CN113306539A - Electronic brake boosting system and method - Google Patents
Electronic brake boosting system and method Download PDFInfo
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- CN113306539A CN113306539A CN202110746879.4A CN202110746879A CN113306539A CN 113306539 A CN113306539 A CN 113306539A CN 202110746879 A CN202110746879 A CN 202110746879A CN 113306539 A CN113306539 A CN 113306539A
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- 238000000034 method Methods 0.000 title claims abstract description 8
- 239000007788 liquid Substances 0.000 claims abstract description 20
- 238000006073 displacement reaction Methods 0.000 claims abstract description 19
- 230000002159 abnormal effect Effects 0.000 claims description 3
- 238000006243 chemical reaction Methods 0.000 abstract 1
- 239000012530 fluid Substances 0.000 description 13
- OVSKGTONMLKNPZ-UHFFFAOYSA-N 3-(1-methylindol-3-yl)-4-(1-methyl-6-nitroindol-3-yl)pyrrole-2,5-dione Chemical compound C12=CC=CC=C2N(C)C=C1C1=C(C=2C3=CC=C(C=C3N(C)C=2)[N+]([O-])=O)C(=O)NC1=O OVSKGTONMLKNPZ-UHFFFAOYSA-N 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005065 mining Methods 0.000 description 1
- 230000036632 reaction speed Effects 0.000 description 1
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Classifications
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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
- B60T13/74—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 electrical assistance or drive
- B60T13/745—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 electrical assistance or drive acting on a hydraulic system, e.g. a master cylinder
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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
- B60T13/66—Electrical control in fluid-pressure brake systems
- B60T13/68—Electrical control in fluid-pressure brake systems by electrically-controlled valves
- B60T13/686—Electrical control in fluid-pressure brake systems by electrically-controlled valves in hydraulic systems or parts thereof
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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
- B60T8/00—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force
- B60T8/32—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force responsive to a speed condition, e.g. acceleration or deceleration
- B60T8/34—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force responsive to a speed condition, e.g. acceleration or deceleration having a fluid pressure regulator responsive to a speed condition
- B60T8/40—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force responsive to a speed condition, e.g. acceleration or deceleration having a fluid pressure regulator responsive to a speed condition comprising an additional fluid circuit including fluid pressurising means for modifying the pressure of the braking fluid, e.g. including wheel driven pumps for detecting a speed condition, or pumps which are controlled by means independent of the braking system
- B60T8/4072—Systems in which a driver input signal is used as a control signal for the additional fluid circuit which is normally used for braking
- B60T8/4081—Systems with stroke simulating devices for driver input
- B60T8/409—Systems with stroke simulating devices for driver input characterised by details of the stroke simulating device
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- Engineering & Computer Science (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Braking Systems And Boosters (AREA)
- Regulating Braking Force (AREA)
Abstract
The invention relates to an electronic brake boosting system and method, and belongs to the field of automobile braking. The hydraulic pressure booster comprises a double-cavity master cylinder, a master cylinder hydraulic sensor, a two-position three-way electromagnetic valve I, a pedal simulator, a displacement sensor, a two-position three-way electromagnetic valve II, a pressure boosting cylinder hydraulic sensor, a main pressure boosting mechanism, a liquid storage tank and a brake pedal. The advantage is novel structure, use the motor to brake the helping hand as the original vacuum source of power supply replacement of helping hand, hydraulic decoupling is accomplished to the cooperation solenoid valve, use two three solenoid valves to carry out hydraulic decoupling, compare 5 solenoid valves commonly used at present, have the cost advantage, and control comparatively simply, the reaction rate is fast, the robustness is strong, through controlling two three solenoid valves and main booster mechanism, reach the switching that control system formed braking and pressure boost logic.
Description
Technical Field
The invention belongs to the field of automobile braking, and particularly relates to an electronic braking assistance system and method.
Background
At present, a booster of a braking system in the automobile industry is mainly a vacuum booster, and the vacuum booster is used as a power source for boosting to push a brake master cylinder to form brake pressure. Vacuum boosters are applied to passenger vehicles in large quantities, but the vacuum boosters cannot be actively braked due to the fact that the vacuum boosters do not have line control performance, and vacuum is greatly influenced by atmospheric pressure climate, so that the vacuum boosters cannot meet the development of new energy vehicles and automatic driving in the future. Accordingly, brake-by-wire products such as electronic brake boosters have been developed.
