CN111252058A - Service braking emergency rescue device of hydraulic braking vehicle model - Google Patents
Service braking emergency rescue device of hydraulic braking vehicle model Download PDFInfo
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- CN111252058A CN111252058A CN202010133948.XA CN202010133948A CN111252058A CN 111252058 A CN111252058 A CN 111252058A CN 202010133948 A CN202010133948 A CN 202010133948A CN 111252058 A CN111252058 A CN 111252058A
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- brake
- hydraulic
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- circuit
- braking
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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
-
- 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
- B60T15/041—Driver's valves controlling auxiliary pressure brakes, e.g. parking or emergency brakes
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- Engineering & Computer Science (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Transmission Of Braking Force In Braking Systems (AREA)
- Valves And Accessory Devices For Braking Systems (AREA)
Abstract
The invention relates to a service braking emergency rescue device of a hydraulic braking vehicle type, which comprises a brake pedal, a brake master cylinder, a hydraulic controller and a wheel brake, wherein the brake pedal is arranged on the brake master cylinder; characterized in that the brake master cylinder is connected with a hydraulic controller through a first brake circuit, a first hydraulic pressure sensor and a first execution valve; the brake master cylinder is connected with the hydraulic controller through a second brake circuit, a second hydraulic pressure sensor and a second execution valve; and a meter for displaying the pressure condition in the double-circuit and an operation panel for controlling the on-off of the first execution valve and the second execution valve are arranged in the cab. The invention can temporarily interrupt the failed loop by the execution valve to eliminate the idle stroke added by the brake pedal, and can more controllably build pressure on the rest brake loops to fully utilize the rest brake performance.
Description
Technical Field
The invention relates to an emergency rescue device, in particular to a service braking emergency rescue device applied to a hydraulic braking vehicle type, and belongs to the technical field of automobile braking systems.
Background
The double-circuit hydraulic braking system of the hydraulic braking vehicle type mainly controls the movement of a piston in a braking main cylinder through a braking pedal, presses braking fluid in the braking main cylinder into two braking circuits, and controls brakes of front and rear wheels through the braking fluid in the two braking circuits respectively.
In the driving process, when a pipeline of a certain brake loop is damaged and fails, brake fluid can continuously leak due to the damage of the pipeline, and accordingly the invalid idle stroke of the brake pedal is obviously increased, so that the pressure cannot be effectively built, a driver loses the normal feeling of the brake pedal, and the possibility of out-of-control braking is increased.
Disclosure of Invention
The invention aims to solve the problems and further provides a service braking emergency rescue device of a hydraulic brake vehicle type. The emergency rescue device for the service braking can solve a series of problems of oil leakage of a pipeline, incapability of normally building pressure, out-of-control braking and the like generated when a certain loop of a hydraulic braking vehicle type double-loop hydraulic braking system is damaged and fails.
In order to solve the problems, the technical scheme adopted by the invention is as follows:
a service braking emergency rescue device of a hydraulic braking vehicle type comprises a brake pedal, a brake master cylinder, a hydraulic controller and a wheel brake; the brake pedal is used for driving and controlling a brake master cylinder, the brake master cylinder is respectively connected with a hydraulic controller through a first brake circuit and a second brake circuit, and the hydraulic controller is connected with wheel brakes arranged on front and rear wheels through different pipelines; it is characterized in that the device is characterized in that,
the brake master cylinder is connected with the hydraulic controller through a first brake circuit, a first hydraulic pressure sensor and a first execution valve which are arranged on the first brake circuit; the brake master cylinder is connected with the hydraulic controller through a second brake circuit and a second hydraulic pressure sensor and a second execution valve which are installed on the second brake circuit;
the first execution valve and the second execution valve are identical in structure and are respectively provided with a liquid inlet end connected with the brake main cylinder and a liquid outlet end connected with the hydraulic controller;
the first hydraulic sensor and the second hydraulic sensor have the same structure and are both arranged at the liquid inlet ends of the first execution valve and the second execution valve;
an instrument for displaying the internal pressure conditions of the first brake circuit and the second brake circuit is arranged in the cab, and the instrument is in signal connection with the first hydraulic sensor and the second hydraulic sensor;
and an operating panel for controlling the on-off of the first brake circuit and the second brake circuit is arranged in the cab, and the operating panel is connected with the first execution valve and the second execution valve through an electromagnetic control circuit.
