CN114516318A - Control system and method for parking release detection - Google Patents
Control system and method for parking release detection Download PDFInfo
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- CN114516318A CN114516318A CN202210198494.3A CN202210198494A CN114516318A CN 114516318 A CN114516318 A CN 114516318A CN 202210198494 A CN202210198494 A CN 202210198494A CN 114516318 A CN114516318 A CN 114516318A
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- parking
- air pressure
- switch
- pressure switch
- relay valve
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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
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
- B60R16/00—Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for
- B60R16/02—Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for electric constitutive elements
- B60R16/023—Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for electric constitutive elements for transmission of signals between vehicle parts or subsystems
- B60R16/0231—Circuits relating to the driving or the functioning of the vehicle
- B60R16/0232—Circuits relating to the driving or the functioning of the vehicle for measuring vehicle parameters and indicating critical, abnormal or dangerous conditions
Abstract
The invention belongs to the technical field of electronic control of an automobile chassis, and particularly provides a control system and a control method for parking release detection, wherein the method comprises the following steps: judging the state of a parking brake switch according to the configuration selection of a parking low-pressure alarm air pressure switch and a parking relay valve air pressure switch; when the parking brake switch is closed, the position of the fault mark is 0, and the instrument does not give an alarm; when the parking brake switch is switched off, a parking low-pressure alarm air pressure switch signal and/or a parking relay valve air pressure switch signal are/is acquired, the air pressure switch signal is logically judged, and a fault marker bit is output and a forwarding instrument is used for displaying. The automobile brake device effectively prevents the phenomenon that the parking state is not completely released after the current commercial vehicle driver feeds back excessive hand brake, so that the brake is overheated in the driving process, even the fire accident is caused, and the driving safety of the driver is guaranteed.
Description
Technical Field
The invention relates to the technical field of electronic control of automobile chassis, in particular to a parking release detection control system and method.
Background
With the development requirement of economic construction, commercial vehicles create more and more social values by the characteristics of large load capacity, long driving mileage and high cost performance.
At present, in the process of tracking the market use of commercial vehicle users, drivers often feed back, and after hand brakes are loosened, the parking state is not completely released, so that the braking is overheated in the driving process, even the fire accident is caused, and the life safety of the drivers is seriously threatened.
Disclosure of Invention
The parking release detection control system and method are provided from a control perspective, aiming at the problems that after a hand brake is loosened, the parking state is not completely released, so that the brake is overheated in the driving process, even an ignition accident is caused, and the life safety of a driver is seriously threatened.
The technical scheme of the invention is as follows:
on one hand, the technical scheme of the invention provides a control system for parking release detection, which comprises a chassis domain controller, a parking brake switch, a parking low-pressure alarm air pressure switch, a parking relay valve air pressure switch and an instrument, wherein the parking brake switch, the parking low-pressure alarm air pressure switch, the parking relay valve air pressure switch and the instrument are communicated with the chassis domain controller;
the chassis domain controller is used for determining whether the parking low-pressure alarm air pressure switch and the parking relay valve air pressure switch work simultaneously or not through a calibration value; acquiring the state of a parking brake switch, determining whether to give an instrument alarm according to the acquired state of the parking brake switch, or acquiring a parking low-pressure alarm air pressure switch signal and a parking relay valve air pressure switch signal according to the acquired state of the parking brake switch, performing logic judgment on the air pressure switch signal, and determining whether to give an instrument alarm.
Further, the chassis domain controller is used for determining whether the parking low-pressure alarm air pressure switch and the parking relay valve air pressure switch work simultaneously or not through a calibration value, and when the calibration value is 1, the parking low-pressure alarm air pressure switch and the parking relay valve air pressure switch work simultaneously; when the calibration value is 0, only the pneumatic switch of the parking relay valve works.
Further, the chassis domain controller is also used for acquiring the parking brake switch state by reading the CAN message, and when the parking brake switch state is 1, the parking brake switch is closed; when the switch state is 0, the parking brake switch is turned off.
