JP5109173B2 - Engine operating time display device - Google Patents

Description

  The present invention relates to an operating time display device for engines such as mowers, chain saws, and vehicles.

A racing car or the like is provided with an engine operating time accumulator called an engine hour meter that integrates and displays the engine operating time. The engine operating time accumulator integrates the engine operating time in the operating time integrating means, and displays the integrated result on the display device. The engine operating time accumulator has great utility value for knowing the operating state of the engine.
Further, according to the engine operating time accumulator, the accumulated value of the measured engine operating time can be used as a guideline for the timing of performing maintenance, oil change, exhaust gas measurement, etc. of the engine.

  However, a conventional engine operating time accumulator is a dedicated measuring instrument for integrating the time that the engine has been operating, and displays the measurement results on a liquid crystal display or the like. In addition to being difficult to downsize (reduce), there is an inconvenience that it is expensive.

  The present invention has been made paying attention to the conventional problems as described above. By obtaining engine operating time information from the engine stop circuit, it is possible to accurately measure the engine operating time and to simplify the display means. Another object of the present invention is to obtain an engine operating time display device that can be configured at low cost.

  To achieve the above object, an engine operating time counting device according to the present invention includes a power generation coil that constitutes a power supply for an ignition device of an engine and a stop switch for misfire operation that grounds or short-circuits the induced voltage of the power generation coil. The engine operating time display device connected to the pulse detecting means for detecting the pulse induced by the rotation of the rotor having the magnet in the power generation coil, and the engine operating time based on the pulse sensing output by the pulse sensing means Engine operating time measuring means for measuring the output, and a lighting output means for outputting a lighting signal every time the engine operating time measured by the engine operating time measuring means reaches a set time, and lighting the light emitting diode for a predetermined time set by a timer; It is characterized by providing.

  With the above configuration, the engine operation time is measured by the power generation pulse obtained from the power generation coil, and the engine operation time measured for the worker or the driver within a certain time every set time is turned on or blinking the light emitting diode. Thus, it is possible to make an operator, a driver, etc. recognize that it is the timing of engine maintenance, engine oil replacement, exhaust gas measurement, and the like.

  In the engine operating time counting device according to the present invention, the lighting output means includes a timer for holding the light emitting diode on for a certain period of time, and a reset switch for resetting the timer.

  With the above-described configuration, even after an operator, a driver, or the like confirms the operating time of the engine by the display by the light emitting diode, it can be stopped by the reset of the timer by the switch.

  Further, the engine operating time counting device according to the present invention turns on the light emitting diode by a long press operation of a switch when instructing the display of the operating time, and presses the switch for a set number of times after the lighting. Confirm that the display is accepted by turning on the light-emitting diode a certain number of times, and then display the engine operating time according to the number of times the light-emitting diode is turned on for every 100 digits, 10 digits, and 1 digit. It is characterized by that.

  With the above-described configuration, the engine operating time is directly determined based on the number of times one light emitting diode is turned on at the same time while confirming the response to the special operation of the switch by turning on the light emitting diode. Can be recognized.

  According to the present invention, the engine operating time information can be accurately measured by obtaining the engine operating time information from the power generation coil constituting the engine ignition device, and the engine operating time display device can be simplified using the light emitting diode. And it can be configured at low cost.

Hereinafter, an engine operating time display device according to an embodiment of the present invention will be described in detail with reference to the drawings.
1 is a block diagram showing an engine stop circuit having an engine operating time display device according to an embodiment of the present invention, FIG. 2 is a block diagram showing an engine operating time display device in FIG. 1, and FIG. FIG. 4 is a timing chart showing the engine operation time display time and the switch input in the present invention, FIG. 4 is a timing chart showing the switch input for the engine operation time display and the lighting response display by the light emitting diode, and FIG. FIG. 6 is a timing chart showing an operation time display output displayed following the lighting response display by the light emitting diode shown in FIG. 4, and FIG. 6 is a timing chart showing a switch input at the end of the engine operation time display and a display output of the light emitting diode. .

  As shown in FIG. 1, the engine stop circuit includes a stop terminal 12 provided in the power generation coil 11 and a stop switch 13 connected to the stop terminal 12 by lead connection. The power generation coil 11 is wound around a core 14 and has a rotor with a magnet in the vicinity driven by the rotation of the engine. Accordingly, a voltage is induced in the power generation coil 11 by the rotation of the magnet, and the induced voltage is supplied to the ignition device of the engine at a controlled predetermined timing.

  On the other hand, the stop switch 13 can prevent the ignition energy from being supplied to the ignition device by grounding the voltage induced by the power generation coil 11 during the ON operation, and can quickly stop the engine.

