Electronic hydraulic pressurization system and control method

A supercharging system and electronic control unit technology, applied in the direction of braking safety system, etc., to achieve good compensation ability, ensure personal and property safety, and maintain the effect of braking ability

Active Publication Date: 2020-09-04
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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  • Electronic hydraulic pressurization system and control method
  • Electronic hydraulic pressurization system and control method
  • Electronic hydraulic pressurization system and control method

Examples

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Embodiment

[0033] Example: The booster system of the present invention is mainly applied to the establishment of a high-pressure source of a vehicle-by-wire hydraulic brake system, but is not limited to other similar scenarios where pressure buildup of a liquid is required. In order to further illustrate the function of the present invention, the following combination image 3 A typical embodiment of the application of the present invention is introduced: the application in the vehicle brake-by-wire system.

[0034] The brake-by-wire system with fail-operational capability proposed in this embodiment is a brake-by-wire system that requires a motor for active pressure build-up. Another motor system is backed up nearby, 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 combined with the housing through the lockin...

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Abstract

The invention relates to an electronic hydraulic pressurization system and a control method. The electronic hydraulic pressurization system comprises a pressurization power source module, a pressurization transmission module, a brake main cylinder module and an electronic control unit, wherein the output end of the pressurization power source module is connected with the brake main cylinder modulethrough the pressurization transmission module, and the pressurization power source module achieves switching or superposition of pressurization torque through the pressurization transmission module;the electronic control unit controls output of the pressurization power source module and switching and mixing of the pressurization transmission module, and the brake main cylinder module is used for feeding back pressure signals to the electronic control unit. Two motors of the pressurization power source module are subjected to torque coupling through a planetary gear mechanism and output through a gear ring. The pressurization transmission module adopts a ball screw mechanism, and the gear ring is in threaded engagement with the outer circumference of a ball screw nut; and three driving pressurization modes are achieved through cooperation of two locking mechanisms and the two pressurization motors in terms of rotating speed and torque. It can be guaranteed that the pressurization capacity is still achieved when the first pressurization motor breaks down and fails.

Description

technical field [0001] The invention relates to the technical field of vehicle brake-by-wire, in particular to an electronic hydraulic booster system and a control method with a failure operation capability. Background technique [0002] Brake-by-wire system is the basis and premise for electric vehicle to realize braking energy recovery and intelligent vehicle to realize active braking, and it plays a vital role in realizing high-level unmanned driving technology. According to the regulations of the American Society of Automotive Engineers (SAE) for the driverless level, L4 and L5 autonomous driving does not require the driver to take over during the driving process. Therefore, in the above-mentioned level of autonomous driving, the use of a brake-by-wire system is an inevitable requirement. However, due to the high complexity of automatic driving, various failures are inevitable in the car, among which the failure of the braking system will lead to the reduction or even d...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B60T17/18
CPCB60T17/18
Inventor 季园何承坤张俊智侯晓慧
Owner TSINGHUA UNIV
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