CN201980220U

CN201980220U - Electronic control type vacuum booster with emergency braking function

Info

Publication number: CN201980220U
Application number: CN2010202903289U
Authority: CN
Inventors: 赵凯
Original assignee: Yibin Vocational and Technical College
Current assignee: Zhejiang Zhongchang Auto Parts Co., Ltd.
Priority date: 2010-08-12
Filing date: 2010-08-12
Publication date: 2011-09-21
Anticipated expiration: 2020-08-12

Abstract

The utility model relates to an electronic control type vacuum booster with an emergency braking function, which comprises a vacuum air chamber (1), a working air chamber (15) and a magnet coil (13) arranged in the middle of a piston body (6), wherein a booster diaphragm (4) is arranged between the vacuum air chamber (1) and the working air chamber (15). The electronic control type vacuum booster is technically characterized in that an air control valve port plunger (8) in a control valve assembly consists of an armature, the turning-off of an air valve port is controlled by the valve port plunger and a reverse control spring (17), an emergency vacuum valve body (12) and a control panel (14) are arranged in a cavity of the piston body, and the emergency vacuum valve body (12) is controlled to work by the magnet coil, so that the vacuum booster can achieve maximum servo power quickly and timely realize braking, and the driving safety is improved.

Description

A kind of electric-controlled type band emergency braking function vacuum booster

Technical field

The utility model relates to a kind of Pneumatic component vacuum booster of automobile, particularly relates to a kind of automobile vacuum booster that is applicable to the vehicle use of disposing ABS.

Background technology

Automobile is one of vehicle of running at high speed, and along with the continuous increase of automobile pollution, and people are to the pay attention to day by day of personal lives and properties, and the function of brake system of car and quality need further to promote.

Existing car, este wagon, utility van and Light-duty Vehicle lorry all adopt hydraulic braking, in hydraulic-braking system, the brake pedal that tramps with one's feet removes to promote vacuum booster input force push rod, the power of the input force push rod of vehicle vacuum booster adds that the servo force that vacuum booster gives together acts on the vacuum booster tappet, tappet acts on the piston of master brake cylinder and produces corresponding hydraulic braking force and is transferred to braking and divides on the cylinder, and the deceleration that comes control vehicle by the braking to wheel.

Vacuum booster is the brake power assist unit in the hydraulic efficiency pressure system, utilizing vacuum that vacuum that engine petrol when work produce at the throttle gate place or vacuum pump produce to promote master cylinder piston by the input force of vacuum booster input force push rod with certain proportion makes master brake cylinder produce brake fluid pressure, its inside mainly contains a piston body as one of main function unit, diaphragm is housed at the piston body middle part and the diaphragm dish is divided into two parts with cavity, atmosphere is commonly referred to as the work air chamber mutually during part work, another part is commonly referred to as vacuum room by breather cheek valve mutually with vacuum lamp, the work air chamber body that communicates with atmosphere makes air chamber in-to-in barometric pressure gradually greater than the fixing vacuum pressure of vacuum room with the input force increase of vacuum booster input force push rod, therefore make a difference of pressure of generation on diaphragm dish both sides, the power that the pressure that produces on the diaphragm dish drives on piston body and the input force push rod affacts on the tappet together, produces the brake fluid pressure that satisfies brake request.

The vehicle that does not dispose ABS can be because of the complete locking of wheel produces unsafe conditions such as whipping or sideslip when emergency braking, and the vehicle that has disposed the ABS system then can be avoided the generation of above-mentioned condition effectively.ABS (Anti-lock Brake System) i.e. " anti-skid brake system " can effectively control wheel and remain on certain rolling condition, improves the stability of glancing impact automobile and the automobile brake perfrmance under the relatively poor pavement conditions.ABS is by being installed in the rotating speed that tachogen on each wheel constantly detects each wheel, calculate the slip rate of wheel by ECU, and compare with desirable slip rate, by the ABS solenoid electric valve pressure of brake system is adjusted, brake fluid pressure is increased or reduce, the slip rate with desirable is identical as far as possible for feasible actual slip rate, wheel is in the state that a kind of existing rolling has slip again, guarantees that navigating mate lowers the speed of a motor vehicle under the situation that can control the driving direction in the shortest time.

