CN103072486A - Electronic parking brake control system and automobile using same - Google Patents
Electronic parking brake control system and automobile using same Download PDFInfo
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- CN103072486A CN103072486A CN2013100386873A CN201310038687A CN103072486A CN 103072486 A CN103072486 A CN 103072486A CN 2013100386873 A CN2013100386873 A CN 2013100386873A CN 201310038687 A CN201310038687 A CN 201310038687A CN 103072486 A CN103072486 A CN 103072486A
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- during standstill
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Abstract
The invention relates to an electronic parking brake control system and an automobile using the same. The electronic parking brake control system comprises an emergency brake solenoid valve and a parking brake solenoid valve, wherein one end of the emergency brake solenoid valve is used for connecting with a negative pole of a power supply through a wire, the other end of the emergency brake solenoid valve is connected with an emergency brake control output end of an electronic parking brake control electronic control unit (ECU), an air inlet of the emergency brake solenoid valve is connected with an air storage device through a pipeline, an air outlet of the emergency brake solenoid valve is used for connecting with a main brake air chamber of an automobile brake air chamber through a pipeline and an air change-over valve, and a vent hole of the emergency brake solenoid valve is connected with the atmosphere; and one end of the parking brake solenoid valve is used for connecting with the negative pole of the power supply through the wire, the other end of the parking brake solenoid valve is connected with a parking brake control output end of the electronic parking brake control ECU, an air inlet of the parking brake solenoid valve is connected with the air storage device through a pipeline, an air outlet of the parking brake solenoid valve is used for connecting with the parking brake air chamber of the automobile brake air chamber through a pipeline, and a vent hole of the parking brake solenoid valve is connected with the atmosphere. The unreliable brake control problem of a parking brake system of an existing pneumatic brake automobile is solved.
Description
Technical field
The present invention relates to a kind of electronic brake control system and use the automobile of this system.
Background technology
Using the emergency brake system of air braking vehicle at present mostly is the mechanical type parking brake control system, the braking during standstill controller is arranged near the chaufeur, pull-up brake-applying handle when chaufeur needs Parking, the gas that makes automobile brake chamber control braking during standstill is discharged to realizes braking during standstill in the atmosphere, this structure is full mechanical mechanism, braking during standstill controller volume is larger, the layout that is unfavorable for cab space, what need during simultaneously braking during standstill operation is firmly also larger, frequent operation makes the labour intensity of chaufeur larger, if chaufeur is firmly less, also have braking risk not in place, if forget the pull-up brake-applying handle when chaufeur stops, automobile just can not be realized braking during standstill, the risk that has the automobile Sliding carriage with three wheels can cause the grave accident of car crash when serious.
The electronic parking system is also referred to as the electronics parking brake, refer to the provisional braking in the running process and the stagnation of movement chaufeur long-time parking braking function behind the car is combined, and realize the automatic control that automobile parking braking produces and removes by electronic control mode.Can guarantee that at the stagnation of movement chaufeur automobile still remains on the original place behind car, particularly stop in the original place on the ramp, the car phenomenon can not occur slipping.
Braking during standstill is also referred to as center brake, it is mainly as stopping brake, its lock torque general action is on the transmission shaft of car transmissions, then hand braking air chamber and service brake air chamber being combined of having becomes the combined type compressed air brake cylinder, lock torque directly acts on the wheel, thereby realizes braking during standstill and two kinds of functions of service brake.
Application number is in one piece of patent " air-pressure type electronic emergency brake system and braking method " of 201010238129.8, a kind of air-pressure type electronic emergency brake system is disclosed, this brake system comprises air receiver, hand brake switch, hand braking air chamber, be connected by air pipe between air receiver and the hand braking air chamber, it also comprises air-pressure type electronic Parking valve, the braking during standstill controller, air-pressure type electronic Parking valve is connected between air receiver and the hand braking air chamber, the braking during standstill controller is connected between hand brake switch and the air-pressure type electronic Parking valve, and hand brake switch can also can be mechanical type for electronic type.Although this system has adopted electronic brake, and realized the automatic control of the braking during standstill of air braking vehicle, but work as vehicle stop, and chaufeur is forgotten when opening hand brake switch, automobile just can not be realized braking during standstill, still there is the danger of Sliding carriage with three wheels, in addition, in vehicle traveling process, if the speed of a motor vehicle is very fast, in the time of need to braking at once when being in an emergency, the braking during standstill controller can't judge it is braking in which kind of situation, may cause because automobile brake is untimely the grave accident of car crash.
