CN211642487U - Single-channel hydraulic braking anti-lock system - Google Patents
Single-channel hydraulic braking anti-lock system Download PDFInfo
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- CN211642487U CN211642487U CN202020087511.2U CN202020087511U CN211642487U CN 211642487 U CN211642487 U CN 211642487U CN 202020087511 U CN202020087511 U CN 202020087511U CN 211642487 U CN211642487 U CN 211642487U
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Abstract
The utility model discloses a single-channel hydraulic braking anti-lock system, which comprises a normally open solenoid valve, a brake master cylinder and a vehicle front wheel brake cylinder, wherein the normally open solenoid valve is communicated with the brake master cylinder and the vehicle front wheel brake cylinder; the liquid inlet of the first normally closed electromagnetic valve is communicated with the liquid outlet of the normally open electromagnetic valve, and the liquid outlet of the first normally closed electromagnetic valve is communicated with the energy accumulator; the liquid inlet end of the one-way valve is communicated with the energy accumulator, and the liquid outlet end of the one-way valve is communicated with the brake master cylinder; the pressure sensor is connected with an oil outlet of the brake master cylinder; a wheel speed sensor connected to a front wheel of the vehicle; and the control module is respectively connected with the normally open electromagnetic valve, the first normally closed electromagnetic valve, the pressure sensor and the wheel speed sensor. This single channel hydraulic braking anti-lock system reduces manufacturing cost under the prerequisite that satisfies braking anti-lock system basic performance, and the security is high, can protect the driving for riding.
Description
Technical Field
The utility model relates to a two wheeler, tricycle braking system technical field specifically say a single channel hydraulic braking anti-lock braking system.
Background
The appearance of vehicles such as automobiles, motorcycles and the like changes the traveling mode of people and shortens the distance between people. The driving safety problem is more and more emphasized by people while bringing convenience to people. Vehicles equipped with an anti-lock braking system (ABS) have been increasingly favored because of their high driving safety.
The ABS structurally comprises an HCU and an ECU, wherein the HCU is an ABS executing mechanism and comprises an electromagnetic valve and a motor, the electromagnetic valve comprises a pressure increasing valve and a pressure reducing valve, and the ECU is an electric control unit and mainly comprises a PCBA, software and a coil. All the structures of the ABS are mutually matched to work, so that the vehicle is prevented from being locked, inclined and fallen. The existing vehicle adopts a double-channel braking system and a four-channel braking system, the manufacturing cost is relatively high, the psychological expectation of consumers is exceeded, the popularization of the existing vehicle on low-end motorcycles, electric two-wheel vehicles and higher bicycles is severely limited, the occupancy rate of the part of vehicles on the market reaches more than 95%, and therefore the double-channel braking system or the four-channel braking system in the prior art cannot well adapt to the market requirement and cannot provide higher safety guarantee for the trip of the consumers.
SUMMERY OF THE UTILITY MODEL
The to-be-solved technical problem of the utility model is, overcome the defect of above prior art, provide one kind and satisfying under the prerequisite of braking anti-lock braking system basic performance, reduce manufacturing cost, the security is high, can be for the hydraulic braking anti-lock braking system of the single channel of the insurance of riding safety and security navigation.
The technical solution of the utility model is that, a hydraulic braking anti-lock system of single channel with following structure is provided: a single-channel hydraulic anti-lock brake system for mounting on a front wheel brake system of a vehicle, comprising
A liquid inlet of the normally open electromagnetic valve is communicated with an oil outlet of the brake master cylinder, and a liquid outlet of the normally open electromagnetic valve is communicated with a brake wheel cylinder of a front wheel of the vehicle;
the liquid inlet of the first normally closed electromagnetic valve is communicated with the liquid outlet of the normally open electromagnetic valve, and the liquid outlet of the first normally closed electromagnetic valve is communicated with the energy accumulator;
the liquid inlet end of the one-way valve is communicated with the energy accumulator, and the liquid outlet end of the one-way valve is communicated with the brake master cylinder and is used for enabling the brake fluid in the energy accumulator to flow into the brake master cylinder when the pressure in the brake master cylinder is reduced;
the pressure sensor is connected with an oil outlet of the brake master cylinder and is used for measuring the pressure of brake fluid in the brake master cylinder;
the wheel speed sensor is connected to the front wheel of the vehicle and used for acquiring the rotating speed of the front wheel of the vehicle;
the control module is respectively connected with the normally open electromagnetic valve, the first normally closed electromagnetic valve, the pressure sensor and the wheel speed sensor and used for controlling the normally open electromagnetic valve and the first normally closed electromagnetic valve to act, receiving a pressure signal of brake fluid in the brake master cylinder measured by the pressure sensor and receiving a rotating speed signal of a front wheel of the vehicle collected by the wheel speed sensor.