Electronic brake booster in the trade at present mainly uses the motor as the power supply, and the decoupling type divide into: full decoupling, semi decoupling and non-decoupling. The semi-decoupling mode uses the idle stroke (usually 10-15 mm) of mechanical connection for decoupling. The full decoupling mode mainly uses an electromagnetic valve to decouple a hydraulic pipeline, and the existing full decoupling mode is mainly an integrated brake system one-box of companies such as Boshi, mainland, and mining Eiff, and the name is as follows: IPB, MKC-1, IBC and the like, 14 electromagnetic valves are used for completing hydraulic full decoupling, wherein 5 electromagnetic valves are used for a booster part, and the rest are used for ABS/ESC and the like, so that the problems of complex control, high cost and the like exist.
Disclosure of Invention
The invention provides an electronic brake boosting system and method, which aim to solve the problems of complex control and high cost in the prior art.
The technical scheme adopted by the invention is as follows: an electronic brake power-assisted system comprises a double-cavity master cylinder, a master cylinder hydraulic sensor, a two-position three-way solenoid valve I, a pedal simulator, a displacement sensor, a two-position three-way solenoid valve II, a booster cylinder hydraulic sensor, a main booster mechanism, a liquid storage tank and a brake pedal, wherein a runner port 1 of the liquid storage tank is connected with a runner port 2 of the main booster mechanism through a pipeline, the runner port 1 of the main booster mechanism is connected with the runner port 1 of the two-position three-way solenoid valve II through a runner, and the runner port 2 of the two-position three-way solenoid valve II is used for being connected with ESC/ABS; a runner port 2 of the liquid storage tank is connected with a runner port 3 of the double-cavity master cylinder through a runner, a runner port 1 of the double-cavity master cylinder is connected with a runner port 3 of the two-position three-way electromagnetic valve II through a pipeline, and the runner port 2 of the two-position three-way electromagnetic valve II is used for being connected with ESC/ABS; a runner port 3 of the liquid storage tank is connected with a runner port 4 of the double-cavity master cylinder through a runner, a runner port 2 of the double-cavity master cylinder is connected with a runner port 2 of the two-position three-way electromagnetic valve I through a pipeline, a runner port 1 of the two-position three-way electromagnetic valve I is connected with a runner port 1 of the pedal simulator through a runner, and a runner port 3 of the two-position three-way electromagnetic valve I is used for being connected with ESC/ABS; the runner port 2 of the pedal simulator is connected with the runner port 2 of the liquid storage tank through a runner, and the displacement sensor is fixed on the double-cavity main cylinder.
A flow passage between a flow passage port 2 of the double-cavity master cylinder and a flow passage port 2 of the two-position three-way electromagnetic valve I is connected with a master cylinder hydraulic sensor.
The main supercharging mechanism is connected with a supercharging cylinder hydraulic sensor.
A flow passage port 1 and a flow passage port 2 in a two-position three-way electromagnetic valve are large-flow normally closed flow passages, and the flow passage port 2 and the flow passage port 3 are small-flow normally open flow passages.
The two-position three-way electromagnetic valve of the invention has the flow passage port 1 and the flow passage port 2 as the large-flow normally closed flow passages, and the flow passage port 2 and the flow passage port 3 as the small-flow normally open flow passages.
An electronic brake boosting method comprising:
(1) in the normal state of the system, when a driver steps on a brake pedal, a displacement sensor sends out a displacement signal, the two-position three-way electromagnetic valve I and the two-position three-way electromagnetic valve II are electrified, a flow passage between the flow passage opening 1 and the flow passage opening 2 is opened, the flow passage between the flow passage opening 2 and the flow passage opening 3 is closed, and simultaneously, a main booster mechanism starts to act to build pressure, according to the p-v characteristic curve existing in the control system, the corresponding unintended pressure value is calculated through the displacement, the pressure value is compared with the measured value of the hydraulic sensor of the booster cylinder to form closed-loop regulation, generally PID regulation is adopted to meet the stability of the booster system, the double-cavity master cylinder is connected with the brake pedal, the brake input force of a driver is led into the pedal simulator to ensure the stability of the brake foot feeling, after braking is finished, signals of the main cylinder hydraulic sensor and the displacement sensor return to zero, and the two electromagnetic valves are powered off and return to the original state;
(2) when the motor, the electric appliance and the electric control system are in abnormal states, the two-position three-way electromagnetic valve I and the two-position three-way electromagnetic valve II are kept in a power-off state, a flow passage between the flow passage port 1 and the flow passage port 2 is normally closed, a flow passage between the flow passage port 2 and the flow passage port 3 is normally open, and at the moment, the input force of a driver is directly transmitted to a brake pipeline through the double-cavity master cylinder, so that redundant braking is brought;
(3) under the system initiative braking state, the driver does not trample brake pedal promptly, and main booster mechanism 8 carries out the pressure boost after receiving upper ECU signal, and state was unanimous when two three solenoid valves one this moment, two three solenoid valves two and normal braking, and the system relies on hydraulic pressure sensor to the expectation hydraulic pressure value of mark host computer this moment, is PID control usually, forms closed-loop control, satisfies the system stability.
