CN113353045B - Commercial vehicle after-loading gas circuit braking auxiliary system and method - Google Patents
Commercial vehicle after-loading gas circuit braking auxiliary system and method Download PDFInfo
- Publication number
- CN113353045B CN113353045B CN202110910773.3A CN202110910773A CN113353045B CN 113353045 B CN113353045 B CN 113353045B CN 202110910773 A CN202110910773 A CN 202110910773A CN 113353045 B CN113353045 B CN 113353045B
- Authority
- CN
- China
- Prior art keywords
- axle brake
- air chamber
- chamber
- pressure
- brake
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Classifications
-
- 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
- B60T13/00—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems
- B60T13/10—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems with fluid assistance, drive, or release
- B60T13/66—Electrical control in fluid-pressure brake systems
- B60T13/68—Electrical control in fluid-pressure brake systems by electrically-controlled valves
- B60T13/683—Electrical control in fluid-pressure brake systems by electrically-controlled valves in pneumatic systems or parts thereof
Abstract
The invention relates to the field of braking of commercial vehicles, in particular to a rear-mounted gas circuit braking auxiliary system and a method of a commercial vehicle, wherein the system comprises the following components: an AEB controller and a quick release valve; the method comprises the following steps: when the AEB controller detects a driving danger signal, determining a multi-stage braking strategy; determining target pressure intensity and pressure relief pressure intensity of a rear axle brake air chamber and/or a front axle brake air chamber; transmitting the gas of a spare gas storage tank of the factory commercial vehicle to the rear axle brake chamber and/or the front axle brake chamber through a quick release valve; after the target pressure intensity is detected, closing an air path from the spare air storage tank to the rear axle brake air chamber and/or the front axle brake air chamber; and controlling the pressure relief of the front axle brake air chamber and/or the rear axle brake air chamber to reach the pressure relief pressure. In the embodiment, the AEB controller and the quick release valve are additionally arranged on the basis of an original vehicle of a factory-leaving commercial vehicle, and the auxiliary method for graded braking of the rear-loading gas circuit of the commercial vehicle is realized by using the spare gas storage tank.
Description
Technical Field
The invention relates to the field of braking of commercial vehicles, in particular to a rear-mounted gas circuit braking auxiliary system and method of a commercial vehicle.
Background
Compared to passenger vehicles, Autonomous Emergency Braking (AEB) development of commercial vehicles is relatively delayed. The AEB loading rate of the commercial vehicle is not high due to the problems of technology, cost, suppliers and the like. In 2020, the traffic department requires forced installation of AEB function for trucks with total mass of more than 12 tons and maximum vehicle speed of more than 90km/h, and the installation node is clear in 2021. It can be seen that the legislation has become increasingly important and sophisticated with regard to the active safety requirements of commercial vehicles.
At present, hydraulic braking is almost adopted for mature AEB functions, the hydraulic braking structure is simple, the occupied space is small, and oil leakage of an oil pipeline is easy. If the brake master cylinder is not installed on a commercial vehicle, the brake master cylinder is enlarged, and a vacuum booster with stronger performance is redesigned to provide the required braking force. In addition, like the semitrailer, the brake pipe of the trailer is connected to the head of the semitrailer, but the metal oil pipe of the hydraulic brake cannot be bent. This makes it increasingly difficult to implement AEB functions on commercial vehicles.
In view of the above, the present invention is particularly proposed.
Disclosure of Invention
The embodiment of the invention provides a commercial vehicle after-loading gas circuit braking auxiliary system and method, which are used for realizing a commercial vehicle after-loading gas circuit graded braking auxiliary method.
In order to achieve the purpose, the invention adopts the following technical scheme:
in a first aspect, the invention provides a method for assisting in braking a rear-mounted gas circuit of a commercial vehicle, which is applied to a rear-mounted gas circuit braking assisting system of the commercial vehicle, and the system comprises: an AEB controller and a quick release valve; the air inlet of the AEB controller is connected with a spare air storage tank of a factory commercial vehicle, and the air outlet of the AEB controller is connected with the air inlet of the quick release valve; a first air outlet of the quick release valve is connected with a rear axle brake air chamber of the factory commercial vehicle, and a second air outlet of the quick release valve is connected with a front axle brake air chamber of the factory commercial vehicle;
the method comprises the following steps:
determining a multi-stage braking strategy when the AEB controller detects a driving hazard signal; determining target pressure and pressure relief pressure of the rear axle brake chamber and/or the front axle brake chamber according to the multi-stage braking strategy;
the AEB controller transmits the gas of the spare gas storage tank to the rear axle brake chamber and/or the front axle brake chamber through a quick release valve;
after the AEB controller detects that the rear axle brake air chamber and/or the front axle brake air chamber reach the target pressure, the air path from the spare air storage tank to the rear axle brake air chamber and/or the front axle brake air chamber is closed;
and when the AEB controller detects that the pressure relief condition is met, the AEB controller controls the pressure relief of the front axle brake air chamber and/or the rear axle brake air chamber to reach the pressure relief pressure.