As an improvement, the hand feeling simulation device further comprises a hand feeling simulation unit, the hand feeling simulation unit comprises a valve body, a closed inner cavity is arranged in the valve body, a piston is matched in the inner cavity in a sliding mode, the outer side wall of the piston is connected with the inner wall of the inner cavity in a sealing mode, and the piston divides the space of the inner cavity into two independent cavities: the brake master cylinder comprises a first cavity and a second cavity, wherein an oil inlet of the first cavity is communicated with the brake master cylinder, an elastic piece is arranged in the second cavity, one end of the elastic piece abuts against the end face, close to the second cavity, of the piston, and the other end of the elastic piece abuts against the inner bottom wall of the second cavity.
Preferably, the outer circumferential wall of the piston is provided with at least one annular groove, an annular sealing ring made of elastic material is connected in the annular groove, and the outer edge of the annular sealing ring is sealed with the inner wall of the inner cavity.
Preferably, a second normally closed solenoid valve is connected between the oil inlet of the first cavity of the hand feeling simulation unit and the brake master cylinder, and the second normally closed solenoid valve is electrically connected with the control module.
After the structure above adopting, the utility model discloses the hydraulic braking anti-lock system of single channel compares with prior art, has following advantage: compared with a double-channel hydraulic braking anti-lock system and a four-channel hydraulic braking anti-lock system, the single-channel hydraulic braking anti-lock system is simple in structure, low in manufacturing cost, convenient to popularize in a large scale, capable of protecting riding and high in safety; moreover, the single-channel hydraulic braking anti-lock system removes a motor as a power source of the hydraulic braking anti-lock system, so that the noise is low, and the user experience is good; in addition, the hand feeling simulation unit additionally arranged in the single-channel hydraulic braking anti-lock system can greatly weaken the problem of dragging of the return of the braking hand brake after braking is finished, and meanwhile, the braking master cylinder can have enough brake fluid to perform secondary braking. This hydraulic braking anti-lock system of single channel adopts pressure sensor to measure the pressure in the brake master cylinder, and confirm the pressure of brake wheel cylinder by control module according to whole car pressure estimation, through the pressure differential around the normally open solenoid valve, also be the pressure differential of the pressure of brake master cylinder oil-out and brake wheel cylinder internal pressure, adjust the electric current of controlling normally open solenoid valve and first normally closed solenoid valve, thereby control the flow of normally open solenoid valve and first normally closed solenoid valve, make the pressure of brake wheel cylinder can realize linear control, reduce noise and vibration, make the braking more steady reliable, can prolong product life simultaneously.
Drawings
Fig. 1 is a schematic diagram of a connection structure of a single-channel hydraulic anti-lock braking system according to the present invention.
Fig. 2 is a schematic structural diagram of a hand feeling simulation unit of the single-channel hydraulic braking anti-lock system of the present invention.
As shown in the figure:
1. the brake system comprises a brake master cylinder, 2, a brake wheel cylinder, 3, a normally open electromagnetic valve, 4, a first normally closed electromagnetic valve, 5, an energy accumulator, 6, a one-way valve, 7, a pressure sensor, 8, a hand feeling simulation unit, 800, an inner cavity, 801, a piston, 802, a first cavity, 803, a second cavity, 804, an elastic piece, 805, an annular groove, 806, an annular sealing ring, 807, an oil inlet, 808, a valve body, 9, a second normally closed electromagnetic valve, 10, a control module, 11 and a wheel speed sensor.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.
