CN113830060A - Control system and control method for improving pneumatic parking reliability - Google Patents
Control system and control method for improving pneumatic parking reliability Download PDFInfo
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- CN113830060A CN113830060A CN202111278964.9A CN202111278964A CN113830060A CN 113830060 A CN113830060 A CN 113830060A CN 202111278964 A CN202111278964 A CN 202111278964A CN 113830060 A CN113830060 A CN 113830060A
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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
- B60T15/00—Construction arrangement, or operation of valves incorporated in power brake systems and not covered by groups B60T11/00 or B60T13/00
- B60T15/02—Application and release valves
- B60T15/025—Electrically controlled valves
- B60T15/027—Electrically controlled valves in pneumatic systems
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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
- B60T15/00—Construction arrangement, or operation of valves incorporated in power brake systems and not covered by groups B60T11/00 or B60T13/00
- B60T15/02—Application and release valves
- B60T15/04—Driver's valves
- B60T15/12—Driver's valves combined with relay valves or the like
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- Valves And Accessory Devices For Braking Systems (AREA)
- Braking Systems And Boosters (AREA)
Abstract
The invention relates to a control system and a control method for improving pneumatic parking reliability, which comprises the following steps: the relay valve is provided with a first air inlet, a first air outlet, a first air release port and a first control port, the first air release port is communicated with the atmosphere, and the first control port is communicated with a third air outlet of the hand valve; the gas storage device is communicated with the first gas inlet; the brake air chamber is used for air-break braking and is communicated with the first air outlet; when the air pressure of the third air outlet is lower than a first threshold value, wherein the first threshold value is larger than the atmospheric pressure, the first air outlet is communicated with the first air release opening; when the air pressure of the third air outlet is higher than or equal to a first threshold value, the first air outlet is communicated with the first air inlet. The brake chamber can be prevented from generating a low-air-pressure state, so that the brake chamber only has a high-air-pressure state during driving and a zero-air-pressure state during parking, and the parking reliability is improved.
Description
Technical Field
The invention relates to the field of automobile parking braking, in particular to a control system and a control method for improving pneumatic parking reliability.
Background
At present, the commercial vehicle mostly adopts pneumatic parking, and for guaranteeing the stability of parking, often adopt disconnected gas formula braking, when the gas of brake chamber was arranged to the greatest extent promptly, the car realizes the braking, and when brake chamber let in high-pressure gas, car braking cancellation can guarantee automatic parking braking when the gas circuit damages, improves the security of driving.
In the related technology, the relay valve is usually arranged at the position close to the brake chamber to communicate the brake chamber with the air storage cylinder or the atmosphere, so that the brake chamber is inflated and deflated, and the air storage cylinder does not need to pass through a brake valve in the process of inflating and deflating the brake chamber, thereby greatly shortening the time of inflating and deflating the brake chamber and improving the sensitivity of braking.
However, at present, the switching of the relay valve is controlled by communicating the brake valve with the control port of the relay valve, and due to the structural problems of a pipeline and a valve body, the problems of valve clamping, blockage, air blowby and the like often exist in the gas transmission process, so that the brake chamber is in a low-pressure state, the brake chamber is partially opened, the vehicle is in a dragging brake state during driving, the brake is greatly damaged, and the risk of slope slip exists when the parking brake force is insufficient during parking.
Disclosure of Invention
The embodiment of the invention provides a control system and a control method for improving pneumatic parking reliability, and aims to solve the problem that parking braking is abnormal due to the fact that air pressure of a brake chamber is in a low-pressure state between high pressure and zero air pressure in the related technology.
In a first aspect, a control system for improving pneumatic parking reliability is provided, comprising: the relay valve is provided with a first air inlet, a first air outlet, a first air release port and a first control port, the first air release port is communicated with the atmosphere, and the first control port is communicated with a third air outlet of the hand valve; the gas storage device is communicated with the first gas inlet; the brake air chamber is used for air-break braking and is communicated with the first air outlet; when the air pressure of the third air outlet is lower than a first threshold value, wherein the first threshold value is larger than the atmospheric pressure, the first air outlet is communicated with the first air release opening; when the air pressure of the third air outlet is higher than or equal to a first threshold value, the first air outlet is communicated with the first air inlet.