In a second aspect, the present invention provides a commercial vehicle after-loading gas circuit braking auxiliary system, including: an AEB controller and a quick release valve; the air inlet of the AEB controller is connected with a spare air storage tank of a factory commercial vehicle, and the air outlet of the AEB controller is connected with the air inlet of the quick release valve; a first air outlet of the quick release valve is connected with a rear axle brake air chamber of the factory commercial vehicle, and a second air outlet of the quick release valve is connected with a front axle brake air chamber of the factory commercial vehicle;
the AEB controller is used for determining a multi-stage braking strategy when the driving danger signal is detected; determining target pressure and pressure relief pressure of the rear axle brake chamber and/or the front axle brake chamber according to the multi-stage braking strategy; transmitting the gas of the spare gas storage tank to the rear axle brake chamber and/or the front axle brake chamber through a quick release valve; after the rear axle brake air chamber and/or the front axle brake air chamber reach the target pressure intensity, closing an air path from the spare air storage tank to the rear axle brake air chamber and/or the front axle brake air chamber; and when the pressure relief condition is met, controlling the pressure relief of the front axle brake air chamber and/or the rear axle brake air chamber to reach the pressure relief pressure.
Compared with the prior art, the invention has the beneficial effects that:
according to the embodiment, the AEB controller and the quick release valve are additionally arranged on the original vehicle of the factory-leaving commercial vehicle, a multi-stage control strategy is configured in the AEB controller, the quick release valve is controlled by utilizing gas in a spare gas storage tank of the factory-leaving commercial vehicle according to the multi-stage control strategy, and pressure building and pressure release are carried out on a rear axle brake chamber and/or a front axle brake chamber, so that the auxiliary method for graded brake of the rear-loading gas circuit of the commercial vehicle is realized.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.
FIG. 1 is a flow chart of a method for assisting a rear-loading gas circuit brake of a commercial vehicle according to an embodiment of the present invention;
FIG. 2 is a schematic structural diagram of a rear-mounted gas circuit brake auxiliary system of a commercial vehicle;
FIG. 3 is a schematic diagram of another method for assisting a rear-loading air path brake of a commercial vehicle according to an embodiment of the present invention;
FIG. 4 is a brake pressure curve for novice, professional and skilled drivers;
FIG. 5 is a schematic structural diagram of a rear-mounted pneumatic brake assist system of a commercial vehicle according to an embodiment of the present invention;
fig. 6 is a schematic diagram of a change in an absolute value of deceleration of the host vehicle during an inching brake reminder according to an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the technical solutions of the present invention will be clearly and completely described below. It is to be understood that the described embodiments are merely exemplary of the invention, and not restrictive of the full scope of the invention. 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.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; 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 in specific cases to those skilled in the art.
Fig. 1 is a flowchart of a method for assisting in braking a commercial vehicle after loading a gas circuit brake, which is applicable to a situation where a commercial vehicle after leaving a factory is equipped with a gas circuit brake assist system. Fig. 2 is a schematic structural diagram of a rear-mounted air path brake auxiliary system of a commercial vehicle, and in the structural aspect, on the basis of an original vehicle of a factory commercial vehicle, an AEB controller and a quick release valve are additionally installed in the embodiment, and structures such as an ABS and front and rear axle brake air chambers of the original vehicle are not changed. The original vehicle structure of the factory commercial vehicle comprises a rear axle brake air chamber and a front axle brake air chamber. Referring to fig. 2, an air inlet of the AEB controller is connected to a spare air storage tank (which can be used for a clutch booster pump, an air horn, an air seat and the like) of a factory commercial vehicle, and an air outlet of the AEB controller is connected to an air inlet of the quick release valve; the first gas outlet of the quick release valve is connected with a rear axle brake chamber of the factory commercial vehicle, and the second gas outlet of the quick release valve is connected with a front axle brake chamber of the factory commercial vehicle.
With reference to fig. 1 and 2, the method provided by the present embodiment includes:
s110, when the AEB controller detects a driving danger signal, determining a multi-stage braking strategy; and determining the target pressure and the pressure relief pressure of the rear axle brake chamber and/or the front axle brake chamber according to the multi-stage braking strategy.
