CN111216702A - Device for realizing parking function by utilizing hydraulic braking system - Google Patents
Device for realizing parking function by utilizing hydraulic braking system Download PDFInfo
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- CN111216702A CN111216702A CN202010206134.4A CN202010206134A CN111216702A CN 111216702 A CN111216702 A CN 111216702A CN 202010206134 A CN202010206134 A CN 202010206134A CN 111216702 A CN111216702 A CN 111216702A
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- pressure
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- parking
- valve
- hydraulic pressure
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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
- 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
- B60T13/12—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 the fluid being liquid
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- Engineering & Computer Science (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Braking Systems And Boosters (AREA)
- Valves And Accessory Devices For Braking Systems (AREA)
Abstract
The invention relates to a device for realizing a pressure-maintaining parking function by using a hydraulic braking system, which comprises the hydraulic braking system, a switching valve, a pressure-maintaining valve, a one-way valve, a pressure-maintaining parking control unit, a hydraulic pressure sensor and a wheel cylinder, retains the braking function of the original hydraulic braking system, and also has the pressure-maintaining parking function. Compared with the prior art, the pressure-maintaining parking brake system has the advantages that the pressure-maintaining parking function can be realized by additionally arranging the switching valve, the pressure-maintaining valve, the one-way valve and the hydraulic pressure sensor on the original hydraulic brake system, the additional parking brake system is omitted, the cost is reduced, the space is saved, and the installation is convenient.
Description
Technical Field
The invention relates to the technical field of automobile brake systems.
Background
The hydraulic brake system comprises a brake system with a vacuum booster and a main cylinder assembly and an electronic hydraulic brake system, wherein the brake system with the vacuum booster and the main cylinder assembly adopts the working principle that when a driver steps on a pedal, the force of a push rod is amplified under the action of vacuum boosting, and the push rod acts on the main cylinder to push a piston of the main cylinder to build pressure. When a driver steps on a pedal, the electronic hydraulic brake system acquires signals from a pedal opening sensor or a pedal displacement sensor, and calculates the assistance torque required to be output by a brake motor through an internal algorithm of an electronic control unit. The transmission mechanism converts the rotary motion output by the motor into linear motion and pushes the main cylinder piston to build pressure.
The existing hydraulic brake system can only realize the function of service braking, and when a vehicle stops and needs to be parked, an additional brake system is required to realize the parking function. The existing parking braking system has the disadvantages of high cost, more parts and large volume. To improve these problems, the present invention proposes an apparatus for implementing a parking function using a hydraulic brake system.
Disclosure of Invention
The invention aims to provide a device for realizing a parking function by using a hydraulic braking system, which reserves the braking function of an original hydraulic braking system and is added with the parking function. Compared with the prior art and the prior art, the device can replace the existing parking braking system, reduces the cost, saves the space, and is convenient to install, stable and reliable.
The purpose of the invention can be realized by the following technical scheme:
a device for realizing a parking function by using a hydraulic braking system comprises the hydraulic braking system, a switching valve, a pressure retaining valve, a one-way valve, a parking control unit and a hydraulic pressure sensor. The hydraulic braking system provides braking hydraulic pressure, the switching valve is arranged on an oil pipe between an oil outlet of the main cylinder and an oil outlet of the oil can, and after the pressure retaining valve is closed, the switching valve is opened to supplement the braking hydraulic pressure when the main cylinder returns. The pressure retaining valve closes the loop to enable the wheel cylinder connected with the oil pipe to maintain braking force when the braking pipeline has pressure, and the parking function is achieved. The one-way valve can realize the braking function through the one-way valve under the condition that the pressure retaining valve fails, the parking control unit is an electronic control unit which controls the electromagnetic valve to be opened or closed, and the hydraulic pressure sensor is used for collecting the hydraulic pressure of the wheel cylinder. And a switching valve, a pressure retaining valve and a one-way valve can be arranged on the two oil pipes simultaneously to control the pressure retaining valves and the switching valves on the two brake circuits, so that the four-wheel parking function is realized, and a better parking effect is achieved.
