阅读说明：本技术 电磁阀、电磁吸入阀机构以及高压燃料泵 (Electromagnetic valve, electromagnetic suction valve mechanism, and high-pressure fuel pump ) 是由 齐藤淳治 臼井悟史 根本雅史 秋山壮嗣 德丸千彰 内山康久 早谷政彦 小野濑亨 枇本 于 2018-04-24 设计创作，主要内容包括：本发明提供一种即便在推进了高压化和大流量化的情况下也抑制吸入阀的径向的运动、提高流量控制性的电磁阀、电磁吸入阀机构或者高压燃料泵。为此,本发明的阀机构具备：弹簧构件,其具有安装定位圈部和可动部,并由与所述安装定位圈部相反的一侧的弹簧支承部固定；以及阀芯,其被所述弹簧构件的所述安装定位圈部的一侧施力；所述阀芯上形成有朝所述弹簧支承部那一侧凸起而且位于所述弹簧构件的径向内侧的凸部,构成为在穿过所述弹簧构件的径向中心、沿弹簧构件轴向切割而得的截面图中,相对于与所述安装定位圈部邻接的所述可动部的至少第一匝的径向两侧的卷材截面而言,所述凸部的顶端部位于所述弹簧支承部的一侧。(The invention provides an electromagnetic valve, an electromagnetic suction valve mechanism or a high-pressure fuel pump which can restrain radial movement of a suction valve and improve flow control performance even though high pressure and large flow are promoted. To this end, the valve mechanism of the present invention includes: a spring member having a mounting collar portion and a movable portion and fixed by a spring support portion on the side opposite to the mounting collar portion; and a valve element which is forced by one side of the installation positioning ring part of the spring component; the valve body is formed with a convex portion that protrudes toward the spring support portion side and is positioned radially inward of the spring member, and a tip end portion of the convex portion is positioned on one side of the spring support portion with respect to a coil material cross section on both sides in a radial direction of at least a first turn of the movable portion adjacent to the attachment bezel portion in a cross-sectional view cut in an axial direction of the spring member through a radial center of the spring member.)

1. A valve mechanism is characterized by comprising:

a spring member having a mounting collar portion and a movable portion and fixed by a spring support portion on the side opposite to the mounting collar portion; and a valve element which is forced by one side of the installation positioning ring part of the spring component;

a convex portion that protrudes toward one side of the spring support portion and is located radially inward of the spring member is formed on the spool,

in a cross-sectional view of the spring member taken through a radial center of the spring member and cut in an axial direction of the spring member, a tip end portion of the convex portion is positioned on one side of the spring support portion with respect to a coil material cross-section on both sides in a radial direction of at least a first turn of the movable portion adjacent to the attachment bezel portion.

2. The valve mechanism of claim 1,

a valve seat for seating and sealing the valve element,

in a cross-sectional view cut along an axial direction of the spring member in a state where the valve element is seated on the valve seat, a tip end portion of the convex portion is positioned on one side of the spring support portion with respect to a coil cross-section on both sides in a radial direction of at least a first turn of the movable portion.

3. The valve mechanism according to claim 1, comprising:

a valve seat that seals by seating the valve element; and

a stopper that restricts movement of the spool in a direction opposite to the valve seat;

the protruding portion is configured such that, in a cross-sectional view cut along an axial direction of the spring member in a state where the valve element is in contact with the stopper, a tip end portion of the protruding portion is located on a side of the spring support portion with respect to a position of a half of an entire length of the spring member.

4. The valve mechanism according to claim 1, comprising:

a valve seat that seals by seating the valve element; and

a stopper that restricts movement of the spool in a direction opposite to the valve seat;

the stopper is configured to have a cylindrical holding portion that holds the spring member radially inward.

5. The valve mechanism of claim 4,

the stopper is configured to hold the spring member by an inner peripheral surface of the holding portion, and a fixing portion for fixing the stopper is provided radially outside the inner peripheral surface.

6. A valve mechanism according to claim 4 or 5,

the stopper is formed by press working.

7. The valve mechanism of claim 1,

the convex portion is formed in a cylindrical shape.

8. The valve mechanism of claim 1,

the valve body is formed of a cylindrical portion having a low height and the cylindrical protruding portion having a height higher than the cylindrical portion.

9. An electromagnetic suction valve mechanism comprising:

the valve mechanism according to any one of claims 1 to 7;

a valve rod which is configured to be different from the valve body, and which applies force to the valve body in a valve opening direction;

an armature that drives the valve rod in a valve closing direction; and

a coil that generates an electromagnetic attraction force that drives the armature in the valve closing direction.

10. A high-pressure fuel pump is characterized by comprising:

a valve mechanism according to any one of claims 1 to 8;

a valve rod which is configured to be different from the valve body, and which applies force to the valve body in a valve opening direction;

an armature that drives the valve rod in a valve closing direction;

a coil that generates an electromagnetic attraction force that drives the armature in the valve closing direction;

a pressurizing chamber located on a downstream side of the valve body and configured to pressurize fuel; and

and a plunger that increases or decreases the volume of the pressurizing chamber.

Technical Field

The invention relates to a solenoid valve, an electromagnetic suction valve mechanism, and a high-pressure fuel pump.

