CN204264124U - For the pedal sense simulator of automobile line control brake system - Google Patents
For the pedal sense simulator of automobile line control brake system Download PDFInfo
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- CN204264124U CN204264124U CN201420698107.3U CN201420698107U CN204264124U CN 204264124 U CN204264124 U CN 204264124U CN 201420698107 U CN201420698107 U CN 201420698107U CN 204264124 U CN204264124 U CN 204264124U
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Abstract
For a pedal sense simulator for automobile line control brake system, belong to Automotive By-Wire Control Technology field.Comprise pedal, oil storage cup, master brake cylinder, stroke simulator and hydraulic control, pedal is provided with pedal stroke sensor, master brake cylinder is provided with first piston successively from left to right in cylinder chamber, first spring assembly, slide block, second piston and the second spring assembly, first piston is by push rod and pedal linkage, cylinder chamber is separated into ante-chamber and back cavity by stroke piston by the stroke simulator cylinder of stroke simulator, stroke piston is being provided with bump rubber towards the midway location of ante-chamber side, stroke retracing spring is provided with in ante-chamber, the cup chamber of oil storage cup is by oil circuit and master brake cylinder, stroke simulator cylinder and hydraulic control are communicated with, hydraulic control is communicated with master brake cylinder and stroke simulator cylinder by oil circuit.Advantage: there is emergency brake function, and structure simple, be easy to install and safeguard, low cost of manufacture.
Description
Technical field
The utility model belongs to Automotive By-Wire Control Technology field, is specifically related to a kind of pedal sense simulator for automobile line control brake system.
Background technology
Automobile braking mechanism is the important device ensureing vehicle safety travel, and line control brake system is the developing direction of automobile braking mechanism.Line control brake system operationally, the Signal analysis chaufeur braking intention exported according to pedal force sensor, pedal stroke sensor etc. by its control unit, thus send control signal and make brake actuator action and realize automobile brake.Compare traditional hydraulic brake system, line control brake system has the plurality of advantages such as structure is simple, braking response is fast, control accuracy is high.But electric controlled brake system eliminates brake pedal to be connected with the direct of brake wheel cylinder, specific device must be adopted to carry out simulating brake pedal reaction force, by simulating the relation of Conventional braking systems treadle effort and displacement, make chaufeur in braking procedure, have good brake pedal feel, accurately grasp apply the size of rate of braking.Therefore, accurately, reliably can react chaufeur braking intention, the pedal sense simulator of the good brake pedal feel of chaufeur can be provided again to become link indispensable in line control brake system research.
Brake pedal feel simulator is by the whether adjustable passive type and active of being divided into of treadle effort-stroke characteristic.Wherein passive type pedal sense simulator can be divided into again hydraulic type pedal sense simulator and spring loaded pedal sense simulator according to the difference of structure, no matter is that hydraulic type pedal sense simulator or spring loaded pedal sense simulator are all found to have defect in actual applications.Hydraulic type pedal sense simulator complex structure, take up room large, not easily install and safeguard, manufacturing cost is high; When real vehicle installs application, also need the response time considering situation and the system lost efficacy.Spring loaded pedal sense simulator does not possess emergency brake function, and namely when control element or the related elements inefficacy of brake system, automobile cannot realize emergency brake; Secondly, there is problem of aging in spring, rigidity changes can affect the stability of pedal characteristic, thus cause pedal characteristic curve to change; In addition, for the pedal sense simulator that parameters has been determined, its pedal characteristic curve is constant, fixes, do not have commonality to the brake pedal feel of chaufeur.And also there is following defect at present in active pedal sense simulator: one is identical with above-mentioned spring loaded pedal sense simulator, does not possess the function of emergency brake; Two is because accuracy requirement is high, so inner structure is complicated, causes that installation and maintenance difficulty is large, manufacturing cost is high.
In view of above-mentioned prior art, be necessary to be improved the structure of existing pedal sense simulator, for this reason, the applicant has done useful design, and technical scheme described below produces under this background.
Summary of the invention
The purpose of this utility model is to provide a kind of pedal sense simulator for automobile line control brake system, has emergency brake function, and structure simple, be easy to install and safeguard, low cost of manufacture.