The executive valve comprises a valve body and a valve cavity, wherein a liquid inlet hole and a liquid outlet hole which are communicated with the valve cavity are formed in the liquid inlet end and the liquid outlet end of the valve body respectively, a permanent magnet iron core is elastically pressed in the valve cavity, an electromagnetic coil is installed at the liquid outlet end of the valve body and is connected with an electromagnetic control circuit, and the electromagnetic control circuit realizes attraction and separation of the permanent magnet iron core and the electromagnetic coil through switching of current directions, so that the on-off of the executive valve is realized.
The liquid outlet hole is in a conical shape with the diameter being reduced along the liquid outlet direction, and the head end of the permanent magnet iron core is in a spherical shape which is matched with the liquid outlet hole and can be effectively blocked.
The electromagnetic control circuit comprises a pair of normally open contacts and a pair of normally closed contacts which are connected with a power supply, and a double-pole switch is adopted to switch between the normally open contacts and the normally closed contacts, so that the switching of the current direction can be realized, and the attraction and the disconnection of the permanent magnet iron core and the electromagnetic coil are further controlled.
The instrument in the cab has the display and alarm functions, and the set conditions of the display and alarm functions are as follows: when the braking pressure value of one circuit is lower than 1MPa and the braking pressure difference value of the two circuits exceeds 1MPa, the instrument displays the circuit with leakage and starts a sound alarm, and at the moment, the control panel can be manually operated to close the execution valve on the circuit with leakage.
The invention relates to a service braking emergency rescue device of a hydraulic braking vehicle type, which monitors the braking pressure value of a double loop in real time through a hydraulic sensor arranged on the double loop and provides a display alarm function outwards through the design of an instrument. The structure of the execution valve adopts electromagnetic control, and realizes the switching of the current direction by combining a power supply and a double-pole switch, thereby changing the magnetic poles of the electromagnetic coil and the permanent magnet iron core and finally realizing the opening and closing of the electromagnetic valve port. Therefore, in the event of breakage failure of one circuit in the double-circuit system, the driver can respond for the first time and control the actuating valve on the brake circuit through the control panel to maintain the driver to return to the normal brake pedal feeling of the emergency rescue device.
Drawings
FIG. 1: structure schematic diagram of service braking emergency rescue device of hydraulic braking vehicle type
FIG. 2: an execution valve structural diagram;
FIG. 3: the internal structure of the execution valve is schematic (sealing state);
FIG. 4: the internal structure of the execution valve is schematic (normally-on state);
in the figure, 1, a brake pedal, 2, a brake master cylinder, 3, a hydraulic controller, 4, a wheel, 51, a first brake circuit, 52, a second brake circuit, 6, an execution valve, 6a, a liquid inlet end, 6b, a liquid outlet end, 6c, a valve body, 6d, a valve cavity, 6f, a liquid inlet hole, 6e, a liquid outlet hole, 61, a first execution valve, 62, a second execution valve, 7, a hydraulic sensor, 7a, a hydraulic signal output end, 71, a first hydraulic sensor, 72, a second hydraulic sensor, 8, a meter, 9, a control panel, 10, a permanent magnet core, 11, an electromagnetic coil, 12, a spring, 13 and a sealing surface.
Detailed Description
The present invention will be described in detail below with reference to the accompanying drawings.
