JPS596478A - Air flow rate regulating valve - Google Patents

Abstract

PURPOSE:To prevent deformation of each retainer frame during assembly and tightening, by independently installing a retainer frame for supporting a plunger and a retainer frame for supporting a piston rod to a solenoid side and a valve body side, respectively. CONSTITUTION:Retainer frames 1h and 1i are independently mounted to a solenoid 1 and a valve body 3, respectively, and one each of a plunger 1e and a piston rod 6 is attached to the retainer frames 1h and 1i, respectively. Even if a tightening force is one-sided when the solenoid 1 and the valve body 3 are integrally joined by means of a screw 8, the retainer frames 1h and 1i are prevented from bending and this enables the plunger 1e and the piston rod 6 to smoothly slide inside a rod holder 1b.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an air flow rate regulating valve for preventing fluctuations in the rotational speed of an internal combustion engine when it is idling, and for keeping the idle rotational speed constant.

In an internal combustion engine, there is a close correlation between the idle speed and the amount of intake air, and generally speaking, increasing the amount of intake air increases the idle speed, and decreasing the amount of intake air causes the idle speed to decrease. For this reason, internal combustion engines are equipped with an air flow rate regulating valve, and when the idle speed exceeds a predetermined value, the air flow rate regulating valve reduces the amount of intake air to lower the idle speed, and the idle speed increases. Next time it becomes less than the predetermined value, increase the amount of intake air with the air flow rate adjustment valve] 7. Idle rotation speed? It is supposed to be raised.

By the way, as shown in FIG. 1, the conventional air flow rate regulating valve has one end connected to the atmosphere through a solenoid 1, a valve 2 which is driven by the solenoid 1 in an ex-slide manner, and a slide VC of the pulp 2. A pulp body 3i is provided in which the flow cross-sectional area between the atmospheric passage 3α and the air passage 3c whose one end side is connected to the intake manifold is controlled. Based on signals such as the temperature of the valve 2, the solenoid 1vi is operated to slide the pulp 2, and the slope 2α of the valve 2 controls the flow cross-sectional area of the air passage 3α. The amount of intake air is adjusted depending on the idle speed. In the figure, 1α, 1b, 1c*1 d, 1
#, 1/, 1g is the casing of solenoid 1, solenoid coil. bobbin, plunger piston,
A holding frame that also serves as a granger, a rond holder, and a solenoid core; 3b is an n-th atmosphere introduction pipe provided in the pulp body 3; 4 is a parantha valve installed in the air passage 3c and driven by the solenoid IVc; , so that a negative pressure in the opposite direction that is balanced with the negative pressure applied to the pulp 2VC is applied. 6 is the piston rod that attaches valve 2.4, 7 is the piston rod,
:x) N.

This is a coil spring whose one end is brought into contact with the tip of the plunger 16. and the solenoid 1
When the solenoid coil 1bvc is set to 1, the plunger piston 1d, plunger 1e, and piston rod 6 resist the spring force of the coil spring 7. 7 to the right in FIG. 1, and the air passage 3. The amount of intake air is adjusted by controlling the cross-sectional area of the flow.

By the way, the plunger 1e, the piston rods e and H
11! Since there is a relationship in which the ffl attraction force and the force of the coil spring 7 influence each other, this 71. 1. are fitted into one solenoid core 117 so that the central axes of their tips coincide with each other at l/-1. Two rod holders 1/11. I'm supporting myself. 1 - Solenoid core and holding frame 1gi at 17 Solenoid 1 to valve body 3
When it is fixed to γf, it is integrated into the structure that spans between γf, and the like.

Therefore, when tightening and fixing the solenoid 1 and the valve body 3 using the screws 8, if the tightening force is unevenly applied, the holding frame 1g will bend and each rod holder 1
f, plunger 1#, and piston rod 6 are distorted.

As a result, the plunger 1- and the piston rod 7 become difficult to slide inside each rod holder 1f, and they no longer move in response to the drive current to the solenoid coil 1b and the actuation force of the coil spring 7. There is a problem in that the input current-air flow rate characteristic of this air flow rate regulating valve becomes unstable and irregular, and the rotational speed of the engine during idling becomes unstable.

