CN211710802U - Brake pedal simulator with universality - Google Patents
Brake pedal simulator with universality Download PDFInfo
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- CN211710802U CN211710802U CN202020080777.4U CN202020080777U CN211710802U CN 211710802 U CN211710802 U CN 211710802U CN 202020080777 U CN202020080777 U CN 202020080777U CN 211710802 U CN211710802 U CN 211710802U
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- 239000012530 fluid Substances 0.000 claims abstract description 15
- 238000004088 simulation Methods 0.000 claims abstract description 12
- 230000009347 mechanical transmission Effects 0.000 claims abstract description 10
- 238000007789 sealing Methods 0.000 claims description 14
- 238000006073 displacement reaction Methods 0.000 claims description 13
- 230000005284 excitation Effects 0.000 claims description 11
- 230000008901 benefit Effects 0.000 description 4
- 230000008859 change Effects 0.000 description 4
- 238000013016 damping Methods 0.000 description 4
- 238000000034 method Methods 0.000 description 3
- 230000004044 response Effects 0.000 description 3
- 230000009471 action Effects 0.000 description 2
- 238000013528 artificial neural network Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000006870 function Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 230000035807 sensation Effects 0.000 description 2
- 230000007812 deficiency Effects 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 230000002441 reversible effect Effects 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
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Abstract
The utility model discloses a brake pedal simulator with universality, brake pedal feel simulator include mechanical transmission module, brake pedal feel simulation module and control module. The brake pedal feel simulation module replaces a hydraulic or elastic element with magnetorheological fluid, so that the structural complexity is greatly simplified; the property of the magnetorheological fluid flowing through the piston through hole is changed through the magnet exciting coil, and the size of the piston through hole is adjusted by combining the rotating angle of the electric control rotary plectrum; the utility model discloses the real-time strong, the general degree of adaptability is high, can provide the best brake pedal feedback for different drivers.
Description
Technical Field
The utility model belongs to the technical field of automobile brake system, specifically indicate a brake pedal simulator with universality.
Background
The brake-by-wire system replaces the original mechanical connection and hydraulic pipeline with an electronic circuit, and has the characteristics of high response speed, good brake performance and flexible arrangement. However, the brake-by-wire system cancels the hydraulic or mechanical connection between the brake pedal and the brake, so that the driver cannot directly sense the braking force fed back to the brake pedal during braking, and the braking feedback of the traditional brake system is lost. Drivers have long been accustomed to the pedal force and pedal travel fed back from the brake pedal during long-term braking operations. The pedal simulator is used for simulating the brake pedal feeling in a traditional brake system by certain elements or a control method in the pedal simulator during the running process of the vehicle.
The main pedal simulators today simulate the pedal force by hydraulic, pneumatic or elastic elements. For example, the Chinese utility model has the patent application number of CN201821895438.0, and the name of the pedal simulator of the linear control actuating system adopts the cylinder valve and a plurality of air guide channels to simulate the real feeling of the traditional brake pedal, and the foot feeling is comfortable and accurate in the treading process; the Chinese utility model has the patent application number of CN201520098595.9, adopts the variable cylinder body internal diameter in the title "a double spring footboard sensation simulator", and the form of two sections springs of double piston simulates the brake pedal sensation. The brake-by-wire pedal simulators proposed by the above two patents are difficult to accurately simulate by using springs due to the nonlinearity of the pedal characteristics. In addition, the use of both pneumatic and hydraulic pressure requires a number of auxiliary structures, increasing the complexity of the system. And different people feel different feedback to the pedal, especially when an emergency occurs, it is difficult for old people and women to exert the maximum braking force according to the conventional pedal characteristics.
The magnetorheological fluid is a novel intelligent material, can be reversibly transformed between fluid and solid when an applied external magnetic field changes, and has the advantages of good controllability, no pollution, low energy consumption and the like; the characteristics of the brake pedal are accurately and smoothly simulated by utilizing the advantages of quick control, high response speed, continuous and sustainable change of damping, light weight and the like of the magnetorheological fluid; the development and design of the brake-by-wire system of the automobile are facilitated, and certain market value and economic benefit are achieved.