Examples
A service braking emergency rescue device of a hydraulic braking vehicle type comprises a brake pedal 1, a brake master cylinder 2, a hydraulic controller 3 and wheels 4 provided with wheel brakes; the brake pedal 1 is used for driving and controlling a brake master cylinder 2, the brake master cylinder 2 is respectively connected with a hydraulic controller 3 through a first brake circuit 51 and a second brake circuit 52, and the hydraulic controller 3 is connected with wheel brakes arranged on front and rear wheels 4 through different pipelines. A first execution valve 61 and a first hydraulic sensor 71 are installed on the first brake circuit 51, a second execution valve 62 and a second hydraulic sensor 72 are installed on the second brake circuit 52, the first execution valve 61 and the second execution valve 62 are identical in structure and are provided with a liquid inlet end 6a connected with the brake master cylinder 2 and a liquid outlet end 6b connected with a hydraulic controller; the first hydraulic pressure sensor 71 and the second hydraulic pressure sensor 72 have the same structure and are both mounted at the liquid inlet ends 6a of the first actuator valve 61 and the second actuator valve 62. An instrument 8 and an operation panel 9 are arranged in the cab, and the instrument 8 is respectively connected with a first hydraulic pressure sensor 71 and a second hydraulic pressure sensor 72 in a signal mode and is respectively used for displaying the brake pressure values of the first brake circuit 51 and the second brake circuit 52.
The instrument in this embodiment has a display and alarm function, and the setting conditions of the display and alarm function are as follows: when the braking pressure value of one circuit is lower than 1MPa and the braking pressure difference value of the two circuits exceeds 1MPa, the instrument displays the circuit with leakage and starts a sound alarm, and at the moment, the control panel can be manually operated to close the execution valve on the circuit with leakage. The control panel 9 is used to control the on/off of the first brake circuit 51 and the second brake circuit 52, and is actually connected to the first actuating valve 61 and the second actuating valve 62 through a two-pole switch and an electromagnetic control circuit.
The executive valve structure of this embodiment includes valve body 6c and valve pocket 6d, the feed liquor end and the play liquid end of valve body 6c seted up respectively with feed liquor hole 6f and play liquid hole 6e that valve pocket 6d link up mutually, the inside permanent magnet iron core 10 that is equipped with of spring 12 pressure of passing through of valve pocket 6d, solenoid 11 is installed to the play liquid end 6b of valve body 6c, solenoid 11 links to each other with solenoid electric circuit, and solenoid electric circuit realizes the actuation and the break-make of going out the executive valve through the switching to the electric current direction to permanent magnet iron core 10 and solenoid 11, and then realizes the break-make of executive valve. The liquid outlet holes 6e are in a conical shape with the diameter being reduced from large to small along the liquid outlet direction, and the head ends of the permanent magnet iron cores 10 are in spherical shapes which are matched with the liquid outlet holes 6e and can effectively block the liquid outlet holes. The electromagnetic control circuit comprises a pair of normally open contacts and a pair of normally closed contacts which are connected with a power supply, and a double-pole switch is adopted to switch between the normally open contacts and the normally closed contacts, so that the switching of the current direction can be realized, and the attraction and the disconnection of the permanent magnet iron core and the electromagnetic coil are further controlled.
The connection structure of the execution valve 6 is as shown in fig. 2, the first end is a liquid inlet end 6a connected with the brake master cylinder 2, the second end is a liquid outlet end 6b connected with the hydraulic controller 3, a hydraulic sensor 7 is installed at the liquid inlet end 6a connected with the brake master cylinder 2, and the hydraulic sensor 7 is provided with a hydraulic signal output end 7a connected with an instrument signal. When the execution valve 6 is in a normally-open state in a normal state, and a brake leakage condition occurs in a brake circuit connected with the liquid outlet end 6b of the execution valve 6, circuit leakage alarm information is output according to the comparison condition of signals of the first hydraulic sensor 71 and the second hydraulic sensor 72 in the two circuits, the execution valve is manually controlled to be switched to a disconnected state, and a driver is assisted to perform emergency braking by using the brake performance of the residual circuit. When the fault maintenance is eliminated, the electromagnetic valve is manually switched to be reset to be in a normally open state.
The internal structure of the actuator valve 6 is shown in fig. 3, and the normal open state is the normal use state, and the sealing state is the blocking state after the circuit failure. The execution valve sealing surface 13 adopts the matching sealing of a conical surface and a spherical surface, and the surface roughness of the sealing surface 13 is less than 0.2 mu m. In a normal open state, the electromagnetic coil 11 is electrified normally and repels the polarity of the permanent magnet iron core 10, so that the execution valve 6 is kept in an open state; when the permanent magnet iron core is in a sealed state, the electromagnetic coil 11 switches the electrifying direction, the polarity is attracted at the moment, the sealing surface 13 is closed, and meanwhile high-pressure oil is input into the liquid inlet hole 6f to tightly press the permanent magnet iron core 10 from the back, so that the sealing is more reliable.
