CN202345658U

CN202345658U - Normally open valve of electronic stability program (ESP)

Info

Publication number: CN202345658U
Application number: CN2011203043509U
Authority: CN
Inventors: 郑文荣; 潘智慧; 郑利水
Original assignee: Zhejiang Asia Pacific Mechanical and Electronic Co Ltd
Current assignee: Zhejiang Asia Pacific Mechanical and Electronic Co Ltd
Priority date: 2011-08-21
Filing date: 2011-08-21
Publication date: 2012-07-25
Anticipated expiration: 2021-08-21

Abstract

The utility model discloses a normally open valve of an ESP and comprises a coil, a guide sleeve, an armature core, an ejector rod, a valve body, a spring, seal rings, an oil filter, and a base, wherein the coil is sleeved on the guide sleeve which is welded with the valve body; the armature core is placed in the guide sleeve, and an air gap exists between the armature core and the valve body so that the armature core can move up and down in the guide sleeve; the ejector rod is arranged in the valve body, one end of the ejector rod contacts with the armature core, and the other end of the ejector rod is a round sphere and contacts with one end of the spring; the base is embedded in the valve body, abuts against the other end of the spring, has an interference fit with the valve body, and is provided with an oil inlet channel. According to the normally open valve, a pressure-limiting valve and a normally open valve of the normally open valve are integrated in a real sense, so that voltage limiting can be achieved through stipulation and control of current without increase of pressure-limiting valve parts for the normally open valve; simultaneously, the pressure-limiting valve and the normally open valve share one valve port, and enables the structure of the normally open valve is enabled to be simplified greatly. The normally open valve has the advantages of convenient installation, simple structure and low cost.

Description

A kind of ESP normally open valve

Technical field

The utility model relates to a kind of electromagnetic valve, relates in particular to the actr in a kind of vehicle electronics driving stability system (ESP).

Background technology

Brake system is the critical component on the automobile, how to adopt more that the failure-free brake system of car makes running car safer more comfortable, is the target that auto trade is constantly pursued.Automobile hydraulic anti-lock brake system (ABS), vehicle electronics driving stability system (ESP) successively emerge under this background.Present domestic automobile hydraulic pressure anti-lock brake system (ABS) volume shipment at home, and vehicle electronics driving stability system still is in space state at home.Compared to ABS, the function of ESP is more powerful, safety is also higher.Vehicle electronics driving stability system (ESP) is made up of sensor, electronic control unit (ECU) and actr.

Fig. 1 is an ESP actr fundamental diagram, the pressure limiting function of the stable regulation when realizing conventional brake and the running car in the ESP actr by the parallel connection of NORM OPN high-speed switch valve and limiting valve among the figure.

In existing ESP actr, normally open valve and limiting valve separate, even design limiting valve in normally open valve, also only are structural simple syndication.Up to the present, Shang Weiyou is with normally open valve with limiting valve truly is integrated and with the ESP normally open valve of limiting valve function report.

The utility model content

The purpose of the utility model is the deficiency to prior art, and a kind of ESP normally open valve is provided.

The purpose of the utility model realizes through following technical scheme: a kind of ESP normally open valve, and it comprises: coil, guide pin bushing, armature core, push rod, valve body, spring, seal ring, oily filter, base and seal ring; Wherein, coil is enclosed within on the guide pin bushing, and guide pin bushing and valve body weld together, armature core have an air gap between armature core and valve body in guide pin bushing, thus can be in guide pin bushing up-and-down movement; Push rod is in valve body, and an end contacts with the armature core, and the other end is the ball face, with an end in contact of spring; Base is embedded in the valve body, withstands the other end of spring, and interference fit between base and valve body has the oil inlet passage in the base; Seal ring is enclosed within on the cylindrical of valve body, and oily filter ruffle outside the oil export and block seal ring, makes it that motion to axial not arranged on the valve body cylindrical on the valve body cylindrical; Interference fit between oil filter and valve body; Seal ring is installed in the groove of valve body cylindrical.

The beneficial effect of the utility model is: through realizing integration truly to the limiting valve in the normally open valve and normally open valve, make normally open valve under the situation that does not increase the limiting valve parts, the size through the regulation control current just can realize the pressure limiting function.Simultaneously because normally open valve and the shared valve port of limiting valve are simplified the structure of normally open valve greatly.Have characteristics easy for installation, simple in structure and that cost is low.