Disclosure of Invention
In view of the above-mentioned deficiencies in the prior art, it is an object of the present invention to provide a brake pedal simulator with universality to overcome the problems existing in the prior art. The utility model discloses very big simplification the system complexity to very high universality has.
In order to achieve the above purpose, the utility model adopts the following technical scheme:
the utility model discloses a brake pedal simulator with universality, include: the brake pedal feeling simulation module comprises a mechanical transmission module, a brake pedal feeling simulation module and a control module;
the mechanical transmission module comprises: the brake pedal, the pedal rotating shaft, the connecting rod and the push rod are arranged on the brake pedal;
the input end of the pedal rotating shaft is fixedly connected with the output end of the brake pedal, and the output end of the pedal rotating shaft is fixedly connected with the input end of the connecting rod; the output end of the connecting rod is hinged with the input end of the push rod; an L-shaped through hole is formed in the push rod;
the brake pedal feel simulation module includes: the device comprises a first-stage pedal simulator, a second-stage pedal simulator, a return spring, a spring base, a piston, a sealing ring A, a sealing ring B, an excitation coil, a boss return spring, a chute, a lead and an electric control rotary shifting piece;
the pedal simulator is in a two-stage step type and comprises a first-stage pedal simulator and a second-stage pedal simulator; magnetorheological fluid is filled in the secondary pedal simulator; the piston is fixedly connected with a push rod of the mechanical transmission module and is positioned in the secondary pedal simulator, a plurality of through holes are formed in the circular end face of the piston, a blind hole is formed in one end of the inner core of the piston, and the blind hole is communicated with the L-shaped through hole in the push rod; the spring base is fixed at the left end and the right end in the first-level pedal simulator, and a round hole is formed in the middle of the spring base for the push rod to pass through; the left end and the right end of the return spring are respectively fixedly connected with the spring base; the sealing ring A is sleeved on the push rod and tightly attached to the inner wall of the input end of the secondary pedal simulator; the sealing ring B is sleeved on the cylindrical surface of the piston and is tightly attached to the inner wall of the secondary pedal simulator; the excitation coil is wound on the inner core of the piston; the number of the electric control rotary shifting pieces corresponds to that of the through holes; each is fixed beside the through hole and positioned in the piston; the lead is connected with the excitation coil and the electric control rotary shifting piece through the lead hole; the lead is positioned in the blind hole of the piston inner core and the L-shaped through hole in the push rod so as to be connected with the control module; the sliding chute is arranged on the side wall of the secondary pedal simulator, which is far away from the input end; the boss is slidably positioned in the sliding groove; one end of the boss return spring is fixedly connected with the boss, and the other end of the boss return spring is fixed on the end wall, far away from the input end, of the secondary pedal simulator;
the control module includes: the system comprises a sensor group, an electronic control unit and a power supply loop;
the sensor group includes: a brake pedal displacement sensor, a brake pedal force sensor; the brake pedal displacement sensor is arranged on the first-stage pedal simulator close to the input end of the push rod and used for receiving a brake pedal displacement signal input by a driver; the brake pedal force sensor is arranged in the brake pedal and receives a force signal input by a driver; the electronic control unit is electrically connected with the sensor group, calculates after receiving signals of each sensor and outputs control current signals; and the size of a magnetic field generated by the exciting coil and the rotation angle of the electric control rotary plectrum are controlled by the power supply loop.
Furthermore, the spring base is fixed at the left end and the right end of the first-level pedal simulator through bolts.
The utility model has the advantages that:
compared with the existing hydraulic and pneumatic devices, the utility model does not need to install a hydraulic pump, a motor and various valve bodies, has simple structure and lightens the system mass; compared with an elastic element device, the magnetorheological fluid material has continuous and reversible viscosity change, and can feed back the brake pedal force more accurately, finely and smoothly with the assistance of the electric control rotary plectrum, and the magnetorheological fluid device has quick response and good comfort.
