CN104458284B - Automobile braking system based on ESC system and testing method of automobile braking system - Google Patents
Automobile braking system based on ESC system and testing method of automobile braking system Download PDFInfo
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- CN104458284B CN104458284B CN201410850628.0A CN201410850628A CN104458284B CN 104458284 B CN104458284 B CN 104458284B CN 201410850628 A CN201410850628 A CN 201410850628A CN 104458284 B CN104458284 B CN 104458284B
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Abstract
The invention discloses an automobile braking system based on an ESC system and a testing method of the automobile braking system. Through ESC program control, after an ECU is powered on, system initialization is conducted, a preset control command is sent to the ECU, a voltage regulating electromagnetic valve, a normally-closed electromagnetic valve and a normally-open electromagnetic valve are matched for work, and then the active pressurization function is achieved. By the adoption of the technical scheme, through connection to a CAN and computer program control, cost is hardly increased for an automobile with the ESC system, work efficiency and accuracy of the test result are greatly improved, a tester does not need to tread on a brake pedal, and the workload and the work intensity of the tester are reduced; so that the testing cost is greatly reduced.
Description
Technical field
The invention belongs to the technical field of automobile making, it is related to the experimental test technology of brake system of car, more specifically
Say, the present invention relates to a kind of brake system of car based on esc.In addition, the invention still further relates to the test of described brakes is surveyed
Method for testing.
Background technology
According to the regulation of GB gb12676-1999 " brake system of car properity and test method ", in o type, type
In type test:
1st, the benchmark pedal force having definite value to brake pedal force requires；
2nd, require pedal force effect rapid, keep stable in braking procedure；
3rd, the pedal force of multiple test is required to be consistent.
According to requirements above, prior art, when carrying out real vehicle braking o type, type and type test, typically fills in real vehicle
Upper pedal force sensor, and treaded the pedal force of test requirements document by feel by veteran testing crew.
The prior art adopting at this stage has disadvantages that: success rate is relatively low；Test concordance it cannot be guaranteed that, thus leading to
Result of the test error is larger；Meanwhile, also very high to the skill requirement of testing crew；The labor intensity of testing crew is high, work
Amount is big, whole efficiency is relatively low.
Content of the invention
The present invention provides a kind of brake system of car Ji Yu esc (electronic stability controlling system), its objective is to improve
Experimental test work efficiency and the accuracy of result of the test.
To achieve these goals, the technical scheme that the present invention takes is:
The brake system of car based on esc of the present invention, including master cylinder mc1, master cylinder mc2, master cylinder pressure sensor；Also wrap
Include four wheel cylinders, i.e. the wheel cylinder of the near front wheel, off hind wheel, left rear wheel and off-front wheel；
The hydraulic circuit of described brake system of car includes two tunnel supervisors being connected respectively with described master cylinder mc1, master cylinder mc2
Road: first via main line leads to the near front wheel, off hind wheel, the second road main line leads to left rear wheel, off-front wheel；
Wherein:
First via main line connects the pressure regulation electromagnetism in first via main line from master cylinder mc1 through master cylinder pressure sensor
Valve；Then it is divided into two pipelines it may be assumed that the near front wheel pipeline and off hind wheel pipeline；
The near front wheel pipeline connects one of first via main line normally open solenoid valve, is then divided into two tunnels: a road connects left
Front-wheel wheel cylinder, another road connects one of first via main line normally closed solenoid valve；
Off hind wheel pipeline connects another normally open solenoid valve in first via main line, is then divided into two tunnels, and a road connects
Off hind wheel wheel cylinder, another road connects another normally closed solenoid valve in first via main line；
Normally closed solenoid valve in this two first via main lines is connected with the low-voltage memory in first via main line respectively；
This low-voltage memory is divided into two tunnels again, and confession solenoid in first via main line for the road leads to master cylinder mc1,
