CN105501204A - Active collision-avoidance system based on novel solenoid valve controlling hydraulic braking and braking method - Google Patents
Active collision-avoidance system based on novel solenoid valve controlling hydraulic braking and braking method Download PDFInfo
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- CN105501204A CN105501204A CN201610023731.7A CN201610023731A CN105501204A CN 105501204 A CN105501204 A CN 105501204A CN 201610023731 A CN201610023731 A CN 201610023731A CN 105501204 A CN105501204 A CN 105501204A
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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
- B60T7/00—Brake-action initiating means
- B60T7/12—Brake-action initiating means for automatic initiation; for initiation not subject to will of driver or passenger
-
- 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
- B60T2201/00—Particular use of vehicle brake systems; Special systems using also the brakes; Special software modules within the brake system controller
- B60T2201/02—Active or adaptive cruise control system; Distance control
- B60T2201/022—Collision avoidance systems
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- Mechanical Engineering (AREA)
- Regulating Braking Force (AREA)
Abstract
The invention discloses an active collision-avoidance system based on novel solenoid valve controlling hydraulic braking and a braking method. The active collision-avoidance system comprises a braking pedal sensor, a braking pedal sensing simulator, a wheel speed sensor, an asymmetric hydraulic braking wheel cylinder, a solenoid operated four-way valve, an overflow valve, an oil tank, a hydraulic pump, an energy accumulator, an electronic control unit, a laser radar detection module and a buzzer. A braking master cylinder of a traditional hydraulic braking system is removed, the solenoid operated four-way valve is adopted to replace a complex braking valve, and a traditional braking wheel cylinder is changed into the asymmetric hydraulic braking wheel cylinder. Braking modes can be switched more rapidly by matching the asymmetric hydraulic braking wheel cylinder with the solenoid operated four-way valve, and pressurization, pressure maintaining and pressure reduction of the system can be achieved. The braking pedal sensor is adopted to discover a wrong braking behavior of a driver in time, a vehicle in the front is monitored through a radar system in real time, the distance, direction and relative speed between a vehicle and the vehicle in the front are judged, an alarm can be given if necessary, vehicle active collision avoidance can be achieved through control of an ECU, and it is guaranteed that the vehicle is driven safely.
Description
Technical field
The invention belongs to vehicle brake technology field, particularly relate to a kind of Active collision avoidance system based on electromagnetic valve control hydraulic braking and braking method.
Background technology
Along with the increase of automobile pollution, safety traffic has become one of problem that people are concerned about the most, and it is directly connected to the life security of people and the loss of property.Conventional braking systems controls just pilot control one group of simple mechanical device and applies application force to drg, and under the situation that, speed less at car mass is lower, mechanical braking can meet car brakeing requirement.Along with the increase of car mass, the speed of a motor vehicle, traditional mechanical braking far from can meet the demand of vehicle to high deceleration and stopping performance.In the display of driver fatigue state data, the traffic accident of 70% ~ 90% is had to be caused by driver's operation error.If can chaufeur be reminded before accident occurs to note and help chaufeur to take safety measures in an emergency situation, very useful beyond doubt to the generation reducing traffic accident, Automotive active anti-collision system realizes the technological means of this function just.
EHB is one of critical facility on vehicle, and it is directly connected to traffic safety performance.The mechanical breakdown of vehicle can be reduced, increase the safety of driving.Hydraulic brake system in the brake system used at present is all that brake pedal control master brake cylinder transmits and performs the braking instruction of chaufeur, and the method can lengthen braking time.Existing hydraulic brake system has master brake cylinder and apportioning valve hydraulic valve, reducing valve, pressure charging valve etc., and it is larger that complex structure controls difficult volume and weight.In addition, due to the braking of chaufeur mistake or do not brake, in high-speed crash, traditional passive security can not the generation of actv. reduction accident, and more scholar begins one's study this concept of active safety.