The purpose of this utility model reaches like this, a kind of pedal sense simulator for automobile line control brake system, be characterized in: comprise pedal, oil storage cup, master brake cylinder, stroke simulator and hydraulic control, described pedal is provided with pedal stroke sensor, described master brake cylinder is cylindric, and first piston is provided with successively from left to right in cylinder chamber, first spring assembly, slide block, second piston and the second spring assembly, first piston is by push rod and pedal linkage, first piston, the cavity wall of slide block and the second piston and master brake cylinder forms and seals, the cylinder chamber of master brake cylinder is separated into the first front chamber, second front chamber, first rear chamber and the second rear chamber, described stroke simulator comprises stroke simulator cylinder, cylinder chamber is separated into ante-chamber and back cavity by stroke piston by described stroke simulator cylinder, described stroke piston is being provided with cylindrical buffer block towards the midway location of ante-chamber side, stroke retracing spring is provided with in ante-chamber, the cup chamber of described oil storage cup is communicated with the first front chamber of master brake cylinder and the ante-chamber of stroke simulator cylinder by an oil circuit, be communicated with the first rear chamber of master brake cylinder by another oil circuit, be communicated with hydraulic control by the 3rd oil circuit, hydraulic control by oil circuit again respectively with the second front chamber of master brake cylinder, the back cavity of the second rear chamber and stroke simulator cylinder is communicated with.
In a specific embodiment of the present utility model, the cross section of described first piston is horizontal T word, first piston is being formed with the first adapter shaft towards one end of push rod, first adapter shaft radially offers the first vertical oil through be communicated with the first front chamber, first piston is forming first piston chamber towards one end midway location of the first spring assembly, and first piston chamber forms towards the narrow contracting of the first adapter shaft the first horizontal oil through be communicated with the first vertical oil through, the first described spring assembly comprises the first spring perch, first retracing spring, first spool and the first assist spring, the base side wall of the first described spring perch outwards turns and is configured for the hard-wired First eaves with described slide block, the first described retracing spring is set in outside the first spring perch, one end of first retracing spring and first piston are conflicted, the other end and the First eaves of the first retracing spring are conflicted, first spool comprises the first valve seat and the first valve rod, first valve seat is arranged in the seat chamber of the first spring perch, fixedly mount with the first valve seat in the seat chamber that the first spring perch is stretched in one end of first valve rod, the other end of the first valve rod to be stretched in first piston chamber and to aim at the first horizontal oil through, first assist spring is arranged in the seat chamber of the first spring perch, one end of first assist spring and slide block are conflicted, the other end of the first assist spring and the first valve seat of the first spool are conflicted.
In another specific embodiment of the present utility model, the cross section of the second described piston is horizontal T word, second piston is being formed with the second adapter shaft towards one end of slide block, second adapter shaft and slide block connection, second adapter shaft radially offers the second vertical oil through be communicated with the first described rear chamber, second piston is forming the second plunger shaft towards one end midway location of the second spring assembly, and the second plunger shaft forms towards the narrow contracting of the second adapter shaft the second horizontal oil through be communicated with the second vertical oil through, the second described spring assembly comprises the second spring perch, second retracing spring, second spool and the second assist spring, the base side wall of the second described spring perch outwards turns and is configured for hard-wired second eaves with the diapire of master brake cylinder, the second described retracing spring is set in outside the second spring perch, one end and second piston of the second retracing spring are conflicted, the other end of the second retracing spring and second eaves are conflicted, second spool comprises the second valve seat and the second valve rod, second valve seat is arranged in the seat chamber of the second spring perch, fixedly mount with the second valve seat in the seat chamber that the second spring perch is stretched in one end of second valve rod, the other end of the second valve rod to be stretched in the second plunger shaft and to aim at the second horizontal oil through, second assist spring is arranged in the seat chamber of the second spring perch, one end of second assist spring and the diapire of master brake cylinder are conflicted, the other end of the second assist spring and the second valve seat of the second spool are conflicted.
In another specific embodiment of the present utility model, the described first horizontal oil through is configured to round taper hole towards one end of the first vertical oil through, and is configured to cylindrical hole towards the other end in first piston chamber; The other end termination of the first described valve rod is conical, for realizing the airtight inserting of the horizontal oil through with first.
In another specific embodiment of the present utility model, the described second horizontal oil through is configured to round taper hole towards one end of the second vertical oil through, and is configured to cylindrical hole towards the other end of the second plunger shaft; The other end termination of the second described valve rod is conical, for realizing the airtight inserting of the horizontal oil through with second.
Also have in a specific embodiment of the present utility model, described stroke simulator cylinder is cylinder block, and one end and the stroke piston of described stroke retracing spring are conflicted, and the other end of stroke retracing spring and the antetheca of ante-chamber are conflicted.
More of the present utility model and in a specific embodiment, described hydraulic control comprises hydraulic control unit, and (English full name is: Hydraulic Control Unit, English abbreviation is: HCU), first normally closed solenoid valve, second normally closed solenoid valve, first normally open solenoid valve and the second normally open solenoid valve, one end of the first described normally closed solenoid valve is communicated with by the back cavity of oil circuit with described stroke simulator cylinder, one end of second normally closed solenoid valve is communicated with the cup chamber of described oil storage cup by oil circuit, one end of first normally open solenoid valve is connected with hydraulic control unit respectively by oil circuit with one end of the second normally open solenoid valve, the other end of the first normally open solenoid valve is communicated with the second front chamber of master brake cylinder by oil circuit jointly with the other end of the first normally closed solenoid valve, second normally open solenoid valve is communicated with the second rear chamber of master brake cylinder by oil circuit jointly with the other end of the second normally closed solenoid valve, described hydraulic control unit, first normally closed solenoid valve, second normally closed solenoid valve, (English full name is: Electronic Control Unit with the electronic control unit in line control brake system respectively for first normally open solenoid valve and the second normally open solenoid valve, English abbreviation is: ECU) electrical connection.