The AEB controller accesses the vehicle CAN network and may receive driving hazard signals from the CAN network, such as an approach to the vehicle signal, which may require vehicle braking. The embodiment creatively determines a multi-stage braking strategy, and adopts different braking strategies to carry out time-sharing and stage-by-stage control on the factory commercial vehicle. Different target pressures and relief pressures correspond to different phases of the braking strategy. The target pressure is the pressure established by connecting the rear axle brake chamber and/or the front axle brake chamber through the air passage, and the pressure relief pressure is the pressure achieved after exhausting the air in the rear axle brake chamber and/or the front axle brake chamber through the air passage.
And S120, transmitting the gas in the spare gas storage tank to the rear axle brake chamber and/or the front axle brake chamber through a quick release valve by the AEB controller.
This embodiment allows for pressure build-up/release in either the rear axle brake chamber, the front axle brake chamber, or both. In practical application, the condition that the commercial vehicle is heavy in load and the mass center is close to the rear is considered, and pressure building/pressure relief can be carried out on a rear axle brake air chamber only in order to avoid locking of front wheels.
The front axle brake air chamber comprises a left front brake air chamber and a right front brake air chamber, and the rear axle brake air chamber comprises a left rear brake air chamber and a right rear brake air chamber.
S130, after the AEB controller detects that the rear axle brake air chamber and/or the front axle brake air chamber reach the target pressure, the air path from the spare air storage tank to the rear axle brake air chamber and/or the front axle brake air chamber is closed.
And an air pressure sensor is arranged in the rear axle brake air chamber and/or the front axle brake air chamber, and transmits a pressure intensity signal to the AEB controller in real time. And when the AEB controller detects a target pressure signal, closing the air path from the spare air storage tank to the rear axle brake air chamber and/or the front axle brake air chamber.
And S140, when the AEB controller detects that the pressure relief condition is met, controlling the pressure relief of the front axle brake air chamber and/or the rear axle brake air chamber to reach the pressure relief pressure.
According to the embodiment, the AEB controller and the quick release valve are additionally arranged on the basis of an original commercial vehicle leaving a factory, a multi-stage control strategy is configured in the AEB controller, and the quick release valve is controlled by utilizing gas in a spare gas storage tank according to the multi-stage control strategy to build and release pressure for a rear axle brake chamber and/or a front axle brake chamber, so that the auxiliary method for graded braking of a rear-mounted gas circuit of the commercial vehicle is realized.
It should be noted that, although the AEB function is also installed in the current commercial vehicle, the AEB function is fully integrated with the vehicle structure in the front-loading process, for example, the AEB function is embedded in the main control ECU, the front axle control module and the rear axle control module, and the precise control of the air pressure of the four-wheel air chamber is realized by designing a specific air path connection. This embodiment leaves the factory at the commercial car that does not have the AEB function after, reforms transform original structure and can bring very big difficulty, through the mode of simple AEB controller of installing additional and quick release valve, with original reserve gas holder perfect adaptation, realizes the AEB function on the basis of original braking gas circuit. The reason for not using the front axle air tank or the rear axle air tank is that the manual braking characteristic of the original vehicle is not changed.
Fig. 3 is a schematic diagram of another method for assisting the after-loading air path braking of a commercial vehicle according to an embodiment of the present invention, which details a multi-stage braking strategy and specifically includes the following operations:
and S200, starting.
S210, when the AEB controller detects the driving danger signal, judging whether a pedal braking signal is detected or not. If yes, jumping to S270; if not, go to S220.
When a driver steps on the brake pedal, a pedal brake signal is generated and transmitted to the AEB controller through the CAN network.
S220, determining a pre-filling braking strategy; a first target pressure of the rear axle and/or front axle brake chambers is determined according to a pre-fill braking strategy.
The first target pressure may be obtained by calibration. And in the process that the rear axle brake air chamber and/or the front axle brake air chamber reach the first target pressure, reducing the clearance between the brake caliper and the brake disc. When the rear axle brake chamber and/or the front axle brake chamber reach the first target pressure, the clearance between the brake caliper and the brake disc is minimized but not contacted. The pre-fill function will only optimize the driver's brake feel, but the driver should not feel that the brake pre-fill function is active, i.e. only reduce the clearance of the brake caliper from the brake disc, but not cause any brake deceleration of the vehicle.
Fig. 4 is a brake pressure curve of a novice driver, a professional driver and a skilled driver, and fig. 4 shows brake pressure variation curves generated when three types (professional, skilled and novice) of drivers step on a brake pedal, and even though the three types of drivers step on the brake pedal at the same time, actual brake force generation time is different due to a brake gap between a brake disc and a brake caliper at a wheel. If the active anti-collision system can pre-fill proper brake pressure before collision occurs, so that the clearance between the brake caliper and the brake disc is reduced/eliminated, on one hand, the brake reaction time can be greatly shortened, and on the other hand, a novice driver can output the brake pressure close to that of a professional driver in an emergency.
