CN106627553B - Pneumatic brake exception detecting method and its system - Google Patents
Pneumatic brake exception detecting method and its system Download PDFInfo
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- CN106627553B CN106627553B CN201510717069.0A CN201510717069A CN106627553B CN 106627553 B CN106627553 B CN 106627553B CN 201510717069 A CN201510717069 A CN 201510717069A CN 106627553 B CN106627553 B CN 106627553B
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
- B60T17/00—Component parts, details, or accessories of power brake systems not covered by groups B60T8/00, B60T13/00 or B60T15/00, or presenting other characteristic features
- B60T17/18—Safety devices; Monitoring
- B60T17/22—Devices for monitoring or checking brake systems; Signal devices
- B60T17/221—Procedure or apparatus for checking or keeping in a correct functioning condition of brake systems
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
- B60T17/00—Component parts, details, or accessories of power brake systems not covered by groups B60T8/00, B60T13/00 or B60T15/00, or presenting other characteristic features
- B60T17/02—Arrangements of pumps or compressors, or control devices therefor
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
- B60T8/00—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force
- B60T8/32—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force responsive to a speed condition, e.g. acceleration or deceleration
- B60T8/88—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force responsive to a speed condition, e.g. acceleration or deceleration with failure responsive means, i.e. means for detecting and indicating faulty operation of the speed responsive control means
- B60T8/885—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force responsive to a speed condition, e.g. acceleration or deceleration with failure responsive means, i.e. means for detecting and indicating faulty operation of the speed responsive control means using electrical circuitry
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
- B60T2270/00—Further aspects of brake control systems not otherwise provided for
- B60T2270/40—Failsafe aspects of brake control systems
- B60T2270/403—Brake circuit failure
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
- B60T2270/00—Further aspects of brake control systems not otherwise provided for
- B60T2270/40—Failsafe aspects of brake control systems
- B60T2270/406—Test-mode; Self-diagnosis
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- Engineering & Computer Science (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Regulating Braking Force (AREA)
Abstract
The present invention provides a kind of pneumatic brake exception detecting method and its system.Pneumatic brake exception detecting method comprises the steps of: a pressure abnormity judgment step, one brake pedal stroke of detecting, a wheel cylinder pressure and a pneumatic supply pressure, and one first abnormal signal is issued after contrast judgement exception.One film exception judgment step carries out one and stays braking detective, and to issue one second abnormal signal after open/close states in brake and wheel cylinder pressure contrast judgement exception.And one redundant estimate step, in conjunction with judge judging automatically and estimating for progress redundant starting after first abnormal signal, second abnormal signal and a speed.Whereby, it is abnormal can clearly to judge brake for pneumatic brake exception detecting method, and the starting for carrying out redundant mechanism early and the troubleshooting before accident.
Description
Technical field
The present invention relates to a kind of braking detective system and method for detecting, particularly, be can be pre-actuated about one kind it is standby
Help or carry out the pneumatic brake exception detecting method and its system of troubleshooting.
Background technique
Increasingly complicated environment has only been unable to cope with the reaction of vehicle driver now, thus driver personal is anti-
Should be able to the good of power corrupt will substantially influence traffic safety.Wherein brake and drive system for vehicle with tow for traffic safety be most important system it
One, auxiliary vehicle driver has largely been developed to increase the brake assist system of traffic safety.However these brake now
Prompting drives power-off, using the design for staying brake or interruption power when auxiliary system is mostly used to provide brake failure.But for
The pressure abnormity occurred between vehicle driving does not provide enough research and development.
The pressure abnormity occurred between aforementioned vehicle traveling is the brake failure of most of lorries, truck or oversize vehicle now
Unexpected main cause.In the past known technology in the market be all detect pressure in storage cylinder as unique pneumatic brake judge because
Son, and redundant scheme is only the pneumatic supply for increasing auxiliary, such as TaiWan, China patent I1312324 case.Also increase brake steps on
The brake abnormity detecting technology of the assessment of plate strength and the pressure integration in storage cylinder, such as United States Patent (USP) US7216552B2 case.