In an of the present utility model and then specific embodiment, described first piston, slide block and the second piston are respectively at excircle setting-in first piston seal ring, slide block seal ring and the second piston packing ring, and first piston seal ring, slide block seal ring and the second piston packing ring make first piston, slide block and the second piston form with the cavity wall of described master brake cylinder respectively to seal.
Of the present utility model again more and in a specific embodiment, first front chamber of described master brake cylinder is equipped with seal cover cap, the first described adapter shaft runs through seal cover cap from the first front chamber and is connected with the push rod in the external world, the first described adapter shaft is also arranged with for forming with seal cover cap the adapter shaft seal ring sealed.
In an again of the present utility model and then specific embodiment, described slide block and the second piston are formed in one part.
The utility model, owing to have employed said structure, simulates first stage stroke by the first retracing spring and the second retracing spring combined action; Subordinate phase stroke is simulated by the first retracing spring and the combined action of stroke retracing spring; Phase III stroke is simulated by the first retracing spring, stroke retracing spring and bump rubber combined action, each stage stroke segmentation is obvious, its compared with prior art, the beneficial effect had: structure is simple, with low cost, be easy to manufacture and safeguard and have emergency brake function.
Accompanying drawing explanation
Fig. 1 is structure cutaway view of the present utility model.
Fig. 2 is pedal sense characteristic curve of the present utility model.
In figure: 1. pedal, 11. pedal stroke sensors, 2. oil storage cup, 3. master brake cylinder, 31. first pistons, 311. first adapter shafts, 3111. adapter shaft seal ring, 312. first vertical oil throughs, 313. first piston chambeies, 314. first horizontal oil throughs, 315. first piston seal rings, 32. first spring assemblies, 321. first spring perches, 3211. First eaves, 322. first retracing springs, 323. first spools, 3231. the first valve seat, 3232. the first valve rod, 324. first assist springs, 325. first retracing spring pads, 326. first assist spring pads, 33. slide blocks, 331. slide block seal rings, 34. second pistons, 341. second adapter shafts, 342. second vertical oil throughs, 343. second plunger shaft, 344. second horizontal oil throughs, 345. second piston packing rings, 35. second spring assemblies, 351. second spring perches, 3511. second eaves, 352. second retracing springs, 353. second spools, 3531. the second valve seat, 3532. the second valve rod, 354. second assist springs, 355. second retracing spring pads, 356. second assist spring pads, 36. first front chamber, 361. first front chamber's oil throughs, 362. seal cover cap, 37. second front chamber, 371. second front chamber's oil throughs, 38. first rear chamber, 381. first rear chamber's oil throughs, 39. second rear chamber, 391. second rear chamber's oil throughs, 4. stroke simulator, 41. stroke simulator cylinders, 42. stroke pistons, 421. bump rubbers, 43. ante-chambers, 431. ante-chamber oil throughs, 44. back cavities, 441. back cavity oil throughs, 45. stroke retracing springs, 46. stroke retracing spring pads, 5. hydraulic control, 51. hydraulic control units, 52. first normally closed solenoid valves, 53. second normally closed solenoid valves, 54. first normally open solenoid valves, 55. second normally open solenoid valves, 56. pressure sensors, 6. push rod.
Detailed description of the invention
Technical spirit of the present utility model and beneficial effect can be fully understood in order to make the public; applicant will describe in detail detailed description of the invention of the present utility model below by reference to the accompanying drawings; but applicant is not the restriction to technical scheme to the description of embodiment, any changing in the form rather than substance according to the utility model design all should be considered as protection domain of the present utility model.