Pressure regulating solenoid valve in described first via main line and left front is connected after separately leading up to the plunger displacement pump in first via main line
Wheel, the wheel cylinder of off hind wheel；
Second road main line connects the pressure regulating solenoid valve the second road main line from master cylinder mc2；Then it is divided into two pipelines,
That is: left rear wheel pipeline and off-front wheel pipeline；
Left rear wheel pipeline connects one of the second road main line normally open solenoid valve, is then divided into two tunnels, and a road connects left
Trailing wheel wheel cylinder, another road connects one of the second road main line normally closed solenoid valve；
Off-front wheel pipeline connects another normally open solenoid valve in the second road main line, is then divided into two tunnels, and a road connects
Off-front wheel wheel cylinder, another road connects another normally closed solenoid valve in the second road main line；
Normally closed solenoid valve in this two the second road main lines is connected with the low-voltage memory in the second road main line respectively；
This low-voltage memory is divided into two tunnels again, and confession solenoid in the second road main line for the road leads to master cylinder mc2,
Pressure regulating solenoid valve in the second described road main line and left back is connected after separately leading up to the plunger displacement pump in the second road main line
Wheel, the wheel cylinder of off-front wheel；
Wherein, the power of the plunger displacement pump in the plunger displacement pump in first via main line and the second road main line is by hydraulic motor
There is provided.
In order to realize and technique scheme identical goal of the invention, present invention also offers above-described based on esc
Brake system of car testing method, its technical scheme is:
1st, brake pedal force fp and loine pressure pm have functional relation fp=f (pm)；
First, using pedal force sensor and master cylinder pressure sensor, carry out necessarily in interval different pedal force fp obtain
The test of loine pressure pm, and gather test data, draw brake pedal force and loine pressure graph of relation；
2nd, the pressure regulating solenoid valve in the pressure regulating solenoid valve in first via main line and the second road main line adopts pwm dutycycle
Control；When the dutycycle of pwm is definite value, pressure regulator valve can maintain pressure p o of a definite value；When pressure is more than po, unnecessary
Pressure can be overflowed so that its pressure maintains po always by pressure regulator valve, its maintain pressure p o and energising dutycycle
τ has functional relation po=f (τ), and this functional relationship is pressure regulation valve characteristic；It is also possible to draw po and τ by testing gathered data
Graph of relation；
3rd, the requirement according to test standard, obtains pedal force fp, according to brake pedal force and loine pressure graph of relation
Brake pedal force and loine pressure relation, obtain corresponding loine pressure pm of pedal force fp of test requirements document；Pressure regulating solenoid valve
Open pressure p o=pm, default dutycycle τ of pressure regulating solenoid valve can be obtained according to formula po=f (τ).
The process of this testing method is:
To the energising of esc electronic unit, runtime control program；
Default control instruction is sent by electronic control unit, make confession solenoid in first via main line, second
Fuel feeding solenoid valves in the main line of road are opened；
Hydraulic motor is energized, and starts working, and drives the plunger displacement pump in first via main line, the post in the second road main line
Plug pump work；
Meanwhile, the pressure regulating solenoid valve in first via main line, the pressure regulating solenoid valve in the second road main line are according to default electricity
The energising of magnet valve numerical value is closed；
The drive of the plunger displacement pump in the plunger displacement pump in first via main line, the second road main line respectively of the brake fluid in oil circuit
Under dynamic, extract from master cylinder mc1, mc2, respectively through the confession in the confession solenoid in first via main line, the second road main line
Solenoid, then through two normally open solenoid valves in first via main line, two normally open solenoid valves in the second road main line,
It is driven into four wheel cylinders；
When in oil circuit, pressure is more than the po of the pressure regulating solenoid valve of systemic presupposition, brake fluid is overflowed by pressure regulating solenoid valve, pipe
Road inside brake liquor stream returns master cylinder mc1, mc2 so that pipeline inner pressure keeps preset pressure po.
