JPS58197434A - Switch mechanism of idle speed controller - Google Patents

Abstract

PURPOSE:To simplify a detecting switch mechanism, by moving a leaf spring shaped movable contact provided between two fixed contacts through a plunger of an idle speed controller controlling a throttle valve opening and detecting upper and lower limit positions. CONSTITUTION:Various operative conditions of an engine are detected and input to an electronic controller, and an idle speed controller 6 contains a plunger 15 linearly moving and controlling a throttle valve opening by a control signal from the electronic controller, then a fixed contact 10, leaf spring shaped fixed cntact 12 and a leaf spring shaped movable contact 14 located between these contacts 10, 12 are provided to the inside of the controller 6. If the plunger 15 positioned as illustrated in the drawing is moved in a direction B by the control signal, the contact 14 is detachably opened from the contact 10 through a pin 20 and the first signal is generated, if the plunger is further moved, the contact 14 is attached to the contact 12 and the second signal is generated, in consequence, two positions can be detected, and the generation of chattering is decreased by resilient absorption of the contact 12 of leaf spring shape.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention provides a switch mechanism of an idle rotation control device, that is, a throttle pulp position during idle rotation that is ensured to automatically maintain an optimum opening degree depending on the working/non-working state. The present invention relates to a switch mechanism of an idle rotation control device used to detect two positions, an upper limit and a lower limit, of shirring/shine within the device.

Generally, the carburetor of an internal combustion engine tends to be electronically controlled, and it is well known that in this case, parameters such as cooling water temperature, intake pipe negative pressure, and engine speed are taken into consideration. This will be explained with reference to FIG. 1, which is a conventional device. In Fig. 1, reference numeral 1 denotes an intake pipe, and inside thereof there is provided a throttle lever 3 that rotates clockwise together with a slot pulp 2, and is constantly operated by a spring 4 around a shaft 5. A force is applied in the direction of closing the valve 2. On the other hand, a no-run gear (not shown) is slidably provided in the idle rotation control device 6, and a rod 7 integrally formed with the inner gear protrudes outside, and its tip 7' is in contact with the throttle lever 3. This restricts the clockwise rotation of the slot and torque guide 3, and determines the idle rotation speed. In this case, the throttle valve 2 can be opened and closed freely by operating an accelerator (not shown) regardless of the above. In addition, parameters such as cooling water temperature, intake pipe negative pressure, and engine speed are inputted to the electronic control device 8, and a control signal is given to the motor 9 according to the calculation result of each of the parameters, which controls the idle speed. A silane gloss (not shown) in the control device 6 is slid. The rod 7 integrated with the silane gloss is moved in and out, and the resulting idle rotation speed is arbitrarily controlled each time according to each of the molameters. In this type of control device, it is necessary for control to detect the position of the moving rod based on a control signal from the electronic control device 8 and to feed this to the electronic control device 8. However, it is quite difficult to accurately detect the rod position within a limited space. -,,.

The present invention has been made to solve the above-mentioned problems, and it is an object of the present invention to provide a switch mechanism for an idle rotation control device that has an extremely simple configuration and is capable of proper operation.

In the present invention, we focused on a silan gloss that is located in the idle rotation control device and moves in a straight line in response to a control signal from an electronic control device, and provided two fixed contacts for the movable contact that is suppressed and moved by the silan gloss. , each of the two contacts is sequentially brought into contact with a movable contact to detect the two positions of the upper and lower limits of the rod.

Examples will be described below with reference to the drawings. FIG. 2 is an equivalent circuit of the switch mechanism according to the present invention, and FIG. 3 is a diagram showing the main part of an embodiment of the present invention.

In FIG. 2, 10 is a first fixed contact and is connected to a positive terminal 11. In FIG. Reference numeral 12 designates a second fixed contact having a leaf spring shape, and is connected to the positive terminal 13 as described above. Reference numeral 14 denotes a movable contact having the shape of a plate spring, and has two contact points 14' and 14''.One contact point 14' contacts the first fixed contact 10, and the other The contact point 14'' faces the second fixed contact 12. Note that the movable contact 14 is body grounded. Therefore, at all times, the first fixed contact lO and the movable contact 14 are in contact with each other and conductive.