Refer to Fig. 1, the utility model relates to a kind of pedal sense simulator for automobile line control brake system, comprise pedal 1, oil storage cup 2, master brake cylinder 3, stroke simulator 4 and hydraulic control 5, described pedal 1 is provided with pedal stroke sensor 11.Described master brake cylinder 3 is cylindric, and in cylinder chamber, be provided with first piston 31, first spring assembly 32, slide block 33, second piston 34 and the second spring assembly 35 from left to right successively, in the present embodiment, described slide block 33 and the second piston 34 are formed in one part.First piston 31 is linked by push rod 6 and pedal 1, and when chaufeur push down on the pedal 1, first piston 31 and the second piston 34 will stressed and (the diapire direction of master brake cylinder 3) movements to the right.First piston 31, slide block 33 and the second piston 34 are respectively at excircle setting-in first piston seal ring 315, slide block seal ring 331 and the second piston packing ring 345, first piston seal ring 315, slide block seal ring 331 and the second piston packing ring 345 make first piston 31, slide block 33 and the second piston 34 form with the cavity wall of described master brake cylinder 3 respectively to seal, the cylinder chamber of master brake cylinder 3 is separated into the first rear chamber of front chamber of front chamber 36, second 37, first 38 and the second rear chamber 39.The first described rear chamber of front chamber of front chamber 36, second 37, first 38 and the second rear chamber 39 offer the first front chamber's oil through 361, second front chamber's oil through 371, first rear chamber's oil through 381 and second rear chamber's oil through 391 at each self-corresponding sidewall.The first described front chamber 36 is also equipped with seal cover cap 362, the first described adapter shaft 311 runs through seal cover cap 362 from the first front chamber 36 and is connected with the push rod 6 in the external world, the first described adapter shaft 311 is also arranged with for forming with seal cover cap 362 the adapter shaft seal ring 3111 sealed.Described stroke simulator 4 comprises stroke simulator cylinder 41, and described stroke simulator cylinder 41 is cylinder block, and cylinder chamber is separated into ante-chamber 43 and back cavity 44 by stroke piston 42 by it.Described stroke piston 42 is being provided with cylindrical buffer block 421 towards the midway location of ante-chamber 43 side.Be provided with stroke retracing spring 45 in described ante-chamber 43, one end and the stroke piston 42 of described stroke retracing spring 45 are conflicted, and the other end of stroke retracing spring 45 is conflicted by the antetheca of stroke retracing spring pad 46 with ante-chamber 43.Ante-chamber 43 offers ante-chamber oil through 431 on the bottom sidewall near antetheca; Described back cavity 44 offers back cavity oil through 441 at rear wall midway location.The cup chamber of described oil storage cup 2 is communicated with first front chamber's oil through 361 of master brake cylinder 3 and the ante-chamber oil through 431 of stroke simulator cylinder 41 by an oil circuit, be communicated with first rear chamber's oil through 381 of master brake cylinder 3 by another oil circuit, be communicated with hydraulic control 5 by the 3rd oil circuit.Hydraulic control 5 is communicated with second front chamber's oil through 371, second rear chamber's oil through 391 of master brake cylinder 3 and the back cavity oil through 441 of stroke simulator cylinder 41 again respectively by oil circuit.
The cross section of described first piston 31 is horizontal T word, and first piston 31 is being formed with the first adapter shaft 311 towards one end of push rod 6.First adapter shaft 311 radially offers the first vertical oil through 312 be communicated with the first front chamber 36, first piston 31 is forming first piston chamber 313 towards one end midway location of the first spring assembly 32, and first piston chamber 313 forms towards the narrow contracting of the first adapter shaft 311 the first horizontal oil through 314 be communicated with the first vertical oil through 312.In the present embodiment, the described first horizontal oil through 314 is configured to round taper hole towards one end of the first vertical oil through 312, and is configured to cylindrical hole towards the other end in first piston chamber 313.The first described spring assembly 32 comprises the first spring perch 321, first retracing spring 322, first spool 323 and the first assist spring 324.The base side wall of the first described spring perch 321 outwards turns and is configured for the hard-wired First eaves 3211 with described slide block 33.The first described retracing spring 322 is set in outside the first spring perch 321, and conflicted with first piston 31 by the first retracing spring pad 325 in one end of the first retracing spring 322, the other end and the First eaves 3211 of the first retracing spring 322 are conflicted.First spool 323 comprises the first valve seat 3231 and the first valve rod 3232, first valve seat 3231 is arranged in the seat chamber of the first spring perch 321, fixedly mount with the first valve seat 3231 in the seat chamber that the first spring perch 321 is stretched in one end of first valve rod 3232, the other end of the first valve rod 3232 to be stretched in first piston chamber 313 and to aim at the first horizontal oil through 314, and this end termination is configured to the taper shape of horizontal oil through 314 adaptation with described first.First assist spring 324 is arranged in the seat chamber of the first spring perch 321, and conflicted with slide block 33 by the first assist spring pad 326 in one end of the first assist spring 324, the other end of the first assist spring 324 and the first valve seat 3231 of the first spool 323 are conflicted.