  The stop switch 13 is installed in the vicinity of a grip portion that facilitates hand operation in a mower, a chain saw, or the like.

  A display device 15 is connected between the stop terminal 12 and the stop switch 13 of the engine stop circuit. The display device 15 includes a display control unit 16 and a display unit 17.

  Among these, the display control unit 16 is based on a pulse sensing unit 18 as shown in FIG. 2 that senses a pulse induced by the generator coil 11 due to rotation of a rotor having a magnet, and a pulse sensing output from the pulse sensing unit 18. Engine operating time measuring means 19 for measuring the engine operating time, and lighting output means 20 for outputting an engine operating time signal obtained by the engine operating time measuring means 19 as a lighting output are provided.

  On the other hand, the display unit 17 includes one light emitting diode. Further, the lighting output means 20 is provided with a reset switch 20a that can reset a timer for holding the lighting (driving) state of the light emitting diode 17a and stop it halfway.

  Next, the operation will be described. The display control unit 16 is connected in the middle of the engine ignition circuit including the power generation coil 11 and operates by directly receiving the induced voltage of the power generation coil 11. Therefore, the pulse sensing means 18 of the display control unit 16 notifies the engine operation. That is, a pulse generated during engine operation time is detected. This pulse is a rectangular wave pulse obtained by separating it from other noise pulses and subjected to waveform shaping processing.

  The engine operating time measuring means 19 comprises a microprocessor (CPU) and calculates the engine operating time by sensing the pulse. For example, each time the integrated value of the operating time reaches a set time, one light emission is generated. It functions to light up the diode 17a for a certain period of time.

  A memory 19a is connected to the engine operating time measuring means 19, and the integrated value data of the operating time can be stored, and the integrated value data can be read and displayed on the display unit 17 as necessary.

  The engine operating time measuring means 19 stores a program for executing the calculation and the like together with the set time and a fixed time. Accordingly, the switch 21 is turned on when the operator or driver wants to know the operating time of the engine during operation or transportation of the mower or vehicle.

  Thus, under the control of the CPU, the pulse sensing means 18 senses a rectangular wave pulse obtained by shaping the output pulse of the power generation coil 11. Based on the detected pulse, the engine operating time measuring means 19 integrates the engine operating time, and this integrated value is sequentially recorded in the memory 19a and input to the lighting output means 20.

  The lighting output means 20 turns on the light emitting diode 17a only for 3 hours, for example, every time B, for example, every 100 hours set by the timer 20b. FIG. 3 (a) shows this situation. By turning on the light emitting diodes 17a at the timing as shown in FIG. 3A, the timing or instructions for engine maintenance, oil change, exhaust gas measurement, etc. can be notified to the operator and the driver.

  In the above case, the light emitting diode 17a continues to be lit within time B even after the operator, driver, or the like confirms that it is the timing of engine maintenance or the like. For this reason, this lighting state may be bothersome. Therefore, after confirming the timing of such engine maintenance, the operator can turn off the light by turning on the reset switch 20a.

  FIG. 3B shows the on state of the reset switch 20a. When the reset switch 20a is on, the lighting state of the light emitting diode 17a is immediately reset to the off state, and the lighting time is shown in FIG. 3C. Thus, B is shortened to B1.

  In the above-described embodiment, since the light emitting diode 17a is lit within 3 hours every 100 hours as described above, the operator or driver is informed that 100 hours have passed again after the previous engine operating time (100 hours). Can be recognized. As shown in FIG. 3B, the time B is not changed by a switch operation in a period other than when the light emitting diode 17a is turned on.

  On the other hand, when it is desired to know the integrated value of the engine operating time, the switch 21 is pressed for a long time, that is, the switch 21 is turned on for a time C or more as shown in FIG. In response to the long press, a response display is performed by lighting for time D as shown in FIG.

  Subsequently, as shown in FIG. 4A, the operator and the driver short-press the switch 21 three times. If the short press is performed correctly, the light emitting diode 17a is turned on (flashing) three times as shown in FIG. To the driver or driver.

  Following the response, the engine operating time measuring means 19 reads the integrated value of the engine operating time so far from the memory 19a and transfers it from the ignition output means 20 to one light emitting diode 17a. In this case, the engine operating time measuring means 19 determines the engine operating time for every 100 digits, 10 digits, 1 digit, for example, based on the number of times (number of pulses) of the light emitting diodes 17a obtained within a certain time. The driver can be made aware.

