KR19990006654U - Tension display device for vehicle engine timing belt - Google Patents

Abstract

The present invention provides a tension display apparatus for a vehicle engine timing belt that detects a variable tension state of a timing belt of a vehicle engine through a voltage difference by a piezoelectric element and enables differential display and warning through a plurality of display elements. .

Accordingly, the present invention provides an engine timing belt tension detecting device for a vehicle having an auto tensioner 4 which is movably supported by a bracket 6 and detects a tension deformation of the timing belt 2 of the engine. Tension deformation of the timing belt 2 is detected by the auto tensioner 4 on the other end of the bracket 6, which is installed on the movement path by the auto tensioner 4, and the power B + is applied at one end thereof. From the piezoelectric element 8 for outputting a voltage value varied according to the differential comparator 10 and the differential comparator 10 for differentially comparing the variable voltage value from the piezoelectric element 8 with a reference voltage (Vref) Differently applying the control signal from the ECU 12 and the ECU 12 which variably generates a control signal for differentially warning the degree of tension variation of the timing belt 2 in response to the output signal state. Multiple switching operation It is connected to the switching elements 14, 16, 18 and the plurality of switching elements 14, 16, 18, respectively, and according to the switching operation of each switching element 14, 16, 18, the timing belt ( It is characterized in that it comprises a plurality of light emitting elements 20, 22, 24 which are differentially lit to indicate the tension degree of 2).

Description

Tension display device for vehicle engine timing belt

The present invention relates to a tension display device for an engine timing belt for a vehicle, and more particularly, a tension display for an engine timing belt for a vehicle for visually identifying a tension state of a timing belt for transmitting power from an internal combustion engine for a vehicle. Relates to a device.

Currently, a vehicle that is generally traveling is equipped with an internal combustion engine as its main power source, and transmits power obtained by starting by the internal combustion engine to other drive sources through a timing belt.

In the case of such a timing belt of the engine, it is desirable to determine whether or not power from the engine is normally transmitted according to the tension state of the belt, so that the optimum tension state of the timing belt is always maintained. Recently, an auto-tensioner that is in contact with a predetermined portion of the belt is attached so that a warning display can be made when the tension is out of a predetermined range or more before the belt replacement cycle.

However, in the case of the warning display function of the tension abnormality state by the auto tensioner of the timing belt for such an engine, the limit switch constituted by the auto tensioner and the switching contact is connected, and the single warning display is provided by the switching connection of the limit switch. Since a single warning display is made, there is a disadvantage that the driver cannot easily grasp the tension variable degree of the timing belt.

Accordingly, the present invention has been made in view of the above circumstances, and detects a variable tension state with respect to a timing belt of a vehicle engine through a voltage difference caused by a piezoelectric element so that the display can be differentially displayed through a plurality of display elements. An object of the present invention is to provide a tension display device for a vehicle engine timing belt.

According to the tension display device for a vehicle engine timing belt according to the present invention for achieving the above object, for a vehicle engine having an auto-tensioner which is supported by a bracket so as to be movable and detects a tension deformation of the timing belt of the engine. In the timing belt tension detection device, the bracket is mounted on the movement path by the auto tensioner, and the power is supplied to one end thereof, and the voltage value is changed to the other end according to the detection of the tension deformation of the timing belt by the auto tensioner. A piezoelectric element, a differential comparator for differentially comparing the variable voltage value from the piezoelectric element, and a control signal for differentially warning the degree of tension variation of the timing belt in response to an output signal state from the differential comparator. Differently generated ECU and variable control signals from the ECU A plurality of switching elements that are subjected to switching operation and the plurality of switching elements, respectively, and are connected to each of the plurality of switching elements, the plurality of light emitting elements that are differently lit to indicate the tension degree of the timing belt according to the switching operation of each switching element Provided is a tension display device for a vehicle engine timing belt configured to include:

According to the present invention configured as described above, a piezoelectric element is provided on the side of the auto tensioner for detecting the tension state with respect to the timing belt for the engine, and a plurality of voltages are provided by the variable voltage value corresponding to the degree of tension deformation of the piezoelectric element. The light emitting device can be differentially lit.

1 is a circuit diagram illustrating a tension display device of a vehicle engine timing belt according to the present invention.

Explanation of symbols on the main parts of the drawings

2: timing belt, 4: auto tensioner,

6: bracket, 8: piezoelectric element,

10: differential comparator, 12: ECU,

14, 16, 18: drive transistor, 20, 22, 24: light emitting element.