In some embodiments, the control system further comprises: the air discharging device is provided with a second air inlet, a second air outlet and a second air discharging port, the second air discharging port is communicated with the atmosphere, and the second air outlet is communicated with the first control port; when the air pressure of the second air inlet is lower than a first threshold value, the second air outlet is communicated with the second air release port; when the air pressure of the second air inlet is higher than or equal to a first threshold value, the second air outlet is communicated with the second air inlet.
In some embodiments, the second inlet port is closed when the second outlet port is in communication with the second bleed port.
In some embodiments, the air discharging device includes a switching elastic member, the second air outlet communicates with the second air discharging opening when the switching elastic member is in an initial state, and the switching elastic member elastically deforms to communicate the second air outlet with the second air inlet when the pressure of the second air inlet is greater than or equal to a first threshold value.
In some embodiments, the air pressure at the third outlet is P1, the first threshold is P0, the air pressure at the first inlet is P3, and when P1> P0, the air pressure at the second outlet is P4, P4 ═ nP3, where 0< n < 1.
In some embodiments, the hand valve is used for converting a parking signal, and the hand valve has a third air outlet, a third air inlet and a third air outlet, the third air inlet is communicated with the air storage device, and the third air outlet is communicated with the atmosphere; when the vehicle needs to be parked, the third air release opening of the hand valve is communicated with the third air outlet.
In some embodiments, the control system further comprises: the air bleeding device is provided with a second air inlet, a second air outlet, a second air bleeding port and a second control port, the second air bleeding port is communicated with the atmosphere, the second air outlet is communicated with the brake chamber, and the second control port is communicated with the first air outlet; when the air pressure of the second control port is lower than a first threshold value, the second air outlet is communicated with a second air release port; when the air pressure of the second control port is higher than or equal to a first threshold value, the second air outlet is communicated with the second air inlet.
In some embodiments, the relative air pressure of the first threshold value ranges from 30KPa to 600 KPa.
In a second aspect, a control method for improving pneumatic parking reliability is provided, which is characterized by comprising the following steps: comparing the air pressure P1 at the third outlet port to a first threshold P0; when P1< P0, controlling a first air outlet of the relay valve to be communicated with a first air release port, so that a brake air chamber is communicated with the atmosphere; when P1 is more than or equal to P0, the first air outlet of the relay valve is controlled to be communicated with the first air inlet, so that the brake air chamber is communicated with the air storage device.
In some embodiments, when P1 is greater than or equal to P0, the method for controlling the first air outlet of the relay valve to communicate with the first air inlet so that the brake air chamber is communicated with the air storage device comprises the following steps: comparing the gas pressure P1 at the third outlet with a second threshold P5, wherein P0 < P5; if P0 is not more than P1 and not more than P5, a fault is indicated to be reported by mistake, and the first air outlet of the relay valve is controlled to be communicated with the first air inlet, so that the brake air chamber is communicated with the air storage device; if P5 is not more than P1, the first air outlet of the relay valve is controlled to be communicated with the first air inlet, so that the brake air chamber is communicated with the air storage device.
The technical scheme provided by the invention has the beneficial effects that:
the embodiment of the invention provides a control system and a control method for improving pneumatic parking reliability, wherein a first air inlet of a relay valve is communicated with an air storage device, a first air outlet is communicated with a brake air chamber, when the air pressure of a third air outlet of a hand valve is higher than a first threshold value, the first air inlet can be communicated with the first air outlet, the brake air chamber is inflated, the condition that a vehicle is not braked under the high-pressure state of the hand valve is met, when the air pressure of the third air outlet of the hand valve is lower than the first threshold value, the first air outlet is communicated with a first air release port, the brake air chamber is communicated with the atmosphere through the relay valve, at the moment, the brake air chamber brakes the vehicle, the parking is realized, the low-air-pressure state of the brake air chamber is avoided by setting the first threshold value, the dragging brake phenomenon during driving and the parking instability phenomenon can be reduced, the parking stability is improved, and therefore, the low-pressure state of the brake air chamber can be avoided, the brake chamber is only in a high air pressure state during driving and a zero air pressure state during parking, and the reliability of parking is improved.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
FIG. 1 is a pneumatic schematic of a related art park system;
FIG. 2 is a pneumatic schematic diagram for improving parking reliability according to an embodiment of the present invention;
FIG. 3 is a graph of air pressure versus a previous and a following scenario;
FIG. 4 is a pneumatic schematic of the air bleed device;
FIG. 5 is a flow chart of one embodiment of the present invention;
FIG. 6 is a flow chart of another embodiment of the present invention.
