JPS5926646A - Display device for automatic transmission control system - Google Patents

Abstract

PURPOSE:To improve the reading characteristic of the titled device, to shorten the display time sharply and to reduce the cost thereof by a method wherein a character display tube is used as a gear position display tube and the tube is made to perform a self-diagonal display function at the same time. CONSTITUTION:When a controller 2 detects that a sensor or an actuator is out of order, an abnormality signal is transmitted from a clock data circuit to a display section. This signal is outputted from a driver 13 after it is waveform- shaped by a register 11 and a decoder 12 of a display section control circuit and is introduced to a seven segment AND circuit 16 through a display tube operating surplus circuit so that a numerical character 1 is outputted to a two segment AND circuit 17. In this case, as a pulse signal from a pulse oscillator has already been inputted to the circuit 17, a waveform pulse is outputted from the circuit 17 to an alarm lamp 18 to thereby flash the latter.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a display device for an automatic transmission control system.

In cars with automatic transmissions, you can move from start to finish by simply operating a single accelerator and brake pedal
Gears are automatically changed from acceleration to deceleration to stopping depending on the driving conditions at the time, and because they are easy to operate, their use is increasing. By the way, when a transmission is electronically controlled using an actuator, a command from a human is received by operating a selector, this is judged by an electronic circuit and output to an actuator, and the actuator operates the speed change operation mechanism. , which performs gear shift control, but in this case, since there is a blank time between the command from the human and the transmission shift, the system is equipped with an interlock function at startup and a gear position display device that allows confirmation of forward/reverse switching status. This is important for operational safety and ease of use. However, in the past, no means had been taken to display this gear position, etc.

On the other hand, cars with automatic transmissions drive without being able to confirm the gear position, and the equipment is complicated, so if an abnormality occurs in the equipment, a self-diagnosis failure display is installed to make it clear. A system is in place. However, conventional self-diagnosis fault display systems use warning lamps and indicate the abnormality by blinking the lamp intermittently.With this method, if there are many detected points, a two-digit display is displayed. It takes a long time, requires reading by counting blinks, and has disadvantages such as being easy to make mistakes in reading.

The present invention aims to improve such conventional drawbacks, and its purpose is to use a Japanese character display tube as the display tube for displaying the gear position, and to make the display tube also serve as a self-diagnosis display. An object of the present invention is to provide a display device for an automatic transmission control system, which can improve readability, greatly shorten display time, and reduce costs by making the display tube dual-purpose.

Next, one embodiment of the present invention will be described in detail using the drawings.

Figure 1 is a block diagram of the automatic transmission control system, where 1 is the display section, 2 is the controller (C/u)
, 6 is a selector, 4 actuators, and 5 is a sensor.

The selector 3 is a human operation command unit that issues commands such as forward movement, stop, and reverse movement. When the controller 2 receives an operation command from the selector 6, the controller 2 determines the control operation based on the input signal from the sensor 5 that detects the state of the vehicle, and outputs the signal to the actuator 4 to drive and control the transmission, engine, etc.

In the display section 1, a shift position signal from the mission gear position sensor is fed back to the controller 2, and the shift position signal is outputted from the controller 2 to the display section 1 to display the shift position.

Figure 2 (5) is a control circuit diagram related to the display section in Figure 1, where the same symbols represent the same things, 11 is a register, 12 is a decoder, 16 is a driver, and 14 is a Japanese character. Display tube, 15 is an oscillator for flashing, 16 and 17 are AND circuits, 18 is a warning lamp for self-diagnosis, 6 is an inspection connector, and 7 is a reset connector.

The register 11 converts the input serial signal of clock data into a parallel signal (command word) from the controller 2.

The decoder 12 converts command words into control signals, and the driver 16 is a drive circuit.

The display tube 14 is a light emitting diode or fluorescent display tube configured with a 7-segment Japanese character display.

The generator 15 outputs waveform pulses.

The inspection connector 6 is a self-diagnosis circuit that is used to display the location of an abnormality when an abnormality occurs.

The reset connector 7 is a connector for erasing the self-diagnosis circuit memory.

The warning lamp 1B is a primary warning for self-diagnosis, and flashes when an abnormality occurs.A red light is preferable for the lamp, and a buzzer is also used to further enhance the warning.

Figure 2 (B) shows a display tube with 7 segments A-G, where 1st gear is represented by segments B, C or E, F, and 2nd gear is represented by segments A, B, D, E,
It is represented by G, and 3rd gear and below are similarly represented as shown in the figure.

In this case, in a normal gear position display, all seven segments A to G are not displayed at the same time.

Figure 2 (Q represents the output of the controller 2, the display section 1
A signal is output from the clock circuit and the data circuit.

To display the gear position, the controller 2 determines the gear position based on the input signal from the position sensor of the transmission actuator 4, and the data/clock circuit displays the serial signal of the data/clock on the display unit 1.
This signal is sent to the register 11 of the display unit 1 control circuit.
The serial signal is converted into a parallel signal (command word) by the decoder 12, and the command word is converted into a control signal by the decoder 12, and then amplified by the driver 15 to drive the display tube 14 to display the gear position. This display will be one of those shown in FIG. 2(B) depending on the gear position at that time.

When an abnormality occurs in the sensors or actuators, the self-diagnosis logic circuit (logic will be described later) determines the abnormality in the controller 2, and the clock signal shown in Fig. 2(c) is activated.
The data circuit sends an abnormal signal to the display section. The signal is waveform-shaped by the register 11 and decoder 12 of the display unit control circuit, and is output from the driver 13, but is guided to the 7-segment AND circuit 16 using the redundant circuit (7-segment operation) for display tube operation. 2 segment and circuit 1
1 is output to 7. Since the pulse signal from the pulse oscillator is input to the 2-segment AND circuit 17,
A waveform pulse is output from the two-segment AND circuit 17, and the warning lamp 18 blinks. in this case,
As mentioned above, if the warning is not sufficient with just the flashing lamp,
It is effective to add a buzzer circuit.

If the above warning indicator lamp flashes,
When the inspection connector provided in advance on the controller 2 section is removed, the signal causes the controller 2 section to ignore the gear position discrimination circuit, prioritize the self-diagnosis circuit, and output it to the display section 1. Accordingly, on the display tube 1, the location of the failure is displayed as a designated number (previously input jersey number, for example 11 for sensor A and 15 for sensor B).

The reset process after repairing the faulty part is performed by removing it from the controller. By removing it, the self-diagnosis memory stored in the microcontroller is erased, the warning lamp goes out, and at the same time the date display tube switches to the gear position display function. That will happen.

Figure 5 shows the self-diagnosis logic using the accelerator potentiometer, accelerator idle switch, and accelerator wide open switch as examples, where 8 is the accelerator pedal, 9 is the accelerator potentiometer (AP), 19 is the accelerator idle switch (ISA), and 20 is the accelerator. It is a wide open switch (WSA).

The accelerator potentiometer (AP) 9 consists of a variable resistor, and the AP voltage is 0 for AP rotation angles of 0° to 60°.
~3■, and the AP setting standard rotation angle, which is the angle actually used, is set to 14° to 46°.

The accelerator idle switch (ISA) 19 is ON when idling, and 9 and OFF in the AP9 rotation angle range of 5° to 20°.
It operates in N-OFF mode and turns OFF at 20° to 50°.

Accelerator wide open switch (WSA) 20 is ON when wide open, AP rotation angle 5° to 37°
It becomes OFF at 57°~5o0, and it operates ON-OFF at 57°~5o0.

Note that the AP is never set below 5° or above 50°, but if it hypothetically falls below 3°, the AP becomes short-circuited, and when it rises above 55°, it becomes open.

FIG. 4 is a flowchart showing the operation based on the self-diagnosis logic of FIG.
If P is less than 3°, the AP will be shorted and a warning will be issued. Further, if the AP is not less than 5 degrees but greater than 55 degrees, the AP is opened and a warning is issued.