And further, the chassis domain controller is also used for setting the fault mark to 0 and controlling the instrument to display no alarm when the parking brake switch is judged to be closed.
And further, the chassis domain controller is also used for collecting a parking low-pressure alarm air pressure switch signal and a parking relay valve air pressure switch signal when the parking brake switch is judged to be disconnected, or collecting the parking relay valve air pressure switch signal, carrying out logic judgment on the air pressure switch signal and determining whether to carry out instrument alarm.
Further, the chassis domain controller is respectively connected with the low-pressure alarm air pressure switch and the parking relay valve air pressure switch through hard wires and is used for acquiring a pressure value of the parking low-pressure alarm air pressure switch and a pressure value of the parking relay valve air pressure switch.
Further, the chassis domain controller is used for judging that the obtained pressure value is smaller than a corresponding calibration threshold value, sending the fault mark position 1 to the instrument for alarm display through the external communication CAN; and when the pressure value is greater than or equal to the corresponding calibration threshold value, the position of the fault mark is 0, and the instrument does not give an alarm.
On the other hand, the technical scheme of the invention provides a control method for parking release detection, which comprises the following steps:
judging the state of a parking brake switch according to the configuration selection of a parking low-pressure alarm air pressure switch and a parking relay valve air pressure switch;
when the parking brake switch is closed, the position of the fault mark is 0, and the instrument has no alarm;
when the parking brake switch is switched off, a parking low-pressure alarm air pressure switch signal and/or a parking relay valve air pressure switch signal are/is acquired, the air pressure switch signal is logically judged, and a fault marker bit is output and a forwarding instrument is used for displaying.
Further, the step of judging the state of the parking brake switch according to the configuration selection of the parking low-pressure alarm air pressure switch and the parking relay valve air pressure switch comprises the following steps:
determining whether the parking low-pressure alarm air pressure switch and the parking relay valve air pressure switch work simultaneously or not through a calibration value of a specific calibration quantity;
When the calibration value is 1, the parking low-pressure alarm air pressure switch and the parking relay valve air pressure switch work simultaneously; judging the state of a parking brake switch;
and when the calibration value is 0, only the air pressure switch of the parking relay valve works, and the state of the parking brake switch is judged.
Further, when the parking brake switch is disconnected, the steps of collecting parking low-pressure alarm air pressure switch signals and/or parking relay valve air pressure switch signals, carrying out logic judgment on the air pressure switch signals, outputting fault marker bits and transmitting an instrument to display comprise:
when the parking low-pressure alarm air pressure switch and the parking relay valve air pressure switch work simultaneously and the parking brake switch is disconnected, acquiring a pressure value of the parking low-pressure alarm air pressure switch and a pressure value of the parking relay valve air pressure switch; when the obtained pressure value is smaller than the corresponding calibration threshold value, the fault mark position 1 is sent to an instrument for alarm display through an external communication CAN; when the obtained pressure value is greater than or equal to the corresponding calibration threshold value, the fault mark position is 0, and the instrument does not give an alarm;
when only the parking relay valve air pressure switch works and the parking brake switch is disconnected, acquiring a pressure value of the parking relay valve air pressure switch; when the obtained pressure value is smaller than the calibration threshold value, the fault mark position 1 is sent to an instrument for alarm display through an external communication CAN; and when the obtained pressure value is greater than or equal to the calibration threshold value, the fault mark position is 0, and the instrument does not give an alarm.
According to the configuration selection of the parking low-pressure alarm air pressure switch and the parking relay valve air pressure switch in the chassis domain controller, when the parking brake switch is closed, the instrument does not give an alarm; when the parking brake switch is switched off, the chassis domain controller collects a parking low-pressure alarm air pressure switch signal or a parking relay valve air pressure switch signal, the input switch signal is logically judged in the controller, and a fault flag bit is output and an instrument is forwarded to display. The automobile parking device effectively prevents the occurrence of fire accidents caused by brake overheating in the driving process even after the driver of the commercial vehicle feeds back excessive hand brake release but the parking state is not completely released, thereby ensuring the driving safety of the driver.