The cross section of the second described piston 34 is horizontal T word, second piston 34 is being formed with the second adapter shaft 341 towards one end of slide block 33, second adapter shaft 341 and slide block 33 connection, in the present embodiment, described slide block 33, first piston 34 and the second adapter shaft 341 are one-body molded.Second adapter shaft 341 radially offers the second vertical oil through 342 be communicated with the first rear chamber 38, second piston 34 is forming the second plunger shaft 343, second plunger shaft 343 towards narrow the second horizontal oil through 344 being formed and be communicated with the second vertical oil through 342 that contracts of the second adapter shaft 341 towards one end midway location of the second spring assembly 35.Described second horizontal oil through 344 is configured to round taper hole towards one end of the second vertical oil through 342, and is configured to cylindrical hole towards the other end of the second plunger shaft 343.The second described spring assembly 35 comprises the second spring perch 351, second retracing spring 352, second spool 353 and the second assist spring 354.The base side wall of the second described spring perch 351 outwards turns and is configured for hard-wired second eaves 3511 with the diapire of master brake cylinder 3.The second described retracing spring 352 is set in outside the second spring perch 351, and conflicted by the second retracing spring pad 355 and the second piston 34 in one end of the second retracing spring 352, the other end and second eaves 3511 of the second retracing spring 352 are conflicted.Second spool 353 comprises the second valve seat 3531 and the second valve rod 3532, second valve seat 3531 is arranged in the seat chamber of the second spring perch 351, fixedly mount with the second valve seat 3531 in the seat chamber that the second spring perch 351 is stretched in one end of second valve rod 3532, the other end of the second valve rod 3532 to be stretched in the second plunger shaft 343 and to aim at the second horizontal oil through 344, and this end termination is configured to the taper shape of horizontal oil through 344 adaptation with described second.Second assist spring 354 is arranged in the seat chamber of the second spring perch 351, conflicted with the diapire of master brake cylinder 3 by the second assist spring pad 356 in one end of second assist spring 354, the other end of the second assist spring 354 and the second valve seat 3531 of the second spool 353 are conflicted.
Described hydraulic control 5 comprises hydraulic control unit 51, first normally closed solenoid valve 52, second normally closed solenoid valve 53, first normally open solenoid valve 54, second normally open solenoid valve 55 and pressure sensor 56.One end of the first described normally closed solenoid valve 52 is communicated with by the back cavity 44 of oil circuit with described stroke simulator cylinder 41, one end of second normally closed solenoid valve 53 is communicated with by the cup chamber of oil circuit with described oil storage cup 2, one end of first normally open solenoid valve 54 is connected with hydraulic control unit 51 respectively by oil circuit with one end of the second normally open solenoid valve 55, the other end of the first normally open solenoid valve 54, the other end of the first normally closed solenoid valve 52 and pressure sensor 56 are communicated with second front chamber's oil through 371 of master brake cylinder 3 by oil circuit jointly, second normally open solenoid valve 55 is communicated with second rear chamber's oil through 391 of master brake cylinder 3 by oil circuit jointly with the other end of the second normally closed solenoid valve 53.Described hydraulic control unit 51, first normally closed solenoid valve 52, second normally closed solenoid valve 53, first normally open solenoid valve 54 and the second normally open solenoid valve 55 are electrically connected with the electronic control unit in line control brake system respectively; Described pedal stroke sensor 11 and pressure sensor 56 are also electrically connected with electronic control unit (not shown) respectively.The signal of electronic control unit set sensor input, hydraulic control control unit 51 makes corresponding actions, also controls the first normally closed solenoid valve 52, second normally closed solenoid valve 53, first normally open solenoid valve 54 and the second normally open solenoid valve 55 and completes opening and closing and switch.In the present embodiment, described hydraulic control unit 51, first normally closed solenoid valve 52, second normally closed solenoid valve 53, first normally open solenoid valve 54, second normally open solenoid valve 55, pressure sensor 56 and pedal stroke sensor 11 all adopt existing element, and the connection application between they and the electronic control unit of line control brake system has been prior art.