Summary of the invention
The purpose of this invention is to provide a kind of electronic brake control system and use the automobile of this system, in order to solve the insecure problem of emergency brake system braking control of existing air braking vehicle.
For achieving the above object, the invention provides a kind of electronic brake control system, comprise electronic brake control ECU, electronic brake switch and automobile brake chamber, one end of described electronic brake switch connects the signal input part of described electronic brake control ECU, the other end is used for connecting power supply, described electronic brake control ECU is provided with for the port that receives vehicle speed signal, its power positive end is used for being connected to by ignition lock the positive pole of described power supply, its power-extremely is used for being wired to the negative pole of described power supply, described automobile brake chamber comprises main brake air chamber and braking during standstill air chamber, this electronic brake control system also comprises emergency brake electromagnetic valve and braking during standstill electromagnetic valve, one end of described emergency brake electromagnetic valve is used for the negative pole by wire connecting power, the emergency brake control output end of other end connecting electronic braking during standstill control ECU, its induction opening connects accumulator unit by pipeline, its air gate is used for being connected to by pipeline and gas change-over valve the main brake air chamber of automobile brake chamber, and its deflation hole is connected with atmosphere;
One end of described braking during standstill electromagnetic valve is used for the negative pole by wire connecting power, the braking during standstill control output end of other end connecting electronic braking during standstill control ECU, its induction opening is connected to accumulator unit by pipeline, its air gate is used for being connected to by pipeline the braking during standstill air chamber of automobile brake chamber, and its deflation hole is connected with atmosphere.
This electronic brake control system also comprises pressure sensor, this pressure sensor be located on the described accumulator unit or with pipeline that described accumulator unit links to each other on, described pressure sensor connects described electronic brake control ECU by wire.
Described accumulator unit is an automobile air cylinder that arranges separately, and its braking during standstill inlet end connects the braking during standstill electromagnetic valve, and its emergency brake inlet end connects the emergency brake electromagnetic valve.
Described gas change-over valve is pneumatic two-position three-way valve.
The present invention also provides a kind of automobile with electronic brake control system, comprise power supply and ignition lock, and this automobile is equipped with the electronic brake switch at the maneuverable position of chaufeur, be furnished with electronic brake control ECU in the car hold body, one end of described electronic brake switch connects the signal input part of described electronic brake control ECU, the other end is used for connecting power supply, described electronic brake control ECU is provided with two ports that are used for receiving vehicle speed signal, its power positive end is used for being connected to by ignition lock the positive pole of described power supply, its power-extremely is used for being wired to the negative pole of described power supply, also be provided with automobile brake chamber on this automobile, described automobile brake chamber comprises main brake air chamber and braking during standstill air chamber, also be furnished with the emergency brake electromagnetic valve on this car chassis, braking during standstill electromagnetic valve and gas triple valve, one end of described emergency brake electromagnetic valve is used for the negative pole by wire connecting power, the emergency brake control output end of other end connecting electronic braking during standstill control ECU, its induction opening connects accumulator unit by pipeline, its air gate is used for being connected to by pipeline and gas change-over valve the main brake air chamber of automobile brake chamber, and its deflation hole is connected with atmosphere;
One end of described braking during standstill electromagnetic valve is used for the negative pole by wire connecting power, the braking during standstill control output end of other end connecting electronic braking during standstill control ECU, its induction opening connects accumulator unit by pipeline, its air gate is used for being connected to by pipeline the braking during standstill air chamber of automobile brake chamber, and its deflation hole is connected with atmosphere.
Also be furnished with cooling gas check valve on the chassis of this automobile, the induction opening of described cooling gas check valve connects the service brake valve by tracheae, and its air gate connects described gas change-over valve by tracheae.
The electronic brake control system of this automobile also is provided with pressure sensor, this pressure sensor be located on the described accumulator unit or with pipeline that described accumulator unit links to each other on, described pressure sensor connects described electronic brake control ECU by wire.
Described accumulator unit is an automobile air cylinder that arranges separately, and its emergency brake inlet end connects the emergency brake electromagnetic valve, and its braking during standstill inlet end connects the braking during standstill electromagnetic valve.
Described gas change-over valve is pneumatic two-position three-way valve.