In the figure:
1. a relay valve; 11. a first air inlet; 12. a first air outlet; 13. a first control port; 14. a first relief port;
2. a hand valve; 21. a third air inlet; 22. a third air outlet; 23. a third relief port;
3. a gas storage device;
4. a brake chamber;
5. an air release device; 51. a second air outlet; 52. a second air inlet; 53. a second relief port; 54. a second control port.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the scope of the present invention.
Referring to fig. 1, a pneumatic schematic diagram of a pneumatic parking in the related art is shown, in which a relay valve 1 is used to control the inflation and deflation of a brake chamber 4, and this is achieved by communicating a first air inlet 11 of the relay valve 1 with a first deflation port 14 when a first control port 13 of the relay valve 1 senses air, so as to communicate the brake chamber 4 with an air storage device 3, during actual use, because a pipeline of an air path is long, the air leakage in the air path is difficult to avoid, during driving, the air pressure is low due to the air path leakage, the air led to the brake chamber 4 cannot completely cancel braking, a vehicle is in a semi-braking state, i.e., a dragging braking state, which not only damages the brake device and reduces the service life of the brake chamber 4, but also may cause high-temperature tire burst or fire if the dragging phenomenon is not recognized for a long time, and the vehicle continues to keep driving, when the vehicle is parked, the first control port 13 of the relay valve 1 should be communicated with the atmosphere theoretically, and when the vehicle is actually used, residual air pressure exists in a pipeline and a valve body, so that the air pressure at the first control port 13 still enables the first air inlet 11 to be communicated with the first air outlet 12, and air in the brake air chamber 4 cannot be completely discharged, so that parking braking force is reduced, a vehicle may slide down a slope when the vehicle is parked, and related traffic accidents are easily caused.
The embodiment of the invention provides a control system and a control method for improving pneumatic parking reliability, which can solve the problem that parking braking is abnormal due to the fact that air pressure of a brake chamber is in a low-pressure state between high pressure and zero air pressure in the related art.
Referring to fig. 2, a control system for improving pneumatic parking reliability according to an embodiment of the present invention may include: the relay valve 1, the relay valve 1 can have the first air inlet 11, the first air outlet 12, the first relief port 14 and the first control port 13, the first relief port 14 communicates with atmosphere, the first control port 13 can communicate with the third air outlet 22 of the hand valve 2; the gas storage device 3, the gas storage device 3 can be communicated with the first gas inlet 11; the brake chamber 4 is used for air-break braking, and the brake chamber 4 can be communicated with the first air outlet 12; when the air pressure at the third air outlet 22 is lower than a first threshold value, wherein the first threshold value is greater than the atmospheric pressure, the first air outlet 12 may communicate with the first air release opening 14; when the air pressure of the third air outlet 22 is higher than or equal to a first threshold value, the first air outlet 12 may be communicated with the first air inlet 11, in this embodiment, the first air inlet 11 of the relay valve 1 is communicated with the air storage device 3 through an air pipe, the first air outlet 12 of the relay valve 1 is communicated with the brake air chamber 4 through an air pipe, when the air pressure of the third air outlet 22 of the hand valve 2 is lower than the first threshold value, the first air outlet 12 communicated with the brake air chamber 4 is communicated with the atmosphere through the first air release port 14, so as to release air from the brake air chamber 4 and complete parking braking of the vehicle, when the air pressure of the third air outlet 22 of the hand valve 2 is greater than or equal to the first threshold value, the first air outlet 12 communicated with the brake air chamber 4 is communicated with the air storage device 3 through the first air inlet 11, so as to inflate the brake air chamber 4, so as to meet the requirement of normal driving, by setting the first threshold value, when the air pressure in the air passage is too low, the brake chamber 4 is directly communicated with the atmosphere to realize braking, the brake chamber 4 is prevented from being still in an inflation state when in a low-air-pressure state, the air pressure of the brake chamber 4 is ensured to be only in two states, one is that the air pressure of the brake chamber 4 is in an atmospheric pressure state to realize complete braking, and the other is that the brake chamber 4 is introduced with high-pressure gas to meet the normal driving of a vehicle, in the embodiment, the air bleeding device 5 is arranged to realize the control of the air pressure, in other embodiments, it is also possible to arrange the switching air pressure of the relay valve 1 such that the relay valve 1 communicates the first outlet port 12 with the first inlet port 11 only when the air pressure at the first control port 13 is greater than a first threshold value, in other cases, the first outlet 12 is communicated with the first inlet 11, and the mode of the relay valve 1 can be switched by arranging a relevant sensor and a matched program.