The hydraulic decoupling control system has the advantages of being novel in structure, using the motor as a power source for assisting to replace an original vacuum source for braking assistance, matching with the solenoid valve to finish hydraulic decoupling, using the two-position three-way solenoid valves for hydraulic decoupling, having cost advantage compared with the existing 5 solenoid valves in common use, being simple in control, high in reaction speed and strong in robustness, and achieving the purpose that the control system forms the switching of braking and boosting logics by controlling the two-position three-way solenoid valves and the main boosting mechanism.
Drawings
FIG. 1 is a system diagram of the present invention.
Detailed Description
As shown in fig. 1, an electronic brake boosting system includes a dual-cavity master cylinder 1, a master cylinder hydraulic sensor 2, a two-position three-way solenoid valve one 3, a pedal simulator 4, a displacement sensor 5, a two-position three-way solenoid valve two 6, a booster cylinder hydraulic sensor 7, a main booster mechanism 8, a liquid storage tank 9 and a brake pedal 10, wherein a runner port 1 of the liquid storage tank 9 is connected with a runner port 2 of the main booster mechanism 8 through a pipeline, the runner port 1 of the main booster mechanism 8 is connected with the runner port 1 of the two-position three-way solenoid valve two 6 through a runner, and the runner port 2 of the two-position three-way solenoid valve two 6 is used for being connected with an ESC/ABS; a runner port 2 of the liquid storage tank 9 is connected with a runner port 3 of the double-cavity master cylinder 1 through a runner, the runner port 1 of the double-cavity master cylinder 1 is connected with a runner port 3 of the two-position three-way electromagnetic valve II 6 through a pipeline, and the runner port 2 of the two-position three-way electromagnetic valve II 6 is used for being connected with ESC/ABS; a runner port 3 of the liquid storage tank 9 is connected with a runner port 4 of the double-cavity master cylinder 1 through a runner, a runner port 2 of the double-cavity master cylinder 1 is connected with a runner port 2 of the two-position three-way electromagnetic valve I3 through a pipeline, a runner port 1 of the two-position three-way electromagnetic valve I3 is connected with a runner port 1 of the pedal simulator 4 through a runner, and the runner port 3 of the two-position three-way electromagnetic valve I3 is used for being connected with ESC/ABS; the runner port 2 of the pedal simulator 4 is connected with the runner port 2 of the liquid storage tank 9 through a runner, and the displacement sensor 5 is fixed on the dual-cavity master cylinder 1.
A flow passage between a flow passage port 2 of a double-cavity master cylinder 1 and a flow passage port 2 of a two-position three-way electromagnetic valve I3 is connected with a master cylinder hydraulic sensor 2.
The main supercharging mechanism 8 is connected with a supercharging cylinder hydraulic sensor 7.
And the flow passage port 1 and the flow passage port 2 in the two-position three-way electromagnetic valve I3 are large-flow normally closed flow passages, and the flow passage port 2 and the flow passage port 3 are small-flow normally open flow passages.
And the flow passage port 1 and the flow passage port 2 in the two-position three-way electromagnetic valve II 6 are large-flow normally closed flow passages, and the flow passage port 2 and the flow passage port 3 are small-flow normally open flow passages.