Summary of the invention
When braking, braking time is lengthened to overcome master brake cylinder, the volume of hydraulic brake system and the problem of weight, and realize requirement that hydraulic efficiency pressure system controls flexibly and can the stability of strengthening system and robustness, and reduce the generation of traffic accident, the present invention proposes a kind of Active collision avoidance system based on electromagnetic valve control hydraulic braking, adopts following technical scheme:
Based on an Active collision avoidance system for electromagnetic valve control hydraulic braking, comprising: brake pedal sensor, brake pedal feel simulator, wheel speed sensors, asymmetric hydraulic braking wheel cylinder, solenoid operated four-way valve, by pass valve, fuel tank, Hydraulic Pump, energy storage, ECU (Electrical Control Unit), laser radar detection module;
Described brake pedal sensor is arranged on below brake pedal, and for gathering the stroke of brake pedal, acceleration/accel and treadle effort, described brake pedal sensor is connected with described ECU (Electrical Control Unit); Described wheel speed sensors is arranged on wheel side, and for gathering speed information, described wheel speed sensors is connected with described ECU (Electrical Control Unit); Described laser radar detection module is arranged on directly over car radiation fence, and for detecting distance, orientation and the relative velocity between this car and front vehicles, described laser radar detection module is connected with described ECU (Electrical Control Unit);
The I port of the described asymmetric hydraulic braking wheel cylinder of A port connection of described solenoid operated four-way valve, B port connect the O port of asymmetric hydraulic braking wheel cylinder; Described fuel tank connects the inlet of described Hydraulic Pump, the liquid outlet of described Hydraulic Pump connects the inlet of described energy storage, the liquid outlet of described energy storage connects the P port of described solenoid operated four-way valve, the P port of described solenoid operated four-way valve is also connected with one end of described by pass valve, the other end of described by pass valve is connected with described fuel tank, and the T port of solenoid operated four-way valve connects fuel tank; Described asymmetric hydraulic braking wheel cylinder is arranged on brake clamp;
Described ECU (Electrical Control Unit) receives the information of described brake pedal sensor, wheel speed sensors, laser radar detection module, exports braking information to solenoid operated four-way valve according to vehicle running state.
Further preferably, described ECU (Electrical Control Unit) is realized by controlled vehicle-mounted electrical unit ECU; Described laser radar detection module is realized by vehicle scanning laser radar system; Described energy storage is that the Hydraulic Pump controlled by described ECU (Electrical Control Unit) ECU realizes pressurization.
Further preferably, the connection between described solenoid operated four-way valve and described asymmetric hydraulic braking wheel cylinder, the connection between described fuel tank and described Hydraulic Pump, the connection between described Hydraulic Pump and described energy storage, the connection between described energy storage and described solenoid operated four-way valve, the connection between described solenoid operated four-way valve and described by pass valve, the connection between described by pass valve and described fuel tank, connection between described solenoid operated four-way valve and described fuel tank all adopt brake piping mode to connect.
Further preferably, also comprise buzzer phone, described buzzer phone is reported to the police to driver Ben Che and leading vehicle distance are less than safety distance time.
Based on above-mentioned Active collision avoidance system, the invention allows for a kind of braking method, comprise following situation:
1) when driver steps on brake pedal for taking braking to driving vehicle, brake pedal sensor is by finding out the acceleration/accel of brake pedal motion, stroke and treadle effort distinguish the braking intention of driver, signal is passed to ECU (Electrical Control Unit) ECU, ECU (Electrical Control Unit) ECU collects the signal of wheel speed sensors, the optimum braking force of each wheel is calculated according to vehicle running state, send instruction and from fuel tank, extract braking liquid to energy storage pressurization generation high-pressure brake liquid to Hydraulic Pump, issue instructions to solenoid operated four-way valve simultaneously, solenoid operated four-way valve is opened and is controlled the left cylinder that high-pressure brake liquid enters asymmetric hydraulic braking wheel cylinder, and the braking liquid of the right cylinder of asymmetric hydraulic braking wheel cylinder is discharged by solenoid operated four-way valve, realize snap catch supercharging,