Referring to fig. 2 and 4, in some alternative embodiments, the control system may further include: the air bleeding device 5, the air bleeding device 5 can have the second air inlet 52, the second air outlet 51 and the second air bleeding hole 53, the second air bleeding hole 53 can be communicated with the atmosphere, the second air outlet 51 can be communicated with the first control port 13; when the air pressure of the second air inlet 52 is lower than the first threshold value, the second air outlet 51 can be communicated with the second air release opening 53; when the air pressure of the second air inlet 52 is higher than or equal to the first threshold value, the second air outlet 51 can be communicated with the second air inlet 52, that is, the second air inlet 52 of the air bleeder 5 is communicated with the third air outlet 22 of the hand valve 2 through a pipeline, the second air outlet 51 of the air bleeder 5 is communicated with the first air inlet 11 of the relay valve 1 through a pipeline, that is, the on-off of the air path between the hand valve 2 and the relay valve 1 is controlled through the air bleeder 5, when the air pressure of the second air inlet 52 of the air bleeder 5 is lower than the first threshold value, the second air outlet 51 is controlled to be communicated with the second air outlet 53, the first air outlet 12 of the relay valve 1 is communicated with the first air outlet 14, the air bleeding of the brake air chamber 4 is realized, when the air pressure of the second air inlet 52 is higher than or equal to the first threshold value, the second air outlet 51 is controlled to be communicated with the second air inlet 52, the normal communication between the relay valve 1 and the hand valve 2 is realized, and the air pressure of the first air inlet 11 is larger than or equal to the first threshold value, so that the communication between the brake air chamber 4 and the air storage device 3 is met, and the brake air chamber 4 is in a high-pressure state, so that the normal running of the vehicle is met.
Referring to fig. 2 and 4, in some alternative embodiments, when the second air outlet 51 is communicated with the second air outlet 53, the second air inlet 52 is closed, that is, when the air bleeding device 5 is switched to the air bleeding mode, and at this time, the vehicle is in a parking state, and the air storage device 3 needs to perform pressure maintaining to prevent air leakage, in this embodiment, by closing the second air inlet 52, leakage of air in the air passage due to the second air inlet 52 is reduced, so that the pressure maintaining effect of the air storage device 3 can be improved, and the air leakage in the air storage device 3 when the hand brake is pulled up is avoided, so that the next vehicle cannot travel, in other embodiments, when the third air bleeding port 23 of the hand valve 2 is communicated with the third air outlet 22, the third air inlet 21 is also closed, so as to perform pressure maintaining on the air storage device 3.
Referring to fig. 2 and 4, in some alternative embodiments, the air discharging device 5 may include a switching elastic member, when the switching elastic member is in an initial state, the second air outlet 51 is communicated with the second air discharging opening 53, when the pressure of the second air inlet 52 is greater than or equal to a first threshold value, the switching elastic member may elastically deform to enable the second air outlet 51 to be communicated with the second air inlet 52, that is, the air discharging device 5 is switched by the switching elastic member when the pressure of the second air inlet 52 is less than the first threshold value, wherein the elastic deformation of the switching elastic member is greater when the pressure of the second air inlet 52 is greater than or equal to the first threshold value, wherein the elastic deformation may be compressed or stretched, when the pressure of the second air inlet 52 is greater than or equal to the first threshold value, the second air outlet 51 is communicated with the second air inlet 52, and when the pressure of the second air inlet 52 is lower than the first threshold value, the elastic deformation of the switching elastic member is smaller, it is unable to realize that second gas outlet 51 communicates with each other with second air inlet 52, wherein can realize different first threshold values through different switching elastic components, because switch elastic component when initial condition, second gas outlet 51 communicates with each other with second relief port 53, make second gas outlet 51 and second relief port 53 communicate with each other when switching elastic component is ageing, the vehicle is in braking state, remind the driver to change the switching elastic component of renewal, improve the security of driving, in this embodiment, realize the judgement of gassing through elastic component, compare the sensor, mechanical structure stability is stronger, the interference killing feature is stronger.