An electronic brake boosting method comprising:
(1) in a normal system state, when a driver steps on a brake pedal 10, a displacement sensor 5 sends a displacement signal, at the moment, a first two-position three-way electromagnetic valve 3 and a second two-position three-way electromagnetic valve 6 are electrified, a flow channel between a flow channel port 1 and the flow channel port 2 is opened, the flow channel between the flow channel port 2 and the flow channel port 3 is closed, a main booster mechanism 8 starts to act to build pressure, a corresponding unintended pressure value is calculated through displacement according to a p-v characteristic curve existing in a control system, the pressure value is compared with a measured value of a booster cylinder hydraulic sensor 7 to form closed-loop regulation, generally PID regulation is adopted to meet the requirement of pressurization system stability, a double-cavity main cylinder 1 is connected with the brake pedal 10, the brake input force of the driver is led into a pedal simulator 4 to ensure that the brake foot feeling is stable, and after the brake is finished, signals of the main cylinder hydraulic sensor 2 and the displacement sensor 5 return to zero, the two electromagnetic valves are powered off and return to the original state;
as shown in fig. 1: the driver steps on the power of brake pedal, promotes two-chamber master cylinder 1, and the brake fluid flow direction is: the brake fluid pressure control device comprises a flow passage port 3 of a liquid storage tank 9, a flow passage port 4 of a double-cavity master cylinder 1, a flow passage port 2 of the double-cavity master cylinder 1, a flow passage port 2 of a two-position three-way electromagnetic valve 3, a flow passage port 1 of the two-position three-way electromagnetic valve 3 and a flow passage port 1 of a pedal simulator 4, wherein an elastic mechanism in the pedal simulator 4 is compressed by brake fluid to balance the foot feeling of a driver, and the brake fluid in a flow passage from the flow passage port 2 of the pedal simulator 4 to the flow passage port 2 of the liquid storage tank 9 is used for balancing the pressure at two ends of the pedal simulator; simultaneously, the motor in the main supercharging mechanism 8 works to push the brake fluid, and the flow direction is as follows: the fluid flows through a fluid passage port 1 of a fluid storage tank 9, a fluid passage port 2 of a main supercharging mechanism 8, a fluid passage port 1 of the main supercharging mechanism 8, a fluid passage port 1 of a two-position three-way electromagnetic valve II 6 and a fluid passage port 2 of the two-position three-way electromagnetic valve II 6 to ESC/ABS (ESC/ABS is a part of a braking system and is a downstream mechanism of a brake booster generally);
(2) when the motor, the electric appliance and the electric control system are in abnormal states, the two-position three-way electromagnetic valve I3 and the two-position three-way electromagnetic valve II 6 are kept in a power-off state, a flow passage between the flow passage port 1 and the flow passage port 2 is normally closed, a flow passage between the flow passage port 2 and the flow passage port 3 is normally open, and at the moment, the input force of a driver is directly transmitted to a brake pipeline through the double-cavity main cylinder 1, so that redundant braking is brought;
the brake fluid flow direction at this time is: the ESC/ABS is reached through a runner port 3 of a liquid storage tank 9, a runner port 4 of a double-cavity main cylinder 1, a runner port 2 of the double-cavity main cylinder 1, a runner port 2 of a two-position three-way electromagnetic valve I3 and a runner port 3 of the two-position three-way electromagnetic valve I3; the ESC/ABS is reached through a runner port 2 of the liquid storage tank 9, a runner port 3 of the double-cavity master cylinder 1, a runner port 1 of the double-cavity master cylinder 1, a runner port 3 of the two-position three-way electromagnetic valve II 6 and a runner port 2 of the two-position three-way electromagnetic valve II 6;
(3) under the system initiative braking state, the driver does not trample brake pedal promptly, and main booster mechanism 8 carries out the pressure boost after receiving upper ECU signal, and state was unanimous when two three solenoid valve 3, two three solenoid valve 6 and normal braking this moment, and the system relies on hydraulic pressure sensor 7 to the expectation hydraulic pressure value of mark host computer this moment, is PID control usually, forms closed-loop control, satisfies the system stability.