2) when driver to step on for taking service lap to driving vehicle brake pedal keep motionless time, brake pedal sensor is by the braking intention of finding out the acceleration/accel of brake pedal motion, stroke and treadle effort distinguish driver, signal is passed to ECU (Electrical Control Unit) ECU, ECU (Electrical Control Unit) ECU collects the signal of wheel speed sensors, issue instructions to solenoid operated four-way valve again, the inlet of solenoid operated four-way valve and leakage fluid dram are closed, and realize stablizing service lap;
3) when driver for driving vehicle is taked braking and loosen the brake time, brake pedal sensor is by finding out the acceleration/accel of brake pedal motion, stroke and treadle effort distinguish the braking intention of driver, signal is passed to ECU (Electrical Control Unit) ECU, ECU (Electrical Control Unit) ECU collects the signal of wheel speed sensors, the optimum braking force of each wheel is calculated according to vehicle running state, send instruction and from fuel tank, extract braking liquid to energy storage pressurization generation high-pressure brake liquid to Hydraulic Pump, issue instructions to solenoid operated four-way valve simultaneously, solenoid operated four-way valve is opened and is controlled the right cylinder that high-pressure brake liquid enters asymmetric hydraulic braking wheel cylinder, and the braking liquid of the left cylinder of asymmetric hydraulic braking wheel cylinder is discharged by solenoid operated four-way valve, realize snap catch decompression,
4) when driver's fatigue state or misoperation, cause when could not brake in time or not brake, laser radar detection module is by radar system moment monitoring front vehicles, the distance between Ben Che and front truck, orientation and relative velocity is judged to send to ECU (Electrical Control Unit) ECU, after ECU (Electrical Control Unit) ECU receives information that laser radar detection module sends over and the speed information that wheel speed sensors gathers, carry out Calculation of Safety Distance and safety distance identification, determine whether to carry out Collision avoidance; When needs carry out Collision avoidance, ECU (Electrical Control Unit) ECU calculates the optimum braking force of each wheel according to vehicle running state, issue instructions to solenoid operated four-way valve again, solenoid operated four-way valve is opened and is controlled the left cylinder that high-pressure brake liquid enters asymmetric hydraulic braking wheel cylinder, and the braking liquid of the right cylinder of asymmetric hydraulic braking wheel cylinder is discharged by solenoid operated four-way valve, realize automobile brake and Collision avoidance.
Compared with prior art, beneficial effect of the present invention:
(1) remove the master brake cylinder of conventional hydraulic brake system, adopt brake pedal and brake pedal sensor collection and transmit the braking instruction of chaufeur, reducing braking time.
(2) adopt solenoid operated four-way valve to replace complicated brake activation valve, and change traditional brake wheel cylinder into asymmetric hydraulic braking wheel cylinder, realize requirement that hydraulic efficiency pressure system controls flexibly and can the stability of strengthening system, reduce volume and the weight of brake system.
(3) adopt asymmetric brake fluid pressure wheel cylinder to coordinate solenoid operated four-way valve can switch braking mode sooner and realize the supercharging of system, pressurize and decompression.
(4) the wrong braking action of brake pedal sensor Timeliness coverage chaufeur is adopted, radar system moment monitoring front vehicles can be passed through, judge the distance between this car and front truck, orientation and relative velocity, when there is potential collision risk, driver is warned, and by the control realization Collision avoidance of ECU (Electrical Control Unit) ECU, automobile is initiatively averted danger, ensures the extent of injury of the reduction accident of vehicle safe driving or maximum possible.
(5) brake system hydraulic mechanism (comprising fuel tank, Hydraulic Pump, energy storage, solenoid operated four-way valve, by pass valve) is modular unit, be contained in black box, be arranged on automobile domain, the degree of modularity is high, the alerting ability of design is turn improved in Car design process, decrease the amount of parts of brake system, save the arrangement space of car inside brake system.
Accompanying drawing explanation
Fig. 1 is the Active collision avoidance system figure based on electromagnetic valve control hydraulic braking;
Fig. 2 is the fundamental diagram of the Active collision avoidance system based on electromagnetic valve control hydraulic braking;
Fig. 3 the present invention realizes the diagram of circuit of Collision avoidance;
The effect schematic diagram of Fig. 4 Collision avoidance of the present invention.