Referring to fig. 2, in some alternative embodiments, the air pressure at the third air outlet 22 is P1, the first threshold value is P0, the air pressure at the first air inlet 11 is P3, when P1> P0, the air pressure at the second air outlet 51 is P4, and P4 is nP3, where 0< n <1, that is, the relay valve 1 can reduce the pressure of the air storage device 3, the air pressure of the air storage device 3 is generally high and cannot be directly led to the brake chamber 4, if the brake chamber 4 is in a high pressure state, the brake chamber 4 may be leaked, which may cause damage to the brake chamber 4 for a long time, and the air pressure P4 at the second air outlet 51 meets the requirement of the brake chamber 4 by 0< n <1, thereby reducing the leakage failure of the brake chamber 4 due to high pressure.
Referring to fig. 2, in some alternative embodiments, the hand valve 2 may be used for converting the parking signal, the hand valve 2 may have a third air outlet 22, a third air inlet 21 and a third air outlet 23, the third air inlet 21 may be communicated with the air storage device 3, and the third air outlet 23 may be communicated with the atmosphere; when a driver needs to park the vehicle, the third air release opening 23 of the hand valve 2 is communicated with the third air outlet 22, that is, when the driver needs to park the vehicle, because the third air release opening 23 of the hand valve 2 is communicated with the third air outlet 22, the air pressure of the third air outlet 22 is the atmospheric pressure which is lower than the first threshold value, so that the first air release opening 14 of the relay valve 1 is communicated with the first air outlet 12, the air release of the brake air chamber 4 is completed, and the control of the parking system through the hand brake is realized.
Referring to fig. 1 and 2, in some alternative embodiments, the control system may further include an air bleeding device 5, the air bleeding device 5 may have a second air inlet 52, a second air outlet 51, a second air bleeding port 53 and a second control port 54, the second air bleeding port 53 is communicated with the atmosphere, the second air outlet 51 is communicated with the brake chamber 4, and the second control port 54 is communicated with the first air outlet 12; when the air pressure of the second control port 54 is lower than the first threshold value, the second air outlet 51 is communicated with the second air release port 53; when the air pressure of the second control port 54 is higher than or equal to the first threshold value, the second air outlet 51 is communicated with the second air inlet 52, that is, the air bleeding device 5 is arranged between the relay valve 1 and the brake air chamber 4, when the air pressure of the second air outlet 51 of the air bleeding device 5 is lower than the first threshold value, the brake air chamber 4 is communicated with a second air bleeding port 53 communicated with the atmosphere through the second air outlet 51, air bleeding of the brake air chamber 4 is realized, the air bleeding path is shorter, sensitive braking can be realized, wherein the second control port 54 can be communicated with the air bleeding device 5 through a pipeline to control whether the second air outlet 51 is communicated with the second air bleeding port 53, information transmission can also be realized through an electric signal, and when the second control port 54 detects that the air pressure value is lower than the first threshold value, a signal is sent to the air bleeding device 5 to control the second air outlet 51 to be communicated with the second air bleeding port 53.