It is the method for artificial mode that traditional vacuum booster adopts, vacuum booster is braked servo vacuum power in proportion according to the size of treadle effort, but work as navigating mate when urgent reaction of constantly sending is slow slightly, vacuum booster is still braked by treadle effort, particularly the navigating mate that the acceleration/accel the inside of brake pedal is contained requires the information of emergency braking not handle it, along with development of electronic technology, particularly to make that the excavation of information becomes more and more easier in the development of computer technology and line traffic control technology, and the various new function of brake system also more and more obtains the concern in market.

The utility model content

The utility model has solved vacuum booster that prior art exists can only manual problem, and a kind of electric-controlled type vacuum booster that can promptly implement full servo force braking under bursty state is provided.

The technical scheme that its technical matters that solves the utility model adopts is: a kind of electric-controlled type band emergency braking function vacuum helps device to comprise vacuum room (1), work air chamber (15) and be positioned at magnet coil (13) in the middle of the piston body (6), between vacuum room (1) and work air chamber (15), be provided with servo-unit diaphragm (4), piston body (6) is positioned at ante-chamber, and be provided with tappet (19), it is characterized in that being in control valve assembly, constitute the air valve port by air diverter valve oral pillar plug (8) and the reverse controlling spring of air diverter valve oral pillar plug (17), urgent vacuum valve body (12) and control panel (14) are arranged in the piston body cavity, and wherein piston body (6) divides two bodies to constitute.

This electric-controlled type band emergency braking function vacuum booster, generally speaking, all adopt artificial pedal brake pattern, satisfy the requirement of navigating mate normal brake application operation, and need just to adopt electromagnetic valve automatic guidance emergency braking under the urgent full load braking situation when the acceleration/accel of automobile ECU module by brake pedal perceives navigating mate; When the needs automatic emergency brake, automobile ECU sends the execution signal, electromagnetic valve energising in the piston body, the control cock oral pillar plug of being made up of armature overcomes the pressure of the reverse controlling spring of control cock oral pillar plug, the atmosphere valve port is farthest opened, simultaneously, the reverse controlling spring of control cock oral pillar plug is pressed into dead circle, and give pressure of control panel by spring washer, this pressure make can deformation the control panel variation that produces matrix, urgent vacuum valve body feasible and that control panel is linked together moves, the sealing valve port of urgent vacuum valve body contacts and produces pressure with input control valve, both replaced original vacuum valve port to carry out the sealing of work air chamber and vacuum room, strengthened the aperture of air valve port again, make atmosphere can enter into the work air chamber faster, reach a barometric pressure rapidly, and then make vacuum booster reach maximum servo force, at this moment, vacuum booster enters into the state of emergency auto braking, because full application of brake has produced the tendency of wheel lockup, the ABS module is started working, make automobile under the band sliding mode that even rolls, brake, when the acceleration/accel that perceives the speed of car and car by car speed sensor up to ECU all reaches a threshold value, these two threshold value numerical value are all very little when being provided with, depleted substantially with the kinetic energy that guarantees car, the automobile ECU module is sent instruction, magnet coil is de-energized, control cock oral pillar plug return back to above the input control valve valve seat under the effect of the reverse controlling spring of control cock oral pillar plug, produce the Deformation Control dish and recover prototype, the urgent vacuum valve body that connects with control panel resets thereupon, the valve port of urgent vacuum valve body is opened, servo-unit withdraws from automatic control state, returns to conventional initial condition.

As preferably, can produce the Deformation Control dish and choose rubber as material.

As preferably, control cock oral pillar plug is by armature and metallic material be combined into.

The utility model is skillfully constructed, by in piston body, adding a magnet coil, make the reverse controlling spring of magnet coil and control cock oral pillar plug and control cock oral pillar plug form an electromagnetic valve, simultaneously, under the effect of the reverse controlling spring of control cock oral pillar plug, make control panel form urgent vacuum valve port, finished the work air chamber of vacuum valve port and the sealing of vacuum room, make it have following effective effect compared with the prior art with connecting the urgent vacuum valve body that becomes one:

1, adopts artificial pedal brake pattern, satisfy navigating mate normal brake application demand;

2, when navigating mate runs into emergency situation and needs emergency braking, full servo force emergency braking function makes vacuum help device to enter into maximal servo power-assisted state more quickly automatically, reduce the incidence of traffic accident, protected the safety of personal property better and reduced the economic loss that traffic accident produces;

3, mounting process is reasonable, can not produce big influence, long service life to the performance of original vacuum booster.

Description of drawings

Fig. 1 is a kind of structural representation of the present utility model;

Fig. 2 is an A of the present utility model portion enlarged diagram;

Fig. 3 is the enlarged diagram of the utility model (during the emergency braking mode of operation) A portion.