Mark the price in figure, 1-brake pedal sensor, 2-brake pedal, 3-brake pedal feel simulator, the asymmetric hydraulic braking wheel cylinder of 4-, 6-wheel speed sensors, 7-wheel, 8-solenoid operated four-way valve, 9-by pass valve, 10-fuel tank, 11-Hydraulic Pump, 12-energy storage, 13-ECU (Electrical Control Unit) ECU, 14-laser radar detection module, 15-buzzer phone.
Detailed description of the invention
Below in conjunction with the drawings and specific embodiments, the invention will be further described.
As shown in Figure 1, for the Active collision avoidance system based on electromagnetic valve control hydraulic braking that the present invention proposes, comprise brake pedal sensor 1, brake pedal feel simulator 3, wheel speed sensors 6, asymmetric hydraulic braking wheel cylinder 4, solenoid operated four-way valve 8, by pass valve 9, fuel tank 10, Hydraulic Pump 11, energy storage 12, ECU (Electrical Control Unit), laser radar detection module 14 and buzzer phone 15; Described brake pedal sensor 1 is arranged on below brake pedal 2, and for gathering the stroke of brake pedal 2, acceleration/accel and treadle effort, described brake pedal sensor 1 is connected with described ECU (Electrical Control Unit); The piston of described brake pedal feel simulator 3 connects brake pedal 2, and brake-pedal travel affects piston displacement, thus simulating brake pedal characteristic, chaufeur produces brake feel; Described wheel speed sensors 6 is arranged on wheel side, and for gathering speed information, described wheel speed sensors 6 is connected with described ECU (Electrical Control Unit); Described laser radar detection module 14 is arranged on position near vehicle front car light, and for detecting distance, orientation and the relative velocity between this car and front vehicles, described laser radar detection module 14 is connected with described ECU (Electrical Control Unit);
The I port of the described asymmetric hydraulic braking wheel cylinder 4 of A port connection of described solenoid operated four-way valve 8, B port connect the O port of asymmetric hydraulic braking wheel cylinder 4; Described fuel tank 10 connects the inlet of described Hydraulic Pump 11, the liquid outlet of described Hydraulic Pump 11 connects the inlet of described energy storage 12, the liquid outlet of described energy storage 12 connects the P port of described solenoid operated four-way valve 8, the T port of described solenoid operated four-way valve 8 is also connected with one end of described by pass valve 9, the other end of described by pass valve 9 is connected with described fuel tank 10, and the O port of solenoid operated four-way valve 8 connects fuel tank 10; Described asymmetric hydraulic braking wheel cylinder 4 is arranged on brake clamp; Described energy storage 12 is that the Hydraulic Pump 11 controlled by described ECU (Electrical Control Unit) ECU realizes pressurization.
Described ECU (Electrical Control Unit) receives the information of described brake pedal sensor 1, brake pedal feel simulator 3 and wheel speed sensors 6, laser radar detection module 14, exports braking information realize car brakeing to solenoid operated four-way valve 8 according to vehicle running state.Described ECU (Electrical Control Unit) is realized by controlled vehicle-mounted electrical unit ECU13, and described laser radar detection module 14 is realized by vehicle scanning laser radar system.
Brake system hydraulic mechanism (comprising fuel tank, Hydraulic Pump, energy storage, solenoid operated four-way valve, by pass valve) is modular unit, is contained in black box, is arranged on automobile domain.