Referring to fig. 3, which is a pressure curve for comparing a front and rear case, wherein a curve L1 is a pressure curve of an embodiment of the present invention, a curve L2 is a pressure curve of the related art, a curve P0 is a first threshold, when the pressure of the hand valve 2 of the curve L1 is lower than the first threshold, the pressure of the brake chamber 4 is reduced to the atmospheric pressure, i.e., parking of the vehicle is completed, compared to a curve L2, in which the pressure of the brake chamber 4 is in a low pressure state, theoretically, the slope of the curve L1 should be kept consistent before the first threshold, when the pressure of the hand valve is lower than the first threshold, the pressure of the brake chamber 4 is immediately reduced to the atmospheric pressure, actually, due to various factors, it may be difficult to achieve an effect of directly becoming the atmospheric pressure, it may be possible to cause a process of releasing the pressure of the brake chamber 4 to be gradually released due to the relaxation of the elastic member, however, compared to L2, in this case, the probability of the low pressure of the brake chamber 4 is greatly reduced, the stability of pneumatic parking is improved, the value range of the relative air pressure of the first threshold value can be 30KPa-600KPa, wherein the first threshold values of different vehicles are different, the structure with a valve body, the performance of the brake air chamber 4, the installation sealing performance of a pipeline and other factors which affect the first threshold values are different, the first threshold value needs to be calibrated according to the actual vehicle, so that the first threshold value can be suitable for the vehicle, the first threshold value of the current pneumatic parking vehicle is known to be set in the range of 30KPa-600KPa according to experience, and the calibration work of the first threshold value can be reduced by setting the range of the first threshold value.
Referring to fig. 5, a control method of a control system for improving pneumatic parking reliability according to an embodiment of the present invention may include the following steps: comparing the air pressure P1 at the third air outlet 22 with a first threshold P0; when P1< P0, the first air outlet 12 of the relay valve 1 can be controlled to be communicated with the first air release port 14, so that the brake air chamber 4 is communicated with the atmosphere; when the pressure of the third air outlet 22 of the hand valve 2 is lower than a first threshold value P0, the first air outlet 12 of the relay valve 1 is controlled to be communicated with the first air inlet 11, so that the brake air chamber 4 is communicated with the first air release port 14, so that the brake air chamber 4 is communicated with the atmosphere through the first air release port 14 of the relay valve 1, the brake device realizes parking braking of the vehicle, the pressure of the P1 is greater than or equal to P0, the brake air chamber 4 is communicated with the air storage device 3, normal running of the vehicle is met, wherein mode switching of the relay valve 1 can be realized through a mechanical structure, mode switching of the relay valve 1 can be realized through an electric control mode, or an EPB valve module is arranged to realize the effect.
Referring to FIG. 6, in some alternative embodiments, when P1 ≧ P0, the first outlet port 12 of the relay valve 1 is controlled to communicate with the first inlet port 11, so as to communicate the brake chamber 4 with the air storage device 3, including the steps of: comparing the air pressure P1 of the third air outlet 22 with a second threshold P5, wherein P0 < P5; if P0 is not more than P1 and not more than P5, a fault is indicated to be reported by mistake, and the first air outlet 12 of the relay valve 1 is controlled to be communicated with the first air inlet 11, so that the brake air chamber 4 is communicated with the air storage device 3; if P5 is less than or equal to P1, the first air outlet 12 of the relay valve 1 is controlled to communicate with the first air inlet 11, so that the brake air chamber 4 communicates with the air storage device 3, that is, if P0 is less than or equal to P1 and less than P5, that is, the air pressure of the third air outlet 22 is a low air pressure state other than high pressure and atmospheric pressure, at this time, the parking system of the vehicle is in an abnormal state, a fault is first prompted to report an error, so as to remind the driver that a fault such as air leakage may occur in the parking system, if the driver has not maintained all the time, when the air pressure value is further reduced to be lower than the first threshold P0, the brake air chamber 4 is deflated to force the vehicle to stop, in this embodiment, if P0 is less than or equal to P1 and less than P5, the brake air chamber 4 is already in a braking state, so as to have a deceleration effect on the vehicle, and a traffic accident caused by sudden and complete braking of the brake air chamber 4 can be avoided.