But for actual vehicle drive, simple pneumatic supply and brake pedal and can not accurately judge be front axle brake or after
Axis brake will generate failure situation, also enable subsequent driving emergency brake movement mistake frequent occurrence, not only result in Pneumatic brake
The emergency brake of vehicle once again failure or reaction it is too late, also common driving emergency brake mode mistake and lorry roll-over accident occurs.
Although however, it is aforementioned commonly use in have a redundant mode, increase the mode in assist gas pressure source pole in extreme situations
It is vulnerable, such as when speed is too fast or excessively close with leading vehicle distance, it, will because of assist gas pressure source Initiated Mechanism or the difference of installation position
Can not immediate reaction lead to not slow down speed or actuated vehicle self-actuating brake immediately to normal danger, thus still result in and touch
Hit generation.
In addition, above-mentioned problem specifically occur in auxiliary brake system especially can only be in the system of simple alerting drivers.One
As under driver is insufficient in information and reaction is too late situation, be unable to fully solve the situation of brake failure at all.Therefore, manufacturer
Still it is eager to seek to deal with the pneumatic brake abnormity detecting system of various pneumatic brake fault state comprehensively, more expects phase occur
The brake standby system of pass, is effectively reduced that oversize vehicle pneumatic brake is not normal or the situation of auxiliary brake baulk.
Summary of the invention
According to upper, the present invention provides a pneumatic brake abnormity detecting system, is integrated with pedal travel, wheel cylinder air pressure detecting, storage
Gas cell pressure and detecting in brake, then accurate abnormal signal is obtained after comparing with abnormal decision circuitry, whereby not
But the fault state that can accurately judge brake, more can effectively analyze preferable debugging mode.
In order to achieve the above object, it is to include that the present invention, which provides a pneumatic brake abnormity detecting system, in an embodiment
One pedal travel detector, a front axle wheel cylinder air pressure detector, a rear axle wheel cylinder air pressure detector, a gas storage unit pressure detection
The abnormal decision circuitry of device, a detector in brake control valve and one.Pedal travel detector connects a brake pedal with defeated outward
A pedal travel signal out.Front axle wheel cylinder air pressure detector is then connection one front axle brake to export a front axle wheel cylinder pressure outward
Signal.Rear axle wheel cylinder air pressure detector is one rear shaft braking of connection to export a rear axle wheel cylinder pressure signal outward.And gas storage list
First pressure detection device is one gas storage unit of connection to export a gas storage unit pressure signal outward.Separately there is detecting in brake control valve
Device connection one stays brake and stays brake control signal to export one outward.And with abnormal decision circuitry connection pedal travel detector,
Front axle wheel cylinder air pressure detector, rear axle wheel cylinder air pressure detector, gas storage unit pressure detection device and detector in brake control valve,
And abnormal decision circuitry obtains pedal travel signal, front axle wheel cylinder pressure signal, rear axle wheel cylinder pressure signal, gas storage unit pressure
Signal and stay brake control signal.Wherein, abnormal decision circuitry with pedal travel signal fusing front axle wheel cylinder pressure signal or after
One first abnormal signal of judgement output after axis wheel cylinder pressure signal；And abnormal decision circuitry is with the rear axle of comparison in brake control signal
One second abnormal signal of judgement output after wheel cylinder pressure signal.
In pneumatic brake abnormity detecting system above-mentioned, abnormal decision circuitry can be electronic control unit ECU
(Electronic Control Unit) directly grasps the movement of various auxiliary brakes and device on control vehicle using ECU.
It can also include a quick release valve and a relay valve in pneumatic brake abnormity detecting system above-mentioned.Quick release valve air pressure
It is connected between brake pedal and front axle brake, and front axle wheel cylinder air pressure detector air pressure is connected to quick release valve and the front axle brakes
Between；Relay valve is then that air pressure is connected between gas storage unit, brake pedal and rear shaft braking, and rear axle wheel cylinder air pressure detector
Air pressure is connected between relay valve and rear shaft braking.
