatic transmission 4 to the N range.
The set priority flip-flop circuit 86 has the function of switching the automatic transmission 4 to the 2nd speed range, and the set priority flipflop circuit 87 has the function of switching the automatic transmission 4 to the 1st speed range. are doing. A failure determination signal is input to the set terminals S of the set priority flip-flop circuits 82 to 87 via an inverter element 88 and an OR circuit 89, and an output of the OR circuit 74 is input via a one-shot circuit 90 and an OR circuit 89. They are each entered separately. Set priority flip-flops 82-87
When a high signal is input to the set terminal S,
The Q terminal outputs a high signal, and the motor drive circuit 11 operates with a low signal, so when the controller 2 is not malfunctioning, the output from the controller failure determination means 7 is low. The input to the set terminal S becomes high, the output of the Q terminal becomes high, and the controller 2
When there is no failure, the control commands from the set priority flip-flop circuits 82 to 87 are sent to the motor drive circuit 11.
It doesn't matter.

The control command blocking means 9 is composed of OR circuits 91 to 96, and one input terminal of the OR circuits 91 to 96 receives signals from the P, R, N, D, 2nd speed, and 1st speed output terminals of the logic circuit section 6. The output is input and the OR circuit 91~
The output from the controller failure determination means 7 is input to the other input terminals 96, and the outputs from the OR circuits 91 to 96 and the set priority flip-flop circuits 82 to 96 are input to the other input terminals.
Each output of the Q terminal 87 is connected to the motor drive circuit 1 through backflow prevention diodes 97 and 98.
1, and when the controller 2 fails, the output from the failure determination means 7 becomes high, so the output from the control command blocking means 9 becomes high, and the motor drive circuit by the controller 2 becomes high. 11 is blocked. Further, the input to the set terminal S of the set priority flip-flop circuits 82 to 87 becomes low, but the Q terminal thereof maintains high.
Control commands are not executed.

On the other hand, when a stop signal is input to the safety circuit 75, if one of the select switches 1 and the safety switch 67 are pressed at the same time, the set priority flip-flop circuit corresponding to that speed change command is reset. The output of the Q terminal becomes low, a control command corresponding to the speed change command is commanded to the motor drive circuit 11, and the electromagnetic means 3 is driven so that the automatic transmission 4 is at the speed change position corresponding to the speed change command. It will be done.

Note that the OR circuit 74 and the one-shot circuit 90 are the set priority flip-flop circuits 82 to 87.
It has a function of setting the set priority flip-flop circuits 82 to 87 and making the output of the Q terminal high in advance when switching the control command.

(Effects of the Invention) As described above, the present invention makes it possible to reliably give a shift command even when the controller is out of order, and to improve safety at that time.

[Brief explanation of the drawing]

FIG. 1 is an overall configuration diagram of a transmission device for an automatic transmission according to the present invention. FIG. 2 is a configuration diagram of main parts of a transmission device for an automatic transmission according to the present invention. FIG. 3 is a motor drive circuit diagram of a transmission device for an automatic transmission according to the present invention. FIG. 4 is a shift position display circuit diagram of the automatic transmission transmission device according to the present invention. FIG. 5 is a detailed view of the main parts of the automatic transmission transmission device according to the present invention. 1...Select switch, 2...Controller, 3
...Electromagnetic means, 4...Automatic transmission, 7...Failure determination means, 9...Control command blocking means, 10...Failure control means, 67...Safety switch, 68-73...NAND circuit, 82-87...Set priority flip-flop circuit.

Claims (1)

[Scope of Claims] 1. Electromagnetic means for switching a manual valve of an automatic transmission to each shift position; a select switch for issuing a shift command; and such that the electromagnetic means switches the manual valve to a shift position corresponding to the shift command. , a controller that receives a speed change command from the select switch and issues a control command to the electromagnetic means; a controller failure determination means that determines a failure of the controller; and a controller that controls the electromagnetic means by the controller when the controller fails. control command blocking means for blocking a control command to the electromagnetic means based on the controller failure determination means; stop detection means for detecting a stopped state of the vehicle; Failure control means for controlling the electromagnetic means so that the electromagnetic means switches the manual valve to a shift position corresponding to a shift command when the controller fails and the vehicle is stopped. A transmission device for an automatic transmission.