As shown in Figures 2 and 3, the braking method based on the Active collision avoidance system shown in Fig. 1 is divided into following situation:
(1) when driver steps on brake pedal 2 for taking braking to driving vehicle, the acceleration/accel that brake pedal sensor 1 is moved by finding out brake pedal 2, stroke and treadle effort distinguish the braking intention of driver, signal is passed to ECU (Electrical Control Unit) ECU13, ECU (Electrical Control Unit) ECU13 collects the signal of wheel speed sensors 6, the optimum braking force of each wheel 7 is calculated according to vehicle running state, send instruction and from fuel tank 10, extract braking liquid to energy storage 12 pressurization generation high-pressure brake liquid to Hydraulic Pump 11, issue instructions to solenoid operated four-way valve 8 simultaneously, solenoid operated four-way valve 8 is opened and is controlled the left cylinder that high-pressure brake liquid enters asymmetric hydraulic braking wheel cylinder 4, and the braking liquid of the right cylinder of asymmetric hydraulic braking wheel cylinder 4 is discharged by solenoid operated four-way valve 8, realize snap catch supercharging,
(2) when driver to step on for taking service lap to driving vehicle brake pedal 2 keep motionless time, brake pedal sensor 1 distinguishes the braking intention of driver by the acceleration/accel of finding out brake pedal 2 and moving, stroke and treadle effort, signal is passed to ECU (Electrical Control Unit) ECU13, ECU (Electrical Control Unit) ECU13 collects the signal of wheel speed sensors 6, issue instructions to solenoid operated four-way valve 8 again, the inlet of solenoid operated four-way valve 8 and leakage fluid dram are closed, and realize stablizing service lap;
(3) when driver for driving vehicle is taked braking and loosen the brake 2 time, the acceleration/accel that brake pedal sensor 1 is moved by finding out brake pedal 2, stroke and treadle effort distinguish the braking intention of driver, signal is passed to ECU (Electrical Control Unit) ECU13, ECU (Electrical Control Unit) ECU13 collects the signal of wheel speed sensors 6, the optimum braking force of each wheel 7 is calculated according to vehicle running state, send instruction and from fuel tank 10, extract braking liquid to energy storage 12 pressurization generation high-pressure brake liquid to Hydraulic Pump 11, issue instructions to solenoid operated four-way valve 8 simultaneously, solenoid operated four-way valve 8 is opened and is controlled the right cylinder that high-pressure brake liquid enters asymmetric hydraulic braking wheel cylinder 4, and the braking liquid of the left cylinder of asymmetric hydraulic braking wheel cylinder 4 is discharged by solenoid operated four-way valve 8, realize snap catch decompression,
(4) when driver's fatigue state or misoperation, cause when could not brake in time or not brake, laser radar detection module 14 is by radar system moment monitoring front vehicles, the distance between Ben Che and front truck, orientation and relative velocity is judged to send to ECU (Electrical Control Unit) ECU13, after ECU (Electrical Control Unit) ECU13 receives information that laser radar detection module 14 sends over and the speed information that wheel speed sensors 6 gathers, carry out Calculation of Safety Distance and safety distance identification, determine whether to carry out Collision avoidance; As shown in Figure 4, time t
1moment, this car that laser radar detection module detects is less than the safety distance of automobile with the actual distance of front truck, and automobile can carry out security alarm, under Conventional braking systems by buzzer phone 15, if chaufeur do not take braking or do not brake in time, will occur as
shown collision; Under the Active collision avoidance system of the use electromagnetic valve control hydraulic braking of the present invention's proposition, the time in of being less than safety distance, Collision avoidance function can be started, Jiang Huiru
shown in realize the Collision avoidance of automobile.When needs carry out Collision avoidance, ECU (Electrical Control Unit) ECU13 calculates the optimum braking force of each wheel 7 according to vehicle running state, issue instructions to solenoid operated four-way valve 8 again, solenoid operated four-way valve 8 is opened and is controlled the left cylinder that high-pressure brake liquid enters asymmetric hydraulic braking wheel cylinder 4, and the braking liquid of the right cylinder of asymmetric hydraulic braking wheel cylinder 4 is discharged by solenoid operated four-way valve 8, realize automobile brake and Collision avoidance.
The above is only for describing technical scheme of the present invention and specific embodiment; the protection domain be not intended to limit the present invention; be to be understood that; under the prerequisite without prejudice to flesh and blood of the present invention and spirit, institute changes, improve or be equal to replacement etc. all will fall within the scope of protection of the present invention.