Optionally, the pre-fill braking strategy is activated for no more than 10 seconds (calibrated amount) to prevent hardware system over-operation and reduce service life, and is activated without interfering with driver brake pedal operation.
Optionally, when the AEB controller detects that the driving danger signal disappears, the AEB controller controls the front axle brake chamber and/or the rear axle brake chamber to delay (for example, 4 s) pressure release, so as to prevent the prefill performance from being affected after the AEB function is repeatedly activated due to dangerous scene changes. Specifically, the quick release valve can be controlled to release pressure, so that the front axle brake chamber and the rear axle brake chamber are exhausted, and the pre-filling state is cancelled.
And S221, the AEB controller transmits the gas in the spare gas storage tank to the rear axle brake chamber and/or the front axle brake chamber through a quick release valve.
Fig. 5 is a schematic structural diagram of another rear-mounted pneumatic brake assist system for a commercial vehicle according to an embodiment of the present invention, which includes a first two-way check valve and a second two-way check valve. Two air inlets of the first two-way check valve are connected respectively the first gas outlet of the quick release valve and the rear axle gas storage tank of the factory commercial vehicle, the gas outlet is connected the rear axle brake air chamber, two air inlets of the second two-way check valve are connected respectively the second gas outlet of the quick release valve and the front axle gas storage tank of the factory commercial vehicle, the gas outlet is connected the front axle brake air chamber.
The air enters the rear axle brake air chamber through a first air outlet in the quick release valve and a first two-way check valve, and enters the front axle brake air chamber through a second air outlet in the quick release valve and a second two-way check valve.
Referring to fig. 5, a quick connector with a cut-off function is connected between the spare gas tank and the AEB controller, and the functions of gas circuit connection and reverse cut-off are achieved. A quick exhaust three-way quick connector is connected between the AEB controller and the quick release valve, and can quickly exhaust gas discharged by the AEB controller.
S222, after the AEB controller detects that the rear axle brake air chamber and/or the front axle brake air chamber reach the first target pressure, closing an air path from the spare air storage tank to the rear axle brake air chamber and/or the front axle brake air chamber.
Referring to fig. 2 and 5, the AEB controller closes its air inlet and outlet ports to maintain pressure in the rear axle brake chambers and/or the front axle brake chambers.
And S230, after the preset time length after the pre-filling, judging whether a pedal braking signal is detected or not. If yes, jumping to S270; if not, it jumps to S240.
The set time period can be obtained according to the general reaction time of the driver and can be set autonomously by the driver, for example, 2 s. If the pedal brake signal is detected within 2s, indicating that the driver is not aware of the hazard, the braking strategy is initiated from the pre-filled entry point.
S240, determining a point braking strategy; and determining a second target pressure and a pressure relief pressure of the rear axle brake air chamber and/or the front axle brake air chamber according to a point brake strategy.
The second target pressure is greater than the first target pressure, and the pressure relief pressure is less than the second target pressure. When the rear axle brake air chamber and/or the front axle brake air chamber reach a second target pressure intensity, braking force is generated on the factory-leaving commercial vehicle; and then when the pressure of the rear axle brake air chamber and/or the front axle brake air chamber is relieved to reach the pressure relief pressure, the brake force is cancelled, so that the effect of point brake reminding is achieved.
Optionally, the pressure relief pressure is equal to the first target pressure, that is, the pressure relief pressure returns to the pre-filling state after the snubbing is finished, and the state of 'braking without braking' is maintained.
Optionally, a performance requirement of the point-brake braking strategy is determined, the performance requirement comprising: maximum deceleration, activation duration, and rate of change of deceleration. FIG. 6 is a block diagram of an embodiment of the present inventionWhen the snub is reminded, the change of the absolute value of the deceleration of the vehicle (factory commercial vehicle) is shown schematically. Wherein: a ispeakIs the maximum deceleration (unit: m/s)2）；tjerkIs the activation duration, i.e. the snub duration (unit: ms); rhobld、ρrelThe deceleration rate change rate (unit: m/s) during pressure build-up and pressure release3）。
And enabling the factory commercial vehicle to meet the performance requirement, and calibrating the second target pressure and the pressure relief pressure of the rear axle brake air chamber and/or the front axle brake air chamber. Specifically, in the process of the real-vehicle test,
and S241, the AEB controller transmits the gas of the spare gas storage tank to the rear axle brake chamber and/or the front axle brake chamber through a quick release valve.