In another embodiment, the present invention provides a pneumatic brake exception detecting method, and step includes: an air pressure is different
Normal judgment step and a film exception judgment step.Pressure abnormity judgment step is one brake pedal stroke of detecting, a brake point
Pump pressure and a pneumatic supply pressure, and one first abnormal signal is issued after contrast judgement exception.And film exception judgment step
It is one detecting in brake control valve of progress, and to be issued after open/close states in brake and wheel cylinder pressure contrast judgement exception
One second abnormal signal.By the judging result of aforementioned first abnormal signal and the second abnormal signal, drive not only available
Accurate abnormal signal more can accurately judge the fault state of different brakes whereby, more can effectively analyze preferable exclusion
Failure mode.
In pneumatic brake exception detecting method above-mentioned, redundant estimation (stand-by can also be performed
Estimation) step, redundant estimation step combine judge to carry out after the first abnormal signal, the second abnormal signal and a speed it is standby
Help judging automatically and estimating for starting.Judgement knot is estimated plus speed by aforementioned first abnormal signal and the second abnormal signal
After fruit, the movement of more correct auxiliary brake method or emergency brake can analyze.
Can have an alert stage by pneumatic brake exception detecting method above-mentioned, alert stage, which combines, judges first
Audio, light or vibration warning are carried out after abnormal signal, the second abnormal signal and a speed.
In addition, a further embodiment of the present invention provides a pneumatic brake abnormity detecting system, be not only integrated with pedal travel,
Wheel cylinder air pressure detecting, gas storage unit pressure and detecting in brake control signal have been also equipped with a redundant module and have carried out auxiliary brake.
Accurate abnormal signal is obtained after not only comparing whereby with abnormal decision circuitry, and the redundant module that can arrange in pairs or groups directly excludes
Brake failure.
In order to achieve the above object, the present invention provides a pneumatic brake abnormity detecting system in a further embodiment, it is packet
It is detectd containing a pedal travel detector, a front axle wheel cylinder air pressure detector, a rear axle wheel cylinder air pressure detector, a gas storage unit pressure
Survey device, a detector in brake control valve, an abnormal decision circuitry and a redundant module.One brake of pedal travel detector connection
Pedal to export a pedal travel signal outward.Front axle wheel cylinder air pressure detector is then connection one front axle brake to export one outward
Front axle wheel cylinder pressure signal.Rear axle wheel cylinder air pressure detector is one rear shaft braking of connection to export rear axle wheel cylinder pressure letter outward
Number.And gas storage unit pressure detection device is one gas storage unit of connection to export a gas storage unit pressure signal outward.Separately have to stay and stop
Vehicle control valve detector connection one stays brake and stays brake control signal to export one outward.And pedal is connected with abnormal decision circuitry
Stroke detector, front axle wheel cylinder air pressure detector, rear axle wheel cylinder air pressure detector, gas storage unit pressure detection device and control in brake
Valve detector processed, and abnormal decision circuitry obtain pedal travel signal, front axle wheel cylinder pressure signal, rear axle wheel cylinder pressure signal,
Gas storage unit pressure signal and stay brake control signal.Wherein, abnormal decision circuitry is with pedal travel signal fusing front axle wheel cylinder
One first abnormal signal of judgement output after pressure signal or rear axle wheel cylinder pressure signal；And abnormal decision circuitry is with control in brake
One second abnormal signal of judgement output after signal fusing rear axle wheel cylinder pressure signal.Finally, redundant module receives abnormal judgement electricity
Controlled progress redundant brake after the first abnormal signal or the second abnormal signal of road transmitting.