Referring to fig. 1 and 2, the utility model discloses a single-channel hydraulic braking anti-lock system, which is used for being installed on a vehicle front wheel braking system and comprises a normally open solenoid valve 3, wherein a liquid inlet of the normally open solenoid valve is communicated with an oil outlet of a brake master cylinder 1, and a liquid outlet of the normally open solenoid valve is communicated with a vehicle front wheel brake cylinder 2; a first normally closed electromagnetic valve 4, the liquid inlet of which is communicated with the liquid outlet of the normally open electromagnetic valve 3, and the liquid outlet of which is communicated with an energy accumulator 5; the liquid inlet end of the one-way valve 6 is communicated with the energy accumulator 5, and the liquid outlet end of the one-way valve is communicated with the brake master cylinder 1, so that when the pressure in the brake master cylinder 1 is reduced, the brake liquid in the energy accumulator 5 flows into the brake master cylinder 1; the pressure sensor 7 is connected with an oil outlet of the brake master cylinder 1 and is used for measuring the pressure of brake fluid in the brake master cylinder 1; the wheel speed sensor 11 is connected to a front wheel of the vehicle and is used for acquiring the rotating speed of the front wheel of the vehicle; and the control module 10 is respectively connected with the normally open electromagnetic valve 3, the first normally closed electromagnetic valve 4, the pressure sensor 7 and the wheel speed sensor 11, and is used for controlling the actions of the normally open electromagnetic valve 3 and the first normally closed electromagnetic valve 4, receiving a pressure signal of brake fluid in the brake master cylinder 1 measured by the pressure sensor 7 and receiving a rotating speed signal of a front wheel of the vehicle collected by the wheel speed sensor 11.
When the vehicle needs to be braked in an emergency, a driver can enable the brake master cylinder 1 to establish brake pressure by poking the brake handle, and brake fluid from the liquid outlet of the brake master cylinder 1 reaches the brake wheel cylinders 2 of the front wheels of the vehicle through the normally open electromagnetic valve 3 to brake the vehicle; the control module 10 calculates the slip rate by collecting the wheel speed signal detected by the wheel speed sensor 11 and estimating the speed of the vehicle in the actual traveling direction through the controller, and when the control module 10 detects that the slip rate reaches 10% -30%, the single-channel hydraulic anti-lock brake system starts to intervene. At the moment, the normally open electromagnetic valve 3 and the first normally closed electromagnetic valve 4 are both in a power-off state, the brake master cylinder 1 continuously transmits brake fluid to the brake wheel cylinder 2, so that the braking force of the brake wheel cylinder 2 is continuously increased, the slip rate is gradually increased in the continuous braking process, the normally open electromagnetic valve 3 is powered on and closed at the moment, the first normally closed electromagnetic valve 4 is powered off, the vehicle is decelerated to the maximum for braking, when the slip rate exceeds the upper limit of 30%, the normally open electromagnetic valve 3 is continuously powered on and closed, the first normally closed electromagnetic valve 4 is powered on and opened, the brake fluid in the brake wheel cylinder 2 flows to the energy accumulator 5 through the first normally closed electromagnetic valve 4 and is stored, the pressure in the brake wheel cylinder 2 is reduced at the moment, the vehicle wheel speed is gradually matched with the vehicle speed, when the control module detects that the slip rate is lower than the lower limit target threshold value of 10%, the first normally closed electromagnetic, and the brake fluid from the fluid outlet of the brake master cylinder 1 reaches the brake wheel cylinders 2 of the front wheels of the vehicle through the normally open electromagnetic valve 3 again, and the vehicle is braked again, so that the cycle is performed until the vehicle braking is finished. After the vehicle braking is finished, the pressure of the master cylinder 1 is reduced to a certain degree, and the brake fluid in the accumulator 5 flows to the master cylinder 1 through the check valve 6, so that the pressure of the master cylinder 1 is maintained in an initial state for the next braking. Therefore, compared with a double-channel hydraulic braking anti-lock system and a four-channel hydraulic braking anti-lock system, the single-channel hydraulic braking anti-lock system is simple in structure and low in manufacturing cost.