And S242, after the AEB controller detects that the rear axle brake air chamber and/or the front axle brake air chamber reach a second target pressure, closing an air path from the spare air storage tank to the rear axle brake air chamber and/or the front axle brake air chamber.
S241 and S242 refer to S221 and S222 described above.
And S243, when the AEB controller detects that the pressure relief condition is met, controlling the pressure relief of the front axle brake air chamber and/or the rear axle brake air chamber to reach the pressure relief pressure.
Referring to fig. 5, the first/second two-way check valves are connected with corresponding brake air chambers through relay valves, the AEB has a control function on the relay valves, and the connected brake air chambers are decompressed through controlling the relay valves.
And if the continuous snubbing duration reaches the activation duration, or the factory-leaving commercial vehicle reaches the maximum deceleration, controlling the pressure relief of the front axle brake air chamber and/or the rear axle brake air chamber to reach the pressure relief pressure.
Optionally, even if the inching brake is interrupted by the driving danger signal before the brake execution process is finished, the inching brake needs to be completely executed to ensure that the driver is adequately reminded. Preferably, when the AEB controller detects that the pressure release condition is satisfied, the AEB controller controls the pressure release of the front axle brake chamber and/or the rear axle brake chamber to reach the pressure release pressure, and further includes: and when the AEB controller detects that the driving danger signal disappears, the AEB controller controls the front axle brake chamber and/or the rear axle brake chamber to delay pressure relief. For details, reference is made to the above description of the embodiments, which is not repeated herein.
And S250, judging whether a pedal braking signal is detected or not after the time length is set after the point braking. If yes, jumping to S270; if not, go to S260.
For the description of "setting the duration", reference is made to the above description of the embodiments, and details are not repeated here.
S260, determining an autonomous emergency braking strategy; and determining a third target pressure of the rear axle brake air chamber and/or the front axle brake air chamber according to an autonomous emergency braking strategy.
And when the rear axle brake air chamber and/or the front axle brake air chamber reach the third target pressure, braking force is generated on the factory-leaving commercial vehicle. The third target pressure intensity is greater than the second target pressure intensity, so that a larger and more continuous braking effect than snub braking is achieved, and finally emergency braking is achieved.
And S261, transmitting the gas in the spare gas storage tank to the rear axle brake chamber and/or the front axle brake chamber through a quick release valve by the AEB controller.
And S262, after the AEB controller detects that the rear axle brake air chamber and/or the front axle brake air chamber reach a third target pressure, closing an air path from the spare air storage tank to the rear axle brake air chamber and/or the front axle brake air chamber. And finishing the operation.
S261 and S262 refer to S221 and S222 described above.
And S270, controlling the quick release valve to release pressure so that gas in a rear axle gas storage tank of the factory-leaving commercial vehicle enters the rear axle brake chamber and/or gas in a front axle gas storage tank of the factory-leaving commercial vehicle enters the front axle brake chamber.
Referring to fig. 5, the quick release valve is controlled to release pressure through the air outlet, and meanwhile, due to the action of the original pedal, air in the rear axle air storage tank enters the rear axle brake air chamber through the first two-way check valve, and/or air in the front axle air storage tank enters the front axle brake air chamber through the second two-way check valve, so that the phenomenon that the first two-way check valve and the second two-way check valve are abutted to each other through two air inlets is avoided.
In the embodiment, when the pedal braking signal is detected, the AEB controller pressure building function is automatically quitted, and the pressure generated by the brake pedal is conducted to the brake air chamber through the bidirectional one-way valve.
According to the embodiment, through the multi-stage braking strategy, on one hand, the braking characteristic of the commercial vehicle is autonomously optimized in advance, and the feeling of the driver during emergency braking is optimized; on the other hand, the multi-dimensional and multi-level driver reminding function is realized.
On the basis of the above embodiment, an acousto-optic alarm function can be added to the multi-stage braking strategy, and the function can be executed simultaneously with a certain strategy or between any two strategies.
Referring to fig. 2, an embodiment of the present invention provides a commercial vehicle after-loading gas circuit braking auxiliary system, including: an AEB controller and a quick release valve; the air inlet of the AEB controller is connected with a spare air storage tank of a factory commercial vehicle, and the air outlet of the AEB controller is connected with the air inlet of the quick release valve; a first air outlet of the quick release valve is connected with a rear axle brake air chamber of the factory commercial vehicle, and a second air outlet of the quick release valve is connected with a front axle brake air chamber of the factory commercial vehicle;
the AEB controller is used for determining a multi-stage braking strategy when the driving danger signal is detected; determining target pressure and pressure relief pressure of the rear axle brake chamber and/or the front axle brake chamber according to the multi-stage braking strategy; transmitting the gas of the spare gas storage tank to the rear axle brake chamber and/or the front axle brake chamber through a quick release valve; after the rear axle brake air chamber and/or the front axle brake air chamber reach the target pressure intensity, closing an air path from the spare air storage tank to the rear axle brake air chamber and/or the front axle brake air chamber; and when the pressure relief condition is met, controlling the pressure relief of the front axle brake air chamber and/or the rear axle brake air chamber to reach the pressure relief pressure.