The present invention adopts technique scheme, based on esc (electronic stability controlling system), connects can network and passes through
Computer program controls, and the vehicle for equipment esc hardly increases cost, greatly improves work efficiency and the examination of experimental test
Test the degree of accuracy of result；Simultaneously it is not necessary to testing crew steps on brake pedal, the workload and the work that reduce testing crew are strong
Degree；Therefore, greatly reduce experimentation cost.
Brief description
The labelling of content shown in accompanying drawing and in figure is as follows:
Fig. 1 is the brakes schematic diagram of the present invention；
Fig. 2 is brake pedal force and the loine pressure graph of relation of the present invention；
Fig. 3 is the brake oil flow schematic diagram under experimental test state of the present invention；
Fig. 4 is the electronic control unit control flow chart of the present invention.
In figure is labeled as:
1st, normally open solenoid valve, 2, normally closed solenoid valve, 3, low-voltage memory, 4, normally closed solenoid valve, 5, normally open solenoid valve, 6, post
Plug pump, 7, pressure regulating solenoid valve, 8, supply solenoid (repairing electromagnetic valve), 9, master cylinder pressure sensor, 10, hydraulic motor, 11, adjust
Pressure electromagnetic valve, 12, plunger displacement pump, 13, supply solenoid, 14, normally open solenoid valve, 15, low-voltage memory, 16, normally open solenoid valve,
17th, normally closed solenoid valve, 18, normally closed solenoid valve.
Specific embodiment
Below against accompanying drawing, by the description to embodiment, the specific embodiment of the present invention is made further details of
Illustrate, to help those skilled in the art to have more complete, accurate and deep reason to the inventive concept of the present invention, technical scheme
Solution.
The structure of the present invention as expressed by Fig. 1, for a kind of automobile brake Ji Yu esc (electronic stability controlling system)
System, including master cylinder mc1, master cylinder mc2, master cylinder pressure sensor 9；Also include four wheel cylinders, i.e. the near front wheel, off hind wheel, left back
Wheel and the wheel cylinder of off-front wheel.
In order to solve the problems, such as prior art and overcome its defect, realize improving experimental test work efficiency and test
The goal of the invention of the accuracy of result, the technical scheme that the present invention takes is:
As shown in figure 1, the brake system of car based on esc of the present invention, it is (i.e. left front, right that equipment esc adopts x type to arrange
Afterwards with left back, right front two-way cross-over control) brake fluid system esc hydraulic module oil channel structures, its hydraulic circuit bag
Include two road main lines being connected respectively with described master cylinder mc1, master cylinder mc2: first via main line leads to the near front wheel, off hind wheel, the
Two road main lines lead to left rear wheel, off-front wheel；
Wherein:
First via main line connects pressure regulating solenoid valve 7 from master cylinder mc1 through master cylinder pressure sensor 9；Then it is divided into two
Pipeline is it may be assumed that the near front wheel pipeline and off hind wheel pipeline；
The near front wheel pipeline connects normally open solenoid valve 1, is then divided into two tunnels: a road connects the near front wheel wheel cylinder, another road connects
Normally closed solenoid valve 2；
Off hind wheel pipeline connects normally open solenoid valve 5, is then divided into two tunnels, and a road connects off hind wheel wheel cylinder, and another road connects
Normally closed solenoid valve 4；
Normally closed solenoid valve 2, normally closed solenoid valve 4 are connected with low-voltage memory 3 (lpa) respectively；
This low-voltage memory 3 is divided into two tunnels again, and a road, through leading to master cylinder mc1 for solenoid 8, separately leads up to plunger
The wheel cylinder of pressure regulating solenoid valve 7 and the near front wheel, off hind wheel is connected after pump 6；
Second road main line connects pressure regulating solenoid valve 11 from master cylinder mc2；Then it is divided into two pipelines it may be assumed that left rear wheel pipeline
With off-front wheel pipeline；
Left rear wheel pipeline connects normally open solenoid valve 14, is then divided into two tunnels, and a road connects left rear wheel wheel cylinder, and another road connects
Normally closed solenoid valve 17；
Off-front wheel pipeline connects normally open solenoid valve 16, is then divided into two tunnels, and a road connects off-front wheel wheel cylinder, and another road connects
Normally closed solenoid valve 18；
Normally closed solenoid valve 17, normally closed solenoid valve 18 are connected with low-voltage memory 15 (lpa) respectively；
This low-voltage memory 15 is divided into two tunnels again, and a road, through leading to master cylinder mc2 for solenoid 13, separately leads up to post
The wheel cylinder of pressure regulating solenoid valve 11 and left rear wheel, off-front wheel is connected after plug pump 12；
Wherein, the power of plunger displacement pump 6 and plunger displacement pump 12 is provided by hydraulic motor 10.