The invention discloses a service braking emergency rescue device, which comprises the following control processes:
in the normal running process, when the second brake circuit 52 has the leakage failure of the pipeline damage brake fluid, the brake pedal 1 is normally braked, two brake pressures with larger difference can be established in the double loops of the brake system (the hydraulic pressure value is obtained by a hydraulic sensor in an actuator), when one of the brake pressure values in the two loops is lower than 1MPa and the difference value of the two pressures exceeds 1MPa, the instrument 8 in the cab gives an alarm, and displays a circuit with a low hydraulic pressure, at which the operation panel 9 is manually operated, the second execution valve 62 in the second brake circuit 52 in which the brake leakage occurs is closed, at which time the brake hydraulic pressure in the second brake circuit 52 is temporarily lost, the vehicle is subjected to emergency service braking by means of only the brake hydraulic pressure in the first brake circuit 51, and the normal pedal feeling and the brake hydraulic pressure building of a driver are maintained, and the fault vehicle is transferred to a maintenance area with controllable brake performance. When a brake leakage failure occurs in first brake circuit 51, a corresponding brake operation is performed.
The invention has the following beneficial effects:
1. when a hydraulic brake vehicle type double-loop service brake system is started up under the condition that a pipeline is damaged and fails, the stroke of a brake pedal can be recovered to a normal state;
2. after the brake pedal returns to the normal pedal stroke position, the rest brake circuits can return to the normal brake pressure build-up state;
3. the brake fluid stops leaking oil due to the closing of the leakage end loop;
4. the driver can basically ensure normal brake controllability because of recovering normal brake pedal feel.
Claims (5)
1. A service braking emergency rescue device of a hydraulic braking vehicle type comprises a brake pedal, a brake master cylinder, a hydraulic controller and a wheel brake; the brake pedal is used for driving and controlling a brake master cylinder, the brake master cylinder is respectively connected with a hydraulic controller through a first brake circuit and a second brake circuit, and the hydraulic controller is connected with wheel brakes arranged on front and rear wheels through different pipelines; it is characterized in that the preparation method is characterized in that,
the brake master cylinder is connected with the hydraulic controller through a first brake circuit, a first hydraulic pressure sensor and a first execution valve which are arranged on the first brake circuit; the brake master cylinder is connected with the hydraulic controller through a second brake circuit and a second hydraulic pressure sensor and a second execution valve which are installed on the second brake circuit;
the first execution valve and the second execution valve are identical in structure and are respectively provided with a liquid inlet end connected with the brake main cylinder and a liquid outlet end connected with the hydraulic controller;
the first hydraulic sensor and the second hydraulic sensor have the same structure and are both arranged at the liquid inlet ends of the first execution valve and the second execution valve;
an instrument for displaying the internal pressure conditions of the first brake circuit and the second brake circuit is arranged in the cab, and the instrument is in signal connection with the first hydraulic sensor and the second hydraulic sensor;
an operating panel for controlling the on-off of the first execution valve and the second execution valve is arranged in the cab.
2. A service brake emergency rescue apparatus of a hydraulic brake vehicle type as claimed in claim 1,
the executive valve comprises a valve body and a valve cavity, wherein a liquid inlet hole and a liquid outlet hole which are communicated with the valve cavity are formed in the liquid inlet end and the liquid outlet end of the valve body respectively, a permanent magnet iron core is arranged in the valve cavity in an elastic pressing mode, an electromagnetic coil is arranged at the liquid outlet end of the valve body and is connected with an electromagnetic control circuit, and the electromagnetic control circuit realizes attraction and breaking of the permanent magnet iron core and the electromagnetic coil through switching of current directions, so that the on-off of the executive valve is realized.
