JPH04105247U - Continuously variable transmission gear ratio sensor - Google Patents

Abstract

(57) [Summary] [Purpose] By trimming the printed resistor in the gear ratio sensor of the continuously variable transmission, the output voltage according to the gear ratio of the continuously variable transmission can be adjusted to match the required characteristics, and the driving performance can be improved. The object of the present invention is to make it possible to standardize the data in the ROM of a control microcomputer. [Structure] By trimming the fixed resistor 6A of the printed resistors 6 formed on the resistor substrate 5, the first The output voltage between the external connection printed terminals 10 and 12 corresponding to the sliding positions of the brush 3 and the second brush 4 is adjusted to match the required characteristics, and the data in the ROM of the microcomputer for travel control is Standardize.

Description

[Detailed explanation of the idea]

0001

[Industrial application field]

This invention detects the gear ratio of a continuously variable transmission and outputs a signal corresponding to the gear ratio. Related to speed ratio sensor.

0002

[Conventional technology]

Conventionally, a gear ratio detects the gear ratio of a continuously variable transmission and outputs a signal corresponding to the gear ratio. The sensor is displaced according to the gear ratio of the continuously variable transmission, as shown in FIG. 4, for example. A brush holder 22 is attached to the moving shaft 21, and the brush holder -22 is attached with a first brush 23 and a second brush 24, and the first brush 23 and the second brush 24 are attached to the The brush 23 and the second brush 24 are electrically connected at the brush holder 22. It is. On the other hand, as shown in FIG. A trapezoidal resistor 26 that contacts is printed. In addition, in parallel with the trapezoidal resistor 26 , a printed conductor 27 with which the second brush 24 contacts is formed. and the trapezoid above Printed conductors 28 and 29 are formed on both sides of the resistor 26. Also, printed conductor The ends of 27, 28, and 29 are connected to external connection printed terminals 30, 31, and 32. . Note that FIG. 6 is a side sectional view of the gear ratio sensor housed in the case 40. . There is a space between the external connection printed terminals 31 and 32 of the resistor board 25 formed as described above. A constant voltage is applied, and the first brush 23 and the second brush 24 slide. The voltage between the external connection printed terminals 30 and 32 changes depending on the position. Figure 7 shows continuously variable speed. The externally connected printing end corresponds to the stroke of the moving shaft 21, which is displaced according to the speed ratio of the machine. This shows the output voltage characteristics between the output voltages 30 and 32. It is configured so that the gear ratio of the transmission can be detected.

0003

[Problem that the idea aims to solve]

The above conventional gear ratio sensor has the required characteristics as the solid line curve in Fig. 7. Also, depending on the formation state of the trapezoidal resistor 26, the characteristics may deviate from the required characteristics as shown by the broken line curve. This may result in certain characteristics. Therefore, the gear ratio sensor may look like a broken line curve, for example. If the required characteristics are not met, the driving control microcontroller installed in the vehicle The data in the computer's ROM (read-only memory) is transferred to the actual speed ratio sensor. Since it is necessary to rewrite according to the characteristics, it is difficult to standardize ROM. The problem is that it can't be done. Therefore, in this invention, the printed resistor on the resistor board is formed to be trimmable, and the transmission ratio is After manufacturing the sensor, the speed ratio sensor can be adjusted by trimming the printed resistor. A technical issue to be solved is configuring the output voltage characteristics to match the required characteristics. That is.

0004

[Means to solve the problem]

The technical means to solve the above problem is to shift according to the gear ratio of the continuously variable transmission. A movable contact is attached to the moving shaft, and the movable contact is formed on the board surface. contact with the printed resistor, and change the resistance value according to the gear ratio of the continuously variable transmission. As a result of this, it can be used as a gear ratio sensor for continuously variable transmissions that outputs a voltage signal according to the gear ratio. The printed resistor is connected to a plurality of stepped resistors and electrically connected to the stepped resistors. and a trimmable fixed resistor connected in parallel to the resistor. Moreover, by trimming the fixed resistor, a predetermined voltage signal can be set according to the gear ratio. The first thing to do is to configure the system so that it outputs a number.

[0005]

[Effect]

According to the gear ratio sensor of the continuously variable transmission having the above configuration, the production of the gear ratio sensor After that, the movable contactor is brought into contact with the printed resistor formed on the board surface, and the speed of the continuously variable transmission is changed. By changing the resistance value according to the gear ratio, a voltage signal corresponding to the gear ratio is output. When performing characteristic tests, the output voltage according to the stroke of the moving axis is By trimming the fixed resistor to match the required characteristics , to make the characteristics of the gear ratio sensor of the continuously variable transmission uniform.

