CN100554052C - Electric control vacuum booster and control method - Google Patents
Electric control vacuum booster and control method Download PDFInfo
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- CN100554052C CN100554052C CNB2006100323874A CN200610032387A CN100554052C CN 100554052 C CN100554052 C CN 100554052C CN B2006100323874 A CNB2006100323874 A CN B2006100323874A CN 200610032387 A CN200610032387 A CN 200610032387A CN 100554052 C CN100554052 C CN 100554052C
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Abstract
The invention provides a kind of artificial pedal brake pattern that both kept, satisfy the needs of navigating mate normal brake application operation or emergency brake operations, the technical scheme of electric control vacuum booster that again can be by the automatic controlling system braking; Design-calculated electric control vacuum booster of the present invention and autonomous cruise speed system connect, and can substitute artificial emergency braking under tyre break, situation such as crashproof; Also can be applicable to maintain safe distance, the autobrake of application scenario such as automatic backing; The present invention can be used for the reformation of electric control of novel evacuated servo-unit product development and existing vacuum booster.
Description
Technical field
The present invention relates to vacuum automobile power brake servomechanism, particularly both kept artificial pedal brake pattern, can be used for the electric control vacuum booster and the control method thereof of automatic guidance braking again.
Background technology
Automobile is the vehicle of running at high speed, and the very difficult accident to external world of human brain is made a response under many circumstances, and that just more can not look to navigating mate in case of emergency one to make accurate operation surely.Driver and conductor's lease of life is transient, therefore, needs a kind of servomechanism that can accept the automatic guidance braking.
Have the vacuum booster principle now as shown in Figure 4, vacuum booster mainly is made up of parts such as servo-unit housing 1, booster piston 2, valve rod body 3, input bar 4, input return spring 5, control cock 6, pull back spring 7, brake push rods 8.Vacuum valve in the control cock 6 and atmos-valve have constituted the two position three-way valve that vacuum valve often leaves, and when control cock 6 is in initial condition, operate chamber 1b and are communicated with vacuum chamber 1a by vacuum valve, and vacuum booster is in initial condition, the brakeless action.When control cock 6 is pushed into braking mode, vacuum valve cuts out, and atmos-valve is opened, and operation chamber 1b is communicated with atmosphere N by atmos-valve, and booster piston 2 drives brake push rod 8 generation braking distances under the draught head effect.
Under existing condition cooperates, give vacuum-assisted brake servomechanism electric control braking function, substitute and manually carry out brake operating, will be to improving vehicle safety performance, reducing the very positive effect of road accident rate performance.
Summary of the invention
The object of the invention technology solves first problem: a kind of artificial pedal brake pattern that both kept is provided, satisfy the needs of operation of navigating mate normal brake application or emergency brake operations, can in case of emergency carry out the technical scheme of the electric control vacuum booster of emergency brake operations again by autonomous cruise speed system.
The object of the invention technology solves second problem: under same electric control vacuum booster structural pattern, carry out the normal brake application operation by autonomous cruise speed system.
Design-calculated electric control vacuum booster of the present invention is characterized in that: electric control vacuum booster is made of vacuum booster, pilot piping, electromagnetic valve; Vacuum booster by servo-unit housing, booster piston, valve rod body, input bar, input return spring, control cock, pull back spring, brake push rod, etc. parts form, booster piston is installed in the servo-unit housing, and servo-unit is divided into the operation chamber that the vacuum chamber that links to each other with vacuum source and pedal brake atmosphere enter; The front end of valve rod body is connected with booster piston, and stretch out outside the servo-unit housing from the operation chamber valve rod body rear end; Control cock is installed in the valve rod body, is connected with the input bar, and the vacuum valve of control cock is opened under the effect of input return spring, and atmos-valve cuts out; Vacuum valve forms the gas circuit of connecting through pilot piping with the normally open valve door of electromagnetic valve, will operate chamber and be communicated with vacuum source and vacuum chamber; The normal closed gate of electromagnetic valve is connected between atmosphere and the pilot piping that is communicated with of operation chamber, with atmos-valve formation atmosphere to the gas circuit in parallel of operating chamber; When control cock is pushed into braking mode, or electromagnetic valve is by current drives during to transformation condition, and vacuum source and vacuum chamber to the gas circuit of operating chamber is closed, and operation chamber to the gas circuit of atmosphere is communicated with.