The control module 10 of the present invention is an ECU, a single chip microcomputer or a traveling computer, etc., which is a product of the prior art, and the present invention is not described in detail; the wheel speed sensor and the pressure sensor are also products of relatively mature technologies in the prior art, such as a wheel speed sensor of the type IP-3100 manufactured by Shanghai Small wild tester measurement technologies, Inc., and an AST4100 pressure sensor sold by Beijing Rui hong Guangtong science and technology development, Inc.
Referring to fig. 2, an embodiment of the present invention further includes a hand feeling simulation unit 8, the hand feeling simulation unit 8 includes a valve body 808, the valve body 808 has a closed inner cavity 800 therein, the inner cavity 800 has a piston 801 in sliding fit, the outer side wall of the piston 801 is connected with the inner wall of the inner cavity 800 in a sealing manner, the piston 801 divides the space of the inner cavity 800 into two independent cavities: the brake master cylinder comprises a first cavity 802 and a second cavity 803, an oil inlet 807 of the first cavity 802 is communicated with the brake master cylinder 1, an elastic piece 804 is arranged in the second cavity 803, one end of the elastic piece 804 abuts against the end face, close to the second cavity 803, of the piston, and the other end of the elastic piece 804 abuts against the inner bottom wall of the second cavity 803. At least one annular groove 805 is formed in the outer circumferential wall of the piston 801, an annular sealing ring 806 made of elastic material is connected in the annular groove 805, and the outer edge of the annular sealing ring 806 is sealed with the inner wall of the inner part 800. A second normally closed solenoid valve 9 is connected between the oil inlet 807 of the first cavity 802 of the hand feeling simulation unit 8 and the brake master cylinder 1, and the second normally closed solenoid valve 9 is electrically connected with the control module 10. When the hand feeling simulation unit 8 brakes the vehicle, the control module controls the second normally closed electromagnetic valve 9 to be powered on and opened, so that the brake fluid at the fluid outlet of the plunger pump of the brake master cylinder 1 flows to the first cavity 802 of the hand feeling simulation unit 8, and in the process, the piston 801 is enabled to do reciprocating free linear motion in the inner cavity 800 under the action of the elastic element 804, so that the brake fluid pressure fluctuation at the fluid outlet of the plunger pump of the brake master cylinder 1 is reduced, and the comfort of a driver for operating the brake handle is high. Or in the process of braking the vehicle, when the pressure of the brake master cylinder 1 acquired by the pressure sensor 7 reaches a set threshold value, namely 40-50 BAR, the second normally closed solenoid valve 9 of the hand feeling simulation unit 8 is powered on and opened, so that the brake fluid of the brake master cylinder 1 flows into the inner cavity 800 of the hand feeling simulation unit 8, and the hand feeling of a driver for operating the brake handle is not too hard. According to the single-channel hydraulic anti-lock brake system, the brake fluid is completely stored in the energy accumulator 5 after the first normally closed electromagnetic valve 4 is electrified and opened, and after braking is finished, the brake fluid in the energy accumulator 5 cannot flow back to the brake master cylinder 1 in time, so that the brake handle has certain dragging feeling, and in addition, the problem of brake handle dragging caused by untimely brake fluid backflow of the brake master cylinder 1 can be effectively solved by introducing the hand feeling simulation unit 8 and matching the piston 801 of the hand feeling simulation unit with the piston diameter of the plunger pump of the brake master cylinder 1 after braking is finished. In addition, the defect that secondary braking cannot be performed or secondary braking pressure is insufficient due to the fact that the brake master cylinder 1 is selected to be small can be overcome by introducing the hand feeling simulation unit 8, the cylinder diameter specification of the brake master cylinder 1 can be selected to be large by introducing the hand feeling simulation unit, and the brake master cylinder with the large cylinder diameter is directly selected, so that the brake force required during manual braking is very large, the brake hand feeling is not good visually, the hand feeling simulation unit is used for just filling the defect that the brake hand feeling is insufficient due to the fact that the required brake force is large, and the comfort of a driver for operating the brake handle is high; that is, under the action of the hand feeling simulation unit 8, a brake master cylinder with a larger cylinder diameter can be configured to improve the braking force of the brake wheel cylinder, and the comfort is high when the driver operates the brake handle. Meanwhile, a pressure sensor 7 is introduced into the brake master cylinder 1 and can measure the pressure of the brake master cylinder 1, then the pressure of the brake wheel cylinder 2 is determined through the estimation of the pressure of the whole vehicle, and the control current of the normally open electromagnetic valve is adjusted through the pressure difference between the front and the back of the normally open electromagnetic valve, so that the pressure of the brake wheel cylinder 2 can be linearly controlled, and the noise and the vibration are reduced. The brake is more stable and reliable, and the service life of the product can be prolonged.