The beneficial effect that the present invention reaches: (1) electronic brake control of the present invention ECU is connected with power supply by ignition lock, and braking during standstill control electromagnetic valve is connected with electronic brake control ECU, when power supply disconnects or ignition lock when not connecting, the mouth of electronic brake control ECU control braking during standstill control electromagnetic valve does not have current potential output, braking during standstill control electromagnetic valve is in the normal state, braking during standstill control electromagnetic valve is discharged to the air in the automobile parking braking air chamber in the atmosphere, thereby make automobile be in the braking during standstill state, reduce the generation of slide car accident, improved the safety of Parking;
(2) in addition, electronic brake control system of the present invention is provided with emergency brake control electromagnetic valve and braking during standstill control electromagnetic valve, when chaufeur is pressed the braking during standstill switch, ECU is at first according to the vehicle speed signal that receives, judge the size of the speed of a motor vehicle, thereby the control automobile carries out emergency brake or braking during standstill, when needs emergency brake or braking during standstill, gas in the automobile air cylinder enters in the corresponding air chamber of automobile brake chamber by corresponding electromagnetic valve, directly brake accordingly by the gas compression spring, shorten the reaction time of emergency brake and braking during standstill, improved the safety of driving.
Description of drawings
Fig. 1 is electronic parking control system control principle drawing of the present invention;
The specific embodiment
The present invention will be further described in detail below in conjunction with accompanying drawing.
Electronic brake control system embodiment of the present invention:
As shown in Figure 1, present embodiment braking during standstill control system comprises: electronic brake switch 35, electronic parking control ECU33, emergency brake control electromagnetic valve 42, braking during standstill control electromagnetic valve 41, gas triple valve 50, cooling gas check valve 51, automobile brake chamber 6, automobile air cylinder 7, pressure sensor 8.
In the present embodiment, electronic brake control ECU33 has the port a that receives vehicle speed signal, b, electronic brake control ECU33 is connected to the negative pole of power supply 32 by wire 10, an and end that connects ignition lock 31 by wire 16, the other end of this ignition lock is connected to the positive pole of power supply by wire 17, electronic brake switch 35 1 ends are connected to the negative pole (also can be connected to the positive pole of power supply 32) of power supply 32 by wire 10, the other end is by wire 11 connecting electronic Parkings control ECU, pressure sensor 8 for the pressure state that air receiver is provided is installed in automobile air cylinder 7, and link to each other by wire 15 and electronic brake control ECU, emergency brake control electromagnetic valve 42 is connected with electronic brake control ECU by wire 13, braking during standstill control electromagnetic valve 41 links to each other with electronic brake control ECU by wire 14, braking during standstill control electromagnetic valve 41 is connected to the negative pole of power supply by wire 10, link to each other with automobile brake chamber 6 by pipeline 24, and link to each other with automobile air cylinder 7 by pipeline 20, emergency brake control electromagnetic valve 42 links to each other with the negative pole of power supply by wire 10, link to each other with automobile air cylinder 7 by pipeline 21, by pipeline 22, gas circuit threeway 50, pipeline 23 links to each other with automobile brake chamber 6.Electronic brake controller ECU can judge startup emergency brake or braking during standstill according to the state of the speed of a motor vehicle, electronic brake master cock, the state of power supply, the state of automobile ignition switch.
The present invention has the embodiment of the automobile of electronic brake control system:
Automobile of the present invention has above-mentioned electronic brake control system, and wherein, electronic brake control ECU is arranged in the car hold body; The electronic brake switch is installed in the maneuverable position of chaufeur on the instrument desk, behind conventional brake inefficacy or stopping-down, connects this switch when chaufeur needs automobile parking braking, makes electronic brake control ECU work; Braking during standstill control electromagnetic valve, emergency brake control electromagnetic valve and gas triple valve are arranged on the car chassis.Simultaneously, also be furnished with cooling gas check valve 51 on this car chassis, this cooling gas check valve 51 links to each other with service brake valve 52 with gas triple valve 50 by tracheae 25, its effect is when preventing that conventional brake lost efficacy, the gas flow conventional brake system of emergency brake and cause emergency brake hydraulic performance decline or inefficacy, be the consideration that is in safety system, the service brake valve belongs to the part of automobile conventional brake.