According to the technical scheme, the invention has the following advantages: the existing chassis component is utilized, and the real-time detection of the parking release state is realized mainly from the perspective of logic judgment; according to the configuration selection of the parking low-pressure alarm air pressure switch and the parking relay valve air pressure switch in the chassis domain controller, when the parking brake switch is closed, the instrument does not give an alarm; when the parking brake switch is disconnected, the chassis domain controller collects a parking low-pressure alarm air pressure switch signal or a parking relay valve air pressure switch signal, logic judgment is carried out on an input pressure signal in the controller, a fault flag bit is output, and a forwarding instrument displays the fault flag bit.
The invention effectively prevents the occurrence of fire accidents even braking overheating in the driving process caused by incomplete release of the parking state after the current commercial vehicle driver feeds back excessive hand brake, thereby ensuring the driving safety of the driver and being suitable for large-scale application.
In addition, the invention has reliable design principle, simple structure and very wide application prospect.
Therefore, compared with the prior art, the invention has prominent substantive features and remarkable progress, and the beneficial effects of the implementation are also obvious.
Drawings
In order to more clearly illustrate the embodiments or technical solutions in the prior art of the present invention, the drawings used in the description of the embodiments or prior art will be briefly described below, and it is obvious for those skilled in the art that other drawings can be obtained based on these drawings without creative efforts.
FIG. 1 is a schematic flow diagram of a method of one embodiment of the invention.
Detailed Description
The parking release detection control system and method are provided from a control perspective, aiming at the problems that after a hand brake is loosened, the parking state is not completely released, so that the brake is overheated in the driving process, even an ignition accident is caused, and the life safety of a driver is seriously threatened. According to the configuration selection of a parking low-pressure alarm air pressure switch and a parking relay valve air pressure switch in a chassis domain controller, when a parking brake switch is closed, an instrument does not give an alarm; when the parking brake switch is disconnected, the chassis domain controller collects a parking low-pressure alarm air pressure switch signal or a parking relay valve air pressure switch signal, logic judgment is carried out on an input pressure signal in the controller, a fault flag bit is output, and a forwarding instrument displays the fault flag bit. In order to make those skilled in the art better understand the technical solution of the present invention, the technical solution in the embodiment of the present invention will be clearly and completely described below with reference to the drawings in the embodiment of the present invention, and it is obvious that the described embodiment is only a part of the embodiment of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The embodiment of the invention provides a control system for parking release detection, which comprises a chassis domain controller, a parking brake switch, a parking low-pressure alarm air pressure switch, a parking relay valve air pressure switch and an instrument, wherein the parking brake switch, the parking low-pressure alarm air pressure switch, the parking relay valve air pressure switch and the instrument are communicated with the chassis domain controller;
the chassis domain controller is used for determining whether the parking low-pressure alarm air pressure switch and the parking relay valve air pressure switch work simultaneously or not through a calibration value; acquiring the state of a parking brake switch, determining whether to give an instrument alarm according to the acquired state of the parking brake switch, or acquiring a parking low-pressure alarm air pressure switch signal and a parking relay valve air pressure switch signal according to the acquired state of the parking brake switch, performing logic judgment on the air pressure switch signal, and determining whether to give an instrument alarm.
In some embodiments, the chassis domain controller is used for determining whether the parking low-pressure warning air switch and the parking relay valve air switch work simultaneously or not through a calibration value, and when the calibration value is 1, the parking low-pressure warning air switch and the parking relay valve air switch work simultaneously; when the calibration value is 0, only the pneumatic switch of the parking relay valve works.
In some embodiments, the chassis domain controller is further configured to obtain a parking brake switch state by reading the CAN message, and when the parking brake switch state is 1, the parking brake switch is turned on; when the switch state is 0, the parking brake switch is turned off.