Drawings
Fig. 1 is a block diagram of a universal brake pedal simulator according to the present invention;
FIG. 2 is a cross-sectional view of the piston of the present invention;
FIG. 3 is a top view of the cross section of the plunger and piston according to the present invention;
FIG. 4 is a front view of the cross section of the push rod and the piston of the present invention;
FIG. 5 is a schematic diagram of the simulator of the present invention;
in the figure, 1-a brake pedal force sensor, 2-a brake pedal, 3-a connecting rod, 4-a pedal rotating shaft, 5-a brake pedal displacement sensor, 6-a spring base, 7-a bolt, 8-a first-level pedal simulator, 9-a push rod, 10-a return spring, 11-a second-level pedal simulator, 12-a lead, 13-an inner core, 14-a through hole, 15-a boss, 16-magnetorheological fluid, 17-a boss return spring, 18-a chute, 19-a power supply loop, 20-a sealing ring A, 21-an electronic control unit, 22-a sealing ring B, 23-an excitation coil, 24-a piston, 25-an electronic control rotary plectrum, 26-a lead hole A, 27-a lead hole B, 28-L-type through holes, 29-wire guide C, 30-blind hole, 31-wire guide D.
Detailed Description
In order to facilitate understanding of those skilled in the art, the present invention will be further described with reference to the following examples and drawings, which are not intended to limit the present invention.
Referring to fig. 1 to 4, the utility model discloses a by-wire brake pedal simulator with universality, includes: the brake pedal feeling simulation module comprises a mechanical transmission module, a brake pedal feeling simulation module and a control module;
the mechanical transmission module comprises: the brake pedal 2, the pedal rotating shaft 4, the connecting rod 3 and the push rod 9;
the input end of the pedal rotating shaft 4 is fixedly connected with the output end of the brake pedal 2, and the output end of the pedal rotating shaft is fixedly connected with the input end of the connecting rod 3; the output end of the connecting rod 3 is hinged with the input end of the push rod 9; an L-shaped through hole 28 is formed in the push rod 9;
the brake pedal feel simulation module includes: the device comprises a first-stage pedal simulator 8, a second-stage pedal simulator 11, a return spring 10, a spring base 6, a bolt 7, a piston 24, a sealing ring A20, a sealing ring B22, an excitation coil 23, a boss 15, a boss return spring 17, a sliding groove 18, a lead 12 and an electric control rotary shifting piece 25;
the pedal simulator is in a two-stage step type and comprises a first-stage pedal simulator 8 and a second-stage pedal simulator 11; magnetorheological fluid 16 is filled in the secondary pedal simulator 11; the piston 24 is fixedly connected with a push rod 9 of the mechanical transmission module and is positioned in the secondary pedal simulator, four through holes 14 (the number of the through holes 14 can be three, five or other) are formed in the circular end face of the piston 24, a blind hole 30 is formed in one end of the piston inner core 13, and the blind hole 30 is communicated with an L-shaped through hole 28 in the push rod 9; the spring base 6 is fixed at the left end and the right end in the first-stage pedal simulator 8 by bolts 7, and a round hole is formed in the middle for a push rod 9 to pass through; the left end and the right end of the return spring 10 are respectively fixedly connected with the spring base 6; the sealing ring A20 is sleeved on the push rod 9 in a ring manner and is tightly attached to the inner wall of the input end of the secondary pedal simulator 11; the sealing ring B22 is sleeved on the cylindrical surface of the piston 24 and clings to the inner wall of the secondary pedal simulator 11; the excitation coil 23 is wound on the inner core 13 of the piston; the number of the electric control rotary poking pieces 25 is four, and each electric control rotary poking piece is fixed beside the through hole 14 and positioned inside the piston 24; the lead 12 is respectively connected with the excitation coil 23 and the electric control rotary plectrum 25 through a lead hole A26, a lead hole B27, a lead hole C29 and a lead hole D31; the lead 12 is positioned in the blind hole 30 of the piston inner core 13 and the L-shaped through hole 28 in the push rod 9, so that the lead 12 is connected with the control module; the sliding groove 18 is arranged on the side wall of the secondary pedal simulator 11 far away from the input end; the boss 15 is slidably positioned in the sliding groove 18; and one end of the boss return spring 17 is fixedly connected with the boss 15, and the other end of the boss return spring is fixed on the end wall, far away from the input end, of the secondary pedal simulator 11.