Optionally, the system further comprises a first two-way check valve and a second two-way check valve; two air inlets of the first two-way one-way valve are respectively connected with a first air outlet of the quick release valve and a rear axle air storage tank of a factory-leaving commercial vehicle, an air outlet is connected with the rear axle brake air chamber, two air inlets of the second two-way one-way valve are respectively connected with a second air outlet of the quick release valve and a front axle air storage tank of the factory-leaving commercial vehicle, and an air outlet is connected with the front axle brake air chamber; when the AEB is used for detecting a pedal braking signal, the AEB controls the quick release valve to release pressure so that gas in the rear axle gas storage tank enters the rear axle brake chamber through the first two-way one-way valve, and/or gas in the front axle gas storage tank enters the front axle brake chamber through the second two-way one-way valve.
The auxiliary system for the rear-mounted air circuit brake of the commercial vehicle provided by the embodiment can execute the auxiliary method for the rear-mounted air circuit brake of the commercial vehicle provided by any embodiment, has corresponding technical effects, and is not described herein again.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions deviate from the technical solutions of the embodiments of the present invention.
Claims (9)
1. A commercial vehicle after-loading gas circuit brake auxiliary method is applied to a commercial vehicle after-loading gas circuit brake auxiliary system, and is characterized in that the system comprises: an AEB controller and a quick release valve; the air inlet of the AEB controller is connected with a spare air storage tank of a factory commercial vehicle, and the air outlet of the AEB controller is connected with the air inlet of the quick release valve; a first air outlet of the quick release valve is connected with a rear axle brake air chamber of the factory commercial vehicle, and a second air outlet of the quick release valve is connected with a front axle brake air chamber of the factory commercial vehicle;
the method comprises the following steps:
determining a multi-stage braking strategy when the AEB controller detects a driving hazard signal; determining target pressure and pressure relief pressure of the rear axle brake chamber and/or the front axle brake chamber according to the multi-stage braking strategy;
the AEB controller transmits the gas of the spare gas storage tank to the rear axle brake chamber and/or the front axle brake chamber through a quick release valve;
after the AEB controller detects that the rear axle brake air chamber and/or the front axle brake air chamber reach the target pressure, the air path from the spare air storage tank to the rear axle brake air chamber and/or the front axle brake air chamber is closed;
when the AEB controller detects that a pressure relief condition is met, the AEB controller controls the pressure relief of the front axle brake air chamber and/or the rear axle brake air chamber to reach the pressure relief pressure;
when the AEB controller detects a driving hazard signal, determining a multi-stage braking strategy comprising:
when the AEB controller detects a driving hazard signal, if a pedal braking signal is not detected, determining a pre-filling braking strategy;
after the preset time length is obtained after the pre-filling, if the pedal braking signal is not detected yet, a brake-on braking strategy is determined;
and after the set time length after the inching brake is performed, if the pedal brake signal is not detected yet, determining an autonomous emergency brake strategy.
2. The method of claim 1, wherein said determining a target pressure and a pressure relief pressure of said rear and/or front axle brake chambers according to said multi-stage braking strategy comprises:
determining a first target pressure of the rear axle brake air chamber and/or the front axle brake air chamber according to a pre-filling brake strategy, and reducing a gap between a brake caliper and a brake disc when the rear axle brake air chamber and/or the front axle brake air chamber reach the first target pressure;
according to a point braking strategy, determining a second target pressure and a pressure relief pressure of the rear axle brake air chamber and/or the front axle brake air chamber; when the rear axle brake air chamber and/or the front axle brake air chamber reach a second target pressure intensity, braking force is generated on the factory-leaving commercial vehicle; when the pressure of the rear axle brake air chamber and/or the front axle brake air chamber is relieved to reach the relief pressure intensity, the braking force is cancelled;
determining a third target pressure of the rear axle brake air chamber and/or the front axle brake air chamber according to an autonomous emergency braking strategy; when the rear axle brake air chamber and/or the front axle brake air chamber reach the third target pressure intensity, braking force is generated on the factory-leaving commercial vehicle;
wherein the second target pressure is greater than the first target pressure, the pressure relief pressure is less than the second target pressure, and the third target pressure is greater than the second target pressure.