In some embodiments, the chassis domain controller is further used for setting the fault flag to be 0 when the parking brake switch is judged to be closed, and controlling the instrument to have no alarm display.
In some embodiments, the chassis domain controller is further configured to collect a parking low pressure alarm air pressure switch signal and a parking relay valve air pressure switch signal when the parking brake switch is judged to be switched off, or collect the parking relay valve air pressure switch signal and perform logic judgment on the air pressure switch signal to determine whether to perform instrument alarm.
In some embodiments, the chassis domain controller is respectively connected with the low-pressure warning air pressure switch and the parking relay valve air pressure switch through hard wires and is used for acquiring the pressure value of the parking low-pressure warning air pressure switch and the pressure value of the parking relay valve air pressure switch. After the parking brake switch is disconnected, the chassis domain controller collects a pressure signal of the parking low-pressure alarm air pressure switch, and further, the chassis domain controller is connected through a hard wire to obtain a pressure value of the parking low-pressure alarm air pressure switch; after the parking brake switch is disconnected, the chassis domain controller collects parking relay valve air pressure switch signals, and further, the chassis domain controller is connected through a hard wire to obtain a parking relay valve air pressure switch pressure value.
In some embodiments, the chassis domain controller is configured to determine that the obtained pressure value is smaller than a corresponding calibration threshold value, send the fault flag position 1 to the instrument through the external communication CAN, and perform alarm display; and when the pressure value is greater than or equal to the corresponding calibration threshold value, the position of the fault mark is 0, and the instrument does not give an alarm.
When the pressure value of the parking low-pressure alarm air pressure switch is judged to be smaller than the calibration threshold value, the parking low-pressure alarm air pressure switch fault indicating position 1 is sent to an instrument through an external communication CAN to be displayed in an alarm mode, and when the pressure value of the parking low-pressure alarm air pressure switch is larger than or equal to the calibration threshold value, the parking low-pressure alarm air pressure switch fault indicating position 0 is not displayed in an alarm mode.
And when the pressure value of the pneumatic switch of the parking relay valve is judged to be smaller than the calibration threshold value, the position 1 of the pneumatic switch fault indication of the parking relay valve is sent to an instrument for alarm display through an external communication CAN, and when the pressure value of the pneumatic switch of the parking relay valve is larger than or equal to the calibration threshold value, the position 0 of the pneumatic switch fault indication of the parking relay valve is not alarmed.
As shown in fig. 1, the present invention provides a control method for parking release detection, including the steps of:
Judging the state of a parking brake switch according to the configuration selection of a parking low-pressure alarm air pressure switch and a parking relay valve air pressure switch;
when the parking brake switch is closed, the position of the fault mark is 0, and the instrument does not give an alarm;
when the parking brake switch is switched off, a parking low-pressure alarm air pressure switch signal and/or a parking relay valve air pressure switch signal are/is acquired, the air pressure switch signal is logically judged, and a fault marker bit is output and a forwarding instrument is used for displaying.
In some embodiments, the step of determining the state of the parking brake switch based on a selection of a configuration of the parking low pressure warning air switch and the parking relay valve air switch comprises:
determining whether the parking low-pressure alarm air pressure switch and the parking relay valve air pressure switch work simultaneously or not through a calibration value of a specific calibration quantity;
when the calibration value is 1, the parking low-pressure alarm air pressure switch and the parking relay valve air pressure switch work simultaneously; judging the state of a parking brake switch;
and when the calibration value is 0, only the air pressure switch of the parking relay valve works, and the state of the parking brake switch is judged.
