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Brake-by-wire system with complete failure operation capacity and vehicle

A brake-by-wire, run-ability technology, used in braking safety systems, etc.

Inactive Publication Date: 2020-10-27
TSINGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, in the L4 and L5 autonomous driving environment, there is no driver to take over the vehicle, so the traditional fail-safe level brake-by-wire system is no longer suitable for L4 and L5 autonomous driving

Method used

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  • Brake-by-wire system with complete failure operation capacity and vehicle
  • Brake-by-wire system with complete failure operation capacity and vehicle

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] The basic idea of ​​the brake-by-wire system with complete fail-operational capability proposed in this embodiment is: for the brake-by-wire system that requires the motor to actively build pressure, the motor is a relatively weak link in the entire system. Another complete motor system is backed up near its spatial location, and the two can share the transmission mechanism of the original brake-by-wire system. When no fault occurs in the system, the first motor system is combined with the transmission mechanism, and the backup second motor system is disconnected from the transmission mechanism through the clutch device to maintain a standby state. When a fault occurs in the system, the clutch device switches quickly, disconnects the first motor system, and connects the backup motor to the transmission mechanism. The control method of the backup motor system is the same as that of the first motor system, and the transmission structure is the same. Therefore, at the syst...

Embodiment 2

[0032] This embodiment also provides a vehicle, which is equipped with the brake-by-wire system of Embodiment 1.

Embodiment 3

[0034] The brake-by-wire system with complete failure operation capability of embodiment 1 is applied in the braking process of the vehicle to be tested in detail below, specifically:

[0035] S1, such as figure 2 As shown, the brake-by-wire system of Embodiment 1 is installed on the vehicle to be tested, and the vehicle to be tested includes a brake master cylinder 601, an oil pot 602, a primary piston 603, a secondary piston 604, a pedal simulator 605, and a pressure sensor 606,607, normally closed solenoid valve 608, normally open solenoid valve 609,610, brake pedal 611, brake wheel cylinder 612, pedal push rod 613, existing devices such as pressure regulating module 614 (ABS or ESC). Wherein, the first clutch device 3 is composed of a driving part 31 and a driven part 32 , the second clutch device 4 is composed of a driving part 41 and a driven part 42 , and both driven parts 32 and 42 are connected with the transmission mechanism 5 .

[0036]S2. When the brake-by-wire s...

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PUM

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Abstract

The invention relates to a brake-by-wire system with complete failure operation capacity and a vehicle. The brake-by-wire system comprises a first motor system, a second motor system, a first clutch device, a second clutch device and a transmission mechanism. The first motor system is isolated from and combined with the transmission mechanism through the first clutch device; the second motor system is isolated from and combined with the transmission mechanism through the second clutch device; power of the first motor system and the second motor system is cut off or output, so that the first motor system and the second motor system share the transmission mechanism to achieve brake-by-wire. When the motor in the brake-by-wire system fails, the power system can be quickly switched, and the brake capacity of the brake system is maintained.

Description

technical field [0001] The invention relates to a brake-by-wire system with complete failure operation capability and a vehicle, and relates to the technical field of automobile brakes. Background technique [0002] The brake-by-wire system is the basis and premise for new energy vehicles to achieve braking energy recovery and intelligent vehicles to achieve active braking. It is crucial for intelligent vehicle functions such as driverless driving and vehicle safety. . According to the regulations of the Society of Automotive Engineers (SAE) on unmanned driving levels, L4 level is highly unmanned driving, and L5 level is full-working condition unmanned driving. These two levels of automatic driving do not require a driver under any circumstances. Takeover is the ultimate goal of unmanned driving. However, due to the high complexity of autonomous driving, various failures are inevitable in the car, especially the increase in the work intensity of the brake-by-wire system ma...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B60T17/18
CPCB60T17/18
Inventor 袁野张俊智何承坤季园
Owner TSINGHUA UNIV
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