JP2556973Y2 - Total time meter used for internal combustion engines - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial application field] The present invention relates to an integrated use time meter of an internal combustion engine which measures and displays the integrated use time of an internal combustion engine.

[Conventional technology]

The internal usage time meter of the internal combustion engine is mounted on various devices equipped with an internal combustion engine such as a chain saw and a mower, and is used to know the internal usage time of the internal combustion engine as a guide for maintenance inspection and lease calculation of the device. What is used.

Conventionally, pulse induction means for electromagnetically inducing an ignition pulse of the internal combustion engine, signal processing means for calculating the integrated use time of the internal combustion engine based on the electromagnetically induced pulse, and calculation results of the signal processing means There has been provided an integrated use time meter for an internal combustion engine having a display means for displaying (for example, see Japanese Utility Model Laid-Open No. 63-118344).

However, in such a conventional integrated time meter, the pulse inducing means, the signal processing means, and the display means are integrally formed, and all of these means have to be mounted on an internal combustion engine mounted device such as a chain saw. Was.

For this reason, the size of the internal combustion engine mounted device has been increased by the entirety of each of the above means, and the weight thereof has also been increased. Further, when trying to know the accumulated use time of the internal combustion engine of a plurality of internal combustion engine mounted devices, it is necessary to mount all of the respective means on each device, and a part of each of the respective means is required. Since sharing was not possible, cost up was avoided.

[Problems to be solved by the invention]

The present invention has been made in view of the above circumstances, and it is possible to reduce the size and weight of an internal combustion engine mounted device, and to try to know the cumulative operating time of the internal combustion engine of a plurality of internal combustion engine mounted devices. An object of the present invention is to provide an integrated use time meter for an internal combustion engine which can be used at a low cost because some components can be shared.

[Means for solving the problem]

In order to solve the above problems, the present invention provides a pulse inducing means for electromagnetically inducing an ignition pulse of an internal combustion engine, a signal processing means for calculating and storing a cumulative use time of the internal combustion engine based on the electromagnetically induced pulse, A display unit for displaying an operation result of the signal processing means, wherein the display means is provided separately from the signal processing means, and the display means is electrically connected and disconnected therebetween. In addition to being freely configured, the calculation result stored in the signal processing means at the time of electrical connection can be called out to the display means.

[Action]

According to the present invention, the display means is formed separately from the signal processing means, and the display means is electrically connected and detachable therebetween, so that only the pulse inducing means and the signal processing means are used in an internal combustion engine such as a chain saw. It can be mounted on a mounting device.

Usually, the display means is separated and stored separately. In this state, the ignition pulse is electromagnetically induced by the pulse induction means, and the accumulated use time of the internal combustion engine is calculated and stored by the signal processing means. However, since the display means is separated, the calculation result is not displayed. However, since the accumulated use time is used as a guide for maintenance and inspection, lease charge calculation, and the like, it is not necessary to know during use of the internal combustion engine mounted device, and no inconvenience occurs.

On the other hand, when the user wants to know the accumulated use time of the internal combustion engine of the internal combustion engine mounted device, the display means is electrically connected to the signal processing means. Thereby, the calculation result by the signal processing means is displayed on the display means, so that the accumulated use time of the internal combustion engine can be known.

Thus, according to the present invention, only the pulse inducing means and the signal processing means need to be mounted on the internal combustion engine mounted device,
Since the display means does not need to be mounted, the size and weight of the internal combustion engine mounted device can be reduced by the amount of the display means as compared with the above-described conventional use time counter.

Further, according to the present invention, as described above, only the pulse inducing means and the signal processing means are mounted on the internal combustion engine mounted device, and the display means is usually separated and stored separately. Since it is only necessary to electrically connect to the signal processing means only when it is necessary to know the cumulative use time of the engine, when trying to know the cumulative use time of the internal combustion engine of a plurality of internal combustion engine mounted devices, One display means may be prepared by mounting the pulse guiding means and the signal processing means, and the display means can be shared, and the cost is lower than that of the above-mentioned conventional integrated time meter.

〔Example〕

 Hereinafter, an embodiment of the present invention will be described with reference to the drawings.

FIG. 1 is a partially cutaway perspective view showing an integrated use time meter of an internal combustion engine according to an embodiment of the present invention, and FIG. 2 is an electric circuit diagram thereof.

In these drawings, (1) is a pulse inducing means for electromagnetically inducing an ignition pulse of an internal combustion engine, and is constituted by an antenna lead (2) and an induction coil (3). The antenna lead (2) is made of a copper wire or the like, one end of which is fixed near the induction coil (3) inside the housing (4) and is one of an inductive coupling circuit inductively coupled to the induction coil (3). The other end is fixed to the conductive wire by winding it around the conductive wire (not shown) of the ignition plug of the internal combustion engine or using a conductive connector such as an alligator clip. Therefore, an electromagnetic wave corresponding to the ignition pulse contained in the high voltage flowing through the conductor is guided to the induction coil (3) via the antenna lead (2), and is converted into a current by the induction coil (3). And eventually an induction coil (3)
From the pulse signal corresponding to the ignition pulse of the internal combustion engine. Note that the pulse inducing means (1) is not limited to the above configuration as long as it can electromagnetically induce the ignition pulse of the internal combustion engine.