Normally open solenoid valve 1, normally open solenoid valve 5, pressure regulating solenoid valve, pressure regulating solenoid valve 11, normally open solenoid valve 14 and normally opened electricity
Magnet valve is magnetic-pulse controlled electromagnetic valve, and the size of its aperture is controlled by the empty ratio of point of electromagnetic pulse.
Low-voltage memory 3 and low-voltage memory 15 are the storage organization of brake fluid.
Electronic control unit control flow chart, as shown in figure 4, being energized to electronic control unit after starting, carries out necessary system
System initialization prepares, and then allowing electronic control unit send default control instruction, to enter line program to electromagnetic valve and motor default
Action.
It passes through esc programme-control, after electronic control unit ecu energising, carries out system initialization, ecu is sent pre-
If control instruction, allow pressure regulating solenoid valve, normally closed solenoid valve cooperating, complete active pressurization function.
In order to realize and technique scheme identical goal of the invention, present invention also offers above-described based on esc
Brake system of car testing method, its technical scheme is:
1st, brake pedal force fp and loine pressure pm have functional relation fp=f (pm)；(as shown in Figure 2).
Firstly, it is necessary to use pedal force sensor and master cylinder pressure sensor 9 (esc module is original), carry out certain interval
Interior difference pedal force fp obtains the test of loine pressure pm, and gathers test data, draws the brake pedal force as Fig. 2 and pipeline
Pressure relationship plot figure；
2nd, pressure regulating solenoid valve 7 and pressure regulating solenoid valve 11 adopt electromagnetic pulse Duty ratio control (pwm)；This two electricity after energising
Can maintain the loine pressure of definite value, dutycycle τ of pressure p o that it keeps and energising has functional relation po=f magnet valve
(τ)；It is also possible to draw po and τ graph of relation by testing gathered data；
3rd, the requirement according to test standard, obtains pedal force fp, according to brake pedal force as shown in Figure 2 and loine pressure
The brake pedal force of graph of relation and loine pressure relation, obtain loine pressure pm of test requirements document, and pressure regulating solenoid valve is opened
Pressure p o=pm, can obtain default dutycycle τ of pressure regulating solenoid valve according to formula po=f τ.
After on-test, system controls referring to Fig. 4, i.e. System Working Principle figure.
The process of this testing method is:
To the energising of esc electronic unit, runtime control program；
Default control instruction is sent by electronic control unit, makes to beat for solenoid 8, for solenoid 13 energising
Open；
As shown in figure 3, the pipeline that wherein heavy black flows for brake fluid；
Hydraulic motor 10 is energized, and starts working, and drives plunger displacement pump 6, plunger displacement pump 12 to work；
Meanwhile, pressure regulating solenoid valve 7, pressure regulating solenoid valve 11 are energized according to pre-given electromagnetic valve numerical value and close；
Brake fluid in oil circuit, respectively under plunger displacement pump 6, the driving of plunger displacement pump 12, extracts from master cylinder mc1, mc2, warp respectively
Cross for solenoid 8, supply solenoid 13, then through normally open solenoid valve 1, normally open solenoid valve 5, normally open solenoid valve 14, normally opened electricity
Magnet valve 16, is driven into four wheel cylinders；
When in oil circuit, pressure is more than pressure p o of the pressure regulating solenoid valve 7 of systemic presupposition, the protection of pressure regulating solenoid valve 11, braking
Liquid passes through pressure regulating solenoid valve 7, pressure regulating solenoid valve 11 and overflows, and pipeline inside brake liquor stream returns master cylinder mc1, mc2 so that pipeline inner pressure
Keep preset pressure po.