The control system and the control method for improving the pneumatic parking reliability provided by the embodiment of the invention have the following principles:
because the first air inlet 11 of the relay valve 1 is communicated with the air storage device 3, and the first air outlet 12 is communicated with the brake air chamber 4, when the air pressure of the third air outlet 22 of the hand valve 2 is higher than a first threshold value, the first air inlet 11 can be communicated with the first air outlet 12, so that the brake air chamber 4 can be inflated, the condition that the vehicle is not braked under the high-pressure state of the hand valve 2 is met, when the air pressure of the third air outlet 22 of the hand valve 2 is lower than the first threshold value, the first air outlet 12 is communicated with the first air release port 14, so that the brake air chamber 4 is communicated with the atmosphere through the relay valve 1, at the moment, the brake air chamber 4 brakes the vehicle, so that the vehicle is parked, the first threshold value is set, the low-air-pressure state of the brake air chamber 4 is avoided, the dragging brake phenomenon during driving and the parking instability phenomenon during parking can be reduced, the parking stability can be improved, wherein, the air release device 5 can be added in an air path, the air bleeder 5 can be arranged between the hand valve 2 and the relay valve 1, or the air bleeder 5 can be arranged between the relay valve 1 and the brake air chamber 4, or the air bleeder 5 and the relay valve 1 can be combined into a valve body, and corresponding low-pressure air bleeding is realized by arranging an air bleeding switch for the relay valve 1, so that the low-pressure state of the brake air chamber 4 can be avoided, the brake air chamber 4 only has a high-pressure state during driving and a zero-pressure state during parking, and the reliability of parking is improved.
In the description of the present invention, it should be noted that the terms "upper", "lower", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, which are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and operate, and thus, should not be construed as limiting the present invention. Unless expressly stated or limited otherwise, the terms "mounted," "connected," and "connected" are intended to be inclusive and mean, for example, that they may be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
It is to be noted that, in the present invention, relational terms such as "first" and "second", and the like, are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
The foregoing are merely exemplary embodiments of the present invention, which enable those skilled in the art to understand or practice the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (10)
1. A control system for improving pneumatic parking reliability, comprising:
the relay valve (1) is provided with a first air inlet (11), a first air outlet (12), a first air release port (14) and a first control port (13), the first air release port (14) is communicated with the atmosphere, and the first control port (13) is communicated with a third air outlet (22) of the hand valve (2);
the gas storage device (3), the gas storage device (3) is communicated with the first gas inlet (11);
the brake chamber (4) is used for air-break braking, and the brake chamber (4) is communicated with the first air outlet (12);
when the air pressure of the third air outlet (22) is lower than a first threshold value, wherein the first threshold value is larger than the atmospheric pressure, the first air outlet (12) is communicated with the first air release opening (14);
when the air pressure of the third air outlet (22) is higher than or equal to a first threshold value, the first air outlet (12) is communicated with the first air inlet (11).
2. The control system for improving pneumatic parking reliability of claim 1, further comprising:
the air discharging device (5) is provided with a second air inlet (52), a second air outlet (51) and a second air discharging opening (53), the second air discharging opening (53) is communicated with the atmosphere, and the second air outlet (51) is communicated with the first control opening (13);
when the air pressure of the second air inlet (52) is lower than a first threshold value, the second air outlet (51) is communicated with the second air outlet (53);
when the air pressure of the second air inlet (52) is higher than or equal to a first threshold value, the second air outlet (51) is communicated with the second air inlet (52).
3. The control system for improving pneumatic parking reliability of claim 2, wherein:
when the second air outlet (51) is communicated with the second air release opening (53), the second air inlet (52) is closed.
4. The control system for improving pneumatic parking reliability of claim 2, wherein:
the air discharging device (5) comprises a switching elastic piece, when the switching elastic piece is in an initial state, the second air outlet (51) is communicated with the second air discharging opening (53), and when the pressure of the second air inlet (52) is larger than or equal to a first threshold value, the switching elastic piece is elastically deformed to enable the second air outlet (51) to be communicated with the second air inlet (52).
5. The control system for improving pneumatic parking reliability of claim 2, wherein:
the air pressure of the third air outlet (22) is P1, the first threshold value is P0, the air pressure of the first air inlet (11) is P3, when P1> P0, the air pressure of the second air outlet (51) is P4, P4 is nP3, wherein 0< n < 1.
6. The control system for improving pneumatic parking reliability of claim 1, wherein:
the hand valve (2) is used for converting parking signals, the hand valve (2) is provided with a third air outlet (22), a third air inlet (21) and a third air release port (23), the third air inlet (21) is communicated with the air storage device (3), and the third air release port (23) is communicated with the atmosphere;
when parking is needed, the third air release opening (23) of the hand valve (2) is communicated with the third air outlet (22).