Please continue to refer to Fig. 1, and composition graphs 2, principle of work of the present utility model is described.When the non-push down on the pedal 1 of chaufeur, the first piston 31 in master brake cylinder 3 and the second piston 34 are in initial position respectively under the effect of the first retracing spring 322 and the second retracing spring 352; And the stroke piston 42 in stroke simulator cylinder 41 is in initial position under the effect of stroke retracing spring 45.Hydraulic oil is stored in advance in oil storage cup 2, one oil circuit of oil storage cup 2 enters the first front chamber 36 through first front chamber's oil through 361 of master brake cylinder 3, the hydraulic oil that hydraulic oil in first front chamber 36 enters in the second front chamber 37 of front chamber 37, second through the first horizontal oil through 314 of vertical oil through 312, first and first piston chamber 313 successively enters in the back cavity 44 of stroke simulator cylinder 41 through the back cavity oil through 441 of second front chamber's oil through 371 and stroke simulator cylinder 41 more successively; This oil circuit of oil storage cup 2 also makes ante-chamber 43 be full of hydraulic oil through the ante-chamber oil through 431 of stroke simulator cylinder 41 simultaneously.Another oil circuit of oil storage cup 2 makes to be full of hydraulic oil in the first rear chamber 38 of master brake cylinder 3 and the second rear chamber 39 through first rear chamber's oil through 381 of master brake cylinder 3.In above process, also hydraulic oil is filled with in each corresponding oil passage of simulator.Under w 0234038.1 normal braking conditions, when chaufeur push down on the pedal 1, the electronic control unit in line control brake system controls the first normally closed solenoid valve 52 and the second normally closed solenoid valve 53 is opened, and controls the first normally open solenoid valve 54 and the second normally open solenoid valve 55 cuts out.First piston 31 in master brake cylinder 3 and the second piston 34 is stressed moves right, first valve rod 3232 of the first spool 323 is gradually near the first horizontal oil through 314, when the conical termination of the first valve rod 3232 has just arrived the first horizontal oil through 314, the hydraulic oil flowing through the first horizontal oil through 314 starts to reduce, along with first piston 31 continue move to right, the hydraulic oil flowing through the first horizontal oil through 314 reduces gradually, when the conical termination of the first valve rod 3232 and the first horizontal oil through 314 completely inserting time, first horizontal oil through 314 is closed, this in stage first front chamber 36 and the second front chamber 37 in not build-up pressure.The produced effect that moves to right after second piston 34 is stressed is same as described above, when the conical termination of the second valve rod 3532 and the second horizontal oil through 344 completely inserting time, second horizontal oil through 344 is closed, this in stage first rear chamber 38 and the second rear chamber 39 in not build-up pressure.This process first retracing spring 322 and the second retracing spring 352 play simulation first stage stroke, as the line segment AB illustrated in Fig. 2.Then, chaufeur continues pedal 1, first piston 31 and the second piston 34 continue to move right, now start build-up pressure in the second front chamber 37, and along with moving to right further of first piston 31, pressure in second front chamber 37 continues to increase, the elastic force that the hydraulic pressure increased overcomes stroke retracing spring 45 in stroke simulator cylinder 41 and the friction force acted on stroke piston 42, promotion stroke piston 42 left (the antetheca direction of stroke simulator cylinder 41) is mobile, until bump rubber 421 on stroke piston 42 and stroke retracing spring pad 46 start to touch, this process first retracing spring 322 and stroke retracing spring 45 combined action, play simulation subordinate phase stroke, as the line segment BC illustrated in Fig. 2.Then, chaufeur continues pedal 1, along with moving to right further of first piston 31, hydraulic pressure in second front chamber 37 continues to increase, the pressure increased promotes stroke piston 42 to be continued to move to left, and now bump rubber 421 starts to be extruded, this process first retracing spring 322, stroke retracing spring 45 and bump rubber 421 combined action, play a part to simulate phase III stroke, as the line segment CD illustrated in Fig. 2.When the first retracing spring 322 and the second retracing spring 352 are extruded into a certain degree, first assist spring 324 and the second assist spring 354 are extruded, thus the first valve rod 3232 and the second valve rod 3532 can be assisted to seal the first horizontal oil through 314 and the second horizontal oil through 344 better, prevent when being given a shock or impact, the situation of liquid backflow occurs.
On the other hand, when electronic control unit failure in line control brake system, the first normally closed solenoid valve 52 and the second normally closed solenoid valve 53 close, and the first normally open solenoid valve 54 and the second normally open solenoid valve 55 are opened.After the first horizontal oil through 314 and the second horizontal oil through 344 are closed, the hydraulic oil in the second front chamber 37 of master brake cylinder 3 and the second rear chamber 39 flows directly into hydraulic control unit 51, realizes the function of emergency brake.
Claims (10)
1.
a kind of pedal sense simulator for automobile line control brake system, be characterized in: comprise pedal (1), oil storage cup (2), master brake cylinder (3), stroke simulator (4) and hydraulic control (5), described pedal (1) is provided with pedal stroke sensor (11), described master brake cylinder (3) is cylindric, and first piston (31) is provided with from left to right successively in cylinder chamber, first spring assembly (32), slide block (33), second piston (34) and the second spring assembly (35), first piston (31) is linked by push rod (6) and pedal (1), first piston (31), slide block (33) and the second piston (34) form with the cavity wall of master brake cylinder (3) and seal, the cylinder chamber of master brake cylinder (3) is separated into the first front chamber (36), second front chamber (37), first rear chamber (38) and the second rear chamber (39), described stroke simulator (4) comprises stroke simulator cylinder (41), cylinder chamber is separated into ante-chamber (43) and back cavity (44) by stroke piston (42) by described stroke simulator cylinder (41), described stroke piston (42) is being provided with cylindrical buffer block (421) towards the midway location of ante-chamber (43) side, stroke retracing spring (45) is provided with in ante-chamber (43), the cup chamber of described oil storage cup (2) is communicated with first front chamber (36) of master brake cylinder (3) and the ante-chamber (43) of stroke simulator cylinder (41) by an oil circuit, be communicated with first rear chamber (38) of master brake cylinder (3) by another oil circuit, be communicated with hydraulic control (5) by the 3rd oil circuit, hydraulic control (5) by oil circuit again respectively with second front chamber (37) of master brake cylinder (3), the back cavity (44) of the second rear chamber (39) and stroke simulator cylinder (41) is communicated with.