3. The method of claim 2, wherein the pressure relief pressure is equal to the first target pressure.
4. The method of claim 2, wherein said determining a second target pressure and a pressure relief pressure of the rear axle and/or front axle brake chambers in accordance with a point-of-brake braking strategy comprises:
determining performance requirements of a point-brake braking strategy, the performance requirements comprising: maximum deceleration, activation duration and rate of change of deceleration;
and enabling the factory commercial vehicle to meet the performance requirement, and calibrating a second target pressure and a pressure relief pressure of the rear axle brake air chamber and/or the front axle brake air chamber.
5. The method of claim 4, wherein controlling the front and/or rear axle brake chambers to relieve pressure to the relief pressure when the AEB controller detects that a relief condition is satisfied comprises:
and if the continuous snubbing duration reaches the activation duration, or the factory-leaving commercial vehicle reaches the maximum deceleration, controlling the pressure relief of the front axle brake air chamber and/or the rear axle brake air chamber to reach the pressure relief pressure.
6. The method of claim 1, wherein after the AEB controller transmits the air in the spare air tank to the rear axle brake chamber and/or front axle brake chamber through a quick release valve, or when the AEB controller detects that a pressure relief condition is met, the front axle brake chamber and/or rear axle brake chamber is controlled to be relieved to the relief pressure, the method further comprising:
and when the AEB controller detects that the driving danger signal disappears, the AEB controller controls the front axle brake chamber and/or the rear axle brake chamber to delay pressure relief.
7. The method of claim 1, further comprising:
when the AEB controller detects a pedal brake signal, the AEB controller controls the quick release valve to release pressure so that gas in a rear axle gas storage tank of a factory-leaving commercial vehicle enters the rear axle brake chamber and/or gas in a front axle gas storage tank of the factory-leaving commercial vehicle enters the front axle brake chamber.
8. The utility model provides a commercial car back-loading gas circuit braking auxiliary system which characterized in that includes: an AEB controller and a quick release valve; the air inlet of the AEB controller is connected with a spare air storage tank of a factory commercial vehicle, and the air outlet of the AEB controller is connected with the air inlet of the quick release valve; a first air outlet of the quick release valve is connected with a rear axle brake air chamber of the factory commercial vehicle, and a second air outlet of the quick release valve is connected with a front axle brake air chamber of the factory commercial vehicle;
the AEB controller is used for determining a multi-stage braking strategy when the driving danger signal is detected; determining target pressure and pressure relief pressure of the rear axle brake chamber and/or the front axle brake chamber according to the multi-stage braking strategy; transmitting the gas of the spare gas storage tank to the rear axle brake chamber and/or the front axle brake chamber through a quick release valve; after the rear axle brake air chamber and/or the front axle brake air chamber reach the target pressure intensity, closing an air path from the spare air storage tank to the rear axle brake air chamber and/or the front axle brake air chamber; when the pressure relief condition is met, controlling the pressure relief of the front axle brake air chamber and/or the rear axle brake air chamber to reach the pressure relief pressure;
when the AEB controller detects a driving hazard signal, determining a multi-stage braking strategy comprising: when the AEB controller detects a driving hazard signal, if a pedal braking signal is not detected, determining a pre-filling braking strategy; after the preset time length is obtained after the pre-filling, if the pedal braking signal is not detected yet, a brake-on braking strategy is determined; and after the set time length after the inching brake is performed, if the pedal brake signal is not detected yet, determining an autonomous emergency brake strategy.
