JP2000046511A - Throttle valve opening detector - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enhance reliability of output signal by providing a pair of variable resistors having a pair of arcuate variable resistors and a pair of arcuate I/O conductors on one substrate and arranging I/O terminals and a common ground terminal collectively at one part of the substrate. SOLUTION: A throttle valve in the intake system of an internal-combustion engine is fixed to a throttle valve shaft having one end coupled with a lever which is linked with a lever 6 on the side of a throttle valve opening detector. Rotation of the throttle valve shaft is transmitted through the lever 6 to a rotator 7. Brushes 8a, 8b are fixed to the rotator 7 and throttle valve opening is detected based on an output value being obtained when the brushes 8a, 8b slide on resistor patterns 1a, 1b on a resistor substrate 9. Voltages 3a, 4a are outputted from the connecting terminals 3, 4 of a variable resistor. Erroneous detection due to instantaneous interruption of output can be prevented by providing two or more resistor patterns 1a, 1b for equalizing the output voltages 3a, 4a.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a throttle valve opening detecting device for detecting the opening of a throttle valve for adjusting an intake air amount of an internal combustion engine, and more particularly to a variable resistor type throttle comprising a brush and a resistance pattern. The present invention relates to a valve opening detection device.

[0002]

2. Description of the Related Art As disclosed in Japanese Patent Application Laid-Open No. 63-238404, a conventional device has one variable resistor (one set) composed of a brush and a resistor pattern. Therefore, there is a problem that the reliability of the output signal is low. In this regard, it has been considered that a throttle valve opening detection device is constituted by two sets of variable resistors, and the mutual variable resistors are used to assure each other.
63-27812).

[0003]

However, if the throttle valve opening detecting device is constituted by two sets of variable resistors, the device becomes large and impractical. An object of the present invention is to provide a small throttle opening detection device using two sets of variable resistors.

[0004]

According to the present invention, there is provided a throttle valve opening detecting device for detecting an opening of a throttle valve for adjusting an amount of air taken into an internal combustion engine. And a pair of variable resistors, a pair of arc-shaped variable resistors provided on one substrate, a pair of arc-shaped input / output conductors, and The input / output and ground terminals are disposed, and the ground terminal is one common ground terminal among the input / output and ground terminals.

A throttle valve opening detecting device for detecting the opening of a throttle valve for adjusting the amount of air taken into the internal combustion engine,
It is constituted by a pair of rotary variable resistors, the pair of variable resistors are provided on one substrate, a pair of arc-shaped variable resistors, a pair of arc-shaped input / output conductors, and one portion of the substrate. It has input / output and ground terminals arranged collectively, and among the input / output and ground terminals, the input terminal is one common input terminal.

A throttle valve opening detector for detecting the opening of a throttle valve for adjusting the amount of air taken into the internal combustion engine,
It is constituted by a pair of rotary variable resistors, the pair of variable resistors are provided on one substrate, a pair of arc-shaped variable resistors, a pair of arc-shaped input / output conductors, and one portion of the substrate. It has an input / output and a ground terminal collectively arranged, and among the input / output and the ground terminal, a ground terminal is a common ground terminal and an input terminal is a common 1 terminal.
One input terminal.

[0007]

According to the present invention constructed as described above, the number of terminals of the two sets of rotary variable resistors can be reduced. Therefore, when the terminals are collectively arranged at one place on the substrate, the arrangement of the terminals is reduced. The occupied width can be reduced.

In a specific configuration, an output terminal is disposed between an input terminal and a ground terminal, so that
Wiring between the output and ground three terminals can be simplified. In FIG. 1 of the embodiment, the input and the ground are shared as one terminal each, and the input / output 1 / output 2
Since it is arranged with the ground, the relationship between the input, output 1 and ground terminals is simplified, and the relationship between the input, output 2 and ground terminals is also simplified.

[0009]

1 to 4 show a throttle valve opening detecting device according to an embodiment of the present invention.

The operation of the throttle valve opening detecting device having the above structure will be described.

Although not shown, a throttle valve in the intake system of the internal combustion engine is attached to a throttle valve shaft, and a lever is connected to one of the shaft ends of the throttle valve shaft. It is connected to the lever 6 on the degree detecting device side. With the above configuration, the rotation of the throttle valve shaft is transmitted to the rotating body 7 via the lever 6. Brushes 8a and 8b are attached to the rotating body 7, and the brushes 8a and 8b
A certain output value is obtained by sliding on a and 1b, and the throttle valve opening is detected based on the output value. Reference numerals 2, 3, 4, and 5 denote connection terminals from the variable resistors, which form a circuit as shown in FIG. 3. Voltages 3a and 4a as shown in FIG. .

In the above structure, when two or more resistance patterns 1a, 1b having the same output voltage 3a, 4a are provided, when the output voltage 3a is momentarily interrupted (3a <Vmin), the other output voltage Since 4a is detected, erroneous detection due to instantaneous output interruption can be prevented.

[0013]

According to the present invention, it is possible to obtain a small throttle valve opening detector with high reliability of the output signal.

[Brief description of the drawings]

FIG. 1 is a diagram showing a main part of a throttle valve opening detection device according to an embodiment of the present invention.

FIG. 2 is a longitudinal sectional view of the throttle valve opening detector.

FIG. 3 is an electric circuit diagram of a throttle valve opening detection device according to an embodiment of the present invention.

FIG. 4 is an output characteristic diagram of the throttle opening detection device.

[Explanation of symbols]

1a, 1b: resistance pattern, 2: input terminal, 3: output terminal A, 4: output terminal B, 5: GND terminal, 6: lever,
7: rotating body, 8a, 8b: brush, 9: resistor substrate.

Claims (5)

[Claims] 1. A throttle valve opening detecting device for detecting an opening of a throttle valve for adjusting an amount of air drawn into an internal combustion engine, comprising a pair of rotary variable resistors. The rotary variable resistor has a pair of arc-shaped variable resistors provided on one substrate, a pair of arc-shaped input / output conductors, and input / output and ground terminals collectively arranged in one place of the substrate, A throttle valve opening detection device in which the ground terminal is one common ground terminal among the input / output and ground terminals. 2. A throttle valve opening detecting device for detecting an opening of a throttle valve for adjusting an amount of air sucked into an internal combustion engine, comprising a pair of rotary variable resistors. The rotary variable resistor has a pair of arc-shaped variable resistors provided on one substrate, a pair of arc-shaped input / output conductors, and input / output and ground terminals collectively arranged in one place of the substrate, A throttle valve opening detection device wherein an input terminal is one common input terminal among the input / output and ground terminals. 3. A throttle valve opening detecting device for detecting an opening of a throttle valve for adjusting an amount of air drawn into an internal combustion engine, comprising a pair of rotary variable resistors. The rotary variable resistor has a pair of arc-shaped variable resistors provided on one substrate, a pair of arc-shaped input / output conductors, and input / output and ground terminals collectively arranged in one place of the substrate, Among the input / output and ground terminals, the throttle terminal is a common ground terminal, and the input terminal is a common input terminal. 4. The throttle valve opening detection device according to claim 1, wherein an output terminal among the input / output and ground terminals is disposed between an input terminal and a ground terminal. Characteristic throttle opening detection device. 5. The throttle valve opening detecting device according to claim 1, wherein output voltages from the two output terminals have the same value. apparatus.