The control method of the realization first purpose emergency braking of electric control vacuum booster, it is characterized in that: when the vacuum servo-unit by obtaining negative pressure with vacuum source bonded assembly pipeline, when no automatic guidance braking needs, electromagnetic valve does not have drive current, be communicated with vacuum chamber and the electromagnetic valve valve place normally open of operating chamber, make vacuum chamber and operation chamber equate that with vacuum source air pressure booster piston is in initial position under the effect of pull back spring, the action of brake push rod no-output;
Automobile under steam, when navigating mate needed normal brake application, the pedal brake masterpiece was used to import bar and promotes control cock, the vacuum valve that drives in the control cock cuts out, atmos-valve is opened, and atmosphere enters the operation chamber through atmos-valve, and booster piston drive brake push rod moves forward under the draught head effect; When keeping the input bar not move forward, booster piston drives valve rod body adjusting control valve, rests on current artificial pedal brake position, the stroke that brake push rod output is suitable, the braking force of promotion master brake cylinder output appropriateness; When the cancellation glancing impact, pedal brake power is removed, control cock is closed atmos-valve under the effect of input return spring, open vacuum valve, the operation chamber is often opened with vacuum chamber by the electromagnetic valve valve and is communicated with, vacuum chamber and operation chamber equate that with vacuum source air pressure booster piston drives brake push rod and is in initial position again under the effect of pull back spring;
Automobile under steam, when navigating mate needed emergency braking, the pedal brake masterpiece was used to import bar and promotes control cock, and the vacuum valve that drives in the control cock cuts out, atmos-valve is opened, atmosphere enters the operation chamber through atmos-valve, and booster piston moves forward under the draught head effect, artificial pedal brake, make the reach of input bar follow-up booster piston, booster piston moves to the braking limit position, and brake push rod output range promotes master brake cylinder output maximum braking force; When the cancellation glancing impact, pedal brake power is removed, control cock is closed atmos-valve under the effect of input return spring, open vacuum valve, the operation chamber is communicated with vacuum chamber by electromagnetic valve normally open valve door, vacuum chamber and operation chamber equate that with vacuum source air pressure booster piston drives brake push rod and is in initial position again under the effect of pull back spring;
In the running car, when autonomous cruise speed system needs emergency braking, electromagnetic valve obtains the drive current of autonomous cruise speed system and changes, electromagnetic valve will be communicated with the normally open valve door of vacuum chamber and vacuum chamber and close, to connect atmosphere simultaneously opens with the normal closed gate of operation chamber, it is poor that the vacuum chamber of vacuum booster and operation chamber form maximum gas pressure, booster piston moves to the braking limit position under the draught head effect, brake push rod output range promotes master brake cylinder output maximum braking force; When the needs brake off, autonomous cruise speed system is closed electromagnetic valve driving current, electromagnetic valve returns to the normally open valve door and opens, the initial condition that normal closed gate is closed, the operation chamber is communicated with vacuum chamber by the normally open valve door of electromagnetic valve, vacuum chamber and operation chamber equate that with vacuum source air pressure booster piston drives brake push rod and is in initial position again under the effect of pull back spring.
The control method of the realization second purpose normal brake application of electric control vacuum booster, it is characterized in that: in the running car, when autonomous cruise speed system as required during normal brake application, autonomous cruise speed system drives electromagnetic valve in pulse duration modulation (PWM) mode, solenoid control is regulated the normally open valve door that is communicated with vacuum chamber and is closed or open, simultaneously the atmosphere and the normal closed gate of operation chamber are opened or closed, make booster piston rest on certain appropriate position, brake push rod promotes the braking force that master brake cylinder output needs; When the needs brake off, autonomous cruise speed system is closed electromagnetic valve driving current, electromagnetic valve returns to the normally open valve door and opens, the initial condition that normal closed gate is closed, the operation chamber is often opened with vacuum chamber by the electromagnetic valve valve and is communicated with, vacuum chamber and operation chamber equate that with vacuum source air pressure booster piston is in initial position again under the effect of pull back spring.