In pneumatic brake abnormity detecting system above-mentioned, redundant module number can be multiple, and redundant module can be
It connects front axle brake, rear shaft braking or stays in brake.Redundant module number can be three, and three redundant modules are separately connected peace
Mounted in front axle brake, stay in brake and a drive shaft.In addition, aforementioned redundant module may include a redundant solenoid valve and a redundant
Gas cylinder, redundant solenoid valve are controlled by abnormal decision circuitry and open and close redundant gas cylinder, so as to directly braking.Aforementioned redundant mould
Block may include a redundant solenoid valve and a hand-operated valve, and redundant solenoid valve is controlled by abnormal decision circuitry and allows energy in brake
Enough intervention rear axles carry out stablizing redundant brake.Aforementioned redundant module may include a regeneration and recharge motor, be recharged with regeneration
The transmission system that motor power links vehicle carries out auxiliary brake.
Detailed description of the invention
Fig. 1 is the pneumatic brake exception detecting method flow diagram being painted according to the present invention；
Fig. 2 is the pneumatic brake abnormity detecting system architecture schematic diagram for being painted one embodiment of the invention；
Fig. 3 is the system exception diagnostic logic schematic diagram being painted in Fig. 2；
Fig. 4 is the gas storage unit pressure detection device detecting contrast judgement figure being painted in Fig. 2；
Fig. 5 is that the pedal travel detector being painted in Fig. 2 and gas storage unit pressure detection device detect contrast judgement figure；
Fig. 6 is that the front axle wheel cylinder air pressure detector being painted in Fig. 2 or building for rear axle wheel cylinder air pressure detector press the time to compare
Judgement figure；
Fig. 7 is that the pedal travel detector being painted in Fig. 2 and front axle wheel cylinder air pressure detector or rear axle wheel cylinder air pressure are detected
The contrast judgement figure of device；
Fig. 8 is the rear axle wheel cylinder air pressure detector being painted in Fig. 2 and the contrast judgement figure for staying brake control signal；And
Fig. 9 be painted another embodiment of the present invention have help function pneumatic brake abnormity detecting system architecture signal
Figure.
Specific embodiment
The following drawings illustrate multiple embodiments of the invention.As clearly stated, the details in many practices
It will be explained in the following description.It should be appreciated, however, that the details in these practices is not applied to limit the present invention.Also
It is to say, in section Example of the present invention, the details in these practices is non-essential.In addition, for the sake of simplifying attached drawing, it is some
Known usual structure will be painted in a manner of simply illustrating in the accompanying drawings with element；And duplicate element will likely use phase
Same number indicates.
Fig. 1 is please referred to, Fig. 1 is the pneumatic brake exception detecting method flow diagram being painted according to the present invention.The present invention
Main method process be an a pressure abnormity judgment step S101 and film exception judgment step S102；But figure embodiment herein
One redundant of middle increase estimates step S103.
In pressure abnormity judgment step S101, a brake pedal stroke, a wheel cylinder pressure and a gas are detected first
Potential source pressure, and carry out contrast judgement with the whether appropriate wheel cylinder pressure of brake pedal stroke weight and a pneumatic supply pressure
It is abnormal, if abnormal send out one first abnormal signal again.
And film exception judgment step S102 is to carry out one to stay braking detective and wheel cylinder pressure detection.And it is stopped with staying
Vehicle open/close states (locking or dissociation) and wheel cylinder pressure ratio pair, issue one second abnormal signal after judging exception.It is aforementioned
It is to start to walk to be auxiliarily fixed the purposes of position as stopping to fix position or go up a slope in brake function.
Aforementioned redundant estimates step S103, redundant estimation step combine judge the first abnormal signal, the second abnormal signal and
Judging automatically and estimating for redundant starting is carried out after one speed.Vehicle is added by aforementioned first abnormal signal and the second abnormal signal
After speed estimates judging result, the movement of more correct auxiliary brake method or emergency brake can analyze.Pass through pneumatic brake
Pressure abnormity judgment step S101 and the available accurate exception of film exception judgment step S102 in exception detecting method
Signal can also further carry out automatization judgement and the estimation of redundant starting with aforementioned redundant estimation step S103.