In FIG. 2, reference numeral (5) denotes a signal processing means for calculating an integrated operating time of the internal combustion engine based on the pulse electromagnetically induced by the pulse inducing means (1), and a detection diode (6). (7) a capacitor (8) for absorbing noise, a microcomputer (9), and a crystal unit (1) for a system clock of the microcomputer (9).
0), a capacitor (11), and a battery (12).

The pulse signal obtained from the induction coil (3) is subjected to waveform processing by the diodes (6) and (7) and the capacitor (8), and then input to the microcomputer (9). Then, the micro computer (9) determines whether or not the pulse signal is obtained during each unit time (for example, 0.5 seconds), and counts the number of times that the pulse signal is determined to be obtained, The display data corresponding to the count value is output as an electric signal as a cumulative use time of the internal combustion engine as a calculation result. Since the ignition pulse of the internal combustion engine is generated only when the internal combustion engine is being used (operated), a value obtained by multiplying the count value and the unit time is an integrated use time of the internal combustion engine. Corresponds to the cumulative use time of the internal combustion engine.

The configuration of the signal processing means (5) is not limited to the illustrated example.

The signal processing means (5) is housed in the housing (4) together with the induction coil (3).

Further, in the drawing, (13) is a display means for displaying the calculation result of the signal processing means (5), for example, a liquid crystal display is used and accommodated in a housing (14) separate from the housing (4). And is separate from the signal processing means (5).

Then, the signal processing means (5) and the display means (1
The signal processing means (5) can be electrically connected to and separated from the signal processing means (3), and the operation result stored in the signal processing means (5) can be called out to the display means at the time of electrical connection. That is, in the case of the embodiment shown in the drawings, the cable (1) wired to the display means (13) and led out of the housing (14) is used.
A connector (16) is provided at the tip of 5), and a through-hole (18) matching the terminal pin (17) of the connector (16) is provided on a printed circuit board (20) on which the microcomputer (9) and the like are mounted. It is formed and its part is exposed from the housing (4). The through hole (18) is connected to an output terminal of the micro computer (9). Therefore, the terminal pin (17) of the connector (16)
Is inserted into the through-hole (18), the signal processing means (5) and the display means (13) are electrically connected, and the operation result stored in the signal processing means (5) is displayed on the display. Called by means (13), said connector (16)
Is removed to separate them. The means for electrically connecting and separating the signal processing means (5) and the display means (13) is not limited to the illustrated example.

In the case of the embodiment shown in the drawings, the microcomputer (9) outputs the display data when the pulse signal is being input, and the display data is output after a lapse of a predetermined time after the input is stopped. Since a program is set so that data is not output, a display call switch (19) is provided on the housing (14), and when the display call switch (19) is pressed when the connector (16) is connected, the micro call switch is turned on. A signal similar to the pulse signal is input to the computer (9), the display data is output from the micro computer (9), and the accumulated use time of the internal combustion engine is displayed on the display means (13). .

Alternatively, the display data may be output from the micro computer (9) only when the display call switch (19) is pressed when the connector (16) is connected. Also, the display data can be always output from the micro computer (9), in which case the display call switch (19) is unnecessary.

[Effect of the invention]

According to the present invention, only the pulse inducing means and the signal processing means need to be mounted on the internal combustion engine mounted device, and the display means does not need to be mounted, so that the size and weight of the internal combustion engine mounted device can be reduced. The effect is obtained.

In addition, since it is possible to share the display means when it is desired to know the accumulated use times of the internal combustion engines of a plurality of internal combustion engine mounted devices, only one display means is required.
The effect of being inexpensive is obtained.

[Brief description of the drawings]

FIG. 1 is a partially cutaway perspective view showing an integrated use time meter of an internal combustion engine according to an embodiment of the present invention, and FIG. 2 is an electric circuit diagram thereof. (1) ... pulse induction means, (5) ... signal processing means,
(13) Display means.

Continuation of the front page (56) References JP-A-61-83915 (JP, A) JP-A-63-118344 (JP, U)

Claims (1)

(57) [Scope of request for utility model registration] 1. Pulse induction means for electromagnetically inducing an ignition pulse of an internal combustion engine, signal processing means for calculating and storing an accumulated use time of the internal combustion engine based on the electromagnetically induced pulse,
In an integrated use time meter for an internal combustion engine comprising a display means for displaying the operation result of the signal processing means, the display means is provided separately from the signal processing means, and the connection therebetween is electrically connected and disconnected. An integrated time meter for use in an internal combustion engine, which is freely configured and configured so that a calculation result stored in the signal processing means at the time of electrical connection can be called out to the display means.