3. A service brake emergency rescue apparatus of a hydraulic brake vehicle type as claimed in claim 2,
the liquid outlet hole is in a conical shape with the diameter being reduced along the liquid outlet direction, and the head end of the permanent magnet iron core is in a spherical shape which is matched with the liquid outlet hole and can be effectively blocked.
4. A service brake emergency rescue apparatus of a hydraulic brake vehicle type as claimed in claim 2,
the electromagnetic control circuit comprises a pair of normally open contacts and a pair of normally closed contacts which are connected with a power supply, and a double-pole switch is adopted to switch between the normally open contacts and the normally closed contacts, so that the switching of the current direction can be realized, and the attraction and the disconnection of the permanent magnet iron core and the electromagnetic coil are further controlled.
5. A service brake emergency rescue apparatus of a hydraulic brake vehicle type as claimed in claim 2,
the instrument has the display and alarm functions, and the set conditions of the display and alarm functions are as follows: when the braking pressure value of one circuit is lower than 1MPa and the difference value of the braking pressures of the two circuits exceeds 1MPa, the instrument displays the circuit with leakage and starts sound alarm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010133948.XA CN111252058A (en) | 2020-03-02 | 2020-03-02 | Service braking emergency rescue device of hydraulic braking vehicle model |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010133948.XA CN111252058A (en) | 2020-03-02 | 2020-03-02 | Service braking emergency rescue device of hydraulic braking vehicle model |
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| Publication Number | Publication Date |
|---|---|
| CN111252058A true CN111252058A (en) | 2020-06-09 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010133948.XA Pending CN111252058A (en) | 2020-03-02 | 2020-03-02 | Service braking emergency rescue device of hydraulic braking vehicle model |
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Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4523792A (en) * | 1982-12-22 | 1985-06-18 | Itt Industries, Inc. | Dual-circuit hydraulic brake system |
| US20040189083A1 (en) * | 2001-08-31 | 2004-09-30 | Stan Nowak | Hydraulic brake circuit |
| CN103754210A (en) * | 2014-01-08 | 2014-04-30 | 同济大学 | Motor-driven electronic hydraulic braking system |
| CN204775204U (en) * | 2015-03-27 | 2015-11-18 | 同济大学 | Parallel bar formula full decoupling electron hydraulic braking system |
| CN106515684A (en) * | 2015-09-11 | 2017-03-22 | 株式会社万都 | Electric brake system |
| CN107021085A (en) * | 2016-02-02 | 2017-08-08 | 株式会社万都 | Electric brake system and its control method |
| CN109760656A (en) * | 2018-12-28 | 2019-05-17 | 上海擎度汽车科技有限公司 | Hydraulic decoupling type electronic hydraulic brake system |
| CN211685053U (en) * | 2020-03-02 | 2020-10-16 | 山东汽车制造有限公司 | Service braking emergency rescue device of hydraulic braking vehicle model |
-
2020
- 2020-03-02 CN CN202010133948.XA patent/CN111252058A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4523792A (en) * | 1982-12-22 | 1985-06-18 | Itt Industries, Inc. | Dual-circuit hydraulic brake system |
| US20040189083A1 (en) * | 2001-08-31 | 2004-09-30 | Stan Nowak | Hydraulic brake circuit |
| CN103754210A (en) * | 2014-01-08 | 2014-04-30 | 同济大学 | Motor-driven electronic hydraulic braking system |
| CN204775204U (en) * | 2015-03-27 | 2015-11-18 | 同济大学 | Parallel bar formula full decoupling electron hydraulic braking system |
| CN106515684A (en) * | 2015-09-11 | 2017-03-22 | 株式会社万都 | Electric brake system |
| CN107021085A (en) * | 2016-02-02 | 2017-08-08 | 株式会社万都 | Electric brake system and its control method |
| CN109760656A (en) * | 2018-12-28 | 2019-05-17 | 上海擎度汽车科技有限公司 | Hydraulic decoupling type electronic hydraulic brake system |
| CN211685053U (en) * | 2020-03-02 | 2020-10-16 | 山东汽车制造有限公司 | Service braking emergency rescue device of hydraulic braking vehicle model |
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