Working process is as follows: when automobile ignition switch is not connected, the mouth of electronic brake control ECU control braking during standstill control electromagnetic valve does not have current potential output, braking during standstill control electromagnetic valve is in the normal state, braking during standstill control electromagnetic valve is discharged to the air in the automobile parking braking air chamber in the atmosphere, thereby makes automobile be in the braking during standstill state; When automobile ignition switch is opened, when chaufeur is pressed the electronic brake switch, ECU is by wire 11 electron gain parking brake signals in electronic brake control, at this moment electronic brake control ECU judges the speed of a motor vehicle of automobile according to the vehicle speed signal that receives, when the speed of a motor vehicle is higher than the setting speed of a motor vehicle, electronic brake control ECU makes emergency brake control electromagnetic valve work by wire 13, the gas of automobile air cylinder is by pipeline 21, emergency brake control electromagnetic valve, pipeline 22, the gas triple valve, pipeline 23 is added to the main brake air chamber of automobile brake chamber, make automobile be in the emergency brake state, when the speed of a motor vehicle of automobile is lower than the setting speed of a motor vehicle, the action that commutates of electronic brake control ECU control braking during standstill control electromagnetic valve, disconnecting automobile air cylinder is connected with the gas circuit of automobile brake chamber, the braking during standstill air chamber gas of automobile brake chamber is by pipeline 24, braking during standstill control electromagnetic valve is discharged in the atmosphere, make automobile brake chamber be in the braking during standstill mode of operation, realize the braking during standstill work of automobile.
In other embodiments, on the pipeline that pressure sensor can be located at automobile air cylinder is connected.
Claims (9)
1. electronic brake control system, comprise electronic brake control ECU, electronic brake switch and automobile brake chamber, one end of described electronic brake switch connects the signal input part of described electronic brake control ECU, the other end is used for connecting power supply, described electronic brake control ECU is provided with for the port that receives vehicle speed signal, its power positive end is used for being connected to by ignition lock the positive pole of described power supply, its power-extremely is used for being wired to the negative pole of described power supply, described automobile brake chamber comprises main brake air chamber and braking during standstill air chamber, it is characterized in that
This electronic brake control system also comprises emergency brake electromagnetic valve and braking during standstill electromagnetic valve, one end of described emergency brake electromagnetic valve is used for the negative pole by wire connecting power, the emergency brake control output end of other end connecting electronic braking during standstill control ECU, its induction opening connects accumulator unit by pipeline, its air gate is used for being connected to by pipeline and gas change-over valve the main brake air chamber of automobile brake chamber, and its deflation hole is connected with atmosphere;
One end of described braking during standstill electromagnetic valve is used for the negative pole by wire connecting power, the braking during standstill control output end of other end connecting electronic braking during standstill control ECU, its induction opening is connected to accumulator unit by pipeline, its air gate is used for being connected to by pipeline the braking during standstill air chamber of automobile brake chamber, and its deflation hole is connected with atmosphere.
2. electronic brake control system according to claim 1, it is characterized in that, this electronic brake control system also comprises pressure sensor, this pressure sensor be located on the described accumulator unit or with pipeline that described accumulator unit links to each other on, described pressure sensor connects described electronic brake control ECU by wire.
3. electronic brake control system according to claim 1 and 2, it is characterized in that, described accumulator unit is an automobile air cylinder that arranges separately, and its braking during standstill inlet end connects the braking during standstill electromagnetic valve, and its emergency brake inlet end connects the emergency brake electromagnetic valve.
4. electronic brake control system according to claim 1 is characterized in that, described gas change-over valve is pneumatic two-position three-way valve.
5. one kind has the as claimed in claim 1 automobile of electronic brake control system, comprise power supply and ignition lock, and this automobile is equipped with the electronic brake switch at the maneuverable position of chaufeur, be furnished with electronic brake control ECU in the car hold body, one end of described electronic brake switch connects the signal input part of described electronic brake control ECU, the other end is used for connecting power supply, described electronic brake control ECU is provided with two ports that are used for receiving vehicle speed signal, its power positive end is used for being connected to by ignition lock the positive pole of described power supply, its power-extremely is used for being wired to the negative pole of described power supply, also be provided with automobile brake chamber on this automobile, described automobile brake chamber comprises main brake air chamber and braking during standstill air chamber, it is characterized in that
Also be furnished with emergency brake electromagnetic valve, braking during standstill electromagnetic valve and gas triple valve on this car chassis, one end of described emergency brake electromagnetic valve is used for the negative pole by wire connecting power, the emergency brake control output end of other end connecting electronic braking during standstill control ECU, its induction opening connects accumulator unit by pipeline, its air gate is used for being connected to by pipeline and gas change-over valve the main brake air chamber of automobile brake chamber, and its deflation hole is connected with atmosphere;
One end of described braking during standstill electromagnetic valve is used for the negative pole by wire connecting power, the braking during standstill control output end of other end connecting electronic braking during standstill control ECU, its induction opening connects accumulator unit by pipeline, its air gate is used for being connected to by pipeline the braking during standstill air chamber of automobile brake chamber, and its deflation hole is connected with atmosphere.