Design-calculated electric control vacuum booster of the present invention and autonomous cruise speed system connect, and can substitute the artificial emergency braking of implementing under tyre break, situation such as crashproof; Also can be applicable to maintain safe distance, the autobrake of application scenario such as automatic backing; The present invention can be used for the reformation of electric control of novel evacuated servo-unit product development and existing vacuum booster.
Description of drawings
Fig. 1 electric control vacuum booster structural representation;
Fig. 2 electric control vacuum booster schematic diagram;
Control cock details and control gas circuit scheme drawing in Fig. 3 valve rod body;
Fig. 4 has the vacuum booster schematic diagram now.
The specific embodiment
Below in conjunction with Fig. 1, Fig. 2 and Fig. 3 the embodiment of the invention 1 is described in detail.
Electric control vacuum booster is characterized in that: electric control vacuum booster is made of vacuum booster, pilot piping 9, two-position three way magnetic valve 10; Wherein, vacuum booster is made up of parts such as servo-unit housing 1, booster piston 2, valve rod body 3, input bar 4, input return spring 5, control cock 6, pull back spring 7, brake push rods 8; Booster piston 2 is installed in the servo-unit housing 1, and servo-unit is divided into the operation chamber 1b that the vacuum chamber 1a that directly links to each other with vacuum source V and pedal brake atmosphere N enter; The front end of valve rod body 3 is connected with booster piston 2, and stretch out outside the servo-unit housing 1 from operation chamber 1b valve rod body 3 rear ends; Control cock 6 is installed in the valve rod body 3, is connected with input bar 4, and the vacuum valve 6a of control cock 6 under the effect of input return spring 5 (vacuum valve 6a is again an atmospheric valve seat simultaneously) opens, and atmos-valve 6b closes; Make operation chamber 1b by the A mouth of vacuum valve seat 6c by vacuum communicating air flue 6d, pilot piping 9 (comprising rigid line 9a, flexible conduit 9b), electromagnetic valve 10 to the normally open valve door to the R mouth, vacuum adapter 1c connection vacuum chamber 1a, formation will be operated chamber 1b and will be communicated with vacuum source V and vacuum chamber 1a by the series connection gas circuit of operation chamber 1b to vacuum chamber 1a; The normal closed gate P mouth and the A mouth of electromagnetic valve 10 is connected between atmosphere N and the pilot piping 9 that operation chamber 1b is communicated with, with atmos-valve 6b formation atmosphere N to the 1b that operates chamber gas circuit in parallel; When control cock 6 is pushed into braking mode, or electromagnetic valve 10 is by current drives during to transformation condition, and vacuum source V and vacuum chamber 1a close to the gas circuit of operating chamber 1b, and operation chamber 1b is communicated with to the gas circuit of atmosphere N.
When automobile engine starting turns round, vacuum booster is by obtaining negative pressure with vacuum source V bonded assembly pipeline, when no automatic guidance braking needs, electromagnetic valve 10 no drive currents, operation chamber 1b is communicated with vacuum chamber 1a by electromagnetic valve 10 normally open valve doors, vacuum chamber 1a and operation chamber 1b equate that with vacuum source V air pressure booster piston 2 is in initial position under the effect of pull back spring 7, the action of brake push rod 8 no-outputs;
Automobile under steam, when navigating mate needs normal brake application, pedal brake power P acts on input bar 4 and promotes control cock 6, the vacuum valve 6a that drives in the control cock 6 closes, open atmos-valve 6b, atmosphere N enters operation chamber 1b through atmos-valve 6b, and booster piston 2 moves forward under the draught head effect; When keeping input bar 4 not move forward, booster piston 2 drives valve rod body 3 adjusting control valves 6, rests on current artificial pedal brake position, the suitable stroke of brake push rod 8 outputs, the braking force of promotion master brake cylinder M output appropriateness; When the cancellation glancing impact, pedal brake power P removes, control cock 6 is closed atmos-valve 6b under the effect of input return spring 5, open vacuum valve 6a, operation chamber 1b is communicated with vacuum chamber 1a by electromagnetic valve 10 normally open valve doors, vacuum chamber 1a and operation chamber 1b equate that with vacuum source V air pressure booster piston 2 drives brake push rod 8 and is in initial position again under the effect of pull back spring 7.
