JPS5843656Y2 - Air cleaner clogging indicator for internal combustion engines - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a clogging display device for an air cleaner for an internal combustion engine, and more specifically, it electrically indicates the clogging of an air cleaner using a display element such as a buzzer or a lamp. For internal combustion engines, the display element can be monitored from the driver's seat, and once it has been activated, the display element continues to display after replacing the air cleaner element or cleaning it, and then resetting the clogging indicator. This is an air cleaner clogging indicator.

The conventionally used clogging display device is installed between the member that connects the air cleaner body and the carburetor.
As the clogging of the air cleaner becomes severe, the negative pressure generated by the suction action of the carburetor increases, which is used to mechanically display a warning plate with a color attached inside the indicator of the clogging indicator. Some were used to convert the mechanical display into an electrical display to issue a warning.

However, the electrical display method utilizes the negative pressure of the air sucked into the carburetor to activate the device and display a warning.When the engine is rotating at high speeds, that is, when driving at high speeds, the air cleaner element is If there is a clog, it will be displayed, but when the engine is idling or running at low speeds, the amount of air sucked by the carburetor is small, so the negative pressure applied to the clog indicator is small, so it will not be displayed at high speeds. Sometimes I forgot to replace or clean the air cleaner element even after the alarm had been canceled.

This invention was created in view of the above-mentioned circumstances,
The purpose is to electrically display clogging of the air cleaner using front elements such as buzzers and lamps.
For internal combustion engines, it is possible to monitor from a remote location, i.e. from the driver's seat, and once the display element has been activated, it continues to display on the housing that resets the clogging indicator after replacing or cleaning the air cleaner element. An object of the present invention is to provide a clogging display device for an air cleaner.

The present invention will be described in detail below based on the attached drawings.

FIG. 1 is a sectional view showing an embodiment of a clogging indicator for an internal combustion engine according to the present invention, and FIG. 2 is a sectional view showing the same operating state.

The diaphragm 2 provided in the center of the housing 1
is airtightly separated into a first chamber 5 and a second chamber 6, and a first spring 3 that presses the diaphragm 2 is provided inside the first chamber 5.
is fitted through the spring receiver 4.

The peripheral edge 2a of the diaphragm 2 is connected to a step 8 provided on the inner circumferential wall 7 of the first chamber 5, and a shoulder 10 of the lid 9 is screwed to the opening of the first chamber 5. The lid 9 is clamped and airtightly mounted, and the lid 9 has a communication hole 14 communicating with a member connecting the air cleaner and the carburetor.

On the other hand, the second chamber 6 is provided with a switch mechanism 15 and its return mechanism 16.

The switch mechanism 15 has a pin 18 loosely fitted into the guide tube 17, the proximal end 18a of which is attached to the diaphragm 2 provided in the first chamber 5, and the tip 18b of the pin 18 attached to the diaphragm 2 provided in the second chamber 6. The movable piece 20 is slidably attached to the base 19 and can be inserted into and locked into the locking hole 21 of the movable piece 20.

As is clear from FIG. 3, the movable piece 20 slidably attached to the base 19 has elongated holes 22a and 22b drilled in the plan view 11, and a guide pin 2 provided on the base 19.
3a, 23b and a second spring 26 provided between the movable piece 20 and the base 19, the movable piece 20 can slide in one direction perpendicular to the axial direction of the pin 18. A movable contact 24 is provided at one end of the bent portion 20a in the moving direction, and is capable of contacting a fixed contact 25 provided in the second chamber 6 of the housing 1.

The movable contact 24 and the fixed contact 25 are electrically connected to a display element attached to the driver's seat via a lead wire 30.

The return mechanism 16 also includes a curved portion 20 at the other end of the movable piece 20.
It consists of a return button 28 having a tip inclined portion 2γ facing b and a third spring 29, and the return button 28 is
9, the tip inclined portion 27 and the curved portion 20b of the movable piece 20 come into contact with each other, allowing the movable piece 20 to slide and return to its original position.

FIG. 4 is a circuit diagram of a display device according to the present invention, with reference numeral 1
2 is a battery, and 13 is a display element.

The thus constructed air cleaner clogging indicator for an internal combustion engine operates as follows.