Claims (7)
1. the Active collision avoidance system based on electromagnetic valve control hydraulic braking, it is characterized in that, comprising: brake pedal sensor (1), brake pedal feel simulator (3), wheel speed sensors (6), asymmetric hydraulic braking wheel cylinder (4), solenoid operated four-way valve (8), by pass valve (9), fuel tank (10), Hydraulic Pump (11), energy storage (12), ECU (Electrical Control Unit), laser radar detection module (14);
Described brake pedal sensor (1) is arranged on brake pedal (2) below, for gathering the stroke of brake pedal (2), acceleration/accel and treadle effort, described brake pedal sensor (1) is connected with described ECU (Electrical Control Unit); The piston of described brake pedal feel simulator (3) connects brake pedal (2); Described wheel speed sensors (6) is arranged on wheel (7) side, and for gathering speed information, described wheel speed sensors (6) is connected with described ECU (Electrical Control Unit); Described laser radar detection module (14) is arranged on directly over car radiation fence, for detecting distance, orientation and the relative velocity between this car and front vehicles, described laser radar detection module (14) is connected with described ECU (Electrical Control Unit);
The I port of the described asymmetric hydraulic braking wheel cylinder (4) of A port connection of described solenoid operated four-way valve (8), B port connect the O port of asymmetric hydraulic braking wheel cylinder (4); Described fuel tank (10) connects the inlet of described Hydraulic Pump (11), the liquid outlet of described Hydraulic Pump (11) connects the inlet of described energy storage (12), the liquid outlet of described energy storage (12) connects the P port of described solenoid operated four-way valve (8), the P port of described solenoid operated four-way valve (8) is also connected with one end of described by pass valve (9), the other end of described by pass valve (9) is connected with described fuel tank (10), and the T port of solenoid operated four-way valve (8) connects fuel tank (10); Described asymmetric hydraulic braking wheel cylinder (4) is arranged on brake clamp;
Described ECU (Electrical Control Unit) receives the information of described brake pedal sensor (1), wheel speed sensors (6), laser radar detection module (14), export braking information to solenoid operated four-way valve (8) according to vehicle running state, realize car brakeing.
2. a kind of Active collision avoidance system based on electromagnetic valve control hydraulic braking according to claim 1, is characterized in that, described ECU (Electrical Control Unit) is realized by controlled vehicle-mounted electrical unit ECU (13).
3. a kind of Active collision avoidance system based on electromagnetic valve control hydraulic braking according to claim 1, is characterized in that, described laser radar detection module (14) is realized by vehicle scanning laser radar system.
4. a kind of Active collision avoidance system based on electromagnetic valve control hydraulic braking according to claim 1, it is characterized in that, described energy storage (12) is that the Hydraulic Pump (11) controlled by described ECU (Electrical Control Unit) ECU (13) realizes pressurization.
5. a kind of Active collision avoidance system based on electromagnetic valve control hydraulic braking according to claim 1, it is characterized in that, connection between described solenoid operated four-way valve (8) and described asymmetric hydraulic braking wheel cylinder (4), connection between described fuel tank (10) and described Hydraulic Pump (11), connection between described Hydraulic Pump (11) and described energy storage (12), connection between described energy storage (12) and described solenoid operated four-way valve (8), connection between described solenoid operated four-way valve (8) and described by pass valve (9), connection between described by pass valve (9) and described fuel tank (10), connection between described solenoid operated four-way valve (8) and described fuel tank (10) all adopts brake piping mode to connect.
6. a kind of Active collision avoidance system based on electromagnetic valve control hydraulic braking according to claim 1, it is characterized in that, also comprise buzzer phone (15), described buzzer phone (15) is reported to the police to driver Ben Che and leading vehicle distance are less than safety distance time.