Above in conjunction with accompanying drawing, the present invention is exemplarily described it is clear that the present invention implements is not subject to aforesaid way
Restriction, as long as employing the improvement of various unsubstantialities that method of the present invention design and technical scheme are carried out, or without changing
Enter and the design of the present invention and technical scheme are directly applied to other occasions, all within protection scope of the present invention.
Claims (2)
1. a kind of testing method of the brake system of car based on esc, described brake system of car include master cylinder mc1,
Master cylinder mc2, master cylinder pressure sensor (9)；Also include four wheel cylinders, i.e. the wheel of the near front wheel, off hind wheel, left rear wheel and off-front wheel
Cylinder；
The hydraulic circuit of described brake system of car includes two road main lines being connected respectively with described master cylinder mc1, master cylinder mc2:
First via main line leads to the near front wheel, off hind wheel, and the second road main line leads to left rear wheel, off-front wheel；
Wherein:
First via main line connects the pressure regulating solenoid valve in first via main line from master cylinder mc1 through master cylinder pressure sensor (9)
(7)；Then it is divided into two pipelines it may be assumed that the near front wheel pipeline and off hind wheel pipeline；
The near front wheel pipeline connects one of first via main line normally open solenoid valve (1), is then divided into two tunnels: a road connects left front
Wheel wheel cylinder, another road connects one of first via main line normally closed solenoid valve (2)；
Off hind wheel pipeline connects another normally open solenoid valve (5) in first via main line, is then divided into two tunnels, and a road connects right
Trailing wheel wheel cylinder, another road connects another normally closed solenoid valve (4) in first via main line；
Normally closed solenoid valve (2,4) in this two first via main lines respectively with first via main line in low-voltage memory (3)
Connect；
This low-voltage memory (3) is divided into two tunnels again, and confession solenoid (8) in first via main line for the road leads to master cylinder
Mc1, separately leads up to the plunger displacement pump in first via main line (6) and connects the pressure regulating solenoid valve in described first via main line afterwards
(7) and the near front wheel, off hind wheel wheel cylinder；
Second road main line connects the pressure regulating solenoid valve (11) the second road main line from master cylinder mc2；Then it is divided into two pipelines,
That is: left rear wheel pipeline and off-front wheel pipeline；
Left rear wheel pipeline connects one of the second road main line normally open solenoid valve (14), is then divided into two tunnels, and a road connects left
Trailing wheel wheel cylinder, another road connects one of the second road main line normally closed solenoid valve (17)；
Off-front wheel pipeline connects another normally open solenoid valve (16) in the second road main line, is then divided into two tunnels, and a road connects
Off-front wheel wheel cylinder, another road connects another normally closed solenoid valve (18) in the second road main line；
Normally closed solenoid valve (17,18) in this two the second road main lines respectively with the second road main line in low-voltage memory
(15) connect；
This low-voltage memory (15) is divided into two tunnels again, and confession solenoid (13) in the second road main line for the road leads to master cylinder
Mc2, separately leads up to the plunger displacement pump (12) in the second road main line and connects the pressure regulation electromagnetism in the second described road main line afterwards
Valve (11) and the wheel cylinder of left rear wheel, off-front wheel；
Wherein, the power of the plunger displacement pump (12) in the plunger displacement pump (6) and the second road main line in first via main line is by hydraulic pressure
Motor (10) provides；
It is characterized in that the testing method of the described brake system of car based on esc is:
1), brake pedal force fp and loine pressure pm have functional relation fp=f (pm)；