[0006]

【Example】 Next, embodiments of the present invention will be described with reference to the drawings. Figure 1 shows a transmission that detects the gear ratio of a continuously variable transmission and outputs a signal corresponding to the gear ratio. It is a perspective external view of ratio sensor-SE. As shown in the figure, the gear ratio of a continuously variable transmission is A brush holder 2 is attached to a moving shaft 1 that is displaced accordingly, and the brush holder 2 is A first brush 3 and a second brush 4 are attached to the brush holder 2. The first brush 3 and the second brush 4 are electrically connected in the second part of the brush holder. It is. FIG. 2 shows a resistance board 5 on which the tips of the first brush 3 and the second brush 4 slide. FIG. The tip of the first brush 3 slides onto the board surface of the resistance board 5. The printed resistor 6 and the printed conductor 7 on which the tip of the second brush 4 slides are shaped like has been completed. The printed resistor 6 has four rectangular fixed resistors 6A formed in series. At the same time, a stepped resistor 6B is connected in parallel to each square fixed resistor 6A. has been done. Each rectangular fixed resistor 6A is formed to be trimmable. has been done. In addition, there is a printed conductor on the right end of the square fixed resistor 6A and the stepped resistor 6B. A printed conductor 9 is connected to the left end. An external connection printed terminal 10 is formed at the end of the printed conductor 7, and a printed terminal 10 is formed at the end of the printed conductor 7. An external connection printed terminal 11 is provided at the end of the printed conductor 8, and an external connection is provided at the end of the printed conductor 9. A continuous printed terminal 12 is formed. A predetermined connection is made between the external connection printed terminals 11 and 12 of the resistor board 5 formed as described above. A constant voltage is applied to the slide positions of the first brush 3 and the second brush 4. The voltage between the external connection printed terminals 10 and 12 changes accordingly. For example, external connection printing A constant voltage of +5 volts is applied to terminal 11 and 0 volts is applied to external connection printed terminal 12. The moving shaft 1 moves according to the gear ratio, and the first brush 3 and the second brush 4 are When the printed resistor 6 and the printed conductor 7 are slid, the external A voltage with a waveform as shown in line A in FIG. 3 is output between the connected printed terminals 10 and 12. . Figure 3 shows the stroke of the moving shaft 1, which is displaced according to the gear ratio of the continuously variable transmission. This shows the output voltage characteristics between the external connection printed terminals 10 and 12, and the A line in Figure 3 is the fixed This shows the output voltage characteristics before trimming the constant resistor 6A, and the B line is fixed. By trimming the constant resistor 6A, the output between the external connection printed terminals 10 and 12 is This shows a characteristic line in which the power voltage is adjusted to meet the required characteristics.

[0007] As described above, by trimming the fixed resistor 6A, the external connection printed end Gear ratio sensor-SE whose output voltage between output voltages 10 and 12 is adjusted to meet the required characteristics is attached to the moving shaft 1 that is displaced according to the gear ratio of the continuously variable transmission, and its output voltage is By inputting the information into the microcomputer of the travel control device (not shown), , the microcomputer recognizes the actual gear ratio. In addition, the gear ratio The required output voltage data of the sensor SE is written to the ROM of the microcomputer. The microcomputer controls the continuously variable transmission based on the ROM data. In addition to speed control, the output voltage from the gear ratio sensor SE is input, and the current This system recognizes the actual gear ratio and performs correction control to achieve the target gear ratio. be.

[0008]

[Effect of the idea]

As described above, according to the present invention, printed resistors on a resistor board can be formed to be trimmable. After manufacturing the gear ratio sensor, by trimming the printed resistor, individual Since the characteristics of the gear ratio sensor can be matched to the required characteristics, it is possible to The data in the ROM of the travel control microcomputer is sent according to the speed ratio sensor. The effect of standardizing ROM is that there is no need to rewrite it. There is fruit.

[Brief explanation of drawings]

FIG. 1 is a perspective view of an embodiment of the present invention.

FIG. 2 is a plan view of a resistance board.

FIG. 3 is an output voltage characteristic diagram of a speed ratio sensor.

FIG. 4 is a perspective view of a conventional gear ratio sensor.

FIG. 5 is a plan view of a resistance board of a conventional speed ratio sensor.

FIG. 6 is a side sectional view of a conventional speed ratio sensor.

FIG. 7 is an output voltage characteristic diagram of a conventional speed ratio sensor.

[Explanation of symbols]

1 Movement axis 2 Brush holder 3 First brush 4 Second brush 5 Resistance board 6 Printed resistor 6A fixed resistor 6B Step resistor 7 Printed conductor 8 Printed conductor 9 Printed conductor 10 External connection print terminal 11 External connection printing terminal 12 External connection printing terminal SE Gear ratio sensor

Claims (1)

[Scope of utility model registration request] 1. A movable contact is attached to a moving shaft that is displaced according to a gear ratio of a continuously variable transmission, and the movable contact is brought into contact with a printed resistor formed on a substrate surface,
A gear ratio sensor for a continuously variable transmission that outputs a voltage signal according to the gear ratio by changing a resistance value in accordance with the gear ratio of the continuously variable transmission, wherein the printed resistor is arranged in a plurality of steps. It is formed by a shaped resistor and a trimmable fixed resistor that is electrically connected in parallel with the stepped resistor, and by trimming the fixed resistor, it can be adjusted to a predetermined shape according to the gear ratio. A gear ratio sensor for a continuously variable transmission, characterized in that the sensor is configured to output a voltage signal of.