In addition, pneumatic brake exception detecting method above-mentioned can have an alert stage, alert stage, which combines, judges the
Audio, light or vibration warning are carried out after one abnormal signal, the second abnormal signal and a speed, this turns for general common technology
With seldom repeating herein.
Fig. 2 to Fig. 8 is please referred to, Fig. 2 is the pneumatic brake abnormity detecting system architecture signal for being painted one embodiment of the invention
Figure.The system exception diagnostic logic schematic diagram in Fig. 2 is painted in Fig. 3.And Fig. 4 is then painted the gas storage unit pressure detection in Fig. 2
Device 202 detects contrast judgement figure.Fig. 5 is the pedal travel detector 201 and gas storage unit pressure detection device 202 being painted in Fig. 2
Detect contrast judgement figure.Fig. 6 is the front axle wheel cylinder air pressure detector 203 or rear axle wheel cylinder air pressure detector 204 being painted in Fig. 2
Build pressure time contrast judgement figure.It is again the pedal travel detector 201 and front axle wheel cylinder air pressure detector being painted in Fig. 2 with Fig. 7
203 or rear axle wheel cylinder air pressure detector 204 contrast judgement figure.It is finally the rear axle wheel cylinder air pressure detecting being painted in Fig. 2 with Fig. 8
Device 204 controls the contrast judgement figure of signal with brake control valve 105 is stayed.
A pneumatic brake abnormity detecting system 100 is provided refering to the present invention known to aforementioned each figure, is stepped on comprising a brake
Plate 101, a pedal travel detector 201, a gas storage unit 102, a gas storage unit pressure detection device 202, front axle brake point
103, one front axle wheel cylinder air pressure detector 203 of pump, a rear shaft braking wheel cylinder 104, a rear axle wheel cylinder air pressure detector 204, one are stayed
The abnormal decision circuitry 206 of brake control valve 105, a contact in brake 205, one, a relay valve 107, a quick release valve 108 and one are empty
Press 109.The detailed description of aforementioned elements and connection relationship are as after.
After the aforementioned gas supply of air compressor machine 109 connection gas storage unit 102, brake pedal 101 is separately connected by gas storage unit 102
Brake valve 1011, relay valve 107 and stay brake control valve 105.Brake valve 1011 passes through quick release valve 108 to front axle wheel cylinder
103 provide brake pressure.And relay valve 107 connects brake valve 1011 and provides brake pressure to rear axle wheel cylinder 104.It is aforementioned
Rear shaft braking wheel cylinder 104, which also connects, stays brake control valve 105.
Aforementioned exception decision circuitry 206 then distinguishes circuit connection pedal travel detector 201, gas storage unit pressure detection device
202, front axle wheel cylinder air pressure detector 203, rear axle wheel cylinder air pressure detector 204 and contact in brake 205, and this judges electricity extremely
Road 206 is a part of electronic control unit ECU (Electronic Control Unit).
Pedal travel detector 201 connects brake pedal 101 to export a pedal travel signal to abnormal decision circuitry 206
S.Front axle wheel cylinder air pressure detector 203 is then connection front axle wheel cylinder 103 to export a front axle point to abnormal decision circuitry 206
It is pumped force signal Pf.Rear axle wheel cylinder air pressure detector 204 connects a rear shaft braking wheel cylinder 104 with defeated to abnormal decision circuitry 206
A rear axle wheel cylinder pressure signal P r out.And gas storage unit pressure detection device 202 is one gas storage unit 102 of connection with to abnormal judgement
Circuit 206 exports a gas storage unit pressure signal P.Separately there is the connection of contact in brake 205 to stay brake control valve 105 to sentence to exception
Deenergizing 206 exports a Z in brake control signal.Abnormal decision circuitry 206 obtains Z in brake control signal, pedal travel altogether
Signal S, front axle wheel cylinder pressure signal P f, rear axle wheel cylinder pressure signal P r and gas storage unit pressure signal P.
