CN201739031U

CN201739031U - Vacuum solenoid

Info

Publication number: CN201739031U
Application number: CN2010202187630U
Authority: CN
Inventors: 李泽平
Original assignee: YIBIN TIANRUIDA AUTO PARTS CO Ltd
Current assignee: YIBIN TIANRUIDA AUTO PARTS CO Ltd
Priority date: 2010-06-08
Filing date: 2010-06-08
Publication date: 2011-02-09
Anticipated expiration: 2020-06-08

Abstract

The utility model relates to a vacuum solenoid comprising a body having a coil component and an armature component; the armature component further comprises a check valve; the solenoid body is also provided with an EGR valve pipe interface and a vacuum source pipe interface; the pipeline between the EGR valve pipe interface and the vacuum source pipe interface is controlled to be on and off through the check valve; the air bypass pipe is provided with an anti-dust cover. The solenoid of the utility model is advantageous in that the on and off of the pulse voltage and the solenoid are in linear changes, which makes acute operations of the solenoid and makes the solenoid response very rapidly; the frequency of the pulse voltage can reach as high as 250 Hz to 300 Hz, which accurately controls the negative pressure or the vacuum degree of the solenoid; further, when the solenoid is closed, it is well sealed, free of leakages. The creative introduction of an anti-dust cover on the solenoid prevents big grains from entering the vacuum channel, thereby, prolonging the service lifetime of the solenoid, which has been tested from thousand experiments.

Description

Vacuum solenoid

Affiliated technical field

The utility model relates to a kind of solenoid valve, is particularly suitable for using on the motor car engine.

Background technique

The EGR technology introduction:

The EGR technology, promptly EGR Technology (Exhaust Gas Recycle) is the Exhaust gas purifying device that is provided with at harmful gas (NOx).It enters combusted cylinder after a part of exhaust cycle is entered suction tude and fresh air mixes once more, and to increase the thermal capacity of mixed gas, the maximum temperature when reducing burning suppresses the generation of NOx.To be ECU in time open according to control vacuum solenoids such as the rotating speed of motor, load (throttle opening), temperature, charge flow rate, delivery temperatures EGR engine control computer, intake depression enters EGR valve vacuum diaphragm chamber through vacuum solenoid, the diaphragm pull bar is with the EGR valve open, small part exhaust in the motor enters gas handling system through the EGR valve, and enters cylinder after mixed gas mixes and participates in burning.Small part waste gas enters the burning that cylinder participates in mixed gas, the temperature when having reduced burning in the cylinder.Because of NOx generates under high-temperature oxygen-enriched condition, thus the generation of NOx suppressed, thus reduced the content of the NOx in the complete machine exhaust.But excessive waste gas participates in recirculation, will influence the catching fire of mixed gas, performance, thereby influences the power character of motor, and particularly when engine idle, low speed, little load and cold machine, the waste gas of recirculation can influence engine performance significantly.So when motor during at idling, low speed, little load and cold machine, ECU control waste gas does not participate in recirculation, avoids engine performance to be affected; When motor surpasses certain rotating speed, loads and reaches certain temperature, ECU control small part waste gas participates in recirculation, and the exhausted air quantity that participates in recirculation is according to the difference of engine speed, load, temperature and exhaust gas temperature and difference is minimum with the NOx that reaches in the waste gas.

In said process, vacuum solenoid has been brought into play enormous function as the executive component of a key, ECU sends instruction according to the signal of sensor to vacuum solenoid, changes its degree of vacuum size, thereby change the aperture of EGR valve valve, reached the effect of adjusting the waste gas circulation amount.

Present stage, the subject matter that exists of vacuum solenoid was: the response time is long, has tangible hysteresis quality, often the operating mode of motor change afterwards with, the EGR valve is not for a long time all adjusted to corresponding action, makes the effect of whole system all very undesirable so undoubtedly; The secondth, poor durability, the serviceability of vacuum solenoid has become the bottleneck of whole system.

Summary of the invention

It is rapid that the purpose of this utility model provides a kind of response, and the high vacuum solenoid of serviceability is to remedy the deficiency of prior art.

The technical solution adopted in the utility model is: vacuum solenoid, comprise body, and it is characterized in that: body is provided with coil block and armature component, and armature component comprises one-way valve; Also be provided with EGR valve pipe interface and vacuum source pipe interface on the body, the pipeline between EGR valve pipe interface and the vacuum source pipe interface is controlled break-make by one-way valve; On the air by-pass pipe, dust-proof cover is arranged.

The beneficial effects of the utility model are: because the unlatching of pulsed voltage and solenoid valve is linear change, so solenoid valve is active in one's movements, reaction velocity is fast, and pulse repetition frequency is up to 250HZ～300HZ, make negative pressure (degree of vacuum) control of solenoid valve accurate, and close tight; Unique dust-proof cover design prevents that the large particle dust from entering vacuum passage, and long service life has been passed through 10,000,000 action tests.

Description of drawings

Fig. 1 is the structured flowchart of egr system;

Fig. 1 is the utility model embodiment's a profile schematic representation;

Fig. 2 is the utility model embodiment's a structural representation.

Vacuum solenoid comprises body, it is characterized in that: body is provided with coil block 5 and armature component 6, and armature component 6 comprises one-way valve 4; Also be provided with EGR valve pipe interface 2 and vacuum source pipe interface 3 on the body 1, the pipeline between EGR valve pipe interface 2 and the vacuum source pipe interface 3 is by one-way valve 4 control break-makes; Dust-proof cover 9 is arranged on air by-pass pipe 8.10 is connector.

Embodiment

Embodiment:

At ordinary times, when motor car engine is in running state, and when not having pulse signal, one-way valve 4 is in normally open.This moment, EGR valve pipe interface 2 communicated with air by-pass pipe 8, so the straight-through atmosphere of EGR valve is in atmospheric pressure state, did not have degree of vacuum, thereby the EGR valve cuts out, and waste gas does not just participate in the circulating combustion of engine chamber yet.

When being in little load conditions such as idling, warming-up operation when automobile, car running computer ECU provides pulse signal and is delivered to coil block 5 in the vacuum solenoid by connector 10, coil block 5 gets electric generation magnetic field, armature component 6 in it just upwards produces displacement, at this moment, one-way valve 4 ends the passage between EGR valve pipe interface 2 and the air by-pass pipe 8, simultaneously, EGR valve pipe interface 2 and vacuum source pipe interface 3 are communicated with, degree of vacuum is transported to the EGR valve by vacuum solenoid, the EGR valve is opened, and waste gas just participates in circulation.

Dust-proof cover 9 can play a role in filtering to the air in air by-pass pipe 8 enters body 1, to prolong the working life of vacuum solenoid.

Claims

1. vacuum solenoid comprises body, it is characterized in that: body is provided with coil block and armature component, and armature component comprises one-way valve; Also be provided with EGR valve pipe interface and vacuum source pipe interface on the body, the pipeline between EGR valve pipe interface and the vacuum source pipe interface is controlled break-make by one-way valve; On the air by-pass pipe, dust-proof cover is arranged.