7. The control system for improving pneumatic parking reliability of claim 1, wherein the control system further comprises:
the air bleeding device (5) is provided with a second air inlet (52), a second air outlet (51), a second air bleeding opening (53) and a second control opening (54), the second air bleeding opening (53) is communicated with the atmosphere, the second air outlet (51) is communicated with the brake air chamber (4), and the second control opening (54) is communicated with the first air outlet (12);
when the air pressure of the second control port (54) is lower than a first threshold value, the second air outlet (51) is communicated with a second air release port (53);
when the air pressure of the second control port (54) is higher than or equal to a first threshold value, the second air outlet (51) is communicated with the second air inlet (52).
8. The control system for improving pneumatic parking reliability of claim 1, wherein:
the value range of the relative air pressure of the first threshold value is 30KPa-600 KPa.
9. A control method for improving pneumatic parking reliability is characterized by comprising the following steps:
comparing the air pressure P1 at the third outlet (22) with a first threshold P0;
when P1 is less than P0, the first air outlet (12) of the relay valve (1) is controlled to be communicated with the first air release port (14), so that the brake air chamber (4) is communicated with the atmosphere;
when P1 is larger than or equal to P0, the first air outlet (12) of the relay valve (1) is controlled to be communicated with the first air inlet (11), so that the brake air chamber (4) is communicated with the air storage device (3).
10. The control method according to claim 9, wherein when P1 is greater than or equal to P0, the control relay valve (1) is controlled to communicate the first outlet port (12) with the first inlet port (11) to communicate the brake chamber (4) with the air storage device (3), and the method comprises the following steps:
comparing the gas pressure P1 at the third outlet (22) with a second threshold value P5, wherein P0 < P5;
if P0 is not more than P1 and not more than P5, a fault is indicated to be reported by mistake, and the first air outlet (12) of the relay valve (1) is controlled to be communicated with the first air inlet (11), so that the brake air chamber (4) is communicated with the air storage device (3);
if the P5 is not more than P1, the first air outlet (12) of the relay valve (1) is controlled to be communicated with the first air inlet (11), so that the brake air chamber (4) is communicated with the air storage device (3).
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| Application Number | Priority Date | Filing Date | Title |
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| CN202111278964.9A CN113830060B (en) | 2021-10-31 | 2021-10-31 | Control system and control method for improving pneumatic parking reliability |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202111278964.9A CN113830060B (en) | 2021-10-31 | 2021-10-31 | Control system and control method for improving pneumatic parking reliability |
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| CN113830060B CN113830060B (en) | 2022-08-12 |
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| CN101263034A (en) * | 2005-07-20 | 2008-09-10 | 克诺尔商用车制动系统有限公司 | Pneumatic braking system for a commercial vehicle |
| CN201934644U (en) * | 2011-03-04 | 2011-08-17 | 东风汽车有限公司 | Electric control system of gas circuit of front auxiliary box of transmission |
| CN103287418A (en) * | 2013-07-01 | 2013-09-11 | 王石麟 | Automobile automatic emergency auxiliary braking device |
| CN203611969U (en) * | 2013-10-12 | 2014-05-28 | 北奔重型汽车集团有限公司 | Pneumatic parking system |
| CN104175936A (en) * | 2014-08-22 | 2014-12-03 | 中国重汽集团成都王牌商用车有限公司 | Control system preventing cargo box from automatic lifting during dumper running |
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2021
- 2021-10-31 CN CN202111278964.9A patent/CN113830060B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101263034A (en) * | 2005-07-20 | 2008-09-10 | 克诺尔商用车制动系统有限公司 | Pneumatic braking system for a commercial vehicle |
| CN201934644U (en) * | 2011-03-04 | 2011-08-17 | 东风汽车有限公司 | Electric control system of gas circuit of front auxiliary box of transmission |
| CN103287418A (en) * | 2013-07-01 | 2013-09-11 | 王石麟 | Automobile automatic emergency auxiliary braking device |
| CN203611969U (en) * | 2013-10-12 | 2014-05-28 | 北奔重型汽车集团有限公司 | Pneumatic parking system |
| CN104175936A (en) * | 2014-08-22 | 2014-12-03 | 中国重汽集团成都王牌商用车有限公司 | Control system preventing cargo box from automatic lifting during dumper running |
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| CN113830060B (en) | 2022-08-12 |
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