Compared with the prior art, the invention has the following advantages:
(1) the device with the parking function saves an additional parking power mechanism by means of the power mechanism of the hydraulic braking system, has a simple structure, low cost and high integration level, is convenient to adapt to various hydraulic braking system vehicle types, and has strong universality.
(2) The parking function device can be used as an independent small module, and has the advantages of small volume, light weight, flexible arrangement and convenient installation.
(3) The parking device can be integrated with a hydraulic braking system, so that the cost is reduced, the product integration level is improved, and the stability of electronic equipment of the braking system is improved.
Drawings
Fig. 1 is a schematic structural diagram of a first embodiment of the present invention.
Fig. 2 is a schematic structural diagram of a second embodiment of the present invention.
Detailed Description
The invention is described in detail below with reference to the figures and specific embodiments. The present embodiment is implemented on the premise of the technical solution of the present invention, and a detailed implementation manner and a specific operation process are given, but the scope of the present invention is not limited to the following embodiments.
1. First embodiment of an apparatus for performing a parking function using a hydraulic brake system
As shown in fig. 1, in the service braking process, a hydraulic braking system 1 provides braking hydraulic pressure, the hydraulic pressure flows out through oil outlets b and c of a master cylinder 1-2, at the moment, a switching valve 2 is in a closed state, a pressure retaining valve 3 is in an open state, the braking hydraulic pressure flows to wheel cylinders 7 and 9 through oil pipes, the braking hydraulic pressure flowing out from the oil outlet c of the master cylinder 1-2 directly flows to the wheel cylinders 8 and 10, a wheel cylinder piston is pushed, and a brake caliper is clamped, so that the service braking function is realized. When the vehicle is in a stop state and the parking function is started, the hydraulic braking system generates brake fluid pressure, the pressure retaining valve 3 is closed at the moment to enable the wheel cylinder to maintain the hydraulic pressure, then the hydraulic braking system releases the brake fluid pressure, the switching valve 2 is opened to enable the oil pots 1-3 to be communicated with the master cylinder to form a loop, and the oil pots 1-3 supplement the brake fluid for the master cylinder returning. Because the pressure-retaining valve 3 is in a closed state, hydraulic pressure in the wheel cylinders 7 and 9 can be continuously maintained, and the parking function is realized. The parking control unit 5 continuously works, hydraulic pressure of the wheel cylinders 7 and 9 is monitored in real time by reading signals of the hydraulic pressure sensor 6 in real time, when the hydraulic pressure is low, the hydraulic braking system 1 is actively requested to boost pressure, at the moment, the hydraulic braking system 1 can boost pressure to the wheel cylinders 7 and 9 through the check valve 4, and parking reliability and safety are guaranteed. When the vehicle is changed from the parking state to the driving state, the switching valve 2 is closed, the master cylinder 1-2 generates certain hydraulic pressure, then the pressure retaining valve 3 is opened, the pressure of the wheel cylinders 7, 9, 8 and 10 is completely controlled by the hydraulic pressure of the master cylinder 1-2, and after the master cylinder 1-2 returns, the hydraulic pressure of the wheel cylinders 7, 9, 8 and 10 is released, and the parking brake is released.