Automobile under steam, when navigating mate needs emergency braking, pedal brake power P acts on input bar 4 and promotes control cock 6, the vacuum valve 6a that drives in the control cock 6 closes, atmos-valve 6b opens, atmosphere N enters operation chamber 1b through atmos-valve 6b, booster piston 2 moves forward under the draught head effect, artificial pedal brake, make 2 reaches of input bar 4 follow-up booster pistons, booster piston 2 moves to the braking limit position, and brake push rod 8 output ranges promote master brake cylinder M output maximum braking force; When the cancellation glancing impact, pedal brake power P removes, control cock 6 is closed atmos-valve 6b under the effect of input return spring 5, open vacuum valve 6a, operation chamber 1b is communicated with vacuum chamber 1a by electromagnetic valve 10 normally open valve doors, vacuum chamber 1a and operation chamber 1b equate that with vacuum source V air pressure booster piston 2 drives brake push rod 8 and is in initial position again under the effect of pull back spring 7.
In the running car, when autonomous cruise speed system needs emergency braking, electromagnetic valve 10 obtains the drive current of autonomous cruise speed system and changes, electromagnetic valve 10 will be communicated with the normally open valve door of vacuum chamber 1a and operation chamber 1b and close, simultaneously atmosphere V is opened with the normal closed gate of operation chamber 1b, it is poor that the plenum chamber 1a of vacuum booster and operation chamber 1b form maximum gas pressure, booster piston 2 moves to the braking limit position under gas pressure, brake push rod 8 output ranges promote master brake cylinder M output maximum braking force; Remove when moving when getting, autonomous cruise speed system is closed electromagnetic valve 10 drive currents, electromagnetic valve 10 returns to the normally open valve door and opens, the initial condition that normal closed gate is closed, operation chamber 1b is communicated with vacuum chamber by the normally open valve door of electromagnetic valve 10, vacuum chamber 1a and operation chamber 1b equate that with vacuum source V air pressure booster piston 2 drives brake push rod 8 and is in initial position again under the effect of pull back spring 7.
In the running car, when autonomous cruise speed system as required during normal brake application, autonomous cruise speed system drives electromagnetic valve 10 in pulse duration modulation (PWM) mode, electromagnetic valve 10 control and regulation are communicated with the normally open valve door of vacuum chamber 1a and operation chamber 1b and close or open, simultaneously with the normal closed gate valve opening of atmosphere N and operation chamber 1b or close, make booster piston 2 rest on the position of certain appropriateness, brake push rod 8 promotes the braking force that master brake cylinder M output needs; Remove when moving when getting, autonomous cruise speed system is closed electromagnetic valve 10 drive currents, electromagnetic valve 10 returns to the normally open valve door and opens, the initial condition that normal closed gate is closed, operation chamber 1b is communicated with vacuum chamber by the normally open valve door of electromagnetic valve 10, vacuum chamber 1a and operation chamber 1b equate that with vacuum source V air pressure booster piston 2 drives brake push rod 8 and is in initial position again under the effect of pull back spring 7.