Also referring to the system exception diagnostic logic schematic diagram of decision circuitry 206 abnormal in Fig. 3, so as to cooperating Fig. 4 extremely
Fig. 8 will be understood that the technological means of normal every detecting and judgement of the invention, exception or failure.
Gas storage unit pressure detection device (figure number is referring to fig. 2) detecting contrast judgement figure as shown in Figure 4 can illustrate this case gas
Positive pressure often whether contrast judgement.Wherein, abnormal decision circuitry 206 can be according to front axle wheel cylinder pressure detection device, rear axle wheel cylinder pressure
Force detection device, gas storage unit pressure detection device obtain front axle wheel cylinder pressure signal, rear axle wheel cylinder pressure signal and gas storage unit pressure
Force signal carries out high-low pressure distribution judgement, is divided into three kinds of situations according to gas pressure distribution situation: normal, exception, failure.
Pedal travel detector 201 and gas storage unit pressure detection device 202 as shown in Figure 5 detects contrast judgement figure.Its
In, abnormal decision circuitry 206 can compare the gas storage unit that pedal travel signal S and gas storage unit pressure detection device 202 obtain
The abnormal leakage that pressure signal P carries out gas storage unit 102 judges detecting result.
The pressure time of building of front axle wheel cylinder air pressure detector 203 as shown in FIG. 6 or rear axle wheel cylinder air pressure detector 204 compares
Judgement figure.Wherein, abnormal decision circuitry 206 as Fig. 6 can compare pedal travel signal S, front axle wheel cylinder pressure signal P f and after
Axis wheel cylinder pressure signal P r build the detecting judgement of pressure time.
Pedal travel detector 201 as shown in Figure 7 is detected with, gas storage unit pressure detection device 202, front axle wheel cylinder air pressure
The contrast judgement figure of device 203, rear axle wheel cylinder air pressure detector 204.Abnormal decision circuitry 206 obtains pedal travel signal S, front axle
Sentenced after wheel cylinder pressure signal P f, rear axle wheel cylinder pressure signal P r and gas storage unit pressure signal P using the pressure time distribution of Fig. 7
It is disconnected abnormal.Utilize Fig. 7's after comparing front axle wheel cylinder pressure signal P f or rear axle wheel cylinder pressure signal P r again with pedal travel signal S
Time and brake pressure (pedal travel signal S) distribution judgement one first abnormal signal of output.
Finally, contact in brake 205 as shown in Figure 8 and the contrast judgement figure for staying the control signal of brake control valve 105.Its
In, after abnormal decision circuitry 206 obtains the Z in brake control signal of contact in brake 205, utilize staying for contact in brake 205
The opening and closing (locking or dissociation) of brake control valve 105 is stayed in brake control signal Z comparison judgement, and then can assess rear axle wheel cylinder pressure
Force signal Pr is that there are positive pressure or negative pressure conditions, judges whether rear axle wheel cylinder film loses using rear axle wheel cylinder pressure signal P r whereby
Effect is abnormal, and judges to export one second abnormal signal.
In pneumatic brake abnormity detecting system above-mentioned, abnormal decision circuitry 206 is including the first abnormal signal, second
Under the operation of abnormal signal, speed and other factorial analyses judgement, it is single to can use the abnormal cooperation of decision circuitry 206 electronic control
First ECU (Electronic Control Unit) other part directly grasp control vehicle on various auxiliary brakes act and
Device.
Again referring to Fig. 9, Fig. 9 is the pneumatic brake abnormity detecting system architecture schematic diagram of another embodiment.The present embodiment
Three redundant modules 301~303 of middle increase.Remaining component is consistent with previous embodiment, no longer discusses identical member in this embodiment
Part.The present invention provides the redundant after three redundant modules 301~303 cooperate abnormal decision circuitry (not shown) to judge and stops
Vehicle.Redundant module 301~303 receive respectively the first abnormal signal of abnormal decision circuitry transmitting, the second abnormal signal or other
After status signals, in conjunction with judging to carry out redundant module 301~303 after the first abnormal signal, the second abnormal signal and a speed
Automatic open close or manual opening-closing and estimation；Automatic or manual carries out redundant brake.