In some embodiments, when the parking brake switch is turned off, the steps of collecting a parking low-pressure warning air pressure switch signal and/or a parking relay valve air pressure switch signal, performing logic judgment on the air pressure switch signal, outputting a fault flag bit and transmitting an instrument to display comprise:
When the parking low-pressure alarm air pressure switch and the parking relay valve air pressure switch work simultaneously and the parking brake switch is switched off, acquiring a pressure value of the parking low-pressure alarm air pressure switch and a pressure value of the parking relay valve air pressure switch; when the obtained pressure value is smaller than the corresponding calibration threshold value, the fault mark position 1 is sent to the instrument for alarm display through the external communication CAN; when the obtained pressure value is greater than or equal to the corresponding calibration threshold value, the fault mark position is 0, and the instrument does not give an alarm;
when only the parking relay valve air pressure switch works and the parking brake switch is disconnected, acquiring a pressure value of the parking relay valve air pressure switch; when the obtained pressure value is smaller than the calibration threshold value, the fault mark position 1 is sent to an instrument for alarm display through an external communication CAN; and when the obtained pressure value is greater than or equal to the calibration threshold value, the fault mark position is 0, and the instrument does not give an alarm.
When the pressure value of the parking low-pressure alarm air pressure switch is judged to be smaller than the calibration threshold value, the parking low-pressure alarm air pressure switch fault indicating position 1 is sent to an instrument through an external communication CAN to be displayed in an alarm mode, and when the pressure value of the parking low-pressure alarm air pressure switch is larger than or equal to the calibration threshold value, the parking low-pressure alarm air pressure switch fault indicating position 0 is not displayed in an alarm mode.
When the pressure value of the air pressure switch of the parking relay valve is judged to be smaller than the calibration threshold value, the position 1 of the air pressure switch fault indication of the parking relay valve is sent to an instrument through an external communication CAN to be displayed in an alarm mode, and when the pressure value of the air pressure switch of the parking relay valve is larger than or equal to the calibration threshold value, the position 0 of the air pressure switch fault indication of the parking relay valve is not displayed in an alarm mode.
According to the configuration selection of the parking low-pressure alarm air pressure switch and the parking relay valve air pressure switch in the chassis domain controller, when the parking brake switch is closed, the instrument does not give an alarm; when the parking brake switch is disconnected, the chassis domain controller collects a parking low-pressure alarm air pressure switch signal or a parking relay valve air pressure switch signal, logic judgment is carried out on an input switch signal in the controller, and a fault flag bit is output and a forwarding instrument is used for displaying. The automobile brake device effectively prevents the phenomenon that the parking state is not completely released after the current commercial vehicle driver feeds back excessive hand brake, so that the brake is overheated in the driving process, even the fire accident is caused, and the driving safety of the driver is guaranteed.
Although the present invention has been described in detail in connection with the preferred embodiments with reference to the accompanying drawings, the present invention is not limited thereto. Various equivalent modifications or substitutions can be made on the embodiments of the present invention by those skilled in the art without departing from the spirit and scope of the present invention, and these modifications or substitutions are within the scope of the present invention/any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the appended claims.
Claims (10)
1. A control system for parking release detection is characterized by comprising a chassis domain controller, a parking brake switch, a parking low-pressure alarm air pressure switch, a parking relay valve air pressure switch and an instrument, wherein the parking brake switch, the parking low-pressure alarm air pressure switch, the parking relay valve air pressure switch and the instrument are communicated with the chassis domain controller;
the chassis domain controller is used for determining whether the parking low-pressure alarm air pressure switch and the parking relay valve air pressure switch work simultaneously or not through a calibration value; and acquiring the state of a parking brake switch, determining whether to alarm the instrument according to the acquired state of the parking brake switch, or acquiring a parking low-pressure alarm air pressure switch signal and a parking relay valve air pressure switch signal according to the acquired state of the parking brake switch, performing logic judgment on the air pressure switch signal, and determining whether to alarm the instrument.
2. The parking release detection control system according to claim 1, wherein the chassis domain controller is configured to determine whether the parking low pressure warning air switch and the parking relay valve air switch are simultaneously operated by a calibration value, and when the calibration value is 1, the parking low pressure warning air switch and the parking relay valve air switch are simultaneously operated; when the calibration value is 0, only the pneumatic switch of the parking relay valve works.