Claims (6)
1. An electronic brake boosting system, characterized in that: the device comprises a double-cavity master cylinder, a master cylinder hydraulic sensor, a two-position three-way electromagnetic valve I, a pedal simulator, a displacement sensor, a two-position three-way electromagnetic valve II, a pressure cylinder hydraulic sensor, a main pressurizing mechanism, a liquid storage tank and a brake pedal, wherein a runner port 1 of the liquid storage tank is connected with a runner port 2 of the main pressurizing mechanism through a pipeline, the runner port 1 of the main pressurizing mechanism is connected with the runner port 1 of the two-position three-way electromagnetic valve II through a runner, and the runner port 2 of the two-position three-way electromagnetic valve II is used for being connected with ESC/ABS; a runner port 2 of the liquid storage tank is connected with a runner port 3 of the double-cavity master cylinder through a runner, a runner port 1 of the double-cavity master cylinder is connected with a runner port 3 of the two-position three-way electromagnetic valve II through a pipeline, and the runner port 2 of the two-position three-way electromagnetic valve II is used for being connected with ESC/ABS; a runner port 3 of the liquid storage tank is connected with a runner port 4 of the double-cavity master cylinder through a runner, a runner port 2 of the double-cavity master cylinder is connected with a runner port 2 of the two-position three-way electromagnetic valve I through a pipeline, a runner port 1 of the two-position three-way electromagnetic valve I is connected with a runner port 1 of the pedal simulator through a runner, and a runner port 3 of the two-position three-way electromagnetic valve I is used for being connected with ESC/ABS; the runner port 2 of the pedal simulator is connected with the runner port 2 of the liquid storage tank through a runner, and the displacement sensor is fixed on the double-cavity main cylinder.
2. An electronic brake boosting system according to claim 1, wherein: and a flow passage between the flow passage port 2 of the double-cavity master cylinder and the flow passage port 2 of the two-position three-way electromagnetic valve I is connected with the master cylinder hydraulic sensor.
3. An electronic brake boosting system according to claim 1, wherein: and the main supercharging mechanism is connected with a supercharging cylinder hydraulic sensor.
4. An electronic brake boosting system according to claim 1, wherein: the flow passage port 1 and the flow passage port 2 in the two-position three-way electromagnetic valve I are large-flow normally closed flow passages, and the flow passage port 2 and the flow passage port 3 are small-flow normally open flow passages.
5. An electronic brake boosting system according to claim 1, wherein: and the flow passage port 1 and the flow passage port 2 in the two-position three-way electromagnetic valve II are large-flow normally closed flow passages, and the flow passage port 2 and the flow passage port 3 are small-flow normally open flow passages.
6. A method of using the electronic brake boosting system of claim 1, comprising:
(1) in the normal state of the system, when a driver steps on a brake pedal, a displacement sensor sends out a displacement signal, the two-position three-way electromagnetic valve I and the two-position three-way electromagnetic valve II are electrified, a flow passage between the flow passage opening 1 and the flow passage opening 2 is opened, the flow passage between the flow passage opening 2 and the flow passage opening 3 is closed, and simultaneously, a main booster mechanism starts to act to build pressure, according to the p-v characteristic curve existing in the control system, the corresponding unintended pressure value is calculated through the displacement, the pressure value is compared with the measured value of the hydraulic sensor of the booster cylinder to form closed-loop regulation, generally PID regulation is adopted to meet the stability of the booster system, the double-cavity master cylinder is connected with the brake pedal, the brake input force of a driver is led into the pedal simulator to ensure the stability of the brake foot feeling, after braking is finished, signals of the main cylinder hydraulic sensor and the displacement sensor return to zero, and the two electromagnetic valves are powered off and return to the original state;
(2) when the motor, the electric appliance and the electric control system are in abnormal states, the two-position three-way electromagnetic valve I and the two-position three-way electromagnetic valve II are kept in a power-off state, a flow passage between the flow passage port 1 and the flow passage port 2 is normally closed, a flow passage between the flow passage port 2 and the flow passage port 3 is normally open, and at the moment, the input force of a driver is directly transmitted to a brake pipeline through the double-cavity master cylinder, so that redundant braking is brought;
(3) under the system initiative braking state, the driver does not trample brake pedal promptly, and main booster mechanism 8 carries out the pressure boost after receiving upper ECU signal, and state was unanimous when two three solenoid valves one this moment, two three solenoid valves two and normal braking, and the system relies on hydraulic pressure sensor to the expectation hydraulic pressure value of mark host computer this moment, is PID control usually, forms closed-loop control, satisfies the system stability.
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| CN202110746879.4A CN113306539A (en) | 2021-06-30 | 2021-06-30 | Electronic brake boosting system and method |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110746879.4A CN113306539A (en) | 2021-06-30 | 2021-06-30 | Electronic brake boosting system and method |
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| CN113306539A true CN113306539A (en) | 2021-08-27 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113830058A (en) * | 2021-11-05 | 2021-12-24 | 格陆博科技有限公司 | Line-controlled hydraulic braking system and method |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113830058A (en) * | 2021-11-05 | 2021-12-24 | 格陆博科技有限公司 | Line-controlled hydraulic braking system and method |
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