9. The system of claim 8, further comprising a first two-way check valve and a second two-way check valve; two air inlets of the first two-way one-way valve are respectively connected with a first air outlet of the quick release valve and a rear axle air storage tank of a factory-leaving commercial vehicle, an air outlet is connected with the rear axle brake air chamber, two air inlets of the second two-way one-way valve are respectively connected with a second air outlet of the quick release valve and a front axle air storage tank of the factory-leaving commercial vehicle, and an air outlet is connected with the front axle brake air chamber;
when the AEB controller is used for detecting a pedal brake signal, the AEB controller controls the quick release valve to release pressure, so that gas in the rear axle gas storage tank enters the rear axle brake chamber through the first two-way check valve, and/or gas in the front axle gas storage tank enters the front axle brake chamber through the second two-way check valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110910773.3A CN113353045B (en) | 2021-08-10 | 2021-08-10 | Commercial vehicle after-loading gas circuit braking auxiliary system and method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110910773.3A CN113353045B (en) | 2021-08-10 | 2021-08-10 | Commercial vehicle after-loading gas circuit braking auxiliary system and method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN113353045A CN113353045A (en) | 2021-09-07 |
| CN113353045B true CN113353045B (en) | 2021-10-29 |
Family
ID=77540832
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110910773.3A Active CN113353045B (en) | 2021-08-10 | 2021-08-10 | Commercial vehicle after-loading gas circuit braking auxiliary system and method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113353045B (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108501946A (en) * | 2017-02-24 | 2018-09-07 | 现代自动车株式会社 | Device and method for generating warning in the car |
| CN109080604A (en) * | 2018-08-14 | 2018-12-25 | 格陆博科技有限公司 | A kind of automatic emergency brake system based on AEB system |
| KR102011664B1 (en) * | 2018-06-07 | 2019-08-19 | 계명대학교 산학협력단 | Test evaluation apparatus for autonomous emergency braking system and control method thereof |
| CN210554754U (en) * | 2019-08-19 | 2020-05-19 | 厦门金龙旅行车有限公司 | Emergency braking system for vehicle and vehicle |
| CN112512875A (en) * | 2018-07-25 | 2021-03-16 | 邦迪克斯商用车系统有限责任公司 | Traction vehicle controller and trailer brake control method using trailer brake strategy |
| CN112660083A (en) * | 2021-01-15 | 2021-04-16 | 三一汽车制造有限公司 | Emergency braking device, vehicle and vehicle braking control method |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9090234B2 (en) * | 2012-11-19 | 2015-07-28 | Magna Electronics Inc. | Braking control system for vehicle |
-
2021
- 2021-08-10 CN CN202110910773.3A patent/CN113353045B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108501946A (en) * | 2017-02-24 | 2018-09-07 | 现代自动车株式会社 | Device and method for generating warning in the car |
| KR102011664B1 (en) * | 2018-06-07 | 2019-08-19 | 계명대학교 산학협력단 | Test evaluation apparatus for autonomous emergency braking system and control method thereof |
| CN112512875A (en) * | 2018-07-25 | 2021-03-16 | 邦迪克斯商用车系统有限责任公司 | Traction vehicle controller and trailer brake control method using trailer brake strategy |
| CN109080604A (en) * | 2018-08-14 | 2018-12-25 | 格陆博科技有限公司 | A kind of automatic emergency brake system based on AEB system |
| CN210554754U (en) * | 2019-08-19 | 2020-05-19 | 厦门金龙旅行车有限公司 | Emergency braking system for vehicle and vehicle |
| CN112660083A (en) * | 2021-01-15 | 2021-04-16 | 三一汽车制造有限公司 | Emergency braking device, vehicle and vehicle braking control method |
Also Published As
| Publication number | Publication date |
|---|---|
| CN113353045A (en) | 2021-09-07 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN108349471B (en) | Method for setting the brake pressure of a vehicle and brake system for carrying out the method | |
| CN108883755B (en) | Electronically controllable pneumatic brake system in a commercial vehicle and method for electronically controlling a pneumatic brake system | |
| US8512208B2 (en) | Braking system for a utility vehicle which can be coupled pneumatically to a trailer and method for operating such a braking system | |
| US9043105B2 (en) | Behavior control device for a combination vehicle | |
| US20080054716A1 (en) | Brake control apparatus | |
| JP4685658B2 (en) | Brake control device | |
| US7178883B2 (en) | Vehicular brake system | |
| US20070152500A1 (en) | Brake control apparatus and method for controlling the brake | |
| US20140180553A1 (en) | Method and EBS Control Unit for Controlling Brake-Application Energy of a Vehicle Combination | |
| US7244002B2 (en) | Vehicle brake system | |
| CN107921944B (en) | Method for regulating the brake pressure of a motor vehicle, brake system for carrying out the method and motor vehicle | |
| US8423253B2 (en) | Automatic braking apparatus for a vehicle | |
| JP2001260851A (en) | Brake control device for vehicle | |
| JP2018504315A (en) | Method for adjusting the brake pressure of a motor vehicle by actuation of a pressure control valve, brake device for carrying out this method and motor vehicle | |
| CN113353045B (en) | Commercial vehicle after-loading gas circuit braking auxiliary system and method | |
| CN115709705A (en) | Brake boosting method and device and vehicle | |
| CN211710804U (en) | Electronic control brake system of commercial vehicle | |
| CN110167802B (en) | Regenerative braking system for a vehicle and method for operating a regenerative braking system for a vehicle | |
| JP4224528B2 (en) | Brake control device for vehicle | |
| JP2838560B2 (en) | Accumulator | |
| US20180037201A1 (en) | Vehicle behavior control device | |
| US11440518B2 (en) | Vehicle braking system | |
| EP4306344A1 (en) | Vehicle control system and associated methods | |
| CN117734658A (en) | Single-pipeline failure diagnosis method, system and storage medium | |
| JP2023133219A (en) | Vehicle braking method, vehicle, data processing system and medium |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |