JPS58191352A - Shift position display unit and throttle opening display - Google Patents

Abstract

PURPOSE:To detect and display the shift position and lock-up condition of an automatic transmission and the opening of a throttle valve by means of decoders which receive the information of the turned-on and -off conditions of solenoids in the automatic transmission and as well of the turned-on and -off conditions of a plurality of switches in a throttle position sensor. CONSTITUTION:A throttle valve open degree decoder 27 detects the opening of a throttle valve 23 by means of throttle signals L1, L2, L3 from a throttle valve opening sensor 1, and displays the detected value on a throttle valve opening display unit 28. A shift position decoder 30 detects the shift position and lock-up condition of an automatic transmission 26 by means of turned-on and -off signals S1, S2, S3 from three solenoids in a hydraulic control system in the automatic transmission 26 and displays the shift position and the lock-up condition on a shift position display unit 31.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a display device that displays the gear position of an automatic transmission and the intake system throttle opening as information to a driver.

In the drive range of an automatic transmission, the engagement of an engagement device provided in parallel to the 1st to 4th gears and the hydraulic torque converter depends on the vehicle speed and throttle opening, that is, the hydraulic torque. Converter lockup is automatically selected and controlled, but in conventional vehicles, the driver is not shown the gear and lockup selection status, and the driver can indirectly determine the selection status from the engine rotation speed and vehicle speed. I had to make a decision. Therefore, the driver
Even if you want to drive with an emphasis on acceleration or fuel efficiency, you may not know how to operate the accelerator pedal1.Furthermore, if you know the throttle opening that is linked to the accelerator pedal, you can easily change the gear position of an automatic transmission at a repair shop or the like. It is very convenient to inspect the relationship with the throttle opening.

An object of the present invention is to provide a display device that displays the gear position and lockup of an automatic transmission, and the intake system throttle opening as information.

In order to achieve this object, the gear stage display device of the present invention provides a plurality of automatic transmissions that control the supply of line pressure to a hydraulic servo of a frictional engagement device by turning on and off an energizing current to a solenoid. The decoder detects lock-up of the gear position and/or the hydraulic torque converter based on whether the energizing current is turned on or off to the solenoid, and a display device that displays the output of the decoder.

Furthermore, the throttle valve opening display device of the present invention includes a throttle opening sensor that detects the opening of the intake system throttle valve, and a display that displays the throttle opening based on the output of the throttle opening sensor. There is.

The present invention will be described in detail with reference to the drawings.

FIG. 1 shows a throttle opening sensor 1 that detects the throttle opening of an intake system throttle valve. Conductor coating 2,
3, 4.5 are formed with a suitable contour extending in the direction of rotation,
E terminal (ground), Ll, L2. Connected to L3 terminal. Two metal plates 6.7 extending in the radial direction and connected to each other rotate integrally with the intake system throttle valve, and movable contacts 8, 9 and 10 are provided at predetermined positions in the radial direction of the metal plates 6, 7, respectively. 11 are provided.

The movable contact 8 is always kept in contact with the conductor coating 2, and the other movable contacts 9, 10, and 11 are in contact with the conductor to be tested 3, 4.5 within a predetermined opening range of the throttle valve.
In this contact state, the L1, L2 and L3 terminals are connected to the E terminal. E as a switch terminal like this
When the connection state between the terminal and the Ll, L2, and L3 terminals is set to ON (ON), and the non-connection state is set to OFF (OFF),
The relationship between on/off of the throttle signals L1, L2 and L3 and the throttle valve opening is shown in FIG.

Figure 3 shows the solenoid 14 installed in the hydraulic control device.
It shows. The solenoid 14 is connected to the input port 1 by an input port 15, an output port 16, and a compression coil spring 17.
The valve body 18 is pressed against the spring 1, and the valve body 18 is
It is provided with a solenoid coil 19 that attracts against the air. When the coil 19 is energized, the valve body 18 is attracted and the input port 15 is opened, and the line pressure is increased to the input port 15.
from there to the output port 16. The output port 16 is connected to the hydraulic servo of the frictional engagement device.

FIG. 4 is a block diagram of an embodiment of the present invention.

The throttle opening sensor l is connected to the throttle valve 23 of the intake passage 22. Detects the opening degree and turns Ll, L2, and L3 on and off! is sent to the electronic control unit 24. Vehicle speed sensor 25 detects vehicle speed, and a vehicle speed signal is sent to electronic control unit 24. The electronic control device 24 is the three solenoids of the hydraulic control device of the automatic transmission 26! 4 Solenoid signal Sl
, S2 , 83 is sent. The throttle opening decoder 27 receives throttle signals Ll, L2 . The throttle opening degree is detected from L3, and the detected value is displayed on the throttle opening degree display 28. The gear stage decoder 30 receives a throttle signal Ll,
The gear position and lockup are detected from L2 and L3, and the gear position and lockup are displayed on the left and right sides of the gear position display 31, respectively. A throttle opening decoder 27 and a gear position decoder 3 are provided for convenience in repair shops, etc.
0 is provided with output terminals 33 and 34 from which voltages related to throttle opening, gear position, and lockup are generated.

FIG. 5 is a chart showing the relationship between the gear position or lockup state and the solenoid signal. Solenoid signal S3
is a signal for controlling engagement of a clutch provided in parallel with the hydraulic torque converter of the automatic transmission 26.

Figure 6 shows throttle opening and throttle signal Ll.

It is a chart showing the relationship between L2 and L3. Throttle opening degree is displayed in eight stages.

FIG. 7 is a circuit diagram of the gear stage decoder 30. Inverters 35, 36 form inverted signals of Sl, 82, and the inputs of AND circuits 37, 38, 39, 40 are configured according to the diagram in FIG. From now on, turn on 1,
OFF will be explained in correspondence with O. AND circuit 37, 3
When the outputs of 8, 39, and 40 are 1, the displays 43, 44, 45, and 46 become valid, and the output becomes 1.2.
, 3.4 are displayed on the left half of the display 31. Signal S3 is sent to display 47 and AND circuits 50, 51
, 52.53 are the first gear mouths respectively? The AND circuit 3
The outputs of 7, 38, 39, and 40 and s3 are connected to the input terminal. AND circuits 37, 38, 39
The outputs of 40, 50, 51, 52, and 53 are connected to variable resistors 58-65, and the tap terminals of variable resistors 58-65 are connected to output terminal 34 through diodes 68-75.
connected to. The tap points of the variable resistors 58 to 65 are adjusted to have different resistance values. Therefore, as shown in FIG. 8, a voltage related to the gear position and lock-up appears at the output terminal 34 and drops. By measuring the voltage at the output terminal 76, the repair shop can detect the gear position and lockup state.

FIG. 9 is a circuit diagram of the throttle opening recorder 27.

Ll, L2 by inverters 81, 82, 83
．． An inverted signal of L3 is formed. The AND circuits 85 to 92 select input signals according to the diagram of FIG.
Each generates an output of 1 when the throttle opening is 1 to 8. OR circuits 96 to 102 each receive the outputs of AND circuits 85 to 91 as input signals, and further receive the outputs of OR circuits 97 to 102 and AND circuit 92 one stage higher as input signals. OR circuit 9
6 to 102 and the output terminals of the AND circuit 92 are connected to the display lamps 104 to 111 of the throttle opening indicator 28.
Not only the lamps corresponding to throttle openings from 1 to 8, but also all the lamps lower than that are lit (bar graph type). AND circuit 85 to 9
The outputs of 2 are sent to variable resistors 114-121, and the tap voltages of variable resistors 114-121 are sent to output terminal 33 via diodes 125-132. The tap points of variable resistors 114 to 121 are adjusted to have different resistance values. Therefore, a voltage related to the throttle opening appears at the output terminal 33. FIG. 10 shows changes in the voltage V at the output terminal 133 with respect to changes in the throttle opening.

FIG. 11 is a block diagram of another embodiment of the invention. The signals Sl, S2, S3 are sent to a decoder 137 consisting of a PROM, and Ll, L2, L3 are sent to a decoder 137 consisting of a PROM.
It is sent to another decoder 138 consisting of OM. FIG. 12 shows the contents of the program of the decoder 137. Input signal Sl, S2's 83 to address terminal AO
, AI, and A2, and a total of eight selection situations of gear speed and lockup are made to correspond to addresses defined by AO, At, and A2. Naoshi means a lockup state. Each address has a DO
Data consisting of D7 to D7 correspond, and data relating to the gear position appears at the data terminals of the decoder 137. If Do, DI, . The output of the decoder 13 is displayed as 1, 2, 3, etc. on the gear position indicator I42. ..., 3L, 4L, and are sent to the gear stage output terminal 141 via a DA (digital-to-analog) converter 139 and an operational amplifier +40.

In this way, a display corresponding to the data from the decoder 137 is displayed on the gear stage display 142, and an output voltage corresponding to the data from the decoder 137 appears at the gear stage output terminal 41. This output voltage corresponds to the decimal number in the chart of FIG. FIG. 13 shows the program contents of the decoder 13.8. Ll, L2゜L3 to address AO, At
, A2. Data represented by data DO to D7 is associated with each address. The data from the decoder 138 is displayed on the throttle opening indicator 144 in a pergraph format. The output of decoder 138 is sent to throttle opening output terminal 147 via resistor circuit 145 and operational amplifier 146. Details of the resistor circuit 145 are shown in FIG. It is connected to the input terminal of the operational amplifier 140 of the PROM 138 and to the resistor 168, and the resistance value decreases in the order of the resistors 160, 161, . . . 166. Therefore, D7, D6,
. . . The input voltage of the operational amplifier 140 decreases in the order of DO. FIG. 15 shows another embodiment of the throttle opening indicator. This throttle opening indicator 170 graphically represents the actual position of the throttle valve.

In the embodiment, the gear position and the like are displayed using a dedicated display, but it is also possible to use a display such as a clock or a cruise computer in common to display the gear position and the like. Furthermore, the throttle opening display device is applicable not only to vehicles with automatic transmissions but also to vehicles with manual transmissions. In the embodiment, the throttle opening sensor consists of three switches that are turned on and off in response to different predetermined openings of the throttle valve, but the output voltage is continuously changed in relation to the throttle opening. A potentiometer type may be used. In this case, a needle type may be used as the throttle opening degree indicator. Furthermore, the gear position decoder and the throttle opening degree decoder can also be built into the electronic control unit 24.

As described above, according to the present invention, the decoder determines the gear stage by turning on and off the energizing current of the solenoid of the automatic transmission and turning on and off the plurality of switches of the throttle position sensor.
Lock-up and throttle valve opening can be detected and displayed to the driver as information, and the driver can use this information to drive appropriately.

[Brief explanation of the drawing]

Figure 1 is a configuration diagram of the throttle opening sensor, Figure 2 is a graph showing the relationship between the throttle valve opening and the throttle signal, Figure 3 is a configuration diagram of the solenoid of the hydraulic control device, and Figure 4 is the invention of the present invention. FIG. 5 is a diagram showing the relationship between the gear position and the solenoid signal, FIG. 6 is a diagram showing the relationship between the throttle opening and the throttle signal, and FIG. 7 is a diagram showing the relationship between the gear shift and the solenoid signal. A circuit diagram of the gear stage decoder, FIG. 8 is a graph showing the relationship between the voltage at the output terminal of the gear stage decoder of FIG. 7 and the gear stage, and FIG. 9 is a circuit diagram of the throttle opening degree decoder of FIG. 4.
Fig. 10 is a graph showing the relationship between the voltage at the output terminal of the slot opening decoder and the throttle opening, Fig. 11 is a block diagram of another embodiment of the present invention, and Fig. 42 is for the solenoid signal of Fig. 11. Diagram showing the program contents of FROM, No. 13
The figure shows the program contents of the throttle signal FROM shown in Fig. 11, Fig. 14 is a detailed circuit diagram of the resistance circuit shown in Fig. 11, and Fig. 15 is a graph showing another embodiment of the throttle opening indicator. It is. Patent Applicant Toyota Motor Corporation - Outside Attorney Patent Attorney Nakahira Harishino L2 E
LIL3 7 15 25 35 50 65
85 111+1 Throttle valve opening [%
J Fig. 4A Belom Seven Pig Drive--C11') →
N, -10...R-1)-

Claims (1)

[Scope of Claims] 1. In an automatic transmission that controls the supply of line pressure to a hydraulic servo of a frictional engagement device by turning on and off the current flowing to the trenoids, the invention includes a system that controls the supply of line pressure to the hydraulic servo of a friction engagement device by turning on and off the energizing current to a plurality of trenoids. A gear stage display device comprising: a decoder that detects lockup of a gear stage and/or a hydraulic torque converter; and a display device that displays the output of the decoder. 2. A gear stage display device comprising a throttle opening sensor that detects the opening of an intake system throttle valve, and a display that displays the throttle opening based on the output of the throttle opening sensor. . 3. The throttle opening sensor is composed of a plurality of switches that are turned on and off in response to different predetermined openings of the intake system throttle valve, and the output of a decoder that detects the throttle opening from the outputs of the plurality of switches is Claim 2, wherein the display device displays
Throttle opening degree display device as described in .