This device is attached to a connecting member that connects the air cleaner body and the carburetor.

By starting the engine, the air filtered by the air cleaner is drawn into the carburetor through the connecting member, so that negative pressure is also applied to the first chamber 5 of the device.

When the engine is idle or running at low speed, the engine speed is low and the amount of air sucked in is small, so the negative pressure applied to the diaphragm 2 inside the housing 1 is small, but as the engine rotates at high speed, the negative pressure applied to the diaphragm 2 is small. The pressure is increasing.

If the air cleaner element is heavily clogged with dust, etc., the negative pressure applied to the diaphragm 2 becomes even greater, and the diaphragm 2 eventually deforms against the elastic force of the first spring 3. I will do it.

At this time, the pin 18 whose base end 18a is fixed to the diaphragm 2 is pulled by the diaphragm 2 as shown in FIG. The movable piece 20 of the switch mechanism 15 is disengaged from the locking hole 21, and the movable piece 20 has a long hole 22a formed in its flat surface 11.

22b and a guide pin 23a provided on the base 19.

23b and the second spring 26, the sliding contact 24 and the fixed contact 25 are electrically connected in a direction perpendicular to the axial direction of the pin 18.

Once the display device is activated in this way, it will not return to normal even if the engine speed is reduced to low speed.

That is, once the alarm device has been displayed, after cleaning or replacing the air cleaner element, press the return button 28, bring the inclined part 27 at the tip of the return button 28 into contact with the curved part 20b of the movable piece 20, and then By pressing the return button 28, the movable piece 20 is slid against the second spring 26, and the tip 18b of the pin 18 and the locking hole 2 of the movable piece 20 are
1, the original state is restored.

Since the air cleaner clogging display device for an internal combustion engine according to the present invention has the above-described configuration, it is possible to monitor the air cleaner clogging from the driver's seat by electrically displaying the air cleaner clogging display. Once activated, display elements such as buzzers and lamps will continue to display even when the engine rotates at low speeds, so you can avoid forgetting to clean or replace the air cleaner element.

[Brief Description of the Drawings] Fig. 1 is a sectional view showing one embodiment of the display device according to the present invention, Fig. 2 is a sectional view showing the same operating state, and Fig. 3 is a partially cutaway oblique view of the switch mechanism. The parent diagram, FIG. 4, is an electrical circuit diagram of the display device according to the present invention. DESCRIPTION OF SYMBOLS 1... Housing, 2... Diaphragm, 3... First spring, 5... First chamber, 6... Second chamber, 13...
- Display element, 14... Communication hole, 15... Switch mechanism, 16... Switch return mechanism, 17... Guide tube, 18... Pin, 18a... Base end of pin, 18b.
... Pin tip, 20... Movable piece, 20a... Bent part of movable piece, 20b... Curved part of movable piece, 21...
Locking hole, 24... Movable contact, 25... Fixed contact, 2
6... Second spring, 27... Inclination ~ 28...
Return button.

Claims (1)

[Scope of utility model registration request] A diaphragm installed in the center airtightly separates the housing into a first chamber equipped with an air cleaner communication hole and a second chamber equipped with a switch mechanism and its return mechanism. Fitting a first spring that presses the diaphragm,
A pin is loosely fitted into a guide tube provided in a second chamber and its base end is attached to the diaphragm, and the switch mechanism is actuated in response to the retraction operation of the pin based on the deformation of the diaphragm, thereby causing the display element to be activated. The switch mechanism includes a movable piece that is slidable in one direction perpendicular to the axial direction of the pin and has a locking hole through which the tip of the pin can be inserted and locked, and a second chamber. A movable contact is provided on the bent portion of one end of the movable piece so as to face the fixed contact, and the tip of the pin penetrates into the locking hole and is positioned away from the fixed contact when locking, and the movable contact is connected to the fixed contact. and a second spring that applies a resilient force to the movable piece so as to bring it into contact with the switch return button. An air compressor for an internal combustion engine in which the inclined tip of the button comes into contact with the curved part of the movable piece, causing the movable piece to slide and return to its original position, so that the movable contact is separated from the fixed contact. Cleaner clogging indicator.