6. according to claim 5 have an as claimed in claim 1 automobile of electronic brake control system, it is characterized in that, also be furnished with cooling gas check valve on the chassis of this automobile, the induction opening of described cooling gas check valve connects the service brake valve by tracheae, and its air gate connects described gas change-over valve by tracheae.
7. according to claim 5 have an as claimed in claim 1 automobile of electronic brake control system, it is characterized in that, the electronic brake control system of this automobile also is provided with pressure sensor, this pressure sensor be located on the described accumulator unit or with pipeline that described accumulator unit links to each other on, described pressure sensor connects described electronic brake control ECU by wire.
8. according to claim 5 or 7 describedly have an as claimed in claim 1 automobile of electronic brake control system, it is characterized in that, described accumulator unit is an automobile air cylinder that arranges separately, its emergency brake inlet end connects the emergency brake electromagnetic valve, and its braking during standstill inlet end connects the braking during standstill electromagnetic valve.
9. according to claim 5 or 6 describedly have an as claimed in claim 1 automobile of electronic brake control system, it is characterized in that described gas change-over valve is pneumatic two-position three-way valve.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
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CN201310038687.3A CN103072486B (en) | 2013-01-31 | 2013-01-31 | Electronic parking brake control system and automobile using same |
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CN201310038687.3A CN103072486B (en) | 2013-01-31 | 2013-01-31 | Electronic parking brake control system and automobile using same |
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CN103072486A true CN103072486A (en) | 2013-05-01 |
CN103072486B CN103072486B (en) | 2014-12-24 |
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CN201310038687.3A Expired - Fee Related CN103072486B (en) | 2013-01-31 | 2013-01-31 | Electronic parking brake control system and automobile using same |
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Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN108501920A (en) * | 2018-04-02 | 2018-09-07 | 武汉欧拓莫科技有限公司 | A kind of air-pressure type electronic parking braking system |
CN113276814A (en) * | 2020-02-20 | 2021-08-20 | 中车株洲电力机车研究所有限公司 | Braking system and control method and device thereof |
Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6361675A (en) * | 1986-09-01 | 1988-03-17 | Mitsubishi Electric Corp | Brake device for electric motor vehicle |
DE4314448A1 (en) * | 1993-05-03 | 1994-11-10 | Teves Gmbh Alfred | Brake system for motor vehicles with electric drive |
CN201309476Y (en) * | 2008-12-12 | 2009-09-16 | 东风汽车有限公司 | Electric control parking brake device for automobile |
CN101817344A (en) * | 2010-04-14 | 2010-09-01 | 奇瑞汽车股份有限公司 | Automatic parking-start assisting system and control method thereof |
CN102050116A (en) * | 2010-12-17 | 2011-05-11 | 西安正昌电子有限责任公司 | Electronic parking braking method |
CN102602385A (en) * | 2012-03-27 | 2012-07-25 | 三一集团有限公司 | Parking braking system and engineering machinery |
CN203157982U (en) * | 2013-01-31 | 2013-08-28 | 郑州宇通客车股份有限公司 | Electronic parking braking control system and automobile using same |
-
2013
- 2013-01-31 CN CN201310038687.3A patent/CN103072486B/en not_active Expired - Fee Related
Patent Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6361675A (en) * | 1986-09-01 | 1988-03-17 | Mitsubishi Electric Corp | Brake device for electric motor vehicle |
DE4314448A1 (en) * | 1993-05-03 | 1994-11-10 | Teves Gmbh Alfred | Brake system for motor vehicles with electric drive |
CN201309476Y (en) * | 2008-12-12 | 2009-09-16 | 东风汽车有限公司 | Electric control parking brake device for automobile |
CN101817344A (en) * | 2010-04-14 | 2010-09-01 | 奇瑞汽车股份有限公司 | Automatic parking-start assisting system and control method thereof |
CN102050116A (en) * | 2010-12-17 | 2011-05-11 | 西安正昌电子有限责任公司 | Electronic parking braking method |
CN102602385A (en) * | 2012-03-27 | 2012-07-25 | 三一集团有限公司 | Parking braking system and engineering machinery |
CN203157982U (en) * | 2013-01-31 | 2013-08-28 | 郑州宇通客车股份有限公司 | Electronic parking braking control system and automobile using same |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN108501920A (en) * | 2018-04-02 | 2018-09-07 | 武汉欧拓莫科技有限公司 | A kind of air-pressure type electronic parking braking system |
CN113276814A (en) * | 2020-02-20 | 2021-08-20 | 中车株洲电力机车研究所有限公司 | Braking system and control method and device thereof |
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