Description of drawings

Fig. 1 is an ESP actr fundamental diagram;

Fig. 2 is a band limiting valve function normally open valve constructional drawing;

Fig. 3 is the normally open valve constructional drawing of limiting valve under in working order;

Fig. 4 is the force analysis figure of push rod;

Among the figure, coil 1, guide pin bushing 2, armature core 3, push rod 4, valve body 5, spring 6, seal ring 7, oil filter 8, base 9, seal ring 10.

The specific embodiment

Characteristic, principle of work and working process below in conjunction with description of drawings the utility model.

Fig. 2 is the utility model band limiting valve function normally open valve constructional drawing.As shown in Figure 2, the utility model ESP normally open valve comprises: coil 1, guide pin bushing 2, armature core 3, push rod 4, valve body 5, spring 6, seal ring 7, oil filter 8, base 9 and seal ring 10.Wherein, coil 1 is enclosed within on the guide pin bushing 2, guide pin bushing 2 and valve body 5 weld togethers, armature core 3 is in guide pin bushing 2,5 of armature core 3 and valve bodies have an air gap, thereby can be in guide pin bushing 2 up-and-down movement; Push rod 4 is in valve body 5, and an end contacts with armature core 3, and the other end is the ball face, with an end in contact of spring 6; Base 9 is embedded in the valve body 5, withstands the other end of

spring

6, and 5 interference fit of base 9 and valve body have the oil inlet passage in the base 9; Seal ring 7 is enclosed within on the cylindrical of valve body 5, and oil filter 8 is enclosed within oil exit and block seal ring 7 of valve body 5 cylindricals, makes it that motion to axial not arranged on valve body 5 cylindricals;

Oil filter

8 and 5 interference fit of valve body; Seal ring 10 is installed in the groove of valve body 5 cylindricals.

The ESP normally open valve principle of work of the band limiting valve function that the utility model provides is: under coil 1 energising normally open valve closing state; At this time push rod 4 is carried out force analysis and can find (as shown in Figure 4); Act on the push rod 4 in inflow point and exit generation oil pressure difference; The power F1 of push rod 4 except produced by oil pressure, the electromagnetic force F2 that also has coil electricity to produce is delivered to the compressive force F3 that produces with spring 6 on the push rod 4 through armature core 3.

By finding out among Fig. 1 and Fig. 2, under the cold situation of coil, normally open valve is in the state of opening, and this time, limiting valve had no effect in actr.Under the situation of coil 1 energising, the coil 1 inner magnetic field that produces, under the effect of electromagnetic force, armature core 3 relative valve bodies 5 produce motion, and this motion has been delivered on the push rod 4 by armature core 3.So armature core 3 moves along the direction generation of valve body 5 with push rod 4 together.Touch the valve port (as shown in Figure 3) of base up to the ball face of push rod 4, have only in this state that limiting valve just possibly work, that is to say that normally open valve and limiting valve are with a kind of closed condition.This has brought possibility for integration between the two.The characteristic of the utility model is the shared valve port of normally open valve and limiting valve.

Armature core 3 is installed with valve body 5 and is produced air gap, can control the up and down of armature core 3 through the energising and the outage of coil 1, and the activity of armature core 3 can drive the activity of push rod 4.Under coil 1 off-position, normally open valve is in open mode, and this time, limiting valve cut little ice.Under coil 1 "on" position, normally open valve is in closed condition, and this time, limiting valve will begin to work when arriving to a certain degree greatly when the pressure of import and outlet.Can draw the pressure extent of limiting valve restriction by the principle of work of limiting valve can be fully decided by the size of electric current.Simultaneously through in the ECU of the vehicle electronics driving stability ESP of system, increasing the module of ballast coil electric current, the electrical current that makes coil under any circumstance all remains on and establishes timer-operated size.

Claims

1. an ESP normally open valve is characterized in that it comprises: coil (1), guide pin bushing (2), armature core (3), push rod (4), valve body (5), spring (6), seal ring (7), oil filter (8), base (9) and seal ring (10); Wherein, coil (1) is enclosed within on the guide pin bushing (2), and guide pin bushing (2) and valve body (5) weld together, armature core (3) have air gap between armature core (3) and valve body (5) in guide pin bushing (2); Push rod (4) is in valve body (5), and an end contacts with armature core (3), and the other end is the ball face, with an end in contact of spring (6); Base (9) is embedded in the valve body (5), withstands the other end of spring (6), interference fit between base (9) and valve body (5), and base has the oil inlet passage in (9); Seal ring (7) is enclosed within on the cylindrical of valve body (5), and oil filter (8) is enclosed within oil exit and block seal ring (7) of valve body (5) cylindrical; Interference fit between oil filter (8) and valve body (5); Seal ring (10) is installed in the groove of valve body (5) cylindrical.