2.
pedal sense simulator for automobile line control brake system according to claim 1, it is characterized in that the cross section of described first piston (31) is horizontal T word, first piston (31) is being formed with the first adapter shaft (311) towards one end of push rod (6), first adapter shaft (311) radially offers the first vertical oil through (312) be communicated with the first front chamber (36), first piston (31) is forming first piston chamber (313) towards one end midway location of the first spring assembly (32), first piston chamber (313) forms towards the narrow contracting of the first adapter shaft (311) the first horizontal oil through (314) be communicated with the first vertical oil through (312), described the first spring assembly (32) comprises the first spring perch (321), first retracing spring (322), first spool (323) and the first assist spring (324), the base side wall of described the first spring perch (321) outwards turns and is configured for the hard-wired First eaves (3211) with described slide block (33), described the first retracing spring (322) is set in the first spring perch (321) outward, one end and the first piston (31) of the first retracing spring (322) are conflicted, the other end and the First eaves (3211) of the first retracing spring (322) are conflicted, first spool (323) comprises the first valve seat (3231) and the first valve rod (3232), first valve seat (3231) is arranged in the seat chamber of the first spring perch (321), fixedly mount with the first valve seat (3231) in the seat chamber that the first spring perch (321) is stretched in one end of first valve rod (3232), the other end of the first valve rod (3232) to be stretched in first piston chamber (313) and to aim at the first horizontal oil through (314), first assist spring (324) is arranged in the seat chamber of the first spring perch (321), one end and the slide block (33) of the first assist spring (324) are conflicted, the other end of the first assist spring (324) and first valve seat (3231) of the first spool (323) are conflicted.
3.
pedal sense simulator for automobile line control brake system according to claim 1, it is characterized in that the cross section of described the second piston (34) is horizontal T word, second piston (34) is being formed with the second adapter shaft (341) towards one end of slide block (33), second adapter shaft (341) and slide block (33) connection, second adapter shaft (341) radially offers the second vertical oil through (342) be communicated with described the first rear chamber (38), second piston (34) is forming the second plunger shaft (343) towards one end midway location of the second spring assembly (35), second plunger shaft (343) forms towards the narrow contracting of the second adapter shaft (341) the second horizontal oil through (344) be communicated with the second vertical oil through (342), described the second spring assembly (35) comprises the second spring perch (351), second retracing spring (352), second spool (353) and the second assist spring (354), the base side wall of described the second spring perch (351) outwards turns and is configured for hard-wired second eaves (3511) with the diapire of master brake cylinder (3), described the second retracing spring (352) is set in the second spring perch (351) outward, one end and second piston (34) of the second retracing spring (352) are conflicted, the other end and second eaves (3511) of the second retracing spring (352) are conflicted, second spool (353) comprises the second valve seat (3531) and the second valve rod (3532), second valve seat (3531) is arranged in the seat chamber of the second spring perch (351), fixedly mount with the second valve seat (3531) in the seat chamber that the second spring perch (351) is stretched in one end of second valve rod (3532), the other end of the second valve rod (3532) to be stretched in the second plunger shaft (343) and to aim at the second horizontal oil through (344), second assist spring (354) is arranged in the seat chamber of the second spring perch (351), one end of second assist spring (354) and the diapire of master brake cylinder (3) are conflicted, the other end of the second assist spring (354) and second valve seat (3531) of the second spool (353) are conflicted.
4.
pedal sense simulator for automobile line control brake system according to claim 2, it is characterized in that the first described horizontal oil through (314) is configured to round taper hole towards one end of the first vertical oil through (312), and be configured to cylindrical hole towards the other end of first piston chamber (313); The other end termination of described the first valve rod (3232) is conical, for realizing the airtight inserting with the first horizontal oil through (314).
5.
pedal sense simulator for automobile line control brake system according to claim 3, it is characterized in that the second described horizontal oil through (344) is configured to round taper hole towards one end of the second vertical oil through (342), and be configured to cylindrical hole towards the other end of the second plunger shaft (343); The other end termination of described the second valve rod (3532) is conical, for realizing the airtight inserting with the second horizontal oil through (344).