3. The parking release detection control system according to claim 2, wherein the chassis domain controller is further configured to obtain a parking brake switch state by reading the CAN message, and when the parking brake switch state is 1, the parking brake switch is turned on; when the parking brake switch state is 0, the parking brake switch is turned off.
4. The parking release detection control system according to claim 3, wherein the chassis domain controller is further configured to set the fault flag to 0 and control the instrument to display no alarm when it is determined that the parking brake switch is turned off.
5. The parking release detection control system according to claim 4, wherein the chassis domain controller is further configured to collect a parking low pressure warning air pressure switch signal and a parking relay valve air pressure switch signal when the parking brake switch is judged to be turned off, or collect a parking relay valve air pressure switch signal and perform logic judgment on the air pressure switch signal to determine whether to perform instrument warning.
6. The parking release detection control system according to claim 1, wherein the chassis domain controller is respectively connected with the low-pressure warning air pressure switch and the parking relay valve air pressure switch through hard wires and is used for acquiring a parking low-pressure warning air pressure switch pressure value and a parking relay valve air pressure switch pressure value.
7. The parking release detection control system according to claim 6, wherein the chassis domain controller is configured to determine that the obtained pressure value is smaller than a corresponding calibration threshold value, send a fault flag position 1 to the instrument for alarm display through an external communication CAN; and when the pressure value is greater than or equal to the corresponding calibration threshold value, the position of the fault mark is 0, and the instrument does not give an alarm.
8. A control method of parking release detection, characterized by comprising the steps of:
judging the state of a parking brake switch according to the configuration selection of a parking low-pressure alarm air pressure switch and a parking relay valve air pressure switch;
when the parking brake switch is closed, the position of the fault mark is 0, and the instrument has no alarm;
when the parking brake switch is switched off, a parking low-pressure alarm air pressure switch signal and/or a parking relay valve air pressure switch signal are/is collected, the air pressure switch signal is logically judged, and a fault marker bit is output and a forwarding instrument is used for displaying.
9. The parking release detection control method according to claim 8, wherein the step of determining the state of the parking brake switch according to the configuration selection of the parking low pressure warning air pressure switch and the parking relay valve air pressure switch includes:
Determining whether the parking low-pressure alarm air pressure switch and the parking relay valve air pressure switch work simultaneously or not through a calibration value of a specific calibration quantity;
when the calibration value is 1, the parking low-pressure alarm air pressure switch and the parking relay valve air pressure switch work simultaneously; judging the state of a parking brake switch;
when the calibration value is 0, only the air pressure switch of the parking relay valve works, and the state of the parking brake switch is judged.
10. The parking release detection control method according to claim 9, wherein the step of collecting a parking low pressure warning air pressure switch signal and/or a parking relay valve air pressure switch signal when the parking brake switch is turned off, performing logic judgment on the air pressure switch signal, outputting a fault flag bit and displaying a forwarding instrument comprises:
when the parking low-pressure alarm air pressure switch and the parking relay valve air pressure switch work simultaneously and the parking brake switch is disconnected, acquiring a pressure value of the parking low-pressure alarm air pressure switch and a pressure value of the parking relay valve air pressure switch; when the obtained pressure value is smaller than the corresponding calibration threshold value, the fault mark position 1 is sent to an instrument for alarm display through an external communication CAN; when the obtained pressure value is greater than or equal to the corresponding calibration threshold value, the fault mark position is 0, and the instrument does not give an alarm;
When only the parking relay valve air pressure switch works and the parking brake switch is disconnected, acquiring a pressure value of the parking relay valve air pressure switch; when the obtained pressure value is smaller than the calibration threshold value, the fault mark position 1 is sent to an instrument for alarm display through an external communication CAN; and when the obtained pressure value is greater than or equal to the calibration threshold value, the fault mark position is 0, and the instrument does not give an alarm.
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| CN202210198494.3A CN114516318B (en) | 2022-03-01 | 2022-03-01 | Control system and method for parking release detection |
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| CN202210198494.3A CN114516318B (en) | 2022-03-01 | 2022-03-01 | Control system and method for parking release detection |
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