First, using pedal force sensor and master cylinder pressure sensor (9), carry out necessarily in interval different pedal force fp managed
The test of road pressure p m, and gather test data, draw brake pedal force and loine pressure graph of relation；
2), the pressure regulating solenoid valve (11) in the pressure regulating solenoid valve (7) and the second road main line in first via main line is accounted for using pwm
Empty ratio controls；When the dutycycle of pwm is definite value, pressure regulator valve can maintain pressure p o of a definite value；When pressure is more than po,
Unnecessary pressure can be overflowed by pressure regulator valve so that its pressure maintains po always, and pressure p o that it maintains accounts for energising
Empty have functional relation po=f (τ) than τ, this functional relationship is pressure regulation valve characteristic；It is also possible to be drawn by testing gathered data
Po and τ graph of relation；
3), the requirement according to test standard, obtains pedal force fp, according to the system of brake pedal force and loine pressure graph of relation
Dynamic pedal force and loine pressure relation, obtain corresponding loine pressure pm of pedal force fp of test requirements document；Pressure regulating solenoid valve is opened
Pressure p o=pm, can obtain default dutycycle τ of pressure regulating solenoid valve according to formula po=f (τ).
2. according to the brake system of car based on esc described in claim 1 testing method it is characterised in that:
To the energising of esc electronic unit, runtime control program；
Default control instruction is sent by electronic control unit, makes confession solenoid (8) in first via main line, the second tunnel
Confession solenoid (13) energising in main line is opened；
Hydraulic motor (10) is energized, and starts working, and drives in plunger displacement pump (6) in first via main line, the second road main line
Plunger displacement pump (12) work；
Meanwhile, the pressure regulating solenoid valve (7) in first via main line, the pressure regulating solenoid valve (11) in the second road main line are according to default
The energising of electromagnetic valve numerical value is closed；
Brake fluid in oil circuit is respectively in the plunger displacement pump (6) in first via main line, the plunger displacement pump (12) in the second road main line
Driving under, from master cylinder mc1, mc2 extract, respectively through the confession solenoid (8) in first via main line, the second road main line
In confession solenoid (13), then in two normally open solenoid valves (1,5) in first via main line, the second road main line
Two normally open solenoid valves (14,16), are driven into four wheel cylinders；
When in oil circuit, pressure is more than the po of the pressure regulating solenoid valve of systemic presupposition, brake fluid is overflowed by pressure regulating solenoid valve, in pipeline
Brake fluid flows back to master cylinder mc1, mc2 so that pipeline inner pressure keeps preset pressure po.
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| CN201410850628.0A CN104458284B (en) | 2014-12-31 | 2014-12-31 | Automobile braking system based on ESC system and testing method of automobile braking system |
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| CN201410850628.0A CN104458284B (en) | 2014-12-31 | 2014-12-31 | Automobile braking system based on ESC system and testing method of automobile braking system |
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Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105070180A (en) * | 2015-07-15 | 2015-11-18 | 无锡商业职业技术学院 | Automobile hydraulic brake system experimental device |
| CN106292333A (en) * | 2016-09-13 | 2017-01-04 | 浙江吉利控股集团有限公司 | ESC hardware-in-the-loop test system and ESC hardware-in-the-loop test method |
| CN110779696A (en) * | 2019-10-17 | 2020-02-11 | 浙江亚太机电股份有限公司 | Integrated brake system detection table and test method |
| CN111137265B (en) * | 2020-01-02 | 2021-03-16 | 佛山市一为制动技术有限公司 | Vehicle brake boosting system, control method and device |
| CN113551921B (en) * | 2021-07-20 | 2023-03-24 | 招商局检测车辆技术研究院有限公司 | Vehicle ESC performance evaluation method |
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