6.
pedal sense simulator for automobile line control brake system according to claim 1, it is characterized in that described stroke simulator cylinder (41) is cylinder block, one end and the stroke piston (42) of described stroke retracing spring (45) are conflicted, and the other end of stroke retracing spring (45) and the antetheca of ante-chamber (43) are conflicted.
7.
pedal sense simulator for automobile line control brake system according to claim 1, it is characterized in that described hydraulic control (5) comprises hydraulic control unit (51), first normally closed solenoid valve (52), second normally closed solenoid valve (53), first normally open solenoid valve (54) and the second normally open solenoid valve (55), one end of described the first normally closed solenoid valve (52) is communicated with by the back cavity (44) of oil circuit with described stroke simulator cylinder (41), one end of second normally closed solenoid valve (53) is communicated with by the cup chamber of oil circuit with described oil storage cup (2), one end of first normally open solenoid valve (54) is connected with hydraulic control unit (51) respectively by oil circuit with one end of the second normally open solenoid valve (55), the other end of the first normally open solenoid valve (54) is communicated with second front chamber (37) of master brake cylinder (3) by oil circuit jointly with the other end of the first normally closed solenoid valve (52), second normally open solenoid valve (55) is communicated with second rear chamber (39) of master brake cylinder (3) by oil circuit jointly with the other end of the second normally closed solenoid valve (53), described hydraulic control unit (51), first normally closed solenoid valve (52), second normally closed solenoid valve (53), first normally open solenoid valve (54) and the second normally open solenoid valve (55) are electrically connected with the electronic control unit in line control brake system respectively.
8.
pedal sense simulator for automobile line control brake system according to claim 1, it is characterized in that described first piston (31), slide block (33) and the second piston (34) are respectively at excircle setting-in first piston seal ring (315), slide block seal ring (331) and the second piston packing ring (345), first piston seal ring (315), slide block seal ring (331) and the second piston packing ring (345) make first piston (31), slide block (33) and the second piston (34) form with the cavity wall of described master brake cylinder (3) respectively and seal.
9.
pedal sense simulator for automobile line control brake system according to claim 2, it is characterized in that first front chamber (36) of described master brake cylinder (3) is equipped with seal cover cap (362), described the first adapter shaft (311) runs through seal cover cap (362) from the first front chamber (36) and is connected with the push rod (6) in the external world, described the first adapter shaft (311) is also arranged with for forming with seal cover cap 362 the adapter shaft seal ring (3111) sealed.
10.
pedal sense simulator for automobile line control brake system according to claim 1, is characterized in that described slide block (33) and the second piston (34) are formed in one part.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420698107.3U CN204264124U (en) | 2014-11-20 | 2014-11-20 | For the pedal sense simulator of automobile line control brake system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420698107.3U CN204264124U (en) | 2014-11-20 | 2014-11-20 | For the pedal sense simulator of automobile line control brake system |
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| Publication Number | Publication Date |
|---|---|
| CN204264124U true CN204264124U (en) | 2015-04-15 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420698107.3U Expired - Fee Related CN204264124U (en) | 2014-11-20 | 2014-11-20 | For the pedal sense simulator of automobile line control brake system |
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| Country | Link |
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| CN (1) | CN204264124U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107472223A (en) * | 2017-08-15 | 2017-12-15 | 宁波拓普智能刹车系统有限公司 | A kind of analogue means of adjustable automobiles brake pedal feel |
| CN107845321A (en) * | 2017-12-19 | 2018-03-27 | 哈尔滨市计量检定测试院 | A kind of fluid pressure type moment of torsion connects simulator |
| CN110228456A (en) * | 2019-06-29 | 2019-09-13 | 华南理工大学 | A kind of integral type pedal sense simulator with fail safe function |
| CN113386722A (en) * | 2021-06-03 | 2021-09-14 | 东风柳州汽车有限公司 | Brake system and automobile |
-
2014
- 2014-11-20 CN CN201420698107.3U patent/CN204264124U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107472223A (en) * | 2017-08-15 | 2017-12-15 | 宁波拓普智能刹车系统有限公司 | A kind of analogue means of adjustable automobiles brake pedal feel |
| CN107845321A (en) * | 2017-12-19 | 2018-03-27 | 哈尔滨市计量检定测试院 | A kind of fluid pressure type moment of torsion connects simulator |
| CN107845321B (en) * | 2017-12-19 | 2023-12-05 | 哈尔滨市计量检定测试院 | Hydraulic torque connection simulator |
| CN110228456A (en) * | 2019-06-29 | 2019-09-13 | 华南理工大学 | A kind of integral type pedal sense simulator with fail safe function |
| CN113386722A (en) * | 2021-06-03 | 2021-09-14 | 东风柳州汽车有限公司 | Brake system and automobile |
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Granted publication date: 20150415 Termination date: 20181120 |