Aforementioned redundant module 301 connects front axle wheel cylinder 103, and redundant module 301 includes a redundant solenoid valve 3021
And a redundant gas cylinder 3012, redundant solenoid valve 3021 is controlled by abnormal decision circuitry and opens and closes redundant gas cylinder 3012, so as to straight
It connects to the gas supply pressurization of front axle wheel cylinder 103 effectively to carry out redundant brake.
Aforementioned redundant module 302 connects rear shaft braking wheel cylinder 104, and redundant module 302 then includes a redundant solenoid valve
3021 and a hand-operated valve 3022, redundant solenoid valve 3021 is controlled by abnormal decision circuitry and appropriateness is released in brake pressure, is made
The rear axle of intervention in brake spring carries out redundant brake.
Aforementioned redundant module 303 is then that a regeneration recharges motor, and the transmission system of motor power connection vehicle is recharged with this
(driving wheel or transmission shaft), so that it may recharge reduction speed while motor recharges accumulation of energy in regeneration and carry out auxiliary brake.
In summary, pneumatic brake abnormity detecting system of the invention have break condition judgement is accurate, rapid reaction without
The features such as postponing and can controlling redundant with specific aim, has wide range of applications, is suitable for various driving conditions, can effectively improve row
Vehicle safety.Although the present invention is disclosed above with embodiment, however, it is not to limit the invention, any to be familiar with this skill
Person, without departing from the spirit and scope of the present invention, when can be used for a variety of modifications and variations, therefore protection scope of the present invention is worked as
Subject to the scope of which is defined in the appended claims.
Claims (14)
1. a kind of pneumatic brake abnormity detecting system, characterized by comprising:
One pedal travel detector connects a brake pedal to export a pedal travel signal outward；
One front axle wheel cylinder air pressure detector, connection one front axle brake to export a front axle wheel cylinder pressure signal outward；
One rear axle wheel cylinder air pressure detector connects a rear shaft braking to export a rear axle wheel cylinder pressure signal outward；
One gas storage unit pressure detection device connects a gas storage unit to export a gas storage unit pressure signal outward；
One contact in brake, connection one stay brake control valve and stay brake control signal to export one outward；And
One abnormal decision circuitry connects the pedal travel detector, the front axle wheel cylinder air pressure detector, the rear axle wheel cylinder air pressure are detectd
Survey device, the gas storage unit pressure detection device and should contact in brake, and the exception decision circuitry obtains the pedal travel signal, preceding
Axis wheel cylinder pressure signal, rear axle wheel cylinder pressure signal, the gas storage unit pressure signal and should stay brake control signal；
Wherein, the exception decision circuitry is with the pedal travel signal fusing front axle wheel cylinder pressure signal or the rear axle wheel cylinder pressure
One first abnormal signal of judgement output after signal；And the exception decision circuitry stays brake control signal with this and compares the rear axle wheel cylinder
One second abnormal signal of judgement output after pressure signal.
2. pneumatic brake abnormity detecting system according to claim 1, which is characterized in that also include:
One quick release valve, air pressure is connected between the brake pedal and front axle brake, and the front axle wheel cylinder air pressure detector air pressure
It is connected between the quick release valve and front axle brake；
One relay valve, air pressure are connected between the gas storage unit, the brake pedal and the rear shaft braking, and the rear axle wheel cylinder air pressure
Detector air pressure is connected between the relay valve and the rear shaft braking.
3. pneumatic brake abnormity detecting system according to claim 1, which is characterized in that the exception decision circuitry is electronics
Control unit ECU.
4. a kind of pneumatic brake exception detecting method, which is characterized in that comprise the steps of:
One pressure abnormity judgment step, one brake pedal stroke of detecting, a wheel cylinder pressure and a pneumatic supply pressure, and compare
To judging to issue one first abnormal signal after exception；And
One film exception judgment step carries out a detecting in brake control valve, and with an open/close states in brake and the brake
One second abnormal signal is issued after wheel cylinder pressure contrast judgement exception.