7. based on a braking method for the Active collision avoidance system of electromagnetic valve control hydraulic braking, it is characterized in that, comprise following situation:
1) when driver steps on brake pedal (2) for taking braking to driving vehicle, the acceleration/accel that brake pedal sensor (1) is moved by finding out brake pedal (2), stroke and treadle effort distinguish the braking intention of driver, signal is passed to ECU (Electrical Control Unit) ECU (13), ECU (Electrical Control Unit) ECU (13) collects the signal of wheel speed sensors (6), the optimum braking force of each wheel (7) is calculated according to vehicle running state, send instruction and from fuel tank (10), extract braking liquid to energy storage (12) pressurization generation high-pressure brake liquid to Hydraulic Pump (11), issue instructions to solenoid operated four-way valve (8) simultaneously, solenoid operated four-way valve (8) is opened and is controlled the left cylinder that high-pressure brake liquid enters asymmetric hydraulic braking wheel cylinder (4), and the braking liquid of the right cylinder of asymmetric hydraulic braking wheel cylinder (4) is discharged by solenoid operated four-way valve (8), realize snap catch supercharging,
2) when driver to step on for taking service lap to driving vehicle brake pedal (2) keep motionless time, brake pedal sensor (1) distinguishes the braking intention of driver by acceleration/accel, stroke and the treadle effort of finding out brake pedal (2) and moving, signal is passed to ECU (Electrical Control Unit) ECU (13), ECU (Electrical Control Unit) ECU (13) collects the signal of wheel speed sensors (6), issue instructions to solenoid operated four-way valve (8) again, the inlet of solenoid operated four-way valve (8) and leakage fluid dram are closed, and realize stablizing service lap;
3) when driver for driving vehicle is taked braking and loosen the brake (2) time, the acceleration/accel that brake pedal sensor (1) is moved by finding out brake pedal (2), stroke and treadle effort distinguish the braking intention of driver, signal is passed to ECU (Electrical Control Unit) ECU (13), ECU (Electrical Control Unit) ECU (13) collects the signal of wheel speed sensors (6), the optimum braking force of each wheel (7) is calculated according to vehicle running state, send instruction and from fuel tank (10), extract braking liquid to energy storage (12) pressurization generation high-pressure brake liquid to Hydraulic Pump (11), issue instructions to solenoid operated four-way valve (8) simultaneously, solenoid operated four-way valve (8) is opened and is controlled the right cylinder that high-pressure brake liquid enters asymmetric hydraulic braking wheel cylinder (4), and the braking liquid of the left cylinder of asymmetric hydraulic braking wheel cylinder (4) is discharged by solenoid operated four-way valve (8), realize snap catch decompression,
4) when driver's fatigue state or misoperation, cause when could not brake in time or not brake, laser radar detection module (14) is by radar system moment monitoring front vehicles, the distance between Ben Che and front truck, orientation and relative velocity is judged to send to ECU (Electrical Control Unit) ECU (13), after ECU (Electrical Control Unit) ECU (13) receives information that laser radar detection module (14) sends over and the speed information that wheel speed sensors (6) gathers, carry out Calculation of Safety Distance and safety distance identification, determine whether to carry out Collision avoidance; When needs carry out Collision avoidance, ECU (Electrical Control Unit) ECU (13) calculates the optimum braking force of each wheel according to vehicle running state, issue instructions to solenoid operated four-way valve (8) again, solenoid operated four-way valve (8) is opened and is controlled the left cylinder that high-pressure brake liquid enters asymmetric hydraulic braking wheel cylinder (4), and the braking liquid of the right cylinder of asymmetric hydraulic braking wheel cylinder (4) is discharged by solenoid operated four-way valve (8), realize automobile brake and Collision avoidance.
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| CN201610023731.7A CN105501204A (en) | 2016-01-14 | 2016-01-14 | Active collision-avoidance system based on novel solenoid valve controlling hydraulic braking and braking method |
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| CN108050112A (en) * | 2017-11-10 | 2018-05-18 | 西安理工大学 | The control pressurer system and its control method of a kind of asymmetrical hydraulic cylinder |
| CN108128293A (en) * | 2017-12-27 | 2018-06-08 | 江苏金坛大迈汽车工程研究院有限公司 | A kind of autonomous anti-collision system of vehicle |
| GB2588187A (en) * | 2019-10-11 | 2021-04-21 | Caterpillar Inc | Braking system |
| CN114604215A (en) * | 2022-02-28 | 2022-06-10 | 浙江吉尚汽车部件有限公司 | Electronic brake system |
| CN115352418A (en) * | 2022-09-30 | 2022-11-18 | 陕西弘毅正清智能科技有限公司 | Braking system and method of unmanned formula car |
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| CN115352418A (en) * | 2022-09-30 | 2022-11-18 | 陕西弘毅正清智能科技有限公司 | Braking system and method of unmanned formula car |
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