2. Second embodiment of the device for parking using a hydraulic braking system
As shown in fig. 2, during service braking, a hydraulic braking system 1 provides brake hydraulic pressure, which flows out through oil outlets b and c of a master cylinder 1-2, at this time, switching valves 2 and 3 are in a closed state, pressure- retaining valves 4 and 6 are in an open state, and the brake hydraulic pressure flows to wheel cylinders 10, 12, 11 and 13 through oil pipes to push piston of the wheel cylinders and clamp brake calipers, thereby realizing service braking. When the vehicle is in a stop state and the parking function is started, the hydraulic braking system generates brake fluid pressure, the pressure retaining valves 4 and 6 are closed at the moment to enable the wheel cylinders to maintain the hydraulic pressure, then the hydraulic braking system releases the brake fluid pressure, the switching valves 2 and 3 are opened to enable the oil pots 1-3 to be communicated with the master cylinder to form a loop, and the oil pots 1-3 supplement the brake fluid for the master cylinder return. Because the pressure-maintaining valves 4 and 6 are in a closed state, the hydraulic pressure in the wheel cylinders 10, 12, 11 and 13 can be continuously maintained, and the parking function is realized. The parking control unit 8 continuously works, hydraulic pressure of the wheel cylinders 10 and 12 is monitored in real time by reading signals of the hydraulic pressure sensor 9 in real time, when the hydraulic pressure is low, the hydraulic braking system 1 is actively requested to be pressurized, at the moment, the hydraulic braking system 1 can pressurize the wheel cylinders 10, 12, 11 and 13 through the check valves 5 and 7, and parking reliability and safety are guaranteed. When the vehicle is changed from the parking state to the driving state, the switching valves 2 and 3 are closed, the master cylinder 1-2 generates certain hydraulic pressure, then the pressure retaining valves 4 and 6 are opened, the pressure of the wheel cylinders 10, 12, 11 and 13 is completely controlled by the hydraulic pressure of the master cylinder 1-2, and after the master cylinder 1-2 returns, the hydraulic pressure of the wheel cylinders 10, 12, 11 and 13 is released, and the parking brake is released.
Claims (5)
1. An apparatus for performing a parking function using a hydraulic brake system, comprising:
the hydraulic brake system (1) provides brake hydraulic pressure, and the hydraulic brake system (1) consists of an actuating mechanism (1-1), a main cylinder (1-2) and an oil can (1-3);
the switching valve (2) is arranged on an oil pipe between an oil outlet (b) of the main cylinder (1-2) and an oil outlet (a) of the oil can (1-3);
the pressure retaining valve (3) is arranged on an oil pipe between an oil outlet (b) of the main cylinder (1-2) and the wheel cylinders (7) and (9);
the one-way valve (4) is connected with the pressure retaining valve (3) in parallel and arranged on an oil pipe between an oil outlet (b) of the main cylinder (1-2) and the wheel cylinders (7) and (9);
and the parking control unit (5) is connected with the switching valve (2), the pressure retaining valve (3) and the hydraulic pressure sensor (6) through a wire harness, collects hydraulic pressure signals and controls the opening and closing of the hydraulic pressure signals.
2. The apparatus for performing a parking function using a hydraulic brake system as set forth in claim 1, wherein: a switching valve can be arranged between the oil outlet (c) of the main cylinder (1-2) and the oil outlet (a) of the oil can (1-3), a pressure retaining valve is arranged between the oil outlet (c) of the main cylinder (1-2) and the wheel cylinders (8) (10), and a one-way valve is connected to the pressure retaining valve in parallel.
3. The apparatus for performing a parking function using a hydraulic brake system according to claim 1 or 2, wherein: a hydraulic pressure sensor (6) can be arranged on an oil pipe between the pressure-maintaining valve (3) and the wheel cylinders (7) and (9), and the hydraulic pressure sensor (6) is connected with the parking control unit (5) through a wiring harness.
4. The apparatus for performing a parking function using a hydraulic brake system according to claim 2, wherein: a hydraulic pressure sensor (6) can be arranged on an oil pipe between the pressure retaining valve (3) and the wheel cylinders (7) and (9), another hydraulic pressure sensor is arranged on an oil pipe between the pressure retaining valve between the oil outlet (c) of the main cylinder (1-2) and the wheel cylinders (8) and (10), and the two hydraulic pressure sensors are connected with the parking control unit (5) through a wiring harness.
5. Parking control unit (5) according to claim 1, characterized in that: the parking control unit (5) can be integrated with a hydraulic brake system control unit or can be made into an independent control module.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010206134.4A CN111216702A (en) | 2020-03-24 | 2020-03-24 | Device for realizing parking function by utilizing hydraulic braking system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010206134.4A CN111216702A (en) | 2020-03-24 | 2020-03-24 | Device for realizing parking function by utilizing hydraulic braking system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111216702A true CN111216702A (en) | 2020-06-02 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010206134.4A Pending CN111216702A (en) | 2020-03-24 | 2020-03-24 | Device for realizing parking function by utilizing hydraulic braking system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111216702A (en) |
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2020
- 2020-03-24 CN CN202010206134.4A patent/CN111216702A/en active Pending
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