  FIGS. 5A and 5B show display examples of the operating time by the diode 17a that the engine operating time measuring means 19 implements through the lighting output means 20. FIG. In FIG. 5 (a), the operating time of 234 hours is the first 100-digit number “2” when the light-emitting diode 17a is lit twice, and the next 10 digits by being lit three times at a predetermined time. And the next one-digit number “4” by lighting four times at a predetermined time.

  Similarly, as shown in FIG. 5 (b), the operating time of 30 hours is represented by the first 100-digit number “0”, the predetermined 10-hour number “3”, and the predetermined time. And can be represented by the next one-digit number “0”. Here, in order to differentiate between “0” of 100 digits and 1 digit and zero level (light extinction) at the time of no signal, “0” sets a long output pulse width.

  As described above, the numerical value (operation time) of each digit (including three or more digits) is displayed by one light emitting diode 17a by repeatedly flashing (ON / OFF) the light emitting diode 17a at regular intervals. Can do.

  When it is desired to reset the operation time, for example, an operator, a driver, or the like presses the switch 21 for three times as shown in FIG. As a result, the light emitting diode 17a is continuously turned on during the time E as shown in FIG. Therefore, an operator, a driver or the like presses the switch 21 for 5 times within the time E.

  As a result, the light emitting diode 17a blinks five times as shown in FIG. 6A, and the display of the operation time is reset. The reason why the processing is complicated is to prevent the operation time from being easily reset.

  In the above-described embodiment, the pulse that is induced by the rotation of the rotor having the magnet in the power generation coil 11 is detected by the pulse detection means 18, and the engine operation time is determined based on the pulse detection output from the pulse detection means 18. The light emitting diode 17a is turned on within a predetermined time set by the timer every time the engine operating time measured by the measuring means 19 and measured by the engine operating time measuring means 19 reaches the set time.

  Therefore, the engine operating time is obtained from the number of power generation pulses obtained from the power generating coil 11, and when the set time comes, the engine operating time obtained for the operator, the driver, etc. within a certain time is used as the light emitting diode 17a. It is notified by lighting, and it is possible to make an operator or a driver recognize that it is the timing of engine maintenance, engine oil replacement, exhaust gas measurement, and the like. Further, by configuring the display unit 17 with a single light emitting diode 17a without using an expensive liquid crystal panel or the like, the operating time display device can be configured simply and inexpensively.

  INDUSTRIAL APPLICABILITY The present invention has an effect that the display means can be configured simply and inexpensively using a single light emitting diode, and is useful for an operating time display device for engines such as mowers, chain saws, and vehicles.

It is a block diagram which shows the engine stop circuit provided with the operating time display apparatus of the engine by embodiment of this invention. It is a block diagram which shows the operating time display apparatus of the engine in FIG. It is a timing chart which shows the display time and switch input of the engine operating time in this invention. It is a timing chart which shows the switch input for engine operation time display in this invention, and the lighting response display by a light emitting diode. It is a timing chart which shows the working time display output displayed following the lighting response display by the light emitting diode shown in FIG. It is a timing chart which shows the switch input at the time of the end of engine operation time display, and the display output of a light emitting diode.

Explanation of symbols

DESCRIPTION OF SYMBOLS 11 Generating coil 12 Stop terminal 13 Stop switch 14 Core 15 Display apparatus 16 Display control part 17 Display part 17a Light emitting diode 18 Pulse detection means 19 Engine operation time measurement means 19a Memory 20 Lighting output means 20a Reset switch 21 Switch 20b Timer

Claims (3)

An engine operating time display device connected between a power generation coil that constitutes a power supply for an ignition device of an engine and a stop switch for misfire operation that grounds or short-circuits an induced voltage of the power generation coil, the power generation coil comprising: Measured by a pulse sensing means for sensing a pulse induced by rotation of a rotor having a magnet, an engine operating time measuring means for measuring an engine operating time based on a pulse detection output by the pulse sensing means, and an engine operating time measuring means. And a lighting output means for outputting a lighting signal each time the engine operating time reaches a set time and lighting the light emitting diode for a predetermined time set by a timer. 2. The engine operating time display device according to claim 1, wherein the lighting output means includes a timer that keeps the light emitting diode lit for a certain period of time, and a reset switch that resets the timer. When instructing the display of the operation time, the light emitting diode is turned on by a long press operation of the switch, and after the lighting, the light emitting diode is turned on for the short press times by pressing the switch for a set number of times. 2. The engine according to claim 1, wherein the engine operating time is displayed by the number of times of lighting of one light-emitting diode every 100 digits, 10 digits, and 1 digit after confirming acceptance and lighting for this confirmation. Operating time display device.

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