The present invention is not limited to the foregoing description, does not break away from the present invention under the situation of theme to carry out various variations.For example, among the embodiment 1, adopted two-position three way magnetic valve to realize the gas circuit translation function of electric control vacuum booster; If two-position three way magnetic valve is transformed into a two position two-way valve of often opening and a normally closed two position two-way valve, also can realize the automatically controlled gas circuit translation function of realization of electric control vacuum booster.
Claims (6)
1, electric control vacuum booster is characterized in that: electric control vacuum booster is made of vacuum booster, pilot piping, electromagnetic valve; Vacuum booster is made up of servo-unit housing, booster piston, valve rod body, input bar, input return spring, control cock, pull back spring, brake push rod; Booster piston is installed in the servo-unit housing, and servo-unit is divided into the operation chamber that the vacuum chamber that links to each other with vacuum source and pedal brake atmosphere enter; The front end of valve rod body is connected with booster piston, and stretch out outside the servo-unit housing from the operation chamber valve rod body rear end; Control cock is installed in the valve rod body, is connected with the input bar, and the vacuum valve of control cock is opened under the effect of input return spring, and atmos-valve cuts out; Vacuum valve forms the gas circuit of connecting through pilot piping with the normally open valve door of electromagnetic valve, will operate chamber and be communicated with vacuum source and vacuum chamber; The normal closed gate of electromagnetic valve is connected between atmosphere and the pilot piping that is communicated with of operation chamber, with atmos-valve formation atmosphere to the gas circuit in parallel of operating chamber; When control cock is pushed into braking mode, or electromagnetic valve is by current drives during to transformation condition, and vacuum source and vacuum chamber to the gas circuit of operating chamber is closed, and operation chamber to the gas circuit of atmosphere is communicated with.
2, electric control vacuum booster according to claim 1 is characterized in that: pilot piping comprises flexible conduit and rigid line.
3, electric control vacuum booster according to claim 1 is characterized in that: two-position three way magnetic valve is realized automatically controlled gas circuit translation function.
4, electric control vacuum booster according to claim 1 is characterized in that: a two-position two-way solenoid valve of often opening and a normally closed two-position two-way solenoid valve are realized automatically controlled gas circuit translation function.
5, the control method of the automatically controlled emergency braking of electric control vacuum booster according to claim 1, it is characterized in that: when the vacuum servo-unit by obtaining negative pressure with vacuum source bonded assembly pipeline, when no automatic guidance braking needs, electromagnetic valve does not have drive current, be communicated with vacuum chamber and be in normally open with the electromagnetic valve valve of operating chamber, make vacuum chamber and operation chamber equate with vacuum source air pressure, booster piston is in initial position under the effect of pull back spring, the action of brake push rod no-output;
Automobile under steam, when navigating mate needed normal brake application, the pedal brake masterpiece was used to import bar and promotes control cock, the vacuum valve that drives in the control cock cuts out, atmos-valve is opened, and atmosphere enters the operation chamber through atmos-valve, and booster piston drive brake push rod moves forward under the draught head effect; When keeping the input bar not move forward, booster piston drives valve rod body adjusting control valve, rests on current artificial pedal brake position, the stroke that brake push rod output is suitable, the braking force of promotion master brake cylinder output appropriateness; When the cancellation glancing impact, pedal brake power is removed, control cock is closed atmos-valve under the effect of input return spring, open vacuum valve, the operation chamber is often opened with vacuum chamber by the electromagnetic valve valve and is communicated with, vacuum chamber and operation chamber equate that with vacuum source air pressure booster piston drives brake push rod and is in initial position again under the effect of pull back spring;
Automobile under steam, when navigating mate needed emergency braking, the pedal brake masterpiece was used to import bar and promotes control cock, and the vacuum valve that drives in the control cock cuts out, atmos-valve is opened, atmosphere enters the operation chamber through atmos-valve, and booster piston moves forward under the draught head effect, artificial pedal brake, make the reach of input bar follow-up booster piston, booster piston moves to the braking limit position, and brake push rod output range promotes master brake cylinder output maximum braking force; When the cancellation glancing impact, pedal brake power is removed, control cock is closed atmos-valve under the effect of input return spring, open vacuum valve, the operation chamber is communicated with vacuum chamber by electromagnetic valve normally open valve door, vacuum chamber and operation chamber equate that with vacuum source air pressure booster piston drives brake push rod and is in initial position again under the effect of pull back spring;
In the running car, when autonomous cruise speed system needs emergency braking, electromagnetic valve obtains the drive current of autonomous cruise speed system and changes, electromagnetic valve will be communicated with the normally open valve door of operation chamber and vacuum chamber and close, to connect atmosphere simultaneously opens with the normal closed gate of operation chamber, it is poor that the vacuum chamber of vacuum booster and operation chamber form maximum gas pressure, booster piston moves to the braking limit position under the draught head effect, brake push rod output range promotes master brake cylinder output maximum braking force; When the needs brake off, autonomous cruise speed system is closed electromagnetic valve driving current, electromagnetic valve returns to the normally open valve door and opens, the initial condition that normal closed gate is closed, the operation chamber is communicated with vacuum chamber by the normally open valve door of electromagnetic valve, vacuum chamber and operation chamber equate that with vacuum source air pressure booster piston drives brake push rod and is in initial position again under the effect of pull back spring.