The present invention focuses on such conventional problems (7), and includes a holding frame that supports the granger via a rod holder on the renoid side, and a holding frame that supports the piston rod via the rod holder. The structure is such that each holding frame does not bend even if the tightening force between the solenoid and the valve body is uneven at times. Therefore, each rod holder, plunger, and piston rod are not strained and slide smoothly, thereby stabilizing the current-air flow characteristics for the solenoid coil, thereby providing air flow regulation. do.

Embodiments of the present invention will be specifically explained below with reference to the drawings. FIG. 2 shows one embodiment, and the difference in its configuration from that shown in FIG. 1 is that the solenoid core is used as a solenoid core. The holding frame is divided into two parts.

That is, in Fig. 2 1/r, 1h and 11th n
, separately installed for each solenoid 1 and pulp body 3]
In the holding frame 7, the holding frame 1jH can be made of a non-magnetic material. In addition, each of these holding frames 1h.

1i has 1. The same rod holder 1f as the one above is inserted into each of these rod holders 1.
The plunger 18 and the piston rod 6 are at f#
It has a movable π bearing n.

Next, the entire operation will be explained.

As mentioned above, the holding frame 1h is connected to the solenoid 1, and the holding frame 1h is connected to the solenoid 1.
i is attached to the valve body 3, and the holding frames 1, 1i, and 1° are each provided with an independent E7.
The plunger 1 and piston rod 6 are installed, so that the solenoid 1 and valve body 3 are connected. screw 8
Even if the tightening force is uneven when integrally connected with
k, 1it'' (!l-There is no bending between each rod holder 1f, y plunger 1e and piston rod 6, and next, the plunger 1e and piston rod 6 must be bent inside each rod holder 1f. The electromagnetic force and coil spring 7 caused by the solenoid coil 16 and solenoid core IAK can be smoothly slid.
It is now possible to apply the repulsive force to the plunger 1e and the piston 1e with high sensitivity.
Figure 1 shows stabilization of input current-airflow characteristics and improved reliability.
．． It is.

As explained above, the present invention involves the movement of the plunger operated by the electromagnetic force of the solenoid, which is transmitted to the piston rod with the valve installed in the valve body, and the air connected to the atmospheric passage and the intake manifold. In the air flow rate regulating valve 17, the flow rate cross-sectional area between the passage and the passage is adjusted by the pulp, the holding frame supporting the plunger via the rod holder is placed on the solenoid side, and the piston is attached via the rod holder (2). The retention frame that supports the rod is provided separately for each valve body.
:, f), Even if the tightening force between the 7lenoid and the valve body is uneven, each holding frame will not bend, and each rod holder, 1lunge, and piston rod will not be bent.
Isn't it on each rod holder to Francia and piston rod for this? In addition to being able to slide smoothly, f'LVC can stabilize the characteristics of the air flow rate with respect to the input current. Furthermore, the screws do not require any skill to tighten, and the desired input current-air flow rate characteristics can be reliably obtained no matter how many people do the tightening work.

[Brief explanation of drawings]

FIG. 1 is a sectional view of a conventional air flow regulating valve, and FIG. 2 is a sectional view of the air flow t! of the present invention. Il! FIG. 2 is a sectional view showing one embodiment of the I valve. 1... Solenoid, 1e... Granger, 1f...
・Rod holder, 1g... Holding frame, 2... Pulp, 3
...bulp body, 3α... atmospheric passage, 3c...
Air passage, 6...piston rond.

Claims (1)

[Claims] The movement of the plunger actuated by the electromagnetic force of the solenoid is transmitted to a piston mid that has a valve that moves within the pulp body, and the cross-sectional area of the air flow between the atmospheric passage and the air passage connected to the intake manifold is controlled by the pulp body. In an air flow regulating valve that is adjusted by
A holding frame for supporting the granger via a rod holder is provided on the solenoid side, and a holding frame for supporting the piston mid via a rod holder is provided on the valve body, respectively. valve.