Hereinafter, the present invention configured as described above will be described in detail with reference to the accompanying drawings.

That is, Figure 1 is a circuit diagram showing a tension display device of the vehicle engine timing belt according to the present invention, the reference numeral 4 in the device of the present invention transfers the power generated by the driving according to the start of the engine to other drive sources The auto tensioner is installed in contact with the timing belt 2 to detect the tension deformation state of the timing belt 2, and 6 indicates that the auto tensioner 4 causes the tension deformation of the timing belt 2. According to the present invention, the bracket is movably supported.

Further, reference numeral 8 is attached to the movement path of the bracket 6 supporting the auto tensioner 4, and the tension deformation degree of the timing belt 2 in the state where the power supply B + is applied to one end thereof. And a piezoelectric element that is deformed in correspondence to the variable voltage value, and receives a variable voltage value from the piezoelectric element 8 through its non-inverting terminal (+), and applies it through its inverting terminal (-). And a differential comparator for differentially comparing the predetermined reference voltage Vref to generate a variable output signal.

In addition, reference numeral 12 denotes a control signal (i.e., first, second and third control signals) indicating the degree of tension deformation of the timing belt 2 by receiving the variable output signal from the differential comparator 10. ) Represents an ECU (Electronic Control Unit) that differentially occurs.

Reference numerals 14, 16, and 18 denote first, second, and third control signals generated differently from the ECU 12, the base ends of which are connected to the control signal output ends of the ECU 12, respectively. The first, second and third switching elements made of, for example, NPN transistors that are applied and conducting are shown.

Further, reference numerals 20, 22, and 24 are connected to emitter ends of the first, second, and third switching elements 14, 16, 18, respectively, and according to the conduction of each switching element 14, 16, 18, respectively. The first, second, and third light emitting elements for illuminating to visually confirm the degree of tension deformation of the timing belt 2 are shown.

Next, the operation of the present invention made as described above will be described in detail with reference to FIG. 1.

First, when the timing belt 2 connecting the engine and other driving sources is rotated while the vehicle is started and the engine is driven, the auto tensioner for detecting the tension deformation state of the timing belt 2 ( The piezoelectric element 8 provided on the bracket 6 side of 4) is deformed in accordance with the tension deformation of the belt 2 and generates a variable voltage value.

Accordingly, the differential comparator 10 receives the variable voltage value from the piezoelectric element 8 through its non-inverting terminal (+) and differentially compares it with the reference voltage Vref applied to the inverting terminal (−). A variable output signal is generated, and the ECU 12 generates a differential control signal corresponding to a variable state of the output signal from the differential comparator 10. The tension deformation of the timing belt 2 is performed. If the degree is small, only the first control signal is generated so that only the first light emitting device 20 is turned on. However, if the tension degree of the timing belt 2 is large, the first, second and second light emitting devices 20 are generated. And 22 and 24 generate first, second and third control signals that control the lighting of all of them.

At this time, the first, second, and third switching elements 14, 16, and 18 are supplied with differential control signals from the ECU 12 to their base ends, respectively, to be conducted. The two light emitting elements 20, 22 and 24 are turned on differentially.

According to the present invention made as described above, the degree of deformation of the timing belt can be specifically identified by the driver so as to discriminatively detect the degree of tension deformation with respect to the timing belt of the vehicle engine and to display it visually. It has the advantage that it is.

Claims (1)

In the engine timing belt tension detection device for a vehicle having an auto tensioner (4) which is movably supported by the bracket (6) and detects the tension deformation of the engine's timing belt (2), Tension deformation of the timing belt 2 is detected by the auto tensioner 4 on the other end of the bracket 6, which is installed on the movement path by the auto tensioner 4, and the power B + is applied at one end thereof. A piezoelectric element 8 for outputting a voltage value varied according to: A differential comparator 10 for differentially comparing the variable voltage value from the piezoelectric element 8 with a reference voltage Vref; ECU 12 for variably generating a control signal for differentially warning the degree of tension variation of said timing belt 2 in response to the output signal state from said differential comparator 10, A plurality of switching elements 14, 16 and 18 for switching operation by differentially applying the variable control signals from the ECU 12, and Are connected to the plurality of switching elements 14, 16 and 18, respectively, and differentially to indicate the degree of tension of the timing belt 2 according to the switching operation of each of the switching elements 14, 16 and 18. A tension display device for an engine timing belt for a vehicle, comprising a plurality of light emitting elements 20, 22, and 24 that are turned on.