Next, if AP is not less than 5° and not greater than 55°, and ISA is ON when 20°≦AP≦55°, a warning will be issued that ISA will not be ON. . At this time, if ISA is not ON or 20°≦AP≦55°, 3°≦AP≦3
If the WSA is ON when the angle is 7°, a warning is issued that the WSA is not ON. On the other hand, WSA is not ON or 3°≦AP≦67
If it is too large, no warning will be issued and the signal will go to EXIT.

FIG. 5 shows another embodiment in which a display tube is used to issue a warning instead of a warning lamp. In the figures, the same parts as in the previous embodiment are designated by the same reference numerals.

21 is an inverter that inverts the output of the AND circuit 16 and outputs it to the OR circuit 22.

In this embodiment, as mentioned above, the number of driving segments of the display tube used to display the gear position is not all segments used when displaying one gear position, so the output of the AND circuit 16 is always at 0 level, and this is inverted. The inverter 21 becomes a level, and T is passed through the OR circuit and the resistor R.
r is input, and the Tr is turned on. Therefore, it is displayed in the same way as in the previous embodiment.

On the other hand, if an abnormality occurs in the sensor or actuator, the output circuit of the driver 16 outputs a rubel to all circuits in response to a transmission signal from the controller, and the display tube 14 displays a date. At the same time, a rubel is output to the AND circuit 16, this output and the pulse output signal from the oscillator 15 are input to the two-segment AND circuit 17, and the pulse output signal from the AND circuit 17 is passed through the entire OR circuit 22 to the display tube ground circuit. is guided to the Tr, and the Tr is intermittently driven. Accompanying this, the display tube 14 flashes the Japanese characters, giving a warning that there is an abnormality. Note that operations for displaying the failure location and resent processing in the event of an abnormality are performed in the same manner as in the previous embodiment.

As described in detail above, the present invention provides a shift position signal from a gear position sensor of an automobile, a sensor,
A signal due to an abnormality occurring in the actuators is fed back to the controller, and is output from the controller to the display section to display the gear shift position.A Japanese character display tube is used as the display tube, and all output circuits to the display tube are connected. Since the output from the AND circuit is also connected to the warning display device, the gear position can be confirmed, unlike conventional automatic transmissions that do not display the gear shift position, ensuring safe operation. Not only is it very useful in terms of ease of use and ease of use, but it is also possible to identify the location of the failure in the event of a failure, unlike conventional systems where you count and read the flashes. Since the information is displayed on the screen, readability can be improved, the display time can be greatly shortened, and costs can also be reduced by using the display tube for multiple functions.

[Brief explanation of the drawing]

1 to 4 show an embodiment of the present invention, in which FIG. 1 is a block diagram, FIGS. 2(A) and 2(C) are circuit diagrams, and FIG.
B) is an explanatory diagram of the display state, No. 6 is an explanatory diagram of the self-diagnosis logic, FIG. 6 [F]) is a side view, and FIG. 4 is a flowchart. FIG. 5 is a circuit diagram showing another embodiment of the warning display device of the present invention. 1...Display unit, 2...Controller, 6...Selector, 6...Inspection connector, 14...Display '1.
16.17...And circuit, 18...Warning lamp patent applicant Isuso Motor Co., Ltd. Agent Patent attorney Minoru Tsuji and one other procedural amendment (voluntary) July 1980, ? Date of 1982 Patent Application No. 135330 3. Relationship with the case of the person making the amendment Patent Applicant 4. Agent address 3-145φ Kanda Ogawa-cho, Chiyoda-ku, Tokyo 101
Date of amendment order (voluntary) 6. Column 7 of "Detailed explanation of the invention" of the specification subject to amendment. 7. Contents of amendment. 12 segments on the 4th, 5th and 7th lines of the same page.
Correct each input.

Claims (1)

[Claims] Shift position signals from the vehicle's gear and f position sensors, as well as signals due to abnormalities occurring in sensors and actuators, are fed back to the controller, and output from the controller to the display section where Japanese characters are displayed on the display tube that displays the shift position. A display device for an automatic transmission control system, characterized in that a display tube is used, all of the output circuits to the display tube are also led to an AND circuit, and the output from the AND circuit is connected to a warning display device.