The control module includes: a sensor group, an Electronic Control Unit (ECU) 15, and a power supply circuit 16;
the sensor group includes: a brake pedal displacement sensor 5, a brake pedal force sensor 1; the brake pedal displacement sensor 5 is arranged on a first-stage pedal simulator close to the input end of the push rod 9 and receives a brake pedal displacement signal input by a driver; the brake pedal force sensor 1 is arranged in the brake pedal 2 and receives a force signal input by a driver; the electronic control unit 21 is electrically connected with the sensor group, calculates after receiving signals of each sensor, and outputs control current signals; and controls the size of the magnetic field generated by the exciting coil 23 and the rotation angle of the electrically controlled rotary plectrum 25 through the power supply loop 16.
Referring to fig. 5, the working principle of the brake pedal simulator with universality of the present invention is as follows:
1) the brake pedal is used for inputting brake operation, and force is transmitted to the brake pedal feeling simulation module through the pedal rotating shaft, the connecting rod and the push rod;
2) the brake pedal displacement sensor and the brake pedal force sensor acquire a pedal displacement signal and a brake force signal input by a driver and send the pedal displacement signal and the brake force signal to the electronic control unit;
3) when the braking starts, no current flows in the magnet exciting coil, and the magnetorheological fluid hardly generates damping force after flowing through the magnet exciting coil; when the piston touches the boss and continues to compress the boss return spring to move forward, the power supply loop supplies power to the magnet exciting coil and the electric control rotary shifting piece under the control of the electronic control unit;
4) the electronic control unit inputs the current driver type, the brake pedal displacement and the pedal force loading speed obtained by calculating the brake pedal force to the input end of the radial basis function neural network RBF through the trained radial basis function neural network RBF, and outputs the damping force expected by the pedal simulator at the current moment;
5) the electronic control unit outputs control current to change the magnetic field intensity generated by the excitation coil according to expected damping force so as to change the property of the magnetorheological fluid flowing through the piston through hole, and adjusts the size of the piston through hole by adjusting the rotating angle of the electric control rotating plectrum, so that the flow area of the magnetorheological fluid is increased or reduced; to obtain an optimal pedal feedback force;
6) when the brake pedal is loosened, the current in the magnet exciting coil becomes zero, and the magnetorheological fluid is liquid with good fluidity; the brake pedal and the piston return to the initial position under the action of the return spring for the next braking, and the boss also returns to the initial position under the action of the boss return spring.
The utility model discloses the concrete application way is many, and the above-mentioned only is the preferred embodiment of the utility model, should point out, to ordinary skilled person in this technical field, under the prerequisite that does not deviate from the utility model discloses the principle, can also make a plurality of improvements, and these improvements also should be regarded as the utility model discloses a scope of protection.