The specific embodiment

Below by embodiment, and in conjunction with the accompanying drawings the technical solution of the utility model is described further, referring to Fig. 1, Fig. 2, shown in Figure 3, a kind of electric-controlled type band of the utility model emergency braking function vacuum booster, structure comprises: vacuum room (1), rear housing (2), diaphragm dish (3), diaphragm (4), front case (5), piston body (6), spring shim (7), air diverter valve oral pillar plug (8), air diverter valve post (9), input force push rod (10), input force control cock valve seat (11), urgent vacuum valve body (12), magnet coil (13), control panel (14), work air chamber (15), magnet coil input terminal (16), the reverse controlling spring of air diverter valve oral pillar plug (17), reaction plate (18), tappet (19), piston body retracing spring (20), unidirectional vacuum valve (21), wherein, the input force push rod connects brake pedal, tappet contacts with the master brake cylinder first piston, at glancing impact, tappet works together to master brake cylinder first piston end of body with the servo force of vacuum booster generation and the input force of input force push rod, and vehicle is braked.

The operation of this electric-controlled type band emergency braking function vacuum booster is as follows:

Generally speaking, all adopt artificial pedal brake pattern, satisfy the demand of navigating mate normal brake application operation, and under being in an emergency, automobile computer ECU learns that by the brake pedal acceleration pick-up chaufeur has the emergency braking demand, the corresponding terminal of ECU is powered to the magnet coil input terminal, and this electric-controlled type band emergency braking function vacuum booster enters into the automatic emergency brake pattern.

When the needs emergency braking, automobile computer ECU sends the execution signal, magnet coil energising in the piston body, because air diverter valve oral pillar plug is made of armature, formed an electromagnetic valve structure, magnet coil produces very energetically air diverter valve oral pillar plug, make the air valve port be opened, and the reverse controlling spring of control cock oral pillar plug is pressed into dead circle, this suction passes to spring washer by the reverse controlling spring of control cock oral pillar plug, spring washer passes to control panel with power, when the centre of control panel is recessed, projection around the control panel will be released with the urgent vacuum valve body that control panel is linked together, make the vacuum valve port of urgent vacuum valve end of body and input force control cock valve seat force together tightly, so just sealed the vacuum valve port, at this moment, the air valve port opening is very big, air enters into the work air chamber rapidly and knows identically with external pressure (1Bar), and servo-unit has reached maximum servo force like this; Obtain speed and acceleration/accel to a very low threshold value time up to automobile computer ECU by car speed sensor, the value of speed and acceleration/accel shows that vehicle energy loses substantially in the time of simultaneously very low, at this moment automobile computer ECU interrupts the power supply to the magnet coil terminal, air diverter valve oral pillar plug is being got back under the control of the reverse controlling spring of air diverter valve oral pillar plug on the input force control cock valve seat, closed the air valve port, the initial length that returns to of the reverse controlling spring of air diverter valve oral pillar plug makes pressure be returned to initial condition simultaneously, the power of spring washer becomes very little, make recessed control panel recover prototype, the urgent vacuum valve body that is linked together with control panel also returns to initial position, urgent vacuum valve port is opened, the work air chamber and the vacuum room of servo-unit communicate, the draught head on diaphragm both sides is 0, there is not servo force to produce, braking obtains removing, and this electric-controlled type band emergency braking function vacuum booster enters into initial condition.

The foregoing description only is used for further specifying a kind of electric-controlled type band emergency braking function vacuum booster of the present utility model; but the utility model is not limited to embodiment; every foundation technical spirit of the present utility model is to any simple modification, equivalent variations and modification that above embodiment did; such change does not think and breaks away from scope of the present utility model that what all were such will be included within the protection domain of the utility model claim the conspicuous modification of described those skilled in the art.

Claims

1. electric-controlled type band emergency braking function vacuum booster, the utility model vacuum booster comprises vacuum room (1), work air chamber (15) and be positioned at magnet coil (13) in the middle of the piston body (6), between vacuum room (1) and work air chamber (15), be provided with servo-unit diaphragm (4), piston body (6) is positioned at ante-chamber, and be provided with tappet (19), its technical feature of structure is in control valve assembly, constitute choker relief valve by air diverter valve oral pillar plug (8) and the reverse controlling spring of air diverter valve oral pillar plug (17), urgent vacuum valve body (12) and control panel (14) are arranged in the piston body cavity.