The above description is only for the specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention should be covered by the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (4)
1. A single channel hydraulic braking anti-lock system is used for being installed on a vehicle front wheel braking system and is characterized in that: it comprises
A liquid inlet of the normally open electromagnetic valve is communicated with an oil outlet of the brake master cylinder, and a liquid outlet of the normally open electromagnetic valve is communicated with a brake wheel cylinder of a front wheel of the vehicle;
the liquid inlet of the first normally closed electromagnetic valve is communicated with the liquid outlet of the normally open electromagnetic valve, and the liquid outlet of the first normally closed electromagnetic valve is communicated with the energy accumulator;
the liquid inlet end of the one-way valve is communicated with the energy accumulator, and the liquid outlet end of the one-way valve is communicated with the brake master cylinder and is used for enabling the brake fluid in the energy accumulator to flow into the brake master cylinder when the pressure in the brake master cylinder is reduced;
the pressure sensor is connected with an oil outlet of the brake master cylinder and is used for measuring the pressure of brake fluid in the brake master cylinder;
the wheel speed sensor is connected to the front wheel of the vehicle and used for acquiring the rotating speed of the front wheel of the vehicle;
the control module is respectively connected with the normally open electromagnetic valve, the first normally closed electromagnetic valve, the pressure sensor and the wheel speed sensor and used for controlling the normally open electromagnetic valve and the first normally closed electromagnetic valve to act, receiving a pressure signal of brake fluid in the brake master cylinder measured by the pressure sensor and receiving a rotating speed signal of a front wheel of the vehicle collected by the wheel speed sensor.
2. The single channel hydraulic brake antilock system of claim 1, wherein: it still includes the analog unit of feeling, the analog unit of feeling include the valve body, the valve body in have a confined inner chamber, the inner chamber in sliding fit piston, and the lateral wall of piston and the inner wall sealing connection of inner chamber, the piston divide into two independent cavitys with the space of inner chamber: the brake master cylinder comprises a first cavity and a second cavity, wherein an oil inlet of the first cavity is communicated with the brake master cylinder, an elastic piece is arranged in the second cavity, one end of the elastic piece abuts against the end face, close to the second cavity, of the piston, and the other end of the elastic piece abuts against the inner bottom wall of the second cavity.
3. The single channel hydraulic brake antilock system of claim 2, wherein: the piston is characterized in that at least one annular groove is formed in the outer circumferential wall of the piston, an annular sealing ring made of elastic materials is connected in the annular groove, and the outer edge of the annular sealing ring is sealed with the inner wall of the inner cavity.
4. The single channel hydraulic brake antilock system of claim 2, wherein: and a second normally closed solenoid valve is connected between the oil inlet of the first cavity of the hand feeling simulation unit and the brake master cylinder, and the second normally closed solenoid valve is electrically connected with the control module.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020087511.2U CN211642487U (en) | 2020-01-15 | 2020-01-15 | Single-channel hydraulic braking anti-lock system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020087511.2U CN211642487U (en) | 2020-01-15 | 2020-01-15 | Single-channel hydraulic braking anti-lock system |
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| Publication Number | Publication Date |
|---|---|
| CN211642487U true CN211642487U (en) | 2020-10-09 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020087511.2U Active CN211642487U (en) | 2020-01-15 | 2020-01-15 | Single-channel hydraulic braking anti-lock system |
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|---|---|
| CN (1) | CN211642487U (en) |
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2020
- 2020-01-15 CN CN202020087511.2U patent/CN211642487U/en active Active
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