Background

As background art of the high-pressure fuel pump of the present invention, there are techniques described in patent documents 1 and 2. Patent document 1 discloses "a high-pressure fuel pump including a pump housing 1, a plunger 2, and an electromagnetic intake valve 300, the electromagnetic intake valve 300 including a valve 301c, a valve seat 302a for opening and closing a fuel passage by separating and contacting the valve 301c, and a valve stopper 313 against which the valve 301c abuts when the valve is opened, the electromagnetic intake valve 300 being mounted in an electromagnetic intake valve insertion hole 1k formed in the pump housing 1, and the electromagnetic intake valve 300 being controlled to control an amount of discharged fuel, wherein a bottom portion 1ka abutting against the valve stopper 313 and a fuel passage hole 1a penetrating the bottom portion 1ka and communicating both sides of the bottom portion 1ka are provided in the electromagnetic intake valve insertion hole 1 k" (refer to an abstract).

Further, patent document 2 discloses that "includes: a housing main body 11 having a fuel passage 100 that guides fuel to a pressurizing chamber 121; a valve body 30 provided in the fuel passage 100; a valve member 40 including a disk portion 41 that is seated on or separated from the valve seat 34 of the valve body 30 and a hollow cylindrical guide portion 42; a stopper 50 having a cylindrical portion 51; a needle 60 that can abut against the valve member 40; and an electromagnetic drive unit 70 capable of attracting the needle 60 in the valve closing direction of the valve member 40. The stopper 50 covers a side wall surface of the pressurizing chamber 121 of the valve member 40 when viewed from the pressurizing chamber 121 side. The guide portion 42 has a cylindrical guide surface 43 on the inner wall thereof, which is slidable with the outer wall of the cylindrical portion 51 of the stopper 50. The spring 21 is arranged such that at least a part of the axial direction overlaps at least a part of the axial direction of the guide surface 43 "(refer to abstract).

Disclosure of Invention

Problems to be solved by the invention

However, in the case of the suction valve structure described in patent document 1, if the suction valve is forced to tilt in the radial direction or if the suction valve is deflected in the radial direction, the movement cannot be controlled. In this way, the valve seat of the suction valve cannot be made, and there is a problem that the flow rate is reduced or the flow rate control performance is deteriorated. Further, the suction valve contacts the suction valve seat portion obliquely, which causes abrasion of the suction valve seat portion, thereby causing a problem of deterioration of the valve seat performance.

On the other hand, in the case of the suction valve described in patent document 2, the convex portion of the suction valve is slidably guided by the inner diameter cylinder of the valve frame. However, this structure requires a high precision machining accuracy because a recess for holding the spring needs to be machined in the projection of the suction valve, and also has a problem of increased cost because a portion (recess) for holding the spring is machined.

Therefore, an object of the present invention is to provide an electromagnetic valve, an electromagnetic suction valve mechanism, or a high-pressure fuel pump that suppresses radial movement of a suction valve and improves flow rate control even when high pressure and large flow rate are being increased.

Means for solving the problems

In order to solve the above problem, a valve mechanism according to the present invention includes: a spring member having a mounting collar portion and a movable portion and fixed by a spring support portion on the side opposite to the mounting collar portion; and a valve body that is biased by one side of the mounting collar portion of the spring member, wherein a convex portion that protrudes toward one side of the spring support portion and is positioned radially inward of the spring member is formed on the valve body, and a tip end portion of the convex portion is positioned on one side of the spring support portion with respect to a coil material cross section on both sides in a radial direction of at least a first turn of the movable portion adjacent to the mounting collar portion in a cross-sectional view that is cut in an axial direction of the spring member through a radial center of the spring member.

ADVANTAGEOUS EFFECTS OF INVENTION

According to the present invention, it is possible to provide an electromagnetic valve, an electromagnetic suction valve mechanism, or a high-pressure fuel pump that suppresses radial movement of a suction valve and improves flow rate control even when high pressure and large flow rate are promoted.

Problems, configurations, and effects other than those described above will be apparent from the following description of the embodiments.

Drawings

Fig. 1 is an overall sectional view of the high-pressure fuel pump, taken along the axial direction of the plunger.

Fig. 2 is an overall sectional view of the high-pressure fuel pump, taken along a direction perpendicular to the axial direction of the plunger, and is a sectional view taken at the axial center of the intake port and the axial center of the discharge port of the fuel.

Fig. 3 is an overall sectional view of the high-pressure fuel pump at another angle different from fig. 1, and is a sectional view at the center of the suction joint shaft.

Fig. 4 is an enlarged longitudinal sectional view of the electromagnetic suction valve mechanism of the high-pressure fuel pump.

Fig. 5 is a diagram showing the overall configuration of a system including a high-pressure fuel pump.

Fig. 6 is an enlarged view illustrating a structure of a suction valve of the high-pressure fuel pump according to the embodiment of the present invention.

Fig. 7 is an enlarged view illustrating a configuration of the suction valve in a state where the valve body (suction valve 30) is seated on the valve seat (suction valve seat portion 31a) according to the embodiment of the present invention.

Fig. 8 is an enlarged view illustrating a structure of the suction valve in a state where the valve body (suction valve 30) is in contact with the stopper 32 according to the embodiment of the present invention.

Detailed Description

Next, the configuration and operational effects of the high-pressure fuel pump according to the embodiment of the present invention will be described with reference to the drawings. The high-pressure fuel pump of the present embodiment is a high-pressure fuel pump that discharges high-pressure fuel of 20MPa or more. In the drawings, the same reference numerals denote the same elements.