Reference numeral 15 denotes a blanking wheel, which is indicated by the solid arrow A by the control signal from the electronic control circuit 8 as described above.

They are movable in the B direction. In addition, PLANTSYA-15
The contact surface is made of a non-conductor and is in contact with the movable contact 14 via a contact pin 20 which will be described later. Reference numeral 16 denotes an adjustment screw which contacts the second leaf spring-shaped fixed contact 12 and adjusts the distance between the contacts via a recess 17.

FIG. 3 is a specific configuration diagram of the contact mechanism, showing only the main parts. Reference numerals 10 to 17 in the figure correspond to those in FIG. Reference numeral 18 denotes a main body of the idle rotation control device, in which the above-mentioned silan gloss 16 is movably mounted. In addition, in the upper position (not shown) there is a
A rod integral with 5 is provided and abuts the end of the throttle lever. A contact pin 20 made of an insulating material such as nylon is brought into contact with the free end 14'' of the movable contact 14 having a leaf spring shape, so that the movement of the ground gloss is transmitted to the contact via the contact pin 20. 19 is a horizontal spring.

Next, the operation of the switch mechanism having the above configuration will be explained.

It is now at the stop position shown in Figure 3! When the lanzer 15 is moved, for example, in direction B (the direction in which the rod becomes shorter) in response to a control signal, the non-conducting contact surface of the lanzer 15 comes into contact with the end of the contact bottle 20 and presses it. However, until the contact pin 20 is contacted, the first fixed contact 10 and the contact point 14' of the movable contact 14 are in contact with each other. Accordingly, the contact is opened by the contact of the plunger 15, and at this time the conduction is broken and a first signal is generated. When the silanger 15 continues to move further, the contact point 14'' comes into contact with the second fixed contact 12 due to the pressed state of the movable contact 14, and at this time a second signal is generated. Contact point 1 between contact 10 and movable contact 14
4' and the first signal generated when the movable contact 1
It is possible to detect the rod position at two locations based on the second signal generated when the contact point 14" of the fourth contact point 14" contacts the second fixed contact 12.Moreover, when the movable contact leaves the first fixed contact, the rod position can be detected at two locations. , there is little risk of chattering because the movable contact leaves with a moving force (load) applied to it, and when the movable contact contacts the second fixed contact, the second
Due to the elastic absorption of the leaf spring of the fixed contact, chattering is less likely to occur.

As explained above, according to the present invention, the leaf spring-like movable contact is freely movable between the first fixed contact and the second leaf spring-like fixed contact, and the plate spring-like movable contact is normally provided with a leaf spring-like movable contact between the first fixed contact and the second leaf spring-like fixed contact. The spring-shaped movable contact is brought into contact, and the leaf-spring-shaped movable contact is pressed and opened in response to the movement of the spring, and the spring-shaped movable contact is released.
Since the contact is made to contact the second leaf spring-like fixed contact by continuous movement of the rod, the upper and lower limit rod positions can be detected at two locations with a simple configuration, and at the same time, a chattering-free switch mechanism for an idle rotation control device is provided. can do.

[Brief explanation of drawings]

FIG. 1 is an explanatory diagram of the operation of the idle rotation control device, FIG. 2 is an equivalent circuit of a switch mechanism of the idle rotation control device according to the present invention, and FIG. 3 is a diagram showing the main part of an embodiment of the present invention. ■... Intake pipe 2... Throttle valve 3... Throttle lever 4... Wing 5... Shaft 6... Idle rotation control device 7... Rod 7'... Rod end 8・
...Electronic control device 9...Motor 10...First
Fixed contact 11...Glass terminal 12...Second leaf spring-shaped fixed contact

Claims (1)

[Claims] In the switch mechanism of the idle rotation control device, which adjusts the rotation angle of the throttle lever through the idle rotation control device based on control signals from the electronic control device while taking into consideration various meters, there is a A movable contact having a leaf spring shape is forced to move by a blank that is inserted and slides in response to a control signal from the electronic control device, thereby separating it from the first fixed contact and fixing the second leaf spring shape. A switch mechanism for an idle rotation control device, characterized in that two positions, an upper limit and a lower limit, of plant gear movement are detected by sequentially making contact with a contact point.