5. pneumatic brake exception detecting method according to claim 4, which is characterized in that additionally comprise:
One redundant estimates step, in conjunction with judge that progress redundant opens after first abnormal signal, second abnormal signal and a speed
It is dynamic to judge automatically and estimate.
6. pneumatic brake exception detecting method according to claim 4, which is characterized in that additionally comprise:
One alert stage, in conjunction with judge to carry out after first abnormal signal, second abnormal signal and a speed audio, light or
Vibration warning.
7. a kind of pneumatic brake abnormity detecting system, characterized by comprising:
One pedal travel detector connects a brake pedal to export a pedal travel signal outward；
One front axle wheel cylinder air pressure detector, connection one front axle brake to export a front axle wheel cylinder pressure signal outward；
One rear axle wheel cylinder air pressure detector connects a rear shaft braking to export a rear axle wheel cylinder pressure signal outward；
One gas storage unit pressure detection device connects a gas storage unit to export a gas storage unit pressure signal outward；
One contact in brake, connection one stay brake control valve and stay brake control signal to export one outward；
One abnormal decision circuitry connects the pedal travel detector, the front axle wheel cylinder air pressure detector, the rear axle wheel cylinder air pressure are detectd
Survey device, the gas storage unit pressure detection device, should contact in brake, and the exception decision circuitry obtains the pedal travel signal, preceding
Axis wheel cylinder pressure signal, rear axle wheel cylinder pressure signal, the gas storage unit pressure signal and brake control signal should be stayed, which sentence
Deenergizing is to judge output one after the pedal travel signal fusing front axle wheel cylinder pressure signal or the rear axle wheel cylinder pressure signal
First abnormal signal；And the exception decision circuitry with this stay brake control signal compare judge after the rear axle wheel cylinder pressure signal it is defeated
One second abnormal signal out；And
One redundant module, receive the exception decision circuitry transmitting first abnormal signal or second abnormal signal after it is controlled into
Row redundant brake.
8. pneumatic brake abnormity detecting system according to claim 7, which is characterized in that the redundant module connects the front axle
Brake, the rear shaft braking or one stay brake.
9. pneumatic brake abnormity detecting system according to claim 8, which is characterized in that the redundant module includes a redundant
Solenoid valve and a redundant gas cylinder, the redundant solenoid valve are controlled by the exception decision circuitry and open and close the redundant gas cylinder.
10. pneumatic brake abnormity detecting system according to claim 7, which is characterized in that the redundant module includes one standby
Solenoid valve and a hand-operated valve are helped, which is controlled by the exception decision circuitry and progress can be intervened by making one to stay brake
Redundant brake.
11. pneumatic brake abnormity detecting system according to claim 7, which is characterized in that the redundant module is comprising again and again
Life recharges motor, which recharges motor power connection and carry out auxiliary brake.
12. pneumatic brake abnormity detecting system according to claim 7, which is characterized in that the redundant module number is more
It is a.
13. pneumatic brake abnormity detecting system according to claim 12, which is characterized in that the redundant module number is two
A, the two redundant modules, which are separately connected, is mounted on front axle brake and one in brake.
14. pneumatic brake abnormity detecting system according to claim 12, which is characterized in that the redundant module number is three
A, the three redundant modules, which are separately connected, is mounted on front axle brake, one in brake and a drive shaft.
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| CN112622851B (en) * | 2019-10-08 | 2021-12-10 | 财团法人车辆研究测试中心 | Brake control method according to road surface friction characteristics |
| TWI740656B (en) * | 2020-09-21 | 2021-09-21 | 財團法人工業技術研究院 | Heavy vehicle brake control device and method thereof |
| CN114162105B (en) * | 2021-10-29 | 2023-08-29 | 西安航空制动科技有限公司 | Residual pressure warning method for aircraft brake system |
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