6, the control method of the automatically controlled emergency braking of electric control vacuum booster according to claim 5, it is characterized in that: in the running car, when autonomous cruise speed system as required during normal brake application, autonomous cruise speed system drives electromagnetic valve in pulse duration modulation (PWM) mode, solenoid control is regulated the normally open valve door that is communicated with vacuum chamber and is closed or open, simultaneously the atmosphere and the normal closed gate of operation chamber are opened or closed, make booster piston rest on certain appropriate position, brake push rod promotes the braking force that master brake cylinder output needs; When the needs brake off, autonomous cruise speed system is closed electromagnetic valve driving current, electromagnetic valve returns to the normally open valve door and opens, the initial condition that normal closed gate is closed, the operation chamber is often opened with vacuum chamber by the electromagnetic valve valve and is communicated with, vacuum chamber and operation chamber equate that with vacuum source air pressure booster piston is in initial position again under the effect of pull back spring.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006100323874A CN100554052C (en) | 2006-10-11 | 2006-10-11 | Electric control vacuum booster and control method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006100323874A CN100554052C (en) | 2006-10-11 | 2006-10-11 | Electric control vacuum booster and control method |
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| Publication Number | Publication Date |
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| CN101161522A CN101161522A (en) | 2008-04-16 |
| CN100554052C true CN100554052C (en) | 2009-10-28 |
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| Application Number | Title | Priority Date | Filing Date |
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| CNB2006100323874A Expired - Fee Related CN100554052C (en) | 2006-10-11 | 2006-10-11 | Electric control vacuum booster and control method |
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Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101574963B (en) * | 2008-05-09 | 2013-08-14 | 浙江吉利汽车研究院有限公司 | Tire burst braking system capable of adjusting brake force |
| CN101574968B (en) * | 2008-05-09 | 2013-02-20 | 浙江吉利汽车研究院有限公司 | Controllable vacuum booster |
| CN101590827B (en) * | 2008-05-29 | 2012-09-05 | 浙江吉利汽车研究院有限公司 | Flat tire braking system |
| CN102717790B (en) * | 2012-06-14 | 2015-04-08 | 浙江师范大学 | Electrical control vacuum booster |
| CN106167009A (en) * | 2016-07-18 | 2016-11-30 | 北汽福田汽车股份有限公司 | Upward slope auxiliary body and there is its automobile |
| CN107200003A (en) * | 2017-05-23 | 2017-09-26 | 杨华军 | Hydraulic braking system for automobile |
| CN107310541A (en) * | 2017-06-22 | 2017-11-03 | 重庆大学 | A kind of modified servo vacuum booster device |
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2006
- 2006-10-11 CN CNB2006100323874A patent/CN100554052C/en not_active Expired - Fee Related
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| CN101161522A (en) | 2008-04-16 |
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