Claims (2)
1. A brake pedal simulator with universality, which is characterized by comprising: the brake pedal feeling simulation module comprises a mechanical transmission module, a brake pedal feeling simulation module and a control module;
the mechanical transmission module comprises: the brake pedal, the pedal rotating shaft, the connecting rod and the push rod are arranged on the brake pedal;
the input end of the pedal rotating shaft is fixedly connected with the output end of the brake pedal, and the output end of the pedal rotating shaft is fixedly connected with the input end of the connecting rod; the output end of the connecting rod is hinged with the input end of the push rod; an L-shaped through hole is formed in the push rod;
the brake pedal feel simulation module includes: the device comprises a first-stage pedal simulator, a second-stage pedal simulator, a return spring, a spring base, a piston, a sealing ring A, a sealing ring B, an excitation coil, a boss return spring, a chute, a lead and an electric control rotary shifting piece;
the pedal simulator is in a two-stage step type and comprises a first-stage pedal simulator and a second-stage pedal simulator; magnetorheological fluid is filled in the secondary pedal simulator; the piston is fixedly connected with a push rod of the mechanical transmission module and is positioned in the secondary pedal simulator, a plurality of through holes are formed in the circular end face of the piston, a blind hole is formed in one end of the inner core of the piston, and the blind hole is communicated with the L-shaped through hole in the push rod; the spring base is fixed at the left end and the right end in the first-level pedal simulator, and a round hole is formed in the middle of the spring base for the push rod to pass through; the left end and the right end of the return spring are respectively fixedly connected with the spring base; the sealing ring A is sleeved on the push rod and tightly attached to the inner wall of the input end of the secondary pedal simulator; the sealing ring B is sleeved on the cylindrical surface of the piston and is tightly attached to the inner wall of the secondary pedal simulator; the excitation coil is wound on the inner core of the piston; the number of the electric control rotary shifting pieces corresponds to that of the through holes; each is fixed beside the through hole and positioned in the piston; the lead is connected with the excitation coil and the electric control rotary shifting piece through the lead hole; the lead is positioned in the blind hole of the piston inner core and the L-shaped through hole in the push rod; the sliding chute is arranged on the side wall of the secondary pedal simulator, which is far away from the input end; the boss is slidably positioned in the sliding groove; one end of the boss return spring is fixedly connected with the boss, and the other end of the boss return spring is fixed on the end wall, far away from the input end, of the secondary pedal simulator;
the control module includes: the system comprises a sensor group, an electronic control unit and a power supply loop;
the sensor group includes: a brake pedal displacement sensor and a brake pedal force sensor; the brake pedal displacement sensor is arranged on the first-stage pedal simulator close to the input end of the push rod; the brake pedal force sensor is arranged in the brake pedal; the electronic control unit is electrically connected with the sensor group; the size of a magnetic field generated by the exciting coil and the rotation angle of the electric control rotary plectrum are controlled by the power supply loop.
2. The universal brake pedal simulator of claim 1, wherein the spring mounts are bolted to the left and right ends of the primary pedal simulator.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020080777.4U CN211710802U (en) | 2020-01-14 | 2020-01-14 | Brake pedal simulator with universality |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020080777.4U CN211710802U (en) | 2020-01-14 | 2020-01-14 | Brake pedal simulator with universality |
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| CN211710802U true CN211710802U (en) | 2020-10-20 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112918441A (en) * | 2021-03-19 | 2021-06-08 | 江苏理工学院 | Active adjusting type control mechanism for brake feeling and pedal position of electric automobile |
| CN112918442A (en) * | 2021-03-19 | 2021-06-08 | 江苏理工学院 | Pedal mechanism with active adjustment of brake feeling and pedal position of new energy vehicle |
| CN113246936A (en) * | 2021-05-12 | 2021-08-13 | 南京航空航天大学 | Automobile brake-by-wire pedal simulator based on electromagnetic adjustment |
-
2020
- 2020-01-14 CN CN202020080777.4U patent/CN211710802U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112918441A (en) * | 2021-03-19 | 2021-06-08 | 江苏理工学院 | Active adjusting type control mechanism for brake feeling and pedal position of electric automobile |
| CN112918442A (en) * | 2021-03-19 | 2021-06-08 | 江苏理工学院 | Pedal mechanism with active adjustment of brake feeling and pedal position of new energy vehicle |
| CN113246936A (en) * | 2021-05-12 | 2021-08-13 | 南京航空航天大学 | Automobile brake-by-wire pedal simulator based on electromagnetic adjustment |
| CN113246936B (en) * | 2021-05-12 | 2022-04-08 | 南京航空航天大学 | Automobile brake-by-wire pedal simulator based on electromagnetic adjustment |
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